51help TIY
码：
<!DOCTYPE html> <html> <head> <style> h1 { rotation-point:50% 50%; rotation:180deg; } </style> </head> <body> <h1>旋转效果</h1> <p><b>注释：</b>览器支持 rotation-point 或 rotation 属性。</p> </body> </html>
查看结果: