W3School TIY Editor
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<!DOCTYPE html> <html> <head> <style media="screen AND (max-width:500px)" type="text/css"> a { background-color: grey; color: white; padding: 15px; font-size:40px; } </style> <style media="screen AND (min-width:500px)" type="text/css"> a { color: red; font-weight: 400; font-size:40px; } </style> </head> <body> <h1>style media 属性</h1> <p>请调整窗口尺寸，查看链接样式的变化：</p> <p><a href="/index.html" target="_blank">W3School</a></p> </body> </html>