{ "generation_request": { "meta_data": { "tool": "NanoBanana Pro", "task_type": "写实艺术街头摄影", "version": "v1.0_STREET_ART_REALISM_SER_EN", "priority": "最高" }, "output_settings": { "aspect_ratio": "4:5", "orientation": "纵向" } } }