css样式退出效果（纯css实现选中切换效果的示例）

<p>你喜欢哪种水果</p>
<ul>
  <li>
    <label for="banana">      
      <input type="radio" id="banana" name="fruit">     
      <span>香蕉</span>
    </label>    
  </li>
  <li>
    <label for="apple">      
      <input type="radio" id="apple" name="fruit">    
      <span>苹果</span>
    </label>    
  </li>
  <li>    
    <label for="orange">      
      <input type="radio" id="orange" name="fruit">      
      <span>橘子</span>
    </label>    
  </li>
</ul>

ul,li{
  list-style-type:none;
}
ul{
  border:1px solid #000;
  padding:5px;
  width:200px;
}
li{
  margin:2px;
  background:#ccc;
}

input:checked + span{
  color:#F66;
  font-weight:bold;
  background:#ff0;
}

input[type="radio"]{
  display:none;
}

li label,
li label span{
  display:inline-block;
  width:100%;
}