/* roulang page: index */
:root {
            --primary: #1e3a5f;
            --primary-light: #2d5a8e;
            --primary-dark: #0f2440;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-light: #f8fafc;
            --bg-dark: #0f172a;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
        }
        * { margin:0; padding:0; box-sizing:border-box; }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            color: var(--text-primary);
            background: var(--bg-light);
            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:inherit; transition:var(--transition); }
        input, textarea { font:inherit; }

        .container { max-width:1200px; margin:0 auto; padding:0 24px; }

        /* Header & Nav */
        .site-header {
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226,232,240,0.6);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .logo span { color: var(--accent); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-links li a {
            display: block;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .nav-links li a:hover,
        .nav-links li a.active {
            color: var(--primary);
            background: rgba(30,58,95,0.06);
        }
        .nav-links li a.active { font-weight:600; color:var(--primary); }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border-radius: 40px;
            padding: 0 16px;
            height: 40px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .search-box:focus-within {
            background: #fff;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(30,58,95,0.08);
        }
        .search-box i { color: var(--text-light); font-size: 0.9rem; }
        .search-box input {
            border: none;
            background: transparent;
            padding: 0 10px;
            width: 140px;
            outline: none;
            font-size: 0.9rem;
            color: var(--text-primary);
        }
        .search-box input::placeholder { color: var(--text-light); }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(30,58,95,0.20);
        }
        .btn-primary:active { transform:translateY(0); }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
        }
        .btn-accent:hover {
            background: var(--accent-light);
            box-shadow: 0 8px 20px rgba(245,158,11,0.30);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--border);
            color: var(--text-secondary);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(30,58,95,0.04);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 4px 8px;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.85) 0%, rgba(30,58,95,0.70) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 80px 0;
        }
        .hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.5px;
            max-width: 780px;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 20px 0 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat { text-align:left; }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
        }

        /* Section general */
        .section { padding: 80px 0; }
        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 700;
            color: var(--primary);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-sub {
            text-align: center;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
        }

        /* Cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }
        .card-body { padding: 24px; }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .card-body p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .card-tag {
            display: inline-block;
            background: rgba(30,58,95,0.08);
            color: var(--primary-light);
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 10px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-top: 12px;
        }

        /* Feature icons */
        .feature-card {
            text-align: center;
            padding: 40px 24px;
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(30,58,95,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
        }

        /* Content list */
        .content-list { display:flex; flex-direction:column; gap:16px; }
        .content-item {
            display: flex;
            gap: 20px;
            background: #fff;
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            align-items: flex-start;
        }
        .content-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
        .content-item .thumb {
            width: 140px;
            min-height: 90px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .content-item .info { flex:1; }
        .content-item .info h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .content-item .info p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .content-item .meta {
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: 8px;
        }

        /* FAQ */
        .faq-grid {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }
        .faq-q i { color: var(--text-light); transition: var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-q i { transform: rotate(180deg); color: var(--accent); }
        .faq-a {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item:not(.open) .faq-a { display: none; }

