下了一个软件：ScreenToGif用来截取动态图片，终于可以展示我的小动图啦，嘻嘻，敲开心！
main.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>动画</title>
<style type="text/css">
.box{
width:249px;
height:299px;
margin:50px auto;
position:relative;
overflow:hidden;
} .box .pic_info{
width:249px;
height:100px;
background-color: rgba(0,0,0,0.5);
color:#fff;
position: absolute;
left:0;
top:300px;
transition:all 500ms ease;
} .box:hover .pic_info{ top:250px;
} .box .pic_info p{
text-align: center;
}
</style>
</head>
<body> <div class="box">
<img src="data:images/login.jpg" alt="animal">
<div class="pic_info"><p>图片说明</p></div>
</div></body>
</html>
