/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a5f;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --transition: all 0.3s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        button, input, textarea { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .section-padding { padding: 80px 0; }
        .section-title { font-size: 2rem; font-weight: 700; color: var(--text-dark); margin-bottom: 12px; letter-spacing: -0.02em; }
        .section-subtitle { font-size: 1.05rem; color: var(--text-muted); max-width: 680px; margin: 0 auto 48px; text-align: center; line-height: 1.7; }
        .text-center { text-align: center; }
        .text-primary { color: var(--primary); }
        .text-accent { color: var(--accent); }
        .bg-primary { background: var(--primary); }
        .bg-primary-dark { background: var(--primary-dark); }
        .bg-accent { background: var(--accent); }
        .bg-white { background: var(--bg-white); }
        .bg-light { background: var(--bg-light); }
        .rounded-card { border-radius: var(--radius); }
        .rounded-sm { border-radius: var(--radius-sm); }
        .shadow-card { box-shadow: var(--shadow); }
        .shadow-card-lg { box-shadow: var(--shadow-lg); }
        .transition { transition: var(--transition); }
        /* header & nav */
        .header {
            position: sticky; top: 0; z-index: 100;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(0,0,0,0.02);
        }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: 72px; gap: 24px;
        }
        .logo {
            font-size: 1.35rem; font-weight: 700; color: var(--primary);
            letter-spacing: -0.02em; white-space: nowrap;
        }
        .logo span { color: var(--accent); }
        .nav-list { display: flex; align-items: center; gap: 8px; list-style: none; }
        .nav-list a {
            padding: 8px 18px; border-radius: 999px; font-size: 0.95rem;
            font-weight: 500; color: var(--text-muted); transition: var(--transition);
        }
        .nav-list a:hover, .nav-list a.active { color: var(--primary); background: rgba(30,64,175,0.08); }
        .nav-list a.active { font-weight: 600; }
        .nav-cta a {
            background: var(--primary); color: #fff !important; padding: 10px 24px;
            border-radius: 999px; font-weight: 600; box-shadow: 0 2px 8px rgba(30,64,175,0.25);
        }
        .nav-cta a:hover { background: var(--primary-light); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(30,64,175,0.3); }
        .mobile-toggle { display: none; font-size: 1.5rem; color: var(--text-dark); background: none; border: none; cursor: pointer; padding: 4px; }
        /* hero */
        .hero {
            position: relative; min-height: 88vh; display: flex; align-items: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            isolation: isolate;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.82) 0%, rgba(30,64,175,0.55) 100%);
            z-index: 1;
        }
        .hero-content { position: relative; z-index: 2; width: 100%; padding: 60px 0; }
        .hero h1 {
            font-size: 3.2rem; font-weight: 800; color: #fff; line-height: 1.2;
            letter-spacing: -0.03em; max-width: 820px; margin-bottom: 20px;
        }
        .hero p {
            font-size: 1.2rem; color: rgba(255,255,255,0.85); max-width: 640px;
            line-height: 1.7; margin-bottom: 36px;
        }
        .hero-buttons { display: flex; flex-wrap: wrap; gap: 16px; }
        .btn {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 34px; border-radius: 999px; font-weight: 600;
            font-size: 1rem; border: none; cursor: pointer; transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(30,64,175,0.3); }
        .btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(30,64,175,0.35); }
        .btn-outline-light { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.6); }
        .btn-outline-light:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }
        .btn-accent { background: var(--accent); color: #0f172a; box-shadow: 0 4px 16px rgba(245,158,11,0.3); }
        .btn-accent:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245,158,11,0.35); }
        /* cards 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: 32px; }
        .card {
            background: var(--bg-white); border-radius: var(--radius); padding: 32px 28px;
            box-shadow: var(--shadow); transition: var(--transition); border: 1px solid rgba(0,0,0,0.03);
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .card-icon { font-size: 2.2rem; color: var(--primary); margin-bottom: 16px; display: inline-block; }
        .card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
        .card p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; }
        .card-img { width: 100%; height: 200px; object-fit: cover; border-radius: var(--radius-sm) var(--radius-sm) 0 0; }
        .card-body { padding: 20px 24px 24px; }
        .badge {
            display: inline-block; padding: 4px 14px; border-radius: 999px;
            font-size: 0.8rem; font-weight: 600; background: rgba(30,64,175,0.08); color: var(--primary);
        }
        .badge-accent { background: rgba(245,158,11,0.12); color: #b45309; }
        /* steps */
        .step-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 32px; counter-reset: step; }
        .step-item { text-align: center; padding: 32px 20px; position: relative; }
        .step-number {
            width: 56px; height: 56px; border-radius: 50%; background: var(--primary);
            color: #fff; font-size: 1.4rem; font-weight: 700; display: flex; align-items: center; justify-content: center;
            margin: 0 auto 18px; box-shadow: 0 4px 16px rgba(30,64,175,0.25);
        }
