/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF6B35;
            --primary-dark: #E55A2B;
            --primary-light: #FFF0E8;
            --secondary: #2B2D42;
            --accent: #FFB703;
            --accent-light: #FFF8E1;
            --bg-body: #FFFFFF;
            --bg-section: #F8F9FA;
            --bg-card: #FFFFFF;
            --text-primary: #1A1A2E;
            --text-secondary: #6C757D;
            --text-light: #ADB5BD;
            --border-color: #E9ECEF;
            --border-light: #F1F3F5;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-hover: 0 12px 32px rgba(255,107,53,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Base Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-body);
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        h4 { font-size: clamp(1rem, 2vw, 1.25rem); }
        p { color: var(--text-secondary); margin-bottom: 0; }
        .container { max-width: var(--container-max); padding-left: 20px; padding-right: 20px; margin: 0 auto; width: 100%; }

        /* ===== Buttons ===== */
        .btn-custom {
            display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px;
            border-radius: 50px; font-weight: 600; font-size: 15px; line-height: 1.4;
            border: none; cursor: pointer; transition: var(--transition);
            text-decoration: none; white-space: nowrap;
        }
        .btn-custom:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
        .btn-primary-custom {
            background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(255,107,53,0.35);
        }
        .btn-primary-custom:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,53,0.4); }
        .btn-primary-custom:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(255,107,53,0.3); }
        .btn-outline-custom {
            background: transparent; color: var(--text-primary); border: 2px solid var(--border-color);
        }
        .btn-outline-custom:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); transform: translateY(-2px); }
        .btn-outline-custom:active { transform: translateY(0); }
        .btn-accent-custom {
            background: var(--accent); color: var(--secondary); box-shadow: 0 4px 14px rgba(255,183,3,0.35);
        }
        .btn-accent-custom:hover { background: #F0A800; color: var(--secondary); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,183,3,0.4); }
        .btn-sm { padding: 8px 20px; font-size: 13px; }
        .btn-lg { padding: 16px 36px; font-size: 17px; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1050;
            height: var(--header-height); background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light); transition: var(--transition);
        }
        .site-header .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }
        .logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; display: flex; align-items: center; gap: 8px; }
        .logo:hover { color: var(--primary-dark); }
        .logo i { font-size: 1.3rem; }
        .nav-links { display: flex; align-items: center; gap: 4px; }
        .nav-links a {
            padding: 8px 16px; border-radius: 50px; font-size: 14px; font-weight: 500;
            color: var(--text-secondary); text-decoration: none; transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover { color: var(--primary); background: var(--primary-light); }
        .nav-links a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .nav-right { display: flex; align-items: center; gap: 12px; }
        .nav-search {
            display: flex; align-items: center; background: var(--bg-section);
            border-radius: 50px; padding: 6px 16px; border: 1px solid var(--border-color);
            transition: var(--transition); width: 200px;
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(255,107,53,0.1); width: 240px; }
        .nav-search i { color: var(--text-light); font-size: 14px; margin-right: 8px; }
        .nav-search input {
            border: none; background: transparent; padding: 6px 0; font-size: 14px;
            color: var(--text-primary); width: 100%; outline: none;
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text-primary); cursor: pointer; padding: 4px; }
        .nav-toggle:hover { color: var(--primary); }
        .mobile-overlay { display: none; }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh; display: flex; align-items: center; position: relative;
            padding: calc(var(--header-height) + 40px) 0 80px; overflow: hidden;
            background: linear-gradient(135deg, #FFF8F5 0%, #FFF0E8 40%, #FFF8E1 100%);
        }
        .hero-bg {
            position: absolute; inset: 0; z-index: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center; background-repeat: no-repeat;
            opacity: 0.5; mix-blend-mode: overlay;
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-content { max-width: 640px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 6px; padding: 6px 18px;
            background: var(--accent-light); color: #8B6B00; border-radius: 50px;
            font-size: 13px; font-weight: 600; margin-bottom: 20px;
        }
        .hero h1 { margin-bottom: 16px; }
        .hero h1 span { color: var(--primary); }
        .hero p { font-size: 1.1rem; margin-bottom: 32px; max-width: 520px; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
        .hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border-color); }
        .hero-stat { text-align: left; }
        .hero-stat .num { font-size: 1.8rem; font-weight: 800; color: var(--primary); display: block; }
        .hero-stat .label { font-size: 14px; color: var(--text-secondary); }

        /* ===== Sections ===== */
        .section { padding: 80px 0; }
        .section-header { text-align: center; max-width: 680px; margin: 0 auto 48px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { font-size: 1.05rem; }
        .section-divider { width: 60px; height: 4px; background: var(--primary); border-radius: 4px; margin: 16px auto; }

        /* ===== Cards ===== */
        .card-modern {
            background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border-color);
            padding: 28px; transition: var(--transition); height: 100%;
        }
        .card-modern:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
        .card-modern .card-icon { width: 52px; height: 52px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 16px; color: #fff; }
        .card-modern h3 { margin-bottom: 8px; }
        .card-modern p { font-size: 14px; color: var(--text-secondary); }
        .card-modern .card-tag { display: inline-block; padding: 2px 12px; border-radius: 50px; font-size: 12px; font-weight: 600; background: var(--primary-light); color: var(--primary); margin-bottom: 12px; }

        /* ===== Category Cards ===== */
        .category-card {
            position: relative; border-radius: var(--radius-lg); overflow: hidden;
            background: var(--bg-card); border: 1px solid var(--border-color);
            transition: var(--transition); height: 100%; display: flex; flex-direction: column;
        }
        .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .category-card .card-img {
            height: 200px; background-size: cover; background-position: center;
            position: relative; overflow: hidden;
        }
        .category-card .card-img .overlay {
            position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.5) 100%);
        }
        .category-card .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
        .category-card .card-body h3 { margin-bottom: 8px; }
        .category-card .card-body p { font-size: 14px; flex: 1; }
        .category-card .card-footer { padding: 16px 24px; border-top: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; }
        .category-card .card-footer a { font-size: 14px; font-weight: 600; color: var(--primary); }
        .category-card .card-footer a:hover { gap: 4px; }
        .category-card .card-footer a i { transition: var(--transition); }
        .category-card .card-footer a:hover i { transform: translateX(4px); }

        /* ===== News / CMS List ===== */
        .news-card {
            display: flex; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--border-light);
            transition: var(--transition); align-items: flex-start;
        }
        .news-card:last-child { border-bottom: none; }
        .news-card:hover { padding-left: 8px; }
        .news-card .news-img {
            width: 120px; min-width: 120px; height: 80px; border-radius: var(--radius-sm);
            background-size: cover; background-position: center; background-color: var(--bg-section);
            flex-shrink: 0;
        }
        .news-card .news-info { flex: 1; }
        .news-card .news-info .news-tag {
            display: inline-block; padding: 2px 10px; border-radius: 50px; font-size: 11px; font-weight: 600;
            background: var(--primary-light); color: var(--primary); margin-bottom: 6px;
        }
        .news-card .news-info h4 { font-size: 1rem; margin-bottom: 4px; font-weight: 600; }
        .news-card .news-info h4 a { color: var(--text-primary); text-decoration: none; }
        .news-card .news-info h4 a:hover { color: var(--primary); }
        .news-card .news-info p { font-size: 13px; color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .news-info .news-meta { font-size: 12px; color: var(--text-light); margin-top: 6px; display: flex; gap: 16px; }
        .news-empty { padding: 40px 20px; text-align: center; color: var(--text-secondary); background: var(--bg-section); border-radius: var(--radius-md); }

        /* ===== Features ===== */
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .feature-item { text-align: center; padding: 32px 20px; border-radius: var(--radius-md); transition: var(--transition); }
        .feature-item:hover { background: var(--bg-section); }
        .feature-item .feat-icon { width: 64px; height: 64px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.6rem; color: #fff; }
        .feature-item h4 { margin-bottom: 8px; }
        .feature-item p { font-size: 14px; }

        /* ===== Steps / Process ===== */
        .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .step-item { text-align: center; position: relative; padding: 0 12px; }
        .step-item .step-num {
            width: 48px; height: 48px; border-radius: 50%; background: var(--primary-light); color: var(--primary);
            display: flex; align-items: center; justify-content: center; font-size: 1.2rem; font-weight: 800;
            margin: 0 auto 16px; position: relative; z-index: 1;
        }
        .step-item h4 { font-size: 1rem; margin-bottom: 6px; }
        .step-item p { font-size: 13px; color: var(--text-secondary); }
        .step-item::after {
            content: ''; position: absolute; top: 24px; left: calc(50% + 36px); right: calc(-50% + 36px);
            height: 2px; background: var(--border-color); z-index: 0;
        }
        .step-item:last-child::after { display: none; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item { border: 1px solid var(--border-color); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            padding: 18px 24px; display: flex; align-items: center; justify-content: space-between;
            cursor: pointer; background: var(--bg-body); font-weight: 600; font-size: 15px;
            transition: var(--transition); border: none; width: 100%; text-align: left; color: var(--text-primary);
        }
        .faq-question:hover { background: var(--primary-light); }
        .faq-question i { transition: var(--transition); color: var(--text-light); font-size: 14px; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; }
        .faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 18px; }
        .faq-answer p { font-size: 14px; color: var(--text-secondary); }

        /* ===== CTA ===== */
        .cta-section { background: linear-gradient(135deg, var(--secondary) 0%, #1A1A2E 100%); border-radius: var(--radius-lg); padding: 64px; text-align: center; position: relative; overflow: hidden; margin: 0 auto; }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover; background-position: center; opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-section * { position: relative; z-index: 1; }
        .cta-section h2 { color: #fff; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.7); margin-bottom: 28px; max-width: 560px; margin-left: auto; margin-right: auto; }

