* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100%;
            overflow-x: hidden;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: white;
            padding: 2.5rem 0;
            border-bottom: 5px solid #00d2d3;
        }
        
        .header-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        
        h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            background: linear-gradient(to right, #00d2d3, #00b8a9);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1.2;
        }
        
        .subtitle {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            color: #e0e0e0;
        }
        
        .download-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            margin-top: 1.5rem;
        }
        
        .download-btn {
            display: flex;
            align-items: center;
            background: linear-gradient(to right, #00b8a9, #00d2d3);
            color: white;
            padding: 15px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 210, 211, 0.3);
        }
        
        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 210, 211, 0.4);
        }
        
        .download-btn i {
            font-size: 1.5rem;
            margin-right: 10px;
        }
        
        .android-btn {
            background: linear-gradient(to right, #3cba92, #0ba360);
            box-shadow: 0 4px 15px rgba(11, 163, 96, 0.3);
        }
        
        .android-btn:hover {
            box-shadow: 0 6px 20px rgba(11, 163, 96, 0.4);
        }
        
        /* 主要内容区域 */
        main {
            padding: 4rem 0;
        }
        
        section {
            margin-bottom: 4rem;
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
        }
        
        h2 {
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            color: #1a1a2e;
            position: relative;
            padding-bottom: 10px;
        }
        
        h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: linear-gradient(to right, #00d2d3, #00b8a9);
            border-radius: 2px;
        }
        
        h3 {
            font-size: 1.6rem;
            margin: 1.8rem 0 1rem;
            color: #16213e;
        }
        
        p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
            color: #444;
        }
        
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        
        li {
            margin-bottom: 0.8rem;
            font-size: 1.1rem;
        }
        
        /* 特性卡片 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 25px;
            margin-top: 2rem;
        }
        
        .feature-card {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 1.8rem;
            border-left: 5px solid #00d2d3;
            transition: transform 0.3s ease;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
        }
        
        .feature-card h3 {
            color: #1a1a2e;
            margin-top: 0;
            font-size: 1.4rem;
        }
        
        .feature-icon {
            font-size: 2.2rem;
            color: #00d2d3;
            margin-bottom: 15px;
        }
        
        /* 下载步骤 */
        .steps-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-top: 2.5rem;
        }
        
        .step {
            flex: 1;
            min-width: 250px;
            margin: 0 10px 30px;
            text-align: center;
            padding: 2rem 1.5rem;
            background: #f8f9fa;
            border-radius: 12px;
        }
        
        .step-number {
            display: inline-block;
            width: 50px;
            height: 50px;
            background: linear-gradient(to right, #00d2d3, #00b8a9);
            color: white;
            border-radius: 50%;
            line-height: 50px;
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 20px;
        }
        
        .qr-container {
            text-align: center;
            margin: 2rem 0;
            padding: 1.5rem;
            background: #f8f9fa;
            border-radius: 12px;
        }
        
        .qr-code {
            width: 180px;
            height: 180px;
            margin: 0 auto 1rem;
            background: #f0f0f0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            font-size: 0.9rem;
            color: #666;
        }
        
        /* FAQ样式 */
        .faq-item {
            margin-bottom: 1.5rem;
            border-bottom: 1px solid #eee;
            padding-bottom: 1.5rem;
        }
        
        .faq-question {
            font-size: 1.3rem;
            font-weight: 600;
            color: #1a1a2e;
            margin-bottom: 0.8rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-question:after {
            content: '+';
            font-size: 1.5rem;
            color: #00d2d3;
            transition: transform 0.3s ease;
        }
        
        .faq-item.active .faq-question:after {
            transform: rotate(45deg);
        }
        
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            color: #555;
            font-size: 1.1rem;
            line-height: 1.6;
        }
        
        .faq-item.active .faq-answer {
            max-height: 500px;
        }
        
        /* 页脚样式 */
        footer {
            background: #1a1a2e;
            color: white;
            padding: 3rem 0;
            text-align: center;
        }
        
        .footer-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 25px;
            margin: 2rem 0;
        }
        
        .footer-links a {
            color: #e0e0e0;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .footer-links a:hover {
            color: #00d2d3;
        }
        
        .copyright {
            color: #aaa;
            font-size: 0.9rem;
            margin-top: 2rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            
            h2 {
                font-size: 1.8rem;
            }
            
            section {
                padding: 1.8rem;
            }
            
            .download-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .download-btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .steps-container {
                flex-direction: column;
            }
            
            .step {
                margin: 0 0 20px;
            }
        }