/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #f59e0b;
            --secondary-light: #fef3c7;
            --accent: #10b981;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-card: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
            --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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif; background: var(--bg-body); color: var(--text-primary); line-height: 1.6; -webkit-font-smoothing: antialiased; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; border: none; background: none; font-family: inherit; }
        input { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .section-title { font-size: 2rem; font-weight: 700; color: var(--text-primary); margin-bottom: 0.75rem; letter-spacing: -0.01em; }
        .section-subtitle { font-size: 1.1rem; color: var(--text-secondary); max-width: 680px; line-height: 1.7; }
        .btn-primary { display: inline-flex; align-items: center; gap: 8px; background: var(--primary); color: #fff; padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 1rem; transition: var(--transition); box-shadow: 0 4px 14px rgba(37,99,235,0.25); border: 2px solid transparent; }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(37,99,235,0.35); }
        .btn-primary:focus { outline: 3px solid var(--primary-light); outline-offset: 2px; }
        .btn-outline { display: inline-flex; align-items: center; gap: 8px; background: transparent; color: #fff; padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 1rem; border: 2px solid rgba(255,255,255,0.7); transition: var(--transition); }
        .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }
        .btn-outline:focus { outline: 3px solid rgba(255,255,255,0.3); outline-offset: 2px; }
        .btn-secondary { display: inline-flex; align-items: center; gap: 8px; background: var(--bg-card); color: var(--primary); padding: 12px 28px; border-radius: 50px; font-weight: 600; font-size: 0.95rem; border: 2px solid var(--border-light); transition: var(--transition); }
        .btn-secondary:hover { border-color: var(--primary); background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
        .card { background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow-card); transition: var(--transition); overflow: hidden; }
        .card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .tag { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 4px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 500; }
        .tag-secondary { background: var(--secondary-light); color: #b45309; }
        .tag-accent { background: #d1fae5; color: #047857; }
        .badge { display: inline-flex; align-items: center; gap: 4px; background: var(--bg-body); padding: 6px 16px; border-radius: 50px; font-size: 0.85rem; color: var(--text-secondary); border: 1px solid var(--border-light); }
        .badge svg { width: 16px; height: 16px; }
        .fade-in { opacity: 0; transform: translateY(24px); animation: fadeUp 0.6s ease forwards; }
        @keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }
        .navbar { background: rgba(255,255,255,0.96); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-light); position: sticky; top: 0; z-index: 100; }
        .navbar-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .nav-logo { font-size: 1.4rem; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; display: flex; align-items: center; gap: 8px; }
        .nav-logo span { color: var(--text-primary); }
        .nav-links { display: flex; align-items: center; gap: 8px; list-style: none; }
        .nav-links a { padding: 8px 18px; border-radius: 50px; font-weight: 500; font-size: 0.95rem; color: var(--text-secondary); transition: var(--transition); }
        .nav-links a:hover { background: var(--primary-light); color: var(--primary); }
        .nav-links a.active { background: var(--primary); color: #fff; }
        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .search-box { position: relative; }
        .search-box input { border: 1px solid var(--border-light); border-radius: 50px; padding: 10px 18px 10px 40px; font-size: 0.9rem; width: 200px; background: var(--bg-body); transition: var(--transition); outline: none; }
        .search-box input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); width: 240px; }
        .search-box svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--text-muted); }
        .nav-cta { background: var(--primary); color: #fff; padding: 10px 24px; border-radius: 50px; font-weight: 600; font-size: 0.9rem; transition: var(--transition); }
        .nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(37,99,235,0.3); }
        .mobile-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
        .mobile-toggle span { width: 26px; height: 2.5px; background: var(--text-primary); border-radius: 4px; transition: var(--transition); }
        .mobile-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
        .mobile-toggle.open span:nth-child(2) { opacity: 0; }
        .mobile-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }
        .hero-section { position: relative; min-height: 600px; display: flex; align-items: center; padding: 100px 0 80px; overflow: hidden; }
        .hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; }
        .hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,42,0.82) 0%, rgba(15,23,42,0.55) 100%); }
        .hero-content { position: relative; z-index: 2; max-width: 780px; }
        .hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,0.12); backdrop-filter: blur(6px); padding: 6px 18px; border-radius: 50px; font-size: 0.85rem; color: rgba(255,255,255,0.9); border: 1px solid rgba(255,255,255,0.15); margin-bottom: 24px; }
        .hero-title { font-size: 3.2rem; font-weight: 800; line-height: 1.2; color: #fff; margin-bottom: 20px; letter-spacing: -0.02em; }
        .hero-title em { font-style: normal; color: #60a5fa; }
        .hero-desc { font-size: 1.2rem; color: rgba(255,255,255,0.8); max-width: 600px; line-height: 1.8; margin-bottom: 36px; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.15); }
        .hero-stat h3 { font-size: 2rem; font-weight: 700; color: #fff; }
        .hero-stat p { font-size: 0.9rem; color: rgba(255,255,255,0.65); }
        .features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
        .feature-card { padding: 36px 28px; border-radius: var(--radius); background: var(--bg-card); box-shadow: var(--shadow-card); transition: var(--transition); border: 1px solid var(--border-light); }
        .feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); border-color: var(--primary-light); }
        .feature-icon { width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; margin-bottom: 20px; }
        .feature-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
        .feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }
        .service-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
        .service-card { display: flex; flex-direction: column; border-radius: var(--radius); overflow: hidden; background: var(--bg-card); box-shadow: var(--shadow-card); transition: var(--transition); }
        .service-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .service-card .img-wrap { height: 220px; overflow: hidden; position: relative; }
        .service-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .service-card:hover .img-wrap img { transform: scale(1.05); }
        .service-card .body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
        .service-card .body h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
        .service-card .body p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; flex: 1; }
        .service-card .body .service-link { margin-top: 16px; color: var(--primary); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
        .news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
        .news-card { border-radius: var(--radius); overflow: hidden; background: var(--bg-card); box-shadow: var(--shadow-card); transition: var(--transition); }
        .news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .news-card .img-wrap { height: 180px; overflow: hidden; position: relative; }
        .news-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
        .news-card:hover .img-wrap img { transform: scale(1.05); }
        .news-card .body { padding: 20px 24px 24px; }
        .news-card .body .meta { display: flex; align-items: center; gap: 12px; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 10px; }
        .news-card .body h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .body p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .body .news-link { margin-top: 12px; display: inline-flex; align-items: center; gap: 4px; color: var(--primary); font-weight: 500; font-size: 0.9rem; }
        .stats-section { background: var(--primary); padding: 80px 0; }
        .stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 32px; text-align: center; }
        .stat-item h2 { font-size: 2.6rem; font-weight: 800; color: #fff; margin-bottom: 4px; }
        .stat-item p { color: rgba(255,255,255,0.75); font-size: 1rem; }
        .steps-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
        .step-card { text-align: center; padding: 32px 20px; border-radius: var(--radius); background: var(--bg-card); box-shadow: var(--shadow-card); position: relative; }
        .step-number { width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; font-weight: 700; margin: 0 auto 18px; }
        .step-card h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
        .step-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }
        .faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-card); border-radius: var(--radius-sm); box-shadow: var(--shadow-card); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question { padding: 20px 28px; display: flex; align-items: center; justify-content: space-between; font-weight: 600; font-size: 1.05rem; cursor: pointer; transition: var(--transition); }
        .faq-question:hover { color: var(--primary); }
        .faq-question svg { width: 22px; height: 22px; color: var(--text-muted); transition: transform 0.3s ease; flex-shrink: 0; }
        .faq-item.open .faq-question svg { transform: rotate(180deg); color: var(--primary); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 28px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }
        .faq-item.open .faq-answer { max-height: 320px; padding: 0 28px 24px; }
        .cta-section { position: relative; padding: 100px 0; overflow: hidden; }
        .cta-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; }
        .cta-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,64,175,0.75) 100%); }
        .cta-content { position: relative; z-index: 2; text-align: center; max-width: 700px; margin: 0 auto; }
        .cta-content h2 { font-size: 2.4rem; font-weight: 800; color: #fff; margin-bottom: 16px; }
        .cta-content p { font-size: 1.15rem; color: rgba(255,255,255,0.8); margin-bottom: 32px; line-height: 1.7; }
        .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .footer { background: #0f172a; color: rgba(255,255,255,0.7); padding: 60px 0 32px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .nav-logo { font-size: 1.3rem; margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
        .footer-col h5 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 18px; }
        .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
        .footer-col ul a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
        .footer-col ul a:hover { color: #60a5fa; padding-left: 4px; }
        .footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; font-size: 0.85rem; color: rgba(255,255,255,0.45); }
        .footer-bottom a { color: rgba(255,255,255,0.45); }
        .footer-bottom a:hover { color: #60a5fa; }
        .empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); font-size: 1rem; }
        .empty-state svg { width: 56px; height: 56px; margin: 0 auto 16px; color: var(--border-light); }
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2,1fr); }
            .service-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: repeat(2,1fr); }
            .stats-grid { grid-template-columns: repeat(2,1fr); }
            .steps-grid { grid-template-columns: repeat(2,1fr); }
            .footer-grid { grid-template-columns: repeat(2,1fr); }
            .hero-title { font-size: 2.6rem; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 20px; }
            .navbar-inner { height: 64px; }
            .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); flex-direction: column; padding: 20px; gap: 4px; border-bottom: 1px solid var(--border-light); box-shadow: 0 16px 40px rgba(0,0,0,0.08); }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 12px 20px; width: 100%; }
            .mobile-toggle { display: flex; }
            .search-box { display: none; }
            .nav-cta { padding: 8px 18px; font-size: 0.85rem; }
            .hero-section { min-height: 480px; padding: 80px 0 60px; }
            .hero-title { font-size: 2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-stats { flex-wrap: wrap; gap: 20px; }
            .hero-stat h3 { font-size: 1.6rem; }
            .features-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .stat-item h2 { font-size: 2rem; }
            .section-title { font-size: 1.6rem; }
            .cta-content h2 { font-size: 1.8rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .hero-actions { flex-direction: column; align-items: flex-start; }
            .hero-actions .btn-primary, .hero-actions .btn-outline { width: 100%; justify-content: center; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.7rem; }
            .hero-stats { flex-direction: column; gap: 12px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stat-item h2 { font-size: 1.6rem; }
            .nav-logo { font-size: 1.1rem; }
            .section-title { font-size: 1.4rem; }
            .cta-content h2 { font-size: 1.5rem; }
            .cta-content p { font-size: 1rem; }
            .btn-primary, .btn-outline { padding: 12px 24px; font-size: 0.9rem; }
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; background: var(--bg-light); color: var(--text-primary); line-height: 1.6; -webkit-font-smoothing: antialiased; }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { cursor: pointer; font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (max-width: 640px) { .container { padding: 0 16px; } }

