/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f2b5e;
            --primary-light: #1a3d7a;
            --primary-dark: #091a3a;
            --secondary: #d4a84b;
            --secondary-light: #e8c46a;
            --secondary-dark: #b88d2e;
            --accent: #3b7dd8;
            --bg-body: #f5f7fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0a1628;
            --text-dark: #1a1a2e;
            --text-muted: #6b7a8f;
            --text-light: #b0bcca;
            --border: #e2e6ed;
            --border-light: #f0f2f6;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 43, 94, 0.06);
            --shadow: 0 6px 28px rgba(15, 43, 94, 0.08);
            --shadow-hover: 0 12px 48px rgba(15, 43, 94, 0.14);
            --shadow-lg: 0 20px 60px rgba(15, 43, 94, 0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== 基础 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-dark);
            background: var(--bg-body);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; }
        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(--text-dark); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }

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

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            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);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 20px rgba(15, 43, 94, 0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--secondary);
            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 { color: var(--primary); }
        .nav-center {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-center a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-dark);
            position: relative;
            transition: var(--transition);
        }
        .nav-center a:hover {
            color: var(--primary);
            background: rgba(15, 43, 94, 0.05);
        }
        .nav-center a.active {
            color: var(--primary);
            background: rgba(15, 43, 94, 0.08);
        }
        .nav-center a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border-radius: 40px;
            padding: 6px 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
            min-width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 43, 94, 0.1);
        }
        .search-box i {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            padding: 6px 0;
            font-size: 0.9rem;
            color: var(--text-dark);
            width: 100%;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            padding: 10px 26px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(15, 43, 94, 0.2);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(15, 43, 94, 0.3);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-white);
            color: var(--primary);
            padding: 10px 26px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--border);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(15, 43, 94, 0.04);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px;
        }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 40%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 600px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(10px);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--secondary-light);
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            font-size: 3.2rem;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .hero h1 span {
            color: var(--secondary);
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 580px;
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(212, 168, 75, 0.4);
        }
        .hero .btn-primary:hover {
            box-shadow: 0 8px 36px rgba(212, 168, 75, 0.5);
            color: var(--primary-dark);
        }
        .hero .btn-secondary {
            border-color: rgba(255, 255, 255, 0.3);
            color: #fff;
            background: transparent;
        }
        .hero .btn-secondary:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-stat h3 {
            font-size: 1.8rem;
            color: #fff;
            margin-bottom: 2px;
        }
        .hero-stat p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 0;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 52px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
        }
        .section-tag {
            display: inline-block;
            background: rgba(15, 43, 94, 0.06);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        /* ===== 优势卡片 ===== */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .advantage-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .advantage-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .advantage-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(15, 43, 94, 0.06), rgba(212, 168, 75, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .advantage-card:hover .advantage-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            transform: scale(1.05);
        }
        .advantage-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .advantage-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 分类入口 ===== */
        .category-section {
            background: var(--bg-white);
        }
        .category-card {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .category-image {
            width: 280px;
            min-height: 220px;
            flex-shrink: 0;
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
        }
        .category-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover .category-image img {
            transform: scale(1.05);
        }
        .category-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to right, transparent, rgba(15, 43, 94, 0.1));
        }
        .category-body {
            padding: 32px 40px;
            flex: 1;
        }
        .category-body h3 {
            font-size: 1.4rem;
            margin-bottom: 10px;
        }
        .category-body p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }
        .category-meta {
            display: flex;
            gap: 24px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .category-meta i {
            margin-right: 6px;
        }

        /* ===== 资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .news-thumb {
            height: 180px;
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.05);
        }
        .news-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--secondary);
            color: var(--primary-dark);
            padding: 3px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .news-body {
            padding: 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .news-footer i {
            margin-right: 4px;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 16px;
        }

