将 h1 元素旋转 180 度（从上向下）：p> - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <style>
    h1 {
      rotation-point: 50% 50%;
      rotation: 180deg;
    }
  </style>
</head>
<body>

  <h1>Rotation effect</h1>

  <p><b>Note:</b> None of the major browsers support the rotation-point or rotation properties.</p>

</body>
</html>
        