@charset "utf-8";
.dn{
	display:none;
}
.db{
	display:block;
}
/*清除浮动*/
.clearfloat:after {
	content: "020";
	display: block;
	height: 0;
	clear: both;
	visibility: hidden;
}
.clearfloat {
	zoom: 1;
}