设置不同的HTML元素的字体大小 - 在线编辑器

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    h1 {
      font-size: 250%;
    }

    h2 {
      font-size: 200%;
    }

    p {
      font-size: 100%;
    }
  </style>
</head>

<body>
  <h1>This is heading 1</h1>
  <h2>This is heading 2</h2>
  <p>This is a paragraph.</p>
</body>

</html>
​x
 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    h1 {
      font-size: 250%;
    }
​
    h2 {
      font-size: 200%;
    }
​
    p {
      font-size: 100%;
    }
  </style>
</head>
​
<body>
  <h1>This is heading 1</h1>
  <h2>This is heading 2</h2>
  <p>This is a paragraph.</p>
</body>
​
</html>