/* roulang page: index */
/* ===== Design Variables ===== */
    :root {
        --primary: #1a2a6c;
        --primary-light: #2d4a8e;
        --primary-dark: #0f1a4a;
        --accent: #f59e0b;
        --accent-light: #fbbf24;
        --accent-dark: #d97706;
        --blue-accent: #2563eb;
        --bg: #f8fafc;
        --bg-white: #ffffff;
        --bg-dark: #0f172a;
        --text: #0f172a;
        --text-light: #64748b;
        --text-white: #f1f5f9;
        --border: #e2e8f0;
        --border-light: #f1f5f9;
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
        --shadow-md: 0 8px 32px rgba(0,0,0,0.07);
        --shadow-lg: 0 16px 48px rgba(0,0,0,0.10);
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --sidebar-width: 240px;
        --sidebar-collapsed: 72px;
        --header-height: 64px;
        --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
    body {
        font-family: var(--font-sans);
        color: var(--text);
        background: var(--bg);
        line-height: 1.6;
        display: flex;
        min-height: 100vh;
    }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--blue-accent); }
    a:focus-visible { outline: 2px solid var(--blue-accent); outline-offset: 2px; border-radius: var(--radius-sm); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
    button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
    button { cursor: pointer; background: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
    h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
    h2 { font-size: 2rem; letter-spacing: -0.01em; }
    h3 { font-size: 1.4rem; }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 1rem; color: var(--text-light); }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }
    .section { padding: 80px 0; }
    .section-title { text-align: center; margin-bottom: 16px; }
    .section-subtitle { text-align: center; color: var(--text-light); max-width: 640px; margin: 0 auto 48px; font-size: 1.1rem; }
    .text-center { text-align: center; }
    .mt-8 { margin-top: 32px; }
    .mb-8 { margin-bottom: 32px; }

    /* ===== Sidebar Navigation ===== */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: var(--sidebar-width);
        height: 100vh;
        background: var(--bg-white);
        border-right: 1px solid var(--border);
        display: flex;
        flex-direction: column;
        z-index: 1000;
        transition: transform var(--transition), width var(--transition);
        box-shadow: var(--shadow-sm);
    }
    .sidebar-brand {
        padding: 24px 20px;
        border-bottom: 1px solid var(--border);
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .sidebar-brand .brand-icon {
        width: 40px;
        height: 40px;
        background: var(--primary);
        border-radius: var(--radius-md);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1.3rem;
        flex-shrink: 0;
    }
    .sidebar-brand .brand-text {
        font-size: 1.15rem;
        font-weight: 700;
        color: var(--primary);
        line-height: 1.2;
        letter-spacing: -0.01em;
    }
    .sidebar-nav {
        flex: 1;
        padding: 16px 12px;
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
    .sidebar-nav a {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 12px 16px;
        border-radius: var(--radius-md);
        color: var(--text-light);
        font-weight: 500;
        font-size: 0.95rem;
        transition: all var(--transition);
    }
    .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.1rem; }
    .sidebar-nav a:hover { background: var(--bg); color: var(--primary); }
    .sidebar-nav a.active {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 12px rgba(26,42,108,0.25);
    }
    .sidebar-nav a.active i { color: #fff; }
    .sidebar-footer {
        padding: 16px 20px;
        border-top: 1px solid var(--border);
        font-size: 0.8rem;
        color: var(--text-light);
        text-align: center;
    }

    /* ===== Main Content ===== */
    .main-content {
        margin-left: var(--sidebar-width);
        flex: 1;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }

    /* ===== Mobile Header ===== */
    .mobile-header {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--header-height);
        background: var(--bg-white);
        border-bottom: 1px solid var(--border);
        z-index: 999;
        padding: 0 16px;
        align-items: center;
        justify-content: space-between;
        box-shadow: var(--shadow-sm);
    }
    .mobile-header .brand-text {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--primary);
    }
    .mobile-header .menu-toggle {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        color: var(--text);
        font-size: 1.4rem;
        transition: background var(--transition);
    }
    .mobile-header .menu-toggle:hover { background: var(--bg); }
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.4);
        z-index: 998;
        opacity: 0;
        transition: opacity var(--transition);
    }
    .sidebar-overlay.show { opacity: 1; }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        padding: 100px 0 80px;
        background: var(--primary-dark);
        color: #fff;
        overflow: hidden;
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        opacity: 0.25;
        z-index: 0;
    }
    .hero-bg::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(15,26,74,0.85) 0%, rgba(26,42,108,0.65) 100%);
    }
    .hero .container { position: relative; z-index: 1; }
    .hero-content { max-width: 720px; }
    .hero h1 { color: #fff; font-size: 3.2rem; margin-bottom: 20px; letter-spacing: -0.02em; }
    .hero h1 span { color: var(--accent); }
    .hero p { color: rgba(255,255,255,0.8); font-size: 1.2rem; margin-bottom: 32px; max-width: 560px; }
    .hero-badges { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(255,255,255,0.12);
        backdrop-filter: blur(4px);
        padding: 8px 18px;
        border-radius: 30px;
        font-size: 0.9rem;
        color: rgba(255,255,255,0.9);
        border: 1px solid rgba(255,255,255,0.08);
    }
    .hero-badge i { color: var(--accent); }
    .hero-buttons { display: flex; flex-wrap: wrap; gap: 16px; }
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 14px 32px;
        border-radius: 30px;
        font-weight: 600;
        font-size: 1rem;
        transition: all var(--transition);
        border: 2px solid transparent;
    }
    .btn-primary {
        background: var(--accent);
        color: var(--primary-dark);
        border-color: var(--accent);
    }
    .btn-primary:hover { background: var(--accent-light); border-color: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.35); color: var(--primary-dark); }
    .btn-outline {
        background: transparent;
        color: #fff;
        border-color: rgba(255,255,255,0.4);
    }
    .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; transform: translateY(-2px); color: #fff; }
    .btn-lg { padding: 16px 40px; font-size: 1.1rem; }

    /* ===== Features ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .feature-card {
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        padding: 36px 28px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: all var(--transition);
        text-align: center;
    }
    .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--accent-light); }
    .feature-icon {
        width: 64px;
        height: 64px;
        border-radius: 16px;
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 20px;
        color: #fff;
        font-size: 1.6rem;
    }
    .feature-card h3 { margin-bottom: 12px; font-size: 1.2rem; }
    .feature-card p { font-size: 0.95rem; margin-bottom: 0; }

    /* ===== Category Section ===== */
    .category-showcase {
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        display: flex;
        align-items: center;
        transition: box-shadow var(--transition);
    }
    .category-showcase:hover { box-shadow: var(--shadow-md); }
    .category-showcase .cat-image { flex: 0 0 320px; min-height: 220px; overflow: hidden; }
    .category-showcase .cat-image img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; }
    .category-showcase .cat-body { flex: 1; padding: 32px 36px; }
    .category-showcase .cat-body h3 { font-size: 1.5rem; margin-bottom: 12px; }
    .category-showcase .cat-body p { margin-bottom: 20px; }
    .category-showcase .cat-body .btn { padding: 10px 24px; font-size: 0.9rem; }

    /* ===== Latest Posts ===== */
    .posts-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .post-card {
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
    }
    .post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
    .post-card .post-image {
        width: 100%;
        height: 180px;
        background: var(--border);
        overflow: hidden;
    }
    .post-card .post-image img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; transition: transform 0.5s; }
    .post-card:hover .post-image img { transform: scale(1.05); }
    .post-card .post-body { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; }
    .post-card .post-meta { display: flex; gap: 12px; font-size: 0.8rem; color: var(--text-light); margin-bottom: 10px; align-items: center; }
    .post-card .post-meta .tag {
        background: var(--bg);
        padding: 2px 12px;
        border-radius: 20px;
        color: var(--primary);
        font-weight: 500;
        font-size: 0.75rem;
    }
    .post-card .post-body h4 { font-size: 1.05rem; margin-bottom: 8px; flex: 1; }
    .post-card .post-body h4 a { color: var(--text); }
    .post-card .post-body h4 a:hover { color: var(--primary); }
    .post-card .post-body p { font-size: 0.9rem; margin-bottom: 0; }
    .post-card .post-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); font-size: 0.8rem; color: var(--text-light); }

    /* ===== Stats ===== */
    .stats-section {
        background: var(--primary-dark);
        position: relative;
        overflow: hidden;
    }
    .stats-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        opacity: 0.12;
    }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
        position: relative;
        z-index: 1;
    }
    .stat-item { text-align: center; color: #fff; }
    .stat-item .stat-number { font-size: 2.8rem; font-weight: 800; color: var(--accent); line-height: 1.1; margin-bottom: 6px; }
    .stat-item .stat-label { color: rgba(255,255,255,0.7); font-size: 0.95rem; }

