CSS hover 底部三角形

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CSS hover 底部三角形

.item{
  position: relative;
  // 三角形
  &:hover:after{
    content: "";
    position: absolute;
    bottom: -20px;
    left: 50%;
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-right: 10px solid #EFFAFA;
    border-bottom: 10px solid transparent;
    border-left: 10px solid transparent;
    transform: rotate(270deg);
  }
}