/* roulang page: index */
:root {
            --primary: #C41E3A;
            --primary-dark: #9B162B;
            --primary-light: #E84A5F;
            --secondary: #1A1A2E;
            --accent: #D4AF37;
            --accent-light: #F0D68A;
            --bg-light: #F8F9FA;
            --bg-dark: #0F0F1A;
            --text-dark: #1F2937;
            --text-muted: #6B7280;
            --text-light: #F9FAFB;
            --border-light: #E5E7EB;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.14);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif; background: var(--bg-light); color: var(--text-dark); line-height: 1.6; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .section-title { font-size: 2.25rem; font-weight: 700; line-height: 1.2; margin-bottom: 0.75rem; color: var(--text-dark); }
        .section-subtitle { font-size: 1.125rem; color: var(--text-muted); max-width: 640px; margin-bottom: 2.5rem; }
        .text-primary { color: var(--primary); }
        .bg-primary { background: var(--primary); }
        .text-accent { color: var(--accent); }
        .bg-accent { background: var(--accent); }

        /* Header / Nav */
        .site-header { background: rgba(255,255,255,0.96); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(0,0,0,0.04); position: sticky; top: 0; z-index: 100; }
        .nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; display: flex; align-items: center; gap: 8px; }
        .logo i { font-size: 1.75rem; color: var(--accent); }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a { padding: 8px 18px; border-radius: var(--radius-sm); font-size: 0.95rem; font-weight: 500; color: var(--text-dark); transition: var(--transition); position: relative; }
        .nav-links a:hover { background: rgba(196,30,58,0.06); color: var(--primary); }
        .nav-links a.active { background: var(--primary); color: #fff; }
        .nav-cta { background: var(--primary); color: #fff !important; padding: 10px 28px !important; border-radius: var(--radius-sm); font-weight: 600; }
        .nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(196,30,58,0.35); }
        .mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text-dark); cursor: pointer; padding: 4px; }

        /* Hero */
        .hero { position: relative; min-height: 620px; display: flex; align-items: center; background: var(--secondary); overflow: hidden; }
        .hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; opacity: 0.4; }
        .hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(26,26,46,0.88) 0%, rgba(196,30,58,0.55) 100%); }
        .hero-content { position: relative; z-index: 2; padding: 80px 0; text-align: center; }
        .hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(212,175,55,0.18); color: var(--accent-light); padding: 6px 20px; border-radius: 40px; font-size: 0.85rem; font-weight: 500; margin-bottom: 24px; border: 1px solid rgba(212,175,55,0.25); }
        .hero h1 { font-size: 3.5rem; font-weight: 800; color: #fff; line-height: 1.15; margin-bottom: 20px; letter-spacing: -0.02em; }
        .hero h1 span { color: var(--accent); }
        .hero p { font-size: 1.2rem; color: rgba(255,255,255,0.8); max-width: 640px; margin: 0 auto 36px; }
        .hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .btn-primary { display: inline-flex; align-items: center; gap: 10px; background: var(--primary); color: #fff; padding: 14px 36px; border-radius: var(--radius-sm); font-weight: 600; font-size: 1rem; transition: var(--transition); border: none; cursor: pointer; }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(196,30,58,0.40); }
        .btn-outline { display: inline-flex; align-items: center; gap: 10px; border: 2px solid rgba(255,255,255,0.30); color: #fff; padding: 12px 34px; border-radius: var(--radius-sm); font-weight: 600; font-size: 1rem; transition: var(--transition); background: transparent; }
        .btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

        /* Sections */
        .section-pad { padding: 80px 0; }
        .section-pad-sm { padding: 60px 0; }
        .bg-white { background: #fff; }
        .bg-gray { background: var(--bg-light); }
        .bg-dark { background: var(--bg-dark); color: #fff; }

        /* Feature Cards */
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card { background: #fff; border-radius: var(--radius); padding: 36px 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
        .feature-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: rgba(196,30,58,0.15); }
        .feature-icon { width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 20px; background: rgba(196,30,58,0.08); color: var(--primary); }
        .feature-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
        .feature-card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

        /* Category Grid */
        .cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .cat-card { border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); position: relative; }
        .cat-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
        .cat-card img { width: 100%; height: 200px; object-fit: cover; }
        .cat-card-body { padding: 20px 24px 24px; }
        .cat-card-body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 6px; }
        .cat-card-body p { color: var(--text-muted); font-size: 0.9rem; }

