填充的元素的属性集的左，右，顶部和底部填充（空间）。
您可以尝试运行以下代码来实现padding属性。
<html> <head> </head> <body> <p style = "padding: 25px; border:2px solid orange;"> All four padding will be 25px </p> <p style = "padding:20px 4%; border:2px solid red;"> Top and bottom padding will be 20px, left and right padding will be 4% of the total width of the document. </p> <p style = "padding: 15px 3% 10px; border:1px solid maroon;"> Top padding will be 15px, left and right padding will be 3% of the total width of the document, bottom padding will be 10px </p> </body> </html>