/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --primary-dark: #000051;
            --accent: #ff6f00;
            --accent-light: #ffa040;
            --accent-dark: #c43e00;
            --bg: #f5f7fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --text-white: #ffffff;
            --border: #e8ecf4;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(26, 35, 126, 0.08);
            --shadow-lg: 0 12px 48px rgba(26, 35, 126, 0.12);
            --shadow-hover: 0 20px 60px rgba(26, 35, 126, 0.16);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; transition: var(--transition); }
        button { cursor: pointer; background: none; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: 80px 0; }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-dark);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-light);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(255, 111, 0, 0.12);
            color: var(--accent-dark);
            letter-spacing: 0.3px;
        }
        .badge-primary {
            background: rgba(26, 35, 126, 0.10);
            color: var(--primary);
        }
        .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            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);
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo i { color: var(--accent); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; }
        .nav { display: flex; align-items: center; gap: 8px; }
        .nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover { color: var(--primary); background: rgba(26, 35, 126, 0.06); }
        .nav a.active { color: var(--text-white); background: var(--primary); }
        .nav a.active:hover { background: var(--primary-dark); }
        .header-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 50px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(26, 35, 126, 0.08); }
        .search-box input {
            background: transparent;
            padding: 8px 10px;
            font-size: 0.9rem;
            color: var(--text);
            width: 140px;
        }
        .search-box input::placeholder { color: var(--text-light); }
        .search-box i { color: var(--text-light); font-size: 0.9rem; }
        .btn-cta {
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--text-white);
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(255, 111, 0, 0.30);
            white-space: nowrap;
        }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255, 111, 0, 0.40); color: var(--text-white); }
        .btn-cta:active { transform: translateY(0); }
        .hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
        .hamburger span { width: 26px; height: 2.5px; background: var(--text); border-radius: 4px; transition: var(--transition); }

        /* ===== Mobile Nav ===== */
        .mobile-nav { display: none; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
            background: linear-gradient(135deg, rgba(26, 35, 126, 0.88), rgba(0, 0, 81, 0.92)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg), transparent);
        }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 820px; }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.15);
            color: var(--text-white);
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero-title {
            font-size: 3.6rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.20);
        }
        .hero-title span { background: linear-gradient(135deg, var(--accent-light), #ffb74d); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero-desc {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .btn-primary {
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--text-white);
            transition: var(--transition);
            box-shadow: 0 8px 32px rgba(255, 111, 0, 0.35);
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 44px rgba(255, 111, 0, 0.45); color: var(--text-white); }
        .btn-outline-light {
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            border: 2px solid rgba(255, 255, 255, 0.40);
            color: var(--text-white);
            background: transparent;
            transition: var(--transition);
        }
        .btn-outline-light:hover { background: rgba(255, 255, 255, 0.12); border-color: var(--text-white); color: var(--text-white); transform: translateY(-3px); }
        .hero-stats { display: flex; justify-content: center; gap: 48px; margin-top: 56px; flex-wrap: wrap; }
        .hero-stat { text-align: center; }
        .hero-stat-num { font-size: 2.4rem; font-weight: 800; color: var(--text-white); line-height: 1.2; }
        .hero-stat-num i { font-size: 1.6rem; color: var(--accent-light); margin-right: 6px; }
        .hero-stat-label { font-size: 0.9rem; color: rgba(255, 255, 255, 0.65); margin-top: 4px; }

        /* ===== Features ===== */
        .features { background: var(--bg-white); }
        .features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--text-white);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .feature-card:nth-child(2) .feature-icon { background: linear-gradient(135deg, var(--accent), var(--accent-light)); }
        .feature-card:nth-child(3) .feature-icon { background: linear-gradient(135deg, #00897b, #26a69a); }
        .feature-card:nth-child(4) .feature-icon { background: linear-gradient(135deg, #6a1b9a, #ab47bc); }
        .feature-title { font-size: 1.15rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 10px; }
        .feature-desc { font-size: 0.95rem; color: var(--text-light); line-height: 1.6; }

        /* ===== Categories ===== */
        .categories { background: var(--bg); }
        .categories-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-white);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .category-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .category-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
        }
        .category-body { padding: 28px 30px; flex: 1; display: flex; flex-direction: column; }
        .category-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(26, 35, 126, 0.08);
            color: var(--primary);
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .category-title { font-size: 1.4rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 10px; }
        .category-desc { font-size: 0.95rem; color: var(--text-light); line-height: 1.6; margin-bottom: 20px; flex: 1; }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--accent);
            font-size: 0.95rem;
        }
        .category-link i { transition: var(--transition); }
        .category-link:hover i { transform: translateX(4px); }

        /* ===== Latest Posts (CMS) ===== */
        .latest-posts { background: var(--bg-white); }
        .posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .post-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .post-cat {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            backdrop-filter: blur(8px);
        }
        .post-body { padding: 24px 26px; flex: 1; display: flex; flex-direction: column; }
        .post-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-light); margin-bottom: 10px; }
        .post-meta i { margin-right: 4px; }
        .post-title { font-size: 1.1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 10px; line-height: 1.4; }
        .post-title a { color: inherit; }
        .post-title a:hover { color: var(--primary); }
        .post-excerpt { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; flex: 1; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
        .post-readmore {
            font-weight: 600;
            color: var(--accent);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .post-readmore i { transition: var(--transition); }
        .post-readmore:hover i { transform: translateX(4px); }
        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            font-size: 1.05rem;
            background: var(--bg);
            border-radius: var(--radius);
        }
        .posts-empty i { font-size: 2.4rem; color: var(--border); margin-bottom: 16px; display: block; }