        /* CMS List */
        .cms-list { display: grid; grid-template-columns: 1fr; gap: 20px; }
        .cms-item { display: flex; gap: 24px; background: #fff; padding: 24px 28px; border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
        .cms-item:hover { box-shadow: var(--shadow); transform: translateX(4px); border-color: rgba(196,30,58,0.12); }
        .cms-item .info { flex: 1; }
        .cms-item .info h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; }
        .cms-item .info h4 a:hover { color: var(--primary); }
        .cms-item .info p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.5; }
        .cms-item .meta { display: flex; gap: 16px; margin-top: 10px; font-size: 0.8rem; color: var(--text-muted); }
        .cms-item .meta span { display: flex; align-items: center; gap: 4px; }
        .cms-empty { text-align: center; padding: 40px 20px; color: var(--text-muted); background: #fff; border-radius: var(--radius); border: 1px dashed var(--border-light); }

        /* Stats */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; text-align: center; }
        .stat-item h4 { font-size: 2.5rem; font-weight: 800; color: var(--primary); line-height: 1.1; }
        .stat-item p { color: var(--text-muted); font-size: 1rem; margin-top: 6px; }

        /* Advantages */
        .adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .adv-card { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius); padding: 32px 24px; transition: var(--transition); }
        .adv-card:hover { background: rgba(255,255,255,0.08); border-color: rgba(212,175,55,0.25); transform: translateY(-3px); }
        .adv-card .num { font-size: 2rem; font-weight: 800; color: var(--accent); opacity: 0.6; margin-bottom: 12px; }
        .adv-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
        .adv-card p { color: rgba(255,255,255,0.65); font-size: 0.9rem; line-height: 1.6; }

        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: #fff; border-radius: var(--radius-sm); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
        .faq-item summary { padding: 18px 24px; font-weight: 600; font-size: 1rem; cursor: pointer; display: flex; align-items: center; gap: 12px; transition: var(--transition); }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::before { content: '\f059'; font-family: 'Font Awesome 6 Free'; font-weight: 400; color: var(--primary); font-size: 1.1rem; }
        .faq-item[open] summary { background: rgba(196,30,58,0.03); }
        .faq-item .faq-body { padding: 0 24px 18px 52px; color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }

        /* CTA */
        .cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); padding: 60px 0; text-align: center; }
        .cta-section h2 { font-size: 2.25rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-section .btn-outline { border-color: rgba(255,255,255,0.4); }
        .cta-section .btn-outline:hover { border-color: #fff; color: #fff; }

        /* Footer */
        .site-footer { background: var(--secondary); color: rgba(255,255,255,0.7); padding: 48px 0 32px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .logo { color: #fff; margin-bottom: 12px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
        .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul { list-style: none; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 0.9rem; opacity: 0.75; transition: var(--transition); }
        .footer-col ul li a:hover { opacity: 1; color: var(--accent); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); margin-top: 40px; padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; }

        /* Mobile */
        @media (max-width: 1024px) {
            .feature-grid, .cat-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 24px; box-shadow: 0 20px 40px rgba(0,0,0,0.10); border-bottom: 1px solid var(--border-light); }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; padding: 12px 16px; }
            .nav-cta { text-align: center; }
            .mobile-toggle { display: block; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .hero { min-height: 480px; }
            .section-title { font-size: 1.75rem; }
            .feature-grid, .cat-grid, .adv-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .stat-item h4 { font-size: 2rem; }
            .cms-item { flex-direction: column; gap: 12px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-pad { padding: 48px 0; }
            .section-pad-sm { padding: 36px 0; }
            .hero-actions { flex-direction: column; align-items: center; }
            .btn-primary, .btn-outline { width: 100%; max-width: 300px; justify-content: center; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.75rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stat-item h4 { font-size: 1.6rem; }
            .logo { font-size: 1.2rem; }
        }

