.case_wrap{
	padding-left: 6%;
	width: 95.3125%;
}

.case_item{ width:46.875%; float: left; position: relative; padding-top: 34.84375%; 
background: url("../images2/anli/case_bg.jpg") no-repeat;
background-size: 100% 100%; 
float: left;
}
.case_item a{  }

.case_item  img{ width: 85%; height: 81.6%; display: block; position: absolute; left: 3.67%; top: 5%; }