.lanmu li {
	border-bottom: 1px dotted #ddd;
}
.lanmu li:last-child {
	border-bottom: 0;
}
.lanmu li>a {
	display: block;
	line-height: 44px;
	padding: 0 0 0 25px;
}
.lanmu li .arr {
	float: right;
	height: 45px;
	width: 40px;
	position: relative;
	cursor: pointer;
}
.lanmu li .arr:after {
	content: '';
	border-top: 2px solid #ccc;
	border-left: 2px solid #ccc;
	box-sizing: content-box;
	display: block;
	width: 8px;
	height: 8px;
	margin: auto;
	position: absolute;
	top: 0;
	bottom: 0;
	-webkit-transform: rotate(135deg);
	transform: rotate(135deg);
	right: 15px;
}
.lanmu-box {
	display: none;
}
.lanmu-box p {
	margin: 0;
	border-top: 1px dotted #ddd;
	padding-left: 15px;
}
.lanmu-box p a {
	padding: 0 25px;
	display: block;
	line-height: 40px;
}
.lanmu-box p.on a {
	color: #dd0000;
}
.lanmu li>a:hover, .lanmu li.active>a {
	color: #dd0000;
}
.lanmu li.open .lanmu-box {
	display: block;
}
.lanmu li.open .arr:after {
	-webkit-transform: rotate(225deg);
	transform: rotate(225deg);
}