/* roulang page: index */
:root {
            --bg-primary: #F5F3EE;
            --bg-secondary: #EDEAE3;
            --bg-dark: #1A1A1A;
            --bg-dark-soft: #242422;
            --text-primary: #1A1A1A;
            --text-secondary: #5A5A5A;
            --text-muted: #8A877F;
            --text-light: #C9C6C0;
            --border-light: #D8D5CF;
            --border-silver: #C9C6C0;
            --accent: #2F4D4A;
            --accent-dark: #1F3A38;
            --accent-soft: rgba(47, 77, 74, 0.08);
            --accent-focus: rgba(47, 77, 74, 0.12);
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --sidebar-width: 220px;
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        /* ============ SIDEBAR NAV ============ */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            transition: transform var(--transition-base);
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 8px 20px 8px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

        .sidebar-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .sidebar-logo:hover {
            color: var(--text-primary);
        }

        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
            overflow-y: auto;
        }

        .sidebar-nav li {
            margin-bottom: 2px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .sidebar-nav a .nav-icon {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .sidebar-nav a:hover {
            color: var(--text-primary);
            background: var(--accent-soft);
            transform: translateX(2px);
            border-left-color: var(--accent);
        }

        .sidebar-nav a:hover .nav-icon {
            color: var(--accent);
        }

        .sidebar-nav a.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .sidebar-nav a.active .nav-icon {
            color: var(--accent);
        }

        .sidebar-footer-note {
            padding: 14px 8px 4px;
            border-top: 1px solid var(--border-light);
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
            letter-spacing: 0.04em;
        }

        /* ============ MOBILE TOPBAR ============ */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            z-index: 1035;
            align-items: center;
            padding: 0 16px;
            gap: 12px;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }

        .mobile-topbar .mobile-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .mobile-logo .logo-mark {
            width: 28px;
            height: 28px;
            background: var(--accent);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }

        .mobile-toggle {
            background: none;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 6px 10px;
            color: var(--text-secondary);
            font-size: 1.1rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            margin-left: auto;
        }

        .mobile-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        /* ============ MAIN CONTENT ============ */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            padding-top: 0;
            min-width: 0;
        }

        .container-custom {
            max-width: 1160px;
            margin: 0 auto;
            padding: 0 32px;
        }

        section {
            padding: 72px 0;
            border-bottom: 1px solid var(--border-light);
        }

        section:last-of-type {
            border-bottom: none;
        }

        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            border: 1px solid rgba(47, 77, 74, 0.15);
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.25;
        }

        .section-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 70ch;
            margin-bottom: 32px;
            line-height: 1.85;
        }

        /* ============ HERO ============ */
        .hero-section {
            padding: 72px 0 64px;
            background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-primary) 100%);
            border-bottom: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(47, 77, 74, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr 1fr;
            gap: 32px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-value-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .hero-value-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            background: rgba(255, 255, 255, 0.7);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }

        .hero-value-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .hero-value-item .hv-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--accent);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .hero-value-item .hv-text {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .hero-value-item .hv-text strong {
            color: var(--text-primary);
            font-weight: 700;
            display: block;
            font-size: 0.9rem;
            margin-bottom: 2px;
        }

        .hero-stage {
            text-align: center;
            position: relative;
        }

        .hero-stage-bg {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-dark);
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
        }

        .hero-stage-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(20, 24, 23, 0.55);
            pointer-events: none;
        }

        .hero-stage-content {
            position: relative;
            z-index: 2;
            padding: 40px 24px;
            color: #fff;
        }

        .hero-stage-content h1 {
            font-size: 2.4rem;
            font-weight: 900;
            letter-spacing: -0.04em;
            margin-bottom: 12px;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stage-content .hero-stage-sub {
            font-size: 0.9rem;
            color: var(--text-light);
            max-width: 32ch;
            margin: 0 auto 16px;
            line-height: 1.7;
        }

        .hero-kpi-strip {
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .hero-kpi {
            text-align: center;
            min-width: 80px;
        }

        .hero-kpi .kpi-num {
            font-family: var(--font-mono);
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .hero-kpi .kpi-label {
            font-size: 0.7rem;
            color: var(--text-light);
            letter-spacing: 0.06em;
            margin-top: 2px;
        }

        .hero-btn-group {
            display: flex;
            flex-direction: column;
            gap: 12px;
            align-items: stretch;
        }

        .btn-kaiyun {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 24px;
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-kaiyun-dark {
            background: var(--bg-dark);
            color: #fff;
        }

        .btn-kaiyun-dark:hover {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-kaiyun-accent {
            background: var(--accent);
            color: #fff;
        }

        .btn-kaiyun-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-kaiyun-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-silver);
        }

        .btn-kaiyun-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        .hero-trust-note {
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
            letter-spacing: 0.04em;
        }

        /* ============ KPI SECTION ============ */
        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .kpi-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
        }

        .kpi-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .kpi-card:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--border-silver);
            transform: translateY(-2px);
        }

        .kpi-card:hover::before {
            opacity: 1;
        }

        .kpi-card .kpi-value {
            font-family: var(--font-mono);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .kpi-card .kpi-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .kpi-card .kpi-trend {
            font-size: 0.75rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .kpi-card .kpi-trend.up {
            color: var(--accent);
        }

        /* ============ PAIN POINTS ============ */
        .pain-points-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .pain-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-fast);
        }

        .pain-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
            border-color: var(--border-silver);
        }

        .pain-card .pain-num {
            font-family: var(--font-mono);
            font-size: 0.8rem;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
            display: inline-block;
        }

        .pain-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .pain-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* ============ STEPS ============ */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            counter-reset: step-counter;
        }

        .step-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            position: relative;
            transition: all var(--transition-fast);
            counter-increment: step-counter;
        }

        .step-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }

        .step-card::after {
            content: counter(step-counter);
            position: absolute;
            top: 20px;
            right: 20px;
            font-family: var(--font-mono);
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--border-silver);
            line-height: 1;
            pointer-events: none;
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }

        .step-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
            max-width: 55ch;
        }

        /* ============ SERVICE MATRIX ============ */
        .service-matrix {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 24px;
        }

        .service-feature {
            background: var(--bg-dark);
            color: #fff;
            border-radius: var(--radius-md);
            padding: 36px 32px;
            background-image: url('/assets/images/coverpic/cover-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            min-height: 360px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            transition: all var(--transition-fast);
        }

        .service-feature:hover {
            box-shadow: var(--shadow-md);
        }

        .service-feature h3 {
            font-size: 1.4rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 8px;
            color: #fff;
        }

        .service-feature p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.75;
            max-width: 45ch;
            margin: 0;
        }

        .service-sub-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .service-sub-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            transition: all var(--transition-fast);
        }

        .service-sub-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .service-sub-card .ssc-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--accent);
            font-size: 0.85rem;
            margin-bottom: 10px;
        }

        .service-sub-card h4 {
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .service-sub-card p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* ============ COMPARISON ============ */
        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: stretch;
        }

        .compare-col {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
        }

        .compare-col.compare-better {
            border-color: var(--accent);
            box-shadow: 0 4px 16px rgba(47, 77, 74, 0.1);
        }

        .compare-col-header {
            padding: 16px 20px;
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compare-col.compare-better .compare-col-header {
            background: var(--accent-soft);
            border-color: rgba(47, 77, 74, 0.2);
            color: var(--accent);
        }

        .compare-list {
            list-style: none;
            padding: 8px 20px;
            margin: 0;
        }

        .compare-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.85rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .compare-list li:last-child {
            border-bottom: none;
        }

        .compare-list .ci-mark {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            flex-shrink: 0;
        }

        .ci-mark.yes {
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid var(--accent);
        }

        .ci-mark.no {
            background: #F0EEE9;
            color: var(--text-muted);
            border: 1px solid var(--border-light);
        }

        .compare-list .ci-text {
            flex: 1;
        }

        .compare-list .ci-delta {
            font-family: var(--font-mono);
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            white-space: nowrap;
        }

        /* ============ NEWS ============ */
        .news-layout {
            display: grid;
            grid-template-columns: 1.5fr 0.8fr;
            gap: 32px;
        }

        .news-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .news-item {
            padding: 18px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition-fast);
        }

        .news-item:hover {
            padding-left: 8px;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 6px;
        }

        .news-item .news-tag {
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: var(--radius-sm);
        }

        .news-item h4 {
            font-size: 1rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .news-item h4 a:hover {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .news-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        .news-sidebar {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            height: fit-content;
        }

        .news-sidebar h5 {
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .news-sidebar .ns-item {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.6;
            transition: color var(--transition-fast);
        }

        .news-sidebar .ns-item:hover {
            color: var(--accent);
        }

        .news-sidebar .ns-item:last-child {
            border-bottom: none;
        }

        /* ============ REVIEWS ============ */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .review-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            transition: all var(--transition-fast);
        }

        .review-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
            border-color: var(--border-silver);
        }

        .review-card .review-rating {
            color: var(--accent);
            font-size: 0.8rem;
            margin-bottom: 10px;
            letter-spacing: 0.06em;
        }

        .review-card p {
            font-size: 0.83rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 12px;
        }

        .review-card .review-author {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .review-card .review-author .ra-avatar {
            width: 28px;
            height: 28px;
            background: var(--accent-soft);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 0.7rem;
            font-weight: 700;
        }

        /* ============ PARTNERS / TAGS ============ */
        .partners-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .partner-tag {
            display: flex;
            align-items: center;
            gap: 12px;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 16px 18px;
            transition: all var(--transition-fast);
        }

        .partner-tag:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }

        .partner-tag .pt-icon {
            width: 36px;
            height: 36px;
            background: var(--bg-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--accent);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .partner-tag .pt-info strong {
            display: block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .partner-tag .pt-info span {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ============ TIER COMPARISON ============ */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .tier-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-fast);
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .tier-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }

        .tier-card.tier-featured {
            border-color: var(--accent);
            box-shadow: 0 4px 20px rgba(47, 77, 74, 0.1);
        }

        .tier-card .tier-badge {
            position: absolute;
            top: -10px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 20px;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .tier-card h4 {
            font-size: 1.1rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 6px;
            text-align: center;
        }

        .tier-card .tier-price {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            text-align: center;
            margin-bottom: 16px;
        }

        .tier-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
            flex: 1;
        }

        .tier-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.8rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tier-card ul li::before {
            content: '✓';
            color: var(--accent);
            font-weight: 700;
            font-size: 0.8rem;
        }

        /* ============ SECURITY ============ */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .security-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            transition: all var(--transition-fast);
        }

        .security-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .security-card .sec-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 14px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            color: var(--accent);
            font-size: 1.2rem;
        }

        .security-card h5 {
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .security-card p {
            font-size: 0.78rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* ============ BRAND INTRO ============ */
        .brand-intro {
            background: var(--bg-dark);
            color: #fff;
            border-radius: var(--radius-md);
            padding: 44px 40px;
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 36px;
            align-items: center;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
        }

        .brand-intro h3 {
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 8px;
            color: #fff;
            line-height: 1.3;
        }

        .brand-intro p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.85;
            margin: 0;
        }

        /* ============ FAQ ============ */
        .accordion-kaiyun .accordion-item {
            border: none;
            border-top: 1px solid var(--border-light);
            border-bottom: none;
            background: transparent;
        }

        .accordion-kaiyun .accordion-item:last-child {
            border-bottom: 1px solid var(--border-light);
        }

        .accordion-kaiyun .accordion-button {
            background: transparent;
            border: none;
            box-shadow: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 18px 16px 18px 0;
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
        }

        .accordion-kaiyun .accordion-button:not(.collapsed) {
            color: var(--accent);
            background: transparent;
            box-shadow: none;
        }

        .accordion-kaiyun .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }

        .accordion-kaiyun .accordion-button::after {
            background-size: 1rem;
            color: var(--text-muted);
        }

        .accordion-kaiyun .accordion-body {
            padding: 0 16px 20px 0;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.8;
            border-left: 2px solid var(--accent);
            margin-left: 0;
            padding-left: 16px;
        }

        /* ============ CTA FORM ============ */
        .cta-section {
            background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 100%);
            border-radius: var(--radius-md);
            padding: 48px 40px;
            color: #fff;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .cta-section h3 {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 10px;
            color: #fff;
        }

        .cta-section p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.8;
            margin: 0;
        }

        .cta-form .form-control {
            height: 48px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .cta-form .form-control::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }

        .cta-form .form-control:focus {
            border-color: rgba(255, 255, 255, 0.6);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }

        .cta-form .form-label {
            font-size: 0.8rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 6px;
        }

        .cta-form .btn-submit {
            height: 48px;
            background: #fff;
            color: var(--accent-dark);
            font-weight: 700;
            font-size: 0.9rem;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition-fast);
            letter-spacing: 0.04em;
            width: 100%;
        }

        .cta-form .btn-submit:hover {
            background: var(--bg-primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            transform: translateY(-1px);
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 48px 32px 32px;
            margin-left: var(--sidebar-width);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
            gap: 32px;
            max-width: 1160px;
            margin: 0 auto;
        }

        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand .footer-logo .logo-mark {
            width: 32px;
            height: 32px;
            background: var(--accent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            font-weight: 700;
        }

        .footer-brand p {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .footer-col h6 {
            font-size: 0.8rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.06em;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul a {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-col ul a:hover {
            color: #fff;
        }

        .footer-bottom {
            max-width: 1160px;
            margin: 32px auto 0;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            justify-content: space-between;
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        .footer-bottom .foot-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1199px) {
            .hero-grid {
                grid-template-columns: 1fr 1.3fr;
                gap: 20px;
            }
            .hero-btn-group {
                grid-column: span 2;
                flex-direction: row;
                justify-content: center;
            }
            .hero-value-list {
                flex-direction: row;
                flex-wrap: wrap;
            }
            .hero-value-item {
                flex: 1;
                min-width: 160px;
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 991px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar {
                transform: translateX(-100%);
                box-shadow: var(--shadow-md);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .site-footer {
                margin-left: 0;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-btn-group {
                grid-column: auto;
            }
            .hero-stage-bg {
                min-height: 260px;
            }
            .hero-stage-content h1 {
                font-size: 1.8rem;
            }
            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pain-points-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .service-matrix {
                grid-template-columns: 1fr;
            }
            .comparison-wrapper {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .reviews-grid {
                grid-template-columns: 1fr 1fr;
            }
            .partners-grid {
                grid-template-columns: 1fr 1fr;
            }
            .tier-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .brand-intro {
                grid-template-columns: 1fr;
                padding: 32px 24px;
            }
            .cta-section {
                grid-template-columns: 1fr;
                padding: 32px 24px;
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .section-title {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 767px) {
            .container-custom {
                padding: 0 20px;
            }
            section {
                padding: 48px 0;
            }
            .hero-section {
                padding: 48px 0 40px;
            }
            .hero-value-list {
                flex-direction: column;
            }
            .hero-value-item {
                min-width: auto;
            }
            .hero-stage-content h1 {
                font-size: 1.5rem;
            }
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .kpi-card .kpi-value {
                font-size: 1.6rem;
            }
            .pain-points-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .service-sub-grid {
                grid-template-columns: 1fr;
            }
            .reviews-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .partners-grid {
                grid-template-columns: 1fr;
            }
            .security-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-desc {
                font-size: 0.85rem;
            }
            .brand-intro {
                padding: 24px 18px;
            }
            .cta-section {
                padding: 24px 18px;
            }
        }

        @media (max-width: 575px) {
            .container-custom {
                padding: 0 14px;
            }
            .kpi-grid {
                grid-template-columns: 1fr;
            }
            .hero-stage-bg {
                min-height: 220px;
            }
            .hero-stage-content {
                padding: 24px 16px;
            }
            .hero-stage-content h1 {
                font-size: 1.3rem;
            }
            .hero-kpi-strip {
                gap: 12px;
            }
            .hero-kpi .kpi-num {
                font-size: 1.2rem;
            }
            .security-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .btn-kaiyun {
                padding: 12px 16px;
                font-size: 0.8rem;
            }
        }

        /* Sidebar overlay for mobile */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 1030;
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .sidebar-overlay.show {
            opacity: 1;
        }
        @media (max-width: 991px) {
            .sidebar-overlay.show {
                display: block;
            }
        }

        /* Animation classes */
        .fade-up {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.5s ease, transform 0.5s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category2 */
:root {
            --bg-primary: #F5F3EE;
            --bg-secondary: #EDEAE3;
            --bg-dark: #1A1A1A;
            --bg-dark-soft: #242422;
            --text-primary: #1A1A1A;
            --text-secondary: #5A5A5A;
            --text-muted: #8A877F;
            --text-light: #C9C6C0;
            --border-light: #D8D5CF;
            --border-silver: #C9C6C0;
            --accent: #2F4D4A;
            --accent-dark: #1F3A38;
            --accent-soft: rgba(47, 77, 74, 0.08);
            --accent-focus: rgba(47, 77, 74, 0.12);
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --sidebar-width: 220px;
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .main-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
        }

        /* ============ SIDEBAR NAV ============ */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            transition: transform var(--transition-base);
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 8px 20px 8px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

        .sidebar-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .sidebar-logo:hover {
            color: var(--text-primary);
        }

        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
            overflow-y: auto;
        }

        .sidebar-nav li {
            margin-bottom: 2px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .sidebar-nav a .nav-icon {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .sidebar-nav a:hover {
            color: var(--text-primary);
            background: var(--accent-soft);
            transform: translateX(2px);
            border-left-color: var(--accent);
        }

        .sidebar-nav a:hover .nav-icon {
            color: var(--accent);
        }

        .sidebar-nav a.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .sidebar-nav a.active .nav-icon {
            color: var(--accent);
        }

        .sidebar-footer-note {
            padding: 14px 8px 4px;
            border-top: 1px solid var(--border-light);
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
            letter-spacing: 0.04em;
        }

        /* ============ MOBILE TOPBAR ============ */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            z-index: 1035;
            align-items: center;
            padding: 0 16px;
            gap: 12px;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }

        .mobile-topbar .mobile-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .mobile-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }

        .mobile-topbar .btn-burger {
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 4px;
            margin-left: auto;
        }

        .btn-burger:focus {
            outline: none;
            box-shadow: none;
        }

        /* ============ OFF CANVAS ============ */
        .offcanvas-nav {
            width: 260px !important;
        }

        .offcanvas-nav .offcanvas-body {
            padding: 1rem 0.5rem;
        }

        .offcanvas-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.2rem;
            padding: 0 1rem 1rem;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 1rem;
        }

        .offcanvas-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }

        .offcanvas-nav .sidebar-nav a {
            padding: 12px 16px;
            font-size: 0.95rem;
        }

        /* ============ HERO ============ */
        .hero-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 520px;
            display: flex;
            align-items: flex-end;
            color: #fff;
            isolation: isolate;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(26, 26, 26, 0.55) 0%, rgba(26, 26, 26, 0.25) 40%, rgba(26, 26, 26, 0.75) 100%);
            z-index: -1;
        }

        .hero-content {
            padding: 64px 48px;
            max-width: 800px;
        }

        .hero-label {
            display: inline-block;
            background: rgba(47, 77, 74, 0.9);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin: 0 0 16px;
            color: #fff;
        }

        .hero-content .hero-sub {
            font-size: 1.1rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.9);
            max-width: 70ch;
            margin-bottom: 28px;
        }

        .btn-grp {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .btn-outline-light-custom {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.7);
            color: #fff;
            padding: 12px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .btn-outline-light-custom:hover {
            background: #fff;
            color: var(--text-primary);
            border-color: #fff;
        }

        .btn-accent-solid {
            background: var(--accent);
            color: #fff;
            border: 1px solid var(--accent);
            padding: 12px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .btn-accent-solid:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
        }

        /* ============ DATA SUMMARY STRIP ============ */
        .data-summary-strip {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            padding: 24px 48px;
        }

        .data-summary-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .data-summary-item {
            display: flex;
            align-items: baseline;
            gap: 12px;
            padding: 8px 0;
        }

        .data-summary-item .stat-number {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .data-summary-item .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        /* ============ SECTION COMMON ============ */
        .section-block {
            padding: 64px 48px;
        }

        .section-block.alt-bg {
            background: var(--bg-secondary);
        }

        .section-header {
            margin-bottom: 32px;
            max-width: 700px;
        }

        .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin: 0 0 8px;
        }

        .section-header p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
        }

        /* ============ FILTER BAR ============ */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 12px 16px;
        }

        .filter-group {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .filter-btn {
            background: transparent;
            border: 1px solid var(--border-silver);
            color: var(--text-secondary);
            padding: 6px 14px;
            font-size: 0.8rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        .filter-btn.active {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        .filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .filter-sort select {
            background: #FFFFFF;
            border: 1px solid var(--border-silver);
            border-radius: var(--radius-sm);
            padding: 6px 12px;
            font-size: 0.85rem;
            color: var(--text-primary);
            min-width: 140px;
        }

        .filter-sort select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-focus);
            outline: none;
        }

        .result-count {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-left: 8px;
        }

        /* ============ CARDS GRID ============ */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .data-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .data-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .data-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            filter: saturate(0.65);
            transition: transform var(--transition-base), filter var(--transition-base);
        }

        .data-card:hover .card-img {
            transform: scale(1.02);
            filter: saturate(0.9);
        }

        .data-card .card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }

        .card-tag {
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.03em;
        }

        .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin: 0 0 10px;
            line-height: 1.4;
        }

        .card-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            flex: 1;
            margin-bottom: 16px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
            margin-top: auto;
        }

        .card-meta .meta-link {
            font-weight: 600;
            color: var(--accent);
            transition: color var(--transition-fast);
        }

        .card-meta .meta-link:hover {
            color: var(--accent-dark);
        }

        .load-more-wrap {
            text-align: center;
            margin-top: 32px;
        }

        .btn-load-more {
            background: #FFFFFF;
            border: 1px solid var(--border-silver);
            color: var(--text-secondary);
            padding: 10px 24px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .btn-load-more:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        /* ============ COMPARISON ============ */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .compare-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-base);
        }

        .compare-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
        }

        .compare-card .compare-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .compare-card .compare-head .badge-compare {
            background: var(--accent);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
        }

        .compare-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.9rem;
        }

        .compare-item:last-child {
            border-bottom: none;
        }

        .compare-item .item-label {
            color: var(--text-secondary);
        }

        .compare-item .item-value {
            font-weight: 600;
            color: var(--text-primary);
            font-family: var(--font-mono);
        }

        .compare-item .item-value.highlight {
            color: var(--accent);
        }

        .compare-item .item-value.muted {
            color: var(--text-muted);
            font-weight: 400;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 800px;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            text-align: left;
            padding: 20px 0;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-question .faq-icon {
            font-size: 1rem;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-question.collapsed .faq-icon {
            transform: rotate(-90deg);
        }

        .faq-answer {
            padding: 0 0 20px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.85;
        }

        /* ============ CTA FORM ============ */
        .cta-section {
            background: var(--bg-dark);
            color: #fff;
            padding: 64px 48px;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .cta-info h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin: 0 0 16px;
            color: #fff;
        }

        .cta-info p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.85;
            max-width: 55ch;
        }

        .form-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-md);
        }

        .form-card .form-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .form-card .form-control {
            height: 48px;
            border: 1px solid var(--border-silver);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            padding: 0 14px;
            transition: all var(--transition-fast);
        }

        .form-card .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-focus);
        }

        .btn-submit-dark {
            background: var(--bg-dark);
            color: #fff;
            border: 1px solid var(--bg-dark);
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            width: 100%;
            transition: all var(--transition-fast);
        }

        .btn-submit-dark:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--bg-dark-soft);
            color: #C9C6C0;
            padding: 48px 48px 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .footer-brand .footer-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }

        .footer-brand p {
            font-size: 0.8rem;
            line-height: 1.7;
            color: #8A877F;
            max-width: 40ch;
            margin: 0;
        }

        .footer-col h6 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 6px;
        }

        .footer-col ul a {
            color: #8A877F;
            font-size: 0.8rem;
            transition: color var(--transition-fast);
        }

        .footer-col ul a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.7rem;
            color: #8A877F;
        }

        .foot-links {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .foot-links a {
            color: #8A877F;
            font-size: 0.7rem;
            transition: color var(--transition-fast);
        }

