<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>返回箭头按钮</title>
<style>
.back-button {
display: inline-block;
padding: 10px 20px;
background-color: #007bff;
color: white;
text-decoration: none;
border-radius: 5px;
font-size: 16px;
}
.back-button::before {
content: '\2190'; /* Unicode left arrow */
margin-right: 10px;
}
</style>
</head>
<body>
<a href="#">返回</a>
</body>
</html>
参考：https://cloud.tencent.com/developer/information/%E8%BF%94%E5%9B%9E%E7%AE%AD%E5%A4%B4%E6%8C%89%E9%92%AE%20css
