火龙果文档

# 圣杯布局

# 圣杯布局代码

<!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>Document</title>
  <style>
    * {
      padding: 0;
      margin: 0;
    }

    body {
      text-align: center;
      position: relative;
      min-width: 800px;
      --aside-width: 200px;
      --main-width: 500px;
      --offset-width: -200px;
    }

    header, footer {
      height: 40px;
    }

    main, .wrapper aside {
      height: var(--main-width);
      width: var(--aside-width);
      position: relative;
    }

    header {
      background-color: aqua;
    }

    main {
      background-color: antiquewhite;
      width: 100%;
    }

    body aside:nth-of-type(1) {
      background-color: red;
      margin-left: -100%;
      left: var(--offset-width);
    }

    body aside:nth-of-type(2) {
      background-color: gold;
      margin-left: var(--offset-width);
      right: var(--offset-width);
    }

    footer {
      background-color: skyblue;
    }

    main, aside {
      float: left;
    }

    .clearfix::after {
      content: "";
      display: block;
      clear: both;
    }

    .wrapper {
      padding: 0 var(--aside-width);
    }
  </style>
</head>

<body>
  <header>头部区域</header>
  <div class="clearfix wrapper">
    <main>主区域</main>
    <aside>侧边栏</aside>
    <aside>侧边栏</aside>
  </div>
  <footer>底部区域</footer>
</body>

</html>

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