/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f2a4a;
            --primary-light: #1a3e66;
            --primary-dark: #0a1e33;
            --accent: #2a8c7a;
            --accent-light: #3ab8a2;
            --accent-dark: #1e6b5d;
            --gold: #d4a853;
            --gold-light: #e8c97a;
            --gold-dark: #b8923e;
            --bg-light: #f5f7fa;
            --bg-white: #ffffff;
            --bg-dark: #0d1a2b;
            --text-primary: #1a2332;
            --text-secondary: #4a5568;
            --text-light: #8899aa;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --border-light: #edf2f7;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (max-width: 640px) { .container { padding: 0 16px; } }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg-light); }
        ::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 10px; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(15, 42, 74, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            box-shadow: 0 2px 30px rgba(0,0,0,0.2);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 30, 51, 0.98);
            box-shadow: 0 4px 40px rgba(0,0,0,0.3);
        }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: 70px; max-width: 1200px; margin: 0 auto; padding: 0 24px;
        }
        .logo-wrap {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.35rem; font-weight: 700; color: #fff;
            letter-spacing: 0.5px;
        }
        .logo-wrap .logo-icon {
            width: 36px; height: 36px;
            background: linear-gradient(135deg, var(--gold), var(--gold-light));
            border-radius: 10px;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.1rem; color: var(--primary-dark);
            box-shadow: 0 4px 12px rgba(212,168,83,0.3);
        }
        .logo-wrap .logo-text { 
            background: linear-gradient(90deg, #fff, #d4dce8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex; align-items: center; gap: 6px;
        }
        .nav-list a {
            display: flex; align-items: center; gap: 6px;
            padding: 8px 18px; border-radius: 40px;
            font-size: 0.9rem; font-weight: 500;
            color: rgba(255,255,255,0.7);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-list a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-list a.active {
            color: #fff; background: rgba(212,168,83,0.18);
            box-shadow: inset 0 0 0 1px rgba(212,168,83,0.25);
        }
        .nav-list a i { font-size: 0.85rem; opacity: 0.7; }
        .nav-right {
            display: flex; align-items: center; gap: 12px;
        }
        .nav-search {
            display: flex; align-items: center;
            background: rgba(255,255,255,0.08);
            border-radius: 40px; padding: 0 16px;
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .nav-search:focus-within { background: rgba(255,255,255,0.14); border-color: var(--gold); }
        .nav-search input {
            background: transparent; border: none; outline: none;
            color: #fff; font-size: 0.85rem; padding: 8px 0; width: 130px;
        }
        .nav-search input::placeholder { color: rgba(255,255,255,0.4); }
        .nav-search button { color: rgba(255,255,255,0.5); padding: 8px 4px; font-size: 0.9rem; }
        .nav-search button:hover { color: var(--gold); }
        .btn-header {
            padding: 8px 24px; border-radius: 40px;
            font-size: 0.85rem; font-weight: 600;
            background: linear-gradient(135deg, var(--gold), var(--gold-dark));
            color: var(--primary-dark);
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(212,168,83,0.25);
            white-space: nowrap;
        }
        .btn-header:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212,168,83,0.35);
        }
        .mobile-toggle {
            display: none; color: #fff; font-size: 1.5rem;
            padding: 4px 8px; cursor: pointer;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative; min-height: 92vh;
            display: flex; align-items: center;
            background: var(--primary-dark);
            overflow: hidden;
            padding-top: 70px;
        }
        .hero-bg {
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom { 0% { transform: scale(1.05); } 100% { transform: scale(1.15); } }
        .hero-overlay {
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(10,30,51,0.88) 0%, rgba(15,42,74,0.72) 50%, rgba(10,30,51,0.88) 100%);
        }
        .hero-content {
            position: relative; z-index: 2; width: 100%;
            padding: 80px 0 100px;
        }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(212,168,83,0.15);
            border: 1px solid rgba(212,168,83,0.2);
            border-radius: 40px; padding: 6px 20px 6px 16px;
            font-size: 0.82rem; color: var(--gold-light);
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i { font-size: 0.75rem; }
        .hero-title {
            font-size: clamp(2.6rem, 6.5vw, 4.8rem);
            font-weight: 800; line-height: 1.12;
            color: #fff; letter-spacing: -0.02em;
            max-width: 800px;
            text-shadow: 0 2px 30px rgba(0,0,0,0.2);
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--gold), var(--gold-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-sub {
            font-size: clamp(1rem, 1.8vw, 1.2rem);
            color: rgba(255,255,255,0.7);
            max-width: 600px; margin-top: 20px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex; flex-wrap: wrap; gap: 16px; margin-top: 36px;
        }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 36px; border-radius: 50px;
            font-size: 1rem; font-weight: 600;
            background: linear-gradient(135deg, var(--gold), var(--gold-dark));
            color: var(--primary-dark);
            box-shadow: 0 8px 32px rgba(212,168,83,0.3);
            transition: var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 44px rgba(212,168,83,0.4);
        }
        .btn-secondary {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 36px; border-radius: 50px;
            font-size: 1rem; font-weight: 600;
            background: rgba(255,255,255,0.06);
            color: #fff;
            border: 1px solid rgba(255,255,255,0.15);
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background: rgba(255,255,255,0.14);
            border-color: rgba(255,255,255,0.3);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex; flex-wrap: wrap; gap: 40px; margin-top: 56px;
            padding-top: 36px; border-top: 1px solid rgba(255,255,255,0.06);
        }
        .hero-stat-item { text-align: left; }
        .hero-stat-item .num {
            font-size: 2rem; font-weight: 800; color: #fff;
            line-height: 1.2;
        }
        .hero-stat-item .num .gold { color: var(--gold-light); }
        .hero-stat-item .label {
            font-size: 0.82rem; color: rgba(255,255,255,0.5);
            margin-top: 4px;
        }

        /* ===== Section Common ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-white); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-sm { padding: 50px 0; }
        .section-title-wrap { text-align: center; margin-bottom: 52px; }
        .section-tag {
            display: inline-flex; align-items: center; gap: 6px;
            font-size: 0.8rem; font-weight: 600; text-transform: uppercase;
            letter-spacing: 2px; color: var(--accent);
            background: rgba(42,140,122,0.08);
            padding: 6px 18px; border-radius: 40px;
            margin-bottom: 14px;
        }
        .section-title {
            font-size: clamp(1.8rem, 3.2vw, 2.6rem);
            font-weight: 700; line-height: 1.25;
            color: var(--text-primary);
        }
        .section-dark .section-title { color: #fff; }
        .section-title .highlight { color: var(--accent); }
        .section-desc {
            font-size: 1.05rem; color: var(--text-secondary);
            max-width: 600px; margin: 12px auto 0;
            line-height: 1.7;
        }
        .section-dark .section-desc { color: rgba(255,255,255,0.6); }