        /* ===== Footer ===== */
        .site-footer { background: var(--secondary); color: rgba(255,255,255,0.7); padding: 48px 0 24px; }
        .site-footer .container { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .site-footer .footer-brand .logo-footer { font-size: 1.4rem; font-weight: 800; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
        .site-footer .footer-brand p { font-size: 14px; color: rgba(255,255,255,0.5); max-width: 280px; }
        .site-footer h4 { color: #fff; font-size: 14px; font-weight: 700; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.5px; }
        .site-footer ul li { margin-bottom: 8px; }
        .site-footer ul li a { color: rgba(255,255,255,0.6); font-size: 14px; text-decoration: none; transition: var(--transition); }
        .site-footer ul li a:hover { color: var(--primary); padding-left: 4px; }
        .site-footer .footer-bottom { grid-column: 1 / -1; border-top: 1px solid rgba(255,255,255,0.08); padding-top: 20px; margin-top: 32px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
        .site-footer .footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); }
        .site-footer .footer-bottom .social-links { display: flex; gap: 12px; }
        .site-footer .footer-bottom .social-links a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); font-size: 14px; transition: var(--transition); text-decoration: none; }
        .site-footer .footer-bottom .social-links a:hover { background: var(--primary); color: #fff; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
            .step-item::after { display: none; }
            .site-footer .container { grid-template-columns: 1fr 1fr; gap: 32px; }
            .site-footer .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            .nav-links { display: none; }
            .nav-search { display: none; }
            .nav-toggle { display: block; }
            .nav-right .btn-custom { display: none; }
            .mobile-open .nav-links {
                display: flex; flex-direction: column; position: fixed; top: var(--header-height);
                left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px);
                padding: 20px; border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-lg);
                z-index: 1040; gap: 4px;
            }
            .mobile-open .nav-links a { padding: 12px 16px; font-size: 16px; border-radius: var(--radius-sm); }
            .mobile-open .nav-search { display: flex; width: 100%; margin: 12px 0; }
            .hero { min-height: auto; padding: calc(var(--header-height) + 32px) 0 48px; }
            .hero-stats { gap: 20px; flex-wrap: wrap; }
            .hero-stat .num { font-size: 1.4rem; }
            .section { padding: 48px 0; }
            .section-header { margin-bottom: 32px; }
            .news-card { flex-direction: column; }
            .news-card .news-img { width: 100%; min-width: unset; height: 160px; }
            .feature-grid { grid-template-columns: 1fr; }
            .steps { grid-template-columns: 1fr; gap: 24px; }
            .cta-section { padding: 40px 24px; border-radius: var(--radius-md); }
            .site-footer .container { grid-template-columns: 1fr; gap: 24px; }
            .site-footer .footer-bottom { flex-direction: column; text-align: center; }
            .category-card .card-img { height: 160px; }
        }
        @media (max-width: 520px) {
            .container { padding-left: 16px; padding-right: 16px; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn-custom { width: 100%; justify-content: center; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.95rem; }
            .card-modern { padding: 20px; }
            .news-card .news-img { height: 120px; }
            .faq-question { padding: 14px 16px; font-size: 14px; }
            .faq-answer { padding: 0 16px; }
            .faq-item.active .faq-answer { padding: 0 16px 14px; }
        }

        /* ===== Accessibility ===== */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
        }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

        /* ===== Extra polish ===== */
        .bg-soft-primary { background-color: var(--primary-light); }
        .bg-soft-accent { background-color: var(--accent-light); }
        .text-primary-custom { color: var(--primary); }
        .text-accent-custom { color: var(--accent); }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .rounded-full { border-radius: 50px; }
        .fw-700 { font-weight: 700; }
        .fw-600 { font-weight: 600; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #A29BFE;
            --secondary: #00CEC9;
            --secondary-dark: #00B5B0;
            --accent: #FD79A8;
            --background: #F8F9FE;
            --surface: #FFFFFF;
            --text: #2D3436;
            --text-light: #636E72;
            --text-muted: #B2BEC3;
            --border: #E2E8F0;
            --border-light: #F0F2F5;
            --shadow-sm: 0 2px 8px rgba(108,92,231,0.06);
            --shadow-md: 0 8px 30px rgba(108,92,231,0.10);
            --shadow-lg: 0 20px 60px rgba(108,92,231,0.12);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after { box-sizing: border-box; margin: 0; padding: 0; }

        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

        body {
            font-family: var(--font-sans);
            background: var(--background);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }

        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }

        /* ===== Container ===== */
        .container { max-width: 1200px; padding: 0 24px; margin: 0 auto; width: 100%; }

        /* ===== Header / Nav (SaaS Command-Bar Style) ===== */
        .site-header {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 0;
            height: 72px;
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }
        .logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            letter-spacing: -0.3px;
            margin-right: 8px;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover { color: var(--text); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }
        .nav-links a {
            color: var(--text-light);
            font-weight: 500;
            font-size: 0.9rem;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(108,92,231,0.06);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(108,92,231,0.10);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--border-light);
            border-radius: 40px;
            padding: 0 16px;
            gap: 8px;
            border: 1px solid transparent;
            transition: var(--transition);
            min-width: 160px;
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            background: var(--surface);
            box-shadow: 0 0 0 4px rgba(108,92,231,0.08);
        }
        .nav-search i { color: var(--text-muted); font-size: 0.9rem; }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 10px 0;
            font-size: 0.85rem;
            color: var(--text);
            outline: none;
            width: 100%;
            min-width: 80px;
        }
        .nav-search input::placeholder { color: var(--text-muted); }

        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 10px 24px;
            border-radius: 40px;
            border: none;
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(108,92,231,0.25);
        }
        .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108,92,231,0.35);
            color: #fff;
        }
        .btn-secondary-custom {
            background: var(--surface);
            color: var(--primary);
            border: 1px solid var(--border);
        }
        .btn-secondary-custom:hover {
            background: var(--border-light);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn-lg { padding: 14px 36px; font-size: 1.05rem; }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover { background: var(--border-light); }

        /* ===== Mobile Nav ===== */
        @media (max-width: 1024px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 1040;
                align-items: stretch;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .nav-links a.active::after { display: none; }
            .nav-links a.active { background: rgba(108,92,231,0.10); }
            .nav-toggle { display: block; }
            .nav-search { min-width: 120px; }
            .nav-search input { min-width: 60px; }
        }
        @media (max-width: 768px) {
            .site-header { height: 64px; }
            .nav-links { top: 64px; }
            .logo { font-size: 1.2rem; }
            .logo i { font-size: 1.3rem; }
            .nav-search { min-width: 80px; padding: 0 12px; }
            .nav-search input { padding: 8px 0; font-size: 0.8rem; min-width: 50px; }
            .btn-custom.btn-sm { padding: 6px 14px; font-size: 0.78rem; gap: 4px; }
            .nav-right .btn-custom { display: none; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .logo { font-size: 1.05rem; gap: 6px; }
            .logo i { font-size: 1.1rem; }
            .nav-search { min-width: 60px; padding: 0 10px; }
            .nav-search input { width: 50px; }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, #F0EEFF 0%, #E8F8F7 100%);
            padding: 60px 0 40px;
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(108,92,231,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 1; }
        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            align-items: center;
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 8px;
        }
        .article-meta .badge {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 4px 14px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.8rem;
        }
        .article-meta i { margin-right: 4px; color: var(--text-muted); }
        .article-meta span { display: inline-flex; align-items: center; gap: 4px; }

