.common-loading {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.loading_box {
    position: absolute;
    left: calc(50% - 50px);
    top: calc(50% - 50px);
}

.loading_text {
    position: absolute;
    left: 0;
    top: calc(50% + 50px);
    line-height: 40px;
    text-align: center;
    color: #ffffff;
    font-size: 14px;
    width: 100%;
}

.mask {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.2);
}