        /* ===== Cards ===== */
        .card-grid {
            display: grid; gap: 28px;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        }
        .card-grid-2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
        .card-grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }
        .card-dark {
            background: rgba(255,255,255,0.04);
            border-color: rgba(255,255,255,0.06);
            backdrop-filter: blur(8px);
        }
        .card-dark:hover { background: rgba(255,255,255,0.08); }
        .card-img-wrap {
            position: relative; overflow: hidden; aspect-ratio: 16 / 9;
            background: var(--bg-light);
        }
        .card-img-wrap img {
            width: 100%; height: 100%; object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-img-wrap img { transform: scale(1.06); }
        .card-body { padding: 24px; }
        .card-body-sm { padding: 18px; }
        .card-tag {
            display: inline-block;
            font-size: 0.72rem; font-weight: 600; letter-spacing: 0.5px;
            padding: 4px 14px; border-radius: 40px;
            background: rgba(42,140,122,0.08);
            color: var(--accent);
            margin-bottom: 10px;
        }
        .card-title {
            font-size: 1.15rem; font-weight: 700; line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 8px;
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .card-text {
            font-size: 0.92rem; color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
        }
        .card-meta {
            display: flex; align-items: center; gap: 16px;
            font-size: 0.8rem; color: var(--text-light);
            margin-top: 14px; padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .card-meta i { margin-right: 4px; }

        /* ===== Feature / Icon Cards ===== */
        .feature-card {
            text-align: center; padding: 32px 20px;
            border-radius: var(--radius-md);
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }
        .feature-card .icon-wrap {
            width: 72px; height: 72px; margin: 0 auto 18px;
            border-radius: 20px;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.8rem; color: #fff;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            box-shadow: 0 8px 24px rgba(42,140,122,0.25);
        }
        .feature-card .icon-wrap.gold-bg {
            background: linear-gradient(135deg, var(--gold), var(--gold-dark));
            box-shadow: 0 8px 24px rgba(212,168,83,0.3);
        }
        .feature-card .icon-wrap.blue-bg {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
        .feature-card p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }

        /* ===== Data / KPI ===== */
        .kpi-grid {
            display: grid; gap: 24px;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        }
        .kpi-card {
            text-align: center; padding: 32px 20px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.06);
            backdrop-filter: blur(6px);
            transition: var(--transition);
        }
        .kpi-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
        .kpi-card .kpi-num {
            font-size: 2.6rem; font-weight: 800;
            background: linear-gradient(135deg, var(--gold), var(--gold-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .kpi-card .kpi-label {
            font-size: 0.9rem; color: rgba(255,255,255,0.6);
            margin-top: 8px;
        }
        .kpi-card .kpi-icon { font-size: 1.6rem; margin-bottom: 12px; color: var(--gold-light); opacity: 0.6; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 18px 24px; font-size: 1rem; font-weight: 600;
            color: var(--text-primary); cursor: pointer;
            gap: 12px; user-select: none;
        }
        .faq-question i { color: var(--accent); font-size: 0.85rem; transition: var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0; overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            font-size: 0.92rem; color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px; padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
        }
        .cta-wrap {
            position: relative; z-index: 1;
            text-align: center; padding: 60px 0;
        }
        .cta-wrap h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 700; color: #fff;
            max-width: 700px; margin: 0 auto;
        }
        .cta-wrap p {
            color: rgba(255,255,255,0.7); font-size: 1.05rem;
            max-width: 520px; margin: 14px auto 32px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-grid {
            display: grid; gap: 40px;
            grid-template-columns: 2fr 1fr 1fr 1fr;
        }
        .footer-brand .logo-wrap { margin-bottom: 14px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.8; max-width: 320px; }
        .footer-col h4 {
            font-size: 0.95rem; font-weight: 700; color: #fff;
            margin-bottom: 18px; letter-spacing: 0.5px;
        }
        .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-col ul a {
            font-size: 0.88rem; color: rgba(255,255,255,0.55);
            transition: var(--transition); display: flex; align-items: center; gap: 6px;
        }
        .footer-col ul a:hover { color: var(--gold-light); transform: translateX(4px); }
        .footer-bottom {
            margin-top: 40px; padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex; justify-content: space-between; align-items: center;
            flex-wrap: wrap; gap: 12px;
            font-size: 0.82rem; color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--gold-light); }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex; align-items: center; gap: 8px;
            font-size: 0.85rem; color: var(--text-light);
            padding: 18px 0;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: var(--border); }

        /* ===== News List (CMS) ===== */
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-item {
            display: flex; align-items: flex-start; gap: 18px;
            padding: 18px 22px;
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
            border-color: var(--accent);
        }
        .news-item .news-date {
            font-size: 0.78rem; color: var(--text-light);
            white-space: nowrap; min-width: 60px;
            padding-top: 2px;
        }
        .news-item .news-cat {
            font-size: 0.72rem; font-weight: 600;
            padding: 2px 12px; border-radius: 40px;
            background: rgba(42,140,122,0.08);
            color: var(--accent);
            white-space: nowrap;
        }
        .news-item .news-title {
            flex: 1; font-size: 0.95rem; font-weight: 600;
            color: var(--text-primary);
            display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
        }
        .news-item .news-title:hover { color: var(--accent); }
        .news-empty {
            text-align: center; padding: 40px 20px;
            font-size: 1rem; color: var(--text-light);
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px dashed var(--border);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .nav-search input { width: 100px; }
        }
        @media (max-width: 800px) {
            .nav-list { display: none; }
            .mobile-toggle { display: block; }
            .nav-list.mobile-open {
                display: flex; flex-direction: column;
                position: absolute; top: 70px; left: 0; right: 0;
                background: rgba(10,30,51,0.98);
                backdrop-filter: blur(20px);
                padding: 16px 24px 24px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
                box-shadow: 0 20px 60px rgba(0,0,0,0.4);
                gap: 4px;
            }
            .nav-list.mobile-open a {
                padding: 12px 16px; border-radius: 10px;
                font-size: 1rem;
            }
            .nav-right .nav-search { display: none; }
            .hero-stats { gap: 24px; }
            .hero-stat-item .num { font-size: 1.6rem; }
            .card-grid-2 { grid-template-columns: 1fr; }
        }
        @media (max-width: 640px) {
            .header-inner { padding: 0 16px; }
            .hero-section { min-height: 80vh; }
            .hero-content { padding: 60px 0 70px; }
            .hero-title { font-size: 2rem; }
            .hero-actions { flex-direction: column; }
            .btn-primary, .btn-secondary { justify-content: center; width: 100%; }
            .hero-stats { flex-direction: column; gap: 16px; padding-top: 24px; margin-top: 36px; }
            .section { padding: 50px 0; }
            .section-title-wrap { margin-bottom: 34px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .card-grid { grid-template-columns: 1fr; }
            .kpi-grid { grid-template-columns: 1fr 1fr; }
            .news-item { flex-wrap: wrap; gap: 10px; }
            .news-item .news-date { min-width: auto; }
            .faq-question { padding: 14px 16px; font-size: 0.95rem; }
            .faq-answer { padding: 0 16px; }
            .faq-item.open .faq-answer { padding: 0 16px 16px; }
        }
        @media (max-width: 400px) {
            .kpi-grid { grid-template-columns: 1fr; }
            .logo-wrap { font-size: 1.1rem; }
            .logo-wrap .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
        }