    /* ===== Steps ===== */
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .step-card {
        text-align: center;
        padding: 32px 20px;
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border);
        position: relative;
        transition: all var(--transition);
    }
    .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
    .step-number {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: var(--primary);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        font-size: 1.2rem;
        margin: 0 auto 16px;
    }
    .step-card h4 { margin-bottom: 8px; font-size: 1.1rem; }
    .step-card p { font-size: 0.9rem; margin-bottom: 0; }

    /* ===== FAQ ===== */
    .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
    .faq-item {
        background: var(--bg-white);
        border-radius: var(--radius-md);
        border: 1px solid var(--border);
        overflow: hidden;
        transition: all var(--transition);
    }
    .faq-item:hover { border-color: var(--accent-light); }
    .faq-question {
        padding: 20px 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-weight: 600;
        font-size: 1rem;
        cursor: pointer;
        background: none;
        width: 100%;
        text-align: left;
        color: var(--text);
        transition: background var(--transition);
    }
    .faq-question:hover { background: var(--bg); }
    .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 0.9rem; }
    .faq-item.open .faq-question i { transform: rotate(180deg); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
        padding: 0 24px;
        color: var(--text-light);
        font-size: 0.95rem;
        line-height: 1.7;
    }
    .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        color: #fff;
        text-align: center;
        padding: 80px 0;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
        opacity: 0.10;
    }
    .cta-section .container { position: relative; z-index: 1; }
    .cta-section h2 { color: #fff; font-size: 2.2rem; margin-bottom: 16px; }
    .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }
    .cta-section .btn-primary { background: #fff; color: var(--primary); border-color: #fff; }
    .cta-section .btn-primary:hover { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); box-shadow: 0 8px 24px rgba(245,158,11,0.4); }

    /* ===== Footer ===== */
    .footer {
        background: var(--bg-dark);
        color: rgba(255,255,255,0.7);
        padding: 48px 0 32px;
        margin-top: auto;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 32px;
    }
    .footer-brand .brand-text { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 12px; display: block; }
    .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); margin-bottom: 0; }
    .footer-col h5 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
    .footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.9rem; padding: 4px 0; transition: color var(--transition); }
    .footer-col a:hover { color: var(--accent); }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.08);
        padding-top: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.5);
    }

    /* ===== Empty State ===== */
    .empty-state {
        grid-column: 1 / -1;
        text-align: center;
        padding: 48px 24px;
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        border: 1px dashed var(--border);
        color: var(--text-light);
    }
    .empty-state i { font-size: 2.4rem; color: var(--border); margin-bottom: 16px; display: block; }
    .empty-state p { margin-bottom: 0; font-size: 1rem; }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .features-grid { grid-template-columns: repeat(2, 1fr); }
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
        .steps-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: 1fr 1fr; }
        .category-showcase { flex-direction: column; }
        .category-showcase .cat-image { flex: none; width: 100%; height: 200px; }
        .hero h1 { font-size: 2.4rem; }
    }

    @media (max-width: 768px) {
        .sidebar { transform: translateX(-100%); }
        .sidebar.open { transform: translateX(0); }
        .main-content { margin-left: 0; padding-top: var(--header-height); }
        .mobile-header { display: flex; }
        .sidebar-overlay { display: block; pointer-events: none; }
        .sidebar-overlay.show { pointer-events: auto; }
        .hero { padding: 60px 0 50px; }
        .hero h1 { font-size: 2rem; }
        .hero p { font-size: 1rem; }
        .features-grid { grid-template-columns: 1fr; }
        .posts-grid { grid-template-columns: 1fr; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        .steps-grid { grid-template-columns: 1fr 1fr; }
        .footer-grid { grid-template-columns: 1fr; }
        .section { padding: 50px 0; }
        .stat-item .stat-number { font-size: 2rem; }
        .category-showcase .cat-body { padding: 24px; }
        .cta-section h2 { font-size: 1.6rem; }
        .container { padding: 0 16px; }
    }

    @media (max-width: 520px) {
        .hero h1 { font-size: 1.6rem; }
        .hero-buttons .btn { width: 100%; justify-content: center; }
        .steps-grid { grid-template-columns: 1fr; }
        .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
        .stat-item .stat-number { font-size: 1.6rem; }
        .section-title { font-size: 1.5rem; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .btn-lg { padding: 14px 28px; font-size: 1rem; }
    }

    /* ===== Accessibility ===== */
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
    }
    .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

    /* ===== Additional Utilities ===== */
    .gap-2 { gap: 8px; }
    .gap-4 { gap: 16px; }
    .flex-wrap { flex-wrap: wrap; }
    .align-center { align-items: center; }
    .justify-center { justify-content: center; }
    .d-flex { display: flex; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --accent: #e8b84b;
            --accent-light: #f0d080;
            --accent-dark: #c9a030;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-sidebar: #0f2440;
            --bg-sidebar-hover: #1a3258;
            --text-primary: #1a1e2b;
            --text-secondary: #4a5068;
            --text-muted: #8890a8;
            --text-light: #f0f2f5;
            --border-color: #e2e6ee;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.07);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.10);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --sidebar-width: 220px;
            --sidebar-collapsed: 64px;
            --header-height: 0px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--text-primary); }

        /* ===== Container ===== */
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh;
            background: var(--bg-sidebar); color: var(--text-light);
            display: flex; flex-direction: column; z-index: 1000;
            transition: width var(--transition), transform var(--transition);
            overflow-y: auto; overflow-x: hidden;
            box-shadow: 2px 0 20px rgba(0,0,0,0.15);
        }
        .sidebar-logo {
            padding: 24px 18px 20px; border-bottom: 1px solid rgba(255,255,255,0.08);
            display: flex; align-items: center; gap: 10px; white-space: nowrap;
        }
        .sidebar-logo .brand-icon {
            font-size: 1.8rem; color: var(--accent); flex-shrink: 0;
        }
        .sidebar-logo .brand-text {
            font-size: 1.1rem; font-weight: 700; color: #fff; letter-spacing: 0.5px;
        }
        .sidebar-nav {
            flex: 1; padding: 16px 10px; display: flex; flex-direction: column; gap: 4px;
        }
        .sidebar-nav a {
            display: flex; align-items: center; gap: 12px; padding: 12px 14px;
            border-radius: var(--radius-md); color: rgba(255,255,255,0.7);
            font-size: 0.95rem; font-weight: 500; transition: all var(--transition);
            white-space: nowrap; overflow: hidden;
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.05rem; flex-shrink: 0; }
        .sidebar-nav a:hover { background: var(--bg-sidebar-hover); color: #fff; }
        .sidebar-nav a.active, .sidebar-nav a.current {
            background: var(--accent); color: #1a1e2b; font-weight: 600;
            box-shadow: 0 4px 12px rgba(232,184,75,0.3);
        }
        .sidebar-nav .nav-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,0.3); padding: 16px 14px 6px; font-weight: 600; }

        /* ===== Main Content Area ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width); flex: 1; min-height: 100vh;
            display: flex; flex-direction: column; transition: margin var(--transition);
        }

        /* ===== Top Bar (mobile) ===== */
        .topbar {
            display: none; position: sticky; top: 0; z-index: 999;
            background: var(--bg-sidebar); color: #fff; padding: 12px 18px;
            align-items: center; justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0,0,0,0.12);
        }
        .topbar .brand-text { font-weight: 700; font-size: 1.05rem; color: #fff; }
        .topbar .menu-toggle { background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; padding: 4px 8px; border-radius: var(--radius-sm); }
        .topbar .menu-toggle:hover { background: rgba(255,255,255,0.1); }

        /* ===== Article Hero Banner ===== */
        .article-hero {
            position: relative; min-height: 340px; display: flex; align-items: center;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 60px 0 50px; overflow: hidden;
        }
        .article-hero::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12; mix-blend-mode: overlay;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .breadcrumb {
            display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: center;
            font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-bottom: 20px;
        }
        .article-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-hero .breadcrumb a:hover { color: var(--accent); }
        .article-hero .breadcrumb .sep { color: rgba(255,255,255,0.3); }
        .article-hero .breadcrumb .current { color: var(--accent); }
        .article-hero .hero-category {
            display: inline-block; background: var(--accent); color: #1a1e2b;
            padding: 4px 16px; border-radius: 20px; font-size: 0.8rem; font-weight: 600;
            letter-spacing: 0.3px; margin-bottom: 14px;
        }
        .article-hero h1 {
            font-size: 2.4rem; font-weight: 700; color: #fff; max-width: 840px;
            line-height: 1.25; margin-bottom: 16px;
        }
        .article-hero .hero-meta {
            display: flex; flex-wrap: wrap; gap: 18px; align-items: center;
            color: rgba(255,255,255,0.7); font-size: 0.9rem;
        }
        .article-hero .hero-meta i { margin-right: 6px; color: var(--accent); }

