.t-submenu:before,
.t-menu__submenu:before {
    display: none !important;
}

.t-menu__submenu,
.t-menu__submenu-list {
    background: transparent !important;
    box-shadow: none !important;
    border: none !important;
}

.t-menu__submenu-item {
    background: transparent !important;
    padding: 10px 20px !important;
}

.t-menu__submenu-item:hover {
    background: rgba(255,255,255,0.1) !important;
}