.index404{background:url(../img/404.22b534b7.jpg);background-attachment:scroll;background-repeat:no-repeat;background-position:50%;background-color:#f8f8f8;height:100%;width:100%;border:0;margin:0;padding:0;position:relative}.index404_btn{position:absolute;left:50%;margin-left:-110px!important;top:50%;margin-top:120px!important;width:220px;height:40px;background:transparent}