代码：
<!DOCTYPE html>
<html>
<head>
<title>照片影集</title>
<meta charset="utf-8">
<style type="text/css">
body{background-color: black;}
.BK{ 1000px;height: 600px;margin: 100px auto;position: relative;}
.photo{ 200px;height: 100px;position: absolute;transition:all 2s;opacity: 0.4;}
.photo:nth-child(1){top: 280px;left: 300px; transform: rotate(-30deg);z-index: 5}
.photo:nth-child(2){top: 400px;left: 350px;transform: rotate(20deg);z-index: 4}
.photo:nth-child(3){top: 180px;left: 300px;transform: rotate(30deg);z-index: 3}
.photo:nth-child(4){top: 210px;left: 600px;transform: rotate(30deg);z-index: 2}
.photo:nth-child(5){top: 280px;left: 500px;transform: rotate(-10deg);z-index: 1}
.photo:hover{transform: scale(3);z-index: 10;opacity: 1;position: absolute;top: 50%; left: 50%;}
</style>
</head>
<body>
<div class="BK">
<img src="../图片/1.jpg" class="photo">
<img src="../图片/2.jpg" class="photo">
<img src="../图片/3.jpg" class="photo">
<img src="../图片/4.jpg" class="photo">
<img src="../图片/5.jpg" class="photo">
</div>
</body>
</html>