@media only screen and (min-width: 1200px) {
#nav{
	width: 1200px;
	height: 120px;
	background: white;
	margin: 0 auto 40px;
}
#box{
	width: 1200px;
	padding-bottom: 20px;
	overflow: hidden;
	margin: auto;
}
.uls{
	width: 1200px;
	overflow: hidden;
	margin:auto;
}
.lis{
	width: 380px;
	height: 303px;
	float: left;
	margin-left: 30px;
	position: relative;
	margin-bottom:  40px;
}
.lis3{
	margin-right: 0;
}
.lis a{
	width: 380px;
	height:303px;
	overflow: hidden;

}

.lis-div{
 	width: 380px;
	height:223px;
	overflow: hidden;
 }
 .lis-div{
 	width: 380px;
	height:223px;
 }
 .lis-div img{
 	width: 100%;
 }
.lis-span{
 	width: 100%;
 	height: 80px;
 	display: block;
 	background: white;
 	text-align: center;
 	line-height: 80px;
 	color: #A6A6A6;
 	font-size: 18px;
 }

.zhezhao{
	width: 380px;
	height:223px;
	background: rgba(0,0,0,0.5);
	position: absolute;
	top: 0;
	left: 0;
	z-index: 9;
	display: none;
}
.zhezhao img{
	width: 80px;
	height: 80px;
	display: block;
	margin: 71px auto;
}
.lis:hover .lis-span{
	background: #333;
	color: white;
}
.lis:hover .zhezhao{
	display: block;
}
#tab{
	margin-top: 60px;
}
}
@media only screen and (min-width: 768px) and (max-width: 1200px) {

#box{
	width: 100%;
	padding-bottom: 20px;
	overflow: hidden;
	margin: auto;
}
.uls{
	width: 100%;
	overflow: hidden;
	margin:auto;
}
.lis{
	width:31%;
	float: left;
	margin-bottom: 20px;
	margin-left: 1%;
	margin-right: 1%;
	position: relative;
}
.lis a{
	width: 100%;
	height:100%;
	overflow: hidden;
}

.lis-div{
 	width: 100%;
	height:100%;
	overflow: hidden;
 }
 .lis-div img{
 	width: 100%;
 }
.lis-span{
 	width: 100%;
 	height: 40px;
 	display: table;
 	background: white;
 	text-align: center;
 	line-height: 40px;
 	color: #A6A6A6;
 	font-size: 16px;
 }

.zhezhao{
	width: 100%;
	height:100%;
	background: rgba(0,0,0,0.5);
	position: absolute;
	top: 0;
	left: 0;
	z-index: 9;
	display: none;
}
.zhezhao img{
	width: 60px;
	height: 60px;
	display: block;
	margin: 30% auto;
}
.lis:hover .lis-span{
	background: #333;
	color: white;
}
.lis:hover .zhezhao{
	display: block;
}
#tab{
	margin-top: 60px;
}
}
@media only screen and (max-width: 768px) {
	#box{
	width: 100%;
	padding-bottom: 20px;
	overflow: hidden;
	margin: auto;
}
.uls{
	width: 100%;
	overflow: hidden;
	margin:auto;
}
.lis{
	width:48%;
	float: left;
	margin-bottom: 20px;
	margin-left: 1%;
	margin-right: 1%;
	position: relative;
}
.lis a{
	width: 100%;
	height:100%;
	overflow: hidden;
}

.lis-div{
 	width: 100%;
	height:100%;
	overflow: hidden;
 }
 .lis-div img{
 	width: 100%;
 }
.lis-span{
 	width: 100%;
 	height: 40px;
 	display: table;
 	background: white;
 	text-align: center;
 	line-height: 40px;
 	color: #A6A6A6;
 	font-size: 16px;
 }

.zhezhao{
	width: 100%;
	height:100%;
	background: rgba(0,0,0,0.5);
	position: absolute;
	top: 0;
	left: 0;
	z-index: 9;
	display: none;
}
.zhezhao img{
	width: 60px;
	height: 60px;
	display: block;
	margin: 30% auto;
}
.lis:hover .lis-span{
	background: #333;
	color: white;
}
.lis:hover .zhezhao{
	display: block;
}
#tab{
	margin-top: 60px;
}
}