        @media (max-width: 768px) {
            .article-hero { padding: 40px 0 28px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-meta { font-size: 0.8rem; gap: 8px 16px; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.3rem; }
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-body {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 32px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-top: 40px;
            margin-bottom: 16px;
            color: var(--text);
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--text);
        }
        .article-body p {
            margin-bottom: 20px;
            color: var(--text);
            line-height: 1.8;
            font-size: 1.05rem;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 24px;
            padding-left: 24px;
            color: var(--text);
        }
        .article-body li { margin-bottom: 8px; line-height: 1.7; }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 32px 0;
            background: rgba(108,92,231,0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body pre {
            background: #1e1e2e;
            color: #cdd6f4;
            padding: 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            font-size: 0.9rem;
            margin: 32px 0;
        }
        .article-body code {
            background: rgba(108,92,231,0.08);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }
        .article-body pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }
        .article-body a { font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }

        @media (max-width: 768px) {
            .article-body { padding: 28px 20px; }
            .article-body h2 { font-size: 1.3rem; }
            .article-body h3 { font-size: 1.1rem; }
            .article-body p { font-size: 0.98rem; }
        }
        @media (max-width: 520px) {
            .article-body { padding: 20px 16px; border-radius: var(--radius-md); }
            .article-body h2 { font-size: 1.15rem; }
            .article-body p { font-size: 0.92rem; }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--primary-light);
            margin-bottom: 24px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

        /* ===== Related / CTA / FAQ ===== */
        .related-section {
            padding: 56px 0;
            background: var(--surface);
            border-top: 1px solid var(--border-light);
        }
        .related-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--background);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .related-card .badge {
            background: rgba(108,92,231,0.10);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .related-card h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin: 12px 0 8px;
            line-height: 1.4;
        }
        .related-card h5 a { color: var(--text); }
        .related-card h5 a:hover { color: var(--primary); }
        .related-card p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .related-card .meta-info {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
        }
        @media (max-width: 992px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 576px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-section h2 { font-size: 1.3rem; }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 64px 0;
            background: linear-gradient(135deg, var(--primary), #8B7CF7);
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-custom {
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            padding: 14px 40px;
            border-radius: 40px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.15);
        }
        .cta-section .btn-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0,0,0,0.20);
            color: var(--primary-dark);
        }
        @media (max-width: 768px) {
            .cta-section { padding: 48px 0; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.98rem; }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 56px 0;
            background: var(--background);
        }
        .faq-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 20px 24px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow-sm); }
        .faq-question {
            font-weight: 600;
            font-size: 1.02rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
        }
        .faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.9rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-top: 12px;
        }
        @media (max-width: 768px) {
            .faq-section h2 { font-size: 1.3rem; }
            .faq-item { padding: 16px 18px; }
            .faq-question { font-size: 0.95rem; }
        }

        /* ===== Site Footer ===== */
        .site-footer {
            background: #1a1a2e;
            color: rgba(255,255,255,0.75);
            padding: 56px 0 0;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .logo-footer {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 320px;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .site-footer ul { list-style: none; padding: 0; margin: 0; }
        .site-footer ul li { margin-bottom: 10px; }
        .site-footer ul a {
            color: rgba(255,255,255,0.6);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .site-footer ul a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-bottom p { font-size: 0.82rem; color: rgba(255,255,255,0.5); margin: 0; }
        .social-links { display: flex; gap: 16px; }
        .social-links a {
            color: rgba(255,255,255,0.5);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .social-links a:hover { color: var(--primary-light); transform: scale(1.15); }
        @media (max-width: 992px) {
            .site-footer .container { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 576px) {
            .site-footer .container { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer-brand p { max-width: 100%; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 16px; }
        .mb-2 { margin-bottom: 16px; }
        .gap-2 { gap: 12px; }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: var(--transition);
            z-index: 1050;
            border: none;
            cursor: pointer;
        }
        .back-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --primary-gradient: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
            --secondary: #fd79a8;
            --secondary-light: #fab1c8;
            --accent: #00cec9;
            --accent-dark: #00b3b0;
            --bg-light: #f8f9fe;
            --bg-white: #ffffff;
            --bg-dark: #2d2b55;
            --bg-card: #ffffff;
            --text-primary: #2d2b55;
            --text-secondary: #6c6a8a;
            --text-muted: #9b9ab7;
            --text-white: #ffffff;
            --border-light: #e8e7f0;
            --border-focus: #6c5ce7;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
            --shadow-md: 0 8px 30px rgba(108, 92, 231, 0.12);
            --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.18);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1240px;
        }

