.click_bigimg{
    cursor: pointer;
    position: relative;
    width: 650px;
}
.black-bg{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: table-cell;
    text-align: center;
    z-index: 999999;
    background: rgba(0,0,0,0.2);
}
.bg-img{
    margin: 0 auto;
    /* margin-top:100px ; */
}
.close{
    cursor: pointer;
    width: 39px;
    height: 39px;
    position: absolute;
    right: -35px;
    top: -60px;
    z-index: 999999;
    background: url('../images/guanb.png');
}