@mixin pickerStackColumn($count) {
  @for $i from 1 through $count {
    &:nth-child(#{$i}) {
      z-index: $i * 2;

      @if ($i > 2) {
        left: r(60 * ($i - 2));
      }

      .#{$prefixCls-picker}-stack-column-wrapper {
        z-index: $i * 2 + 1;

        @if ($i > 1) {
          left: r(60);
        }
      }

      .#{$prefixCls-picker}-stack-item {
        @if ($i > 2) {
          padding-left: r(10);
        }
      }
    }
  }
}