        /* ===== Stats / Data ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            padding: 80px 0;
        }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
        .stat-item { text-align: center; color: var(--text-white); }
        .stat-icon { font-size: 2.2rem; margin-bottom: 12px; color: var(--accent-light); }
        .stat-number { font-size: 2.8rem; font-weight: 800; line-height: 1.2; margin-bottom: 6px; }
        .stat-label { font-size: 0.95rem; color: rgba(255, 255, 255, 0.70); }

        /* ===== How It Works ===== */
        .how-it-works { background: var(--bg); }
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            opacity: 0.25;
        }
        .step-card { text-align: center; position: relative; z-index: 1; }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-white);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            box-shadow: 0 8px 24px rgba(26, 35, 126, 0.20);
        }
        .step-card:nth-child(2) .step-num { background: linear-gradient(135deg, var(--accent), var(--accent-light)); }
        .step-card:nth-child(3) .step-num { background: linear-gradient(135deg, #00897b, #26a69a); }
        .step-card:nth-child(4) .step-num { background: linear-gradient(135deg, #6a1b9a, #ab47bc); }
        .step-title { font-size: 1.1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
        .step-desc { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; max-width: 220px; margin: 0 auto; }

        /* ===== FAQ ===== */
        .faq-section { background: var(--bg-white); }
        .faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 26px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            background: var(--bg);
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question i { color: var(--primary); font-size: 1.1rem; transition: var(--transition); flex-shrink: 0; }
        .faq-item.active .faq-question { background: rgba(26, 35, 126, 0.04); }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
        .faq-answer {
            padding: 0 26px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.4s ease;
            color: var(--text-light);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.active .faq-answer { padding: 20px 26px; max-height: 300px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            background-blend-mode: overlay;
            padding: 100px 0;
            text-align: center;
        }
        .cta-title { font-size: 2.4rem; font-weight: 800; color: var(--text-white); margin-bottom: 16px; }
        .cta-desc { font-size: 1.1rem; color: rgba(255, 255, 255, 0.80); max-width: 560px; margin: 0 auto 36px; }
        .cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .btn-cta-large {
            padding: 16px 48px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--text-white);
            transition: var(--transition);
            box-shadow: 0 8px 32px rgba(255, 111, 0, 0.35);
        }
        .btn-cta-large:hover { transform: translateY(-3px); box-shadow: 0 12px 44px rgba(255, 111, 0, 0.45); color: var(--text-white); }
        .btn-outline-cta {
            padding: 16px 48px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.1rem;
            border: 2px solid rgba(255, 255, 255, 0.35);
            color: var(--text-white);
            background: transparent;
            transition: var(--transition);
        }
        .btn-outline-cta:hover { background: rgba(255, 255, 255, 0.12); border-color: var(--text-white); color: var(--text-white); transform: translateY(-3px); }

        /* ===== Footer ===== */
        .footer {
            background: #0d0d1a;
            color: rgba(255, 255, 255, 0.70);
            padding: 60px 0 0;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
        .footer-brand .logo { color: var(--text-white); margin-bottom: 16px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand .logo span { -webkit-text-fill-color: var(--text-white); background: none; }
        .footer-desc { font-size: 0.9rem; line-height: 1.7; max-width: 320px; color: rgba(255, 255, 255, 0.55); }
        .footer-social { display: flex; gap: 12px; margin-top: 20px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.60);
            transition: var(--transition);
            font-size: 1rem;
        }
        .footer-social a:hover { background: var(--accent); color: var(--text-white); transform: translateY(-3px); }
        .footer h4 { font-size: 1rem; font-weight: 700; color: var(--text-white); margin-bottom: 18px; }
        .footer-links { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a { color: rgba(255, 255, 255, 0.55); font-size: 0.9rem; transition: var(--transition); }
        .footer-links a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a { color: rgba(255, 255, 255, 0.45); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .posts-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid::before { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav { display: none; }
            .header-actions .search-box { display: none; }
            .hamburger { display: flex; }
            .mobile-nav {
                display: block;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border);
                padding: 20px 24px;
                transform: translateY(-110%);
                opacity: 0;
                transition: all 0.4s ease;
                z-index: 999;
                box-shadow: var(--shadow-lg);
            }
            .mobile-nav.open { transform: translateY(0); opacity: 1; }
            .mobile-nav a {
                display: block;
                padding: 14px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
                font-weight: 500;
                color: var(--text);
                transition: var(--transition);
            }
            .mobile-nav a:hover { background: rgba(26,35,126,0.06); color: var(--primary); }
            .mobile-nav a.active { background: var(--primary); color: var(--text-white); }
            .mobile-nav .mobile-cta {
                display: block;
                margin-top: 12px;
                text-align: center;
                padding: 14px;
                border-radius: var(--radius-sm);
                background: linear-gradient(135deg, var(--accent), var(--accent-light));
                color: var(--text-white);
                font-weight: 600;
            }
            .hero-title { font-size: 2.4rem; }
            .hero-desc { font-size: 1rem; }
            .hero-stats { gap: 24px; }
            .hero-stat-num { font-size: 1.8rem; }
            .section-title { font-size: 1.6rem; }
            .categories-grid { grid-template-columns: 1fr; }
            .posts-grid { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .steps-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .cta-title { font-size: 1.8rem; }
            .btn-cta-large, .btn-outline-cta { width: 100%; max-width: 320px; }
            .section { padding: 56px 0; }
            .container { padding: 0 16px; }
            .hero { min-height: 80vh; padding: 100px 16px 60px; }
        }

