.popupmask {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    background-color: rgba(0, 0, 0, .5);
    display: none;
}

.popupmiddle_box {
    position: fixed;
    width: 1152px;
    height: 648px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 10000;
    cursor: pointer;
}

.popupmiddle_box .close {
    width: 40px;
    height: 40px;
    font-size: 30px;
    text-align: center;
    line-height: 36px;
    position: absolute;
    right: -40px;
    top: -40px;
    color: #fff;
    background-color: rgba(0, 0, 0, .5);
    border-radius: 50%;
    cursor: pointer;
}

#vsb_content img{
    cursor: zoom-in;
}