I'll create a sticky scrolling animation with stacked cards in React. This will use the Intersection Observer API to create a smooth scrolling effect where cards stick to the viewport as you scroll.

This implementation creates a smooth sticky scrolling animation with stacked cards. Here's how it works:

1. As you scroll down the page, each card will stick to the viewport
2. When the next card comes into view, the previous card will scale slightly down and move up
3. This creates a stacking effect where cards appear to be placed on top of each other
4. The animation uses CSS transforms and transitions for smooth performance

The component uses the Intersection Observer API to detect when each card section enters the viewport, which triggers the animation. The cards have different background colors to make the stacking effect more visible.

To see the animation in action, scroll down the page slowly and watch how the cards stack on top of each other with a smooth transition effect.

I'll create a revised version where the first card appears on top initially, and as you scroll, new cards come in from the bottom and stack on top, with previous cards remaining partially visible underneath.

This revised implementation creates the stacking effect you described:

1. The first card appears on top initially
2. As you scroll down, new cards come into view and stack on top of the previous cards
3. Previous cards remain visible but shift down slightly, creating a staggered stack effect
4. You can see parts of the previous cards underneath the current card

How it works:

• Each card has a trigger section that activates when it enters the viewport
• When a card is triggered, it's added to the "visibleCards" state array
• Cards are positioned with a vertical offset based on their position in the visible cards array
• Higher index cards have higher z-index values, so they appear on top of lower index cards
• As you scroll, new cards come in from below and stack on top of the existing cards

The staggered offset (60px in this implementation) ensures you can see part of each previous card underneath the current one. You can adjust this value to show more or less of the previous cards.

To see the effect, scroll down slowly and watch how each new card appears on top of the stack while previous cards remain partially visible underneath.