<!DOCTYPE html>
<html lang="en">
<head>
<title>CSS 模板</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* { box-sizing: border-box;
}
body { margin: 0;
font-family: Arial, Helvetica, sans-serif;
}
.sidenav { height: 100%;
width: 200px;
position: fixed;
z-index: 1;
top: 0;
left: 0;
background-color: #111;
overflow-x: hidden;
}
.sidenav a { color: white;
padding: 16px;
text-decoration: none;
display: block;
}
.sidenav a:hover { background-color: #ddd;
color: black;
}
.content { margin-left: 200px;
padding-left: 20px;
}
</style>
</head>
<body>
<div class="sidenav">
<a href="#">链接</a>
<a href="#">链接</a>
<a href="#">链接</a>
</div>
<div class="content">
<h2>CSS 模板</h2>
<p>一个全高的、固定的侧边导航和内容。</p>
</div>
</body>
</html>