        /* ===== Base Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
        }
        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);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            transition: var(--transition);
        }
        button:focus-visible,
        input:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            padding: 0 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(8px);
            height: 70px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            gap: 16px;
            height: 100%;
        }
        .site-header .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .site-header .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .site-header .logo:hover {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1 1 auto;
            justify-content: center;
            flex-wrap: nowrap;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.06);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.1);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            flex: 0 1 200px;
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 8px 0;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 100%;
            min-width: 100px;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
            text-align: center;
            justify-content: center;
        }
        .btn-primary-custom {
            background: var(--primary-gradient);
            color: var(--text-white) !important;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
        }
        .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.4);
            color: var(--text-white) !important;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: var(--text-white) !important;
            transform: translateY(-2px);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 4px;
            }
            .nav-links a {
                padding: 6px 12px;
                font-size: 0.85rem;
            }
            .nav-search {
                flex: 0 1 140px;
            }
        }
        @media (max-width: 820px) {
            .site-header {
                height: 64px;
            }
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 2px solid var(--border-light);
                z-index: 1040;
                align-items: stretch;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
                text-align: center;
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-links a.active {
                background: rgba(108, 92, 231, 0.12);
            }
            .nav-right .nav-search {
                display: none;
            }
            .nav-right .btn-custom {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .mobile-search-show .nav-search {
                display: flex !important;
                flex: 1 1 auto;
            }
        }
        @media (max-width: 520px) {
            .site-header .logo {
                font-size: 1.2rem;
            }
            .site-header .logo i {
                font-size: 1.3rem;
            }
            .site-header .container {
                padding: 0 16px;
                gap: 8px;
            }
            .nav-links {
                top: 60px;
                padding: 16px;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0 70px;
            text-align: center;
            position: relative;
            isolation: isolate;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(45, 43, 85, 0.85) 0%, rgba(108, 92, 231, 0.7) 100%);
            z-index: 0;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            padding: 6px 20px;
            border-radius: 40px;
            color: var(--text-white);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 60px 0 50px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero p {
                font-size: 0.95rem;
            }
        }

        /* ===== Section Spacing ===== */
        .section-padding {
            padding: 72px 0;
        }
        .section-padding-sm {
            padding: 48px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 40px;
            text-align: center;
        }
        .text-center {
            text-align: center;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 28px;
            }
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .card-custom .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .card-custom .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .card-custom .card-text {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
            flex: 1;
        }
        .card-tag {
            display: inline-block;
            background: rgba(108, 92, 231, 0.1);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .card-link {
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
        }
        .card-link i {
            transition: var(--transition);
        }
        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Steps / Timeline ===== */
        .step-item {
            display: flex;
            gap: 20px;
            padding: 24px 0;
            border-bottom: 1px solid var(--border-light);
            align-items: flex-start;
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: var(--primary-gradient);
            color: var(--text-white);
            font-size: 1.2rem;
            font-weight: 800;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 14px rgba(108, 92, 231, 0.25);
        }
        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        @media (max-width: 520px) {
            .step-item {
                flex-direction: column;
                gap: 12px;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            transition: var(--transition);
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            position: relative;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(45, 43, 85, 0.88) 0%, rgba(108, 92, 231, 0.75) 100%);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-custom {
            font-size: 1.05rem;
            padding: 14px 36px;
            background: var(--text-white);
            color: var(--primary) !important;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
        }
        .cta-section .btn-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(0, 0, 0, 0.3);
            background: var(--bg-light);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .site-footer .footer-brand .logo-footer {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-footer .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
        }
        .site-footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .site-footer ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 24px 0 30px;
            margin-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .social-links {
            display: flex;
            gap: 16px;
        }
        .social-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 1.3rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--primary-light);
            transform: scale(1.15);
        }
        @media (max-width: 820px) {
            .site-footer .container {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .site-footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 40px 0 0;
            }
        }

        /* ===== Utility ===== */
        .bg-white {
            background: var(--bg-white);
        }
        .bg-light-alt {
            background: var(--bg-light);
        }
        .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: 24px;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
        }

        .mt-2 {
            margin-top: 20px;
        }
        .mb-2 {
            margin-bottom: 20px;
        }
        .gap-3 {
            gap: 16px;
        }

        /* ===== Resources List ===== */
        .resource-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            align-items: center;
        }
        .resource-item:last-child {
            border-bottom: none;
        }
        .resource-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            background: rgba(108, 92, 231, 0.1);
            color: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }
        .resource-info {
            flex: 1;
        }
        .resource-info h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .resource-info span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== Stats ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 16px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-number {
                font-size: 1.6rem;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-nav {
            padding: 14px 0 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb-nav a {
            color: var(--text-muted);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
        }
        .breadcrumb-nav span {
            color: var(--text-secondary);
        }

        /* Print */
        @media print {
            .site-header,
            .site-footer,
            .cta-section,
            .nav-toggle {
                display: none !important;
            }
            .page-hero {
                padding: 20px 0;
                background: #f8f9fe !important;
            }
            .page-hero h1 {
                color: #2d2b55;
            }
            .page-hero p {
                color: #6c6a8a;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --primary-bg: #f0eeff;
            --secondary: #fd79a8;
            --secondary-light: #ffe8f0;
            --accent: #00cec9;
            --accent-light: #e0fafa;
            --bg-white: #ffffff;
            --bg-light: #f8f9fe;
            --bg-dark: #2d3436;
            --text-dark: #2d3436;
            --text-body: #4a5568;
            --text-muted: #8899a6;
            --text-white: #ffffff;
            --border-light: #e8ecf4;
            --border-focus: #6c5ce7;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
            --shadow-md: 0 8px 30px rgba(108, 92, 231, 0.12);
            --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.15);
            --shadow-hover: 0 16px 48px rgba(108, 92, 231, 0.20);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: var(--bg-white);
            line-height: 1.7;
            font-size: 1rem;
            padding-top: var(--header-height);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1050;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-header .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.35rem;
            color: var(--text-dark);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .site-header .logo i {
            color: var(--primary);
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .site-header .logo:hover i {
            transform: rotate(-10deg) scale(1.05);
        }
        .site-header .logo:hover {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
            margin: 0 20px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-links a.active {
            color: var(--text-white);
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.30);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
            color: var(--text-white);
        }