        .step-item h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
        .step-item p { font-size: 0.9rem; color: var(--text-muted); }
        /* stats */
        .stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
        .stat-item { text-align: center; padding: 28px 16px; }
        .stat-number { font-size: 2.6rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-label { font-size: 0.95rem; color: var(--text-muted); margin-top: 4px; }
        /* 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-sm);
            border: 1px solid var(--border); overflow: hidden; transition: var(--transition);
        }
        .faq-item summary {
            padding: 20px 28px; font-weight: 600; font-size: 1.05rem; cursor: pointer;
            display: flex; align-items: center; justify-content: space-between; list-style: none;
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
            font-size: 0.85rem; color: var(--text-muted); transition: var(--transition);
        }
        .faq-item[open] summary::after { transform: rotate(180deg); }
        .faq-item .faq-answer { padding: 0 28px 20px; color: var(--text-muted); line-height: 1.7; font-size: 0.95rem; }
        /* cta */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            border-radius: var(--radius); padding: 64px 48px; color: #fff; text-align: center;
        }
        .cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
        .cta-section p { font-size: 1.05rem; opacity: 0.85; max-width: 600px; margin: 0 auto 28px; }
        /* footer */
        .footer { background: #0f172a; color: rgba(255,255,255,0.7); padding: 48px 0 32px; }
        .footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
        .footer h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
        .footer a:hover { color: #fff; }
        .footer ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
        .footer-logo { font-size: 1.25rem; font-weight: 700; color: #fff; margin-bottom: 12px; display: inline-block; }
        .footer-logo span { color: var(--accent); }
        .footer-copy { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; margin-top: 40px; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.4); }
        /* cms list */
        .cms-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px,1fr)); gap: 24px; }
        .cms-card {
            background: var(--bg-white); border-radius: var(--radius); overflow: hidden;
            box-shadow: var(--shadow); transition: var(--transition); border: 1px solid rgba(0,0,0,0.03);
            display: flex; flex-direction: column;
        }
        .cms-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .cms-card .card-img { height: 180px; width: 100%; object-fit: cover; }
        .cms-card .card-body { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; }
        .cms-card .cms-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; color: var(--text-dark); line-height: 1.4; }
        .cms-card .cms-title:hover { color: var(--primary); }
        .cms-card .cms-excerpt { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; flex: 1; margin-bottom: 12px; }
        .cms-card .cms-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-light); }
        .cms-card .cms-tag { display: inline-block; padding: 2px 10px; border-radius: 999px; background: rgba(30,64,175,0.06); color: var(--primary); font-weight: 500; font-size: 0.75rem; }
        .cms-empty { text-align: center; padding: 48px 24px; color: var(--text-muted); font-size: 1rem; background: var(--bg-white); border-radius: var(--radius); box-shadow: var(--shadow); }
        /* responsive */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.6rem; }
            .grid-4 { grid-template-columns: repeat(2,1fr); }
            .stats-grid { grid-template-columns: repeat(2,1fr); }
        }
        @media (max-width: 768px) {
            .header-inner { height: 64px; }
            .nav-list { display: none; }
            .mobile-toggle { display: block; }
            .nav-list.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); gap: 4px; }
            .nav-list.open a { padding: 12px 16px; border-radius: var(--radius-sm); width: 100%; }
            .hero { min-height: 70vh; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .section-padding { padding: 56px 0; }
            .section-title { font-size: 1.6rem; }
            .grid-3 { grid-template-columns: 1fr; gap: 20px; }
            .grid-2 { grid-template-columns: 1fr; gap: 24px; }
            .grid-4 { grid-template-columns: 1fr; gap: 16px; }
            .stats-grid { grid-template-columns: repeat(2,1fr); gap: 16px; }
            .cta-section { padding: 40px 24px; }
            .cta-section h2 { font-size: 1.5rem; }
            .footer-inner { grid-template-columns: 1fr; gap: 32px; }
            .step-list { grid-template-columns: 1fr; gap: 24px; }
            .cms-list { grid-template-columns: 1fr; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.7rem; }
            .hero-buttons { flex-direction: column; }
            .btn { width: 100%; justify-content: center; padding: 14px 24px; }
            .stat-number { font-size: 2rem; }
            .section-title { font-size: 1.4rem; }
            .card { padding: 24px 20px; }
            .footer-inner { gap: 24px; }
        }
        /* utility */
        .gap-2 { gap: 8px; }
        .gap-4 { gap: 16px; }
        .mt-2 { margin-top: 8px; }
        .mt-4 { margin-top: 16px; }
        .mt-6 { margin-top: 24px; }
        .mb-2 { margin-bottom: 8px; }
        .mb-4 { margin-bottom: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .w-full { width: 100%; }
        .relative { position: relative; }
        .overflow-hidden { overflow: hidden; }
        .object-cover { object-fit: cover; }

