我相信以下解决方案会对您有所帮助:-)

I believe below solution would help you :-)

ion-menu {
  --ion-background-color: var(--ion-color-primary);
  --ion-text-color: var(--ion-color-primary-contrast);

  ion-toolbar {
    --background: var(--ion-color-primary);
  }

  ion-list {/* optional, but it needs when you use gradient as a background color.*/
    background: transparent;
  }
}