<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title>Document</title>
<style>
body{
margin: 0;
padding: 0;
background-color: #000;
}
a{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
width: 200px;
height: 60px;
text-align: center;
line-height: 60px;
color: #fff;
font-size: 24px;
text-decoration: none;
font-family: sans-serif;
box-sizing: border-box;
background:
linear-gradient(90deg,#03a9f4,#f441a5,#ffeb3b,#03a9f4);
border-radius: 30px;
background-size: 400%;
z-index: 1;
}
a:hover{
animation: animate 8s linear infinite ;
}
@keyframes animate{
from{
background-position: 0%;
}
to{
background-position: 400%;
}
}
a::before{
content: '';
position: absolute;
inset: -5px;
z-index: -l;
background: (90deg,#03a9f4,#f441a5,#ffeb3b,#03a9f4);
background-size: 400%;
border-radius: 40px;
opacity: 0;
}
a:hover::before{
filter: blur(20px);
opacity: 1;
animation: animate 8s linear infinite;
}
</style>
</head>
演示:34.mov
<body>
<a href="#">BUTTON</a>
</body>