        /* ===== 功能特色 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .feature-card {
            display: flex;
            gap: 20px;
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 32px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: rgba(15, 43, 94, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
        }
        .feature-text h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .feature-text p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 36px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            counter-increment: step;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 18px;
        }
        .step-card h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .step-connector {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            user-select: none;
        }
        .faq-question i {
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 0.85rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 28px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-content h2 {
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 32px;
            font-size: 1.05rem;
        }
        .cta-content .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
            box-shadow: 0 4px 24px rgba(212, 168, 75, 0.35);
            font-size: 1.05rem;
            padding: 14px 36px;
        }
        .cta-content .btn-primary:hover {
            box-shadow: 0 8px 40px rgba(212, 168, 75, 0.5);
            color: var(--primary-dark);
        }
        .cta-note {
            margin-top: 20px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 16px;
        }
        .footer-brand .logo i {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 280px;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.88rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.4);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary-dark);
            padding-left: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .advantages-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .hero h1 { font-size: 2.6rem; }
        }

        @media (max-width: 768px) {
            .nav-center { display: none; }
            .nav-right .search-box { display: none; }
            .mobile-toggle { display: block; }
            .nav-right .btn-primary { padding: 8px 18px; font-size: 0.85rem; }

            .mobile-menu-open .nav-center {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                padding: 20px 24px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow);
                gap: 4px;
            }
            .mobile-menu-open .nav-center a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .mobile-menu-open .nav-center a.active::after {
                display: none;
            }
            .mobile-menu-open .nav-center a.active {
                background: rgba(15, 43, 94, 0.06);
            }

            .hero { padding: 120px 0 60px; min-height: auto; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat h3 { font-size: 1.4rem; }

            .section { padding: 60px 0; }
            .section-header { margin-bottom: 36px; }
            .section-header h2 { font-size: 1.6rem; }

            .advantages-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }

            .category-card { flex-direction: column; }
            .category-image { width: 100%; min-height: 180px; }
            .category-body { padding: 24px; }

            .feature-card { padding: 20px 24px; }
            .step-card { padding: 24px 16px; }

            .faq-question { padding: 16px 20px; font-size: 0.95rem; }
            .faq-answer { font-size: 0.9rem; }

            .cta-section { padding: 60px 0; }
            .cta-content h2 { font-size: 1.6rem; }

            .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.7rem; }
            .hero-buttons { flex-direction: column; }
            .hero .btn-primary, .hero .btn-secondary { width: 100%; justify-content: center; }
            .hero-stats { flex-direction: column; gap: 16px; }
            .steps-grid { grid-template-columns: 1fr; }
            .news-thumb { height: 140px; }
            .feature-card { flex-direction: column; text-align: center; }
            .feature-icon { margin: 0 auto; }
            .logo { font-size: 1.1rem; }
            .logo i { font-size: 1.3rem; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mb-2 { margin-bottom: 16px; }
        .gap-2 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
:root {
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --secondary: #f39c12;
            --secondary-light: #f1c40f;
            --accent: #2c3e50;
            --bg-light: #f8f9fa;
            --bg-dark: #1a252f;
            --text-dark: #2c3e50;
            --text-body: #4a5568;
            --text-muted: #7f8c8d;
            --text-light: #ecf0f1;
            --border: #e0e4e8;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 18px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: #fff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            padding-top: var(--header-h);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .row { max-width: var(--max-width); margin: 0 auto; }

        /* Header / Nav */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-h);
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(0,0,0,0.04);
            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: 10px;
            font-size: 22px; font-weight: 700; color: var(--primary); white-space: nowrap;
        }
        .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; }
        .nav-center { display: flex; align-items: center; gap: 8px; flex: 1; justify-content: center; }
        .nav-center a {
            padding: 8px 20px; border-radius: 30px; font-size: 15px; font-weight: 500;
            color: var(--text-dark); transition: var(--transition); position: relative;
        }
        .nav-center a:hover { background: rgba(192,57,43,0.06); color: var(--primary); }
        .nav-center a.active { background: var(--primary); color: #fff; }
        .nav-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
        .nav-right .search-wrap {
            display: flex; align-items: center; background: var(--bg-light);
            border-radius: 30px; padding: 0 16px; border: 1px solid var(--border);
            transition: var(--transition);
        }
        .nav-right .search-wrap:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(192,57,43,0.1); }
        .nav-right .search-wrap input {
            border: none; background: transparent; padding: 8px 8px; font-size: 14px;
            outline: none; width: 140px; color: var(--text-dark);
        }
        .nav-right .search-wrap input::placeholder { color: var(--text-muted); }
        .nav-right .search-wrap button {
            background: none; border: none; color: var(--text-muted); cursor: pointer;
            font-size: 16px; padding: 6px 4px; transition: var(--transition);
        }
        .nav-right .search-wrap button:hover { color: var(--primary); }
        .nav-right .cta-btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 10px 24px; border-radius: 30px; font-size: 15px; font-weight: 600;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff; border: none; cursor: pointer; transition: var(--transition);
            box-shadow: 0 4px 14px rgba(192,57,43,0.25);
        }
        .nav-right .cta-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(192,57,43,0.35); color: #fff; }
        .mobile-toggle { display: none; font-size: 24px; color: var(--text-dark); cursor: pointer; background: none; border: none; padding: 6px; }

