.ht-base-tree {
  &.ht-base-tree-show-line{
    ul{
      position: relative;
      &:not(:last-child):before{
        content: ' ';
        width: 1px;
        border-left: 1px solid @border-color-split;
        height: 70%;
        position: absolute;
        left: 39px;
        top: 50%;
        transform: translateY(-50%);
        margin: 13px 0;
      }
    }
  }
}
