How to reverse the scroll decoration while using CustomLayoutOption

[Hasuer]

Hi,
I got a question in how to change the scroll decoration while using CustomLayoutOption.

As the pic showed, there are three items in the swiper, and when I move my finger from bottom to top on the screen, what I want is the card labeld "1" would move up and fade, but now the card labeled "2" would move down from the top of screen and stack over the card labeled "1". How can I fix this?

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