        .foot-links a:hover {
            color: #fff;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 991.98px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar {
                transform: translateX(-100%);
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .hero-section {
                min-height: 420px;
            }
            .hero-content {
                padding: 48px 32px;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .section-block {
                padding: 48px 32px;
            }
            .data-summary-strip {
                padding: 20px 32px;
            }
            .cta-section {
                padding: 48px 32px;
            }
            .site-footer {
                padding: 40px 32px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cards-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .compare-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 767.98px) {
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .hero-content {
                padding: 36px 20px;
            }
            .section-block {
                padding: 36px 20px;
            }
            .data-summary-strip {
                padding: 16px 20px;
            }
            .data-summary-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-section {
                padding: 36px 20px;
            }
            .site-footer {
                padding: 36px 20px 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            .hero-section {
                min-height: 360px;
            }
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-content .hero-sub {
                font-size: 0.95rem;
            }
            .btn-grp {
                flex-direction: column;
                width: 100%;
            }
            .btn-grp .btn {
                width: 100%;
            }
            .data-summary-item .stat-number {
                font-size: 1.6rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #F5F3EE;
            --bg-secondary: #EDEAE3;
            --bg-dark: #1A1A1A;
            --bg-dark-soft: #242422;
            --text-primary: #1A1A1A;
            --text-secondary: #5A5A5A;
            --text-muted: #8A877F;
            --text-light: #C9C6C0;
            --border-light: #D8D5CF;
            --border-silver: #C9C6C0;
            --accent: #2F4D4A;
            --accent-dark: #1F3A38;
            --accent-soft: rgba(47, 77, 74, 0.08);
            --accent-focus: rgba(47, 77, 74, 0.12);
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --sidebar-width: 220px;
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            transition: transform var(--transition-base);
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 8px 20px 8px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

        .sidebar-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .sidebar-logo:hover {
            color: var(--text-primary);
        }

        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
            overflow-y: auto;
        }

        .sidebar-nav li {
            margin-bottom: 2px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .sidebar-nav a .nav-icon {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .sidebar-nav a:hover {
            color: var(--text-primary);
            background: var(--accent-soft);
            transform: translateX(2px);
            border-left-color: var(--accent);
        }

        .sidebar-nav a:hover .nav-icon {
            color: var(--accent);
        }

        .sidebar-nav a.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .sidebar-nav a.active .nav-icon {
            color: var(--accent);
        }

        .sidebar-footer-note {
            padding: 14px 8px 4px;
            border-top: 1px solid var(--border-light);
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
            letter-spacing: 0.04em;
        }

        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            z-index: 1035;
            align-items: center;
            padding: 0 16px;
            gap: 12px;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }

        .mobile-topbar .mobile-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .mobile-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .mobile-topbar .hamburger-btn {
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color var(--transition-fast);
        }

        .mobile-topbar .hamburger-btn:hover {
            color: var(--accent);
        }

        .main-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            padding: 0;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .section-spacing {
            padding: 64px 0;
        }

        .section-spacing-sm {
            padding: 40px 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            display: inline-block;
            width: 20px;
            height: 2px;
            background: var(--accent);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 70ch;
            line-height: 1.85;
            margin-bottom: 32px;
        }

        .btn-dark-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-dark);
            color: #fff;
            border: 1px solid var(--bg-dark);
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .btn-dark-custom:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-silver);
            border-radius: var(--radius-sm);
            padding: 10px 20px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .btn-outline-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            padding: 72px 0 56px;
            background: var(--bg-dark);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.35;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.92) 0%, rgba(26, 26, 26, 0.65) 50%, rgba(47, 77, 74, 0.55) 100%);
            pointer-events: none;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .category-hero .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }

        .category-hero .hero-breadcrumb a {
            color: var(--text-light);
            transition: color var(--transition-fast);
        }

        .category-hero .hero-breadcrumb a:hover {
            color: #fff;
        }

        .category-hero .hero-breadcrumb .sep {
            color: var(--text-muted);
        }

        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.25;
        }

        .category-hero .hero-sub {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 60ch;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        .category-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* Data summary strip */
        .data-summary-strip {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            padding: 24px 0;
        }

        .data-summary-strip .summary-inner {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .summary-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 8px 16px;
            border-right: 1px solid var(--border-light);
        }

        .summary-item:last-child {
            border-right: none;
        }

        .summary-item .summary-num {
            font-family: var(--font-mono);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.02em;
        }

        .summary-item .summary-info .summary-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }

        .summary-item .summary-info .summary-desc {
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        /* Filter bar */
        .filter-bar {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
        }

        .filter-group {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }

        .filter-group .filter-label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-right: 4px;
        }

        .filter-btn {
            background: transparent;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 6px 16px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }

        .filter-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        .filter-btn.active {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            font-weight: 600;
        }

        /* Cards grid */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
            margin-bottom: 32px;
        }

        .result-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .result-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-silver);
        }

        .result-card .card-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .result-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: saturate(0.85) contrast(1.02);
            transition: transform var(--transition-base);
        }

        .result-card:hover .card-cover img {
            transform: scale(1.03);
        }

        .result-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            padding: 14px 20px 0;
        }

        .card-tag {
            display: inline-block;
            padding: 3px 10px;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            border-radius: 20px;
            background: var(--accent-soft);
            color: var(--accent);
        }

        .card-tag.hot {
            background: rgba(47, 77, 74, 0.14);
            color: var(--accent-dark);
        }

        .card-tag.new {
            background: #EDEAE3;
            color: var(--text-secondary);
        }

        .result-card .card-body {
            padding: 16px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .result-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .result-card .card-summary {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.75;
            flex: 1;
            margin-bottom: 16px;
        }

        .result-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        .result-card .card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .result-card .card-meta .meta-left i {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

        .result-card .card-meta .meta-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 0.75rem;
            transition: color var(--transition-fast);
        }

        .result-card .card-meta .meta-link:hover {
            color: var(--accent-dark);
        }

        /* FAQ */
        .faq-section {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 40px;
            box-shadow: var(--shadow-sm);
        }

        .accordion-custom .accordion-item {
            border: none;
            border-bottom: 1px solid var(--border-light);
            background: transparent;
        }

        .accordion-custom .accordion-item:last-child {
            border-bottom: none;
        }

        .accordion-custom .accordion-button {
            background: transparent;
            border: none;
            box-shadow: none;
            padding: 18px 0;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
            gap: 12px;
        }

        .accordion-custom .accordion-button::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--accent);
            transition: transform var(--transition-base);
            background: none;
            width: auto;
            height: auto;
            flex-shrink: 0;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            background: none;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--accent);
            background: transparent;
        }

        .accordion-custom .accordion-button:focus {
            outline: none;
            box-shadow: none;
        }

        .accordion-custom .accordion-body {
            padding: 0 0 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.85;
        }

        /* CTA Form */
        .cta-section {
            background: var(--bg-dark);
            border-radius: var(--radius-md);
            padding: 48px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }

        .cta-section .cta-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .cta-section .cta-info .cta-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .cta-section .cta-info .cta-desc {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
            max-width: 50ch;
        }

        .cta-form .form-control {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            height: 48px;
            font-size: 0.9rem;
            color: #fff;
            transition: all var(--transition-base);
        }

        .cta-form .form-control::placeholder {
            color: var(--text-muted);
        }

        .cta-form .form-control:focus {
            background: rgba(255, 255, 255, 0.14);
            border-color: var(--accent);
            color: #fff;
            box-shadow: 0 0 0 3px rgba(47, 77, 74, 0.3);
            outline: none;
        }

        .cta-form .form-label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-light);
            letter-spacing: 0.05em;
            margin-bottom: 6px;
        }

        .cta-form textarea.form-control {
            height: auto;
            min-height: 110px;
            resize: vertical;
        }

        .cta-form .btn-submit {
            background: #fff;
            color: var(--text-primary);
            border: 1px solid #fff;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            cursor: pointer;
            transition: all var(--transition-base);
            width: 100%;
            margin-top: 8px;
        }

        .cta-form .btn-submit:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        /* Pagination placeholder */
        .pagination-placeholder {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 24px 0;
        }

        .page-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--border-silver);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .page-dot.active {
            background: var(--accent);
            width: 24px;
            border-radius: 5px;
        }

        .page-dot:hover {
            background: var(--accent);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 56px 0 24px;
            margin-top: 64px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 24px;
        }

        .site-footer .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand .footer-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .site-footer .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 40ch;
        }

        .site-footer .footer-col h6 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }

        .site-footer .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .site-footer .footer-bottom .foot-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer .footer-bottom .foot-links a {
            color: var(--text-muted);
            font-size: 0.75rem;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-bottom .foot-links a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1199.98px) {
            .container-custom {
                padding: 0 24px;
            }
            .category-hero h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 991.98px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar {
                display: none;
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .category-hero {
                padding: 56px 0 40px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .data-summary-strip .summary-inner {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 12px;
            }
            .summary-item {
                padding: 6px 8px;
                border-right: none;
            }
            .cards-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .cta-section .cta-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 767.98px) {
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .data-summary-strip .summary-inner {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .section-spacing {
                padding: 40px 0;
            }
            .section-spacing-sm {
                padding: 24px 0;
            }
            .faq-section {
                padding: 24px 20px;
            }
            .cta-section {
                padding: 32px 24px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero .hero-sub {
                font-size: 0.95rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            .container-custom {
                padding: 0 16px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .category-hero {
                padding: 40px 0 32px;
            }
            .category-hero h1 {
                font-size: 1.4rem;
                line-height: 1.35;
            }
            .category-hero .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .result-card .card-title {
                font-size: 1rem;
            }
            .result-card .card-summary {
                font-size: 0.82rem;
            }
            .faq-section {
                padding: 20px 16px;
            }
            .accordion-custom .accordion-button {
                font-size: 0.95rem;
                padding: 14px 0;
            }
            .cta-section {
                padding: 24px 16px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* Offcanvas mobile */
        .offcanvas-custom {
            width: min(300px, 80vw) !important;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
        }

        .offcanvas-custom .offcanvas-header {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-light);
        }

        .offcanvas-custom .offcanvas-title {
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.02em;
        }

        .offcanvas-custom .offcanvas-title .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .offcanvas-custom .btn-close {
            font-size: 0.8rem;
            opacity: 0.6;
        }

        .offcanvas-custom .offcanvas-body {
            padding: 16px 12px;
        }

        .offcanvas-custom .mobile-nav-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .offcanvas-custom .mobile-nav-list li {
            margin-bottom: 2px;
        }

        .offcanvas-custom .mobile-nav-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
        }

        .offcanvas-custom .mobile-nav-list a .nav-icon {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .offcanvas-custom .mobile-nav-list a:hover {
            color: var(--text-primary);
            background: var(--accent-soft);
            border-left-color: var(--accent);
        }

        .offcanvas-custom .mobile-nav-list a.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .offcanvas-custom .mobile-nav-list a.active .nav-icon {
            color: var(--accent);
        }