        /* ===== Utility ===== */
        .text-accent { color: var(--accent); }
        .text-gold { color: var(--gold); }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 12px; }
        .gap-4 { gap: 16px; }
        .mt-2 { margin-top: 8px; }
        .mt-4 { margin-top: 16px; }
        .mt-6 { margin-top: 24px; }
        .mt-8 { margin-top: 32px; }
        .mb-4 { margin-bottom: 16px; }
        .mb-6 { margin-bottom: 24px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .text-center { text-align: center; }
        .rounded-full { border-radius: 9999px; }

/* roulang page: article */
:root {
            --primary: #1a56db;
            --primary-dark: #1341b0;
            --primary-light: #e8edf9;
            --secondary: #0e9f6e;
            --secondary-dark: #0a7d56;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-weak: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px 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);
            --max-width: 1200px;
            --header-bg: rgba(255,255,255,0.96);
            --footer-bg: #0f172a;
            --footer-text: #cbd5e1;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        @media (max-width:640px) { .container { padding: 0 16px; } }

        /* Header */
        .site-header {
            background: var(--header-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 6px rgba(0,0,0,0.04);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 20px;
        }
        @media (max-width:640px) { .header-inner { padding: 0 16px; height: 62px; } }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(26,86,219,0.3);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.3px;
        }
        @media (max-width:640px) { .logo-text { font-size: 17px; } }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-list::-webkit-scrollbar { display: none; }
        .nav-list a {
            padding: 8px 16px;
            border-radius: 100px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text);
            white-space: nowrap;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a i { font-size: 14px; color: var(--text-weak); transition: var(--transition); }
        .nav-list a:hover { background: var(--primary-light); color: var(--primary); }
        .nav-list a:hover i { color: var(--primary); }
        .nav-list a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(26,86,219,0.35); }
        .nav-list a.active i { color: #fff; }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 0 6px 0 16px;
            transition: var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,0.12); }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 0;
            font-size: 14px;
            color: var(--text);
            outline: none;
            width: 120px;
            transition: var(--transition);
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-search button {
            background: transparent;
            border: none;
            padding: 8px 12px;
            color: var(--text-weak);
            cursor: pointer;
            border-radius: 50%;
            transition: var(--transition);
        }
        .nav-search button:hover { color: var(--primary); }
        .btn-header {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 9px 22px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 14px rgba(26,86,219,0.3);
            border: none;
            cursor: pointer;
        }
        .btn-header:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,86,219,0.4); color: #fff; }
        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 18px;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
        }
        .mobile-toggle:hover { background: var(--primary-light); color: var(--primary); }
        @media (max-width:768px) {
            .nav-list { display: none; }
            .nav-search { display: none; }
            .btn-header { display: none; }
            .mobile-toggle { display: flex; align-items: center; justify-content: center; }
        }
        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 12px 20px 20px;
            box-shadow: 0 12px 32px rgba(0,0,0,0.08);
            border-radius: 0 0 var(--radius) var(--radius);
        }
        .mobile-menu.open { display: block; }
        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
        }
        .mobile-menu a i { width: 20px; color: var(--text-weak); }
        .mobile-menu a:hover { background: var(--primary-light); color: var(--primary); }
        .mobile-menu a.active { background: var(--primary); color: #fff; }
        .mobile-menu a.active i { color: #fff; }

        /* Article Hero */
        .article-hero {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-hero .breadcrumb a:hover { color: #fff; }
        .article-hero .breadcrumb span { color: rgba(255,255,255,0.5); }
        .article-hero h1 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            max-width: 800px;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        @media (max-width:640px) { .article-hero h1 { font-size: 24px; } }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.75);
            font-size: 14px;
        }
        .article-meta i { margin-right: 4px; }
        .article-meta .badge {
            background: rgba(255,255,255,0.15);
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 12px;
            color: #fff;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.1);
        }

        /* Article Body */
        .article-body-wrap {
            padding: 50px 0 60px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        @media (max-width:992px) {
            .article-layout { grid-template-columns: 1fr; }
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 44px;
            border: 1px solid var(--border);
        }
        @media (max-width:640px) { .article-main { padding: 24px 20px; } }
        .article-content {
            font-size: 16.5px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content h2 { font-size: 24px; font-weight: 700; margin: 36px 0 16px; color: #0f172a; }
        .article-content h3 { font-size: 20px; font-weight: 600; margin: 28px 0 12px; color: #1e293b; }
        .article-content p { margin-bottom: 18px; }
        .article-content ul, .article-content ol { margin: 16px 0 20px; padding-left: 24px; }
        .article-content li { margin-bottom: 8px; }
        .article-content img { border-radius: var(--radius-sm); margin: 24px 0; box-shadow: var(--shadow); }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 22px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text);
            font-style: normal;
        }
        .article-content a { color: var(--primary); font-weight: 500; border-bottom: 1px solid transparent; }
        .article-content a:hover { border-bottom-color: var(--primary); }
        .article-content .highlight-box {
            background: linear-gradient(135deg, var(--primary-light), #f0f4ff);
            border: 1px solid rgba(26,86,219,0.2);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            margin: 24px 0;
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            padding: 26px 24px;
        }
        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .sidebar-card h3 i { color: var(--primary); font-size: 16px; }
        .sidebar-list { list-style: none; padding: 0; }
        .sidebar-list li { margin-bottom: 2px; }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text);
            transition: var(--transition);
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { background: var(--primary-light); color: var(--primary); padding-left: 18px; }
        .sidebar-list a i { color: var(--text-light); font-size: 12px; transition: var(--transition); }
        .sidebar-list a:hover i { color: var(--primary); }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), #0f3b8a);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            color: #fff;
        }
        .sidebar-cta h4 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
        .sidebar-cta p { font-size: 14px; opacity: 0.85; margin-bottom: 18px; }
        .sidebar-cta .btn-cta {
            background: #fff;
            color: var(--primary);
            padding: 10px 28px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .sidebar-cta .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); color: var(--primary-dark); }

