效果截图
代码
<!DOCTYPE html>
<html>
<head>
<title>红色呼吸灯紧急特效</title>
<style>
@keyframes alarm {
0% {box-shadow: 0 0 30px #ff0000;}
50% {box-shadow: 0 0 60px #ff0000, inset 0 0 60px #ff0000;}
100% {box-shadow: 0 0 30px #ff0000;}
}
body {
height: 100vh;
margin: 0;
animation: alarm 1s linear infinite;
}
</style>
</head>
<body></body>
</html>
