.con{
	height: auto;
	    overflow: hidden;
}
.con_intro{
	height:100%;
}
.case1{
	width:32.8%;
	height:20em;
        text-shadow:5px 5px 6px green;
}
.case1_top{
	padding-top:12em;
}
.con_intro .info{
	font-size:0.6em;
	line-height:3.5em;
}


@media screen and (max-width:1920px){
.top{
	height:120px;
}
}
@media screen and (max-width:1680px){
	.top{
	height:115px;
	}
}
@media screen and (max-width:1600px){
	.top{
	height:100px;
	}
}
@media screen and (max-width:1440px){
	.top{
	height:90px;
	}
}
@media screen and (max-width:1366px){
	.top{
	height:80px;
	}