Gemini Nano Banana Pro 提示词： { "image_type": "摄影作品", "genre": "都市生活肖像", "composition": { "framing": "四分之三身位肖像", "angle": "平视，正面拍摄", "orientation": "竖构图", "subject_placement": "主体位于画面中心偏右", "background": "[background]" }, "subject": { "description": "[subject]", "attire": "[attire]", "expression": "[expression]" }, "lighting": { "type": "自然光", "quality": "柔和的漫射光", "mood": "cinematic，温暖且富有质感" }, "technical_specs": { "camera": "35mm 镜头", "aperture": "f/1.8", "effect": "浅景深，奶油般虚化的 bokeh 背景", "quality": "8K 分辨率，超高清，细节丰富" } }