ResponsiveWeb/layout03.html at master · DevSamLee/ResponsiveWeb · GitHub

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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>Layout 03</title>
 <style>
  * {margin: 0; padding: 0;}
  #wrap {width: 1200px; margin: 0 auto;}
  body {background-color: #e3f2fd;}
  .header {width: 100%; height: 100px; background: #81d4fa;}
  .aside {float: left; width: 30%; height: 900px; background: #4fc3f7;}
  .article1 {float: left; width: 70%; height: 300px; background: #29b6f6;}
  .article2 {float: left; width: 70%; height: 300px; background: #03a9f4;}
  .article3 {float: left; width: 70%; height: 300px; background: #039be5;}
  .footer {clear: both; width: 100%; height: 100px; background: #0288d1;}

  /* screen width 0 - 1200px */
  @media (max-width: 1220px){
   #wrap {width: 100%;}
   .article1 {height: 450px;}
   .article2 {height: 450px;}
   .article3 {float: none; clear: both; width: 100%;}
  }

  /* screen width 0 - 768px */
  @media (max-width: 768px){
   .aside {width: 100%; height: 300px;}
   .article1 {width: 50%;}
   .article2 {width: 50%;}
  }

  /* screen width 0 - 480px */
  @media (max-width: 480px){
   .article1 {width: 100%;}
   .article2 {width: 100%;}
  }
 </style>
</head>
<body>
 <div id="wrap">
  <header class="header"></header>
  <aside class="aside"></aside>
  <section class="article1"></section>
  <section class="article2"></section>
  <section class="article3"></section>
  <footer class="footer"></footer>
 </div>
</body>
</html>