.header{
	width: 100%;
	height: 500px;
}
.nav_ul li a {
    font-size: 16px;
    color: #fff;
}
.lianxi_span{
	color: #fff;
}
.lianxi_num{
	color: #fff;
}
.nav{
	background-color: rgba(0,0,0,0.3);
}

.lianxi{
	border-left-color: rgba(255,255,255,0.2);
}
.nav_ul{
	margin-left: 260px;
}

.header_con{
	width: 1200px;
	margin:0px auto;
}
.header_item1{
	padding-top: 115px;
}
.header_span2 .span1{
	font-size: 50px;
	color: #ffffff;
}
.header_span2 .span2{
	font-size: 30px;
	color: #ffffff;
	margin-top: 10px;
	margin-left: 20px;
}
.header_span2 .span3{
	width: 100px;
	height: 1px;
	background-color: #fff;
	margin-left: 20px;
	margin-top: 30px;
}
.header_span2{
	margin-top: 35px;
}
.header_span4{
	margin-top: 35px;
	max-width: 550px;
	font-size: 14.19px;
	color: #ffffff;
	line-height: 1.8;
}
.header_item2{
	margin-top: 275px;
}
.header_span5{
	font-size: 14.19px;
	color: #ffffff;
}
.viedo{
	/* position: fixed;
	left: 0;
	top: 0; */
	width: 100%;
	height: 100vh;
	z-index: -1;
}
.video_mengban{
	width: 100%;
	height: 100vh;
	position: absolute;
	left: 0;
	top: 0;
	z-index: 10;
	background-color: rgba(0,0,0,0.5);
}
.video_text{
	position: absolute;
	left: 0;
	top: 50%;
	margin:0px auto;
	text-align: center;
	width: 100%;
	z-index: 20;
	height: 150px;
	margin-top: -75px;
}
.video_span{
	font-size: 80px;
	color: #ffffff;
	font-weight: normal!important;
	line-height: 106px;
	height: 106px;
}
.video_span span{
	font-size: 80px;
	color: #fff;
	display: inline-block;
	width: 20px;
	font-weight: normal!important;
}
.video_xian{
	width: 128px;
	height: 1px;
	background-color: #fff;
}
.video_ul{
	position: relative;
	width: auto;
	margin:0px auto;
	margin-top: 35px;
	display: inline-block;
}
.video_span2{
	text-align: center;
	font-size: 16px;
	color: #fff;
	margin:0px 20px;
}
.video_xian{
	margin-top: 10px;
}