/* roulang page: category3 */
:root {
            --bg-primary: #F5F3EE;
            --bg-secondary: #EDEAE3;
            --bg-dark: #1A1A1A;
            --bg-dark-soft: #242422;
            --text-primary: #1A1A1A;
            --text-secondary: #5A5A5A;
            --text-muted: #8A877F;
            --text-light: #C9C6C0;
            --border-light: #D8D5CF;
            --border-silver: #C9C6C0;
            --accent: #2F4D4A;
            --accent-dark: #1F3A38;
            --accent-soft: rgba(47, 77, 74, 0.08);
            --accent-focus: rgba(47, 77, 74, 0.12);
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --sidebar-width: 220px;
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            transition: transform var(--transition-base);
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 8px 20px 8px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }
        .sidebar-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .sidebar-logo:hover {
            color: var(--text-primary);
        }
        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
            overflow-y: auto;
        }
        .sidebar-nav li {
            margin-bottom: 2px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }
        .sidebar-nav a .nav-icon {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .sidebar-nav a:hover {
            color: var(--text-primary);
            background: var(--accent-soft);
            transform: translateX(2px);
            border-left-color: var(--accent);
        }
        .sidebar-nav a:hover .nav-icon {
            color: var(--accent);
        }
        .sidebar-nav a.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left-color: var(--accent);
            font-weight: 600;
        }
        .sidebar-nav a.active .nav-icon {
            color: var(--accent);
        }
        .sidebar-footer-note {
            padding: 14px 8px 4px;
            border-top: 1px solid var(--border-light);
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
            letter-spacing: 0.04em;
        }
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            z-index: 1035;
            align-items: center;
            padding: 0 16px;
            gap: 12px;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }
        .mobile-topbar .mobile-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .mobile-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .mobile-toggle {
            margin-left: auto;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.3rem;
            cursor: pointer;
            padding: 8px;
            line-height: 1;
        }
        .mobile-toggle:hover {
            color: var(--accent);
        }
        .offcanvas-sidebar {
            width: var(--sidebar-width) !important;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
        }
        .offcanvas-sidebar .sidebar-nav {
            padding: 16px;
        }
        .offcanvas-sidebar .sidebar-logo {
            padding: 16px;
        }
        .main-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .page-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 48px 40px;
            width: 100%;
            flex: 1;
        }
        .section-block {
            margin-bottom: 72px;
        }
        .section-heading {
            margin-bottom: 32px;
        }
        .section-heading .eyebrow {
            font-size: 0.8rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 8px;
            display: block;
        }
        .section-heading h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin: 0;
            color: var(--text-primary);
        }
        .section-heading p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-top: 12px;
            max-width: 70ch;
        }
        .hero-category {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-dark);
            color: #fff;
            padding: 64px 48px;
            margin-bottom: 48px;
        }
        .hero-category .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.3;
        }
        .hero-category .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,26,0.88) 0%, rgba(31,58,56,0.72) 100%);
        }
        .hero-category .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-category .hero-tag {
            display: inline-block;
            background: rgba(47,77,74,0.5);
            border: 1px solid rgba(201,198,192,0.35);
            color: var(--text-light);
            padding: 6px 14px;
            font-size: 0.78rem;
            letter-spacing: 0.06em;
            border-radius: var(--radius-sm);
            margin-bottom: 20px;
        }
        .hero-category h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #fff;
        }
        .hero-category .hero-desc {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.85);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 65ch;
        }
        .hero-category .hero-form {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(201,198,192,0.25);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(4px);
            max-width: 520px;
        }
        .hero-category .hero-form label {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 6px;
            display: block;
        }
        .hero-category .hero-form input,
        .hero-category .hero-form select {
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(201,198,192,0.3);
            color: #fff;
            border-radius: var(--radius-sm);
            height: 46px;
            padding: 0 14px;
            font-size: 0.9rem;
            width: 100%;
        }
        .hero-category .hero-form input::placeholder {
            color: rgba(201,198,192,0.7);
        }
        .hero-category .hero-form input:focus,
        .hero-category .hero-form select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(47,77,74,0.25);
            outline: none;
        }
        .hero-category .hero-form .btn-submit {
            background: #fff;
            color: var(--text-primary);
            border: none;
            height: 46px;
            padding: 0 24px;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .hero-category .hero-form .btn-submit:hover {
            background: var(--accent);
            color: #fff;
        }
        .stats-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 48px;
        }
        .stats-strip .stat-item {
            flex: 1 1 180px;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            text-align: left;
        }
        .stats-strip .stat-item .stat-num {
            font-family: var(--font-mono);
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.01em;
            display: block;
        }
        .stats-strip .stat-item .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .benefits-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .benefit-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all var(--transition-fast);
            position: relative;
        }
        .benefit-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .benefit-card .card-img {
            width: 120px;
            height: 90px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .benefit-card .card-body {
            flex: 1;
        }
        .benefit-card .tag-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }
        .benefit-card .tag {
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            letter-spacing: 0.04em;
        }
        .benefit-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin: 0 0 8px 0;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }
        .benefit-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0 0 12px 0;
            line-height: 1.75;
        }
        .benefit-card .card-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .scenario-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .scenario-item {
            background: var(--bg-secondary);
            border-radius: var(--radius-md);
            padding: 28px;
            border-left: 3px solid var(--accent);
            transition: all var(--transition-fast);
        }
        .scenario-item:hover {
            background: #fff;
            box-shadow: var(--shadow-sm);
            border-left-color: var(--accent-dark);
        }
        .scenario-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 8px 0;
            color: var(--text-primary);
        }
        .scenario-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.75;
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .process-step {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            position: relative;
            transition: all var(--transition-fast);
            counter-increment: step;
        }
        .process-step:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
        }
        .process-step::before {
            content: counter(step, decimal-leading-zero);
            font-family: var(--font-mono);
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent);
            display: block;
            margin-bottom: 12px;
            letter-spacing: 0.04em;
        }
        .process-step h4 {
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 8px 0;
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .mini-cards {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }
        .mini-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: all var(--transition-fast);
        }
        .mini-card:hover {
            border-color: var(--accent);
            transform: translateX(2px);
        }
        .mini-card .mini-img {
            width: 64px;
            height: 48px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .mini-card .mini-info h5 {
            font-size: 0.95rem;
            font-weight: 600;
            margin: 0 0 4px 0;
        }
        .mini-card .mini-info span {
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .faq-section .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border-light);
            border-radius: 0;
        }
        .faq-section .accordion-item:first-child {
            border-top: 1px solid var(--border-light);
        }
        .faq-section .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 24px 0;
            border: none;
            box-shadow: none;
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
        }
        .faq-section .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--accent);
            border-left-color: var(--accent);
            padding-left: 16px;
        }
        .faq-section .accordion-button:focus {
            box-shadow: none;
            border-left-color: var(--accent);
        }
        .faq-section .accordion-body {
            padding: 0 0 24px 16px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.8;
        }
        .cta-block {
            background: var(--bg-dark);
            border-radius: var(--radius-md);
            padding: 48px;
            color: #fff;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cta-block .cta-info h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin: 0 0 12px 0;
            letter-spacing: -0.02em;
            color: #fff;
        }
        .cta-block .cta-info p {
            color: rgba(255,255,255,0.75);
            font-size: 0.95rem;
            margin: 0;
            max-width: 55ch;
        }
        .cta-block .cta-form .form-control,
        .cta-block .cta-form .form-select {
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(201,198,192,0.3);
            color: #fff;
            border-radius: var(--radius-sm);
            height: 48px;
            font-size: 0.9rem;
            padding: 0 14px;
        }
        .cta-block .cta-form .form-control::placeholder {
            color: rgba(201,198,192,0.6);
        }
        .cta-block .cta-form .form-control:focus,
        .cta-block .cta-form .form-select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(47,77,74,0.25);
            background: rgba(255,255,255,0.12);
        }
        .cta-block .cta-form .btn-cta {
            background: #fff;
            color: var(--text-primary);
            border: none;
            height: 48px;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            padding: 0 28px;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .cta-block .cta-form .btn-cta:hover {
            background: var(--accent);
            color: #fff;
        }
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 56px 40px 24px;
            margin-top: auto;
        }
        .site-footer .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(201,198,192,0.15);
        }
        .site-footer .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .footer-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }
        .site-footer .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-light);
            opacity: 0.7;
            max-width: 42ch;
            line-height: 1.7;
        }
        .site-footer .footer-col h6 {
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px 0;
            letter-spacing: 0.04em;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul a {
            color: var(--text-light);
            opacity: 0.7;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }
        .site-footer .footer-col ul a:hover {
            color: #fff;
            opacity: 1;
        }
        .site-footer .footer-bottom {
            max-width: 1200px;
            margin: 24px auto 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-light);
            opacity: 0.65;
        }
        .site-footer .footer-bottom .foot-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-footer .footer-bottom .foot-links a {
            color: var(--text-light);
            transition: color var(--transition-fast);
        }
        .site-footer .footer-bottom .foot-links a:hover {
            color: #fff;
        }
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            letter-spacing: 0.01em;
            transition: all var(--transition-fast);
        }
        .btn-outline-accent {
            border: 1px solid var(--accent);
            color: var(--accent);
            background: transparent;
            padding: 10px 22px;
            font-size: 0.88rem;
        }
        .btn-outline-accent:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .text-accent {
            color: var(--accent) !important;
        }
        @media (max-width: 992px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.show {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .page-container {
                padding: 32px 20px;
            }
            .hero-category {
                padding: 48px 28px;
            }
            .hero-category h1 {
                font-size: 2.2rem;
            }
            .benefits-grid {
                grid-template-columns: 1fr;
            }
            .scenario-list {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
            .cta-block {
                grid-template-columns: 1fr;
                padding: 36px 28px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .hero-category {
                padding: 36px 20px;
            }
            .hero-category h1 {
                font-size: 1.8rem;
            }
            .stats-strip {
                gap: 10px;
            }
            .stats-strip .stat-item {
                flex: 1 1 140px;
                padding: 16px 18px;
            }
            .stats-strip .stat-item .stat-num {
                font-size: 1.4rem;
            }
            .benefit-card {
                flex-direction: column;
                padding: 20px;
            }
            .benefit-card .card-img {
                width: 100%;
                height: auto;
                aspect-ratio: 16/10;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .mini-cards {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-block .cta-form .d-flex {
                flex-direction: column;
                gap: 12px;
            }
        }
        @media (max-width: 576px) {
            .page-container {
                padding: 24px 14px;
            }
            .hero-category h1 {
                font-size: 1.5rem;
            }
            .hero-category .hero-form {
                padding: 16px;
            }
            .section-heading h2 {
                font-size: 1.5rem;
            }
            .process-step {
                padding: 20px;
            }
            .site-footer {
                padding: 40px 20px 16px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #F5F3EE;
            --bg-secondary: #EDEAE3;
            --bg-dark: #1A1A1A;
            --bg-dark-soft: #242422;
            --text-primary: #1A1A1A;
            --text-secondary: #5A5A5A;
            --text-muted: #8A877F;
            --text-light: #C9C6C0;
            --border-light: #D8D5CF;
            --border-silver: #C9C6C0;
            --accent: #2F4D4A;
            --accent-dark: #1F3A38;
            --accent-soft: rgba(47, 77, 74, 0.08);
            --accent-focus: rgba(47, 77, 74, 0.12);
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --sidebar-width: 220px;
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        /* ============ SIDEBAR NAV ============ */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            transition: transform var(--transition-base);
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 8px 20px 8px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

        .sidebar-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .sidebar-logo:hover {
            color: var(--text-primary);
        }

        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
            overflow-y: auto;
        }

        .sidebar-nav li {
            margin-bottom: 2px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .sidebar-nav a .nav-icon {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .sidebar-nav a:hover {
            color: var(--text-primary);
            background: var(--accent-soft);
            transform: translateX(2px);
            border-left-color: var(--accent);
        }

        .sidebar-nav a:hover .nav-icon {
            color: var(--accent);
        }

        .sidebar-nav a.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .sidebar-nav a.active .nav-icon {
            color: var(--accent);
        }

        .sidebar-footer-note {
            padding: 14px 8px 4px;
            border-top: 1px solid var(--border-light);
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
            letter-spacing: 0.04em;
        }

        /* ============ MOBILE TOPBAR ============ */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            z-index: 1035;
            align-items: center;
            padding: 0 16px;
            gap: 12px;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }

        .mobile-topbar .mobile-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .mobile-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }

        .menu-toggle {
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text-primary);
            padding: 4px 8px;
            cursor: pointer;
            transition: color var(--transition-fast);
        }

        .menu-toggle:hover {
            color: var(--accent);
        }

        .sidebar-backdrop {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.35);
            z-index: 1030;
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .sidebar-backdrop.show {
            display: block;
            opacity: 1;
        }

        @media (max-width: 991.98px) {
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
                box-shadow: var(--shadow-md);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .sidebar-backdrop {
                display: none;
            }
            .sidebar-backdrop.show {
                display: block;
            }
            .sidebar-footer-note {
                display: none;
            }
        }

        /* ============ MAIN LAYOUT ============ */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        @media (max-width: 991.98px) {
            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }
        }

        .content-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        @media (max-width: 575.98px) {
            .content-container {
                padding: 0 16px;
            }
        }

        /* ============ CATEGORY HERO ============ */
        .cat-hero {
            background: linear-gradient(180deg, rgba(245, 243, 238, 0.92), rgba(245, 243, 238, 0.82)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 72px 0 56px;
            border-bottom: 1px solid var(--border-light);
            position: relative;
        }

        .cat-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent) 0%, var(--accent) 24px, transparent 24px);
        }

        .cat-breadcrumb {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .cat-breadcrumb a {
            color: var(--text-secondary);
        }

        .cat-breadcrumb a:hover {
            color: var(--accent);
        }

        .cat-breadcrumb .sep {
            color: var(--text-light);
        }

        .cat-hero h1 {
            font-size: 3rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            color: var(--text-primary);
            line-height: 1.2;
        }

        .cat-hero .hero-sub {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 24px;
        }

