:root {
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --secondary: #db2777;
            --accent: #7c3aed;
            --dark: #0f172a;
            --light-bg: #f8fafc;
            --card-bg: #ffffff;
            --text-main: #334155;
            --border-color: #e2e8f0;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light-bg);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: var(--transition);
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo-container {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-container img {
            height: 40px;
            width: auto;
        }

        .nav-links {
            display: flex;
            gap: 20px;
            align-items: center;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            border: none;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }

        .btn-secondary {
            background: white;
            color: var(--dark);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            background: var(--light-bg);
            border-color: var(--dark);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
        }

        /* Hero 首屏 (无图片) */
        .hero {
            position: relative;
            padding: 160px 0 100px;
            background: radial-gradient(circle at 90% 10%, rgba(219, 39, 119, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 80%, rgba(37, 99, 235, 0.05) 0%, transparent 40%),
                        #ffffff;
            text-align: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-color), transparent);
        }

        .badge-gradient {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            background: linear-gradient(90deg, rgba(37,99,235,0.1), rgba(219,39,119,0.1));
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(37,99,235,0.2);
        }

        .hero h1 {
            font-size: clamp(28px, 5vw, 48px);
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 20px;
            font-weight: 800;
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            max-width: 700px;
            margin: 0 auto 40px;
            font-size: 18px;
            color: var(--text-main);
        }

        .hero-btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            margin-bottom: 60px;
        }

        .hero-features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 40px;
        }

        .hero-feature-card {
            background: var(--card-bg);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .hero-feature-card:hover {
            transform: translateY(-5px);
            border-color: var(--accent);
            box-shadow: 0 10px 20px rgba(124, 58, 237, 0.08);
        }

        .hero-feature-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .hero-feature-card p {
            font-size: 14px;
            color: var(--text-main);
            margin: 0;
        }

        /* 基础 Section */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-main);
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 30px 20px;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 15px rgba(0,0,0,0.05);
        }

        .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-main);
            font-weight: 500;
        }

        /* 平台介绍 & 服务能力卡片 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            border-color: var(--secondary);
        }

        .service-card .icon {
            font-size: 32px;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-main);
        }

        /* 标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .tag-item {
            padding: 8px 16px;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 30px;
            font-size: 14px;
            color: var(--text-main);
            transition: var(--transition);
        }

        .tag-item:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            transform: scale(1.05);
        }

        /* 流程步骤 */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-weight: 700;
        }

        .step-item h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-main);
        }

        /* 对比表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 700px;
        }

        .compare-table th, .compare-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        .compare-table th {
            background-color: var(--light-bg);
            font-weight: 600;
            color: var(--dark);
        }

        .compare-table tr:last-child td {
            border-bottom: none;
        }

        .compare-table tr.highlight {
            background: rgba(37, 99, 235, 0.02);
        }

        .compare-table td.strong {
            font-weight: 700;
            color: var(--primary);
        }

        /* 案例展示 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 24px rgba(0,0,0,0.05);
        }

        .case-img-container {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #eee;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }

        .case-content {
            padding: 20px;
        }

        .case-content h3 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .case-content p {
            font-size: 14px;
            color: var(--text-main);
        }

        /* 评论卡片 */
        .comment-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .comment-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 12px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .comment-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.04);
        }

        .comment-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .comment-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }

        .comment-info h4 {
            font-size: 14px;
            color: var(--dark);
        }

        .comment-info span {
            font-size: 12px;
            color: var(--text-main);
        }

        .comment-body {
            font-size: 13.5px;
            color: var(--text-main);
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-header {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

        .faq-header h3 {
            font-size: 16px;
            color: var(--dark);
            font-weight: 600;
        }

        .faq-icon {
            font-size: 18px;
            transition: var(--transition);
        }

        .faq-content {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            border-top: 0 solid var(--border-color);
            font-size: 14px;
            color: var(--text-main);
            line-height: 1.6;
        }

        .faq-item.active .faq-content {
            padding: 20px;
            max-height: 300px;
            border-top: 1px solid var(--border-color);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }

        /* 表单与需求匹配 */
        .form-section {
            background: #ffffff;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: start;
        }

        .form-wrapper {
            background: var(--light-bg);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: white;
            font-size: 14px;
            color: var(--dark);
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        /* 最新文章 */
        .article-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .article-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
            text-decoration: none;
            color: var(--dark);
        }

        .article-item:hover {
            transform: translateY(-2px);
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        }

        .article-item h3 {
            font-size: 16px;
            margin-bottom: 10px;
            font-weight: 600;
        }

        .article-meta {
            font-size: 12px;
            color: var(--text-main);
        }

        /* 联系方式与二维码 */
        .contact-info-block {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .contact-method {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .contact-method-icon {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }

        .contact-method-detail h4 {
            font-size: 14px;
            color: var(--text-main);
        }

        .contact-method-detail p {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
        }

        .qrcode-container {
            display: flex;
            gap: 30px;
            margin-top: 30px;
        }

        .qrcode-card {
            background: white;
            padding: 15px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            text-align: center;
        }

        .qrcode-card img {
            width: 120px;
            height: 120px;
            margin-bottom: 10px;
            display: block;
        }

        .qrcode-card span {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-main);
        }

        /* 浮动客服 */
        .floating-service {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            color: var(--dark);
            font-size: 20px;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            cursor: pointer;
            position: relative;
        }

        .float-btn:hover {
            background: var(--primary);
            color: white;
            transform: scale(1.05);
        }

        .float-btn .tooltip {
            position: absolute;
            right: 60px;
            background: var(--dark);
            color: white;
            padding: 6px 12px;
            border-radius: 4px;
            font-size: 12px;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }

        .float-btn:hover .tooltip {
            opacity: 1;
            transform: translateX(-5px);
        }

        /* 页脚 */
        footer {
            background: var(--dark);
            color: #94a3b8;
            padding: 60px 0 30px;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo img {
            height: 40px;
            margin-bottom: 15px;
        }

        .footer-col h4 {
            color: white;
            font-size: 16px;
            margin-bottom: 20px;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: white;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .friend-links {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            transition: var(--transition);
        }

        .friend-links a:hover {
            color: white;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .case-grid { grid-template-columns: repeat(2, 1fr); }
            .comment-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-container { grid-template-columns: repeat(2, 1fr); }
            .form-grid { grid-template-columns: 1fr; gap: 40px; }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }

            .nav-links.active {
                display: flex;
            }

            .menu-toggle {
                display: block;
            }

            .stats-grid { grid-template-columns: 1fr; }
            .grid-3 { grid-template-columns: 1fr; }
            .case-grid { grid-template-columns: 1fr; }
            .comment-grid { grid-template-columns: 1fr; }
            .steps-container { grid-template-columns: 1fr; }
            .article-list { grid-template-columns: 1fr; }
            
            .footer-grid {
                grid-template-columns: 1fr;
            }

            .hero h1 {
                font-size: 32px;
            }
        }