<html><head><meta name="viewport" content="width=device-width, initial-scale=1.0"><style>img { max-width: 100%; height: auto;}</style></head><body><img src="/i/photo/shanghai.jpg" width="460" height="306"><p>请调整浏览器窗口的大小，来查看宽度小于 460 像素时图像如何缩放。</p></body></html>