* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        
        :root {
            --primary: #0066b3;
            --primary-dark: #004d8c;
            --secondary: #f8b500;
            --light: #f8f9fa;
            --dark: #333;
            --gray: #6c757d;
            --success: #28a745;
        }
        
        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 20px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .header-content {
            position: relative;
            z-index: 2;
        }
        
        .logo {
            font-size: 28px;
            font-weight: bold;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .logo-icon {
            margin-right: 10px;
            font-size: 32px;
        }
        
        .tagline {
            font-size: 18px;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 20px;
        }
        
        .cta-button {
            display: inline-block;
            background-color: var(--secondary);
            color: var(--dark);
            padding: 12px 30px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: bold;
            margin-top: 15px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }
        
        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
            background-color: #ffc107;
        }
        
        .header-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.1;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" fill="white"><path d="M20,20 L80,20 L80,80 L20,80 Z" stroke-width="2"/><circle cx="50" cy="50" r="15"/></svg>');
            background-size: 200px;
        }
        
        /* 主要内容区域 */
        section {
            padding: 60px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 40px;
            font-size: 32px;
            color: var(--primary-dark);
            position: relative;
        }
        
        .section-title:after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background: var(--primary);
            margin: 15px auto;
            border-radius: 2px;
        }
        
        .section-subtitle {
            text-align: center;
            color: var(--gray);
            max-width: 700px;
            margin: 0 auto 40px;
            font-size: 18px;
        }
        
        /* 图标样式 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        
        .feature-card {
            background: white;
            border-radius: 12px;
            padding: 30px 25px;
            text-align: center;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .feature-card:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        
        .icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 36px;
            box-shadow: 0 5px 15px rgba(0, 102, 179, 0.3);
        }
        
        .feature-title {
            font-size: 22px;
            margin-bottom: 15px;
            color: var(--primary-dark);
        }
        
        .feature-description {
            color: var(--gray);
            font-size: 16px;
        }
        
        /* 底部样式 */
        footer {
            background-color: #1a1a1a;
            color: #ccc;
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-section h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-section h3:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 3px;
            background: var(--primary);
        }
        
        .footer-section p, .footer-section a {
            color: #aaa;
            margin-bottom: 12px;
            line-height: 1.8;
        }
        
        .footer-section a {
            text-decoration: none;
            transition: color 0.3s;
            display: block;
        }
        
        .footer-section a:hover {
            color: var(--primary);
        }
        
        .social-icons {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #333;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .social-icon:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #333;
            font-size: 14px;
            color: #888;
        }
        
        /* 免责声明和隐私条款 */
        .legal-section {
            background: #222;
            padding: 30px 0;
        }
        
        .legal-container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .legal-title {
            color: white;
            font-size: 20px;
            margin-bottom: 15px;
            cursor: pointer;
            display: flex;
            align-items: center;
            transition: color 0.3s;
        }
        
        .legal-title:hover {
            color: var(--primary);
        }
        
        .legal-title:after {
            content: '+';
            margin-left: auto;
            font-size: 24px;
            transition: transform 0.3s;
        }
        
        .legal-title.active:after {
            transform: rotate(45deg);
        }
        
        .legal-content {
            display: none;
            background: #2a2a2a;
            padding: 25px;
            border-radius: 8px;
            margin-top: 15px;
            color: #ccc;
            line-height: 1.8;
        }
        
        .legal-content.active {
            display: block;
        }
        
        .legal-content h4 {
            color: white;
            margin: 20px 0 10px;
            font-size: 18px;
        }
        
        .legal-content ul {
            padding-left: 20px;
            margin-bottom: 15px;
        }
        
        .legal-content li {
            margin-bottom: 8px;
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .section-title {
                font-size: 26px;
            }
            
            .feature-card {
                padding: 25px 20px;
            }
            
            .icon {
                width: 70px;
                height: 70px;
                font-size: 30px;
            }
            
            .feature-title {
                font-size: 20px;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        
        @media (max-width: 480px) {
            .logo {
                font-size: 24px;
            }
            
            .tagline {
                font-size: 16px;
            }
            
            .section-title {
                font-size: 22px;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
        }