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在线客服固定定位和三行三列布局
番茄炒蛋
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在线客服固定定位

效果

代码

  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.       }
  13.       img {
  14.         position: fixed;
  15.         right: 0;
  16.         top: 20em;
  17.       }
  18.     </style>
  19.   </head>
  20.   <body bgcolor="#2c3e50">
  21.     <img src="./img/QQ截图20210705155538.png" alt="" />
  22.   </body>
  23. </html>

三行三列布局

效果

代码

  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.         text-align: center;
  14.         color: white;
  15.         font-size: 30px;
  16.         font-weight: bold;
  17.       }
  18.       html {
  19.         font-size: 10px;
  20.       }
  21.       body {
  22.         font-size: 1.6rem;
  23.       }
  24.       header {
  25.         height: 5rem;
  26.         background-color: #e74645;
  27.       }
  28.       footer {
  29.         height: 5rem;
  30.         background-color: #fb7756;
  31.       }
  32.       main {
  33.         margin: 0.5rem 0;
  34.         min-height: calc(100vh - 11rem);
  35.         position: relative;
  36.       }
  37.       aside {
  38.         width: 20rem;
  39.         min-height: inherit;
  40.         position: absolute;
  41.       }
  42.       aside:first-of-type {
  43.         background-color: #facd60;
  44.         left: 0;
  45.         top: 0;
  46.       }
  47.       aside:last-of-type {
  48.         background-color: #1ac0c6;
  49.         right: 0;
  50.         top: 0;
  51.       }
  52.       .main {
  53.         position: absolute;
  54.         min-height: inherit;
  55.         background-color: #34495e;
  56.         left: 21rem;
  57.         right: 21rem;
  58.       }
  59.     </style>
  60.   </head>
  61.   <body>
  62.     <header>头部</header>
  63.     <main>
  64.       <aside>左侧</aside>
  65.       <div class="main">主题</div>
  66.       <aside>右侧</aside>
  67.     </main>
  68.     <footer>底部</footer>
  69.     <script></script>
  70.   </body>
  71. </html>
Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：
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