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<!DOCTYPE html> <html> <head> <style> div { width: 100px; height: 100px; background-color: red; position: relative; animation-name: example; animation-duration: 4s; animation-delay: -2s; } @keyframes example { 0% {background-color:red; left:0px; top:0px;} 25% {background-color:yellow; left:200px; top:0px;} 50% {background-color:blue; left:200px; top:200px;} 75% {background-color:green; left:0px; top:200px;} 100% {background-color:red; left:0px; top:0px;} } </style> </head> <body> <p>使用负值：在这里，动画将开始播放，就好像它已经播放了 2 秒一样：</p> <div></div> <p><b>注意：</b>此示例不适用于 Internet Explorer 9 和更早版本。</p> </body> </html>