        /* CTA */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section .overlay {
            position: absolute; inset:0;
            background: linear-gradient(135deg, rgba(15,36,64,0.88), rgba(30,58,95,0.78));
        }
        .cta-section .container { position:relative; z-index:2; text-align:center; padding:80px 24px; }
        .cta-section h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.8rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.85);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .logo { color:#fff; font-size:1.2rem; }
        .footer-brand p { margin-top:12px; font-size:0.9rem; line-height:1.7; max-width:360px; }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            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;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            margin-top: 40px;
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display:none; }
            .nav-right .search-box { display:none; }
            .mobile-toggle { display:block; }
            .nav-wrap { height:64px; }
            .hero { min-height:460px; }
            .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; }
            .card-grid { grid-template-columns:1fr; }
            .content-item { flex-direction:column; }
            .content-item .thumb { width:100%; aspect-ratio:16/9; }
            .footer-grid { grid-template-columns:1fr; gap:28px; }
        }
        @media (max-width: 520px) {
            .container { padding:0 16px; }
            .hero h1 { font-size:1.7rem; }
            .hero-actions { flex-direction:column; }
            .hero-actions .btn-primary { width:100%; justify-content:center; }
            .hero-stats { flex-direction:column; gap:14px; }
            .nav-wrap { height:58px; }
            .logo { font-size:1.1rem; }
            .section-title { font-size:1.4rem; }
        }
        /* mobile nav panel */
        .mobile-nav {
            display:none;
            position:fixed;
            top:0; left:0; width:100%; height:100%;
            background:rgba(15,36,64,0.95);
            backdrop-filter:blur(8px);
            z-index:200;
            flex-direction:column;
            align-items:center;
            justify-content:center;
            gap:24px;
        }
        .mobile-nav.open { display:flex; }
        .mobile-nav a {
            color:#fff;
            font-size:1.3rem;
            font-weight:500;
            padding:12px 32px;
            border-radius:var(--radius-sm);
            transition:var(--transition);
        }
        .mobile-nav a:hover { background:rgba(255,255,255,0.08); }
        .mobile-nav .close-btn {
            position:absolute;
            top:20px; right:24px;
            background:none;
            border:none;
            color:#fff;
            font-size:2rem;
        }
        /* live bar */
        .live-bar {
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            color: #1e293b;
            padding: 8px 0;
            font-size: 0.85rem;
            font-weight: 500;
            text-align: center;
            overflow: hidden;
            white-space: nowrap;
        }
        .live-bar i { margin: 0 6px; }
        .live-bar span { display:inline-block; padding:0 30px; }
        .badge {
            display:inline-block;
            background: var(--accent);
            color: #1e293b;
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .badge-green { background:#dcfce7; color:#166534; }
        .badge-blue { background:#dbeafe; color:#1e40af; }
        .gap-2 { gap:8px; }
        .text-center { text-align:center; }

