<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;} /* 被忽略 */ to {top: 200px;}}</style></head><body><h1>@keyframes 规则</h1><p>!important 规则在关键帧中被忽略。请尝试删除它，然后查看结果。</p><div></div></body></html>