App下載
實(shí)例代碼( Tip: 登錄后體驗(yàn)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>
<div class="w3-container w3-margin-bottom w3-teal">
  <p>w3-margin-bottom 类为元素添加16px的底部边框.</p>
</div>
<div class="w3-container w3-margin-left w3-teal">
  <p>w3-margin-left 类为元素添加16px的左边框.</p>
</div>
<div class="w3-container w3-margin-right w3-teal">
  <p>w3-margin-right 类为元素添加16px的左边框.</p>
</div>
<div class="w3-container w3-margin-top w3-teal">
  <p>w3-margin-top 类为元素添加16px的上边框.</p>
</div>
</body>
</html>
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