style: id: chalk-lector name: 粉笔板书 name_en: Chalk Lector category: [手绘, 产品, 人物] visual_dna: line: {organic: 84, precision: 16} color: {saturation: 30, warmth: 70} lighting: {softness: 60, contrast: 40} texture: {material: 88, clean: 12} detail: {density: 76} depth: {cinematic: 34} mood: {energy: 48} composition: depth: flat framing: 板书式排布，允许箭头与圈注 subjects: [产品, 人物] models: [GPT Image, Flux] recipe: identity: 黑板粉笔讲解图 line: 粉笔的断续与重描 color: 白、浅黄、淡红三色粉笔 lighting: 教室顶光，黑板轻微反光 material: 黑板、粉笔、干性色粉 texture: 粉末与擦痕 character: 图解化、几何、说明性 atmosphere: 理性、克制、有教学感 negative: [glossy, neon, 3d render, photo] reference_notes: 物理课堂板书 / 老教材插图 constraints: anchor: 主视觉即唯一锚点：粉笔线形态、三色限制与擦痕密度以它为准；新知识点不得画得更干净。 bans: # 按优先级，前置到提示词 - no smooth continuous strokes - no more than three colors in total - no glossy surfaces, no reflections fail_if: - no eraser smudges or chalk dust - no arrows, circles or leader lines interrupt the layout - lines close cleanly with sharp edges pass: 应像一堂课讲完后留在黑板上的图解，可以被拍照带走。