/* roulang page: article */
:root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #fadbd8;
            --accent: #f39c12;
            --accent-dark: #e67e22;
            --bg-dark: #0f0f1a;
            --bg-section: #f8f9fc;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #7a7a9a;
            --border-light: #e8e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --transition: 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,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif; background:#ffffff; color:var(--text-primary); line-height:1.7; -webkit-font-smoothing:antialiased; }
        img { max-width:100%; height:auto; display:block; }
        a { color:inherit; text-decoration:none; transition:var(--transition); }
        .container { max-width:1200px; margin:0 auto; padding:0 24px; }
        /* header */
        .site-header { position:sticky; top:0; z-index:100; background:rgba(15,15,26,0.92); backdrop-filter:blur(18px) saturate(1.2); border-bottom:1px solid rgba(255,255,255,0.06); padding:0 0; height:72px; display:flex; align-items:center; }
        .nav-wrap { display:flex; align-items:center; justify-content:space-between; width:100%; height:100%; }
        .logo { font-size:1.35rem; font-weight:700; color:#ffffff; letter-spacing:-0.3px; display:flex; align-items:center; gap:2px; }
        .logo span { color:var(--primary); }
        .nav-links { display:flex; align-items:center; gap:36px; list-style:none; margin:0; }
        .nav-links li a { color:rgba(255,255,255,0.75); font-size:0.95rem; font-weight:500; padding:6px 0; position:relative; transition:var(--transition); }
        .nav-links li a:hover { color:#ffffff; }
        .nav-links li a::after { content:''; position:absolute; bottom:-2px; left:0; width:0; height:2px; background:var(--primary); border-radius:2px; transition:var(--transition); }
        .nav-links li a:hover::after { width:100%; }
        .nav-links li a.active { color:#ffffff; }
        .nav-links li a.active::after { width:100%; background:var(--primary); }
        .nav-right { display:flex; align-items:center; gap:16px; }
        .search-box { display:flex; align-items:center; background:rgba(255,255,255,0.08); border:1px solid rgba(255,255,255,0.1); border-radius:40px; padding:0 16px; height:40px; transition:var(--transition); min-width:200px; }
        .search-box:focus-within { border-color:var(--primary); background:rgba(255,255,255,0.12); }
        .search-box i { color:rgba(255,255,255,0.4); font-size:0.85rem; margin-right:10px; }
        .search-box input { background:none; border:none; outline:none; color:#ffffff; font-size:0.9rem; width:100%; }
        .search-box input::placeholder { color:rgba(255,255,255,0.35); }
        .btn-primary { display:inline-flex; align-items:center; gap:8px; padding:10px 24px; border-radius:40px; font-weight:600; font-size:0.9rem; transition:var(--transition); cursor:pointer; border:none; }
        .btn-accent { background:var(--primary); color:#ffffff; }
        .btn-accent:hover { background:var(--primary-dark); transform:translateY(-2px); box-shadow:0 8px 24px rgba(231,76,60,0.35); }
        .btn-outline { background:transparent; border:2px solid rgba(255,255,255,0.2); color:#ffffff; }
        .btn-outline:hover { border-color:var(--primary); color:var(--primary); }
        .mobile-toggle { display:none; background:none; border:none; color:#ffffff; font-size:1.5rem; cursor:pointer; padding:4px 8px; }
        /* mobile nav overlay */
        .mobile-nav-overlay { display:none; position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(15,15,26,0.98); z-index:200; flex-direction:column; align-items:center; justify-content:center; gap:32px; }
        .mobile-nav-overlay.open { display:flex; }
        .mobile-nav-overlay a { color:#ffffff; font-size:1.5rem; font-weight:600; }
        .mobile-nav-overlay a:hover { color:var(--primary); }
        .mobile-nav-overlay .close-btn { position:absolute; top:24px; right:30px; font-size:2rem; color:#ffffff; background:none; border:none; cursor:pointer; }
        /* hero banner (inner) */
        .article-hero { position:relative; padding:80px 0 60px; background:var(--bg-dark); overflow:hidden; }
        .article-hero::before { content:''; position:absolute; inset:0; background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat; opacity:0.18; }
        .article-hero::after { content:''; position:absolute; inset:0; background:linear-gradient(135deg, rgba(15,15,26,0.88) 0%, rgba(15,15,26,0.6) 100%); }
        .article-hero .container { position:relative; z-index:2; }
        .article-hero h1 { font-size:2.4rem; font-weight:800; color:#ffffff; line-height:1.3; max-width:860px; margin-bottom:16px; letter-spacing:-0.5px; }
        .article-hero .meta { display:flex; flex-wrap:wrap; gap:20px; color:rgba(255,255,255,0.6); font-size:0.9rem; }
        .article-hero .meta i { margin-right:6px; color:var(--primary); }
        .article-hero .meta span { display:inline-flex; align-items:center; }
        .article-hero .category-badge { display:inline-block; background:var(--primary); color:#ffffff; font-size:0.75rem; font-weight:700; padding:4px 14px; border-radius:40px; letter-spacing:0.3px; text-transform:uppercase; margin-bottom:16px; }
        /* main content */
        .article-main { padding:60px 0 80px; background:var(--bg-section); }
        .article-content { max-width:860px; margin:0 auto; background:var(--bg-card); border-radius:var(--radius-lg); box-shadow:var(--shadow-md); padding:48px 52px; }
        .article-content .content-body { font-size:1.05rem; line-height:1.85; color:var(--text-primary); }
        .article-content .content-body p { margin-bottom:1.2em; }
        .article-content .content-body h2 { font-size:1.6rem; font-weight:700; margin-top:1.8em; margin-bottom:0.6em; color:var(--text-primary); }
        .article-content .content-body h3 { font-size:1.25rem; font-weight:600; margin-top:1.4em; margin-bottom:0.4em; }
        .article-content .content-body ul, .article-content .content-body ol { margin-bottom:1.2em; padding-left:1.6em; }
        .article-content .content-body li { margin-bottom:0.3em; }
        .article-content .content-body a { color:var(--primary); border-bottom:1px solid transparent; }
        .article-content .content-body a:hover { border-bottom-color:var(--primary); }
        .article-content .content-body blockquote { border-left:4px solid var(--primary); background:var(--primary-light); padding:18px 24px; border-radius:0 var(--radius-sm) var(--radius-sm) 0; margin:1.2em 0; color:var(--text-secondary); }
        .article-content .content-body img { border-radius:var(--radius-md); margin:1.6em 0; box-shadow:var(--shadow-sm); }
