xxxxxxxxxx<html><head><meta charset="utf-8"> <title>W3Cschool教程(w3cschool.cn)</title><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>注意:</b> Internet Explorer 不兼容 outline-offset属性.</p><div>这个 div有一个轮廓边界15 px边境外的边缘。</div></body></html>