/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --accent: #f0b429;
            --accent-light: #f7d070;
            --accent-dark: #d49a1a;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --text-primary: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --text-light: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.14);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --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);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-body);
            background: var(--bg-light);
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-primary); font-weight: 700; line-height: 1.25; }

        /* ===== Container ===== */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .container-wide { max-width: 1400px; margin: 0 auto; padding: 0 20px; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255,255,255,0.92); backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(226,232,240,0.6);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.06); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: 68px; padding: 0 20px;
            max-width: 1400px; margin: 0 auto;
        }
        .logo-wrap { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
        .logo-icon {
            width: 36px; height: 36px; border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            display: flex; align-items: center; justify-content: center; color: #fff; font-size: 18px;
        }
        .logo-text {
            font-size: 20px; font-weight: 800; color: var(--text-primary);
            letter-spacing: -0.3px; white-space: nowrap;
        }
        .logo-text span { color: var(--accent); }
        .nav-main { display: flex; align-items: center; gap: 4px; }
        .nav-main a {
            padding: 8px 14px; border-radius: var(--radius-sm);
            font-size: 14px; font-weight: 500; color: var(--text-body);
            transition: all var(--transition); position: relative;
        }
        .nav-main a:hover { background: rgba(30,58,95,0.06); color: var(--primary); }
        .nav-main a.active { color: var(--primary); font-weight: 600; }
        .nav-main a.active::after {
            content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
            width: 20px; height: 3px; border-radius: 2px; background: var(--accent);
        }
        .header-actions { display: flex; align-items: center; gap: 12px; }
        .search-box {
            display: flex; align-items: center; gap: 6px;
            background: var(--bg-light); border: 1px solid var(--border);
            border-radius: 100px; padding: 4px 12px 4px 16px;
            transition: all var(--transition); min-width: 160px;
        }
        .search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(30,58,95,0.08); }
        .search-box input {
            border: none; background: transparent; outline: none;
            font-size: 13px; color: var(--text-primary); width: 100px;
            padding: 6px 0;
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .search-box button { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 14px; padding: 4px; }
        .btn-cta {
            display: inline-flex; align-items: center; gap: 6px;
            background: var(--primary); color: #fff; border: none;
            padding: 8px 20px; border-radius: 100px; font-size: 13px; font-weight: 600;
            cursor: pointer; transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(30,58,95,0.20);
        }
        .btn-cta:hover { background: var(--primary-light); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(30,58,95,0.25); }
        .btn-cta:active { transform: translateY(0); }
        .btn-cta-accent { background: var(--accent); color: var(--text-primary); box-shadow: 0 2px 8px rgba(240,180,41,0.30); }
        .btn-cta-accent:hover { background: var(--accent-light); color: var(--text-primary); box-shadow: 0 6px 20px rgba(240,180,41,0.35); }

        /* Mobile toggle */
        .mobile-toggle { display: none; background: none; border: none; font-size: 22px; color: var(--text-primary); cursor: pointer; padding: 6px; }
        .mobile-menu {
            display: none; position: fixed; top: 68px; left: 0; right: 0;
            background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border); padding: 16px 20px 24px;
            box-shadow: var(--shadow-lg); z-index: 999;
            flex-direction: column; gap: 6px;
        }
        .mobile-menu.open { display: flex; }
        .mobile-menu a {
            padding: 12px 16px; border-radius: var(--radius-sm);
            font-size: 15px; font-weight: 500; color: var(--text-body);
        }
        .mobile-menu a:hover { background: rgba(30,58,95,0.06); color: var(--primary); }
        .mobile-menu a.active { color: var(--primary); background: rgba(30,58,95,0.04); font-weight: 600; }
        .mobile-menu .btn-cta { justify-content: center; margin-top: 8px; }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px; position: relative; overflow: hidden;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2744 50%, var(--primary-dark) 100%);
            min-height: 80vh; display: flex; align-items: center;
        }
        .hero-bg {
            position: absolute; inset: 0; z-index: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center; opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .hero-overlay { position: absolute; inset: 0; z-index: 1; background: radial-gradient(ellipse at 30% 50%, rgba(30,58,95,0.3) 0%, transparent 70%); }
        .hero .container { position: relative; z-index: 2; width: 100%; }
        .hero-content { max-width: 720px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 6px;
            background: rgba(240,180,41,0.15); color: var(--accent-light);
            padding: 6px 16px; border-radius: 100px; font-size: 13px; font-weight: 500;
            margin-bottom: 20px; border: 1px solid rgba(240,180,41,0.20);
        }
        .hero h1 {
            font-size: clamp(36px, 6vw, 60px); color: #fff; font-weight: 800;
            letter-spacing: -0.5px; line-height: 1.1; margin-bottom: 20px;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: clamp(16px, 2vw, 20px); color: rgba(255,255,255,0.7);
            line-height: 1.7; margin-bottom: 32px; max-width: 600px;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
        .hero-actions .btn-cta { padding: 14px 32px; font-size: 15px; border-radius: 100px; }
        .hero-actions .btn-outline {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 14px 28px; border-radius: 100px; font-size: 15px; font-weight: 600;
            color: #fff; background: transparent; border: 1.5px solid rgba(255,255,255,0.25);
            transition: all var(--transition); cursor: pointer;
        }
        .hero-actions .btn-outline:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.4); }
        .hero-stats {
            display: flex; flex-wrap: wrap; gap: 32px; margin-top: 48px;
            padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat { text-align: left; }
        .hero-stat .num { font-size: 28px; font-weight: 800; color: #fff; line-height: 1.2; }
        .hero-stat .label { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 2px; }

        /* ===== Section ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-white); }
        .section-dark { background: var(--bg-dark); color: var(--text-light); }
        .section-dark h2, .section-dark h3 { color: #fff; }
        .section-header { text-align: center; max-width: 680px; margin: 0 auto 52px; }
        .section-header h2 {
            font-size: clamp(26px, 3.5vw, 36px); font-weight: 800;
            letter-spacing: -0.3px; margin-bottom: 12px;
        }
        .section-header p { font-size: 16px; color: var(--text-muted); line-height: 1.7; }
        .section-dark .section-header p { color: rgba(255,255,255,0.6); }
        .section-header .badge {
            display: inline-block; background: rgba(30,58,95,0.08); color: var(--primary);
            padding: 4px 14px; border-radius: 100px; font-size: 12px; font-weight: 600;
            margin-bottom: 12px; letter-spacing: 0.3px;
        }
        .section-dark .section-header .badge { background: rgba(240,180,41,0.15); color: var(--accent); }

        /* ===== Card ===== */
        .card {
            background: var(--bg-white); border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
            transition: all var(--transition); overflow: hidden;
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
        .card-body { padding: 20px 24px 24px; }
        .card-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
        .card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; }
        .card-body .meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text-muted); }
        .card-body .tag {
            display: inline-block; background: rgba(30,58,95,0.06); color: var(--primary);
            padding: 2px 10px; border-radius: 100px; font-size: 11px; font-weight: 500;
        }

        /* ===== Feature Cards ===== */
        .feature-card {
            background: var(--bg-white); border-radius: var(--radius-md);
            padding: 32px 28px; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light); transition: all var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .feature-card .icon {
            width: 52px; height: 52px; border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            display: flex; align-items: center; justify-content: center;
            font-size: 22px; color: #fff; margin-bottom: 18px;
        }
        .feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
        .feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

        /* ===== Grid ===== */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

        /* ===== Category Entry ===== */
        .cat-card {
            position: relative; border-radius: var(--radius-md); overflow: hidden;
            background: var(--bg-white); box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light); transition: all var(--transition);
            display: block; color: inherit;
        }
        .cat-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); color: inherit; }
        .cat-card .cat-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .cat-card .cat-body { padding: 18px 20px 20px; }
        .cat-card .cat-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
        .cat-card .cat-body p { font-size: 13px; color: var(--text-muted); }
        .cat-card .cat-body .arrow { color: var(--accent); font-size: 14px; margin-top: 8px; display: inline-block; }

        /* ===== List / Article Item ===== */
        .article-item {
            display: flex; gap: 20px; padding: 20px 0;
            border-bottom: 1px solid var(--border-light); align-items: flex-start;
        }
        .article-item:last-child { border-bottom: none; }
        .article-item .thumb {
            width: 160px; min-height: 100px; border-radius: var(--radius-sm);
            object-fit: cover; flex-shrink: 0; background: var(--border);
        }
        .article-item .info { flex: 1; }
        .article-item .info h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
        .article-item .info h3 a { color: var(--text-primary); }
        .article-item .info h3 a:hover { color: var(--primary); }
        .article-item .info p { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 8px; }
        .article-item .info .meta { font-size: 12px; color: var(--text-muted); display: flex; gap: 14px; flex-wrap: wrap; }
        .article-item .info .meta .tag { background: rgba(30,58,95,0.06); color: var(--primary); padding: 1px 10px; border-radius: 100px; font-size: 11px; }

        /* ===== Stats ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-item {
            text-align: center; padding: 32px 16px;
            background: rgba(255,255,255,0.04); border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.06);
        }
        .stat-item .num { font-size: 36px; font-weight: 800; color: var(--accent); line-height: 1.2; }
        .stat-item .label { font-size: 14px; color: rgba(255,255,255,0.6); margin-top: 6px; }

        /* ===== Process / Steps ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; counter-reset: step; }
        .step-card {
            background: var(--bg-white); border-radius: var(--radius-md);
            padding: 32px 28px; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light); text-align: center;
            position: relative; transition: all var(--transition);
        }
        .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .step-card .step-num {
            width: 44px; height: 44px; border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff; display: flex; align-items: center; justify-content: center;
            font-size: 18px; font-weight: 700; margin: 0 auto 16px;
        }
        .step-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
        .step-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            border-bottom: 1px solid var(--border); padding: 18px 0;
        }
        .faq-question {
            display: flex; justify-content: space-between; align-items: center;
            font-size: 16px; font-weight: 600; color: var(--text-primary);
            cursor: pointer; background: none; border: none; width: 100%; text-align: left;
            padding: 4px 0; transition: color var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question .icon { font-size: 18px; transition: transform var(--transition); color: var(--text-muted); }
        .faq-item.open .faq-question .icon { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease;
            font-size: 14px; color: var(--text-muted); line-height: 1.7;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding-top: 12px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 80px 0; text-align: center; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover; background-position: center; opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { font-size: clamp(26px, 3vw, 38px); color: #fff; font-weight: 800; margin-bottom: 14px; }
        .cta-section p { font-size: 16px; color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 28px; }
        .cta-section .btn-cta { padding: 14px 36px; font-size: 16px; border-radius: 100px; }
        .cta-section .btn-cta:hover { box-shadow: 0 8px 30px rgba(0,0,0,0.20); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.7);
            padding: 56px 0 28px; font-size: 14px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; margin-bottom: 36px; }
        .footer-brand .logo-text { color: #fff; margin-bottom: 12px; display: inline-block; }
        .footer-brand p { font-size: 13px; line-height: 1.7; max-width: 300px; margin-top: 12px; }
        .footer-col h4 { color: #fff; font-size: 14px; font-weight: 700; margin-bottom: 14px; }
        .footer-col ul { display: flex; flex-direction: column; gap: 8px; }
        .footer-col a { color: rgba(255,255,255,0.6); font-size: 13px; }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px; display: flex; justify-content: space-between; align-items: center;
            flex-wrap: wrap; gap: 12px;
        }
        .footer-bottom p { font-size: 12px; color: rgba(255,255,255,0.4); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 36px; height: 36px; border-radius: 50%;
            background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center;
            color: rgba(255,255,255,0.5); font-size: 15px; transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: var(--text-primary); }

        /* ===== ===== Responsive ===== ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .nav-main { display: none; }
            .header-actions .btn-cta { display: none; }
            .search-box { min-width: auto; }
            .search-box input { width: 80px; }
            .mobile-toggle { display: block; }

            .hero { padding: 120px 0 60px; min-height: auto; }
            .hero h1 { font-size: 32px; }
            .hero-stats { gap: 20px; }
            .hero-stat .num { font-size: 22px; }

            .section { padding: 56px 0; }
            .section-header { margin-bottom: 36px; }

            .grid-3 { grid-template-columns: 1fr; gap: 20px; }
            .grid-2 { grid-template-columns: 1fr; gap: 20px; }
            .steps-grid { grid-template-columns: 1fr; }

            .article-item { flex-direction: column; }
            .article-item .thumb { width: 100%; height: 160px; }

            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .stat-item { padding: 20px 12px; }
            .stat-item .num { font-size: 28px; }

            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-actions .btn-cta, .hero-actions .btn-outline { justify-content: center; }
        }

        @media (max-width: 520px) {
            .header-inner { height: 60px; padding: 0 12px; }
            .logo-text { font-size: 17px; }
            .search-box { min-width: auto; padding: 4px 8px 4px 12px; }
            .search-box input { width: 60px; font-size: 12px; }

            .hero { padding: 100px 0 48px; }
            .hero h1 { font-size: 26px; }
            .hero p { font-size: 14px; }
            .hero-stats { flex-direction: column; gap: 12px; }

            .section { padding: 40px 0; }
            .section-header h2 { font-size: 22px; }

            .grid-4 { grid-template-columns: 1fr; }

            .card-body { padding: 16px 18px 20px; }

            .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
            .stat-item { padding: 16px 8px; }
            .stat-item .num { font-size: 24px; }

            .cta-section { padding: 48px 0; }
            .cta-section h2 { font-size: 22px; }

            .faq-question { font-size: 14px; }
        }

        /* ===== Utility ===== */
        .text-accent { color: var(--accent); }
        .text-center { text-align: center; }
        .mt-8 { margin-top: 32px; }
        .mb-8 { margin-bottom: 32px; }
        .gap-4 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Empty state ===== */
        .empty-state { padding: 32px 0; text-align: center; color: var(--text-muted); font-size: 14px; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --accent: #e63946;
            --accent-light: #ff6b6b;
            --accent-dark: #b71c1c;
            --bg: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --bg-section: #f0f2f8;
            --text: #1a1a2e;
            --text-light: #6b7280;
            --text-white: #f0f4ff;
            --border: #e5e7eb;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow: 0 8px 30px rgba(0,0,0,0.06);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.10);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul { list-style: none; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow { max-width: 880px; }

        /* ===== Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(0,0,0,0.04);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .logo-text {
            font-size: 24px;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--primary-dark);
            white-space: nowrap;
        }
        .logo-text span { color: var(--accent); }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            font-weight: 500;
            font-size: 15px;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(26,42,108,0.06);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(26,42,108,0.10);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 0 16px;
            height: 40px;
            width: 200px;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26,42,108,0.10);
            width: 260px;
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            color: var(--text);
            font-size: 14px;
            padding: 8px 0;
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-search i { color: var(--text-light); font-size: 14px; margin-right: 8px; }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: var(--accent);
            color: #fff !important;
            border-radius: 40px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(230,57,70,0.30);
        }
        .btn-cta i { font-size: 14px; }
        .mobile-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--text); cursor: pointer; padding: 4px; }

        /* ===== Hero / Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-banner::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-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-banner h1 {
            font-size: clamp(28px, 4vw, 48px);
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 800px;
            margin: 0 auto 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            color: rgba(255,255,255,0.75);
            font-size: 15px;
            flex-wrap: wrap;
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta .badge {
            background: var(--accent);
            color: #fff;
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-bottom: 24px;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
        }
        .breadcrumb a { color: rgba(255,255,255,0.7); }
        .breadcrumb a:hover { color: #fff; }
        .breadcrumb i { font-size: 12px; }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px 56px;
        }
        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            margin: 40px 0 16px;
            color: var(--primary-dark);
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 32px 0 12px;
            color: var(--primary);
        }
        .article-body p {
            margin-bottom: 18px;
            color: var(--text);
            line-height: 1.85;
        }
        .article-body ul, .article-body ol {
            margin: 16px 0 20px 24px;
        }
        .article-body li {
            margin-bottom: 8px;
            line-height: 1.7;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-section);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body a { color: var(--accent); font-weight: 500; }
        .article-body a:hover { text-decoration: underline; }
        .article-body .highlight-box {
            background: linear-gradient(135deg, var(--bg-section), #eef0f8);
            border-radius: var(--radius-sm);
            padding: 24px 28px;
            margin: 24px 0;
            border: 1px solid var(--border);
        }
        .article-footer-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-footer-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-light);
            font-weight: 500;
            padding: 8px 20px;
            border-radius: 40px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-footer-nav a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(26,42,108,0.04);
        }
        .article-footer-nav .btn-back {
            background: var(--primary);
            color: #fff !important;
            border-color: var(--primary);
        }
        .article-footer-nav .btn-back:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
        }

        /* ===== Related / CTA ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-section);
        }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
            color: var(--primary-dark);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 20px 24px 24px;
        }
        .related-card .card-body h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-light);
        }