        /* Article Hero */
        .article-hero {
            position: relative;
            background: linear-gradient(135deg, #1a252f 0%, #2c3e50 50%, #1a252f 100%);
            padding: 60px 0 50px;
            text-align: center;
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.10;
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero h1 {
            font-size: 38px; font-weight: 800; color: #fff;
            line-height: 1.3; max-width: 800px; margin: 0 auto 16px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }
        .article-hero .meta-bar {
            display: flex; align-items: center; justify-content: center; gap: 24px;
            flex-wrap: wrap; color: rgba(255,255,255,0.75); font-size: 15px;
        }
        .article-hero .meta-bar i { margin-right: 6px; }
        .article-hero .meta-bar .tag {
            display: inline-block; padding: 4px 14px; border-radius: 20px;
            background: rgba(255,255,255,0.15); color: #fff; font-size: 13px; font-weight: 500;
        }

        /* Article Main */
        .article-main { padding: 48px 0 64px; background: #fff; }
        .article-body {
            max-width: 820px; margin: 0 auto;
            font-size: 17px; line-height: 1.9; color: var(--text-body);
        }
        .article-body h2 { font-size: 26px; font-weight: 700; color: var(--text-dark); margin: 40px 0 16px; }
        .article-body h3 { font-size: 21px; font-weight: 600; color: var(--text-dark); margin: 32px 0 12px; }
        .article-body p { margin-bottom: 20px; }
        .article-body ul, .article-body ol { margin: 16px 0 20px 24px; }
        .article-body li { margin-bottom: 8px; }
        .article-body a { color: var(--primary); text-decoration: underline; }
        .article-body blockquote {
            border-left: 4px solid var(--primary); background: var(--bg-light);
            padding: 16px 24px; margin: 24px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic; color: var(--text-dark);
        }
        .article-body img { border-radius: var(--radius); margin: 28px auto; box-shadow: var(--shadow); }
        .article-body .content-placeholder {
            background: var(--bg-light); border-radius: var(--radius);
            padding: 40px; text-align: center; color: var(--text-muted); font-size: 16px;
        }
        .article-body .content-placeholder i { font-size: 48px; color: var(--primary-light); margin-bottom: 16px; opacity: 0.5; }

        /* Not Found */
        .not-found-box {
            text-align: center; padding: 80px 24px; max-width: 600px; margin: 0 auto;
        }
        .not-found-box i { font-size: 64px; color: var(--primary-light); opacity: 0.5; margin-bottom: 24px; }
        .not-found-box h2 { font-size: 28px; color: var(--text-dark); margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 28px; }
        .not-found-box .btn-back {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 32px; border-radius: 30px; font-size: 16px; font-weight: 600;
            background: var(--primary); color: #fff; transition: var(--transition);
        }
        .not-found-box .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); color: #fff; }

        /* Related Posts */
        .related-section { background: var(--bg-light); padding: 48px 0 56px; }
        .related-section h2 { font-size: 28px; font-weight: 700; color: var(--text-dark); text-align: center; margin-bottom: 36px; }
        .related-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .related-card {
            background: #fff; border-radius: var(--radius); overflow: hidden;
            box-shadow: var(--shadow); transition: var(--transition);
            display: flex; flex-direction: column;
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .related-card .card-img {
            height: 180px; overflow: hidden; position: relative;
            background: var(--bg-light);
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
        .related-card .card-body .cat-tag {
            display: inline-block; padding: 2px 12px; border-radius: 20px;
            background: rgba(192,57,43,0.08); color: var(--primary); font-size: 12px; font-weight: 600;
            margin-bottom: 8px; align-self: flex-start;
        }
        .related-card .card-body h3 { font-size: 18px; font-weight: 600; color: var(--text-dark); margin-bottom: 8px; line-height: 1.4; }
        .related-card .card-body h3 a { color: var(--text-dark); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 14px; color: var(--text-muted); flex: 1; margin-bottom: 12px; }
        .related-card .card-body .meta { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 16px; }