        /* header */
        .header { background: #ffffff; border-bottom: 1px solid var(--border-light); position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow-sm); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .nav-logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: var(--secondary); letter-spacing: -0.3px; }
        .nav-logo svg { flex-shrink: 0; }
        .nav-links { display: flex; align-items: center; gap: 6px; }
        .nav-links a { padding: 8px 18px; border-radius: 8px; font-size: 15px; font-weight: 500; color: var(--text-secondary); transition: var(--transition); position: relative; }
        .nav-links a:hover { color: var(--primary); background: rgba(37,99,235,0.06); }
        .nav-links a.active { color: var(--primary); background: rgba(37,99,235,0.10); font-weight: 600; }
        .nav-cta { background: var(--primary); color: #fff !important; padding: 10px 24px !important; border-radius: 10px !important; font-weight: 600 !important; font-size: 14px !important; box-shadow: 0 4px 12px rgba(37,99,235,0.3); }
        .nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(37,99,235,0.4) !important; }
        .mobile-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--text-primary); padding: 8px; }
        @media (max-width: 768px) {
            .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 24px 24px; border-bottom: 1px solid var(--border-light); box-shadow: var(--shadow-md); gap: 4px; }
            .nav-links.open { display: flex; }
            .nav-links a { width: 100%; padding: 12px 16px; font-size: 16px; }
            .nav-cta { text-align: center; margin-top: 8px; }
            .mobile-toggle { display: block; }
        }