        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: var(--footer-text);
            padding: 56px 0 30px;
        }
        .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        @media (max-width:768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; } }
        @media (max-width:480px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }
        .footer-brand .logo-wrap { margin-bottom: 14px; }
        .footer-brand .logo-text { background: linear-gradient(135deg, #93c5fd, #6ee7b7); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: #94a3b8; max-width: 360px; }
        .footer-col h4 { font-size: 15px; font-weight: 600; color: #f1f5f9; margin-bottom: 16px; letter-spacing: 0.3px; }
        .footer-col ul { list-style: none; padding: 0; }
        .footer-col li { margin-bottom: 10px; font-size: 14px; display: flex; align-items: center; gap: 8px; }
        .footer-col a { color: #94a3b8; transition: var(--transition); }
        .footer-col a:hover { color: #fff; padding-left: 2px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            font-size: 13px;
            color: #64748b;
        }
        .footer-bottom a { color: #94a3b8; }
        .footer-bottom a:hover { color: #fff; }
        @media (max-width:480px) { .footer-bottom { flex-direction: column; text-align: center; } }

        /* Not Found */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i { font-size: 64px; color: var(--text-light); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 26px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
        .not-found-box p { color: var(--text-weak); font-size: 16px; margin-bottom: 24px; }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: 100px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); color: #fff; }

        /* Tag label */
        .tag { display: inline-block; padding: 2px 12px; border-radius: 100px; font-size: 12px; font-weight: 500; background: var(--primary-light); color: var(--primary); }

        /* Responsive */
        @media (max-width:768px) {
            .article-hero { padding: 36px 0 30px; }
            .article-main { padding: 24px 18px; }
            .article-content { font-size: 15.5px; }
        }
        @media (max-width:480px) {
            .article-hero h1 { font-size: 22px; }
            .article-meta { font-size: 13px; gap: 12px; }
        }

/* roulang page: category1 */
:root {
            --primary: #1a5cff;
            --primary-light: #e8eeff;
            --primary-dark: #0d3ea8;
            --secondary: #00b894;
            --secondary-light: #e0f7f0;
            --accent: #ff6b35;
            --bg: #f8faff;
            --bg-card: #ffffff;
            --text: #1a2332;
            --text-soft: #4a5568;
            --text-muted: #8896ab;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(26, 92, 255, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 92, 255, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            background: var(--bg);
            color: var(--text);
            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,
        input {
            font: inherit;
            outline: none;
            border: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0 24px;
            transition: var(--transition);
        }
        .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(26, 92, 255, 0.25);
        }
        .logo-text {
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-soft);
            display: flex;
            align-items: center;
            gap: 7px;
            transition: var(--transition);
            position: relative;
        }
        .nav-list a i {
            font-size: 0.85rem;
            opacity: 0.7;
        }
        .nav-list a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-list a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 92, 255, 0.25);
        }
        .nav-list a.active i {
            opacity: 1;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: #f1f4fa;
            border-radius: 8px;
            padding: 0 12px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.1);
        }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 8px 6px;
            font-size: 0.9rem;
            color: var(--text);
            width: 130px;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search button {
            background: transparent;
            color: var(--text-muted);
            cursor: pointer;
            padding: 6px 4px;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .nav-search button:hover {
            color: var(--primary);
        }
        .btn-header {
            padding: 9px 22px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 16px rgba(26, 92, 255, 0.2);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-header:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(26, 92, 255, 0.3);
            color: #fff;
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        @media (max-width: 1024px) {
            .nav-search input {
                width: 90px;
            }
            .nav-list a {
                padding: 6px 12px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 820px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border);
                flex-direction: column;
                padding: 12px 16px;
                gap: 6px;
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                padding: 12px 16px;
                width: 100%;
                border-radius: 8px;
                font-size: 1rem;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-search {
                display: none;
            }
            .btn-header {
                padding: 7px 14px;
                font-size: 0.8rem;
                gap: 4px;
            }
            .btn-header i {
                font-size: 0.75rem;
            }
            .header-inner {
                height: 60px;
            }
        }
        @media (max-width: 480px) {
            .logo-text {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .btn-header {
                padding: 6px 12px;
                font-size: 0.75rem;
            }
            .site-header {
                padding: 0 12px;
            }
        }

        /* Page Hero / Banner */
        .page-banner {
            position: relative;
            padding: 80px 0 64px;
            background: linear-gradient(135deg, #0a1628 0%, #142850 50%, #0d3ea8 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26, 92, 255, 0.25) 0%, transparent 70%);
        }
        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        .banner-content h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .banner-content p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .banner-tags {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .banner-tags span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .banner-tags span i {
            font-size: 0.7rem;
            color: var(--secondary);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 60px 0 48px;
                min-height: 240px;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
            .banner-content p {
                font-size: 1rem;
            }
            .banner-tags span {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }
        @media (max-width: 480px) {
            .banner-content h1 {
                font-size: 1.6rem;
            }
            .banner-content p {
                font-size: 0.9rem;
            }
        }

        /* Section通用 */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-sm {
            padding: 48px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-soft);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .title-accent {
            display: inline-block;
            width: 50px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin-top: 12px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
            .section-title p {
                font-size: 0.95rem;
            }
            .section-title {
                margin-bottom: 32px;
            }
        }

        /* Cards Grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 232, 240, 0.5);
            transition: var(--transition);
        }
        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .card-item .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin-bottom: 18px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }
        .card-item .card-icon.green {
            background: linear-gradient(135deg, var(--secondary), #00a07a);
        }
        .card-item .card-icon.orange {
            background: linear-gradient(135deg, var(--accent), #e05520);
        }
        .card-item .card-icon.purple {
            background: linear-gradient(135deg, #7c3aed, #5b21b6);
        }
        .card-item h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text);
        }
        .card-item p {
            font-size: 0.95rem;
            color: var(--text-soft);
            line-height: 1.7;
        }
        .card-item .card-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--primary-light);
            color: var(--primary);
            margin-top: 14px;
        }
        .card-item .card-tag.green {
            background: var(--secondary-light);
            color: #00a07a;
        }
        .card-item .card-tag.orange {
            background: #fff0e8;
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .card-item {
                padding: 24px 20px;
            }
        }

