<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<style type="text/css">
h3{margin:0;padding:0;
border:0;
font-size:18px;}
.box{width:300px;
border-left:300px solid #0026ff;
background:#808080
}
.left{margin-left:-300px;
float:left;
}
</style>
</head>
<body>
<div class="box">
<nav class="left">
<h3>导航</h3>
<h3>导航</h3>
</nav>
<section>
<div class="module">模块</div>
<div class="module">模块</div>
<div class="module"></div>
<div class="module"></div>
<div class="module"></div>
<div class="module"></div>
<div class="module"></div>
<div class="module"></div>
</section>
</div>
</body>
</html>
一毛钱