纯css的树型构造 _HTML/CSS

纯css的树型结构

<html><head>
	<meta charset="utf-8">
	<title>UbuntuSoft for Windowser</title>
<style >
.tree ul {
  padding-top: 20px;
  position: relative;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
}
.tree li {
  float: left;
  text-align: center;
  list-style-type: none;
  position: relative;
  padding: 20px 5px 0 5px;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
}
.tree li::before,
.tree li::after {
  content: '';
  position: absolute;
  top: 0;
  right: 50%;
  border-top: 1px solid #ccc;
  width: 50%;
  height: 20px;
}
.tree li::after {
  right: auto;
  left: 50%;
  border-left: 1px solid #ccc;
}
.tree li:only-child::after,
.tree li:only-child::before {
  display: none;
}
.tree li:only-child {
  padding-top: 0;
}
.tree li:first-child::before,
.tree li:last-child::after {
  border: 0 none;
}
.tree li:last-child::before {
  border-right: 1px solid #ccc;
  border-radius: 0 5px 0 0;
  -webkit-border-radius: 0 5px 0 0;
  -moz-border-radius: 0 5px 0 0;
}
.tree li:first-child::after {
  border-radius: 5px 0 0 0;
  -webkit-border-radius: 5px 0 0 0;
  -moz-border-radius: 5px 0 0 0;
}
.tree ul ul::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  border-left: 1px solid #ccc;
  width: 0;
  height: 20px;
}
.tree li a {
  border: 1px solid #ccc;
  padding: 5px 10px;
  text-decoration: none;
  color: #666;
  font-family: arial, verdana, tahoma;
  font-size: 11px;
  display: inline-block;
  border-radius: 1px;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
}
.tree li a:hover{
  background: #c8e4f8;
  color: #000;
  border: 1px solid #94a0b4;
}
.tree li a:hover+ul li a {
  background: #0095FF;
  color: #fff;
  border: 1px solid #94a0b4;
}
.tree li a:hover+ul li::after,
.tree li a:hover+ul li::before,
.tree li a:hover+ul::before,
.tree li a:hover+ul ul::before {
  border-color: #94a0b4;
}
.clearfix:after {
    content: "";
    display: block;
    height: 0;
    clear: both;
}
.clearfix {
    zoom: 1;
}
</style>
</head>
<body>
	
<div class="tree clearfix">
  <ul>
    <li><a href="http://www.linux.org/">Linux</a>
      <ul>
        <li><a href="http://www.debian.org/">Debian</a>
          <ul>
            <li><a href="http://www.ubuntu.com/">Ubuntu</a>
              <ul>
                <li><a href="http://www.linuxdeepin.com/">Deepin</a></li>
                <li><a href="http://www.linuxmint.com/">Mint</a></li>
                <li><a href="http://elementaryos.org/">ElementaryOS</a></li>
                <li><a href="http://www.jolicloud.com/">Jolicloud</a></li>
		   <li><a href="http://www.ubuntu.com/project/about-ubuntu/derivatives">X/K/L+Ubuntu</a></li>
              </ul>	    
	  </li>    
            <li><a href="http://www.linuxmint.com/">LMDE</a></li>
          </ul>
        </li>
	<li><a href="http://www.opensuse.org/zh-cn/">openSUSE</a>
		<ul><li><a href="http://www.anthonos.org/">Anthon</a></li></ul>
	</li>
	<li><a href="http://www.startos.org/">StartOS</a></li>
	<li><a href="http://fedoraproject.org/">Fedora</a></li>
	<li><a href="http://www.archlinux.org/">Arch</a>
		<ul>
			<li><a href="http://www.chakra-project.org/">Chakra</a></li>
			<li><a href="http://archbang.org/">ArchBang</a></li>
		</ul>
	</li>
      </ul>
    </li>
  </ul>
</div>


</body>
</html>

<!--
部件来源{
	二叉树：http://cssdeck.com/labs/tree
	


-->
参考
http://www.ubuntusoft.com/wp-content/themes/twentyeleven/
http://cssdeck.com/labs/tree