*{
	box-sizing: border-box;
	margin: 0;padding: 0;
}
*:before,*:after{
	box-sizing: border-box;
}
ul {list-style-type: none;font-size: 15px;}
ul li span{
    color: #1890ff;
    border: 1px solid #1890ff;
    width: 15px;
    height: 15px;
    display: inline-block;
    text-align: center;
    border-radius: 50%;
    vertical-align: middle;
    margin-right:15px;
    line-height: 12px;
    cursor: default;background: #fff;}




.lefts {
    
	
	height: 100%;
	margin: 0px;
	position: relative;
	
}

.l_tree {
	width: calc(100% - 44px);
	height: 100%;
	padding-left: 22px;
}
.l_tree_branch {
	width: 200px;
	height: 100%;
	display: block;
	padding: 10px;
    position: relative;
    padding:5px 10px;
	color:black;
}

ul.l_tree:before {
	content: '';
    border-left: 1px dotted #999a9c;
    height: calc(100%);
    position: absolute;
    left: 40px;
    top: 20px;
}
.l_tree,.l_tree_branch {
	position: relative;
}

.l_tree_branch::after {
	content: '';
	width: 15px;
	height: 0;
	border-bottom: 1px dotted #999a9c;
	position: absolute;
	right: calc(100% - 40px);
	top: 18px;
}