        .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: 40px;
            padding: 0 16px;
            border: 1px solid transparent;
            transition: var(--transition);
            min-width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--border-focus);
            background: var(--bg-white);
            box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.10);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 0;
            font-size: 0.85rem;
            color: var(--text-dark);
            width: 100%;
            outline: none;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            border-radius: 40px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-custom:hover {
            transform: translateY(-2px);
            text-decoration: none;
        }
        .btn-primary-custom {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.25);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: var(--text-white);
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.35);
        }
        .btn-sm {
            padding: 8px 22px;
            font-size: 0.85rem;
        }
        .btn-lg-custom {
            padding: 14px 36px;
            font-size: 1.05rem;
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: var(--text-white);
        }
        .btn-white-custom {
            background: var(--bg-white);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .btn-white-custom:hover {
            background: var(--bg-white);
            color: var(--primary-dark);
            box-shadow: var(--shadow-md);
        }
        .btn-accent-custom {
            background: var(--accent);
            color: var(--text-dark);
            box-shadow: 0 4px 16px rgba(0, 206, 201, 0.25);
        }
        .btn-accent-custom:hover {
            background: #00b8b3;
            color: var(--text-dark);
            box-shadow: 0 8px 28px rgba(0, 206, 201, 0.35);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 992px) {
            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                margin: 0;
                z-index: 1040;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                padding: 12px 20px;
                width: 100%;
                text-align: center;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .nav-links a.active {
                background: var(--primary);
                color: var(--text-white);
            }
            .nav-search {
                min-width: 140px;
            }
            .nav-search input {
                width: 80px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-right .btn-custom.btn-sm {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 576px) {
            .nav-search {
                min-width: 36px;
                padding: 0 10px;
                background: transparent;
                border: none;
            }
            .nav-search input {
                display: none;
            }
            .nav-search i {
                font-size: 1.1rem;
                color: var(--text-dark);
                margin-right: 0;
            }
            .nav-right .btn-custom.btn-sm {
                padding: 6px 14px;
                font-size: 0.75rem;
                gap: 4px;
            }
            .nav-right .btn-custom.btn-sm i {
                display: none;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            background: linear-gradient(135deg, var(--primary) 0%, #4834d4 60%, #6c5ce7 100%);
            padding: 80px 0 100px;
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--bg-white);
            clip-path: ellipse(70% 100% at 50% 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            padding: 6px 20px;
            border-radius: 40px;
            color: var(--text-white);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.20);
        }
        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -1px;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .page-hero .hero-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 60px 0 80px;
                min-height: 280px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero::after {
                height: 50px;
                clip-path: ellipse(80% 100% at 50% 100%);
            }
        }
        @media (max-width: 576px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero p {
                font-size: 0.9rem;
            }
            .page-hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .page-hero .hero-actions .btn-custom {
                width: 100%;
                max-width: 260px;
                justify-content: center;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-light);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0 auto 24px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .section-label i {
            font-size: 0.75rem;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-dark .section-title {
            color: var(--text-white);
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.70);
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
        }

        /* ===== 功能卡片 ===== */
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--primary);
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--text-white);
            margin-bottom: 18px;
            background: var(--primary);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .feature-card .feature-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            margin-top: 14px;
        }

        /* 带图片的功能卡片 */
        .feature-card-image {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
            overflow: hidden;
        }
        .feature-card-image:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card-image .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .feature-card-image .card-body {
            padding: 24px 24px 28px;
        }
        .feature-card-image .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .feature-card-image .card-body p {
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .feature-card-image .card-body .badge-custom {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            margin-top: 12px;
        }

        /* ===== 统计数字 ===== */
        .stat-item {
            text-align: center;
            padding: 24px 16px;
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -1px;
            line-height: 1.1;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .section-dark .stat-item .stat-number {
            color: var(--accent);
        }
        .section-dark .stat-item .stat-label {
            color: rgba(255, 255, 255, 0.70);
        }

        /* ===== 流程步骤 ===== */
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 24px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            margin-bottom: 16px;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .step-item .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-white);
            background: var(--primary);
        }
        .step-item .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 4px;
        }
        .step-item .step-content p {
            font-size: 0.9rem;
            color: var(--text-body);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            padding: 20px 24px;
            margin-bottom: 12px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--text-dark);
            font-size: 1rem;
            gap: 12px;
        }
        .faq-item .faq-q i {
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item .faq-a {
            margin-top: 12px;
            color: var(--text-body);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }
        .faq-item.open .faq-a {
            display: block;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .section-dark .faq-item {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.10);
        }
        .section-dark .faq-item .faq-q {
            color: var(--text-white);
        }
        .section-dark .faq-item .faq-a {
            color: rgba(255, 255, 255, 0.75);
            border-top-color: rgba(255, 255, 255, 0.10);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #4834d4 60%, #6c5ce7 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .cta-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .cta-actions .btn-custom {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 64px 0 0;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .site-footer .footer-brand .logo-footer {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.7;
            max-width: 320px;
        }
        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .site-footer ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0 32px;
            margin-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer .footer-bottom p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
            margin: 0;
        }
        .site-footer .social-links {
            display: flex;
            gap: 14px;
        }
        .site-footer .social-links a {
            color: rgba(255, 255, 255, 0.45);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .site-footer .social-links a:hover {
            color: var(--primary-light);
            transform: scale(1.15);
        }

        @media (max-width: 992px) {
            .site-footer .container {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 576px) {
            .site-footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            background: var(--bg-light);
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-bar .breadcrumb {
            margin: 0;
            background: transparent;
            padding: 0;
            font-size: 0.85rem;
        }
        .breadcrumb-bar .breadcrumb-item a {
            color: var(--text-muted);
        }
        .breadcrumb-bar .breadcrumb-item a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .breadcrumb-item.active {
            color: var(--text-dark);
            font-weight: 500;
        }
        .breadcrumb-bar .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-muted);
            content: '·';
        }