        /* Process / Steps */
        .steps-wrap {
            display: flex;
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            flex: 1;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 232, 240, 0.4);
            position: relative;
            transition: var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(26, 92, 255, 0.25);
        }
        .step-item .step-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 14px;
            margin-top: 8px;
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-soft);
        }
        @media (max-width: 768px) {
            .steps-wrap {
                flex-direction: column;
                gap: 20px;
            }
            .step-item {
                padding: 28px 20px;
            }
        }

        /* 数据卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 232, 240, 0.4);
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: var(--text-soft);
            font-weight: 500;
        }
        .stat-item .stat-icon {
            font-size: 1.4rem;
            color: var(--primary-light);
            margin-bottom: 8px;
        }
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: 0 2px 12px rgba(26, 92, 255, 0.06);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            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.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-soft);
            line-height: 1.7;
        }
        @media (max-width: 640px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-block h3 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-block p {
            font-size: 1.05rem;
            opacity: 0.9;
            max-width: 520px;
            margin: 0 auto 24px;
            position: relative;
            z-index: 1;
        }
        .cta-block .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 10px;
            font-size: 1.05rem;
            font-weight: 600;
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
            position: relative;
            z-index: 1;
        }
        .cta-block .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }
        @media (max-width: 768px) {
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h3 {
                font-size: 1.5rem;
            }
            .cta-block p {
                font-size: 0.95rem;
            }
            .cta-block .btn-cta {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        /* 安全特性列表 */
        .feature-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            max-width: 800px;
            margin: 0 auto;
        }
        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-card);
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .feature-item:hover {
            border-color: var(--primary-light);
            box-shadow: 0 4px 16px rgba(26, 92, 255, 0.06);
        }
        .feature-item .fi-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .feature-item .fi-icon.green {
            background: var(--secondary-light);
            color: #00a07a;
        }
        .feature-item .fi-text h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .feature-item .fi-text p {
            font-size: 0.9rem;
            color: var(--text-soft);
        }
        @media (max-width: 768px) {
            .feature-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .feature-item {
                padding: 16px 18px;
            }
        }

        /* Footer */
        .site-footer {
            background: #0f1724;
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 24px 0;
        }
        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo-wrap {
            margin-bottom: 14px;
        }
        .footer-brand .logo-text {
            background: linear-gradient(135deg, #fff, #a0b4ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-col ul li i {
            color: rgba(255, 255, 255, 0.3);
            width: 16px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding: 16px 0;
            }
            .site-footer {
                padding: 40px 16px 0;
            }
        }

        /* 登录方式切换tab（页面内） */
        .method-tabs {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .method-tab {
            padding: 10px 28px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            background: #f1f4fa;
            color: var(--text-soft);
            cursor: pointer;
            transition: var(--transition);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .method-tab:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .method-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 92, 255, 0.2);
        }
        .method-tab i {
            font-size: 0.85rem;
        }
        @media (max-width: 640px) {
            .method-tab {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
        }

        /* 工具类 */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .mb-8 {
            margin-bottom: 32px;
        }
        .gap-4 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* 登录demo面板 */
        .login-demo {
            max-width: 460px;
            margin: 0 auto;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 32px;
            box-shadow: var(--shadow-hover);
            border: 1px solid var(--border);
        }
        .login-demo .ld-title {
            font-size: 1.3rem;
            font-weight: 600;
            text-align: center;
            margin-bottom: 24px;
            color: var(--text);
        }
        .login-demo .ld-field {
            margin-bottom: 18px;
        }
        .login-demo .ld-field label {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-soft);
            display: block;
            margin-bottom: 6px;
        }
        .login-demo .ld-field input {
            width: 100%;
            padding: 12px 16px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: #f9fafc;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .login-demo .ld-field input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.1);
            background: #fff;
        }
        .login-demo .ld-btn {
            width: 100%;
            padding: 14px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            box-shadow: 0 4px 16px rgba(26, 92, 255, 0.2);
        }
        .login-demo .ld-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(26, 92, 255, 0.3);
        }
        .login-demo .ld-extra {
            text-align: center;
            margin-top: 16px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .login-demo .ld-extra a {
            color: var(--primary);
            font-weight: 500;
        }
        .login-demo .ld-extra a:hover {
            text-decoration: underline;
        }
        .login-demo .ld-divider {
            display: flex;
            align-items: center;
            gap: 12px;
            margin: 20px 0;
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .login-demo .ld-divider::before,
        .login-demo .ld-divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: var(--border);
        }
        .login-demo .ld-social {
            display: flex;
            justify-content: center;
            gap: 16px;
        }
        .login-demo .ld-social a {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-soft);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .login-demo .ld-social a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
        }
        @media (max-width: 520px) {
            .login-demo {
                padding: 24px 18px;
            }
        }

        /* 圆角图片展示 */
        .img-showcase {
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .img-showcase-wrap {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .img-showcase-wrap:hover {
            box-shadow: var(--shadow-hover);
            transform: scale(1.01);
        }

        /* 二维码模拟 */
        .qr-placeholder {
            width: 120px;
            height: 120px;
            background: #f1f4fa;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.8rem;
            color: var(--text-muted);
            margin: 0 auto 12px;
            border: 2px dashed var(--border);
        }

