If you don't know each other, send some more conventional gifts. As you said, she pays more attention to maintenance, so I guess she should know more about skin care products, so I suggest you have some better skin care products.
Such as: health tea pillow (helpful to sleep), or some American ginseng, gastrodia elata, etc. Then you can send her some health books.
If not, it is also a warm-hearted move to accompany her to eat a good meal!
I hope I can inspire you!