        @media (max-width: 520px) {
            .hero-title { font-size: 1.8rem; }
            .hero-desc { font-size: 0.95rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .btn-primary, .btn-outline-light { width: 100%; max-width: 280px; text-align: center; }
            .hero-stats { flex-direction: column; gap: 16px; align-items: center; }
            .stat-number { font-size: 2rem; }
            .feature-card { padding: 24px 20px; }
            .post-body { padding: 18px 20px; }
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .faq-answer { font-size: 0.9rem; }
            .footer { padding: 40px 0 0; }
        }

        /* ===== Extra utilities ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mb-8 { margin-bottom: 8px; }
        .gap-8 { gap: 8px; }

/* roulang page: category1 */
:root {
  --primary: #6c5ce7;
  --primary-dark: #5a4bd1;
  --primary-light: #a29bfe;
  --primary-bg: rgba(108,92,231,0.08);
  --secondary: #fd79a8;
  --accent: #00cec9;
  --accent-dark: #00b5b0;
  --bg: #ffffff;
  --bg-alt: #f8f9fe;
  --bg-dark: #1a1a2e;
  --text: #2d3436;
  --text-light: #636e72;
  --text-white: #ffffff;
  --border: #e8e8f0;
  --border-light: #f0f0f7;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 4px 20px rgba(108,92,231,0.10);
  --shadow-lg: 0 12px 48px rgba(108,92,231,0.15);
  --shadow-hover: 0 16px 48px rgba(108,92,231,0.22);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --max-width: 1200px;
  --header-h: 72px;
  --spacing: 80px;
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; font-size:16px; }
body { font-family:var(--font); color:var(--text); background:var(--bg); line-height:1.7; -webkit-font-smoothing:antialiased; }
a { color:inherit; text-decoration:none; transition:var(--transition); }
img { max-width:100%; height:auto; display:block; }
button,.btn { cursor:pointer; font-family:var(--font); border:none; outline:none; transition:var(--transition); }
input,textarea { font-family:var(--font); outline:none; transition:var(--transition); }
ul,ol { list-style:none; }
h1,h2,h3,h4,h5,h6 { line-height:1.3; font-weight:700; color:var(--text); }
h2 { font-size:2.2rem; margin-bottom:0.5rem; }
h3 { font-size:1.4rem; }

.container { max-width:var(--max-width); margin:0 auto; padding:0 24px; }
.section { padding:var(--spacing) 0; }
.section-alt { background:var(--bg-alt); }
.section-title { text-align:center; margin-bottom:3rem; }
.section-title h2 { position:relative; display:inline-block; }
.section-title h2:after { content:''; display:block; width:60px; height:4px; background:var(--primary); border-radius:4px; margin:12px auto 0; }
.section-title p { color:var(--text-light); font-size:1.1rem; max-width:640px; margin:12px auto 0; }

/* header */
.header { position:sticky; top:0; z-index:100; background:rgba(255,255,255,0.96); backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px); border-bottom:1px solid var(--border); height:var(--header-h); }
.header .container { display:flex; align-items:center; justify-content:space-between; height:100%; }
.logo { display:flex; align-items:center; gap:10px; font-size:1.35rem; font-weight:800; color:var(--primary); }
.logo i { font-size:1.6rem; }
.logo span { color:var(--text); }
.nav { display:flex; align-items:center; gap:8px; }
.nav a { padding:8px 20px; border-radius:var(--radius-sm); font-size:0.95rem; font-weight:500; color:var(--text-light); transition:var(--transition); position:relative; }
.nav a:hover { color:var(--primary); background:var(--primary-bg); }
.nav a.active { color:var(--primary); background:var(--primary-bg); font-weight:600; }
.header-actions { display:flex; align-items:center; gap:12px; }
.header-actions .search-box { display:flex; align-items:center; background:var(--bg-alt); border:1px solid var(--border); border-radius:50px; padding:0 16px; height:42px; transition:var(--transition); }
.header-actions .search-box:focus-within { border-color:var(--primary); box-shadow:0 0 0 4px var(--primary-bg); }
.header-actions .search-box input { border:none; background:transparent; padding:8px 0; font-size:0.9rem; width:160px; color:var(--text); }
.header-actions .search-box input::placeholder { color:var(--text-light); }
.header-actions .search-box i { color:var(--text-light); font-size:0.95rem; }
.header-actions .btn-primary { background:var(--primary); color:#fff; padding:10px 24px; border-radius:50px; font-size:0.9rem; font-weight:600; letter-spacing:0.3px; box-shadow:0 4px 14px rgba(108,92,231,0.25); }
.header-actions .btn-primary:hover { background:var(--primary-dark); transform:translateY(-2px); box-shadow:0 8px 24px rgba(108,92,231,0.35); }
.mobile-toggle { display:none; background:none; font-size:1.5rem; color:var(--text); padding:4px; }