        /* Footer */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: 48px 0 0;
        }
        .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
            padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .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-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 360px; }
        .footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 14px; padding: 5px 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--primary-light); transform: translateX(4px); }
        .footer-col a i { width: 20px; }
        .footer-bottom {
            display: flex; align-items: center; justify-content: space-between;
            padding: 20px 0; flex-wrap: wrap; gap: 12px;
            font-size: 13px; color: rgba(255,255,255,0.4);
        }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a { color: rgba(255,255,255,0.5); font-size: 20px; transition: var(--transition); }
        .footer-social a:hover { color: var(--primary-light); transform: scale(1.15); }

        /* Responsive */
        @media screen and (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media screen and (max-width: 768px) {
            body { padding-top: 64px; }
            .site-header { height: 64px; }
            .logo { font-size: 18px; }
            .logo i { font-size: 20px; }
            .nav-center { display: none; }
            .nav-center.open { display: flex; flex-direction: column; position: fixed; top: 64px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); padding: 16px 24px 24px; box-shadow: 0 8px 24px rgba(0,0,0,0.1); gap: 6px; z-index: 999; }
            .nav-center.open a { padding: 12px 20px; border-radius: 8px; width: 100%; text-align: center; }
            .mobile-toggle { display: block; }
            .nav-right .search-wrap { display: none; }
            .nav-right .cta-btn { padding: 8px 18px; font-size: 14px; }
            .article-hero { padding: 40px 0 36px; min-height: 180px; }
            .article-hero h1 { font-size: 26px; }
            .article-hero .meta-bar { font-size: 13px; gap: 12px; }
            .article-main { padding: 32px 0 40px; }
            .article-body { font-size: 16px; }
            .article-body h2 { font-size: 22px; }
            .article-body h3 { font-size: 18px; }
            .related-grid { grid-template-columns: 1fr; }
            .related-section h2 { font-size: 22px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media screen and (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 22px; }
            .article-body { font-size: 15px; }
            .nav-right .cta-btn { padding: 6px 14px; font-size: 13px; gap: 4px; }
            .nav-right .cta-btn span { display: none; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a7e8c;
            --primary-dark: #065e6a;
            --primary-light: #e0f2f5;
            --secondary: #f5a623;
            --secondary-light: #fef3e0;
            --accent: #2d9cdb;
            --bg-white: #ffffff;
            --bg-light: #f7fafc;
            --bg-dark: #1a2e3c;
            --text-dark: #1a2e3c;
            --text-body: #3d5a6d;
            --text-muted: #7a9aad;
            --text-white: #f0f8ff;
            --border-light: #e2edf2;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(10, 126, 140, 0.07);
            --shadow-md: 0 6px 24px rgba(10, 126, 140, 0.10);
            --shadow-lg: 0 12px 40px rgba(10, 126, 140, 0.14);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --spacing-section: 5.5rem;
            --spacing-block: 2.8rem;
            --max-width: 1200px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 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-base);
            color: var(--text-body);
            background: var(--bg-white);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 4px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); line-height: 1.3; font-weight: 600; letter-spacing: -0.01em; }
        h1 { font-size: 2.8rem; font-weight: 700; }
        h2 { font-size: 2.2rem; margin-bottom: 0.75rem; }
        h3 { font-size: 1.4rem; font-weight: 600; }
        h4 { font-size: 1.15rem; font-weight: 600; }
        p { margin-bottom: 1rem; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.8rem; }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(10px);
            background: rgba(255,255,255,0.94);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.8rem;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
        }
        .logo i { font-size: 1.7rem; color: var(--primary); }
        .logo span { color: var(--text-dark); }
        .nav-center {
            display: flex;
            align-items: center;
            gap: 2.2rem;
        }
        .nav-center a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 0.3rem 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-center a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 4px;
            transition: width var(--transition);
        }
        .nav-center a:hover { color: var(--primary); }
        .nav-center a:hover::after { width: 100%; }
        .nav-center a.active { color: var(--primary); font-weight: 600; }
        .nav-center a.active::after { width: 100%; }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 40px;
            padding: 0.4rem 1rem 0.4rem 1.2rem;
            border: 1px solid var(--border-light);
            transition: border var(--transition), box-shadow var(--transition);
            width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(10,126,140,0.10);
        }
        .search-box input {
            border: none;
            background: transparent;
            padding: 0.4rem 0;
            font-size: 0.9rem;
            color: var(--text-dark);
            width: 100%;
            outline: none;
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .search-box button {
            color: var(--text-muted);
            font-size: 0.95rem;
            padding: 0.2rem 0 0.2rem 0.6rem;
            transition: color var(--transition);
        }
        .search-box button:hover { color: var(--primary); }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            padding: 0.6rem 1.6rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }
        .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--bg-white);
            color: var(--primary);
            padding: 0.6rem 1.6rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid var(--border-light);
            transition: background var(--transition), border var(--transition), transform var(--transition);
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-secondary:active { transform: translateY(0); }
        .menu-toggle { display: none; font-size: 1.5rem; color: var(--text-dark); padding: 0.4rem; }

