@media screen and (max-width:980px){
    #gui #gui_sub #gui_header_main .gui_module_nav.gui_nav_header li[data-gui-nav-depth='0'] {font-size:15px;}
}

#gui .gui_module.gui_module_nav.gui_nav_header .sub-menu .sub-menu {display:none;}
#gui .gui_module_nav.gui_nav_header .sub-menu .menu-item:hover .sub-menu {display:block;position:absolute;left:100%;top:0;}