        /* ===== Article Main Content ===== */
        .article-main { padding: 48px 0 60px; flex: 1; }
        .article-layout {
            display: grid; grid-template-columns: 1fr 320px; gap: 40px;
        }
        .article-body {
            background: var(--bg-card); border-radius: var(--radius-lg);
            padding: 40px; box-shadow: var(--shadow-sm);
        }
        .article-body .post-cover {
            width: 100%; border-radius: var(--radius-md); margin-bottom: 28px;
            aspect-ratio: 16/9; object-fit: cover;
        }
        .article-body .content {
            font-size: 1.05rem; line-height: 1.85; color: var(--text-secondary);
        }
        .article-body .content p { margin-bottom: 1.2em; }
        .article-body .content h2 { font-size: 1.5rem; margin: 1.6em 0 0.6em; color: var(--text-primary); }
        .article-body .content h3 { font-size: 1.2rem; margin: 1.4em 0 0.5em; color: var(--text-primary); }
        .article-body .content ul, .article-body .content ol { margin: 0.8em 0 1.2em 1.6em; }
        .article-body .content li { margin-bottom: 0.4em; list-style: disc; }
        .article-body .content img { border-radius: var(--radius-md); margin: 1.2em 0; }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent); background: rgba(232,184,75,0.08);
            padding: 16px 20px; margin: 1.2em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary); font-style: italic;
        }
        .article-body .content a { color: var(--primary-light); text-decoration: underline; }
        .article-body .content a:hover { color: var(--accent); }
        .article-body .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border-color); }
        .article-body .tag-list .tag {
            background: var(--bg-body); padding: 4px 14px; border-radius: 20px;
            font-size: 0.8rem; color: var(--text-secondary); border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .article-body .tag-list .tag:hover { background: var(--accent); color: #1a1e2b; border-color: var(--accent); }

        /* ===== Article Sidebar ===== */
        .article-sidebar { display: flex; flex-direction: column; gap: 28px; }
        .sidebar-card {
            background: var(--bg-card); border-radius: var(--radius-lg); padding: 24px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h4 {
            font-size: 1rem; font-weight: 600; margin-bottom: 16px; padding-bottom: 12px;
            border-bottom: 2px solid var(--accent); display: flex; align-items: center; gap: 8px;
        }
        .sidebar-card h4 i { color: var(--accent); }
        .sidebar-card .related-item {
            display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--border-color);
            transition: background var(--transition);
        }
        .sidebar-card .related-item:last-child { border-bottom: none; padding-bottom: 0; }
        .sidebar-card .related-item img {
            width: 72px; height: 52px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0;
        }
        .sidebar-card .related-item .info { flex: 1; }
        .sidebar-card .related-item .info h5 { font-size: 0.88rem; font-weight: 500; margin-bottom: 4px; line-height: 1.4; }
        .sidebar-card .related-item .info h5 a { color: var(--text-primary); }
        .sidebar-card .related-item .info h5 a:hover { color: var(--primary-light); }
        .sidebar-card .related-item .info .date { font-size: 0.78rem; color: var(--text-muted); }
        .sidebar-card .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-md); padding: 20px; color: #fff; text-align: center;
        }
        .sidebar-card .cta-box p { font-size: 0.9rem; margin-bottom: 14px; opacity: 0.9; }
        .sidebar-card .cta-box .btn {
            display: inline-block; background: var(--accent); color: #1a1e2b;
            padding: 10px 28px; border-radius: 30px; font-weight: 600; font-size: 0.9rem;
            transition: all var(--transition);
        }
        .sidebar-card .cta-box .btn:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(232,184,75,0.3); }

