.ad_banner_mobile{display:none; margin:0 auto 8px;}
.ad_banner_mobile img{ display:block; margin:auto}


@media only screen and (max-width : 1024px) {
.ad_banner_mobile{display: block;}
}

@media only screen and (max-width : 800px) {
.ad_banner_mobile img{ width:100%; height:auto;}
}