<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>小太阳案例</title>
<style type="text/css">
/*小太阳*/
* {
margin: 0;
padding: 0;
}
html,body {
width: 100%;
height: 100%;
overflow: hidden;
}
.sun {
width: 100px;
height: 100px;
margin:100px;
position: relative;
}
.sun::before,.sun::after {
content: "";
position: absolute;
top: 50%;
left: 50%;
width: 50px;
height: 50px;
transform: translate(-50%,-50%);
background-color: rgba(255,255,255,0.8);
border-radius: 50%;
animation: sun 2s infinite;
}
.sun::after {
width: 80px;
height: 80px;
background: rgba(255,255,255,0.6);
animation: sun 3s infinite;
}
@keyframes sun {
0% {
transform: translate(-50%,-50%) scale(1);
box-shadow: 0px 0px 5px rgba(255,255,255,0.7);
}
50% {
transform: translate(-50%,-50%) scale(1.1);
box-shadow: 0px 0px 30px rgba(255,255,255,0.7);
}
100% {
transform: translate(-50%,-50%) scale(1);
box-shadow: 0px 0px 5px rgba(255,255,255,0.7);
}
}
</style>
</head>
<body>
<div class="sun"></div>
</body>
</html>
来源：https://www.cnblogs.com/youzhishusheng/p/12337487.html