        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            text-align: center;
            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: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: clamp(24px, 3.5vw, 40px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            font-size: 17px;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta {
            background: #fff;
            color: var(--primary-dark) !important;
            font-size: 17px;
            padding: 14px 40px;
        }
        .cta-section .btn-cta:hover {
            background: var(--accent);
            color: #fff !important;
            box-shadow: 0 8px 30px rgba(230,57,70,0.35);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 26px;
            margin-bottom: 16px;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 380px;
            color: rgba(255,255,255,0.6);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--accent-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: rgba(255,255,255,0.5);
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a {
            color: rgba(255,255,255,0.5);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer-social a:hover { color: var(--accent-light); transform: scale(1.1); }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found i { font-size: 56px; color: var(--text-light); margin-bottom: 20px; }
        .not-found h2 { font-size: 28px; margin-bottom: 12px; }
        .not-found p { color: var(--text-light); margin-bottom: 24px; }
        .not-found a { color: var(--accent); font-weight: 500; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .nav-search { width: 160px; }
            .nav-search:focus-within { width: 200px; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .article-body { padding: 36px 32px; }
        }
        @media (max-width: 768px) {
            :root { --nav-height: 64px; }
            .mobile-toggle { display: block; }
            .nav-main {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: var(--shadow);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border);
                z-index: 999;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-main a { width: 100%; padding: 12px 18px; font-size: 16px; }
            .nav-actions { gap: 8px; }
            .nav-search { width: 140px; }
            .nav-search:focus-within { width: 180px; }
            .btn-cta { padding: 8px 20px; font-size: 14px; }
            .article-banner { padding: 60px 0 40px; min-height: 240px; }
            .article-body { padding: 24px 20px; border-radius: var(--radius-sm); }
            .article-body h2 { font-size: 22px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-footer-nav { flex-direction: column; align-items: stretch; }
            .article-footer-nav a { justify-content: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .nav-search { width: 100px; }
            .nav-search:focus-within { width: 140px; }
            .nav-search input { font-size: 13px; }
            .btn-cta span { display: none; }
            .article-meta { gap: 12px; font-size: 13px; }
            .article-banner h1 { font-size: 24px; }
            .article-body { padding: 16px 14px; }
            .article-body h2 { font-size: 20px; }
            .cta-section h2 { font-size: 22px; }
            .cta-section .btn-cta { padding: 12px 28px; font-size: 15px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --accent: #e94560;
            --accent-hover: #d63850;
            --accent-light: rgba(233, 69, 96, 0.12);
            --bg-body: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #0f0f1a;
            --bg-section-alt: #f0f2f8;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-weak: #8888aa;
            --text-white: #ffffff;
            --text-muted: #b0b0cc;
            --border: #e6e8f0;
            --border-light: #f0f2f8;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 26, 46, 0.08);
            --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.12);
            --shadow-accent: 0 8px 32px rgba(233, 69, 96, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== 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);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(2.2rem, 5.5vw, 3.8rem);
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            gap: 16px;
        }
        .logo-text {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.03em;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--accent);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--accent-light);
        }
        .nav-main a.active {
            color: var(--accent);
            background: var(--accent-light);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--accent);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-toggle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            background: var(--bg-section-alt);
            transition: var(--transition);
            font-size: 1rem;
        }
        .search-toggle:hover {
            background: var(--accent-light);
            color: var(--accent);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            background: var(--accent);
            color: #fff !important;
            transition: var(--transition);
            box-shadow: var(--shadow-accent);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(233, 69, 96, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--border);
            color: var(--text-primary);
            background: transparent;
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-light);
        }
        .btn-outline:active {
            transform: scale(0.97);
        }
        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--text-primary);
            background: var(--bg-section-alt);
            border: none;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .nav-main {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-main a.active::after {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .nav-right .btn-primary span {
                display: none;
            }
            .nav-right .btn-primary {
                padding: 10px 16px;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                padding: 0 12px;
                gap: 8px;
            }
            .logo-text {
                font-size: 1.2rem;
            }
            .search-toggle {
                width: 36px;
                height: 36px;
                font-size: 0.9rem;
            }
            .nav-right .btn-primary {
                padding: 8px 14px;
                font-size: 0.85rem;
            }
        }

        /* ===== Banner ===== */
        .page-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
            padding: 80px 24px 60px;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 15, 26, 0.85) 0%, rgba(26, 26, 46, 0.7) 100%);
            z-index: 1;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .page-banner h1 {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .page-banner h1 span {
            color: var(--accent);
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .banner-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .banner-badges .badge {
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .banner-badges .badge i {
            margin-right: 6px;
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .page-banner {
                min-height: 240px;
                padding: 60px 16px 40px;
            }
            .page-banner p {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .page-banner {
                min-height: 200px;
                padding: 50px 12px 32px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
        }

        /* ===== Section Base ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle {
            color: var(--text-white);
        }
        .section-dark p {
            color: rgba(255, 255, 255, 0.75);
        }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header .section-subtitle {
            color: var(--text-secondary);
            font-size: 1.1rem;
        }
        .section-header .section-tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .section-header .section-tag i {
            margin-right: 6px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: 40px 0;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(233, 69, 96, 0.15);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 22px 24px 24px;
        }
        .card-body h3 {
            margin-bottom: 8px;
            font-size: 1.15rem;
        }
        .card-body h3 a {
            color: var(--text-primary);
        }
        .card-body h3 a:hover {
            color: var(--accent);
        }
        .card-body p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-weak);
        }
        .card-meta i {
            margin-right: 4px;
        }
        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 10px;
        }
        .card-tags .tag {
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--accent-light);
            color: var(--accent);
        }
        .card-tags .tag.tag-blue {
            background: rgba(59, 130, 246, 0.12);
            color: #3b82f6;
        }
        .card-tags .tag.tag-green {
            background: rgba(16, 185, 129, 0.12);
            color: #10b981;
        }
        .card-tags .tag.tag-orange {
            background: rgba(245, 158, 11, 0.12);
            color: #f59e0b;
        }
        .card-tags .tag.tag-purple {
            background: rgba(139, 92, 246, 0.12);
            color: #8b5cf6;
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Login Category Cards (特色) ===== */
        .login-category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .login-category-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
        }
        .login-category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(233, 69, 96, 0.2);
        }
        .login-category-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--accent);
            transition: var(--transition);
        }
        .login-category-card:hover .icon-wrap {
            background: var(--accent);
            color: #fff;
            transform: scale(1.05);
        }
        .login-category-card h3 {
            margin-bottom: 8px;
        }
        .login-category-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .login-category-card .btn-small {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
            background: var(--accent);
            color: #fff;
            transition: var(--transition);
        }
        .login-category-card .btn-small:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-accent);
        }
        @media (max-width: 1024px) {
            .login-category-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .login-category-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .login-category-card {
                padding: 24px 20px 20px;
            }
        }

        /* ===== Feature List ===== */
        .feature-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .feature-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--bg-card);
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: rgba(233, 69, 96, 0.15);
        }
        .feature-item .f-icon {
            width: 44px;
            height: 44px;
            min-width: 44px;
            border-radius: 50%;
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.1rem;
        }
        .feature-item h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .feature-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .feature-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Steps / Timeline ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(233, 69, 96, 0.25);
        }
        .step-card h4 {
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-card {
                padding: 24px 16px 20px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(233, 69, 96, 0.15);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question i {
            color: var(--accent);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            padding: 80px 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 15, 26, 0.88) 0%, rgba(26, 26, 46, 0.75) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-primary {
            font-size: 1.05rem;
            padding: 14px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 1.4rem;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            max-width: 360px;
            margin-bottom: 0;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0 28px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.85rem;
            margin-bottom: 0;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-accent);
            z-index: 999;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            border: none;
            cursor: pointer;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-hover);
            transform: translateY(-4px) scale(1.05);
        }

        /* ===== Focus / Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== Structured Data (hidden) ===== */
        .hidden-sd {
            display: none;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-weak);
            padding: 16px 0 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-weak);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb span {
            color: var(--text-secondary);
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        @media (max-width: 520px) {
            .breadcrumb {
                font-size: 0.8rem;
                padding: 12px 0 4px;
            }
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 400px) {
            .header-inner {
                padding: 0 8px;
            }
            .nav-right .btn-primary {
                padding: 6px 12px;
                font-size: 0.8rem;
            }
            .nav-right .btn-primary i {
                margin-right: 0;
            }
            .logo-text {
                font-size: 1rem;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
        }