.go-Top {
	position: fixed;/*返回顶部图标位置与大小调节*/
	bottom: 74px;
	right: 12px;
	width: 42px;
	z-index: 999;
	display: none;
}
#pageTop {
	width: 42px;/*返回顶部图片选择*/
	height: 42px;
	border-radius: 50%;
	background: url(../img/arrow1.png) no-repeat 0 0 ;
	background-size: 42px auto;
	display: block;
}