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简单的3行3列布局和固定定位
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简单的3行3列布局和固定定位

效果图

  • 代码如下：

    1.主要用到三个属性 position: absolute;position: relative;position: fixed;

  1. <!DOCTYPE html>
  2. <html lang="en">
  3.   <head>
  4.     <meta charset="UTF-8" />
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  7.     <title>Document</title>
  8.     <style>
  9.       * {
  10.         margin: 0;
  11.         padding: 0;
  12.         box-sizing: border-box;
  13.       }
  14.       :root {
  15.         font-size: 10px;
  16.       }
  17.       header,
  18.       footer {
  19.         height: 5rem;
  20.         background: #522332;
  21.       }
  22.       .container {
  23.         min-height: 40rem;
  24.         position: relative;
  25.         margin: 0.5rem 0;
  26.       }
  27.       .container aside {
  28.         width: 15rem;
  29.         background: #5646;
  30.         min-height: inherit;
  31.         position: absolute;
  32.       }
  33.       .container aside:first-of-type {
  34.         left: 0;
  35.         top: 0;
  36.       }
  37.       .container aside:last-of-type {
  38.         right: 0;
  39.         top: 0;
  40.       }
  41.       body {
  42.         position: relative;
  43.       }
  44.       .container main {
  45.         min-height: inherit;
  46.         background: burlywood;
  47.         position: absolute;
  48.         left: 15.5rem;
  49.         right: 15.5rem;
  50.       }
  51.       .container main img {
  52.         position: fixed;
  53.         left: 20rem;
  54.         top: 10rem;
  55.       }
  56.     </style>
  57.   </head>
  58.   <body>
  59.     <header>页眉</header>
  60.     <div class="container">
  61.       <aside>左侧</aside>
  62.       <main>
  63.         <img src="111.png" alt="" />
  64.       </main>
  65.       <aside>右侧</aside>
  66.     </div>
  67.     <footer>底部</footer>
  68.   </body>
  69. </html>
Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：
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