/* 模态框样式 */
        .modal {
            display: none; /* 初始隐藏 */
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1000;
        }

        .modal-content {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            width: 80%;
            max-width: 500px;
        }

        .close-btn {
            float: right;
            cursor: pointer;
            font-size: 20px;
            color: red;
        }

        .download-option {
            margin: 15px 0;
            padding: 10px;
            background-color: #f9f9f9;
            border: 1px solid #ddd;
            border-radius: 5px;
        }

        .download-option:hover {
            background-color: #f0f0f0;
        }

        .description {
            font-size: 14px;
            color: #666;
            margin-top: 5px;
        }

        .download-button {
            display: inline-block;
            margin-top: 10px;
            padding: 8px 12px;
            background-color: #007bff;
            color: white;
            text-decoration: none;
            border-radius: 5px;
        }

        .download-button:hover {
            background-color: #0056b3;
        }