.n-options-tree
  min-width 200px
  max-width 400px

  // 行
  .n-options-line
    display flex
    align-items center

  // 文本
  .n-options-label
    padding 6px 0
    margin 0 4px
    flex auto
    overflow hidden
    white-space inherit
    text-overflow ellipsis
    min-height 32px


  // 箭头
  .n-options-tree-arrow
    flex-shrink 0
    width 24px
    line-height 24px
    transition transform 0.1s ease

  // 勾选项
  .n-options-tree-checkbox
    flex-shrink 0
    margin-right 4px


  // 全选
  .n-link-primary
    flex-shrink 0
    visibility hidden
    margin-right 8px
  .n-options-line:hover .n-link-primary
    visibility visible

  .n-options-footer
    justify-content flex-end