.sub-node-container{
    margin-left: 10px;
}
.before-node{

}
.left-line{
    position: absolute;
    width: 1px;
    height: 100000px;
    border-left: 1px solid red;
}
.node-container{
    overflow: hidden;
    position: relative;
}
.icon{
    width: 10px;
}
.noIcon{
    margin-left: 10px;
}
.tree-icon{
  display: inline-block;
  width: 20px;
  height: 20px;
}