        /* ===== 辅助 ===== */
        .text-primary-custom {
            color: var(--primary);
        }
        .bg-primary-soft {
            background: var(--primary-bg);
        }
        .rounded-custom {
            border-radius: var(--radius-md);
        }
        .shadow-custom {
            box-shadow: var(--shadow-sm);
        }
        .gap-custom {
            gap: 24px;
        }
        .mt-section {
            margin-top: 80px;
        }
        @media (max-width: 768px) {
            .mt-section {
                margin-top: 48px;
            }
        }

        /* ===== 功能详情页特定 ===== */
        .feature-detail-icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--text-white);
            background: var(--primary);
            margin-bottom: 16px;
            flex-shrink: 0;
        }
        .feature-detail-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .feature-detail-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .feature-detail-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .feature-detail-card p {
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.7;
            flex: 1;
        }
        .feature-detail-card .feature-meta {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 16px;
        }
        .feature-detail-card .feature-meta span {
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
        }
        .feature-detail-card .feature-meta span.green {
            background: var(--accent-light);
            color: #00b8b3;
        }
        .feature-detail-card .feature-meta span.pink {
            background: var(--secondary-light);
            color: #e84393;
        }

        /* ===== 功能对比表 ===== */
        .compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .compare-table th {
            background: var(--primary);
            color: var(--text-white);
            padding: 16px 20px;
            font-weight: 600;
            font-size: 0.9rem;
            text-align: center;
        }
        .compare-table th:first-child {
            text-align: left;
        }
        .compare-table td {
            padding: 14px 20px;
            font-size: 0.88rem;
            color: var(--text-body);
            border-bottom: 1px solid var(--border-light);
            text-align: center;
            vertical-align: middle;
        }
        .compare-table td:first-child {
            text-align: left;
            font-weight: 500;
            color: var(--text-dark);
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table tr:hover td {
            background: var(--primary-bg);
        }
        .compare-table .check {
            color: var(--accent);
            font-size: 1.1rem;
        }
        .compare-table .cross {
            color: #e17055;
            font-size: 1.1rem;
        }
        @media (max-width: 768px) {
            .compare-table {
                font-size: 0.8rem;
            }
            .compare-table th,
            .compare-table td {
                padding: 10px 12px;
            }
        }

        /* ===== Bootstrap 覆盖 ===== */
        .btn {
            border-radius: 40px;
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.35);
            transform: translateY(-2px);
        }
        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline-primary:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: var(--text-white);
        }
        .card {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
        }
        .badge {
            border-radius: 40px;
            font-weight: 500;
            padding: 4px 12px;
        }
        .badge-primary {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .form-control:focus {
            border-color: var(--border-focus);
            box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.10);
        }

        /* ===== 图片装饰 ===== */
        .img-decorated {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            transition: var(--transition);
        }
        .img-decorated:hover {
            box-shadow: var(--shadow-hover);
        }

        /* ===== 标签组 ===== */
        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-group .tag {
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--text-body);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .tag-group .tag:hover {
            background: var(--primary-bg);
            color: var(--primary);
            border-color: var(--primary-light);
        }

        /* ===== 实用间距 ===== */
        .mb-40 {
            margin-bottom: 40px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .py-40 {
            padding-top: 40px;
            padding-bottom: 40px;
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --primary-bg: #f0eeff;
            --secondary: #fd79a8;
            --accent: #00cec9;
            --accent-dark: #00b5b0;
            --bg-body: #ffffff;
            --bg-alt: #f8f7fc;
            --bg-card: #ffffff;
            --bg-dark: #2d2b55;
            --text-dark: #1a1a2e;
            --text-main: #2d2d44;
            --text-muted: #6c6b80;
            --text-light: #f8f7fc;
            --border-light: #e8e6f0;
            --border-card: #eceaf5;
            --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
            --shadow-md: 0 8px 30px rgba(108, 92, 231, 0.12);
            --shadow-lg: 0 20px 60px rgba(108, 92, 231, 0.18);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-base: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --nav-height: 72px;
            --max-width: 1200px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-base);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--nav-height);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
        }
        ul {
            padding-left: 0;
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .logo:hover {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            flex: 1;
            justify-content: center;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-links a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-links a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-alt);
            border-radius: 100px;
            padding: 6px 16px;
            border: 1px solid transparent;
            transition: var(--transition);
            min-width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            font-size: 0.85rem;
            color: var(--text-main);
            padding: 2px 0;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-custom:hover {
            transform: translateY(-1px);
            text-decoration: none;
        }
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(108, 92, 231, 0.35);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 8px 24px rgba(108, 92, 231, 0.45);
        }
        .btn-secondary-custom {
            background: var(--bg-alt);
            color: var(--text-dark);
            border: 1px solid var(--border-light);
        }
        .btn-secondary-custom:hover {
            background: var(--border-light);
            color: var(--text-dark);
        }
        .btn-sm {
            padding: 6px 18px;
            font-size: 0.82rem;
        }
        .btn-lg-custom {
            padding: 14px 36px;
            font-size: 1.05rem;
            border-radius: 100px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-alt);
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 992px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-light);
                max-height: 70vh;
                overflow-y: auto;
                align-items: stretch;
                z-index: 1040;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-links a {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-search {
                min-width: 120px;
                flex: 1;
                max-width: 200px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-right .btn-custom {
                display: none;
            }
            .nav-right .btn-custom.btn-sm {
                display: inline-flex;
            }
        }
        @media (max-width: 576px) {
            .nav-search {
                min-width: 80px;
                padding: 4px 12px;
            }
            .nav-search input {
                font-size: 0.78rem;
            }
            .logo {
                font-size: 1.15rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
            .nav-right .btn-custom.btn-sm {
                padding: 4px 14px;
                font-size: 0.75rem;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 100px 0 80px;
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, #2d2b55 0%, #1a1a2e 100%), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-light);
            text-align: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26, 26, 46, 0.6);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-section h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }
        .hero-section h1 span {
            color: var(--primary-light);
        }
        .hero-section p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 700px;
            margin: 0 auto 32px;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 32px;
        }
        .hero-badges .badge {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            color: #fff;
            padding: 8px 20px;
            border-radius: 100px;
            font-weight: 500;
            font-size: 0.85rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-badges .badge i {
            margin-right: 6px;
            color: var(--primary-light);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .hero-actions .btn-custom {
            font-size: 1rem;
            padding: 14px 32px;
        }
        .hero-actions .btn-outline-light-custom {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
        }
        .hero-actions .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0 50px;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section p {
                font-size: 1rem;
            }
            .hero-badges .badge {
                font-size: 0.78rem;
                padding: 6px 16px;
            }
        }
        @media (max-width: 576px) {
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .hero-section p {
                font-size: 0.9rem;
            }
            .hero-actions .btn-custom {
                font-size: 0.85rem;
                padding: 10px 24px;
            }
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-padding-sm {
            padding: 50px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .title-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.8rem;
            padding: 4px 16px;
            border-radius: 100px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 50px 0;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
            .section-title p {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 576px) {
            .section-padding {
                padding: 36px 0;
            }
            .section-title h2 {
                font-size: 1.35rem;
            }
        }

