51help TIY
码：
<!DOCTYPE html> <html> <head> <style> div { margin:20px; width:150px; padding:10px; height:70px; border:2px solid black; outline:2px solid red; outline-offset:15px; } </style> </head> <body> <p><b>注释：</b>Internet Explorer 和 Opera 不支持 support outline-offset 属性。</p> <div>这个 div 之外 15 个轮廓。</div> </body> </html>
查看结果: