/* 多行省略 */
@mixin ellipsis($rowCount: 1) {
  @if $rowCount <=1 {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  } @else {
    display: -webkit-box;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-line-clamp: $rowCount;
    -webkit-box-orient: vertical;
  }
}