/* hero banner */
.page-hero { position:relative; padding:80px 0 72px; background:linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%); overflow:hidden; min-height:320px; display:flex; align-items:center; }
.page-hero:before { content:''; position:absolute; inset:0; background:url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity:0.15; }
.page-hero:after { content:''; position:absolute; top:-50%; right:-20%; width:600px; height:600px; background:radial-gradient(circle,rgba(108,92,231,0.2) 0%,transparent 70%); border-radius:50%; pointer-events:none; }
.page-hero .container { position:relative; z-index:2; text-align:center; }
.page-hero h1 { color:var(--text-white); font-size:3rem; font-weight:800; margin-bottom:16px; letter-spacing:-0.5px; }
.page-hero h1 i { color:var(--primary-light); margin-right:12px; }
.page-hero p { color:rgba(255,255,255,0.75); font-size:1.15rem; max-width:680px; margin:0 auto 24px; line-height:1.8; }
.page-hero .hero-tags { display:flex; justify-content:center; gap:12px; flex-wrap:wrap; }
.page-hero .hero-tags span { background:rgba(255,255,255,0.12); backdrop-filter:blur(6px); border:1px solid rgba(255,255,255,0.1); padding:6px 18px; border-radius:50px; font-size:0.85rem; color:rgba(255,255,255,0.85); display:flex; align-items:center; gap:8px; }
.page-hero .hero-tags span i { color:var(--primary-light); }

/* filter bar */
.filter-bar { background:var(--bg); border-bottom:1px solid var(--border); padding:16px 0; position:sticky; top:var(--header-h); z-index:50; }
.filter-bar .container { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px; }
.filter-bar .filter-tabs { display:flex; gap:8px; flex-wrap:wrap; }
.filter-bar .filter-tabs a { padding:8px 20px; border-radius:50px; font-size:0.9rem; font-weight:500; color:var(--text-light); background:var(--bg-alt); border:1px solid var(--border); transition:var(--transition); }
.filter-bar .filter-tabs a:hover { border-color:var(--primary); color:var(--primary); }
.filter-bar .filter-tabs a.active { background:var(--primary); color:#fff; border-color:var(--primary); box-shadow:0 4px 14px rgba(108,92,231,0.25); }
.filter-bar .filter-sort { display:flex; align-items:center; gap:8px; color:var(--text-light); font-size:0.9rem; }
.filter-bar .filter-sort select { padding:8px 16px; border-radius:50px; border:1px solid var(--border); background:var(--bg); font-size:0.9rem; color:var(--text); cursor:pointer; }

/* card grid */
.card-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; margin-top:2rem; }
.card { background:var(--bg); border-radius:var(--radius); border:1px solid var(--border); overflow:hidden; transition:var(--transition); box-shadow:var(--shadow); }
.card:hover { transform:translateY(-8px); box-shadow:var(--shadow-hover); border-color:var(--primary-light); }
.card-img { position:relative; width:100%; aspect-ratio:16/9; overflow:hidden; background:var(--bg-alt); }
.card-img img { width:100%; height:100%; object-fit:cover; transition:transform 0.5s ease; }
.card:hover .card-img img { transform:scale(1.05); }
.card-img .card-tag { position:absolute; top:14px; left:14px; background:var(--primary); color:#fff; padding:4px 14px; border-radius:50px; font-size:0.75rem; font-weight:600; letter-spacing:0.3px; box-shadow:0 4px 12px rgba(108,92,231,0.3); }
.card-img .card-time { position:absolute; bottom:14px; right:14px; background:rgba(0,0,0,0.55); backdrop-filter:blur(6px); color:#fff; padding:4px 12px; border-radius:50px; font-size:0.75rem; display:flex; align-items:center; gap:6px; }
.card-body { padding:24px; }
.card-body .card-cat { font-size:0.8rem; color:var(--primary); font-weight:600; letter-spacing:0.5px; text-transform:uppercase; margin-bottom:6px; }
.card-body h3 { font-size:1.15rem; line-height:1.5; margin-bottom:10px; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.card-body h3 a { color:var(--text); }
.card-body h3 a:hover { color:var(--primary); }
.card-body p { color:var(--text-light); font-size:0.92rem; line-height:1.7; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; margin-bottom:16px; }
.card-body .card-meta { display:flex; align-items:center; justify-content:space-between; padding-top:14px; border-top:1px solid var(--border-light); font-size:0.85rem; color:var(--text-light); }
.card-body .card-meta .author { display:flex; align-items:center; gap:8px; }
.card-body .card-meta .author i { color:var(--primary); }
.card-body .card-meta .views i { margin-right:4px; }

