transitionアニメーション

<!DOCTYPE html>
<html lang="ja">
<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>transitionのアニメーション2</title>
<style>
html,body,p,h2{
margin: 0;
padding: 0;
}
img{
vertical-align: bottom;
}
.wrapper{
display: flex;
width: 960px;
justify-content: space-between;
margin: 100px auto 0;
}
.box{
width: 300px;
height: 200px;
position: relative;
overflow: hidden;
}
.caption1{
width: 300px;
height: 200px;
background-color: rgba(0, 0, 0, 0.4);
color: #FFF;
position: absolute;
top: 0;
left: 0;
opacity: 0;
transition: 0.5s;
}
.caption1:hover{
opacity: 1;
}
.photo>img{
transition: 0.5s;
}
.photo:hover>img{
transform: scale(1.2);
}
.caption3{
width: 150px;
height: 200px;
background-color: slateblue;
position: absolute;
bottom: 0;
left: 300px;
transition: 0.5s;
}
.box:hover>.caption3{
left: 150px;
}
</style>
</head>
<body>
<div class="wrapper">
<div class="box">
<img src="img/photo01.jpg" alt="">
<div class="caption1">
<h2>画像のタイトル</h2>
<p>Lorem ipsum dolor sit, amet consectetur adipisicing elit. Fugiat, fugit!</p>
</div>
</div><!-- /.box -->

<div class="box photo">
<img src="img/photo02.jpg" alt="">
</div>

<div class="box">
<img src="img/photo03.jpg" alt="">
<div class="caption3"></div>
</div><!-- /.box -->
</div><!-- /.wrapper -->
</body>
</html>