效果图如下：
话不多说，上代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>炫彩流光圆环</title>
<style>
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
body{
width: 100vw;
height: 100vh;
background-color: #505050;
display: grid;
place-items:center;
}
.box{
width: 400px;
height: 400px;
background: url(./pig.jpg);
border-radius: 50%;
display: grid;
place-items:center;
position: relative;
color:#fff;
}
.box::before{
content: "";
width: 400px;
height: 400px;
background:linear-gradient(0deg,#3498db,#8e44ad,#2ecc71,#e74c3c);
border-radius: 50%;
position: absolute;
filter:blur(10px);
animation: rotate 10s linear infinite 0s;
}
.box>div{
width: 300px;
height: 300px;
background-color: #505050;
border-radius: 50%;
z-index: 2;
display: grid;
place-items: center;
}
@keyframes rotate {
to{
transform: rotate(360deg);
}
}
</style>
</head>
<body>
<div class="box">
<div></div>
</div>
</body>
</html>