/* roulang page: category1 */
:root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --accent: #e8b84b;
            --accent-light: #f0cc6e;
            --accent-dark: #c9a032;
            --bg-body: #f8f9fb;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --text-primary: #1a2332;
            --text-secondary: #4a5568;
            --text-light: #8899aa;
            --border-color: #e2e8f0;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --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 50px rgba(0,0,0,0.10);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 920px; margin: 0 auto; padding: 0 24px; }

        /* header */
        .header {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226,232,240,0.5);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo span { color: var(--accent); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list li a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .nav-list li a:hover {
            background: rgba(30,58,95,0.06);
            color: var(--primary);
        }
        .nav-list li a.active {
            background: var(--primary);
            color: #fff;
        }
        .nav-cta a {
            background: var(--accent) !important;
            color: var(--primary-dark) !important;
            padding: 10px 24px !important;
            border-radius: 50px !important;
            font-weight: 600 !important;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-cta a:hover {
            background: var(--accent-light) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(232,184,75,0.35);
        }
        .nav-cta a i { font-size: 0.85rem; }
        .mobile-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--primary); cursor: pointer; padding: 4px; }

        /* hero */
        .hero {
            position: relative;
            padding: 100px 0 90px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232,184,75,0.18);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(232,184,75,0.15);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            max-width: 700px;
            letter-spacing: -0.5px;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.75);
            max-width: 580px;
            margin-top: 18px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(232,184,75,0.30);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #fff;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.25);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat { text-align: center; }
        .hero-stat .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
        }
        .hero-stat .num span { color: var(--accent); }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            margin-top: 4px;
        }

        /* section */
        .section { padding: 80px 0; }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(30,58,95,0.06);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.25;
            margin-bottom: 12px;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }
        .section-title-center { text-align: center; }
        .section-sub-center { margin-left: auto; margin-right: auto; text-align: center; }

