fix inline submenu open style

components/menu/style/index.less

@@ -75,7 +75,7 @@
 
   &-item:hover,
   &-item-active,
-  &-submenu-open,
+  &:not(&-inline) &-submenu-open,
   &-submenu-active,
   &-submenu-title:hover {
     color: @primary-color;
@@ -395,7 +395,7 @@
   &-dark &-item:hover,
   &-dark &-item-active,
   &-dark &-submenu-active,
-  &-dark &-submenu-open,
+  &-dark:not(&-inline) &-submenu-open,
   &-dark &-submenu-selected,
   &-dark &-submenu:hover,
   &-dark &-submenu-title:hover {