.wallgal *{ margin:0px; padding:0px; vertical-align:middle;}

.wallgal .pic{ position:relative; display:inline-block; overflow:hidden; box-sizing:border-box; }
.wallgal .pic img{ width:100%; height:auto; visibility:hidden;}
.wallgal .pic .bg{ background-position:center center; background-size:cover; background-repeat:no-repeat; position:absolute; top:0px; bottom:0px; left:0px; right:0px; }
	
.wallgal.s .pic a{}
	
.wallgal.m .pic img{}
	
.wallgal.l .pic img{}