        /* cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 18px;
        }
        .card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            margin-top: 48px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
            transition: var(--transition);
            text-align: center;
        }
        .step-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(232,184,75,0.30);
        }
        .step-card .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin: 8px 0 16px;
        }
        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* scenarios */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .scenario-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .scenario-body { padding: 22px 24px 26px; }
        .scenario-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .scenario-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* faq */
        .faq-list {
            max-width: 800px;
            margin: 40px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary); }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            user-select: none;
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .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: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-item.active .faq-question i { transform: rotate(180deg); }

        /* cta */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .cta-inner {
            position: relative;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .cta-inner p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.7);
            margin: 16px 0 32px;
            line-height: 1.7;
        }
        .cta-inner .btn-primary {
            font-size: 1.1rem;
            padding: 16px 44px;
        }

        /* footer */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-logo span { color: var(--accent); }
        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer ul li { margin-bottom: 10px; }
        .footer ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer ul li a:hover { color: var(--accent); }
        .footer-copy {
            text-align: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.25);
        }

        /* responsive */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.6rem; }
            .section-title { font-size: 1.9rem; }
        }
        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                box-shadow: 0 20px 40px rgba(0,0,0,0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list li a { padding: 12px 16px; width: 100%; }
            .nav-cta a { justify-content: center; }
            .hero { padding: 70px 0 60px; min-height: auto; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 1.6rem; }
            .section { padding: 56px 0; }
            .section-title { font-size: 1.6rem; }
            .card-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; gap: 28px; }
            .scenario-grid { grid-template-columns: 1fr; }
            .footer-inner { grid-template-columns: 1fr; gap: 32px; }
            .cta-inner h2 { font-size: 1.8rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.7rem; }
            .hero-actions { flex-direction: column; }
            .btn-primary, .btn-outline { width: 100%; justify-content: center; }
            .hero-stats { flex-direction: column; gap: 16px; }
            .hero-stat { text-align: left; display: flex; gap: 12px; align-items: baseline; }
            .section-title { font-size: 1.4rem; }
            .card { padding: 24px 20px; }
            .step-card { padding: 28px 18px; }
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .cta-inner h2 { font-size: 1.5rem; }
        }

/* roulang page: article */
:root {
            --primary: #1a72f5;
            --primary-dark: #135de0;
            --primary-light: #bce0ff;
            --accent: #e47312;
            --accent-dark: #c95a0c;
            --bg-body: #f8fafb;
            --bg-white: #ffffff;
            --text-body: #2e3642;
            --text-muted: #63758f;
            --text-light: #8fa3b7;
            --border-light: #e2e9ee;
            --border-card: #eef2f6;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --transition: all 0.25s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif; background: var(--bg-body); color: var(--text-body); line-height: 1.7; -webkit-font-smoothing: antialiased; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (max-width: 640px) { .container { padding: 0 16px; } }

        /* Header / Nav */
        .site-header { background: rgba(255,255,255,0.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border-light); position: sticky; top: 0; z-index: 100; transition: var(--transition); }
        .site-header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
        .logo { font-size: 1.45rem; font-weight: 700; color: var(--text-body); letter-spacing: -0.3px; display: flex; align-items: center; gap: 4px; }
        .logo span { color: var(--primary); }
        .logo i { color: var(--primary); font-size: 1.3rem; margin-right: 6px; }
        .nav-list { display: flex; align-items: center; list-style: none; gap: 6px; }
        .nav-list li a { padding: 8px 18px; border-radius: 50px; font-size: 0.9rem; font-weight: 500; color: var(--text-muted); transition: var(--transition); white-space: nowrap; }
        .nav-list li a:hover { background: var(--primary-50); color: var(--primary); }
        .nav-list li a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(26,114,245,0.25); }
        .nav-list li a.active:hover { background: var(--primary-dark); color: #fff; }
        .nav-cta a { background: var(--accent) !important; color: #fff !important; padding: 8px 22px !important; border-radius: 50px !important; font-weight: 600 !important; box-shadow: 0 4px 14px rgba(228,115,18,0.3); }
        .nav-cta a:hover { background: var(--accent-dark) !important; box-shadow: 0 6px 20px rgba(228,115,18,0.4) !important; transform: translateY(-1px); }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text-body); cursor: pointer; padding: 4px 8px; border-radius: 8px; }
        .nav-toggle:hover { background: var(--primary-50); }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(14px); padding: 16px 24px 24px; border-bottom: 1px solid var(--border-light); box-shadow: var(--shadow-lg); border-radius: 0 0 var(--radius-lg) var(--radius-lg); gap: 4px; }
            .nav-list.open { display: flex; }
            .nav-list li a { padding: 12px 20px; border-radius: var(--radius-md); width: 100%; text-align: center; }
            .nav-cta { margin-top: 8px; }
            .nav-cta a { text-align: center; width: 100%; }
        }