/* featured article block */
.featured-block { display:grid; grid-template-columns:1fr 1fr; gap:40px; align-items:center; background:var(--bg); border-radius:var(--radius-lg); overflow:hidden; border:1px solid var(--border); box-shadow:var(--shadow); }
.featured-block .featured-img { width:100%; aspect-ratio:4/3; object-fit:cover; background:var(--bg-alt); }
.featured-block .featured-content { padding:40px 40px 40px 0; }
.featured-block .featured-content .badge { display:inline-block; background:var(--primary-bg); color:var(--primary); padding:4px 16px; border-radius:50px; font-size:0.8rem; font-weight:600; margin-bottom:12px; }
.featured-block .featured-content h2 { font-size:1.8rem; margin-bottom:16px; }
.featured-block .featured-content p { color:var(--text-light); line-height:1.8; margin-bottom:20px; }
.featured-block .featured-content .btn { display:inline-flex; align-items:center; gap:8px; background:var(--primary); color:#fff; padding:12px 28px; border-radius:50px; font-weight:600; font-size:0.95rem; }
.featured-block .featured-content .btn:hover { background:var(--primary-dark); transform:translateY(-2px); box-shadow:0 8px 24px rgba(108,92,231,0.3); }

/* steps / process */
.steps-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; margin-top:2rem; }
.step-card { background:var(--bg); border-radius:var(--radius); padding:32px 24px; text-align:center; border:1px solid var(--border); transition:var(--transition); position:relative; }
.step-card:hover { transform:translateY(-6px); box-shadow:var(--shadow-hover); }
.step-card .step-num { width:52px; height:52px; background:var(--primary-bg); color:var(--primary); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:1.4rem; font-weight:800; margin:0 auto 18px; transition:var(--transition); }
.step-card:hover .step-num { background:var(--primary); color:#fff; }
.step-card h4 { font-size:1.1rem; margin-bottom:8px; }
.step-card p { font-size:0.9rem; color:var(--text-light); line-height:1.7; }

/* faq */
.faq-list { max-width:800px; margin:2rem auto 0; }
.faq-item { background:var(--bg); border:1px solid var(--border); border-radius:var(--radius-sm); margin-bottom:12px; overflow:hidden; transition:var(--transition); }
.faq-item:hover { border-color:var(--primary-light); }
.faq-item summary { padding:20px 24px; font-size:1.05rem; font-weight:600; cursor:pointer; display:flex; align-items:center; justify-content:space-between; list-style:none; transition:var(--transition); }
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary i { color:var(--primary); transition:var(--transition); font-size:0.9rem; }
.faq-item[open] summary i { transform:rotate(180deg); }
.faq-item .faq-answer { padding:0 24px 20px; color:var(--text-light); line-height:1.8; font-size:0.95rem; }

/* cta */
.cta-section { background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%); padding:64px 0; text-align:center; position:relative; overflow:hidden; }
.cta-section:before { content:''; position:absolute; top:-40%; right:-20%; width:500px; height:500px; background:rgba(255,255,255,0.06); border-radius:50%; pointer-events:none; }
.cta-section .container { position:relative; z-index:2; }
.cta-section h2 { color:#fff; font-size:2.2rem; margin-bottom:12px; }
.cta-section p { color:rgba(255,255,255,0.8); font-size:1.1rem; max-width:600px; margin:0 auto 28px; }
.cta-section .btn-group { display:flex; justify-content:center; gap:16px; flex-wrap:wrap; }
.cta-section .btn-white { background:#fff; color:var(--primary); padding:14px 36px; border-radius:50px; font-weight:700; font-size:1rem; box-shadow:0 8px 24px rgba(0,0,0,0.15); }
.cta-section .btn-white:hover { transform:translateY(-3px); box-shadow:0 12px 32px rgba(0,0,0,0.25); }
.cta-section .btn-outline-white { background:transparent; border:2px solid rgba(255,255,255,0.4); color:#fff; padding:14px 36px; border-radius:50px; font-weight:600; font-size:1rem; }
.cta-section .btn-outline-white:hover { background:rgba(255,255,255,0.12); border-color:#fff; transform:translateY(-3px); }

/* footer */
.footer { background:var(--bg-dark); color:rgba(255,255,255,0.7); padding:56px 0 0; }
.footer .footer-grid { display:grid; grid-template-columns:1.8fr 1fr 1fr 1fr; gap:40px; padding-bottom:40px; border-bottom:1px solid rgba(255,255,255,0.08); }
.footer .logo { color:#fff; margin-bottom:16px; }
.footer .logo span { color:#fff; }
.footer .footer-desc { font-size:0.92rem; line-height:1.8; color:rgba(255,255,255,0.55); max-width:360px; margin-bottom:20px; }
.footer .footer-social { display:flex; gap:14px; }
.footer .footer-social a { width:40px; height:40px; border-radius:50%; background:rgba(255,255,255,0.08); display:flex; align-items:center; justify-content:center; color:rgba(255,255,255,0.6); font-size:1.1rem; transition:var(--transition); }
.footer .footer-social a:hover { background:var(--primary); color:#fff; transform:translateY(-3px); }
.footer h4 { color:#fff; font-size:1rem; font-weight:600; margin-bottom:18px; letter-spacing:0.5px; }
.footer .footer-links { display:flex; flex-direction:column; gap:10px; }
.footer .footer-links a { color:rgba(255,255,255,0.5); font-size:0.9rem; transition:var(--transition); }
.footer .footer-links a:hover { color:var(--primary-light); padding-left:4px; }
.footer .footer-bottom { padding:20px 0; text-align:center; font-size:0.85rem; color:rgba(255,255,255,0.35); }
.footer .footer-bottom a { color:rgba(255,255,255,0.45); }
.footer .footer-bottom a:hover { color:var(--primary-light); }

