.wrap{
	background: #f5f5f5;
}
header{
	width: 640px;
	height: 101px;
	border-bottom: 1px solid #eee;
	position: fixed;
	background: #fff;
	z-index: 111;
}
header>div{
	font-size: 34px;
	line-height: 100px;
}
.back{
	height: 100px;
	position: absolute;
	left: 20px;
}

section{
	padding-top: 121px;
}
section ul{
	background: #fff;
}
.left_cont{
	width: 70px;
	padding-left: 20px;
	padding-top: 33px;
}
.right_cont{
	width: 570px;
	border-bottom: 1px solid #eee;
}
.sub{
	position: fixed;
	left: 20px;
	bottom: 20px;
	width: 600px;
	height: 100px;
	font-size: 28px;
	color: #fff;
	background: #de2634;
	border-radius: 5px;
	outline: 0;
	border: 0;
}