        .article-content .content-body pre { background:var(--bg-dark); color:#e8e8f0; padding:20px 24px; border-radius:var(--radius-md); overflow-x:auto; margin:1.2em 0; font-size:0.9rem; }
        .article-content .content-body code { font-family:'Fira Code','Consolas',monospace; font-size:0.9em; }
        .article-content .content-body table { width:100%; border-collapse:collapse; margin:1.2em 0; }
        .article-content .content-body th, .article-content .content-body td { border:1px solid var(--border-light); padding:12px 16px; text-align:left; }
        .article-content .content-body th { background:var(--bg-section); font-weight:600; }
        .article-not-found { text-align:center; padding:80px 20px; }
        .article-not-found i { font-size:3.5rem; color:var(--primary); margin-bottom:20px; }
        .article-not-found h2 { font-size:1.8rem; font-weight:700; margin-bottom:12px; }
        .article-not-found p { color:var(--text-muted); margin-bottom:28px; font-size:1.05rem; }
        .article-not-found a { display:inline-flex; align-items:center; gap:8px; }
        /* related section */
        .related-section { padding:60px 0; background:#ffffff; }
        .related-section h2 { font-size:1.8rem; font-weight:700; text-align:center; margin-bottom:40px; }
        .related-grid { display:grid; grid-template-columns:repeat(auto-fill, minmax(280px,1fr)); gap:24px; }
        .related-card { background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius-md); overflow:hidden; transition:var(--transition); box-shadow:var(--shadow-sm); }
        .related-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:transparent; }
        .related-card .card-img { height:180px; background:var(--bg-dark); position:relative; overflow:hidden; }
        .related-card .card-img img { width:100%; height:100%; object-fit:cover; transition:var(--transition); }
        .related-card:hover .card-img img { transform:scale(1.05); }
        .related-card .card-body { padding:20px 22px; }
        .related-card .card-body h3 { font-size:1.1rem; font-weight:600; margin-bottom:8px; }
        .related-card .card-body h3 a { color:var(--text-primary); }
        .related-card .card-body h3 a:hover { color:var(--primary); }
        .related-card .card-body p { color:var(--text-muted); font-size:0.9rem; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
        .related-card .card-meta { display:flex; justify-content:space-between; align-items:center; margin-top:12px; font-size:0.8rem; color:var(--text-muted); }
        /* FAQ section */
        .faq-section { padding:60px 0; background:var(--bg-section); }
        .faq-section h2 { font-size:1.8rem; font-weight:700; text-align:center; margin-bottom:40px; }
        .faq-grid { max-width:800px; margin:0 auto; display:flex; flex-direction:column; gap:16px; }
        .faq-item { background:var(--bg-card); border:1px solid var(--border-light); border-radius:var(--radius-md); padding:0; overflow:hidden; transition:var(--transition); box-shadow:var(--shadow-sm); }
        .faq-item summary { padding:18px 24px; font-weight:600; font-size:1rem; cursor:pointer; display:flex; align-items:center; gap:12px; list-style:none; transition:var(--transition); }
        .faq-item summary::-webkit-details-marker { display:none; }
        .faq-item summary i { color:var(--primary); font-size:1.1rem; transition:var(--transition); }
        .faq-item[open] summary i { transform:rotate(45deg); }
        .faq-item .faq-answer { padding:0 24px 20px; color:var(--text-secondary); font-size:0.95rem; line-height:1.7; }
        .faq-item:hover { border-color:var(--primary); box-shadow:var(--shadow-md); }
        /* CTA */
        .cta-section { padding:60px 0; background:var(--bg-dark); position:relative; overflow:hidden; }
        .cta-section::before { content:''; position:absolute; inset:0; background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat; opacity:0.1; }
        .cta-section .container { position:relative; z-index:2; text-align:center; }
        .cta-section h2 { font-size:2rem; font-weight:800; color:#ffffff; margin-bottom:16px; }
        .cta-section p { color:rgba(255,255,255,0.7); max-width:600px; margin:0 auto 32px; font-size:1.05rem; }
        .cta-section .btn-primary { font-size:1rem; padding:14px 36px; }
        /* footer */
        .site-footer { background:var(--bg-dark); color:rgba(255,255,255,0.7); padding:56px 0 0; border-top:1px solid rgba(255,255,255,0.06); }
        .footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr; gap:40px; padding-bottom:40px; border-bottom:1px solid rgba(255,255,255,0.06); }
        .footer-brand .logo { font-size:1.3rem; margin-bottom:14px; }
        .footer-brand p { font-size:0.9rem; line-height:1.7; color:rgba(255,255,255,0.5); max-width:380px; }
        .footer-col h4 { color:#ffffff; 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 { color:rgba(255,255,255,0.5); font-size:0.9rem; transition:var(--transition); }
        .footer-col ul li a:hover { color:var(--primary); }
        .footer-bottom { padding:20px 0; text-align:center; font-size:0.85rem; color:rgba(255,255,255,0.35); }
        /* responsive */
        @media (max-width:1024px) {
            .nav-links { gap:24px; }
            .search-box { min-width:140px; }
        }
        @media (max-width:768px) {
            .nav-links { display:none; }
            .search-box { display:none; }
            .mobile-toggle { display:block; }
            .nav-right .btn-primary { display:none; }
            .article-hero h1 { font-size:1.8rem; }
            .article-content { padding:28px 20px; }
            .article-content .content-body { font-size:1rem; }
            .footer-grid { grid-template-columns:1fr; gap:28px; }
            .related-grid { grid-template-columns:1fr; }
            .cta-section h2 { font-size:1.5rem; }
        }
        @media (max-width:520px) {
            .container { padding:0 16px; }
            .article-hero { padding:50px 0 40px; }
            .article-hero h1 { font-size:1.4rem; }
            .article-main { padding:40px 0; }
            .article-content { padding:20px 16px; border-radius:var(--radius-md); }
            .faq-item summary { padding:14px 16px; font-size:0.95rem; }
            .faq-item .faq-answer { padding:0 16px 16px; }
            .cta-section h2 { font-size:1.3rem; }
            .logo { font-size:1.1rem; }
        }
        /* tailwind supplement */
        .bg-dark-custom { background:var(--bg-dark); }
        .text-primary-custom { color:var(--primary); }
        .border-primary-custom { border-color:var(--primary); }

