[Template: Simple Deck] [Intent] Clean, generic horizontal-swipe deck (pitch / overview / study). [Layout]
- Cover + N content pages + closing (N is determined by the length of [User Content], fully covering every key point; start with 6-10 for short content, and use more for long content)
- One core message per page + 1 image / 1 chart
- Top progress bar [Design Details]
- Keyboard ← / → to switch + hash sync