.ercenter {
	width: 1400px;
	margin: 54px auto;
	margin-bottom: 60px;
}
.topber img{
	width: 100%;
}
.ercenter h1{
	font-size: 36px;
	line-height: 100px;
	font-weight: 500;
}


.nav_1 {
	overflow: hidden;
	background: #F5F5F5;
	box-sizing: border-box;
	
	
}
.nav_1 li {
	float: left;
	width: 9.7%;
	text-align: center;
	line-height: 50px;
	margin-left: 3%;
}
.nav_1 li:nth-child(1) {
	margin-left: 0;
}
.nav_1 li a {
	font-size: 18px;
	font-weight: bold;
	color: #333;
}