
<html>
<head>
    <style>
        body {
            margin: 0;
            padding: 0;
            background: url('/image/404.jpg') no-repeat center center fixed;
            background-size: cover;
        }
        @media (max-width: 768px) {
            body {
                background-size: contain;
            }
        }
    </style>
</head>
<body></body>
</html>