body,div,ul,a {
	margin:0;
	padding:0;
}
ul {
	list-style:none;
}
a {
	text-decoration:none;
	color:black;
}
/* 具体样式 */
        .mean_aside {
	width:90px;
	margin-top:5px;
	margin-left:15px;
	background-color:#ccc;
}
.mean_aside ul li {
	position:relative;
	width:90px;
	height:30px;
	line-height:30px;
}
.mean_aside ul li a {
	display:block;
	height:30px;
	line-height:30px;
	text-align:center;
}
.mean_aside ul li ul {
	display:none;
}
.mean_aside ul li:hover {
	background-color:#008fc3;
}
.mean_aside ul li:hover ul {
	display:block;
	position:absolute;
	left:90px;
	background-color:#008fc3;
	width:100px;
}
.mean_aside ul li:nth-child(2) ul {
	top:-30px;
}
.mean_aside ul li:nth-child(3) ul {
	top:-60px;
}
.mean_aside ul li:nth-child(4) ul {
	top:-90px;
}
.mean_aside ul li ul li:hover a {
	color:#f3d;
}