*{
	margin:0;
	padding:0;
}
#dnaWrap{
	max-width:7.5rem;
	height:100vh;
	position:relative;
	overflow-y: auto;
	margin:0 auto 0;
}
.logo{
	display:block;
	width:2rem;
	margin:.16rem 0 .16rem .32rem;
}
.big{
	width:100%;
	height:9.04rem;
	background:url(../images/bg.png) no-repeat center;
	background-size:cover;
	position:relative;
}
.bg{
	display:block;
	width:100%;
	margin-bottom:2.3rem;
}
.tit{
	display:block;
	width:5.56rem;
	margin:0 auto 0;
}
.down{
	display:block;
	width:3.3rem;
	height:.72rem;
	background:#3E3938;
	border-radius:0.08rem;
	margin:0.48rem auto 0;
	font-size:.32rem;
	color:#fff;
	line-height:.72rem;
	font-weight:500;
	text-align: center;
	text-decoration: none;
	font-family:SimHei , "黑体";
}
.footer{
	width:100%;
	background:#f2f2f2;
	position:relative;
	padding:.4rem 0 .46rem 0;
	margin-top:1.14rem;
}
.hero-chengg{
	width:100%;
	height:1px;
}
.footer p{
	font-size:.24rem;
	color:#938f8f;
	text-align:center;
	line-height:.3rem;
	font-family:SimHei , "黑体";
}
.box{
	width:100%;
	position:relative;
	margin-top:55vh;
}