.advertise{
    width: 100%;
    height: 100%;
    position: fixed;
    display: none;
}

.ad_mask{
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
}
.ad_show{
    width: 275px;
    height: 367px;
    border-radius: 12px;
    background:#505050 url(https://app.api.shanhuu.com/shanhuu/app/v1/ad/screen/st1.jpg) no-repeat top center;
    background-size: 100% 100%;

    display: inline-block;
    position: absolute;
    top: 70px;
    left: 50%;
    margin-left: -138px;
}
.ad_close{
    width: 40px;
    height: 40px;
    background: url(/images/closeAd.png) no-repeat top center;
    background-size: 100% 100%;
    display: inline-block;
    position: absolute;
    top: 477px;
    left: 50%;
    margin-left: -20px;
}