/* 弹窗样式 */
    .modal {
        display: none;
        position: fixed;
        z-index: 1000;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        overflow: auto;
        background-color: rgba(0,0,0,0.4);
    }
    
    .modal-content {
        background-color: #fefefe;
        margin: 15% auto;
        padding: 20px;
        border: 1px solid #888;
        width: 80%;
        max-width: 500px;
        border-radius: 10px;
        text-align: center;
        animation: modalopen 0.5s;
    }
    
    @keyframes modalopen {
        from {opacity: 0; transform: translateY(-30px);}
        to {opacity: 1; transform: translateY(0);}
    }
    
    .close-modal {
        color: #aaa;
        float: right;
        font-size: 28px;
        font-weight: bold;
    }
    
    .close-modal:hover,
    .close-modal:focus {
        color: black;
        text-decoration: none;
        cursor: pointer;
    }
    
    .success-icon {
        color: #4CAF50;
        font-size: 60px;
        margin-bottom: 20px;
    }