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源码下载：关注公众号【RMRF】，回复【css12】可获取源码
使用@keyframes rotation关键帧动画，让圆环从 0 度旋转到 360 度，实现发光彩色圆环特效的卡片
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./css/index.css">
</head>
<body>
<div class="container">
<div class="card">
<div class="card-content"></div>
</div>
</div>
</body>
</html>
CSS
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./css/index.css">
</head>
<body>
<div class="container">
<div class="card">
<div class="card-content"></div>
</div>
</div>
</body>
</html>