.sb{
	display: block;
	width:100%;
	margin-top: 10px;
	margin-bottom: 15px;
}
.sb:after {
	content: "";
	clear:both;
	display: block;
}

.fb, .tw, .gp, .hb{
	float:right;
	position: relative;
}
.fb {
	margin-right:10px;
	z-index: 0;
}
.tw {
	margin-right:10px;
	z-index: 1;
}
.gp {
	margin-right:-17px;
	z-index: 2;
}
.hb {
	z-index: 3;
}