.nav_level1 {
	padding: 8px 0;
}

.nav_level2 {
	width: 137px;
	display: none;
	position: absolute;
	left: 136px;
	margin-top: -35px;
}

.nav_content {
	width: 137px;
	height: 35px;
	line-height: 35px;
	font-size: 14px;
	color: #ffffff;
	text-align: center;
}

.nav_content:hover {
	color: #ccc;
}

.nav_level1_backgroud {
	background: rgb(0, 0, 0);
	opacity: 0.4;
	position: absolute;
	top: 105px;
	left: 0px;
	z-index: -1;
	padding: 8px 0;
	width: 137px;
	height: 140px;
}

.nav_level2_backgroud {
	background: rgb(0, 0, 0);
	opacity: 0.4;
	position: absolute;
	left: 0px;
	z-index: -1;
	width: 137px;
	height: 35px;
}