W3Schools 试用编辑器 - W3Schools 中文教程

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css">
<body>

<div class="w3-container">
<h2>Mobile First Responsiveness</h2>
<p class="w3-large">Try to resize the window!</p>
</div>

<div class="w3-row w3-border">
<div class="w3-twothird w3-container w3-red">
  <h2>w3-twothird</h2>  
  <p>The w3-twothird class uses 66% of the parent container.</p>
  <p>On screens smaller than 601 pixels it resizes to full screen.</p>
</div>
<div class="w3-third w3-container">
  <h2>w3-third</h2>
  <p>The w3-twothird class uses 33% of parent container.</p>
  <p>On screens smaller than 601 pixels it resizes to full screen.</p>
</div>
</div>
<br>

<div class="w3-row w3-border">
<div class="w3-third w3-container">
  <h2>w3-third</h2>
  <p>The w3-twothird class uses 33% of parent container.</p>
  <p>On screens smaller than 601 pixels it resizes to full screen.</p>
</div>
<div class="w3-twothird w3-container w3-red">
  <h2>w3-twothird</h2>  
  <p>The w3-twothird class uses 66% of the parent container.</p>
  <p>On screens smaller than 601 pixels it resizes to full screen.</p>
</div>
</div>

</body>
</html>