伪类中使用element图标

/deep/.el-step.is-horizontal .el-step__line::after {
    
    
  content: "\e6e0";
  font-family: element-icons; 
  position: absolute;
  right: -8px;
  font-weight: 500;
  top: -11px;
  font-size: 22px;
}

这一行是必须加的：

  font-family: element-icons;