迭代式镜头切换 85mm（Edit Prompt 工作流）

Style: Continuation of a previous Sora 2 generation. Maintain the locked aesthetic — same wardrobe, same set dressing, same color grade. Only change what is specified below.

Reference: same subject, same location, same lighting setup as the original clip.

Cinematography (changes only):
- Same shot, switch to 85mm
- Shallower depth of field; tighter framing on the subject's eyes and hands
- Keep camera height and angle identical to the original

Actions (unchanged):
- Subject performs the original action exactly as before; do not re-block, do not re-light

Background Sound: Identical to the original — diegetic only, no added score.

Production note: this is an EDIT prompt, not a fresh generation. Pin the original as reference and describe only the change ("same shot, switch to 85mm"). Sora 2 Edit endpoint: POST /v1/videos/{video_id}/edits.