/* roulang page: category2 */
:root {
            --primary: #1a5cff;
            --primary-dark: #0e3fa8;
            --primary-light: #4a7bff;
            --secondary: #00c9a7;
            --secondary-dark: #00a085;
            --accent: #ff6b35;
            --bg-light: #f7f9fc;
            --bg-white: #ffffff;
            --text-dark: #1a1a2e;
            --text-muted: #5a6a7a;
            --text-light: #8a9bb0;
            --border: #e2e8f0;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            color: var(--text-dark);
            background: var(--bg-light);
            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;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            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);
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 68px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(26, 92, 255, 0.3);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--text-dark), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }
        @media (max-width: 640px) {
            .logo-text {
                font-size: 17px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .header-inner {
                padding: 0 16px;
                height: 60px;
            }
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-list a {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .nav-list a i {
            font-size: 14px;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }
        .nav-list a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.10);
            font-weight: 600;
        }
        @media (max-width: 900px) {
            .nav-list {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 999;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                padding: 12px 16px;
                font-size: 16px;
                width: 100%;
                border-radius: 10px;
            }
            .nav-list a i {
                width: 20px;
            }
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 24px;
            padding: 0 12px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.12);
        }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 6px;
            font-size: 14px;
            outline: none;
            width: 100px;
            color: var(--text-dark);
        }
        .nav-search input::placeholder {
            color: var(--text-light);
        }
        .nav-search button {
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
            padding: 4px;
            font-size: 15px;
            transition: var(--transition);
        }
        .nav-search button:hover {
            color: var(--primary);
        }
        @media (max-width: 640px) {
            .nav-search {
                display: none;
            }
        }

        .btn-header {
            padding: 8px 20px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 24px;
            font-size: 14px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(26, 92, 255, 0.25);
            white-space: nowrap;
        }
        .btn-header:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(26, 92, 255, 0.35);
            color: #fff;
        }
        @media (max-width: 640px) {
            .btn-header {
                padding: 6px 14px;
                font-size: 13px;
            }
            .btn-header i {
                display: none;
            }
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-dark);
            cursor: pointer;
            padding: 6px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: var(--bg-light);
        }
        @media (max-width: 900px) {
            .mobile-toggle {
                display: block;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        .footer-brand .logo-wrap {
            margin-bottom: 14px;
        }
        .footer-brand .logo-icon {
            width: 36px;
            height: 36px;
            font-size: 16px;
        }
        .footer-brand .logo-text {
            font-size: 18px;
            -webkit-text-fill-color: #fff;
            background: none;
            color: #fff;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94a3b8;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #f1f5f9;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 14px;
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a {
            color: #94a3b8;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #64748b;
        }
        .footer-bottom a {
            color: #94a3b8;
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 520px) {
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Page Specific Styles ===== */
        .page-banner {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0e3fa8 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-banner h1 {
            color: #fff;
            font-size: 42px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 18px;
            max-width: 640px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .page-banner .badge-group {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .page-banner .badge-group span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 56px 0 44px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 16px;
            }
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            color: var(--text-dark);
        }
        .section-sub {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 560px;
            margin-bottom: 40px;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 15px;
                margin-bottom: 28px;
            }
        }

        .app-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
            border: 1px solid var(--border);
        }
        .app-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .app-card .card-img {
            height: 200px;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 48px;
            color: var(--primary);
            position: relative;
            overflow: hidden;
        }
        .app-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .app-card .card-body {
            padding: 24px;
        }
        .app-card .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .app-card .card-body p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .app-card .card-body .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--primary);
            color: #fff;
            border-radius: 24px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
        }
        .app-card .card-body .btn-download:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(26, 92, 255, 0.30);
        }
        .app-card .card-body .btn-download.outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .app-card .card-body .btn-download.outline:hover {
            background: var(--primary);
            color: #fff;
        }

        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 900px) {
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .step-grid {
                grid-template-columns: 1fr;
            }
        }
        .step-item {
            text-align: center;
            background: var(--bg-white);
            padding: 32px 20px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .step-num {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 6px 18px rgba(26, 92, 255, 0.20);
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .step-item p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 900px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }
        .feature-item {
            background: var(--bg-white);
            padding: 28px 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .feature-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            background: rgba(26, 92, 255, 0.08);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .feature-item h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 900px) {
            .review-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .review-grid {
                grid-template-columns: 1fr;
            }
        }
        .review-card {
            background: var(--bg-white);
            padding: 28px 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .review-card .stars {
            color: #fbbf24;
            font-size: 14px;
            margin-bottom: 12px;
        }
        .review-card blockquote {
            font-size: 15px;
            color: var(--text-dark);
            line-height: 1.8;
            margin-bottom: 16px;
            font-style: italic;
        }
        .review-card .author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .review-card .author .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--primary);
        }
        .review-card .author .name {
            font-weight: 600;
            font-size: 14px;
        }
        .review-card .author .role {
            font-size: 12px;
            color: var(--text-light);
        }

        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-dark);
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: var(--transition);
            font-size: 14px;
            color: var(--text-light);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 64px 0;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            opacity: 0.85;
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: #fff;
            color: var(--primary);
            border-radius: 40px;
            font-size: 16px;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
        }
        @media (max-width: 640px) {
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .cta-section .btn-cta {
                padding: 12px 28px;
                font-size: 15px;
            }
        }

        .platform-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 16px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(26, 92, 255, 0.08);
            color: var(--primary);
        }
        .platform-badge.ios {
            background: rgba(0, 0, 0, 0.06);
            color: #333;
        }
        .platform-badge.android {
            background: rgba(0, 201, 167, 0.10);
            color: var(--secondary-dark);
        }

        .version-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 12px;
            font-size: 12px;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--text-muted);
        }

        .app-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        @media (max-width: 900px) {
            .app-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .app-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            padding: 16px 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text-dark);
            font-weight: 500;
        }
        .breadcrumb i {
            font-size: 10px;
            color: var(--text-light);
        }

        /* Stats */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 900px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stat-grid {
                grid-template-columns: 1fr;
            }
        }
        .stat-item {
            background: var(--bg-white);
            padding: 28px 20px;
            border-radius: var(--radius);
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .stat-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-item .num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 6px;
        }
        .stat-item .icon {
            font-size: 28px;
            color: var(--primary-light);
            margin-bottom: 12px;
            opacity: 0.6;
        }

