/* 加载动画样式 */
    #loadingOverlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color:#fff;
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 1000;
        display: none;
    }

    .loadingSpinner {
        border: 5px solid #f3f3f3;
        /* Light grey */
        border-top: 5px solid #3498db;
        /* Blue */
        border-radius: 50%;
        width: 50px;
        height: 50px;
        animation: spin 2s linear infinite;
    }

    @keyframes spin {
        0% {
            transform: rotate(0deg);
        }

        100% {
            transform: rotate(360deg);
        }
    }