        /* ===== Banner / Hero ===== */
        .page-banner {
            position: relative;
            padding: 7rem 0 5rem;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            text-align: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,126,140,0.82) 0%, rgba(26,46,60,0.88) 100%);
            z-index: 1;
        }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner h1 {
            color: var(--text-white);
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            text-shadow: 0 2px 12px rgba(0,0,0,0.12);
        }
        .page-banner p {
            color: rgba(255,255,255,0.88);
            font-size: 1.2rem;
            max-width: 680px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .banner-badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(6px);
            color: var(--text-white);
            padding: 0.3rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.2rem;
            border: 1px solid rgba(255,255,255,0.18);
        }
        .banner-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
        .banner-actions .btn-primary {
            background: var(--secondary);
            color: var(--text-dark);
            padding: 0.75rem 2.4rem;
            font-size: 1rem;
            box-shadow: 0 4px 20px rgba(245,166,35,0.30);
        }
        .banner-actions .btn-primary:hover { background: #e8991f; transform: translateY(-3px); }
        .banner-actions .btn-secondary {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.25);
            color: var(--text-white);
            padding: 0.75rem 2.4rem;
            font-size: 1rem;
        }
        .banner-actions .btn-secondary:hover { background: rgba(255,255,255,0.22); border-color: rgba(255,255,255,0.4); }

        /* ===== 板块通用 ===== */
        .section { padding: var(--spacing-section) 0; }
        .section-label {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 0.8rem;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-dark);
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin-bottom: 2.5rem;
            line-height: 1.7;
        }
        .text-center { text-align: center; }
        .text-center .section-subtitle { margin-left: auto; margin-right: auto; }

        /* ===== 平台简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }
        .intro-content h2 { font-size: 2rem; margin-bottom: 1rem; }
        .intro-content p { color: var(--text-body); font-size: 1.05rem; line-height: 1.8; }
        .intro-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.2rem;
            margin-top: 2rem;
        }
        .stat-item {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            padding: 1.2rem 0.8rem;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .stat-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .stat-item .num { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
        .stat-item .label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.2rem; }
        .intro-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); width: 100%; object-fit: cover; height: 340px; }

        /* ===== 登录步骤 ===== */
        .steps-bg { background: var(--bg-light); }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.8rem;
            margin-top: 1rem;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 1rem;
            transition: background var(--transition), color var(--transition);
        }
        .step-card:hover .step-number { background: var(--primary); color: #fff; }
        .step-card h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
        .step-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }
        .step-arrow {
            position: absolute;
            right: -1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--border-light);
            font-size: 1.5rem;
        }
        .steps-grid .step-card:last-child .step-arrow { display: none; }