        /* hero */
        .hero { position: relative; min-height: 580px; display: flex; align-items: center; background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); overflow: hidden; }
        .hero-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; opacity: 0.25; mix-blend-mode: overlay; }
        .hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.60) 100%); }
        .hero-content { position: relative; z-index: 2; max-width: 780px; padding: 80px 0; }
        .hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(37,99,235,0.20); color: #93c5fd; font-size: 14px; font-weight: 500; padding: 6px 18px; border-radius: 50px; border: 1px solid rgba(37,99,235,0.25); margin-bottom: 24px; backdrop-filter: blur(4px); }
        .hero h1 { font-size: 52px; font-weight: 800; line-height: 1.15; color: #ffffff; letter-spacing: -1px; margin-bottom: 20px; }
        .hero h1 span { color: #60a5fa; }
        .hero p { font-size: 18px; color: rgba(255,255,255,0.75); max-width: 600px; line-height: 1.7; margin-bottom: 36px; }
        .hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-btns .btn-primary { background: var(--primary); color: #fff; padding: 14px 36px; border-radius: 12px; font-weight: 600; font-size: 16px; border: none; box-shadow: 0 4px 16px rgba(37,99,235,0.4); transition: var(--transition); }
        .hero-btns .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(37,99,235,0.5); }
        .hero-btns .btn-outline { background: transparent; color: #fff; padding: 14px 36px; border-radius: 12px; font-weight: 600; font-size: 16px; border: 2px solid rgba(255,255,255,0.3); transition: var(--transition); }
        .hero-btns .btn-outline:hover { border-color: #60a5fa; background: rgba(37,99,235,0.15); }
        @media (max-width: 768px) {
            .hero { min-height: 480px; }
            .hero h1 { font-size: 34px; }
            .hero p { font-size: 16px; }
            .hero-content { padding: 60px 0; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 28px; }
            .hero-btns { flex-direction: column; }
            .hero-btns a { text-align: center; }
        }