        .cat-hero .quick-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .btn-ka {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition-base);
            letter-spacing: 0.02em;
            text-decoration: none;
        }

        .btn-ka-primary {
            background: var(--bg-dark);
            color: #fff;
            border-color: var(--bg-dark);
        }

        .btn-ka-primary:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .btn-ka-outline {
            background: transparent;
            color: var(--text-primary);
            border-color: var(--border-silver);
        }

        .btn-ka-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
            transform: translateY(-1px);
        }

        /* ============ STATS BAND ============ */
        .stats-band {
            padding: 32px 0;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
        }

        .stats-inner {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .stat-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 8px 16px;
            border-left: 3px solid var(--border-silver);
            transition: border-color var(--transition-fast);
        }

        .stat-item:hover {
            border-left-color: var(--accent);
        }

        .stat-value {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .stat-trend {
            font-size: 0.75rem;
            color: var(--accent);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-left: auto;
            white-space: nowrap;
        }

        /* ============ SECTION STANDARD ============ */
        .section-stand {
            padding: 64px 0;
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }

        .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin: 0;
            line-height: 1.3;
        }

        .section-title-sm {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin: 0;
        }

        /* ============ FILTER BAR ============ */
        .filter-bar {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-sm);
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            letter-spacing: 0.03em;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            font-size: 0.8rem;
            font-weight: 500;
            border-radius: 999px;
            border: 1px solid var(--border-silver);
            background: #fff;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-chip:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        .filter-chip.active {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        .sort-select {
            padding: 8px 32px 8px 12px;
            font-size: 0.85rem;
            border: 1px solid var(--border-silver);
            border-radius: var(--radius-sm);
            background: #fff url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%235A5A5A' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e") no-repeat right 10px center / 12px;
            appearance: none;
            color: var(--text-primary);
            cursor: pointer;
            transition: border-color var(--transition-fast);
        }

        .sort-select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-focus);
            outline: none;
        }

        /* ============ CARD LIST ============ */
        .ticket-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .ticket-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .ticket-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .ticket-cover {
            width: 100%;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--bg-secondary);
            position: relative;
        }

        .ticket-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: grayscale(20%);
            transition: transform var(--transition-base), filter var(--transition-base);
        }

        .ticket-card:hover .ticket-cover img {
            transform: scale(1.03);
            filter: grayscale(0%);
        }

        .ticket-cover .cover-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(26, 26, 26, 0.82);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            letter-spacing: 0.04em;
        }

        .ticket-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .ticket-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .ticket-tag {
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            background: var(--accent-soft);
            color: var(--accent);
            letter-spacing: 0.03em;
        }

        .ticket-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
            line-height: 1.4;
            letter-spacing: -0.01em;
        }

        .ticket-summary {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 16px;
            flex: 1;
        }

        .ticket-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.75rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }

        .ticket-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .ticket-meta .meta-link {
            margin-left: auto;
            font-weight: 600;
            color: var(--accent);
            transition: color var(--transition-fast);
        }

        .ticket-meta .meta-link:hover {
            color: var(--accent-dark);
        }

        @media (max-width: 767.98px) {
            .ticket-list {
                grid-template-columns: 1fr;
            }
        }

        /* ============ PAGINATION ============ */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            margin-top: 36px;
        }

        .pagination-ka .page-link {
            border: 1px solid var(--border-silver);
            color: var(--text-secondary);
            background: #fff;
            padding: 8px 14px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
            margin: 0 3px;
            transition: all var(--transition-fast);
        }

        .pagination-ka .page-link:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        .pagination-ka .page-item.active .page-link {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        .pagination-ka .page-item.disabled .page-link {
            color: var(--text-light);
            pointer-events: none;
            background: #fff;
            border-color: var(--border-light);
        }

        /* ============ PROCESS STEPS ============ */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .process-step {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            position: relative;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
        }

        .process-step:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .process-num {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 700;
            color: var(--border-silver);
            position: absolute;
            top: 16px;
            right: 20px;
            line-height: 1;
            letter-spacing: -0.02em;
        }

        .process-step h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 24px 0 8px;
            letter-spacing: -0.01em;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
        }

        @media (max-width: 991.98px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 575.98px) {
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============ FAQ ============ */
        .faq-section {
            background: #FFFFFF;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .accordion-ka .accordion-item {
            border: none;
            border-bottom: 1px solid var(--border-light);
            background: transparent;
            border-radius: 0;
        }

        .accordion-ka .accordion-item:last-child {
            border-bottom: none;
        }

        .accordion-ka .accordion-button {
            background: transparent;
            border: none;
            border-radius: 0;
            padding: 18px 0;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            box-shadow: none;
            transition: color var(--transition-fast);
            letter-spacing: -0.01em;
            position: relative;
        }

        .accordion-ka .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--accent);
            box-shadow: none;
        }

        .accordion-ka .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%235A5A5A' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
            transition: transform var(--transition-fast);
        }

        .accordion-ka .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%232F4D4A' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e");
        }

        .accordion-ka .accordion-button:focus {
            box-shadow: none;
            outline: none;
            border-color: transparent;
        }

        .accordion-ka .accordion-body {
            padding: 0 0 20px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.95;
            max-width: 72ch;
        }

        /* ============ CTA FORM ============ */
        .cta-section {
            padding: 64px 0;
        }

        .cta-panel {
            background: var(--bg-dark);
            border-radius: var(--radius-md);
            padding: 48px 52px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(47, 77, 74, 0.25), transparent 65%);
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: #fff;
        }

        .cta-panel .cta-desc {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 560px;
        }

        .form-ka .form-control {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            color: #fff;
            padding: 12px 16px;
            font-size: 0.9rem;
            height: auto;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            min-height: 48px;
        }

        .form-ka .form-control::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }

        .form-ka .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(47, 77, 74, 0.3);
            background: rgba(255, 255, 255, 0.08);
        }

        .form-ka .form-select {
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            color: #fff;
            padding: 12px 16px;
            font-size: 0.9rem;
            min-height: 48px;
            transition: border-color var(--transition-fast);
            cursor: pointer;
        }

        .form-ka .form-select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(47, 77, 74, 0.3);
        }

        .form-ka .form-select option {
            background: var(--bg-dark-soft);
            color: #fff;
        }

        .btn-ka-submit {
            background: #fff;
            color: var(--bg-dark);
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 700;
            cursor: pointer;
            transition: all var(--transition-base);
            letter-spacing: 0.03em;
            min-height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-ka-submit:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        @media (max-width: 767.98px) {
            .cta-panel {
                padding: 32px 24px;
            }
        }

        /* ============ RESPONSIVE STATS ============ */
        @media (max-width: 767.98px) {
            .stats-inner {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stat-item {
                padding: 10px 14px;
                border-left: none;
                border-bottom: 3px solid var(--border-silver);
            }
            .stat-item:hover {
                border-bottom-color: var(--accent);
                border-left: none;
            }
            .stat-value {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 575.98px) {
            .cat-hero {
                padding: 48px 0 40px;
            }
            .cat-hero h1 {
                font-size: 2rem;
            }
            .section-stand {
                padding: 40px 0;
            }
            .section-head {
                flex-direction: column;
                align-items: flex-start;
            }
            .filter-bar {
                padding: 12px 14px;
            }
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 56px 0 28px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            padding-right: 24px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }

        .footer-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }

        .footer-brand p {
            font-size: 0.82rem;
            line-height: 1.8;
            color: var(--text-muted);
            margin: 0;
            max-width: 320px;
        }

        .footer-col h6 {
            font-size: 0.78rem;
            font-weight: 700;
            color: #fff;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin: 0 0 14px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        .foot-links {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.72rem;
        }

        .foot-links a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .foot-links a:hover {
            color: #fff;
        }

        .foot-links span {
            color: rgba(255, 255, 255, 0.2);
        }

        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: span 2;
            }
        }

        @media (max-width: 575.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
                padding: 0 16px 24px;
            }
            .footer-brand {
                grid-column: span 1;
                padding-right: 0;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding: 16px 16px 0;
            }
        }

        /* ============ ANIMATIONS ============ */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in-up {
            animation: fadeInUp 0.5s ease-out both;
        }

        .fade-in-up.delay-1 {
            animation-delay: 0.1s;
        }
        .fade-in-up.delay-2 {
            animation-delay: 0.2s;
        }
        .fade-in-up.delay-3 {
            animation-delay: 0.3s;
        }
        .fade-in-up.delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: category5 */
:root {
            --bg-primary: #F5F3EE;
            --bg-secondary: #EDEAE3;
            --bg-dark: #1A1A1A;
            --bg-dark-soft: #242422;
            --text-primary: #1A1A1A;
            --text-secondary: #5A5A5A;
            --text-muted: #8A877F;
            --text-light: #C9C6C0;
            --border-light: #D8D5CF;
            --border-silver: #C9C6C0;
            --accent: #2F4D4A;
            --accent-dark: #1F3A38;
            --accent-soft: rgba(47, 77, 74, 0.08);
            --accent-focus: rgba(47, 77, 74, 0.12);
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --sidebar-width: 220px;
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            transition: transform var(--transition-base);
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 8px 20px 8px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

        .sidebar-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .sidebar-logo:hover {
            color: var(--text-primary);
        }

        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
            overflow-y: auto;
        }

        .sidebar-nav li {
            margin-bottom: 2px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .sidebar-nav a .nav-icon {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .sidebar-nav a:hover {
            color: var(--text-primary);
            background: var(--accent-soft);
            transform: translateX(2px);
            border-left-color: var(--accent);
        }

        .sidebar-nav a:hover .nav-icon {
            color: var(--accent);
        }

        .sidebar-nav a.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .sidebar-nav a.active .nav-icon {
            color: var(--accent);
        }

        .sidebar-footer-note {
            padding: 14px 8px 4px;
            border-top: 1px solid var(--border-light);
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
            letter-spacing: 0.04em;
        }

        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            z-index: 1035;
            align-items: center;
            padding: 0 16px;
            gap: 12px;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }

        .mobile-topbar .mobile-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .mobile-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }

        .mobile-menu-btn {
            margin-left: auto;
            background: none;
            border: none;
            font-size: 1.2rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 6px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .mobile-menu-btn:hover {
            background: var(--accent-soft);
        }

        .offcanvas {
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
        }

        .offcanvas .sidebar-nav a {
            font-size: 0.95rem;
            padding: 12px 16px;
        }

        .main-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
        }

        .page-section {
            padding: 72px 0;
        }

        .page-section-sm {
            padding: 48px 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--accent);
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
            max-width: 70ch;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 70ch;
            line-height: 1.9;
            margin-bottom: 32px;
        }

        .hero-dark {
            background: var(--bg-dark);
            color: #fff;
            padding: 80px 0 64px;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
        }

        .hero-dark::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.92) 0%, rgba(26, 26, 26, 0.75) 50%, rgba(31, 58, 56, 0.55) 100%);
            z-index: 1;
        }

        .hero-dark .hero-inner {
            position: relative;
            z-index: 2;
        }

        .hero-dark .hero-tagline {
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--text-light);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .hero-dark .hero-tagline .tag-badge {
            background: var(--accent);
            color: #fff;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.04em;
        }

        .hero-dark h1 {
            font-size: clamp(2rem, 5vw, 3.6rem);
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 20px;
            color: #fff;
            max-width: 18ch;
        }

        .hero-dark .hero-subtitle {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 55ch;
            line-height: 1.9;
            margin-bottom: 28px;
        }

        .hero-dark .hero-metrics {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .hero-dark .hero-metric {
            text-align: left;
        }

        .hero-dark .hero-metric .metric-num {
            font-family: var(--font-mono);
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
        }

        .hero-dark .hero-metric .metric-label {
            font-size: 0.8rem;
            color: var(--text-light);
            letter-spacing: 0.04em;
            margin-top: 4px;
        }

        .data-strip {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-top: -32px;
            position: relative;
            z-index: 10;
            box-shadow: var(--shadow-sm);
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            align-items: center;
        }

        .data-strip .strip-item {
            display: flex;
            align-items: center;
            gap: 12px;
            flex: 1;
            min-width: 160px;
        }

        .data-strip .strip-icon {
            width: 40px;
            height: 40px;
            background: var(--accent-soft);
            color: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .data-strip .strip-num {
            font-family: var(--font-mono);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }

        .data-strip .strip-label {
            font-size: 0.78rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        .promo-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .promo-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .promo-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }

        .promo-card .promo-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background-color: var(--bg-secondary);
        }

