.mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

.loading-spinner {
    /* 添加你的加载动画样式 */
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    animation: spin 1s linear infinite;
}

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

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