/* roulang page: article */
:root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f1f33;
            --secondary: #c8a45c;
            --secondary-light: #e0c488;
            --accent: #d4a843;
            --bg-light: #f8f7f4;
            --bg-white: #ffffff;
            --text-dark: #1a1a2e;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --border-light: #e5e7eb;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Inter', system-ui, -apple-system, sans-serif; background: var(--bg-light); color: var(--text-dark); line-height: 1.7; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        a { text-decoration: none; color: var(--primary); transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        .article-content h1, .article-content h2, .article-content h3, .article-content h4 { margin-top: 1.8em; margin-bottom: 0.8em; font-weight: 700; color: var(--primary-dark); line-height: 1.3; }
        .article-content h1 { font-size: 2rem; }
        .article-content h2 { font-size: 1.6rem; border-bottom: 2px solid var(--secondary-light); padding-bottom: 0.4em; }
        .article-content h3 { font-size: 1.3rem; }
        .article-content p { margin-bottom: 1.2em; font-size: 1.05rem; color: #374151; }
        .article-content ul, .article-content ol { margin-bottom: 1.2em; padding-left: 1.8em; }
        .article-content li { margin-bottom: 0.5em; font-size: 1.02rem; }
        .article-content a { color: var(--primary-light); font-weight: 500; border-bottom: 1px solid transparent; }
        .article-content a:hover { border-bottom-color: var(--primary-light); }
        .article-content blockquote { border-left: 4px solid var(--secondary); padding: 0.8em 1.2em; margin: 1.5em 0; background: rgba(200, 164, 92, 0.08); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-style: italic; color: #4b5563; }
        .article-content img { border-radius: var(--radius-md); margin: 1.8em auto; box-shadow: var(--shadow-md); }
        .article-content table { border-collapse: collapse; width: 100%; margin: 1.5em 0; font-size: 0.95rem; }
        .article-content th, .article-content td { border: 1px solid var(--border-light); padding: 0.75em 1em; text-align: left; }
        .article-content th { background: var(--primary); color: #fff; font-weight: 600; }
        .article-content td { background: #fff; }
        .article-content code { background: #f3f4f6; padding: 0.2em 0.5em; border-radius: 4px; font-size: 0.92em; font-family: 'Fira Code', monospace; }
        .article-content pre { background: #1e293b; color: #e2e8f0; padding: 1.5em; border-radius: var(--radius-md); overflow-x: auto; margin: 1.5em 0; font-size: 0.92rem; }
        .article-content pre code { background: none; color: inherit; padding: 0; }
        .article-content hr { border: none; height: 1px; background: var(--border-light); margin: 2em 0; }
        .site-header { background: rgba(255,255,255,0.95); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(229,231,235,0.6); position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .logo { font-size: 1.5rem; font-weight: 800; color: var(--primary-dark); display: flex; align-items: center; gap: 10px; }
        .logo i { color: var(--secondary); font-size: 1.6rem; }
        .nav-links { display: flex; align-items: center; gap: 32px; }
        .nav-links a { font-size: 0.95rem; font-weight: 500; color: var(--text-muted); position: relative; padding: 4px 0; }
        .nav-links a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--secondary); transition: var(--transition); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a:hover { color: var(--primary-dark); }
        .nav-links a.active { color: var(--primary-dark); font-weight: 600; }
        .nav-links a.active::after { width: 100%; background: var(--secondary); }
        .nav-cta { background: var(--secondary) !important; color: #fff !important; padding: 10px 24px !important; border-radius: 50px; font-weight: 600 !important; display: flex; align-items: center; gap: 8px; transition: var(--transition); }
        .nav-cta:hover { background: var(--accent) !important; transform: translateY(-1px); box-shadow: 0 4px 15px rgba(200,164,92,0.4); }
        .nav-cta i { font-size: 0.9rem; }
        .mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; background: none; border: none; }
        .mobile-toggle span { width: 28px; height: 2.5px; background: var(--text-dark); border-radius: 4px; transition: var(--transition); }
        .article-hero { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%); padding: 80px 0 60px; position: relative; overflow: hidden; }
        .article-hero::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.12; mix-blend-mode: overlay; }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 20px; }
        .article-hero .breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-hero .breadcrumb a:hover { color: var(--secondary); }
