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<!DOCTYPE html> <html> <head> <style> #myDIV { background-color: lightblue; border: 1px solid black; animation: mymove 5s infinite; } @keyframes mymove { 50% {padding-top: 50px;} } </style> </head> <body> <h1>padding-top 的动画</h1> <p>逐渐将 padding-top 从 0px 更改为 50px，然后再更改回 0px：<p> <div id="myDIV"> Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat... </div> <p><strong>注意：</strong>CSS 动画在 Internet Explorer 9 及更早版本中不起作用。</p> </body> </html>