㊣User Agent Style Sheets
http://www.iecss.com/
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8" /> <title></title> <style type="text/css"> input{border:none;} input{border:2px inset #FFF;} </style> </head> <body> <input type="file" /> </body> </html>