        .article-hero .breadcrumb i { font-size: 0.7rem; }
        .article-hero h1 { font-size: 2.4rem; font-weight: 800; color: #fff; line-height: 1.3; max-width: 800px; margin-bottom: 16px; }
        .article-hero .meta { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; color: rgba(255,255,255,0.75); font-size: 0.95rem; }
        .article-hero .meta i { margin-right: 6px; }
        .article-hero .meta .tag { background: rgba(200,164,92,0.2); color: var(--secondary-light); padding: 4px 14px; border-radius: 50px; font-size: 0.85rem; font-weight: 500; }
        .main-wrap { padding: 48px 0 80px; }
        .article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start; }
        .article-body { background: #fff; border-radius: var(--radius-md); padding: 40px 44px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); }
        .article-body .article-content { font-size: 1.05rem; line-height: 1.8; }
        .article-sidebar .sidebar-card { background: #fff; border-radius: var(--radius-md); padding: 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); margin-bottom: 24px; }
        .article-sidebar .sidebar-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
        .article-sidebar .sidebar-card h3 i { color: var(--secondary); font-size: 1.1rem; }
        .article-sidebar .sidebar-card ul { list-style: none; }
        .article-sidebar .sidebar-card ul li { border-bottom: 1px solid var(--border-light); padding: 12px 0; }
        .article-sidebar .sidebar-card ul li:last-child { border-bottom: none; }
        .article-sidebar .sidebar-card ul li a { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; color: var(--text-dark); }
        .article-sidebar .sidebar-card ul li a:hover { color: var(--primary-light); padding-left: 4px; }
        .article-sidebar .sidebar-card ul li a i { color: var(--secondary); font-size: 0.8rem; }
        .article-sidebar .sidebar-cta { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); color: #fff; border: none; }
        .article-sidebar .sidebar-cta h3 { color: #fff; }
        .article-sidebar .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.92rem; margin-bottom: 18px; }
        .article-sidebar .sidebar-cta .btn { display: inline-flex; align-items: center; gap: 8px; background: var(--secondary); color: #fff; padding: 12px 28px; border-radius: 50px; font-weight: 600; font-size: 0.95rem; transition: var(--transition); }
        .article-sidebar .sidebar-cta .btn:hover { background: var(--accent); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(200,164,92,0.4); }
        .article-nav { display: flex; justify-content: space-between; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border-light); }
        .article-nav a { display: flex; align-items: center; gap: 8px; font-weight: 500; color: var(--primary); padding: 10px 20px; border-radius: 50px; border: 1px solid var(--border-light); transition: var(--transition); }
        .article-nav a:hover { border-color: var(--secondary); background: rgba(200,164,92,0.06); }
        .article-nav .nav-disabled { opacity: 0.3; pointer-events: none; }
        .site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.8); padding: 60px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand p { font-size: 0.92rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
        .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 18px; }
        .footer-col ul { list-style: none; }
        .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(--secondary); padding-left: 4px; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 24px 0; display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; color: rgba(255,255,255,0.5); flex-wrap: wrap; gap: 12px; }
        .footer-bottom i { margin-right: 6px; }
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; flex-direction: column; background: #fff; position: absolute; top: 72px; left: 0; width: 100%; padding: 20px 24px; gap: 16px; box-shadow: var(--shadow-lg); border-top: 1px solid var(--border-light); }
            .nav-links.open { display: flex; }
            .mobile-toggle { display: flex; }
            .article-hero { padding: 48px 0 36px; }
            .article-hero h1 { font-size: 1.7rem; }
            .article-body { padding: 24px 20px; }
            .article-content h1 { font-size: 1.5rem; }
            .article-content h2 { font-size: 1.25rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .header-inner { height: 64px; }
            .logo { font-size: 1.2rem; }
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.4rem; }
            .article-hero .meta { font-size: 0.85rem; gap: 12px; }
            .article-body { padding: 18px 14px; }
            .article-content p { font-size: 0.98rem; }
            .article-nav { flex-direction: column; gap: 12px; }
            .article-nav a { justify-content: center; }
        }

