#zgg1{ width:100%; position:fixed; left:0px; top:0px; z-index:100001; height:100vh; background-color:rgba(0,0,0,0.5); overflow:hidden;}
#zgg1 img{ display:block; width:100%; min-height:100vh;}
.floadAd { position:fixed;;z-index:100002; display: none; width:300px; }
.floadAd .item { display: block;  }
.floadAd .item img { vertical-align: bottom; width:100%; display:block}