/* responsive */
@media (max-width:1024px) {
  .card-grid { grid-template-columns:repeat(2,1fr); }
  .featured-block { grid-template-columns:1fr; }
  .featured-block .featured-content { padding:40px; }
  .steps-grid { grid-template-columns:repeat(2,1fr); }
  .footer .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .page-hero h1 { font-size:2.4rem; }
}

@media (max-width:768px) {
  .nav { display:none; }
  .header-actions .btn-primary { display:none; }
  .mobile-toggle { display:block; }
  .mobile-menu-open .nav { display:flex; flex-direction:column; position:absolute; top:var(--header-h); left:0; right:0; background:rgba(255,255,255,0.98); backdrop-filter:blur(20px); border-bottom:1px solid var(--border); padding:16px 24px; gap:6px; box-shadow:var(--shadow-lg); }
  .page-hero h1 { font-size:2rem; }
  .page-hero p { font-size:1rem; }
  .section-title h2 { font-size:1.8rem; }
  .card-grid { grid-template-columns:1fr; gap:20px; }
  .steps-grid { grid-template-columns:1fr; gap:16px; }
  .footer .footer-grid { grid-template-columns:1fr; gap:28px; }
  .filter-bar .container { flex-direction:column; align-items:flex-start; }
  .filter-bar .filter-sort { width:100%; }
  .filter-bar .filter-sort select { width:100%; }
  .page-hero { padding:56px 0 48px; min-height:240px; }
  .header-actions .search-box input { width:100px; }
  .featured-block .featured-content { padding:24px; }
  .featured-block .featured-content h2 { font-size:1.4rem; }
  .cta-section h2 { font-size:1.7rem; }
}

@media (max-width:520px) {
  .page-hero h1 { font-size:1.6rem; }
  .container { padding:0 16px; }
  .section { padding:48px 0; }
  .header-actions .search-box { flex:1; }
  .header-actions .search-box input { width:100%; }
  .hero-tags span { font-size:0.75rem; padding:4px 12px; }
  .card-body { padding:18px; }
  .filter-tabs a { padding:6px 14px; font-size:0.8rem; }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 20px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
            --shadow-hover: 0 20px 60px rgba(0,0,0,0.10), 0 8px 24px rgba(0,0,0,0.06);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
            --gap: 32px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: var(--radius-xs); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--secondary); }

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

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 4px rgba(0,0,0,0.02);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.3px;
        }
        .logo i { font-size: 26px; color: var(--primary); }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; }

        .nav { display: flex; align-items: center; gap: 6px; }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover { color: var(--primary); background: rgba(37,99,235,0.06); }
        .nav a.active {
            color: var(--primary);
            background: rgba(37,99,235,0.10);
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

        .header-actions { display: flex; align-items: center; gap: 14px; }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border-light);
            border-radius: 40px;
            padding: 0 16px;
            height: 40px;
            transition: var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(37,99,235,0.10); }
        .search-box i { color: var(--text-muted); font-size: 15px; }
        .search-box input {
            border: none;
            background: transparent;
            padding: 0 10px;
            font-size: 14px;
            color: var(--text);
            width: 140px;
            outline: none;
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            border: none;
            cursor: pointer;
            background: var(--primary);
            color: #fff;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(37,99,235,0.25);
        }
        .btn-cta:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.30); color: #fff; }
        .btn-cta:active { transform: translateY(0); }

        .menu-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--text); cursor: pointer; padding: 4px; }

        /* ===== 移动端导航 ===== */
        @media (max-width: 968px) {
            .nav { display: none; }
            .nav.mobile-open { display: flex; flex-direction: column; position: fixed; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 20px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); gap: 8px; z-index: 999; }
            .nav a { padding: 12px 16px; font-size: 16px; border-radius: var(--radius-xs); }
            .nav a.active::after { display: none; }
            .nav a.active { background: rgba(37,99,235,0.10); }
            .menu-toggle { display: block; }
            .search-box input { width: 100px; }
            .btn-cta { padding: 8px 16px; font-size: 13px; }
        }
        @media (max-width: 520px) {
            .header .container { gap: 8px; }
            .logo { font-size: 18px; }
            .logo i { font-size: 20px; }
            .search-box { flex: 1; max-width: 140px; }
            .search-box input { width: 80px; font-size: 13px; }
            .btn-cta { padding: 6px 14px; font-size: 12px; white-space: nowrap; }
        }

