/* 基础样式 */
        
        /* 模态框背景 */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            overflow: auto;
        }
        
        /* 模态框容器 */
        .modal-container {
            position: absolute;
            background-color: #fefefe;
            margin: auto;
            padding: 20px;
            border: 1px solid #888;
            width: 90%;
            max-width: 350px;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
            animation: fadeIn 0.3s;
        }
        
        @keyframes fadeIn {
            from {opacity: 0; transform: translateY(-20px);}
            to {opacity: 1; transform: translateY(0);}
        }
        
        /* 关闭按钮 */
        .close-btn {
            position: absolute;
            top: 15px;
            right: 20px;
            color: #aaa;
            font-size: 24px;
            font-weight: bold;
            cursor: pointer;
            transition: color 0.3s;
        }
        
        .close-btn:hover {
            color: #000;
        }
        
        /* 内容区域样式 */
        .modal-content {
            text-align: center;
            padding: 10px 0;
        }
        
        .qr-container {
            margin-bottom: 20px;
        }
        
        .qr-image {
            max-width: 100%;
            height: auto;
            border: 1px solid #eee;
            padding: 10px;
            border-radius: 4px;
        }
        
        .download-btn {
            display: inline-block;
            margin: 15px 0;
            padding: 8px 16px;
            background-color: #2196F3;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            transition: background-color 0.3s;
            text-decoration: none;
        }
        
        .download-btn:hover {
            background-color: #0b7dda;
        }
        
        .info-text {
            color: #666;
            font-size: 14px;
            margin-bottom: 20px;
        }
        
        .switch-btn {
            padding: 10px 20px;
            background-color: #ff9800;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            transition: background-color 0.3s;
            margin-top: 10px;
        }
        
        .switch-btn:hover {
            background-color: #e68900;
        }
        
        .download-address {
            display: none;
            padding: 20px;
            background-color: #f5f5f5;
            border-radius: 4px;
            margin: 10px 0;
            word-break: break-all;
        }