/* roulang page: category1 */
:root {
            --primary: #D4A843;
            --primary-light: #E8C56A;
            --primary-dark: #B8912E;
            --navy: #0F1A2E;
            --deep: #1E3A5F;
            --accent: #F97316;
            --muted: #64748B;
            --light-bg: #F8FAFC;
            --card-bg: #FFFFFF;
            --border-light: #E2E8F0;
            --shadow-sm: 0 1px 3px rgba(15,26,46,0.06);
            --shadow-md: 0 8px 24px rgba(15,26,46,0.08);
            --shadow-lg: 0 20px 48px rgba(15,26,46,0.12);
            --radius-lg: 0.875rem;
            --radius-xl: 1.125rem;
            --radius-2xl: 1.5rem;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: var(--light-bg);
            color: #1E293B;
            line-height: 1.6;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
            border: none;
            outline: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* header */
        .site-header {
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0.75rem 0;
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            flex-wrap: nowrap;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--navy);
            letter-spacing: -0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.1rem;
        }
        .logo span {
            color: var(--primary);
            font-weight: 800;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
            flex-shrink: 0;
        }
        .nav-links li a {
            font-size: 0.95rem;
            font-weight: 500;
            color: #475569;
            padding: 0.4rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-links li a:hover {
            color: var(--navy);
        }
        .nav-links li a:hover::after {
            width: 100%;
        }
        .nav-links li a.active {
            color: var(--navy);
            font-weight: 600;
        }
        .nav-links li a.active::after {
            width: 100%;
            background: var(--primary);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: #F1F5F9;
            border-radius: 2rem;
            padding: 0.4rem 1rem 0.4rem 1.2rem;
            gap: 0.5rem;
            border: 1px solid transparent;
            transition: var(--transition);
            min-width: 180px;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            background: #FFFFFF;
            box-shadow: 0 0 0 4px rgba(212, 168, 67, 0.12);
        }
        .search-box i {
            color: var(--muted);
            font-size: 0.85rem;
        }
        .search-box input {
            background: transparent;
            font-size: 0.9rem;
            color: #1E293B;
            width: 100%;
            padding: 0.2rem 0;
        }
        .search-box input::placeholder {
            color: #94A3B8;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.6rem 1.5rem;
            border-radius: 2rem;
            transition: var(--transition);
            white-space: nowrap;
            border: none;
            background: var(--navy);
            color: #fff;
        }
        .btn-primary i {
            font-size: 0.85rem;
        }
        .btn-primary:hover {
            background: #1A2A44;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--navy);
        }
        .btn-accent:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: var(--navy);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--navy);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-gold {
            background: var(--primary);
            color: var(--navy);
        }
        .btn-gold:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--navy);
            padding: 0.4rem;
            border-radius: 0.5rem;
            background: #F1F5F9;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: #E2E8F0;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: fixed;
                top: 64px;
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                gap: 0.5rem;
                padding: 1.5rem 1.5rem 2rem;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border-light);
                z-index: 99;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                font-size: 1.1rem;
                padding: 0.6rem 0;
                width: 100%;
                border-bottom: 1px solid rgba(226, 232, 240, 0.4);
            }
            .nav-links li a::after {
                display: none;
            }
            .nav-links li a.active {
                color: var(--primary);
            }
            .search-box {
                min-width: 120px;
                flex-shrink: 1;
            }
            .mobile-toggle {
                display: inline-flex;
            }
            .btn-primary span {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .logo {
                font-size: 1.05rem;
                letter-spacing: -0.01em;
            }
            .search-box {
                min-width: 80px;
                padding: 0.3rem 0.6rem 0.3rem 0.8rem;
            }
            .search-box input {
                font-size: 0.8rem;
                width: 60px;
            }
            .btn-primary {
                padding: 0.5rem 1rem;
                font-size: 0.8rem;
            }
            .btn-primary i {
                font-size: 0.75rem;
            }
        }