        /* ===== 功能特色 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.8rem;
            margin-top: 1rem;
        }
        .feature-card {
            display: flex;
            gap: 1.2rem;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 1.6rem 1.8rem;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            align-items: flex-start;
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .feature-icon {
            flex-shrink: 0;
            width: 54px;
            height: 54px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
        }
        .feature-card h4 { font-size: 1.05rem; margin-bottom: 0.3rem; }
        .feature-card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; line-height: 1.6; }

        /* ===== FAQ ===== */
        .faq-bg { background: var(--bg-light); }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 0;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 1.8rem;
            font-weight: 600;
            color: var(--text-dark);
            font-size: 1rem;
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
            border: none;
            transition: color var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { transition: transform var(--transition); color: var(--text-muted); font-size: 0.85rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            padding: 0 1.8rem 1.2rem;
            color: var(--text-body);
            line-height: 1.8;
            font-size: 0.95rem;
            display: none;
        }
        .faq-item.active .faq-answer { 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-repeat: no-repeat;
            position: relative;
            padding: 5rem 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,126,140,0.88) 0%, rgba(26,46,60,0.92) 100%);
            z-index: 1;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { color: var(--text-white); font-size: 2.4rem; margin-bottom: 0.8rem; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 560px; margin: 0 auto 2rem; }
        .cta-section .btn-primary {
            background: var(--secondary);
            color: var(--text-dark);
            padding: 0.9rem 3rem;
            font-size: 1.1rem;
            box-shadow: 0 4px 24px rgba(245,166,35,0.35);
        }
        .cta-section .btn-primary:hover { background: #e8991f; transform: translateY(-3px); box-shadow: 0 8px 32px rgba(245,166,35,0.40); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 3.5rem 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .site-footer .footer-brand .logo { color: var(--text-white); margin-bottom: 0.8rem; }
        .site-footer .footer-brand .logo i { color: var(--secondary); }
        .site-footer .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; max-width: 300px; }
        .site-footer h4 { color: var(--text-white); font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
        .site-footer .footer-col { display: flex; flex-direction: column; gap: 0.6rem; }
        .site-footer .footer-col a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .site-footer .footer-col a:hover { color: var(--secondary); }
        .site-footer .footer-col a i { margin-right: 0.4rem; width: 1rem; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .footer-bottom span { font-size: 0.85rem; color: rgba(255,255,255,0.4); }
        .footer-social { display: flex; gap: 0.8rem; }
        .footer-social 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: 1rem;
            transition: background var(--transition), color var(--transition);
        }
        .footer-social a:hover { background: var(--secondary); color: var(--text-dark); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .nav-center { gap: 1.4rem; }
            .search-box { width: 150px; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .step-arrow { display: none; }
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .page-banner { padding: 5rem 0 3.5rem; }
            .page-banner h1 { font-size: 2rem; }
            .page-banner p { font-size: 1rem; }
            .nav-center { display: none; }
            .nav-center.mobile-open { display: flex; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: var(--bg-white); padding: 1.5rem 2rem; border-bottom: 1px solid var(--border-light); box-shadow: var(--shadow-md); gap: 1rem; align-items: flex-start; z-index: 99; }
            .nav-center.mobile-open a { font-size: 1rem; }
            .header-actions .search-box { display: none; }
            .menu-toggle { display: block; }
            .intro-grid { grid-template-columns: 1fr; gap: 2rem; }
            .intro-stats { grid-template-columns: repeat(3, 1fr); gap: 0.8rem; }
            .stat-item .num { font-size: 1.4rem; }
            .steps-grid { grid-template-columns: 1fr; gap: 1.2rem; }
            .features-grid { grid-template-columns: 1fr; gap: 1.2rem; }
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section { padding: 3.5rem 0; }
            .cta-section { padding: 3.5rem 0; }
            .cta-section h2 { font-size: 1.8rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 1.2rem; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.4rem; }
            .page-banner h1 { font-size: 1.6rem; }
            .intro-stats { grid-template-columns: 1fr 1fr; }
            .banner-actions .btn-primary, .banner-actions .btn-secondary { width: 100%; justify-content: center; }
            .feature-card { flex-direction: column; align-items: center; text-align: center; }
            .faq-question { font-size: 0.9rem; padding: 1rem 1.2rem; }
            .faq-answer { padding: 0 1.2rem 1rem; }
        }