*{
	box-sizing: border-box;
	margin: 0;padding: 0;
}
*:before,*:after{
	box-sizing: border-box;
}
ul,
li {
	list-style: none;
}

.l_tree_container {
	height: 100%;
	margin: 13px;
	position: relative;
}

.l_tree {
	width: calc(100% - 44px);
	height: 100%;
	padding-left: 42px;
}
.l_tree_branch {
	width: 100%;
	height: 100%;
	display: block;
	padding: 13px;
	position: relative;
}

.l_tree_branch .l_tree_children_btn {
	width: 26px;
    height: 26px;
    border-radius: 50%;
    background-color: #2283c1;
    font-size: 23px;
    text-align: center;
    color: #ffffff;
    outline: none;
    border: 0;
    cursor: pointer;
}

ul.l_tree:before {
	content: '';
	border-left: 1px solid #999999;
	height: calc(100%);
	position: absolute;
	left: 10px;
	top: 0px;
}

.l_tree .l_tree_branch:last-child::before {
	content: '';
	width: 3px;
	height: calc(100% - 24px);
	display: block;
	background-color: #ffffff;
	position: absolute;
	bottom: 0;
	left: -34px;
}

.l_tree,
.l_tree_branch {
	position: relative;
}

.l_tree_branch::after {
	content: '';
	width: 40px;
	height: 0;
	border-bottom: 1px solid #000;
	position: absolute;
	right: calc(100% - 9px);
	top: 22px;
}

.l_tree_container>.l_tree::before,
.l_tree_container>.l_tree>.l_tree_branch::after {
	display: none;
}
.l_folder{
    border-radius: 5px;
    border: 3px #096eae solid;
    padding: 2px 10px 2px 10px;
}