        /* hero */
        .hero-section {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 6rem 1.5rem 4rem;
            background: linear-gradient(135deg, rgba(15, 26, 46, 0.92) 0%, rgba(30, 58, 95, 0.85) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212, 168, 67, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, #fff 60%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content .subtitle {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 2rem;
            line-height: 1.7;
            font-weight: 400;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            align-items: center;
        }
        .hero-actions .btn-primary {
            padding: 0.85rem 2.4rem;
            font-size: 1.05rem;
            border-radius: 2rem;
        }
        .hero-actions .btn-outline {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            padding: 0.85rem 2.4rem;
            font-size: 1.05rem;
            border-radius: 2rem;
        }
        .hero-actions .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(212, 168, 67, 0.2);
            border: 1px solid rgba(212, 168, 67, 0.3);
            padding: 0.4rem 1.2rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            color: var(--primary-light);
            margin-bottom: 1.5rem;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: 60vh;
                padding: 5rem 1rem 3rem;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .hero-content .subtitle {
                font-size: 1rem;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                padding: 0.7rem 1.6rem;
                font-size: 0.9rem;
            }
        }
        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.7rem;
            }
            .hero-content .subtitle {
                font-size: 0.9rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 0.3rem 1rem;
            }
        }

        /* section common */
        .section-pad {
            padding: 5rem 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--navy);
            text-align: center;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--muted);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 3rem;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-pad {
                padding: 3.5rem 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.4rem;
            }
            .section-sub {
                font-size: 0.85rem;
            }
        }

        /* intro */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .intro-img {
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
            object-fit: cover;
            width: 100%;
            background: #E2E8F0;
        }
        .intro-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--navy);
            margin-bottom: 1rem;
        }
        .intro-text p {
            color: #475569;
            line-height: 1.8;
            margin-bottom: 1.2rem;
            font-size: 1rem;
        }
        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 1.5rem;
        }
        .intro-tags .tag {
            background: rgba(212, 168, 67, 0.12);
            color: var(--deep);
            padding: 0.35rem 1rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(212, 168, 67, 0.2);
        }
        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .intro-img {
                aspect-ratio: 16 / 9;
            }
            .intro-text h3 {
                font-size: 1.3rem;
            }
        }