        /* ===== Button ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px; padding: 10px 28px;
            border-radius: 30px; font-weight: 600; font-size: 0.95rem; border: none;
            cursor: pointer; transition: all var(--transition);
            background: var(--primary); color: #fff;
        }
        .btn:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-accent { background: var(--accent); color: #1a1e2b; }
        .btn-accent:hover { background: var(--accent-light); color: #1a1e2b; }
        .btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-sidebar); color: rgba(255,255,255,0.75); padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 36px; margin-bottom: 32px; }
        .footer .brand-text { font-size: 1.2rem; font-weight: 700; color: #fff; display: block; margin-bottom: 12px; }
        .footer .footer-brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.6); }
        .footer .footer-col h5 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer .footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.88rem; padding: 4px 0; transition: all var(--transition); }
        .footer .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08); padding-top: 20px; margin-top: 8px;
            display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
            font-size: 0.82rem; color: rgba(255,255,255,0.4);
        }
        .footer .footer-bottom i { margin-right: 4px; color: var(--accent); }

        /* ===== Not Found ===== */
        .not-found { text-align: center; padding: 80px 20px; }
        .not-found .icon { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .not-found p { color: var(--text-secondary); margin-bottom: 24px; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .sidebar { transform: translateX(-100%); width: 260px; }
            .sidebar.open { transform: translateX(0); }
            .main-wrapper { margin-left: 0; }
            .topbar { display: flex; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-hero { min-height: 240px; padding: 40px 0 32px; }
            .article-body { padding: 24px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer .footer-bottom { flex-direction: column; text-align: center; }
            .sidebar-overlay {
                position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 999;
                opacity: 0; pointer-events: none; transition: opacity var(--transition);
            }
            .sidebar-overlay.show { opacity: 1; pointer-events: auto; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-body { padding: 16px; border-radius: var(--radius-md); }
            .article-body .content { font-size: 0.95rem; }
            .article-hero .hero-meta { gap: 10px; font-size: 0.8rem; }
            .sidebar-card .related-item img { width: 56px; height: 42px; }
        }

        /* ===== Overlay for mobile sidebar ===== */
        .sidebar-overlay {
            position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998;
            opacity: 0; pointer-events: none; transition: opacity var(--transition);
        }
        .sidebar-overlay.show { opacity: 1; pointer-events: auto; }

        /* ===== Animations ===== */
        @keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        .animate-fade-up { animation: fadeUp 0.6s ease forwards; }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a6b;
            --primary-light: #2a5a9e;
            --primary-dark: #0f264a;
            --accent: #e8b830;
            --accent-light: #f0d060;
            --accent-dark: #c9a020;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-sidebar: #0f264a;
            --bg-sidebar-hover: #1a3a6b;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-light: #8a9aaa;
            --text-white: #ffffff;
            --border-light: #e5e9f0;
            --border-mid: #c8d0dd;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-accent: 0 4px 16px rgba(232, 184, 48, 0.35);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --sidebar-width: 220px;
            --header-h: 0px;
            --spacer-section: 80px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Sidebar (Left App Shell) ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: 2px 0 24px rgba(0, 0, 0, 0.2);
            transition: var(--transition);
        }

        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .sidebar-brand .brand-icon {
            font-size: 28px;
            color: var(--accent);
        }

        .sidebar-brand .brand-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--text-white);
            line-height: 1.2;
        }

        .sidebar-brand .brand-text span {
            color: var(--accent);
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            cursor: pointer;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 17px;
            flex-shrink: 0;
        }

        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: var(--text-white);
            transform: translateX(4px);
        }

        .sidebar-nav a.active {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            box-shadow: var(--shadow-accent);
        }

        .sidebar-nav a.active i {
            color: var(--primary-dark);
        }

        .sidebar-nav .nav-label {
            padding: 8px 16px 4px;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: rgba(255, 255, 255, 0.3);
            margin-top: 12px;
        }

        .sidebar-footer {
            padding: 16px 20px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Mobile Header (hidden on desktop) ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--bg-sidebar);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.15);
        }

        .mobile-header .brand-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--text-white);
        }

        .mobile-header .brand-text span {
            color: var(--accent);
        }

        .mobile-toggle {
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 24px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Mobile Drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: -280px;
            width: 260px;
            height: 100vh;
            background: var(--bg-sidebar);
            z-index: 1100;
            transition: var(--transition);
            box-shadow: 4px 0 32px rgba(0, 0, 0, 0.3);
            padding: 24px 16px;
            display: flex;
            flex-direction: column;
        }

