如何使用浏览器的后退按钮作为超链接(请限制js的使用，我想坚持使用html和css)？

<a href="#">返回</a>

<style>
  a {
    display: inline-block;
    padding: 10px 20px;
    background-color: #f1f1f1;
    color: #333;
    text-decoration: none;
    border: none;
    cursor: pointer;
  }
</style>

<script>
  window.onhashchange = function() {
    history.back();
  };
</script>

<a href="#">返回</a>

<style>
  a {
    display: inline-block;
    padding: 10px 20px;
    background-color: #f1f1f1;
    color: #333;
    text-decoration: none;
    border: none;
    cursor: pointer;
  }
</style>

<script>
  window.onhashchange = function() {
    history.back();
  };
</script>