#lecture1{
	width: 100%;
	height: 330px;
	background-image: url("/img/pc/classbg_01.jpg");
	background-position-x: center;
	background-position-y: bottom;
	background-repeat: no-repeat;
}
#lecture2{
	width: 100%;
	height: 570px;
	background-image: url("/img/pc/classbg_02.jpg");
	background-position-x: center;
	background-repeat: no-repeat;
}
.inner_lecture{
	width: 1050px;
	margin: 0 auto;
	color: #ffffff;
	text-align: center;
	letter-spacing: 0px;
}
.inner_lecture .inner_btn{
	width: 404px;
	/*width: 606px;*/
	height: 70px;
	margin: 0 auto;
}
#lecture1 .inner_lecture .inner_btn > .item{
	width: 200px;
	height: 100%;
	border: 1px solid #ffffff;
	float: left;
	line-height: 25px;
	font-size:17px;
	font-weight: bold;
	cursor: pointer;
	padding-top:20px;
}

#lecture2 .inner_lecture{
	/*height: 450px;*/
	position: relative;
}
#lecture2 .inner_lecture .filter{

}
#lecture2 .inner_lecture .filter p {
		display:inline-block;
		font-size: 20px;
	    padding: 5px 20px;
	    margin: 0 0 50px;
	}

#lecture2 .inner_lecture .video_area{
	margin:1% auto;
	width: 32%;
	height: 310px;
	float: left;
	background-color: transparent;
	position:relative;
}
#lecture2 .inner_lecture .video_area .year {
	padding:8px 10px 5px;
	background:#fff;
	color:#000;
	display:inline-block;
	position: absolute;
	top:-5px;
	left:0;
	z-index:10;
}
#lecture2 .inner_lecture .video_area:nth-child(3n-1){
	margin:1%;
}
#lecture2 .inner_lecture .video_space{
	width: 2%;
	float: left;
	height: 310px;
	background-color: transparent;
}
#lecture2 .inner_lecture .video_area .video_item_img{
	margin: 0 auto;
	width: 330px;
	height: 210px;
	background-color: #000000;
}
#lecture2 .inner_lecture .video_area .video_item_title{
	margin: 0 auto;
	width: 330px;
	height: 100px;
	background-color: #ffffff;
	text-align: left;
	position: relative;
}
#lecture2 .inner_lecture .video_area .video_item_title span{
	font-size: 17px;
	color: #333333;
	padding-top: 28px;
	padding-right: 27px;
	padding-left: 27px;
	position: absolute;
	line-height: 23px;
}
#lecture2 .inner_lecture .more_btn{
	width: 1050px;
	height: 80px;
	margin-top: 60px;
	clear: both;
	background-color: rgba(0, 0, 0, 0.5);
	position: absolute;
	bottom: 0;
}
#lecture2 .inner_lecture .more_btn img{padding: 32px 0 0 0;}
.color_on{background-color: #ffffff;color: #00489d;}
.color_off{background-color: transparent;color: #ffffff;}
.line_83{line-height: 83px;height: 83px;}
.line_41{line-height: 41px;height: 83px;}
.line_no{line-height: 22px;height: 63px;padding-top: 20px;}
.border_1px{height: 1px;background-color: #e4e4e4;width: 100%;}
.border_6px{height: 6px;background-color: #e4e4e4;width: 1050px;margin: 0 auto;}