        .mobile-drawer.open {
            left: 0;
        }

        .mobile-drawer .drawer-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .mobile-drawer .drawer-header .brand-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--text-white);
        }

        .mobile-drawer .drawer-header .brand-text span {
            color: var(--accent);
        }

        .mobile-drawer .drawer-close {
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 22px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }

        .mobile-drawer .drawer-close:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .mobile-drawer .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }

        .mobile-drawer .drawer-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
        }

        .mobile-drawer .drawer-nav a i {
            width: 20px;
            text-align: center;
            font-size: 18px;
        }

        .mobile-drawer .drawer-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: var(--text-white);
        }

        .mobile-drawer .drawer-nav a.active {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
        }

        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1050;
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }

        .drawer-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 60px 0 60px;
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }

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

        .page-banner .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }

        .page-banner .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        .page-banner h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .page-banner h1 span {
            color: var(--accent);
        }

        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .page-banner .banner-tags {
            display: flex;
            justify-content: center;
            gap: 12px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .page-banner .banner-tags .tag {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            color: var(--text-white);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .page-banner .banner-tags .tag i {
            margin-right: 6px;
            color: var(--accent);
        }

        /* ===== Section Common ===== */
        section {
            padding: var(--spacer-section) 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .section-title h2 span {
            color: var(--primary);
        }

        .section-title p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-title .title-bar {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 14px auto 0;
        }

        .section-subtitle {
            text-align: center;
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 680px;
            margin: -32px auto 48px;
            line-height: 1.6;
        }

        /* ===== Intro Section ===== */
        .intro-section {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-light);
        }

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

        .intro-content h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .intro-content h2 span {
            color: var(--primary);
        }

        .intro-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .intro-content .intro-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 24px;
        }

        .intro-content .intro-stats .stat-item {
            background: var(--bg-body);
            padding: 16px 12px;
            border-radius: var(--radius-md);
            text-align: center;
            border: 1px solid var(--border-light);
        }

        .intro-content .intro-stats .stat-item .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .intro-content .intro-stats .stat-item .num span {
            color: var(--accent-dark);
        }

        .intro-content .intro-stats .stat-item .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .intro-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            display: block;
        }

        .intro-image .image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 24px;
            background: linear-gradient(to top, rgba(15, 38, 74, 0.8), transparent);
            color: var(--text-white);
        }

        .intro-image .image-overlay span {
            font-size: 14px;
            font-weight: 500;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 50px;
        }

        /* ===== Filter / Tags ===== */
        .filter-section {
            background: var(--bg-body);
            padding: 24px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .filter-wrap {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            justify-content: center;
        }

        .filter-wrap .filter-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-right: 8px;
        }

        .filter-wrap .filter-btn {
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            background: var(--bg-card);
            color: var(--text-secondary);
            border: 1px solid var(--border-light);
            cursor: pointer;
            transition: var(--transition);
        }

        .filter-wrap .filter-btn:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: rgba(26, 58, 107, 0.04);
        }

        .filter-wrap .filter-btn.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .filter-wrap .filter-btn i {
            margin-right: 6px;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-mid);
        }

        .card-item .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .card-item .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .card-item:hover .card-img img {
            transform: scale(1.05);
        }

        .card-item .card-img .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 50px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }

        .card-item .card-img .card-date {
            position: absolute;
            bottom: 14px;
            right: 14px;
            background: rgba(15, 38, 74, 0.8);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 50px;
        }

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

        .card-item .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-item .card-body h3 a {
            color: var(--text-primary);
        }

        .card-item .card-body h3 a:hover {
            color: var(--primary);
        }

        .card-item .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            flex: 1;
        }

        .card-item .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
            margin-top: auto;
        }

        .card-item .card-body .card-meta i {
            margin-right: 4px;
        }

        .card-item .card-body .card-meta .meta-item {
            display: flex;
            align-items: center;
        }

        /* ===== Process / Steps ===== */
        .process-section {
            background: var(--bg-card);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .process-step {
            text-align: center;
            padding: 32px 20px;
            border-radius: var(--radius-md);
            background: var(--bg-body);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }

        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-mid);
        }

        .process-step .step-num {
            width: 48px;
            height: 48px;
            line-height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(26, 58, 107, 0.3);
        }

        .process-step .step-icon {
            font-size: 32px;
            color: var(--primary-light);
            margin-bottom: 12px;
        }

        .process-step h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .process-step .step-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 20px;
            color: var(--accent);
            opacity: 0.6;
        }

