*{margin:0 auto;padding:0;box-sizing:border-box;font-weight: normal;}
html,
body{font-family:"Microsoft YaHei",Helvetica,Tahoma,Arial,sans-serif;
    overflow-x:hidden;
    text-align: center;
   }
 a{
 	text-decoration: none;
 }
.top{
	position: relative;
	height:80px;
	width:1170px;
}
.top>img{
	float: left;
	display: inline-block;
	vertical-align: middle;
	margin-top: 16px;
}
.top>div{
	float: right;

}
.top>div>span{
	line-height:80px;
	font-size:20px;
	color:#333;
}
.top>div>img{
	vertical-align: middle;
	margin-left: 80px;
	margin-right: 15px;
	margin-top: -5px;
}
.banner{
	position: relative;
	
}
.banner>img{
	width:100%;
	display: block;
}
.content{
	position: relative;
	width:1170px;
	padding:30px 0px;
}
.content>div{
	position: relative;
	padding-top: 30px;
}
.content>div>img{
	margin-bottom: 40px;
}
.content>div>div{
	position: relative;
	display: table;
	width:1170px;
	background: #fff;
}
.content>div>div .lesson{
	width:356px;
	height:340px;
	float: left;
	position: relative;
	margin-right: 50px;
	margin-bottom: 30px;
	transition: all .2s;
	box-shadow: 0px 11px 16px rgba(153,153,153,.25);
}
.content>div>div .lesson:hover{
	box-shadow: 0px 3px 16px rgba(153,153,153,.25);
}
.content>div>div>a:nth-child(3n)>div{
	margin-right: 0px;
}
.content>div>div .lesson>img{
	width:100%;
}
.content>div>div .lesson>h3{
	font-size: 20px;
	 overflow: hidden;/*超出部分隐藏*/
            white-space: nowrap;/*不换行*/
            text-overflow:ellipsis;
	color:#333!important;
	text-align: left;
	padding:20px 25px 20px;
}
.content>div>div .lesson>p{
	font-size: 16px;
	color:#bdbdbd;
	text-decoration: line-through;
	text-align: left;
	padding-left:25px;
}
.content>div>div .lesson>span{
	font-size: 26px;
	color:#ff811a;
	position: absolute;
	right:25px;
	bottom:20px;
}
.world{
	position: relative;
	width:100%;
	height:240px;
	padding-top: 50px;
	background: url(../img/footbg.png) no-repeat;
	background-size: 100% auto;
}
.world>h3{
	font-size: 40px;
	color:#fff;
	margin-bottom: 20px;
}
.world>h4{
	font-size: 30px;
	color:#fff;
	font-weight: bold;
}
.butt{
	display: block;
	width:220px;
	height:62px;
	line-height: 60px;
	border-radius: 5px;
	background: #fc4032;
	font-size: 24px;
	color:#fff;
	margin-top: 40px;
}
.guding{
	position: fixed;
	top:17%;
	right:2%;
	width:140px;
	padding-top: 65px;
	height:287px;
	background:url(../img/navbg.png);
	background-size: 100% 100%;
}
.guding>a{
	display: block;
	color:#fff;
	font-size: 16px;
	width:92px;
	padding:8px 0px;
	border-bottom:1px solid #fff;
}
.guding .active{
	color:#2776ab;
	font-weight: bold;
	
}