/* roulang page: category1 */
:root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --accent: #e8a838;
            --accent-hover: #d4952f;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --text-dark: #1a1a2e;
            --text-body: #3d3d4a;
            --text-muted: #7a7a8a;
            --border-light: #e8ecf2;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 28px rgba(0,0,0,0.07);
            --shadow-lg: 0 20px 48px rgba(0,0,0,0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif; background: var(--bg-light); color: var(--text-body); line-height: 1.7; -webkit-font-smoothing: antialiased; }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        /* header & nav */
        .site-header { background: var(--bg-white); border-bottom: 1px solid var(--border-light); position: sticky; top: 0; z-index: 100; backdrop-filter: blur(12px); background: rgba(255,255,255,0.95); box-shadow: 0 1px 4px rgba(0,0,0,0.02); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .logo { display: flex; align-items: center; gap: 10px; font-size: 1.4rem; font-weight: 700; color: var(--primary-dark); letter-spacing: -0.02em; }
        .logo i { color: var(--accent); font-size: 1.6rem; }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a { padding: 8px 18px; border-radius: 40px; font-size: 0.95rem; font-weight: 500; color: var(--text-body); transition: var(--transition); position: relative; }
        .nav-links a:hover { color: var(--primary); background: rgba(30,58,95,0.06); }
        .nav-links a.active { color: var(--bg-white); background: var(--primary); box-shadow: 0 4px 12px rgba(30,58,95,0.25); }
        .nav-links a.active:hover { background: var(--primary-dark); }
        .nav-links a.nav-cta { background: var(--accent); color: var(--primary-dark); font-weight: 600; padding: 8px 24px; box-shadow: 0 4px 14px rgba(232,168,56,0.35); }
        .nav-links a.nav-cta:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(232,168,56,0.45); }
        .nav-links a.nav-cta i { margin-right: 6px; }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; background: none; border: none; }
        .hamburger span { width: 26px; height: 2.5px; background: var(--text-dark); border-radius: 4px; transition: var(--transition); }
        /* hero */
        .category-hero { position: relative; min-height: 380px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%); overflow: hidden; padding: 80px 0 72px; }
        .category-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; }
        .category-hero::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 50%, rgba(232,168,56,0.08) 0%, transparent 70%); }
        .category-hero .hero-content { position: relative; z-index: 2; text-align: center; max-width: 780px; padding: 0 20px; }
        .category-hero h1 { font-size: 3.2rem; font-weight: 800; color: #fff; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 16px; text-shadow: 0 2px 20px rgba(0,0,0,0.15); }
        .category-hero p { font-size: 1.2rem; color: rgba(255,255,255,0.85); margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .category-hero .hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(232,168,56,0.2); border: 1px solid rgba(232,168,56,0.3); color: var(--accent); padding: 6px 18px; border-radius: 40px; font-size: 0.85rem; font-weight: 500; margin-bottom: 20px; backdrop-filter: blur(4px); }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
        .hero-actions .btn-primary { background: var(--accent); color: var(--primary-dark); padding: 14px 40px; border-radius: 40px; font-weight: 700; font-size: 1.05rem; box-shadow: 0 8px 28px rgba(232,168,56,0.4); transition: var(--transition); border: none; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
        .hero-actions .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(232,168,56,0.5); }
        .hero-actions .btn-outline { background: transparent; color: #fff; padding: 14px 36px; border-radius: 40px; font-weight: 600; font-size: 1.05rem; border: 2px solid rgba(255,255,255,0.3); transition: var(--transition); cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
        .hero-actions .btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(232,168,56,0.08); }
        /* section common */
        .section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 56px; }
        .section-title h2 { font-size: 2.4rem; font-weight: 700; color: var(--primary-dark); letter-spacing: -0.02em; margin-bottom: 12px; }
        .section-title p { color: var(--text-muted); font-size: 1.1rem; max-width: 560px; margin: 0 auto; }
        .section-title .title-accent { display: inline-block; width: 48px; height: 4px; background: var(--accent); border-radius: 4px; margin-top: 12px; }
        .bg-white { background: var(--bg-white); }
        .bg-light { background: var(--bg-light); }
        /* cards */
        .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; }
        .card { background: var(--bg-white); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .card-img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
        .card-body { padding: 24px 22px 28px; }
        .card-body h3 { font-size: 1.25rem; font-weight: 600; color: var(--primary-dark); margin-bottom: 8px; }
        .card-body p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.6; }
        .card-body .card-tag { display: inline-block; background: rgba(30,58,95,0.08); color: var(--primary); font-size: 0.75rem; font-weight: 600; padding: 2px 12px; border-radius: 20px; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.03em; }
        /* steps */
        .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; counter-reset: step; }
