css 一个小技巧

微信图片_20210324120905.png

一级标题

.lefticon{
  display:inline-block;
  border-top: 12px solid transparent;
  border-right: 16px solid #42b983;
  border-bottom: 12px solid transparent;
   z-index: 99;
}

.righticon{
  display:inline-block;
  border-top: 12px solid transparent;
  border-left: 16px solid #42b983;
  border-bottom: 12px solid transparent;
  z-index: 99;
}