/* roulang page: category3 */
:root {
            --primary: #1a56db;
            --primary-dark: #0f3a8c;
            --primary-light: #3b82f6;
            --secondary: #0ea5e9;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 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);
            --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
        }
        * { margin:0; padding:0; box-sizing:border-box; }
        body { font-family:var(--font-sans); background:var(--bg); color:var(--text); line-height:1.6; -webkit-font-smoothing:antialiased; }
        img { max-width:100%; height:auto; display:block; border-radius:var(--radius-sm); }
        a { color:var(--primary); text-decoration:none; transition:var(--transition); }
        a:hover { color:var(--primary-dark); }
        .container { max-width:1200px; margin:0 auto; padding:0 24px; }
        /* Header */
        .site-header { background:#fff; border-bottom:1px solid var(--border); position:sticky; top:0; z-index:100; backdrop-filter:blur(12px); background:rgba(255,255,255,0.95); }
        .header-inner { display:flex; align-items:center; justify-content:space-between; max-width:1200px; margin:0 auto; padding:0 24px; height:70px; gap:20px; }
        .logo-wrap { display:flex; align-items:center; gap:10px; flex-shrink:0; }
        .logo-icon { width:40px; height:40px; border-radius:12px; background:linear-gradient(135deg,var(--primary),var(--secondary)); display:flex; align-items:center; justify-content:center; color:#fff; font-size:1.2rem; box-shadow:0 4px 12px rgba(26,86,219,0.3); }
        .logo-text { font-size:1.35rem; font-weight:700; background:linear-gradient(135deg,var(--primary),var(--secondary)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; letter-spacing:-0.02em; }
        .nav-list { display:flex; align-items:center; gap:6px; flex-wrap:nowrap; }
        .nav-list a { padding:8px 18px; border-radius:var(--radius-sm); font-size:0.95rem; font-weight:500; color:var(--text); transition:var(--transition); white-space:nowrap; display:flex; align-items:center; gap:8px; }
        .nav-list a i { font-size:0.85rem; opacity:0.7; }
        .nav-list a:hover { background:rgba(26,86,219,0.06); color:var(--primary); }
        .nav-list a.active { background:var(--primary); color:#fff; box-shadow:0 4px 14px rgba(26,86,219,0.25); }
        .nav-list a.active i { opacity:1; }
        .nav-right { display:flex; align-items:center; gap:12px; flex-shrink:0; }
        .nav-search { display:flex; align-items:center; background:var(--bg); border:1px solid var(--border); border-radius:30px; padding:0 4px 0 16px; transition:var(--transition); }
        .nav-search:focus-within { border-color:var(--primary); box-shadow:0 0 0 3px rgba(26,86,219,0.1); }
        .nav-search input { border:none; background:transparent; padding:8px 0; font-size:0.9rem; outline:none; width:140px; color:var(--text); }
        .nav-search input::placeholder { color:var(--text-muted); }
        .nav-search button { width:34px; height:34px; border:none; border-radius:50%; background:transparent; color:var(--text-muted); cursor:pointer; transition:var(--transition); display:flex; align-items:center; justify-content:center; }
        .nav-search button:hover { background:var(--primary); color:#fff; }
        .btn-header { display:inline-flex; align-items:center; gap:8px; padding:10px 24px; border-radius:30px; background:linear-gradient(135deg,var(--primary),var(--secondary)); color:#fff; font-weight:600; font-size:0.9rem; transition:var(--transition); box-shadow:0 4px 14px rgba(26,86,219,0.3); white-space:nowrap; }
        .btn-header:hover { transform:translateY(-2px); box-shadow:0 8px 28px rgba(26,86,219,0.4); color:#fff; }
        .mobile-toggle { display:none; width:42px; height:42px; border:none; border-radius:12px; background:transparent; color:var(--text); font-size:1.3rem; cursor:pointer; transition:var(--transition); align-items:center; justify-content:center; }
        .mobile-toggle:hover { background:rgba(26,86,219,0.06); }
        /* Page Banner */
        .page-banner { background:linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%); padding:80px 0 70px; position:relative; overflow:hidden; }
        .page-banner::before { content:''; position:absolute; inset:0; background:url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity:0.12; mix-blend-mode:overlay; }
        .page-banner .container { position:relative; z-index:2; }
        .page-banner h1 { font-size:2.8rem; font-weight:800; color:#fff; line-height:1.2; margin-bottom:16px; letter-spacing:-0.02em; }
        .page-banner p { font-size:1.15rem; color:rgba(255,255,255,0.8); max-width:640px; line-height:1.7; }
        .page-banner .breadcrumb { display:flex; align-items:center; gap:10px; margin-bottom:24px; font-size:0.9rem; color:rgba(255,255,255,0.6); }
        .page-banner .breadcrumb a { color:rgba(255,255,255,0.7); }
        .page-banner .breadcrumb a:hover { color:#fff; }
        .page-banner .breadcrumb i { font-size:0.7rem; }
        /* Section */
        .section { padding:80px 0; }
        .section-alt { background:#fff; }
        .section-title { font-size:2rem; font-weight:700; color:var(--text); margin-bottom:12px; letter-spacing:-0.01em; }
        .section-subtitle { font-size:1.05rem; color:var(--text-muted); max-width:620px; line-height:1.7; margin-bottom:40px; }
        .section-title-center { text-align:center; }
        .section-subtitle-center { margin-left:auto; margin-right:auto; text-align:center; }
        /* Cards */
        .card { background:var(--bg-card); border-radius:var(--radius); box-shadow:var(--shadow); padding:28px; transition:var(--transition); border:1px solid rgba(0,0,0,0.02); }
        .card:hover { transform:translateY(-4px); box-shadow:var(--shadow-hover); border-color:rgba(26,86,219,0.08); }
        .card-icon { width:56px; height:56px; border-radius:16px; display:flex; align-items:center; justify-content:center; font-size:1.5rem; color:#fff; margin-bottom:18px; }
        .card h3 { font-size:1.2rem; font-weight:600; margin-bottom:10px; }
        .card p { color:var(--text-muted); font-size:0.95rem; line-height:1.7; }
        /* Grid */
        .grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
        .grid-2 { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
        .grid-4 { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
        /* Stats */
        .stat-card { text-align:center; padding:32px 20px; background:var(--bg-card); border-radius:var(--radius); box-shadow:var(--shadow); border:1px solid rgba(0,0,0,0.02); }
        .stat-number { font-size:2.6rem; font-weight:800; background:linear-gradient(135deg,var(--primary),var(--secondary)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; line-height:1.2; }
        .stat-label { color:var(--text-muted); font-size:0.95rem; margin-top:6px; }
        /* Badge */
        .badge { display:inline-flex; align-items:center; gap:6px; padding:4px 14px; border-radius:30px; font-size:0.8rem; font-weight:500; background:rgba(26,86,219,0.08); color:var(--primary); }
