html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
* {
margin: 0;
}
html {
height: 100%;
}
body {
height: 100%;
}
.avatar {
width: 30%;
height: 30%;
border-radius: 200px;
overflow: hidden;
position: relative;
}
.avatar::after {
/* 【主要代码】 */
position: absolute;
content: '';
width: 100%;
height: 100%;
top: 0;
left: 0;
border-radius: 200px; /* 避免四个角没有阴影 */
box-shadow: 0 0 50px 30px #fff inset; /* 【主要代码】 */
}
img {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<div class="avatar">
<img src="https://images.dog.ceo/breeds/pembroke/n02113023_6519.jpg" />
</div>
</body>
</html>