#gnv_menu #gnv_menu_home { float:left; width:172px; height:55px; background:url(/image/common_menu.jpg) 0px -55px no-repeat; }
#gnv_menu #gnv_menu_home:hover { width:172px; height:55px; background:url(/image/common_menu.jpg) 0px 0px no-repeat; }
#gnv_menu #gnv_menu_home a { width:172px; height:55px; display:block; text-indent:-9999px; }

#gnv_menu { width:860px; margin:0px auto 0px auto; height:55px; }
#gnv_menu ul { width:860px; height:55px; margin:0px; padding:0px; list-style:none; }

#gnv_menu #gnv_menu_about { float:left; width:172px; height:55px; background:url(/image/common_menu.jpg) -172px -55px no-repeat; }
#gnv_menu #gnv_menu_about:hover { width:172px; height:55px; background:url(/image/common_menu.jpg) -172px 0px no-repeat; }
#gnv_menu #gnv_menu_about a { width:172px; height:55px; display:block; text-indent:-9999px; }

#gnv_menu #gnv_menu_design { float:left; width:172px; height:55px; background:url(/image/common_menu.jpg) -344px -55px no-repeat; }
#gnv_menu #gnv_menu_design:hover { width:172px; height:55px; background:url(/image/common_menu.jpg) -344px 0px no-repeat; }
#gnv_menu #gnv_menu_design a { width:172px; height:55px; display:block; text-indent:-9999px; }

#gnv_menu #gnv_menu_plan { float:left; width:172px; height:55px; background:url(/image/common_menu.jpg) -516px -55px no-repeat; }
#gnv_menu #gnv_menu_plan:hover { width:172px; height:55px; background:url(/image/common_menu.jpg) -516px 0px no-repeat; }
#gnv_menu #gnv_menu_plan a { width:172px; height:55px; display:block; text-indent:-9999px; }

#gnv_menu #gnv_menu_flow { float:left; width:172px; height:55px; background:url(/image/common_menu.jpg) -688px 0px no-repeat; }
#gnv_menu #gnv_menu_flow a { width:172px; height:55px; display:block; text-indent:-9999px; }