Menu fixo em mobile

Referência: https://divilife.com/create-fixed-mobile-menu-divi/

@media (max-width: 980px) {
.et_non_fixed_nav.et_transparent_nav #main-header, .et_non_fixed_nav.et_transparent_nav #top-header, .et_fixed_nav #main-header, .et_fixed_nav #top-header {
position: fixed;
}
}

.et_mobile_menu {
overflow: scroll !important;
max-height: 83vh;
}