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<!DOCTYPE html> <html> <head> <style> div { width: 100px; height: 100px; background: red; position: relative; animation: mymove 5s infinite; } @keyframes mymove { from {top: 0px;} 50% {top: 100px !important} /* ignored */ to {top: 200px;} } </style> </head> <body> <h1>@keyframes 规则</h1> <p>!important 规则在关键帧中被忽略。 尝试将其删除，然后查看结果。</p> <p><strong>注意：</strong>@keyframes 规则在 Internet Explorer 9 及更早版本中不受支持。</p> <div></div> </body> </html>