before和after中，是after盖住了before

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>百度钱包</title>
	<style>
	.miuse {
		width: 300px;
		height: 300px;
		border: 1px solid #000;
		margin: 100px auto;
		position: relative;
	}
	.miuse::before,.miuse::after {
		content: "";
		position: absolute;
		width: 100%;
		height: 100%;
		border-radius: 50%;
		background-color: red;
		left: 0px;
		top: 0px;
		transition: transform 0.8s;
		text-align: center;
		line-height: 300px;
	}
	.miuse::before {
		content: "我是正面";
		color: white;
	}
	.miuse::after {
		content: "我是反面";
		background-color: blue;
	}
	</style>
</head>
<body>
	<div class="miuse">
	
	</div>
</body>
</html>