.content{width:1000px;height:600px;margin:auto}.kf_center{margin-top:30px;}.kf_center .nav{width:100px;height:30px;line-height:30px;background:url("//r.syyx.com/kefu/btns.png") no-repeat -175px -39px;}.kf_center .nav span{margin-left:30px;color:#fe7e01;font-weight:bold}.kf_center .games{width:950px;height:300px;margin-top:10px;padding:30px 0 0 50px;border-top:#fec101 1px solid;background-color:#fff}.kf_center .kf_game{width:200px;height:270px;margin-left:10px;float:left;}.kf_center .kf_game a{margin:auto}.kf_center .game_btn{width:106px;height:31px;display:block}.kf_center a.nycs{background:url("//r.syyx.com/kefu/btns.png") no-repeat -16px -198px;}.kf_center a.nycs:hover{background-position:-16px -229px}.kf_center a.lz{background:url("//r.syyx.com/kefu/btns.png") no-repeat -123px -198px;}.kf_center a.lz:hover{background-position:-123px -229px}.normal_problem{clear:both;margin-top:10px;}.normal_problem .nav{width:100px;height:25px;line-height:25px;background:url("//r.syyx.com/kefu/btns.png") no-repeat -175px -9px;}.normal_problem .nav span{margin-left:30px;color:#fe7e01;font-weight:bold}.normal_problem .helps{width:950px;height:130px;margin-top:10px;padding:30px 0 0 50px;border-top:#fec101 1px solid;background-color:#fff}.normal_problem .help_info{float:left;margin-right:40px;text-align:center;}.normal_problem .help_info a.msg,.normal_problem .help_info a.msg:visited{color:#373737}.normal_problem .help_info a.msg:hover{color:#fd9204}