        .step-item { text-align: center; padding: 32px 20px; background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); position: relative; }
        .step-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .step-item::before { counter-increment: step; content: counter(step); position: absolute; top: -14px; left: 50%; transform: translateX(-50%); width: 36px; height: 36px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1rem; box-shadow: 0 4px 12px rgba(30,58,95,0.2); }
        .step-item .step-icon { font-size: 2.4rem; color: var(--primary-light); margin-bottom: 16px; margin-top: 10px; }
        .step-item h4 { font-size: 1.15rem; font-weight: 600; color: var(--primary-dark); margin-bottom: 6px; }
        .step-item p { font-size: 0.92rem; color: var(--text-muted); }
        /* safety list */
        .safety-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
        .safety-item { display: flex; align-items: flex-start; gap: 16px; padding: 20px 24px; background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); }
        .safety-item:hover { box-shadow: var(--shadow-md); }
        .safety-item .safety-icon { width: 44px; height: 44px; border-radius: 12px; background: rgba(30,58,95,0.08); display: flex; align-items: center; justify-content: center; font-size: 1.3rem; color: var(--primary); flex-shrink: 0; }
        .safety-item h4 { font-size: 1.05rem; font-weight: 600; color: var(--primary-dark); margin-bottom: 2px; }
        .safety-item p { font-size: 0.9rem; color: var(--text-muted); }
        /* faq */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question { padding: 20px 28px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600; color: var(--primary-dark); font-size: 1.05rem; transition: var(--transition); user-select: none; }
        .faq-question:hover { background: rgba(30,58,95,0.02); }
        .faq-question i { color: var(--accent); font-size: 0.9rem; transition: var(--transition); }
        .faq-answer { padding: 0 28px 20px; color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; display: none; }
        .faq-item.open .faq-answer { display: block; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        /* cta */
        .cta-section { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); padding: 72px 0; text-align: center; 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; }
        .cta-section h2 { font-size: 2.6rem; font-weight: 700; color: #fff; margin-bottom: 12px; letter-spacing: -0.02em; }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.15rem; max-width: 520px; margin: 0 auto 32px; }
        .cta-section .btn-cta { background: var(--accent); color: var(--primary-dark); padding: 16px 48px; border-radius: 40px; font-weight: 700; font-size: 1.1rem; box-shadow: 0 8px 28px rgba(232,168,56,0.35); transition: var(--transition); border: none; cursor: pointer; display: inline-flex; align-items: center; gap: 10px; }
        .cta-section .btn-cta:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(232,168,56,0.5); }
        /* footer */
        .site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 56px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.06); }
        .footer-brand .logo { color: #fff; font-size: 1.3rem; margin-bottom: 12px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.92rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.02em; }
        .footer-col ul { list-style: none; }
        .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; flex-wrap: wrap; justify-content: space-between; align-items: center; padding: 24px 0 32px; font-size: 0.85rem; color: rgba(255,255,255,0.4); }
        .footer-bottom i { margin-right: 6px; color: var(--accent); }
        /* responsive */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .category-hero h1 { font-size: 2.6rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .nav-links { position: fixed; top: 72px; left: 0; right: 0; background: var(--bg-white); flex-direction: column; padding: 20px 24px; gap: 6px; box-shadow: 0 20px 40px rgba(0,0,0,0.10); border-bottom: 1px solid var(--border-light); transform: translateY(-110%); opacity: 0; transition: var(--transition); pointer-events: none; border-radius: 0 0 var(--radius-md) var(--radius-md); }
            .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-links a { width: 100%; text-align: center; padding: 12px 18px; }
            .nav-links a.nav-cta { margin-top: 6px; }
            .category-hero { min-height: 300px; padding: 60px 0 56px; }
            .category-hero h1 { font-size: 2rem; }
            .category-hero p { font-size: 1rem; }
            .section { padding: 56px 0; }
            .section-title h2 { font-size: 1.8rem; }
            .card-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .safety-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
            .hero-actions .btn-primary, .hero-actions .btn-outline { padding: 12px 28px; font-size: 0.95rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .card-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .category-hero h1 { font-size: 1.6rem; }
            .section-title h2 { font-size: 1.5rem; }
            .cta-section h2 { font-size: 1.8rem; }
            .cta-section .btn-cta { padding: 14px 32px; font-size: 1rem; }
        }
        .scroll-top { position: fixed; bottom: 32px; right: 32px; width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; box-shadow: var(--shadow-md); transition: var(--transition); border: none; cursor: pointer; z-index: 50; opacity: 0; visibility: hidden; }
        .scroll-top.visible { opacity: 1; visibility: visible; }
        .scroll-top:hover { background: var(--primary-light); transform: translateY(-3px); }