.ns1901 {
	margin: -15px 0 -20px;
}
.ns1901 > .banner {
	width: 100%;
	min-width: 1150px;
	height: 499px; 
	background: url('images/banner.png') no-repeat center center;
}
.ns1901 > .part1 {
	width: 1150px;
	height: 1320px;
	margin: 25px auto;
	background: url('images/part1.png') no-repeat center center;
}
.ns1901 > .part2 {
	width: 1150px;
	height: 233px;
	margin: auto;
}
.ns1901 > .part2 > .content {
	width: 1089px;
	height: 233px;	
	background: url('images/part2.png') no-repeat center center;
}
.ns1901 > .part3 {
	width: 1150px;
	margin: auto;
}
.ns1901 > .part3 > .title {
	width: 826px;
	height: 45px;	
	margin: 45px auto;
	background: url('images/title.png') no-repeat center center;
}
.ns1901 > .part3 > .content {
	width: 1150px;
	margin-bottom: 60px;
}
.ns1901 > .part3 .v1,.v2 {
	width: 571px;
	height: 325px;
	float: left;
	cursor: pointer;
}
.ns1901 > .video {
	width: 571px;
	height: 325px;
	position: absolute;
	left: 0;
	top: 0;
	z-index: 1;
	display: none;
}
.ns1901 > .video .close {
	color: #298ADC;
	font-size: 30px;
	float: right;
	cursor: pointer;
}