        /* ===== 文章页面主区 ===== */
        .article-page {
            padding-top: calc(var(--header-h) + 40px);
            padding-bottom: 80px;
            background: var(--bg-alt);
            min-height: 100vh;
        }
        .article-page .container {
            max-width: 880px;
        }
        .article-header {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px 48px 32px;
            margin-bottom: var(--gap);
        }
        .article-header .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-header .breadcrumb a { color: var(--text-light); }
        .article-header .breadcrumb a:hover { color: var(--primary); }
        .article-header .breadcrumb i { font-size: 12px; color: var(--text-muted); }
        .article-header .breadcrumb .current { color: var(--text); font-weight: 500; }
        .article-header h1 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--secondary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 14px;
            color: var(--text-light);
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 28px;
        }
        .article-meta .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            background: rgba(37,99,235,0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
        }
        .article-meta i { margin-right: 6px; color: var(--text-muted); }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px;
            margin-bottom: var(--gap);
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body h2 { font-size: 24px; margin-top: 40px; margin-bottom: 16px; }
        .article-body h3 { font-size: 20px; margin-top: 32px; margin-bottom: 12px; }
        .article-body p { margin-bottom: 20px; }
        .article-body ul, .article-body ol { margin-bottom: 20px; padding-left: 24px; }
        .article-body li { margin-bottom: 8px; list-style: disc; }
        .article-body a { color: var(--primary); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--primary-dark); }
        .article-body img { border-radius: var(--radius-sm); margin: 24px 0; box-shadow: var(--shadow-sm); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-alt);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
            color: var(--text-light);
            font-style: normal;
        }
        .article-body code {
            background: var(--bg-alt);
            padding: 2px 10px;
            border-radius: var(--radius-xs);
            font-size: 15px;
            color: var(--primary-dark);
            border: 1px solid var(--border-light);
        }
        .article-body pre {
            background: var(--secondary);
            color: #e2e8f0;
            padding: 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 15px;
            line-height: 1.6;
            margin: 24px 0;
        }
        .article-body pre code { background: transparent; color: inherit; border: none; padding: 0; }

        .article-notfound {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 80px 48px;
            text-align: center;
        }
        .article-notfound i { font-size: 56px; color: var(--text-muted); margin-bottom: 20px; display: block; }
        .article-notfound h2 { font-size: 24px; margin-bottom: 12px; }
        .article-notfound p { color: var(--text-light); margin-bottom: 24px; }
        .article-notfound .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 40px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .article-notfound .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); color: #fff; }

        .article-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 20px 32px;
            margin-bottom: var(--gap);
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-light);
            font-weight: 500;
            font-size: 15px;
        }
        .article-nav a:hover { color: var(--primary); }
        .article-nav .back-home {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--secondary);
            color: #cbd5e1;
            padding: 60px 0 0;
        }
        .footer .container { max-width: var(--max-width); }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px 32px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo i { color: var(--primary-light); }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-desc { font-size: 15px; line-height: 1.7; color: #94a3b8; margin-bottom: 20px; max-width: 360px; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: #94a3b8;
            font-size: 18px;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }

        .footer h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 18px; letter-spacing: 0.3px; }
        .footer-links { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a { color: #94a3b8; font-size: 15px; transition: var(--transition); }
        .footer-links a:hover { color: #fff; padding-left: 4px; }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 14px;
            color: #64748b;
        }
        .footer-bottom a { color: #94a3b8; }
        .footer-bottom a:hover { color: #fff; }

        @media (max-width: 968px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-desc { max-width: 100%; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer { padding: 40px 0 0; }
        }

        /* ===== 文章页响应式 ===== */
        @media (max-width: 768px) {
            .article-page { padding-top: calc(var(--header-h) + 24px); padding-bottom: 48px; }
            .article-header { padding: 28px 24px; }
            .article-header h1 { font-size: 24px; }
            .article-body { padding: 28px 24px; font-size: 16px; }
            .article-body h2 { font-size: 20px; }
            .article-body h3 { font-size: 18px; }
            .article-nav { padding: 16px 20px; flex-direction: column; align-items: flex-start; }
            .article-notfound { padding: 48px 24px; }
        }
        @media (max-width: 520px) {
            .article-header { padding: 20px 16px; border-radius: var(--radius-sm); }
            .article-header h1 { font-size: 20px; }
            .article-body { padding: 20px 16px; font-size: 15px; }
            .article-meta { gap: 10px 16px; font-size: 13px; flex-wrap: wrap; }
            .article-nav { padding: 12px 16px; }
        }

