slble-attend/sl.ble_sys-attend/src-js/components/ReTreeLine/index.scss

$--element-tree-line-color: #dcdfe6 !default;
$--element-tree-line-style: dashed !default;
$--element-tree-line-width: 1px !default;

/* 添加 el-tree-node__conten 默认没有的 position */
.el-tree .el-tree-node__content {
  position: relative;
}

.element-tree-node-label-wrapper {
  display: flex;
  flex: 1;
  align-items: center;
}

.element-tree-node-label {
  font-size: 12px;
}

.element-tree-node-line-ver {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  height: 100%;
  border-left: $--element-tree-line-width $--element-tree-line-style
    $--element-tree-line-color;

  &.last-node-line {
    border-left: $--element-tree-line-width $--element-tree-line-style
      transparent;
  }

  &.last-node-isLeaf-line {
    height: 50%;
  }
}

.element-tree-node-line-hor {
  position: absolute;
  top: 50%;
  left: 0;
  display: block;
  height: 0;
  border-bottom: $--element-tree-line-width $--element-tree-line-style
    $--element-tree-line-color;
}

.element-tree-node-label-line {
  flex: 1;
  align-self: center;
  margin: 0 10px;
  border-top: $--element-tree-line-width $--element-tree-line-style
    $--element-tree-line-color;
}