纯CSS3轮播图

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>纯CSS3轮播图</title>
<style>
html,body{
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
div{
position: fixed;
top: 0;
left: 0;
bottom: 0;
right: 0;
background-size: cover;
opacity: 0;
animation: show 20s ease-out infinite;
}
@keyframes show{
0%{
opacity:0;
z-index:2;
}
5%{
opacity:1;
z-index: 1;
}
20%{
opacity:1;
z-index:1;
}
25%{
opacity:0;
z-index:0;
}
100%{
opacity:0;
z-index:0;
}
}
div:nth-child(1){
background-image: url(1.jpg);
animation-delay: -1s;
}
div:nth-child(2){
background-image: url(2.jpg);
animation-delay: 3s;
}
div:nth-child(3){
background-image: url(3.jpg);
animation-delay: 7s;
}
div:nth-child(4){
background-image: url(4.jpg);
animation-delay: 11s;
}
div:nth-child(5){
background-image: url(5.jpg);
animation-delay: 15s;
}
</style>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</body>
</html>