        .promo-card .promo-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
            filter: grayscale(20%);
        }

        .promo-card:hover .promo-image img {
            transform: scale(1.02);
            filter: grayscale(0%);
        }

        .promo-card .promo-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            padding: 4px 10px;
            border-radius: 50px;
            z-index: 2;
        }

        .promo-card .promo-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .promo-card .promo-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }

        .promo-card .promo-tag {
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 3px 10px;
            border-radius: 50px;
        }

        .promo-card .promo-title {
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .promo-card .promo-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            flex: 1;
        }

        .promo-card .promo-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.75rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }

        .promo-card .promo-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .promo-card .promo-meta i {
            font-size: 0.7rem;
        }

        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            margin-bottom: 28px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-light);
        }

        .filter-bar .filter-label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.04em;
        }

        .filter-bar .filter-btn {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }

        .filter-bar .filter-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        .filter-bar .filter-btn.active {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            font-weight: 600;
        }

        .filter-bar .sort-select {
            margin-left: auto;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 6px 12px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            background: #FFFFFF;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .filter-bar .sort-select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-focus);
        }

        .pagination-wrap {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
        }

        .pagination-wrap .page-btn {
            width: 36px;
            height: 36px;
            border: 1px solid var(--border-light);
            background: #FFFFFF;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .pagination-wrap .page-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .pagination-wrap .page-btn.active {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            font-weight: 700;
        }

        .pagination-wrap .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        .faq-wrap .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border-light);
            border-radius: 0;
        }

        .faq-wrap .accordion-button {
            background: transparent;
            border: none;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 20px 0;
            letter-spacing: -0.01em;
            box-shadow: none;
            transition: color var(--transition-fast);
        }

        .faq-wrap .accordion-button:not(.collapsed) {
            color: var(--accent);
            background: transparent;
            border-left: 3px solid var(--accent);
            padding-left: 16px;
        }

        .faq-wrap .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }

        .faq-wrap .accordion-button::after {
            width: 16px;
            height: 16px;
            background-size: 16px;
            transition: transform var(--transition-fast);
        }

        .faq-wrap .accordion-body {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.9;
            padding: 0 0 20px 16px;
            border-left: 3px solid transparent;
        }

        .cta-panel {
            background: var(--bg-dark);
            color: #fff;
            border-radius: var(--radius-md);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
        }

        .cta-panel::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.92) 0%, rgba(26, 26, 26, 0.78) 60%, rgba(31, 58, 56, 0.65) 100%);
            z-index: 1;
        }

        .cta-panel .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-panel h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-panel p {
            color: rgba(255, 255, 255, 0.75);
            max-width: 55ch;
            line-height: 1.9;
            margin-bottom: 24px;
        }

        .cta-panel .form-control {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 0.9rem;
            height: 48px;
            transition: all var(--transition-fast);
        }

        .cta-panel .form-control::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .cta-panel .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-focus);
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .cta-panel .form-select {
            background-color: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            border-radius: var(--radius-sm);
            height: 48px;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .cta-panel .form-select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-focus);
            background-color: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .cta-panel .form-select option {
            color: var(--text-primary);
            background: #fff;
        }

        .cta-panel .btn-submit {
            background: #fff;
            color: var(--text-primary);
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            cursor: pointer;
            transition: all var(--transition-fast);
            height: 48px;
        }

        .cta-panel .btn-submit:hover {
            background: var(--accent);
            color: #fff;
        }

        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 56px 0 28px;
            margin-top: 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .site-footer .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand .footer-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--accent);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }

        .site-footer .footer-brand p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 40ch;
        }

        .site-footer .footer-col h6 {
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: #fff;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }

        .site-footer .footer-col ul li a {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .site-footer .footer-col ul li a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        .site-footer .footer-bottom .foot-links {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .site-footer .footer-bottom .foot-links a {
            color: var(--text-muted);
            font-size: 0.72rem;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-bottom .foot-links a:hover {
            color: #fff;
        }

        @media (max-width: 992px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar {
                display: none;
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            .hero-dark {
                padding: 56px 0 48px;
            }
            .promo-grid {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .data-strip {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 768px) {
            .page-section {
                padding: 48px 0;
            }
            .hero-dark h1 {
                font-size: 1.8rem;
            }
            .hero-dark .hero-metrics {
                gap: 20px;
            }
            .hero-dark .hero-metric .metric-num {
                font-size: 1.3rem;
            }
            .filter-bar .sort-select {
                margin-left: 0;
                width: 100%;
            }
            .cta-panel {
                padding: 32px 24px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 576px) {
            .hero-dark {
                padding: 40px 0 36px;
            }
            .hero-dark h1 {
                font-size: 1.5rem;
            }
            .hero-dark .hero-subtitle {
                font-size: 0.95rem;
            }
            .data-strip {
                padding: 16px;
                gap: 16px;
            }
            .promo-card .promo-body {
                padding: 16px 18px 20px;
            }
            .faq-wrap .accordion-button {
                font-size: 0.95rem;
                padding: 16px 0;
            }
        }

/* roulang page: category6 */
:root {
      --bg-primary: #F5F3EE;
      --bg-secondary: #EDEAE3;
      --bg-dark: #1A1A1A;
      --bg-dark-soft: #242422;
      --text-primary: #1A1A1A;
      --text-secondary: #5A5A5A;
      --text-muted: #8A877F;
      --text-light: #C9C6C0;
      --border-light: #D8D5CF;
      --border-silver: #C9C6C0;
      --accent: #2F4D4A;
      --accent-dark: #1F3A38;
      --accent-soft: rgba(47, 77, 74, 0.08);
      --accent-focus: rgba(47, 77, 74, 0.12);
      --radius-sm: 2px;
      --radius-md: 4px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
      --sidebar-width: 220px;
      --transition-fast: 160ms ease-out;
      --transition-base: 200ms ease-out;
      --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.85;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: var(--text-primary);
      text-decoration: none;
      transition: color var(--transition-fast);
    }
    a:hover {
      color: var(--accent);
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
      border-radius: var(--radius-sm);
    }

    /* ============ 主内容布局 ============ */
    .main-content {
      margin-left: var(--sidebar-width);
      min-height: 100vh;
      padding-bottom: 0;
      transition: margin-left var(--transition-base);
    }
    .page-inner {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 48px;
      padding-right: 48px;
    }

    /* ============ SIDEBAR NAV ============ */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: var(--sidebar-width);
      height: 100vh;
      background: #FFFFFF;
      border-right: 1px solid var(--border-light);
      z-index: 1040;
      display: flex;
      flex-direction: column;
      padding: 24px 16px;
      transition: transform var(--transition-base);
    }
    .sidebar-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 8px 20px 8px;
      border-bottom: 1px solid var(--border-light);
      margin-bottom: 16px;
      font-weight: 800;
      font-size: 1.3rem;
      letter-spacing: -0.02em;
      color: var(--text-primary);
    }
    .sidebar-logo .logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: var(--accent);
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
      flex-shrink: 0;
    }
    .sidebar-logo:hover {
      color: var(--text-primary);
    }
    .sidebar-nav {
      list-style: none;
      padding: 0;
      margin: 0;
      flex: 1;
      overflow-y: auto;
    }
    .sidebar-nav li {
      margin-bottom: 2px;
    }
    .sidebar-nav a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 12px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-secondary);
      border-radius: var(--radius-sm);
      border-left: 3px solid transparent;
      transition: all var(--transition-fast);
      letter-spacing: 0.01em;
    }
    .sidebar-nav a .nav-icon {
      width: 18px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-muted);
      flex-shrink: 0;
      transition: color var(--transition-fast);
    }
    .sidebar-nav a:hover {
      color: var(--text-primary);
      background: var(--accent-soft);
      transform: translateX(2px);
      border-left-color: var(--accent);
    }
    .sidebar-nav a:hover .nav-icon {
      color: var(--accent);
    }
    .sidebar-nav a.active {
      color: var(--accent);
      background: var(--accent-soft);
      border-left-color: var(--accent);
      font-weight: 600;
    }
    .sidebar-nav a.active .nav-icon {
      color: var(--accent);
    }
    .sidebar-footer-note {
      padding: 14px 8px 4px;
      border-top: 1px solid var(--border-light);
      font-size: 0.7rem;
      color: var(--text-muted);
      text-align: center;
      letter-spacing: 0.04em;
      line-height: 1.6;
    }

    /* ============ MOBILE TOPBAR ============ */
    .mobile-topbar {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 56px;
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-light);
      z-index: 1035;
      align-items: center;
      padding: 0 16px;
      gap: 12px;
      box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
    }
    .mobile-topbar .mobile-logo {
      font-weight: 800;
      font-size: 1.1rem;
      color: var(--text-primary);
      letter-spacing: -0.02em;
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 1;
    }
    .mobile-topbar .mobile-logo .logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 30px;
      height: 30px;
      background: var(--accent);
      color: #fff;
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
    }
    .mobile-toggle {
      background: none;
      border: none;
      font-size: 1.3rem;
      color: var(--text-primary);
      cursor: pointer;
      padding: 6px 10px;
      transition: color var(--transition-fast);
    }
    .mobile-toggle:hover {
      color: var(--accent);
    }

    /* ============ OFFCANVAS SIDEBAR ============ */
    .offcanvas-sidebar {
      width: 260px !important;
      background: #FFFFFF;
      border-right: 1px solid var(--border-light);
    }
    .offcanvas-sidebar .offcanvas-body {
      padding: 20px 16px;
      display: flex;
      flex-direction: column;
    }
    .offcanvas-sidebar .sidebar-nav {
      flex: 1;
    }
    .offcanvas-sidebar .sidebar-logo {
      border-bottom: 1px solid var(--border-light);
      padding-bottom: 16px;
      margin-bottom: 12px;
    }
    .offcanvas-sidebar .sidebar-footer-note {
      margin-top: auto;
      padding-top: 14px;
    }

    /* ============ HERO ============ */
    .hero-banner {
      position: relative;
      background-color: var(--bg-secondary);
      background-image: linear-gradient(to bottom, rgba(25, 25, 25, 0.68), rgba(25, 25, 25, 0.45)), url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center 30%;
      color: #FFFFFF;
      padding: 56px 0 72px 0;
      margin-bottom: 0;
    }
    .hero-banner .hero-inner {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 48px;
      padding-right: 48px;
    }
    .hero-banner .hero-tag {
      display: inline-block;
      background: rgba(255, 255, 255, 0.14);
      border: 1px solid rgba(255, 255, 255, 0.28);
      color: #FFFFFF;
      font-size: 0.8rem;
      font-weight: 500;
      padding: 6px 16px;
      border-radius: 2px;
      letter-spacing: 0.08em;
      margin-bottom: 18px;
      backdrop-filter: blur(4px);
    }
    .hero-banner h1 {
      font-size: 2.9rem;
      font-weight: 800;
      letter-spacing: -0.03em;
      line-height: 1.2;
      margin-bottom: 16px;
      color: #FFFFFF;
      max-width: 700px;
    }
    .hero-banner .hero-sub {
      font-size: 1.05rem;
      color: rgba(255, 255, 255, 0.85);
      line-height: 1.85;
      max-width: 620px;
      margin-bottom: 26px;
      font-weight: 400;
    }
    .hero-banner .hero-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }
    .btn-outline-light-custom {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.5);
      color: #FFFFFF;
      padding: 10px 22px;
      font-weight: 500;
      font-size: 0.9rem;
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
    }
    .btn-outline-light-custom:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #FFFFFF;
      color: #FFFFFF;
    }

    /* ============ 通用按钮 ============ */
    .btn-custom-dark {
      background: var(--bg-dark);
      color: #FFFFFF;
      border: 1px solid var(--bg-dark);
      padding: 10px 22px;
      font-weight: 500;
      font-size: 0.9rem;
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
      cursor: pointer;
      letter-spacing: 0.02em;
    }
    .btn-custom-dark:hover {
      background: var(--accent);
      border-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-custom-accent {
      background: var(--accent);
      color: #FFFFFF;
      border: 1px solid var(--accent);
      padding: 10px 22px;
      font-weight: 500;
      font-size: 0.9rem;
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
      cursor: pointer;
      letter-spacing: 0.02em;
    }
    .btn-custom-accent:hover {
      background: var(--accent-dark);
      border-color: var(--accent-dark);
      color: #FFFFFF;
    }