        .process-step:last-child .step-arrow {
            display: none;
        }

        /* ===== Data / Stats ===== */
        .data-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            position: relative;
            overflow: hidden;
        }

        .data-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .data-section .container {
            position: relative;
            z-index: 2;
        }

        .data-section .section-title h2 {
            color: var(--text-white);
        }

        .data-section .section-title p {
            color: rgba(255, 255, 255, 0.7);
        }

        .data-section .section-title .title-bar {
            background: var(--accent);
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .data-item {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }

        .data-item:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-4px);
        }

        .data-item .data-icon {
            font-size: 36px;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .data-item .data-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }

        .data-item .data-num span {
            color: var(--accent);
        }

        .data-item .data-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-body);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--border-mid);
            box-shadow: var(--shadow-sm);
        }

        .faq-item .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition);
            user-select: none;
        }

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

        .faq-item .faq-question .faq-toggle {
            font-size: 18px;
            color: var(--primary-light);
            transition: var(--transition);
            flex-shrink: 0;
            margin-left: 16px;
        }

        .faq-item.active .faq-question .faq-toggle {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }

        .cta-box .container {
            position: relative;
            z-index: 2;
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }

        .cta-box p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 580px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-box .cta-btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: var(--shadow-accent);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 184, 48, 0.45);
            background: var(--accent-light);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-white);
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid rgba(255, 255, 255, 0.3);
            cursor: pointer;
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(255, 255, 255, 0.05);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 0;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-white);
        }

        .footer-brand .brand-text span {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-top: 12px;
            max-width: 300px;
        }

        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 5px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom i {
            color: var(--accent);
            margin-right: 4px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --spacer-section: 60px;
            }

            .sidebar {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .main-content {
                margin-left: 0;
            }

            .page-banner {
                padding: 48px 0 48px;
                min-height: 220px;
            }

            .page-banner h1 {
                font-size: 32px;
            }

            .page-banner p {
                font-size: 16px;
            }

            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .intro-image img {
                height: 300px;
            }

            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .process-step .step-arrow {
                display: none;
            }

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .cta-box {
                padding: 40px 28px;
            }

            .cta-box h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacer-section: 48px;
            }

            .container {
                padding: 0 16px;
            }

            .page-banner {
                padding: 36px 0 40px;
                min-height: 180px;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner p {
                font-size: 14px;
            }

            .page-banner .banner-tags .tag {
                font-size: 12px;
                padding: 4px 14px;
            }

            .section-title h2 {
                font-size: 26px;
            }

            .section-title p {
                font-size: 15px;
            }

            .intro-content h2 {
                font-size: 24px;
            }

            .intro-content .intro-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }

            .intro-content .intro-stats .stat-item .num {
                font-size: 22px;
            }

            .intro-image img {
                height: 220px;
            }

            .filter-wrap {
                gap: 8px;
            }

            .filter-wrap .filter-btn {
                padding: 6px 16px;
                font-size: 13px;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .card-item .card-img {
                height: 180px;
            }

            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .process-step {
                padding: 24px 16px;
            }

            .process-step .step-num {
                width: 40px;
                height: 40px;
                line-height: 40px;
                font-size: 16px;
            }

            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .data-item {
                padding: 24px 16px;
            }

            .data-item .data-num {
                font-size: 32px;
            }

            .faq-item .faq-question {
                padding: 14px 18px;
                font-size: 15px;
            }

            .faq-item .faq-answer {
                font-size: 14px;
            }

            .cta-box {
                padding: 32px 20px;
                border-radius: var(--radius-md);
            }

            .cta-box h2 {
                font-size: 22px;
            }

            .cta-box p {
                font-size: 14px;
            }

            .btn-primary,
            .btn-secondary {
                padding: 12px 28px;
                font-size: 14px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 22px;
            }

            .page-banner .banner-tags {
                gap: 8px;
            }

            .intro-content .intro-stats {
                grid-template-columns: 1fr 1fr;
            }

            .process-grid {
                grid-template-columns: 1fr;
            }

            .data-grid {
                grid-template-columns: 1fr;
            }

            .cta-box .cta-btn-group {
                flex-direction: column;
                align-items: center;
            }

            .mobile-header .brand-text {
                font-size: 15px;
            }
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent);
        }

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

        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .text-center {
            text-align: center;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }