css/css-layout-grail.assets/wing-layout.html

<!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>双飞翼布局</title>
  <link rel="stylesheet" href="./bg-color.css">
  <style>
    .container {
      display: flow-root;
      min-width: 550px;
    }

    .wrap-center,
    .left,
    .right {
      float: left;
    }

    .wrap-center {
      width: 100%;
    }

    .center {
      margin-left: 200px;
      margin-right: 150px;
    }

    .left {
      width: 200px;
      margin-left: -100%;
    }

    .right {
      width: 150px;
      margin-left: -150px;
    }
  </style>
</head>

<body>

  <!--  
    1. 首先设置三栏浮动(中栏包裹层浮动)，父容器清除浮动
    2. 设置三栏的宽度，中栏包裹层自适应，左右两栏定宽
    3. 中栏设置 margin，给左右两栏预留出空间
    4. 左右两栏使用负外边距，浮动到中栏预留出的空间
    5. 给父容器设置最小宽度(左栏+右栏)，防止布局坏掉
  -->

  <div class="header">header</div>
  <div class="container">
    <div class="wrap-center">
      <div class="center">center</div>
    </div>
    <div class="left">left</div>
    <div class="right">right</div>
  </div>
  <div class="footer">footer</div>
</body>

</html>