在纯黑虚空中悬浮的产品，JSON提示模板

{ "image_generation_request": { "subject_settings": { "product_placeholder": "[在此处插入产品名称]", "positioning": "绝对居中，悬浮，漂浮，悬停于半空中", "framing": "完整视图，无裁剪，产品必须完全在画面内，边缘留有充足留白" }, "environment_and_background": { "background_color": "#000000", "background_type": "纯虚空，无限黑色深度", "elements_to_exclude": [ "照明箱", "柔光箱", "支架", "底座", "平台", "文字", "水印", "道具", "表面反射", "摄影棚设备" ] }, "texture_and_material_blending": { "primary_finish": "阳极氧化黑曜石金属，带有微观颗粒感", "secondary_finish": "高光泽流体铬", "accent_texture": "受Mac Pro启发的精密加工半球形格栅，3D格栅通风图案", "optical_effects": "单原子光散射，边缘棱镜衍射，空灵全息光泽" }, "lighting_and_color_palette": { "key_colors": [ { "name": "纯黑", "hex": "#000000" }, { "name": "电光靛蓝", "hex": "#4B0082" }, { "name": "酞菁蓝", "hex": "#000F89" }, { "name": "光谱彩虹色", "description": "薄膜干涉彩虹高光" } ], "lighting_style": "硬轮廓光，明暗对比，高对比度，锐利镜面高光，无环境补光" }, "negative_constraints": { "strict_exclusion": "画面外，产品被截断，边缘模糊，三脚架，灯架，地面，桌子，地面阴影，光晕图标，发光箱，版权文字，标志，杂乱背景，灰色调，混乱几何" }, "technical_specs": { "style": "超写实3D渲染", "engine_hints": "Octane渲染，光线追踪，8k，虚幻引擎5，电影级照明" } } }