<div class="container">
  <ul>
    <li>list-type color</li>
  </ul>
  <img src="error/error.img" alt="错误的图片">
  <hr class="hr1"/>
  <hr class="hr2"/>
  <hr class="hr3"/>
</div>
.container{
  color:deeppink;
}

hr.hr1{
  color:red;
}
hr.hr2{
  background-color:red;
}
hr.hr3{
  border-top:1px solid red;
}
Rerun