.bb_heng {
	border-bottom-width: 1px;
	border-bottom-style: solid;
	border-bottom-color: #A8A9AC;
}
.bb_bian {
	border-top-width: 4px;
	border-top-style: solid;
	border-top-color: #A8A9AC;
	border-bottom-width: 4px;
	border-bottom-style: solid;
	border-bottom-color: #A8A9AC;
}