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<!DOCTYPE html> <html> <head> <style> img.background { width: 100%; height: 100%; position: absolute; left: 0px; top: 0px; z-index: -1; filter: blur(35px); } img.circle { border-radius: 50%; display: block; margin: 0 auto; height: auto; max-width: 60%; } </style> </head> <body> <h1>filter 属性</h1> <p>背景模糊：</p> <img class="background" src="/i/photo/tulip.jpg" alt="Tulip" width="300" height="300"> <img class="circle" src="/i/photo/tulip.jpg" alt="Tulip" width="300" height="300"> <p><b>注释：</b>Edge 12 或 Internet Explorer 不支持 filter 属性。</p> </body> </html>