要使用CSS在order属性上实现动画，您可以尝试运行以下代码
<!DOCTYPE html>
<html>
<head>
<style>
#demo1 {
width: 600px;
height: 180px;
display: flex;
}
#inner {
animation: myanim 3s infinite;
}
#demo1 div {
width: 110px;
height: 180px;
}
@keyframes myanim {
30% {
order: 4;
}
}
</style>
</head>
<body>
<h1>CSS order property</h1>
<div id = "demo1">
<div style = "background-color:yellow;order:1;" id = "inner"></div>
<div style = "background-color:blue;order:2;"></div>
<div style = "background-color:orange;order:3;"></div>
<div style = "background-color:pink;order:4;"></div>
<div style = "background-color:gray;order:5;"></div>
<div style = "background-color:maroon;order:6;" id="inner"></div>
</div>
</body>
</html>