        /* section common */
        .section { padding: 80px 0; }
        .section-alt { background: #ffffff; }
        .section-header { text-align: center; margin-bottom: 56px; }
        .section-header h2 { font-size: 36px; font-weight: 700; color: var(--text-primary); letter-spacing: -0.5px; margin-bottom: 16px; }
        .section-header p { font-size: 17px; color: var(--text-secondary); max-width: 640px; margin: 0 auto; line-height: 1.7; }
        .section-header .badge-label { display: inline-block; background: rgba(37,99,235,0.08); color: var(--primary); font-size: 13px; font-weight: 600; padding: 4px 16px; border-radius: 50px; margin-bottom: 12px; letter-spacing: 0.3px; }
        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-header h2 { font-size: 28px; }
            .section-header p { font-size: 15px; }
        }

        /* features grid */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card { background: var(--bg-card); border-radius: var(--radius-md); padding: 32px 28px; border: 1px solid var(--border-light); box-shadow: var(--shadow-sm); transition: var(--transition); }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(37,99,235,0.15); }
        .feature-icon { width: 56px; height: 56px; background: rgba(37,99,235,0.08); border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 26px; color: var(--primary); margin-bottom: 20px; }
        .feature-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; color: var(--text-primary); }
        .feature-card p { font-size: 15px; color: var(--text-secondary); line-height: 1.7; }
        @media (max-width: 900px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 600px) { .features-grid { grid-template-columns: 1fr; } }

        /* scenarios */
        .scenarios-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .scenario-card { background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border-light); box-shadow: var(--shadow-sm); transition: var(--transition); }
        .scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .scenario-img { height: 200px; overflow: hidden; }
        .scenario-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
        .scenario-card:hover .scenario-img img { transform: scale(1.05); }
        .scenario-body { padding: 24px 24px 28px; }
        .scenario-body h3 { font-size: 19px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
        .scenario-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
        .scenario-tag { display: inline-block; background: rgba(37,99,235,0.07); color: var(--primary); font-size: 12px; font-weight: 600; padding: 2px 12px; border-radius: 50px; margin-top: 12px; }
        @media (max-width: 900px) { .scenarios-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 600px) { .scenarios-grid { grid-template-columns: 1fr; } }

        /* process */
        .process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .process-step { text-align: center; padding: 32px 16px; background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border-light); position: relative; transition: var(--transition); }
        .process-step:hover { box-shadow: var(--shadow-md); border-color: rgba(37,99,235,0.15); }
        .step-num { width: 48px; height: 48px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; margin: 0 auto 18px; box-shadow: 0 4px 12px rgba(37,99,235,0.3); }
        .process-step h4 { font-size: 17px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
        .process-step p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
        .process-arrow { display: none; }
        @media (max-width: 900px) { .process-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .process-grid { grid-template-columns: 1fr; } }

        /* stats */
        .stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; background: var(--secondary); border-radius: var(--radius-lg); padding: 48px 40px; }
        .stat-item { text-align: center; }
        .stat-number { font-size: 44px; font-weight: 800; color: #60a5fa; letter-spacing: -1px; line-height: 1.2; }
        .stat-label { font-size: 15px; color: rgba(255,255,255,0.65); margin-top: 6px; }
        @media (max-width: 640px) {
            .stats-row { grid-template-columns: 1fr; gap: 28px; padding: 36px 24px; }
            .stat-number { font-size: 36px; }
        }

