.navbar-nav .dropdown-submenu {
    position: relative;
}

.navbar-nav .dropdown-submenu .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -6px;
    margin-left: -1px;
    -webkit-border-radius: 0 6px 6px 6px;
    -moz-border-radius: 0 6px 6px 6px;
    border-radius: 0 6px 6px 6px;
}

.navbar-nav .dropdown-submenu:hover > .dropdown-menu {
    display: block;
}

@media (min-width: 992px) {
    .navbar-expand-lg .navbar-nav .dropdown-menu {
        margin-top: 0;
        border-radius: 0.25rem;
    }

    .navbar-expand-lg .navbar-nav .dropdown-menu-right {
        right: auto;
        left: 0;
    }
}

@media (max-width: 991.98px) {
    .navbar-nav .dropdown-menu .dropdown-toggle::after {
        display: none;
    }
}