p.main_404{width:400px;margin:140px auto;text-align:center;}
p span.main_404_desc{float:left;margin-top:50px;font-size:26px;font-weight:bold;color:#666;}
p span.main_404_back{float:left;margin:50px 0 70px 135px;font-size:18px;font-weight:bold;border-radius:3px;width: 130px;height: 36px;line-height: 36px;background-color:#00b350;}
p span.main_404_back a{color:#fff;}