Please add this code in custom.css file of parent theme or in style.css of child theme:
.main-nav .menu > li .nav-sublist-dropdown .container > ul > li ul li.item-level-2>a,
.fixed-header .menu > li .nav-sublist-dropdown .container > ul > li ul li.item-level-2>a {
font-size: 14px !important;text-transform: uppercase !important;font-family: Georgia !important;list-style: none !important;
}
.main-nav .menu > li .nav-sublist-dropdown .container > ul > li ul li.item-level-2:before,
.fixed-header .menu > li .nav-sublist-dropdown .container > ul > li ul li.item-level-2:before {
display:none;
}
.main-nav .menu > li .nav-sublist-dropdown .container > ul > li .nav-sublist ul li ul li a,
.fixed-header .menu > li .nav-sublist-dropdown .container > ul > li .nav-sublist ul li ul li a {
font-size: 13px !important;
}
