Editing Openai/694f5245-1110-800b-b182-7c2accd50046 (section)

==== 把這段放在最上面，後面再貼各機體/FX 的分段 prompt： ====

GLOBAL ART SPEC
* Style: crisp pixel art, “pseudo-64bit” look (visible pixels, slightly grainy/dithered metal shading), SD mecha (cute proportions but hard-surface mechanical detail).
* View: isometric-ish 45-degree, NOT top-down.
* Output: sprite sheet with fixed grid 96×96 per frame.
* Directions: only NE and SE (NW/SW will be mirrored in code).
* Background: true transparent alpha (no matte, no black/white background).
* Consistency: same outline thickness, same palette discipline, same lighting direction.
* Cropping: tight but consistent padding, keep center aligned across frames (avoid jitter).

FRAME REQUIREMENTS (per direction)
* idle: 1 frame
* move: 4-frame loop
* shoot_rifle: 2 frames
* boost: 3 frames (Optional: provide muzzle flash as separate FX sheet)