image.png
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
body {
background: #000;
}
.btn {
width: 200px;
height: 100px;
margin: 50px auto;
color: #fff;
background: #274593;
outline: 0;
border: none;
position: relative;
z-index: 0;
overflow: hidden;
border-radius: 4px;
display: flex;
justify-content: center;
align-items: center;
}
.btn::before{
content: '';
display: block;
position: absolute;
left: 50%;
top: 50%;
width: 200%;
height: 200%;
background: red;
z-index: -2;
transform-origin: left top;
animation: zhuan 3s linear infinite;
}
.btn::after{
content: '';
display: block;
position: absolute;
top: 2px;
right: 2px;
bottom: 2px;
left: 2px;
background: #000;
z-index: -1;
border-radius: inherit;
}
@keyframes zhuan {
to{
transform: rotate(360deg);
}
}
</style>
</head>
<body>
<div class="btn">我是文字</div>
</body>
</html>
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