@charset "UTF-8";
        /* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
        }
        
        body {
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 导航栏样式 */
        header {
            background-color: white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            transition: padding 0.3s;
        }
        
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            font-weight: bold;
            font-size: 1.2rem;
            color: #3B82F6;
        }
        
        .logo i {
            margin-right: 8px;
            font-size: 1.5rem;
        }
        
        .menu-toggle {
            background: none;
            border: none;
            font-size: 1.5rem;
            color: #666;
            cursor: pointer;
        }
        
        .nav-links {
            display: none;
            list-style: none;
        }
        
        .nav-links li {
            margin-bottom: 10px;
        }
        
        .nav-links a {
            color: #666;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: #3B82F6;
        }
        
        .mobile-menu {
            display: none;
            padding: 15px 0;
            border-top: 1px solid #eee;
        }
        
        .mobile-menu.active {
            display: block;
        }
        
        /* 英雄区域样式 */
        .hero {
            margin-top: 70px;
            padding: 40px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }
        
        .hero-content {
            text-align: center;
        }
        
        .hero h1 {
            font-size: 2rem;
            margin-bottom: 20px;
            color: #333;
        }
        
        .hero h1 span {
            color: #3B82F6;
        }
        
        .hero p {
            font-size: 1rem;
            margin-bottom: 30px;
            color: #666;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .btn {
            display: inline-block;
            padding: 10px 20px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            margin: 0 5px 10px;
        }
        
        .btn-primary {
            background-color: #3B82F6;
            color: white;
        }
        
        .btn-primary:hover {
            background-color: #2563EB;
        }
        
        .btn-secondary {
            background-color: white;
            color: #3B82F6;
            border: 1px solid #3B82F6;
        }
        
        .btn-secondary:hover {
            background-color: #f0f7ff;
        }
        
        .hero-image {
            margin-top: 30px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .hero-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        /* 通用部分样式 */
        section {
            padding: 40px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .section-title h2 {
            font-size: 1.8rem;
            margin-bottom: 15px;
            color: #333;
        }
        
        .section-title p {
            color: #666;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        /* 概述部分样式 */
        .overview {
            background-color: white;
        }
        
        .overview-cards {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        
        .overview-card {
            background-color: #f9f9f9;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        
        .card-icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: rgba(59, 130, 246, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
        }
        
        .card-icon i {
            font-size: 1.5rem;
            color: #3B82F6;
        }
        
        .overview-card h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: #333;
        }
        
        .overview-card p {
            color: #666;
        }
        
        /* 平台介绍部分样式 */
        .platforms {
            background-color: #f5f5f5;
        }
        
        .platform-cards {
            display: grid;
            grid-template-columns: 1fr;
            gap: 25px;
        }
        
        .platform-card {
            background-color: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }
        
        .platform-card:hover {
            transform: translateY(-5px);
        }
        
        .platform-header {
            height: 150px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
        }
        
        .wechat {
            background: linear-gradient(135deg, #07C160 0%, #06b356 100%);
        }
        
        .baidu {
            background: linear-gradient(135deg, #2D82FF 0%, #1a73e8 100%);
        }
        
        .douyin {
            background: linear-gradient(135deg, #FE2C55 0%, #e61e47 100%);
        }
        
        .alipay {
            background: linear-gradient(135deg, #1677FF 0%, #0d6efd 100%);
        }
        
        .platform-content {
            padding: 20px;
        }
        
        .platform-content h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        
        .wechat-title {
            color: #07C160;
        }
        
        .baidu-title {
            color: #2D82FF;
        }
        
        .douyin-title {
            color: #FE2C55;
        }
        
        .alipay-title {
            color: #1677FF;
        }
        
        .platform-content p {
            color: #666;
            margin-bottom: 15px;
        }
        
        .platform-features {
            margin-bottom: 20px;
        }
        
        .platform-features li {
            display: flex;
            align-items: center;
            margin-bottom: 8px;
            color: #666;
        }
        