        /* Hero banner */
        .article-hero { position: relative; padding: 80px 0 60px; background: linear-gradient(135deg, #0a1a3a 0%, #11295a 50%, #184190 100%); overflow: hidden; }
        .article-hero::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.15; mix-blend-mode: overlay; }
        .article-hero::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 50%, rgba(26,114,245,0.2) 0%, transparent 70%); }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-bottom: 20px; flex-wrap: wrap; }
        .article-hero .breadcrumb a { color: rgba(255,255,255,0.6); }
        .article-hero .breadcrumb a:hover { color: #fff; }
        .article-hero .breadcrumb span { color: rgba(255,255,255,0.3); }
        .article-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; color: #fff; line-height: 1.25; max-width: 860px; letter-spacing: -0.5px; margin-bottom: 16px; }
        .article-hero .meta { display: flex; flex-wrap: wrap; gap: 16px 28px; color: rgba(255,255,255,0.7); font-size: 0.9rem; }
        .article-hero .meta i { margin-right: 6px; opacity: 0.6; }
        .article-hero .meta .tag { display: inline-block; background: rgba(255,255,255,0.12); padding: 4px 16px; border-radius: 50px; font-size: 0.8rem; color: rgba(255,255,255,0.8); backdrop-filter: blur(4px); }

        /* Article content */
        .article-section { padding: 56px 0 64px; }
        .article-body { max-width: 820px; margin: 0 auto; background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); padding: 48px 56px; border: 1px solid var(--border-card); }
        @media (max-width: 768px) { .article-body { padding: 28px 20px; } }
        .article-body .content { font-size: 1.05rem; line-height: 1.9; color: var(--text-body); }
        .article-body .content p { margin-bottom: 1.4em; }
        .article-body .content h2, .article-body .content h3 { margin-top: 1.8em; margin-bottom: 0.6em; font-weight: 700; color: #0a1a3a; }
        .article-body .content h2 { font-size: 1.5rem; }
        .article-body .content h3 { font-size: 1.2rem; }
        .article-body .content ul, .article-body .content ol { padding-left: 1.5em; margin-bottom: 1.4em; }
        .article-body .content li { margin-bottom: 0.4em; }
        .article-body .content img { border-radius: var(--radius-md); margin: 1.6em 0; box-shadow: var(--shadow-sm); }
        .article-body .content blockquote { border-left: 4px solid var(--primary); padding: 12px 20px; margin: 1.4em 0; background: var(--primary-50); border-radius: 0 var(--radius-md) var(--radius-md) 0; color: var(--text-muted); font-style: italic; }
        .article-body .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-body .content a:hover { color: var(--primary-dark); }

        /* Not found */
        .not-found { text-align: center; padding: 60px 20px; }
        .not-found i { font-size: 3rem; color: var(--text-light); margin-bottom: 16px; display: block; }
        .not-found p { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found a { display: inline-block; padding: 10px 32px; background: var(--primary); color: #fff; border-radius: 50px; font-weight: 500; }
        .not-found a:hover { background: var(--primary-dark); }

