效果
antReset.css
.ant-menu-submenu .ant-menu-submenu-popup .ant-menu .ant-menu-light {border: 1px solid #173808 !important;
}/* 直接针对 popup 整体背景 */
.ant-menu-submenu-popup {background-color: #173808!important;
}/* popup 内部的菜单 */
.ant-menu-submenu-popup .ant-menu {background-color: #173808 !important;
}/* popup 内的项颜色 / hover / 选中 */
.ant-menu-submenu-popup .ant-menu-item {color: #fff !important;
}
.ant-menu-submenu-popup .ant-menu-item:hover {background: #3E9067 !important;
}
.ant-menu-submenu-popup .ant-menu-item-selected {background: #3E9067 !important;
}