<html><head><style> div { width: 100px; height: 100px; background: red; position: relative; animation-name: example; animation-duration: 3s; animation-delay: 2s; animation-fill-mode: backwards;}@keyframes example { from {top: 0px; background-color: yellow;} to {top: 200px;}}</style></head><body><p>动画开始之前（animation-delay 期间），让 div 元素获取第一个关键帧设置的样式值：</p><div></div><p><b>注释：</b>Internet Explorer 9 以及更早的版本不支持 animation-fill-mode 属性。</p></body></html>