        /* Advantages */
        .advantages-section { padding: 56px 0; background: #fff; border-top: 1px solid var(--border-light); }
        .advantages-section .section-title { text-align: center; margin-bottom: 40px; }
        .advantages-section .section-title h2 { font-size: 1.8rem; font-weight: 700; color: #0a1a3a; }
        .advantages-section .section-title p { color: var(--text-muted); margin-top: 8px; font-size: 1rem; }
        .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        @media (max-width: 768px) { .adv-grid { grid-template-columns: 1fr; gap: 20px; } }
        .adv-card { background: var(--bg-body); border-radius: var(--radius-lg); padding: 32px 24px; text-align: center; border: 1px solid var(--border-card); transition: var(--transition); }
        .adv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .adv-card .icon { width: 56px; height: 56px; background: var(--primary-50); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.4rem; color: var(--primary); }
        .adv-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; color: #0a1a3a; }
        .adv-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; }

        /* Related */
        .related-section { padding: 56px 0; background: var(--bg-body); }
        .related-section .section-title { text-align: center; margin-bottom: 40px; }
        .related-section .section-title h2 { font-size: 1.8rem; font-weight: 700; color: #0a1a3a; }
        .related-section .section-title p { color: var(--text-muted); margin-top: 8px; font-size: 1rem; }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        @media (max-width: 768px) { .related-grid { grid-template-columns: 1fr; gap: 20px; } }
        .related-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border-card); transition: var(--transition); }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card .img-wrap { height: 180px; overflow: hidden; background: var(--neutral-100); }
        .related-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; transition: transform 0.4s ease; }
        .related-card:hover .img-wrap img { transform: scale(1.05); }
        .related-card .info { padding: 20px 20px 24px; }
        .related-card .info h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; color: #0a1a3a; }
        .related-card .info p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }
        .related-card .info .link { display: inline-block; margin-top: 12px; font-size: 0.88rem; font-weight: 500; color: var(--primary); }
        .related-card .info .link i { margin-left: 4px; font-size: 0.75rem; }

        /* CTA */
        .cta-section { padding: 56px 0; background: linear-gradient(135deg, #11295a 0%, #184190 100%); position: relative; overflow: hidden; }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.08; mix-blend-mode: overlay; }
        .cta-section .container { position: relative; z-index: 2; text-align: center; }
        .cta-section h2 { font-size: 1.8rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 28px; font-size: 1rem; }
        .cta-section .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .cta-section .btn-primary { padding: 14px 40px; background: var(--accent); color: #fff; border-radius: 50px; font-weight: 600; font-size: 1rem; box-shadow: 0 4px 20px rgba(228,115,18,0.35); transition: var(--transition); }
        .cta-section .btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(228,115,18,0.45); }
        .cta-section .btn-outline { padding: 14px 40px; background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.3); border-radius: 50px; font-weight: 500; font-size: 1rem; transition: var(--transition); }
        .cta-section .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); }

        /* Footer */
        .footer { background: #0f1a2e; color: rgba(255,255,255,0.75); padding: 48px 0 0; }
        .footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.06); }
        @media (max-width: 768px) { .footer-inner { grid-template-columns: 1fr; gap: 28px; } }
        .footer-logo { font-size: 1.3rem; font-weight: 700; color: #fff; }
        .footer-logo span { color: var(--primary-light); }
        .footer h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer ul { list-style: none; }
        .footer ul li { margin-bottom: 8px; }
        .footer ul li a { color: rgba(255,255,255,0.55); font-size: 0.88rem; }
        .footer ul li a:hover { color: #fff; }
        .footer-copy { padding: 20px 0; text-align: center; font-size: 0.82rem; color: rgba(255,255,255,0.3); }
        .footer-copy a { color: rgba(255,255,255,0.3); }
        .footer-copy a:hover { color: rgba(255,255,255,0.6); }

        /* JSON-LD hidden */
        .json-ld { display: none; }