前端在标题前面添加蓝色竖线

<br><br>.title {
  position: relative;
  padding-left: 13px;
  margin: 24px 0px;
}
 
.title:before {
  content: '';
  background-color: #3796EC;
  width: 4px;
  height: 16px;
  position: absolute;
  left: 0;
  top: 50%;
  margin-top: -8px;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
}