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什么是响应式 Web 设计？

  • RWD 指的是响应式 Web 设计（Responsive Web Design）
  • RWD 能够以可变尺寸传递网页
  • RWD 对于平板和移动设备是必需的

创建您自己的响应式设计

创建响应式设计的一个方法，是自己来创建它：

<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
.city {
float: left;
margin: 5px;
padding: 15px;
width: 300px;
height: 300px;
border: 1px solid black;
} 
</style>
</head>

<body>

<h1>W3School Demo</h1>
<h2>Resize this responsive page!</h2>
<br>

<div class="city">
<h2>London</h2>
<p>London is the capital city of England.</p>
<p>It is the most populous city in the United Kingdom,
with a metropolitan area of over 13 million inhabitants.</p>
</div>

<div class="city">
<h2>Paris</h2>
<p>Paris is the capital and most populous city of France.</p>
</div>

<div class="city">
<h2>Tokyo</h2>
<p>Tokyo is the capital of Japan, the center of the Greater Tokyo Area,
and the most populous metropolitan area in the world.</p>
</div>

</body>
</html>

使用 Bootstrap

另一个创建响应式设计的方法，是使用现成的 CSS 框架。

Bootstrap 是最流行的开发响应式 web 的 HTML, CSS, 和 JS 框架。

Bootstrap 帮助您开发在任何尺寸都外观出众的站点：显示器、笔记本电脑、平板电脑或手机：

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" 
  href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head>

<body>

<div class="container">
<div class="jumbotron">
  <h1>W3School Demo</h1> 
  <p>Resize this responsive page!</p> 
</div>
</div>

<div class="container">
<div class="row">
  <div class="col-md-4">
    <h2>London</h2>
    <p>London is the capital city of England.</p>
    <p>It is the most populous city in the United Kingdom,
    with a metropolitan area of over 13 million inhabitants.</p>
  </div>
  <div class="col-md-4">
    <h2>Paris</h2>
    <p>Paris is the capital and most populous city of France.</p>
  </div>
  <div class="col-md-4">
    <h2>Tokyo</h2>
    <p>Tokyo is the capital of Japan, the center of the Greater Tokyo Area,
    and the most populous metropolitan area in the world.</p>
  </div>
</div>
</div>

</body>
</html>

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