Hi there!
Sorry for the inconvenience.
Please use the following code in your custom CSS:
.sp-megamenu-parent .sp-dropdown li.sp-menu-item>a, .sp-megamenu-parent .sp-dropdown li.sp-menu-item span:not(.sp-menu-badge) {
font-family: 'Roboto Condensed', sans-serif;
font-size: 18px;
color: #252525;
}
Note: Path towards custom CSS: Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.
Hope this will solve the issue for you!
Best Regards