        /* ===== 背景交替 ===== */
        .bg-alt {
            background: var(--bg-alt);
        }
        .bg-primary-light {
            background: var(--primary-bg);
        }
        .bg-dark-section {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .bg-dark-section .section-title h2 {
            color: #fff;
        }
        .bg-dark-section .section-title p {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .card-custom .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .card-custom h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .card-custom p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        .card-custom .badge-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.75rem;
            padding: 2px 12px;
            border-radius: 100px;
            margin-top: 12px;
        }

        /* ===== 功能概览卡片 ===== */
        .feature-grid .card-custom {
            text-align: center;
            padding: 36px 24px;
        }
        .feature-grid .card-custom .card-icon {
            margin: 0 auto 16px;
        }
        .feature-grid .card-custom h3 {
            font-size: 1.15rem;
        }

        /* ===== 功能详解卡片（带图） ===== */
        .feature-detail-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .feature-detail-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .feature-detail-card .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .feature-detail-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .feature-detail-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-detail-card .card-body p {
            color: var(--text-muted);
            font-size: 0.92rem;
            flex: 1;
            margin-bottom: 12px;
        }
        .feature-detail-card .card-body .feature-link {
            font-weight: 600;
            color: var(--primary);
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .feature-detail-card .card-body .feature-link:hover {
            gap: 10px;
        }

        /* ===== 数据统计 ===== */
        .stat-item {
            text-align: center;
            padding: 24px 16px;
        }
        .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-muted);
            font-weight: 500;
        }
        .bg-dark-section .stat-item .stat-number {
            color: var(--primary-light);
        }
        .bg-dark-section .stat-item .stat-label {
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 768px) {
            .stat-item .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== 流程步骤 ===== */
        .step-item {
            text-align: center;
            padding: 24px 16px;
            position: relative;
        }
        .step-item .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-item p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 768px) {
            .step-connector {
                display: flex;
                align-items: center;
                justify-content: center;
                font-size: 1.5rem;
                color: var(--primary-light);
                padding: 0 8px;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 12px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            gap: 12px;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 12px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, #2d2b55 0%, #1a1a2e 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26, 26, 46, 0.55);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-custom {
            font-size: 1.05rem;
            padding: 16px 36px;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 50px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .site-footer p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
        }
        .site-footer ul {
            padding: 0;
            margin: 0;
            list-style: none;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .site-footer ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .logo-footer {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-bottom {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-bottom p {
            margin: 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .social-links {
            display: flex;
            gap: 16px;
        }
        .social-links a {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--primary-light);
            transform: translateY(-2px);
        }
        @media (max-width: 992px) {
            .site-footer .container {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 576px) {
            .site-footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 工具类 ===== */
        .text-primary-custom {
            color: var(--primary);
        }
        .text-muted-custom {
            color: var(--text-muted);
        }
        .bg-gradient-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }
        .rounded-xl {
            border-radius: var(--radius-xl);
        }
        .shadow-custom-md {
            box-shadow: var(--shadow-md);
        }
        .mb-section {
            margin-bottom: 60px;
        }

        /* ===== 响应式间距 ===== */
        @media (max-width: 768px) {
            .mb-section {
                margin-bottom: 36px;
            }
        }

        /* ===== 分类页面特有 ===== */
        .page-banner {
            position: relative;
            padding: 60px 0 50px;
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, #2d2b55 0%, #1a1a2e 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            text-align: center;
            color: #fff;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26, 26, 46, 0.55);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }
        .page-banner p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto;
        }
        .page-banner .breadcrumb-custom {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 16px;
        }
        .page-banner .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb-custom a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb-custom span {
            color: rgba(255, 255, 255, 0.4);
        }
        @media (max-width: 768px) {
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner p {
                font-size: 0.92rem;
            }
        }
        @media (max-width: 576px) {
            .page-banner {
                padding: 40px 0 30px;
            }
            .page-banner h1 {
                font-size: 1.35rem;
            }
        }

        /* ===== 功能标签 ===== */
        .func-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
        }
        .func-tags .tag {
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 100px;
        }

        /* ===== 功能列表 ===== */
        .func-list-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            align-items: flex-start;
        }
        .func-list-item:last-child {
            border-bottom: none;
        }
        .func-list-item .list-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .func-list-item .list-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .func-list-item .list-content p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }