<html><head><meta name="viewport" content="width=device-width, initial-scale=1.0"></head><body><h1>picture 元素</h1><p>调整浏览器窗口大小可加载不同的图像。</p><picture> <source media="(min-width:650px)" srcset="/i/photo/flower-2.jpg"> <source media="(min-width:465px)" srcset="/i/photo/flower-4.jpg"> <img src="/i/photo/flower.gif" alt="Flowers" style="width:auto;"></picture></body></html>