        /* ===== 通用工具 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }

/* roulang page: category2 */
/* ===== CSS 设计变量 ===== */
        :root {
            --primary: #1e2a4a;
            --primary-light: #2c3f6e;
            --primary-dark: #121c33;
            --accent: #4f8cff;
            --accent-hover: #3a7ae8;
            --accent-light: #e8f0ff;
            --gold: #f0b840;
            --gold-light: #fce8b0;
            --bg: #f5f7fc;
            --bg-card: #ffffff;
            --bg-dark: #0f1628;
            --text: #1f2937;
            --text-light: #6b7a8f;
            --text-white: #f0f4ff;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(30, 42, 74, 0.08);
            --shadow-hover: 0 12px 40px rgba(30, 42, 74, 0.14);
            --shadow-hero: 0 8px 48px rgba(0, 0, 0, 0.30);
            --transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-w: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: all var(--transition);
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Nav ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(30, 42, 74, 0.04);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--accent);
            font-size: 28px;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 15px;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--accent-light);
        }
        .nav a.active {
            color: var(--accent);
            background: var(--accent-light);
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--accent);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.15);
        }
        .search-box i {
            color: var(--text-light);
            font-size: 14px;
            margin-right: 8px;
        }
        .search-box input {
            background: transparent;
            padding: 8px 0;
            width: 150px;
            font-size: 14px;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 4px 14px rgba(79, 140, 255, 0.30);
            transition: all var(--transition);
            border: none;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 140, 255, 0.40);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-primary i {
            font-size: 14px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent);
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            border: 2px solid var(--accent);
            transition: all var(--transition);
        }
        .btn-outline:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 140, 255, 0.25);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-gold {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--gold);
            color: var(--primary-dark);
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 16px;
            box-shadow: 0 4px 16px rgba(240, 184, 64, 0.35);
            transition: all var(--transition);
            border: none;
        }
        .btn-gold:hover {
            background: #e5a830;
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(240, 184, 64, 0.45);
        }
        .btn-gold:active {
            transform: translateY(0);
        }

        /* ===== Mobile Nav Toggle ===== */
        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--primary);
            background: none;
            border: none;
            padding: 4px;
            cursor: pointer;
        }

        /* ===== Hero / Banner ===== */
        .hero-banner {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            padding: 80px 24px 60px;
            overflow: hidden;
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 22, 40, 0.82) 0%, rgba(30, 42, 74, 0.70) 100%);
            z-index: 1;
        }
        .hero-banner .container {
            position: relative;
            z-index: 2;
        }
        .hero-banner h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
        }
        .hero-banner h1 i {
            color: var(--gold);
            margin-right: 10px;
        }
        .hero-banner p {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }
        .hero-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 20px;
        }
        .hero-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            text-decoration: underline;
            text-underline-offset: 4px;
        }
        .hero-banner .breadcrumb a:hover {
            color: var(--gold);
        }
        .hero-banner .breadcrumb span {
            color: var(--gold);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-header h2 i {
            color: var(--accent);
            margin-right: 8px;
        }
        .section-header p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header.light h2 {
            color: var(--text-white);
        }
        .section-header.light p {
            color: rgba(255, 255, 255, 0.75);
        }
        .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            margin: 16px auto 0;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent);
            margin-bottom: 18px;
            transition: all var(--transition);
        }
        .card:hover .card-icon {
            background: var(--accent);
            color: #fff;
        }
        .card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .card .card-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            margin-top: 14px;
        }
        .card-cover {
            overflow: hidden;
            padding: 0 0 20px;
        }
        .card-cover .cover-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius) var(--radius) 0 0;
            transition: transform 0.5s ease;
        }
        .card-cover:hover .cover-img {
            transform: scale(1.06);
        }
        .card-cover .card-body {
            padding: 20px 20px 8px;
        }
        .card-cover .card-body h3 {
            font-size: 18px;
        }
        .card-cover .card-body .meta {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            margin-top: 10px;
        }
        .card-cover .card-body .meta i {
            margin-right: 4px;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(79, 140, 255, 0.30);
        }
        .step-item .step-icon {
            font-size: 36px;
            color: var(--accent);
            margin-bottom: 14px;
            margin-top: 6px;
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-light);
        }
        .step-connector {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            color: var(--primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
            border: none;
        }
        .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            font-size: 14px;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-light);
            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-3.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 22, 40, 0.85) 0%, rgba(30, 42, 74, 0.75) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-gold {
            font-size: 18px;
            padding: 14px 40px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 56px 0 24px;
        }
        .footer .container {
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .logo i {
            color: var(--gold);
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, #fff, var(--gold));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.60);
            max-width: 360px;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.70);
            font-size: 18px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: all var(--transition);
        }
        .footer-links a:hover {
            color: var(--gold);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.40);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.60);
        }
        .footer-bottom a:hover {
            color: var(--gold);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-banner h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
            }
            .nav.open {
                display: flex;
            }
            .nav a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-xs);
            }
            .nav a.active::after {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .search-box input {
                width: 100px;
            }
            .header-actions .btn-primary span {
                display: none;
            }
            .hero-banner {
                min-height: 280px;
                padding: 60px 20px 48px;
            }
            .hero-banner h1 {
                font-size: 30px;
            }
            .hero-banner p {
                font-size: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header p {
                font-size: 16px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-item {
                padding: 24px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand .footer-desc {
                max-width: 100%;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section p {
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-banner h1 {
                font-size: 24px;
            }
            .hero-banner p {
                font-size: 14px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .card {
                padding: 20px 16px;
            }
            .btn-gold {
                padding: 10px 24px;
                font-size: 14px;
            }
            .search-box input {
                width: 80px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: var(--accent-light);
            color: var(--accent);
            margin-right: 6px;
        }
        .badge-gold {
            background: var(--gold-light);
            color: #8a6d1b;
        }
        .badge-green {
            background: #e0f7e9;
            color: #1a7a4c;
        }