简单的后台框架

效果图

html代码

 <!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>简单后台框架</title>
    <style>
      body {
        height: 100vh;
        width: 100vw;
        display: grid;
        grid-template-columns: 10em 1fr;
        grid-template-rows: 6em 1fr;
        margin: 0;
      }
      body .header {
        grid-column-end: span 2;
        border-bottom: 1px solid currentColor;
        background-color: #008ead;
        padding: 2em;
        display: flex;
        align-items: center;
        color: #fff;
      }
      body .header div {
        margin-left: auto;
      }
      body .nav {
        background-color: #efc;
        margin: 0;
        padding-top: 1em;
        list-style: none;
      }
      body iframe {
        width: calc(100vw - 10em);
        height: calc(100vh - 6em);
        border-left: 1px solid currentColor;
      }
    </style>
  </head>
  <body>
    <!-- 顶部 -->
    <div class="header">
      <h2>管理后台</h2>
      <div>用户名：admin</div>
      <a href="">退出</a>
    </div>
    <!-- 左侧导航 -->
    <!-- li*5>a[href="demo$.html" target="content"]{菜单项$} -->
    <ul class="nav">
      <li><a href="demo1.html" target="content">菜单项1</a></li>
      <li><a href="demo2.html" target="content">菜单项2</a></li>
      <li><a href="demo4.html" target="content">菜单项3</a></li>
      <li><a href="demo5.html" target="content">菜单项4</a></li>
      <li><a href="demo6.html" target="content">菜单项5</a></li>
    </ul>
    <!-- 右侧内容 -->
    <iframe srcdoc="<h2 style='color:red'>欢迎光临...</h2>" frameborder="1" name="content"></iframe>
  </body>
</html>