.backdrop {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 1);
        display: none; /* 确保覆盖层默认隐藏 */
        z-index: 1000;
        }
        .custom-dialog {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: white;
        padding: 20px;
        border-radius: 5px;
        z-index: 1001;
        width: 80%;
        max-width: 300px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        display: none; /* 确保对话框默认隐藏 */
		text-align: center;
        }
        .custom-dialog img {
        width: 250px;
		padding:25px;
		background-image: url('../img/tzg.jpg');
		background-size: cover;
		margin-bottom:15px;
        height: auto;
        border: none;
        }