    /* ============ 数据摘要条 ============ */
    .stat-strip {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-light);
      padding: 24px 0;
    }
    .stat-strip .stat-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 48px;
      padding-right: 48px;
    }
    .stat-strip .stat-item {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .stat-strip .stat-icon {
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      background: var(--accent-soft);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      flex-shrink: 0;
    }
    .stat-strip .stat-info .stat-label {
      font-size: 0.78rem;
      color: var(--text-muted);
      letter-spacing: 0.04em;
      margin-bottom: 2px;
    }
    .stat-strip .stat-info .stat-value {
      font-family: var(--font-mono);
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-primary);
      line-height: 1.3;
    }
    .stat-strip .stat-info .stat-trend {
      font-size: 0.75rem;
      color: var(--accent);
      display: flex;
      align-items: center;
      gap: 4px;
    }

    /* ============ 板块通用 ============ */
    .section-block {
      padding: 64px 0;
    }
    .section-block.alt-bg {
      background: var(--bg-secondary);
    }
    .section-block .section-label {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 10px;
      border-left: 3px solid var(--accent);
      padding-left: 10px;
    }
    .section-block .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
      color: var(--text-primary);
      line-height: 1.35;
    }
    .section-block .section-desc {
      font-size: 0.95rem;
      color: var(--text-secondary);
      max-width: 680px;
      line-height: 1.85;
      margin-bottom: 36px;
    }

    /* ============ 不对称栅格卡片 ============ */
    .asym-grid {
      display: grid;
      grid-template-columns: 1.3fr 0.7fr;
      gap: 20px;
    }
    .asym-grid .grid-col {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all var(--transition-base);
      position: relative;
      overflow: hidden;
    }
    .feature-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .feature-card.tall {
      min-height: 340px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .feature-card .card-tag {
      display: inline-block;
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.06em;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 4px 12px;
      border-radius: 2px;
      margin-bottom: 14px;
    }
    .feature-card .card-title {
      font-size: 1.3rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      margin-bottom: 10px;
      color: var(--text-primary);
      line-height: 1.4;
    }
    .feature-card .card-desc {
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 16px;
    }
    .feature-card .card-meta {
      display: flex;
      align-items: center;
      gap: 16px;
      font-size: 0.78rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-light);
      padding-top: 14px;
      margin-top: auto;
    }
    .feature-card .card-meta .meta-sep {
      color: var(--border-silver);
    }
    .feature-card .card-img-wrap {
      width: 100%;
      aspect-ratio: 16/10;
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 14px;
      background: var(--bg-secondary);
    }
    .feature-card .card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(25%) saturate(0.9);
      transition: transform var(--transition-base), filter var(--transition-base);
    }
    .feature-card:hover .card-img-wrap img {
      transform: scale(1.03);
      filter: grayscale(10%) saturate(1);
    }
    .feature-card .card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--accent);
      margin-top: 6px;
      transition: gap var(--transition-fast);
    }
    .feature-card .card-link:hover {
      gap: 10px;
      color: var(--accent-dark);
    }

    /* ============ 筛选排序条 ============ */
    .filter-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      padding: 16px 0;
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
      margin-bottom: 28px;
    }
    .filter-bar .filter-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .filter-tag {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      color: var(--text-secondary);
      font-size: 0.8rem;
      padding: 6px 14px;
      border-radius: 2px;
      cursor: pointer;
      transition: all var(--transition-fast);
      font-weight: 500;
    }
    .filter-tag:hover {
      border-color: var(--accent);
      color: var(--accent);
    }
    .filter-tag.active {
      background: var(--accent);
      border-color: var(--accent);
      color: #FFFFFF;
    }
    .filter-sort {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .filter-sort select {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: 2px;
      padding: 6px 12px;
      font-size: 0.8rem;
      color: var(--text-primary);
      cursor: pointer;
      transition: border-color var(--transition-fast);
    }
    .filter-sort select:focus {
      border-color: var(--accent);
      outline: none;
    }

    /* ============ 活动列表卡片 ============ */
    .activity-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .activity-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all var(--transition-base);
      display: flex;
      flex-direction: column;
    }
    .activity-item:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .activity-item .activity-img {
      aspect-ratio: 16/9;
      overflow: hidden;
      background: var(--bg-secondary);
      position: relative;
    }
    .activity-item .activity-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(20%) saturate(0.92);
      transition: transform var(--transition-base), filter var(--transition-base);
    }
    .activity-item:hover .activity-img img {
      transform: scale(1.02);
      filter: grayscale(5%) saturate(1);
    }
    .activity-item .activity-img .badge-overlay {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(26, 26, 26, 0.78);
      color: #FFFFFF;
      font-size: 0.7rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 2px;
      letter-spacing: 0.04em;
    }
    .activity-item .activity-body {
      padding: 18px 20px 16px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .activity-item .activity-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 10px;
    }
    .activity-item .activity-tags .mini-tag {
      font-size: 0.68rem;
      font-weight: 600;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 2px 10px;
      border-radius: 2px;
      letter-spacing: 0.04em;
    }
    .activity-item .activity-title {
      font-size: 1.05rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      color: var(--text-primary);
      margin-bottom: 8px;
      line-height: 1.45;
    }
    .activity-item .activity-desc {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 14px;
      flex: 1;
    }
    .activity-item .activity-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 0.75rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-light);
      padding-top: 12px;
    }
    .activity-item .activity-meta .meta-item {
      display: flex;
      align-items: center;
      gap: 5px;
    }
    .activity-item .activity-meta .meta-item i {
      font-size: 0.7rem;
      color: var(--accent);
    }

    /* ============ 分页 ============ */
    .pagination-wrap {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 32px 0 8px;
    }
    .pagination-wrap .page-btn {
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      color: var(--text-secondary);
      cursor: pointer;
      transition: all var(--transition-fast);
      font-weight: 500;
    }
    .pagination-wrap .page-btn:hover {
      border-color: var(--accent);
      color: var(--accent);
    }
    .pagination-wrap .page-btn.active {
      background: var(--accent);
      border-color: var(--accent);
      color: #FFFFFF;
    }
    .pagination-wrap .page-btn.dots {
      border: none;
      background: transparent;
      cursor: default;
    }

    /* ============ 步骤流程 ============ */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      counter-reset: stepCounter;
    }
    .step-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 22px 18px;
      text-align: left;
      transition: all var(--transition-base);
      position: relative;
    }
    .step-item:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-sm);
    }
    .step-item::before {
      counter-increment: stepCounter;
      content: counter(stepCounter, decimal-leading-zero);
      font-family: var(--font-mono);
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--accent);
      display: block;
      margin-bottom: 10px;
      letter-spacing: 0.04em;
    }
    .step-item .step-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 6px;
      line-height: 1.4;
    }
    .step-item .step-desc {
      font-size: 0.8rem;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ============ FAQ ============ */
    .faq-accordion .accordion-item {
      background: transparent;
      border: none;
      border-radius: 0;
      border-top: 1px solid var(--border-light);
    }
    .faq-accordion .accordion-item:last-child {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-accordion .accordion-button {
      background: transparent;
      border: none;
      box-shadow: none;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-primary);
      padding: 18px 0;
      border-radius: 0;
      letter-spacing: -0.01em;
      transition: color var(--transition-fast);
    }
    .faq-accordion .accordion-button:not(.collapsed) {
      color: var(--accent);
      background: transparent;
      box-shadow: none;
      border-left: 3px solid var(--accent);
      padding-left: 14px;
    }
    .faq-accordion .accordion-button:focus {
      box-shadow: none;
      border-color: transparent;
    }
    .faq-accordion .accordion-button::after {
      background-size: 1.1rem;
      transition: transform var(--transition-fast);
      filter: invert(0.4);
    }
    .faq-accordion .accordion-body {
      padding: 4px 0 20px 0;
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.85;
    }

    /* ============ 转化表单 ============ */
    .cta-block {
      background: var(--bg-dark);
      padding: 64px 0;
      color: #FFFFFF;
    }
    .cta-block .cta-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .cta-block .cta-info .cta-label {
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.12em;
      color: var(--text-light);
      margin-bottom: 10px;
      text-transform: uppercase;
    }
    .cta-block .cta-info .cta-title {
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
      color: #FFFFFF;
      line-height: 1.35;
    }
    .cta-block .cta-info .cta-desc {
      font-size: 0.95rem;
      color: rgba(255, 255, 255, 0.75);
      line-height: 1.85;
      max-width: 420px;
    }
    .cta-form-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 28px;
      color: var(--text-primary);
      box-shadow: var(--shadow-md);
    }
    .cta-form-card .form-group {
      margin-bottom: 16px;
    }
    .cta-form-card label {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 6px;
      display: block;
      letter-spacing: 0.02em;
    }
    .cta-form-card .form-control {
      height: 48px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      padding: 0 14px;
      color: var(--text-primary);
      background: var(--bg-primary);
      transition: all var(--transition-fast);
    }
    .cta-form-card .form-control:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(47, 77, 74, 0.12);
      background: #FFFFFF;
    }
    .cta-form-card textarea.form-control {
      height: auto;
      min-height: 88px;
      padding: 12px 14px;
      resize: vertical;
    }
    .cta-form-card .btn-submit {
      width: 100%;
      background: var(--bg-dark);
      color: #FFFFFF;
      border: none;
      height: 48px;
      font-size: 0.95rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
      cursor: pointer;
    }
    .cta-form-card .btn-submit:hover {
      background: var(--accent);
      color: #FFFFFF;
    }

    /* ============ 页脚 ============ */
    .site-footer {
      background: var(--bg-dark);
      color: var(--text-light);
      padding: 56px 0 28px;
      margin-left: var(--sidebar-width);
    }
    .site-footer .footer-grid {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 48px;
      padding-right: 48px;
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }
    .site-footer .footer-brand .footer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.2rem;
      color: #FFFFFF;
      margin-bottom: 14px;
      letter-spacing: -0.02em;
    }
    .site-footer .footer-brand .footer-logo .logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      background: var(--accent);
      color: #fff;
      font-size: 0.9rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
    }
    .site-footer .footer-brand p {
      font-size: 0.82rem;
      color: rgba(255, 255, 255, 0.6);
      line-height: 1.8;
      max-width: 340px;
    }
    .site-footer .footer-col h6 {
      font-size: 0.78rem;
      font-weight: 700;
      color: #FFFFFF;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 14px;
    }
    .site-footer .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .site-footer .footer-col ul li {
      margin-bottom: 8px;
    }
    .site-footer .footer-col ul li a {
      font-size: 0.82rem;
      color: rgba(255, 255, 255, 0.6);
      transition: color var(--transition-fast);
    }
    .site-footer .footer-col ul li a:hover {
      color: #FFFFFF;
    }
    .site-footer .footer-bottom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 48px;
      padding-right: 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding-top: 22px;
      font-size: 0.75rem;
      color: rgba(255, 255, 255, 0.45);
    }
    .site-footer .footer-bottom .foot-links {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-footer .footer-bottom .foot-links a {
      color: rgba(255, 255, 255, 0.6);
      font-size: 0.75rem;
      transition: color var(--transition-fast);
    }
    .site-footer .footer-bottom .foot-links a:hover {
      color: #FFFFFF;
    }
    .site-footer .footer-bottom .foot-links span {
      color: rgba(255, 255, 255, 0.25);
    }

    /* ============ 响应式 ============ */
    @media (max-width: 992px) {
      :root {
        --sidebar-width: 0px;
      }
      .sidebar {
        transform: translateX(-100%);
        width: 220px;
      }
      .mobile-topbar {
        display: flex;
      }
      .main-content {
        margin-left: 0;
        padding-top: 56px;
      }
      .site-footer {
        margin-left: 0;
      }
      .hero-banner {
        padding: 40px 0 56px 0;
      }
      .hero-banner h1 {
        font-size: 2.2rem;
      }
      .hero-banner .hero-inner,
      .page-inner,
      .stat-strip .stat-grid,
      .site-footer .footer-grid,
      .site-footer .footer-bottom {
        padding-left: 24px;
        padding-right: 24px;
      }
      .asym-grid {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .cta-block .cta-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .site-footer .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .section-block {
        padding: 48px 0;
      }
    }
    @media (max-width: 768px) {
      .activity-list {
        grid-template-columns: 1fr;
      }
      .stat-strip .stat-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-banner h1 {
        font-size: 1.8rem;
      }
      .hero-banner .hero-sub {
        font-size: 0.9rem;
      }
      .section-block .section-title {
        font-size: 1.5rem;
      }
      .filter-bar {
        flex-direction: column;
        align-items: flex-start;
      }
      .filter-bar .filter-sort {
        width: 100%;
      }
      .filter-bar .filter-sort select {
        flex: 1;
      }
      .site-footer .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
    }
    @media (max-width: 576px) {
      .stat-strip .stat-grid {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .hero-banner {
        padding: 32px 0 44px 0;
      }
      .hero-banner h1 {
        font-size: 1.5rem;
      }
      .hero-banner .hero-inner,
      .page-inner,
      .stat-strip .stat-grid,
      .site-footer .footer-grid,
      .site-footer .footer-bottom {
        padding-left: 16px;
        padding-right: 16px;
      }
      .section-block {
        padding: 36px 0;
      }
      .cta-form-card {
        padding: 18px;
      }
      .activity-item .activity-body {
        padding: 14px 16px 12px;
      }
      .pagination-wrap .page-btn {
        width: 32px;
        height: 32px;
        font-size: 0.78rem;
      }
    }

