* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }

        a:link,
a:visited,
a:hover,
a:active {
  color: #fff;
}
        
        body {
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            background-image: url('./bg.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
        }
        
        /* 顶部导航栏 - 半透明效果 */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
            background-color: rgba(#070B18, 0.4);
            color: white;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(5px);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .logo {
            font-size: 1.5rem;
            font-weight: bold;
        }
        
        .contact-btn {
            padding: 8px 15px;
            color: #5BA9D6;
            background-color: rgba(0,0,0,0);
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        /* 弹出框样式 */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 200;
            justify-content: center;
            align-items: center;
        }
        
        .modal-content {
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            width: 90%;
            max-width: 400px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }
        
        .close-btn {
            float: right;
            font-size: 1.5rem;
            cursor: pointer;
            color: #7f8c8d;
        }
        
        .close-btn:hover {
            color: #34495e;
        }
        
        .contact-form {
            margin-top: 20px;
        }
        
        .contact-form input {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #ddd;
            border-radius: 4px;
        }
        
        .submit-btn {
            width: 100%;
            padding: 10px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        .submit-btn:hover {
            background-color: #2980b9;
        }
        
        /* 主要内容区 - 半透明背景 */
        .main-content {
            flex: 1;
            padding: 30px 20px;
            margin: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        /* App介绍区域 */
        .app-intro {
            display: flex;
            align-items: center;
            margin-bottom: 40px;
            
            flex-wrap: wrap;
        }
        
        .app-logo {
            width: 120px;
            height: 120px;
            border-radius: 20px;
            margin-right: 30px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }
        
        .app-info {
            flex: 1;
            min-width: 250px;
        }
        
        .app-name {
            font-size: 2rem;
            color: #E4C759;
            margin-bottom: 10px;
        }
        
        .app-slogan {
            font-size: 1.2rem;
            color: #F5D566;
            margin-bottom: 15px;
            font-weight: bold;
        }
        
        .app-desc {
            line-height: 1.6;
            color: #FFFFFA;
        }
        
        /* 产品列表 - 左图右文 */
        .product-list {
            margin: 40px 0;
        }
        
        .product-item {
            display: flex;
            align-items: center;
            margin-bottom: 30px;
            padding: 20px;
            background-color: rgba(#3A383B, 0.3);
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .product-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .product-image {
            width: 120px;
            height: 120px;
            border-radius: 10px;
            object-fit: cover;
            margin-right: 25px;
        }
        
        .product-content {
            flex: 1;
        }
        
        .product-title {
            font-size: 1.3rem;
            color: #FFDC5B;
            margin-bottom: 10px;
        }
        
        .product-desc {
            line-height: 1.6;
            color: #FFDC5B;
            margin-bottom: 10px;
        }
        
        .product-features {
            color: #FFDC5B;
            font-size: 0.9rem;
        }
        
        /* 下载按钮样式 */
        .download-section {
            text-align: center;
            color: #D1CBC3;
            margin: 50px 0 30px;
        }
        
        .download-btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: #FED849;
            color: #070201;
            text-decoration: none;
            border-radius: 4px;
            font-size: 1.1rem;
            transition: all 0.3s;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        
        .download-btn:hover {
            background-color: #27ae60;
            transform: translateY(-2px);
            box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
        }
        
        /* 底部版权 - 半透明效果 */
        .footer {
            background-color: rgba(#070B18, 0.7);
            color: white;
            text-align: center;
            padding: 15px;
            font-size: 0.9rem;
            backdrop-filter: blur(5px);
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .header {
                padding: 10px 15px;
            }
            
            .logo {
                font-size: 1.2rem;
            }
            
            .contact-btn {
                padding: 6px 12px;
                font-size: 0.9rem;
            }
            
            .main-content {
                margin: 10px;
                padding: 20px 15px;
            }
            
            .app-intro {
                flex-direction: column;
                text-align: center;
            }
            
            .app-logo {
                margin: 0 0 20px 0;
            }
            
            .product-item {
                flex-direction: column;
                text-align: center;
            }
            
            .product-image {
                margin: 0 0 15px 0;
            }
            
            .download-btn {
                padding: 10px 25px;
                font-size: 1rem;
            }
        }