瀚海沙

css3制作手风琴效果，通过目标伪类选择器“E：target”，显示和隐藏不同栏目的内容，从而实现手风琴效果。

html代码如下：

<div class="accordionMenu">
  <div class="menuSection" id="brand">
    <h2><a href="#brand">Brand</a></h2>
    <p>Lorem ipsum dolor...</p>
  </div>
  <div class="menuSection" id="promotion">
    <h2><a href="#promotion">Promotion</a></h2>
    <p>Lorem ipsum dolor sit amet...</p>
  </div>
  <div class="menuSection" id="event">
    <h2><a href="#event">Event</a></h2>
    <p>Lorem ipsum dolor sit amet...</p>
  </div>
</div>

.accordionMenu{
  background:#fff;
  color:#424242;
  font:12px Arial, Verdana, sans-serif;
  margin:0 auto;
  padding:10px;
  width:500px;
}
.accordionMenu h2{
  margin:5px 0px;
  padding:0px;
  position:relative;
}
.accordionMenu h2:before{
  border:5px solid #fff;
  border-color:#fff transparent transparent;
  content:"";
  height:0;
  position:absolute;
  right:10px;
  top:15px;
  width:0;
}
.accordionMenu h2 a{
  background:#8f8f8f;
  background:-moz-linear-gradient(top, #cecece, #8f8f8f);
  background:-webkit-gradient(linear, left top, left bottom, from(#cecece), to(#8f8f8f));
  background:-webkit-linear-gradient(top, #cecece, #8f8f8f);
  background:-o-linear-gradient(top, #cecece,#8f8f8f);
  background:linear-gradient(top, #cecece, #8f8f8f);
  border-radius:5px;
  color:#424242;
  display:block;
  font-size:13px;
  font-weight:normal;
  margin:0;
  padding:10px 10px;
  text-shadow:2px 2px 2px #aeaeae;
  text-decoration:none;
}
.accordionMenu:target h2 a,
.accordionMenu h2 a:focus,
.accordionMenu h2 a:hover,
.accordionMenu h2 a:active{
  background:#2288dd;
  background: -moz-linear-gradient(top,#6bb2ff, #2288dd);
  background:-webkit-gradient(linear, left top, left bottom, from(#6bb2ff), to(#2288dd));
  background:-webkit-linear-gradient(top, #6bb2ff, #2288dd);
  background:-o-linear-gradient(top, #6bb2ff, #2288dd);
  background:linear-gradient(top, #6bb2ff, #2288dd);
  color:#fff;
}
.accordionMenu p{
  margin:0;
  height:0;
  overflow: hidden;
  padding:0 10px;
  -moz-transition: height 0.5s easse-in;
  -webkit-transition:height 0.5s ease-in;
  -o-transition:height 0.5s ease-in;
  transition:height 0.5s ease-in;
}
.menuSection:target p{
  height:100px;
  overflow: auto;
}
.menuSection:target h2:before{
  border-color:transparent transparent transparent #fff;
}