/* roulang page: category7 */
:root {
            --bg-primary: #F5F3EE;
            --bg-secondary: #EDEAE3;
            --bg-dark: #1A1A1A;
            --bg-dark-soft: #242422;
            --text-primary: #1A1A1A;
            --text-secondary: #5A5A5A;
            --text-muted: #8A877F;
            --text-light: #C9C6C0;
            --border-light: #D8D5CF;
            --border-silver: #C9C6C0;
            --accent: #2F4D4A;
            --accent-dark: #1F3A38;
            --accent-soft: rgba(47, 77, 74, 0.08);
            --accent-focus: rgba(47, 77, 74, 0.12);
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --sidebar-width: 220px;
            --transition-fast: 160ms ease-out;
            --transition-base: 200ms ease-out;
            --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'Roboto Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.85;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #FFFFFF;
            border-right: 1px solid var(--border-light);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 24px 16px;
            transition: transform var(--transition-base);
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 8px 20px 8px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 16px;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }
        .sidebar-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .sidebar-logo:hover {
            color: var(--text-primary);
        }
        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
            overflow-y: auto;
        }
        .sidebar-nav li {
            margin-bottom: 2px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }
        .sidebar-nav a .nav-icon {
            width: 18px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .sidebar-nav a:hover {
            color: var(--text-primary);
            background: var(--accent-soft);
            transform: translateX(2px);
            border-left-color: var(--accent);
        }
        .sidebar-nav a:hover .nav-icon {
            color: var(--accent);
        }
        .sidebar-nav a.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left-color: var(--accent);
            font-weight: 600;
        }
        .sidebar-nav a.active .nav-icon {
            color: var(--accent);
        }
        .sidebar-footer-note {
            padding: 14px 8px 4px;
            border-top: 1px solid var(--border-light);
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
            letter-spacing: 0.04em;
        }
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-light);
            z-index: 1035;
            align-items: center;
            padding: 0 16px;
            gap: 12px;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }
        .mobile-topbar .mobile-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .mobile-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }
        .mobile-topbar .btn-menu {
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--text-primary);
            padding: 6px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
        }
        .mobile-topbar .btn-menu:hover {
            background: var(--accent-soft);
            color: var(--accent);
        }
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .category-hero {
            position: relative;
            background: var(--bg-dark);
            color: #fff;
            padding: 72px 0 56px;
            overflow: hidden;
        }
        .category-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.3;
            z-index: 0;
        }
        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,26,0.88) 0%, rgba(47,77,74,0.72) 100%);
            z-index: 1;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            color: rgba(255,255,255,0.85);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 16px;
        }
        .category-hero h1 {
            font-size: clamp(2.1rem, 4vw, 3.2rem);
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin: 0 0 16px;
            color: #fff;
        }
        .category-hero .hero-sub {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.75);
            max-width: 680px;
            line-height: 1.9;
            margin-bottom: 28px;
        }
        .hero-metrics {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .hero-metric {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            backdrop-filter: blur(4px);
        }
        .hero-metric .metric-label {
            font-size: 0.75rem;
            color: rgba(255,255,255,0.55);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 6px;
        }
        .hero-metric .metric-value {
            font-family: var(--font-mono);
            font-size: 1.7rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
        }
        .hero-metric .metric-trend {
            font-size: 0.72rem;
            color: #8BBDB8;
            display: flex;
            align-items: center;
            gap: 4px;
            margin-top: 4px;
        }
        .security-summary {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin: 28px 0 8px;
        }
        .security-summary .summary-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(47,77,74,0.12);
            color: var(--accent);
            font-size: 0.82rem;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid rgba(47,77,74,0.2);
        }
        .security-summary .summary-pill i {
            font-size: 0.72rem;
        }
        .section-block {
            padding: 64px 0;
        }
        .section-block.bg-alternate {
            background: var(--bg-secondary);
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header .section-label {
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 8px;
        }
        .section-header h2 {
            font-size: clamp(1.6rem, 2.5vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin: 0;
            line-height: 1.3;
        }
        .section-header .section-desc {
            color: var(--text-secondary);
            font-size: 0.98rem;
            max-width: 620px;
            margin-top: 10px;
            line-height: 1.85;
        }
        .security-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 24px;
        }
        .security-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            transition: all var(--transition-base);
        }
        .security-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .security-card .card-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .security-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin: 0 0 6px;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }
        .security-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.8;
        }
        .security-card .card-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 2px 10px;
            border-radius: 12px;
            margin-bottom: 8px;
            letter-spacing: 0.05em;
        }
        .threat-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
        }
        .threat-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            background: var(--bg-primary);
            border-left: 3px solid var(--border-silver);
            transition: all var(--transition-fast);
        }
        .threat-item:hover {
            border-left-color: var(--accent);
            background: var(--accent-soft);
        }
        .threat-item .threat-num {
            font-family: var(--font-mono);
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--accent);
            width: 28px;
            text-align: center;
            flex-shrink: 0;
        }
        .threat-item .threat-info h4 {
            font-size: 0.92rem;
            font-weight: 600;
            margin: 0 0 2px;
            color: var(--text-primary);
        }
        .threat-item .threat-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .comparison-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .comparison-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 30px;
            transition: all var(--transition-base);
        }
        .comparison-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
        }
        .comparison-card .comp-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border-light);
        }
        .comparison-card .comp-header .comp-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .comparison-card.standard .comp-icon {
            background: #E8E5DF;
            color: var(--text-muted);
        }
        .comparison-card.enhanced .comp-icon {
            background: var(--accent-soft);
            color: var(--accent);
        }
        .comparison-card .comp-header h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0;
            color: var(--text-primary);
        }
        .comparison-card .comp-header .comp-badge {
            font-size: 0.68rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            padding: 3px 10px;
            border-radius: 12px;
            text-transform: uppercase;
        }
        .comparison-card.standard .comp-badge {
            background: #E8E5DF;
            color: var(--text-muted);
        }
        .comparison-card.enhanced .comp-badge {
            background: var(--accent);
            color: #fff;
        }
        .comp-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .comp-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--bg-secondary);
        }
        .comp-list li:last-child {
            border-bottom: none;
        }
        .comp-list li .comp-dot {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.6rem;
            margin-top: 4px;
        }
        .comparison-card.standard .comp-dot {
            background: #E8E5DF;
            color: var(--text-muted);
        }
        .comparison-card.enhanced .comp-dot {
            background: var(--accent);
            color: #fff;
        }
        .comparison-card.standard .comp-list li {
            color: var(--text-muted);
        }
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }
        .flow-step {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            position: relative;
            counter-increment: step-counter;
            transition: all var(--transition-base);
        }
        .flow-step:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .flow-step::before {
            content: counter(step-counter, decimal-leading-zero);
            font-family: var(--font-mono);
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent);
            display: block;
            margin-bottom: 12px;
            letter-spacing: 0.06em;
        }
        .flow-step h4 {
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--text-primary);
        }
        .flow-step p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.75;
        }
        .faq-wrap .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border-silver);
            border-radius: 0;
        }
        .faq-wrap .accordion-button {
            background: transparent;
            border: none;
            box-shadow: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 20px 16px 20px 4px;
            letter-spacing: -0.01em;
        }
        .faq-wrap .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--accent);
            border-left: 3px solid var(--accent);
            padding-left: 14px;
        }
        .faq-wrap .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }
        .faq-wrap .accordion-body {
            padding: 0 16px 20px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.85;
            border-left: 3px solid var(--accent-soft);
            margin-left: 4px;
        }
        .cta-panel {
            background: var(--bg-dark);
            border-radius: var(--radius-md);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cta-panel .cta-info h2 {
            color: #fff;
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin: 0 0 12px;
        }
        .cta-panel .cta-info p {
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            line-height: 1.9;
            margin: 0;
        }
        .cta-panel .cta-info .cta-highlights {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 18px;
        }
        .cta-panel .cta-info .cta-highlights span {
            font-size: 0.78rem;
            color: #8BBDB8;
            background: rgba(47,77,74,0.2);
            padding: 5px 12px;
            border-radius: 16px;
            border: 1px solid rgba(47,77,74,0.3);
        }
        .cta-form-wrap {
            background: var(--bg-dark-soft);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md);
            padding: 28px;
        }
        .cta-form-wrap .form-label {
            color: rgba(255,255,255,0.7);
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.04em;
        }
        .cta-form-wrap .form-control,
        .cta-form-wrap .form-select {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.15);
            color: #fff;
            border-radius: var(--radius-sm);
            height: 48px;
            font-size: 0.92rem;
            transition: all var(--transition-fast);
        }
        .cta-form-wrap .form-control:focus,
        .cta-form-wrap .form-select:focus {
            background: rgba(255,255,255,0.08);
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(47,77,74,0.3);
            color: #fff;
        }
        .cta-form-wrap .form-control::placeholder {
            color: rgba(255,255,255,0.35);
        }
        .cta-form-wrap .form-select option {
            background: var(--bg-dark-soft);
            color: #fff;
        }
        .btn-primary-custom {
            background: #fff;
            color: var(--text-primary);
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.04em;
            transition: all var(--transition-base);
            width: 100%;
            height: 48px;
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            background: var(--accent);
            color: #fff;
        }
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
        }
        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.8;
            color: rgba(255,255,255,0.5);
            max-width: 320px;
            margin: 0;
        }
        .footer-col h6 {
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            margin: 0 0 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.5);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #8BBDB8;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.72rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom .foot-links {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .footer-bottom .foot-links a {
            color: rgba(255,255,255,0.4);
            font-size: 0.72rem;
        }
        .footer-bottom .foot-links a:hover {
            color: #8BBDB8;
        }
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 28px;
        }
        .filter-bar .filter-label {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.05em;
        }
        .filter-bar .filter-group {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-bar .filter-btn {
            background: #fff;
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            font-size: 0.8rem;
            padding: 6px 14px;
            border-radius: 20px;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .filter-bar .filter-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .filter-bar .filter-btn.active {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }
        @media (max-width: 991.98px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 240px;
                top: 0;
                z-index: 1050;
            }
            .sidebar.show {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }
            .container-custom {
                padding: 0 20px;
            }
            .security-grid {
                grid-template-columns: 1fr;
            }
            .comparison-section {
                grid-template-columns: 1fr;
            }
            .flow-steps {
                grid-template-columns: 1fr 1fr;
            }
            .cta-panel {
                grid-template-columns: 1fr;
                padding: 32px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .hero-metrics {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767.98px) {
            .category-hero {
                padding: 50px 0 40px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .hero-metrics {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .hero-metric {
                padding: 12px 14px;
            }
            .hero-metric .metric-value {
                font-size: 1.3rem;
            }
            .security-card {
                padding: 20px;
                flex-direction: column;
                gap: 12px;
            }
            .flow-steps {
                grid-template-columns: 1fr;
            }
            .section-block {
                padding: 44px 0;
            }
            .cta-panel {
                padding: 24px 18px;
            }
            .cta-form-wrap {
                padding: 20px 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 575.98px) {
            .container-custom {
                padding: 0 14px;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .hero-sub {
                font-size: 0.9rem;
            }
            .hero-metrics {
                grid-template-columns: 1fr;
            }
            .security-summary {
                gap: 8px;
            }
            .security-summary .summary-pill {
                font-size: 0.72rem;
                padding: 4px 10px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }
        }