.tree ul, .tree ol {
	padding: 0;
	margin: 0;
}
.tree ul ul, .tree ul ol, .tree ol ol, .tree ol ul {
	margin-bottom: 0;
}
.tree li {
	line-height: 20px;
    list-style-type:none;
    margin:0 0 0 25px;
    padding:10px 5px 0 5px;
    position:relative;
}
.tree li::before, .tree li::after {
    content:'';
    left:-20px;
    position:absolute;
    right:auto;
}
.tree li::before {
    border-left:1px solid #999;
    bottom:50px;
    height:100%;
    top:0;
    width:1px;
}
.tree li::after {
    border-top:1px solid #999;
    height:20px;
    top:23px;
    width:25px;
}
.tree li span {
    -moz-border-radius:5px;
    -webkit-border-radius:5px;
    border:1px solid #999;
    border-radius:5px;
    display:inline-block;
    padding:3px 8px;
    text-decoration:none;
	cursor:pointer;
}
.tree li.parent_li>span {
    cursor:pointer;
}
.tree>ul>li::before, .tree>ul>li::after {
    border:0;
}
.tree li:last-child::before {
    height:23px;
}
.tree li span:hover, .tree li.parent_li>span:hover, .tree li.parent_li>span:hover+ul li span {
	background: #eee;
    color:#000;
}