body{
	margin:0;
	font-family:"微软雅黑";
	}
.top{
	width:100%;
	position:fixed;
	top:0;
	left:0;
	right:0;
	z-index:10;
	box-shadow:5px 2px 6px #000;}
.bottom{
	margin:0;
	width: 100%;
	min-width:62.5em;
	margin-top:2em;
}
.con_intro{
	height:81.4em;
}
.case1{
	width:49.6%;
	height:25em;
	float:left;
	margin:2px;
	z-index: 2;
	overflow:hidden;
}
.case1 img{
  transition:all 1s;
}
.case1_font{
	width:93%;
	height:4em;
	position:relative;
	z-index: 4;
	color: #FFF;
	padding-top:20.5em;
	padding-left:2em;
	margin-top:-24.5em;
}
.case1_top{
	width:100%;
	height:18em;
	position:relative;
	z-index:5;
	margin-top:-25.25em;
	padding-top:7em;
	text-align: center;
	color: #FFF;
	//display:none;
	opacity:0;
	cursor: pointer;
	background-color:rgba(255,158,53,0.9);
	transition:all 1s linear;
}
.case1_top span{
	color: #FFF;
	font-size:4em;
}
.case1_top p{
	padding-left:10%;
	padding-right:10%;
	font-size:0.8em;
}



@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;
	}