用css3写手风琴效果

最近在学习css3,就利用css写一个手风琴效果。话不多说上代码。

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>手风琴效果</title>
</head>
<style>
*{
  margin: 0;
  padding: 0;
}
.acciodMenu{
  width: 600px;
  margin: 20px auto;
  background-color: #fff;
}
.acciodMenu h2{
  margin: 5px 0;
  font-size: 16px;
  line-height: 16px;
}
.acciodMenu h2 a{
  position: relative;
  padding: 10px;
  display: block;
  text-decoration: none;
  background-color: gray;
  color: #333;
  border-radius: 6px;
}
.acciodMenu h2 a:before{
  content: '';
  position: absolute;
  right: 10px;
  top: 15px;
  width: 0;
  height: 0;
  border: 6px solid #fff;
  border-color: #fff transparent transparent;
}
.acciodMenu h2:hover a{
  background-color: #224466;
  background: -webkit-linear-gradient(top, #336699, #224466);
  color: #fff;
}

.acciodMenu p{
  padding: 0 10px;
  height: 0;
  overflow: hidden;
  font-size: 13px;
  transition: height 0.4s ease-in;
}

.acciodMenu h2:target a{
  background: #224466;
  background-position: 0 -15px;
  color: #fff;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.25), 1px 1px 1px rgba(0, 0, 0, 0.4);
}

.acciodMenu h2:target~p {
  height: 100px;
  overflow: auto;
}

.acciodMenu h2:target a::before{
  top: 13px;
  right: 6px;
  border-color: transparent transparent transparent #fff;
}
</style>
<body>
  <div class="acciodMenu">
    <div class="subAcciodMenu">
      <h2 id="brand"><a href="#brand">brand</a></h2>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Vero debitis minima in repellat, veniam consequatur hic velit excepturi expedita quae ad dolore culpa eos aperiam eveniet nemo porro consequuntur nihil.</p>
    </div>
    <div class="subAcciodMenu">
      <h2 id="sticky"><a href="#sticky">sticky</a></h2>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Vero debitis minima in repellat, veniam consequatur hic
        velit excepturi expedita quae ad dolore culpa eos aperiam eveniet nemo porro consequuntur nihil.</p>
    </div>
    <div class="subAcciodMenu">
      <h2 id="event"><a href="#event">event</a></h2>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Vero debitis minima in repellat, veniam consequatur hic
        velit excepturi expedita quae ad dolore culpa eos aperiam eveniet nemo porro consequuntur nihil.</p>
    </div>
  </div>
</body>
</html>

最后的效果感觉也还不错。如下截图：
用css3写手风琴效果

用到的技术点有：用css3写小三角，用目标伪元素实现锚点的切换及内容的展开与收缩，有兴趣的朋友可以了解一下。

用css3写手风琴效果

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