.back-top {
	position:fixed;
	right:20px;
	bottom:20%;
	text-align:center;
	z-index:100
}
.back-top .item {
	display:block;
	width:60px;
	height:60px;
	border:1px solid #ddd;
	border-radius:3px;
	color:#999;
	background-color:#fff;
	line-height:2;
	cursor:pointer
}
.back-top .item .icon {
	display:block;
	width:29px;
	height:29px;
	margin:auto;
	margin-top:7px;
	background-repeat:no-repeat
}
.back-top .item .icon.qq {
	background-image:url(../../images/home/qq.png)
}
.back-top .item .icon.top {
	background-image:url(../../images/home/top.png)
}
.back-top .item:hover {
	color:#1db1fe
}
.back-top .item:hover .icon.qq {
	background-image:url(../../images/home/qq-cover.png)
}
.back-top .item:hover .icon.top {
	background-image:url(../../images/home/top-cover.png)
}
.back-top .item+.item,.back-top .item+.item-group,.back-top .item-group+.item {
	margin-top:9px
}
.back-top .item-group {
	display:block;
	width:60px;
	border:1px solid #ddd;
	border-radius:3px;
	background-color:#fff
}
.back-top .item-group>.item {
	border:none
}
.back-top .item-group .item+.item {
	margin-top:-9px
}