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<!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>
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