#tree {
    padding: 100px 0;
    list-style-type: none;
    background: linear-gradient(90deg,#F80 0%,#F50 100%);
}

.collapsed > ul {
    display: none;
}

#tree li{
    padding-left: 10px;
    cursor: pointer;
    margin-left: 80px;
    border-left: 1px solid #eee;
    padding-bottom: 10px;
    color: #fff;
}
#tree li:hover{
    color: #000;
}

#tree li a {
    color: #fff;
}
#tree li a:hover{
    color: #000;
}
#tree li:before{
    display: inline-block;
    width: 20px;
    height: 1px;
    background-color: #eee;
}
#tree li a:after{
    display: inline-block;
    width: 20px;
    height: 1px;
    background-color: #eee;
}