#cate_670 {
	float:left;
	height: auto;
	width: 660px;
	padding-bottom:100px;
	margin-left:2px;
}
#cate_250 {
	width:250px;
	float:right;
	height:auto;
	margin-right:2px;
}
:root #cate_250 {
	width:250px;
	float:right;
	height: auto;
}