        /* faq */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: var(--radius-sm); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: rgba(37,99,235,0.15); }
        .faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; background: none; border: none; font-size: 16px; font-weight: 500; color: var(--text-primary); text-align: left; gap: 16px; }
        .faq-question .faq-icon { font-size: 14px; color: var(--text-muted); transition: var(--transition); flex-shrink: 0; }
        .faq-item.active .faq-question .faq-icon { transform: rotate(180deg); color: var(--primary); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease; padding: 0 24px; }
        .faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }
        .faq-answer p { font-size: 15px; color: var(--text-secondary); line-height: 1.7; }

        /* cta */
        .cta-section { background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); position: relative; overflow: hidden; padding: 80px 0; }
        .cta-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.12; mix-blend-mode: overlay; }
        .cta-content { position: relative; z-index: 2; text-align: center; max-width: 640px; margin: 0 auto; }
        .cta-content h2 { font-size: 36px; font-weight: 700; color: #fff; margin-bottom: 16px; letter-spacing: -0.5px; }
        .cta-content p { font-size: 17px; color: rgba(255,255,255,0.7); margin-bottom: 32px; line-height: 1.7; }
        .cta-content .btn-cta { display: inline-block; background: var(--primary); color: #fff; padding: 16px 44px; border-radius: 12px; font-weight: 600; font-size: 17px; border: none; box-shadow: 0 4px 20px rgba(37,99,235,0.4); transition: var(--transition); }
        .cta-content .btn-cta:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(37,99,235,0.5); }
        @media (max-width: 768px) {
            .cta-section { padding: 56px 0; }
            .cta-content h2 { font-size: 28px; }
            .cta-content p { font-size: 15px; }
        }

        /* footer */
        .footer { background: #0f172a; color: rgba(255,255,255,0.8); padding: 60px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .nav-logo { color: #fff; font-size: 22px; margin-bottom: 16px; }
        .footer-brand p { font-size: 14px; color: rgba(255,255,255,0.55); line-height: 1.7; max-width: 320px; }
        .footer-col h5 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 18px; letter-spacing: 0.3px; }
        .footer-col ul { list-style: none; margin: 0; padding: 0; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.55); transition: var(--transition); }
        .footer-col ul li a:hover { color: #60a5fa; }
        .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: 13px; color: rgba(255,255,255,0.4); }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: #60a5fa; }
        @media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } .footer-bottom { flex-direction: column; text-align: center; } }

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

/* roulang page: article */
:root {
            --brand-500: #2563eb;
            --brand-600: #1d4ed8;
            --brand-700: #1e40af;
            --accent-500: #22c55e;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --border-light: #e2e8f0;
            --radius-card: 1rem;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
            --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', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; }
        input, textarea { font-family: inherit; }

        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (max-width: 640px) { .container { padding: 0 16px; } }

        /* header & nav */
        .site-header {
            background: #ffffff;
            border-bottom: 1px solid rgba(226,232,240,0.6);
            box-shadow: 0 1px 8px rgba(0,0,0,0.03);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            background: rgba(255,255,255,0.96);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #1e293b;
            letter-spacing: -0.3px;
            transition: var(--transition);
        }
        .nav-logo:hover { opacity: 0.8; }
        .nav-logo svg { flex-shrink: 0; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--brand-500);
        }
        .nav-links a.active {
            color: var(--brand-500);
            border-bottom-color: var(--brand-500);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border-radius: 999px;
            padding: 0 16px;
            height: 40px;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .nav-search:focus-within {
            background: #ffffff;
            border-color: var(--brand-300);
            box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 160px;
            padding: 6px 0;
        }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-search i { color: var(--text-muted); font-size: 0.9rem; margin-right: 8px; }
        .nav-cta {
            background: var(--brand-500);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            padding: 9px 22px;
            border-radius: 999px;
            border: none;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--brand-600);
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(37,99,235,0.3);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 4px;
        }
        @media (max-width: 900px) {
            .nav-links { display: none; }
            .mobile-toggle { display: block; }
            .nav-actions .nav-search { display: none; }
            .nav-actions .nav-cta { font-size: 0.8rem; padding: 7px 16px; }
            .nav-inner { height: 60px; }
            .nav-logo { font-size: 1.2rem; }
        }
        .mobile-menu {
            display: none;
            background: #ffffff;
            padding: 12px 24px 20px;
            border-top: 1px solid var(--border-light);
        }
        .mobile-menu.open { display: block; }
        .mobile-menu a {
            display: block;
            padding: 12px 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid #f1f5f9;
        }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a.active { color: var(--brand-500); }