        .platform-features i {
            margin-right: 8px;
        }
        
        .platform-link {
            color: inherit;
            font-weight: 500;
            text-decoration: none;
        }
        
        .platform-link:hover {
            text-decoration: underline;
        }
        
        /* 对比分析部分样式 */
        .comparison {
            background-color: white;
            overflow-x: auto;
        }
        
        .comparison-table {
            width: 100%;
            min-width: 600px;
            border-collapse: collapse;
            margin-top: 20px;
        }
        
        .comparison-table th,
        .comparison-table td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #eee;
        }
        
        .comparison-table th {
            background-color: #f9f9f9;
            font-weight: 600;
        }
        
        .comparison-table tr:hover {
            background-color: #f9f9f9;
        }
        
        /* 优势特点部分样式 */
        .advantages {
            background-color: #f5f5f5;
        }
        
        .advantages-content {
            margin-top: 30px;
        }
        
        .advantages-image {
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .advantages-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        .advantage-item {
            display: flex;
            margin-bottom: 25px;
        }
        
        .advantage-icon {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: rgba(59, 130, 246, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            flex-shrink: 0;
        }
        
        .advantage-icon i {
            font-size: 1.2rem;
            color: #3B82F6;
        }
        
        .advantage-text h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
            color: #333;
        }
        
        .advantage-text p {
            color: #666;
        }
        
        /* 联系咨询部分样式 */
        .contact {
            background-color: white;
        }
        
        .contact-card {
            background-color: #f9f9f9;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .contact-info {
            background-color: #3B82F6;
            color: white;
            padding: 30px;
        }
        
        .contact-info h2 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }
        
        .contact-details {
            margin-top: 25px;
        }
        
        .contact-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 15px;
        }
        
        .contact-item i {
            margin-right: 10px;
            margin-top: 3px;
        }
        
        .social-links {
            margin-top: 30px;
        }
        
        .social-links h3 {
            margin-bottom: 15px;
            font-size: 1.1rem;
        }
        
        .social-icons {
            display: flex;
            gap: 15px;
        }
        
        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(255,255,255,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: background-color 0.3s;
        }
        
        .social-icon:hover {
            background-color: rgba(255,255,255,0.3);
        }
        
        .contact-form {
            padding: 30px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #333;
        }
        
        .form-control {
            width: 100%;
            padding: 10px 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }
        
        .form-control:focus {
            outline: none;
            border-color: #3B82F6;
            box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
        }
        
        textarea.form-control {
            min-height: 100px;
            resize: vertical;
        }
        
        .submit-btn {
            background-color: #3B82F6;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 5px;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.3s;
            width: 100%;
        }
        
        .submit-btn:hover {
            background-color: #2563EB;
        }
        
        /* 页脚样式 */
        footer {
            background-color: #333;
            color: white;
            padding: 40px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
        }
        
        .footer-column h3 {
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: #fff;
        }
        
        .footer-column p {
            color: #bbb;
            font-size: 0.9rem;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #bbb;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .footer-bottom {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #444;
            text-align: center;
            color: #aaa;
            font-size: 0.8rem;
        }
        
        /* 返回顶部按钮 */
        .back-to-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: #3B82F6;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 999;
        }
        
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        
        /* 响应式样式 */
        @media (min-width: 768px) {
            .menu-toggle {
                display: none;
            }
            
            .nav-links {
                display: flex;
                gap: 20px;
            }
            
            .nav-links li {
                margin-bottom: 0;
            }
            
            .overview-cards {
                grid-template-columns: repeat(3, 1fr);
            }
            
            .platform-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .advantages-content {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 30px;
                align-items: center;
            }
            
            .advantages-image {
                margin-bottom: 0;
            }
            
            .contact-card {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }
            
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (min-width: 992px) {
            .platform-cards {
                grid-template-columns: repeat(4, 1fr);
            }
            
            .footer-content {
                grid-template-columns: repeat(4, 1fr);
            }
            
            .hero {
                padding: 60px 0;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
        }