为何图2整体会变小?
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div{
width: 500px;
height: 200px;
border: 30px solid rgba(255, 0, 0, 1);
padding: 50px;
background: url("http://img1.sycdn.imooc.com/climg//582c342b0001fd6507000210.jpg");
background-clip: padding-box;
}
div:hover{
background: url("http://img1.sycdn.imooc.com/climg//582c34220001091605000150.jpg")no-repeat 10px 10px;
background-origin:content-box;
background-clip: content-box;
border: 30px solid rgba(255, 0, 0, 0.6);
}
</style>
</head>
<body>
<div>
</div>
</body>
</html>








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