        /* hero banner */
        .article-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #1e3a8a 100%);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,41,59,0.70) 100%);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .article-hero .category-tag {
            display: inline-block;
            background: rgba(37,99,235,0.85);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
            backdrop-filter: blur(4px);
        }
        .article-hero h1 {
            font-size: clamp(1.8rem, 4.5vw, 3rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 800px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .article-hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 20px;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .article-hero .meta i { margin-right: 6px; }
        @media (max-width: 640px) {
            .article-hero { min-height: 260px; }
            .article-hero h1 { font-size: 1.6rem; }
        }

        /* content */
        .article-content-wrap {
            padding: 48px 0 64px;
        }
        .article-content {
            max-width: 800px;
            margin: 0 auto;
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 48px 56px;
        }
        .article-content .cms-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: #334155;
        }
        .article-content .cms-body p {
            margin-bottom: 1.2em;
        }
        .article-content .cms-body h2,
        .article-content .cms-body h3 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            font-weight: 700;
            color: #0f172a;
        }
        .article-content .cms-body h2 { font-size: 1.5rem; }
        .article-content .cms-body h3 { font-size: 1.25rem; }
        .article-content .cms-body ul,
        .article-content .cms-body ol {
            margin-bottom: 1.2em;
            padding-left: 1.5em;
        }
        .article-content .cms-body li { margin-bottom: 0.4em; }
        .article-content .cms-body img {
            border-radius: 0.75rem;
            margin: 1.5em 0;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        }
        .article-content .cms-body blockquote {
            border-left: 4px solid var(--brand-500);
            background: #f8fafc;
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 0.75rem 0.75rem 0;
            color: #475569;
            font-style: normal;
        }
        .article-content .cms-body a {
            color: var(--brand-500);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content .cms-body a:hover { color: var(--brand-700); }
        @media (max-width: 768px) {
            .article-content { padding: 28px 24px; }
            .article-content .cms-body { font-size: 1rem; }
        }
        @media (max-width: 640px) {
            .article-content-wrap { padding: 24px 0 40px; }
            .article-content { padding: 20px 16px; border-radius: 0.75rem; }
        }

        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            max-width: 600px;
            margin: 0 auto;
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }

        /* related */
        .related-section {
            padding: 56px 0;
            background: #ffffff;
        }
        .related-section h2 {
            font-size: 1.75rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
            color: #0f172a;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0,0,0,0.1);
        }
        .related-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .related-card .info {
            padding: 20px 22px 24px;
        }
        .related-card .info h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .info p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .info .tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--brand-500);
            background: #eff6ff;
            padding: 2px 12px;
            border-radius: 999px;
            margin-top: 12px;
        }
        @media (max-width: 900px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 640px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-section { padding: 36px 0; }
            .related-section h2 { font-size: 1.4rem; }
        }

        /* cta */
        .article-cta {
            padding: 64px 24px;
            background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
            text-align: center;
            color: #fff;
        }
        .article-cta h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .article-cta p {
            font-size: 1.05rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .article-cta .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .article-cta .btn-primary {
            background: #fff;
            color: var(--brand-600);
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 999px;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
        }
        .article-cta .btn-primary:hover {
            background: #f1f5f9;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.2);
        }
        .article-cta .btn-outline {
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 13px 36px;
            border-radius: 999px;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.5);
            transition: var(--transition);
        }
        .article-cta .btn-outline:hover {
            border-color: #fff;
            background: rgba(255,255,255,0.1);
            transform: translateY(-2px);
        }
        @media (max-width: 640px) {
            .article-cta { padding: 40px 16px; }
            .article-cta h2 { font-size: 1.4rem; }
            .article-cta .btn-primary,
            .article-cta .btn-outline { width: 100%; text-align: center; }
        }

        /* footer */
        .footer {
            background: #0f172a;
            color: rgba(255,255,255,0.8);
            padding: 48px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .nav-logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 340px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col ul { list-style: none; }
        .footer-col li { margin-bottom: 10px; }
        .footer-col a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col a:hover { color: #fff; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
            transition: var(--transition);
        }
        .footer-bottom a:hover { color: #fff; }
        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 640px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* json-ld */
        .jsonld-skip { display: none; }

        /* misc */
        .breadcrumb-simple {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            margin-bottom: 16px;
        }
        .breadcrumb-simple a { color: rgba(255,255,255,0.7); }
        .breadcrumb-simple a:hover { color: #fff; }
        .breadcrumb-simple span { color: rgba(255,255,255,0.5); }