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 />