        .badge-green { background:rgba(16,185,129,0.1); color:#059669; }
        .badge-amber { background:rgba(245,158,11,0.1); color:#d97706; }
        /* FAQ */
        .faq-item { border-bottom:1px solid var(--border); padding:20px 0; }
        .faq-question { display:flex; justify-content:space-between; align-items:center; cursor:pointer; font-weight:600; font-size:1.05rem; gap:16px; }
        .faq-question i { color:var(--primary); transition:var(--transition); font-size:0.9rem; flex-shrink:0; }
        .faq-answer { padding-top:14px; color:var(--text-muted); line-height:1.8; max-height:0; overflow:hidden; transition:max-height 0.4s ease, padding 0.3s ease; }
        .faq-item.open .faq-answer { max-height:400px; padding-top:14px; }
        .faq-item.open .faq-question i { transform:rotate(180deg); }
        /* CTA */
        .cta-section { background:linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%); padding:80px 0; text-align:center; position:relative; overflow:hidden; }
        .cta-section::before { content:''; position:absolute; inset:0; background:url('/assets/images/backpic/back-3.png') center/cover no-repeat; opacity:0.08; mix-blend-mode:overlay; }
        .cta-section .container { position:relative; z-index:2; }
        .cta-section h2 { font-size:2.2rem; font-weight:700; color:#fff; margin-bottom:16px; }
        .cta-section p { color:rgba(255,255,255,0.75); font-size:1.1rem; max-width:560px; margin:0 auto 32px; }
        .btn-cta { display:inline-flex; align-items:center; gap:10px; padding:16px 40px; border-radius:40px; background:#fff; color:var(--primary); font-weight:700; font-size:1.05rem; transition:var(--transition); box-shadow:0 8px 30px rgba(0,0,0,0.2); }
        .btn-cta:hover { transform:translateY(-3px); box-shadow:0 12px 40px rgba(0,0,0,0.3); color:var(--primary-dark); }
        .btn-cta i { transition:var(--transition); }
        .btn-cta:hover i { transform:translateX(4px); }
        /* Footer */
        .site-footer { background:#0f172a; color:rgba(255,255,255,0.7); padding:60px 0 0; }
        .footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1.2fr; gap:40px; padding-bottom:40px; border-bottom:1px solid rgba(255,255,255,0.08); }
        .footer-brand .logo-text { -webkit-text-fill-color:#fff; background:none; color:#fff; }
        .footer-brand p { font-size:0.9rem; line-height:1.8; margin-top:12px; color:rgba(255,255,255,0.6); }
        .footer-col h4 { color:#fff; font-size:1rem; font-weight:600; margin-bottom:18px; }
        .footer-col ul { list-style:none; }
        .footer-col ul li { margin-bottom:10px; }
        .footer-col ul li a { color:rgba(255,255,255,0.6); font-size:0.9rem; transition:var(--transition); display:flex; align-items:center; gap:8px; }
        .footer-col ul li a:hover { color:#fff; padding-left:4px; }
        .footer-col ul li i { color:var(--secondary); }
        .footer-bottom { display:flex; justify-content:space-between; align-items:center; padding:24px 0; font-size:0.85rem; color:rgba(255,255,255,0.4); flex-wrap:wrap; gap:12px; }
        .footer-bottom a { color:rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color:#fff; }
        /* Timeline / Steps */
        .step-list { counter-reset:step; display:flex; flex-direction:column; gap:28px; max-width:700px; }
        .step-item { display:flex; gap:20px; align-items:flex-start; counter-increment:step; }
        .step-num { width:44px; height:44px; border-radius:50%; background:linear-gradient(135deg,var(--primary),var(--secondary)); color:#fff; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:1.1rem; flex-shrink:0; box-shadow:0 4px 14px rgba(26,86,219,0.25); }
        .step-content h4 { font-weight:600; font-size:1.1rem; margin-bottom:4px; }
        .step-content p { color:var(--text-muted); font-size:0.95rem; }
        /* Responsive */
        @media (max-width:1024px) {
            .grid-4 { grid-template-columns:repeat(2,1fr); }
            .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
        }
        @media (max-width:768px) {
            .nav-list { display:none; position:absolute; top:70px; left:0; right:0; background:#fff; flex-direction:column; padding:16px 24px; gap:4px; border-bottom:1px solid var(--border); box-shadow:0 20px 40px rgba(0,0,0,0.08); }
            .nav-list.open { display:flex; }
            .nav-list a { width:100%; padding:12px 16px; }
            .nav-search input { width:100px; }
            .nav-search { display:none; }
            .mobile-toggle { display:flex; }
            .page-banner h1 { font-size:2rem; }
            .page-banner { padding:60px 0 50px; }
            .section { padding:50px 0; }
            .grid-3 { grid-template-columns:1fr; }
            .grid-2 { grid-template-columns:1fr; }
            .grid-4 { grid-template-columns:1fr 1fr; }
            .section-title { font-size:1.6rem; }
            .cta-section h2 { font-size:1.6rem; }
            .footer-grid { grid-template-columns:1fr; gap:28px; }
            .footer-bottom { flex-direction:column; text-align:center; }
            .btn-header span { display:none; }
        }
        @media (max-width:520px) {
            .header-inner { padding:0 16px; gap:10px; }
            .page-banner h1 { font-size:1.6rem; }
            .grid-4 { grid-template-columns:1fr; }
            .stat-number { font-size:2rem; }
            .logo-text { font-size:1.1rem; }
            .nav-search { display:none; }
            .btn-header { padding:8px 16px; font-size:0.8rem; }
        }
        /* Smooth scroll */
        html { scroll-behavior:smooth; }
        /* Focus outline */
        a:focus-visible, button:focus-visible, input:focus-visible { outline:2px solid var(--primary); outline-offset:2px; border-radius:4px; }
        /* Tooltip / tag list */
        .tag-list { display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
        .tag { padding:4px 14px; border-radius:30px; font-size:0.8rem; background:rgba(26,86,219,0.06); color:var(--primary); border:1px solid rgba(26,86,219,0.12); transition:var(--transition); }
        .tag:hover { background:var(--primary); color:#fff; border-color:var(--primary); }
        /* Cover image card */
        .cover-card { border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow); background:var(--bg-card); transition:var(--transition); border:1px solid rgba(0,0,0,0.02); }
        .cover-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-hover); }
        .cover-card img { width:100%; height:200px; object-fit:cover; border-radius:0; }
        .cover-card-body { padding:20px; }
        .cover-card-body h3 { font-size:1.1rem; font-weight:600; margin-bottom:8px; }
        .cover-card-body p { color:var(--text-muted); font-size:0.9rem; line-height:1.7; }
        /* Alert / info box */
        .info-box { background:rgba(26,86,219,0.04); border-left:4px solid var(--primary); padding:20px 24px; border-radius:0 var(--radius-sm) var(--radius-sm) 0; margin:20px 0; }
        .info-box p { color:var(--text); font-size:0.95rem; }
        .info-box i { color:var(--primary); margin-right:10px; }