App下載
實例代碼( Tip: 登錄后體驗更佳 )
<!DOCTYPE html>
<html>
<title>编程狮(w3cschool.cn)</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://7npmedia.w3cschool.cn/w3.css">
<body class="w3-xxlarge">
<div class="w3-container w3-black w3-text-red">
  <p>黑底红字.</p>
</div>
<div class="w3-container w3-gray w3-text-red">
  <p>灰底红字.</p>
</div>
<div class="w3-container w3-text-red">
  <p>白底红字.</p>
</div>
</body>
</html>
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運行結(jié)果