SOURCE

<div class="e1">标签</div>

div {
  width:200px;
  height:80px;
  line-height:80px;
  text-align:center;
  position: relative;
}
div::before {
  content:'';
  position: absolute;
  background:yellow;
  left:0;right:0;top:0;bottom:0;
  z-index:-1;
}
.e1::before {
  transform-origin:bottom;
  transform: perspective(.5em) rotateX(5deg);
}