效果图：
代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style> a { position: relative; display: inline-block; outline: none; text-decoration: none; color: #000; font-size: 32px; padding: 5px 10px; } a:hover::before, a:hover::after { position: absolute; } a:hover::before { content: "\5B"; left: -10px; } a:hover::after { content: "\5D"; right: -10px; } </style> </head> <body> <a>family</a> </body> </html>
原文：http://www.cnblogs.com/luoluo8/p/5880670.html