        /* steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }
        .step-card {
            background: var(--card-bg);
            border-radius: var(--radius-xl);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 168, 67, 0.3);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: var(--navy);
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            box-shadow: 0 4px 12px rgba(212, 168, 67, 0.3);
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--navy);
            margin-bottom: 0.5rem;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.6;
        }
        .step-card .step-icon {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 0.8rem;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .step-card {
                padding: 1.5rem 1rem;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* advantages */
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .adv-card {
            background: var(--card-bg);
            border-radius: var(--radius-xl);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-align: center;
        }
        .adv-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 168, 67, 0.25);
        }
        .adv-card .adv-icon {
            width: 60px;
            height: 60px;
            background: rgba(212, 168, 67, 0.1);
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin: 0 auto 1.2rem;
            transition: var(--transition);
        }
        .adv-card:hover .adv-icon {
            background: var(--primary);
            color: var(--navy);
        }
        .adv-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--navy);
            margin-bottom: 0.5rem;
        }
        .adv-card p {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.7;
        }
        @media (max-width: 1024px) {
            .adv-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .adv-grid {
                grid-template-columns: 1fr;
            }
            .adv-card {
                padding: 1.5rem 1rem;
            }
        }

        /* scenarios */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .scenario-card {
            position: relative;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: #1E293B;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            cursor: pointer;
        }
        .scenario-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .scenario-card:hover img {
            transform: scale(1.05);
        }
        .scenario-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 26, 46, 0.85) 0%, rgba(15, 26, 46, 0.1) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 1.5rem;
            color: #fff;
        }
        .scenario-overlay h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0.3rem;
        }
        .scenario-overlay p {
            font-size: 0.9rem;
            opacity: 0.85;
            line-height: 1.5;
        }
        @media (max-width: 768px) {
            .scenario-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .scenario-card {
                aspect-ratio: 16 / 9;
            }
        }

        /* faq */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 67, 0.3);
            box-shadow: var(--shadow-sm);
        }
        .faq-q {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--navy);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 1rem;
            user-select: none;
            transition: var(--transition);
        }
        .faq-q i {
            color: var(--primary);
            transition: var(--transition);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .faq-q.open i {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            padding: 0 1.5rem;
            color: #475569;
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-a.open {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }
        @media (max-width: 520px) {
            .faq-q {
                padding: 1rem 1.2rem;
                font-size: 0.9rem;
            }
            .faq-a {
                font-size: 0.85rem;
            }
            .faq-a.open {
                padding: 0 1.2rem 1rem;
            }
        }

        /* cta */
        .cta-section {
            background: linear-gradient(135deg, var(--navy) 0%, var(--deep) 100%);
            padding: 4.5rem 1.5rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 50%, rgba(212, 168, 67, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 2rem;
            line-height: 1.7;
        }
        .cta-content .btn-primary {
            padding: 0.9rem 2.8rem;
            font-size: 1.1rem;
            border-radius: 2rem;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 3rem 1rem;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .cta-content p {
                font-size: 0.95rem;
            }
            .cta-content .btn-primary {
                padding: 0.75rem 2rem;
                font-size: 0.95rem;
            }
        }

        /* footer */
        .site-footer {
            background: #0B1322;
            color: rgba(255, 255, 255, 0.7);
            padding: 4rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 3rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 1rem;
        }
        .footer-brand .logo span {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 380px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            letter-spacing: 0.02em;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .site-footer {
                padding: 2.5rem 0 0;
            }
        }

        /* scroll top */
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--navy);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 50;
            border: none;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .scroll-top:hover {
            background: var(--primary);
            color: var(--navy);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        @media (max-width: 520px) {
            .scroll-top {
                bottom: 1.2rem;
                right: 1.2rem;
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        /* breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: var(--muted);
            padding: 1.2rem 0 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--muted);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--navy);
            font-weight: 500;
        }
        .breadcrumb i {
            font-size: 0.65rem;
            color: #94A3B8;
        }