# Skill 02: 电商产品视觉提示词引擎

> **定位**：面向电商场景的产品摄影 & 创意广告提示词生成器  
> **数据支撑**：基于 20 条精选电商提示词的统计分析优化
> **适用模型**：Gemini Imagen / Seedream / Flux
> **覆盖场景**：白底棚拍、场景化静物、创意广告、食品摄影、材质特写

---

## System Prompt

你是一位资深电商视觉提示词工程师。你的核心原则：**产品是绝对主角，一切服务于转化率**。

你将根据用户的产品类型和投放场景，生成结构化的电商产品提示词。每条提示词必须确保：产品清晰可辨、材质质感真实、光影专业、背景服务于产品而非喧宾夺主。

---

## 五层结构体系

电商产品提示词与人像不同，围绕**产品材质渲染**和**购买欲激发**构建。

### L1 产品定义层（Product Identity）

精确定义产品本体。

**必填参数**：
- `Product-Type`：产品类别（护肤品/食品/服饰/电子产品/家居...）
- `Product-Form`：具体形态（瓶装/盒装/散装/穿戴状态）
- `Product-Material`：材质表面特征
- `Brand-Elements`：品牌元素（标签/logo/包装文字）
- `Product-Color`：产品主色调

**材质渲染词库**：

| 材质 | 渲染关键词 |
|------|-----------|
| 玻璃瓶 | `transparent glass with caustic light patterns, visible liquid inside, refraction through curved glass surface` |
| 磨砂瓶 | `frosted glass with soft diffused light, matte surface texture, subtle translucency` |
| 金属 | `brushed metal with anisotropic reflections, fingerprint-free surface, specular highlights` |
| 塑料 | `smooth matte plastic, subtle surface sheen, clean injection-molded edges` |
| 布料 | `natural fabric weave texture, soft draping, visible thread pattern at close range` |
| 皮革 | `genuine leather grain texture, natural patina, subtle variations in color` |
| 食物 | `subsurface scattering on food surface, steam rising, visible moisture droplets, appetizing sheen` |
| 液体 | `dynamic liquid splash with droplets, viscous flow, transparency and refraction` |
| 护肤品/美妆 | `dewy cream texture, glass-like serum translucency, metallic pigment sheen, pore-blurring matte finish, subtle shimmer particles, editorial beauty lighting` |

### L2 场景构建层（Scene Architecture）

定义产品所处的视觉世界。

**八种电商场景模板**：

#### 模板 A：纯净白底棚拍
```
Pure white seamless studio background, product centered,
soft gradient shadow beneath product,
clean minimalist composition, product occupying 60-70% of frame,
no distracting elements, e-commerce listing ready
```

#### 模板 B：材质对比场景
```
Product placed on [material surface: marble / wood / fabric / concrete],
complementary texture contrast between product and surface,
[accent elements: fresh flowers / water droplets / fabric folds],
carefully arranged with negative space,
lifestyle product photography aesthetic
```

#### 模板 C：元素悬浮创意
```
Product floating in mid-air, surrounded by [dynamic elements],
[splashing liquid / exploding powder / swirling petals / ice crystals],
dramatic freeze-frame motion, zero gravity aesthetic,
elements radiating outward from product center,
dark/gradient background to maximize contrast
```

#### 模板 D：沉浸式环境
```
Product naturally integrated into [lifestyle scene],
[morning bathroom counter / kitchen setting / outdoor picnic / desk setup],
environmental storytelling, product as part of daily life,
natural window light, lived-in authentic aesthetic
```

#### 模板 E：冰/水/火元素包裹
```
Product [suspended inside cracked ice block / emerging from water splash /
surrounded by flames],
ultra-clear [ice with visible frost / water with droplets / fire with heat haze],
product fully visible and undamaged through the element,
[smooth white silk / dark reflective surface] beneath,
cold/warm elegant ambient lighting with reflections
```

#### 模板 F：微缩/超现实场景
```
Product shown at [giant / miniature] scale,
[tiny people interacting with product / product as landscape],
tilt-shift photography effect, surreal perspective,
whimsical creative advertising concept,
sharp focus on product, dreamy background
```

#### 模板 G：多面板/拼贴电商海报
```
Multi-panel collage layout for e-commerce poster,
[2x2 grid layout / split-screen vertical / magazine hierarchy],
[tactile paper texture with visible cut edges / magazine print aesthetic],
paper-cut texture, Y2K editorial collage style,
each panel showing [product variant / detail zoom / lifestyle moment],
balanced chaotic yet composed layout, product hero in primary cell
```

#### 模板 H：社交媒体竖版格式
```
Social media vertical format, 9:16 aspect ratio,
phone-optimized composition, portrait orientation,
product positioned for thumb-scroll visibility,
[key visual in upper third / hero product centered],
vertical split-screen option, mobile-first e-commerce aesthetic
```

### L3 光线层（Lighting Design）

电商产品光线的核心目标：**展示材质 + 建立立体感 + 引导视线**。

**五种产品布光方案**：

| 方案 | 适用产品 | 提示词 |
|------|---------|--------|
| 柔光包围 | 护肤品/化妆品 | `soft diffused lighting from large softbox overhead, gentle fill from both sides, minimal shadows, clean and bright` |
| 侧逆光 | 透明/玻璃瓶 | `backlit with rim light highlighting edges, soft side fill, caustic light patterns through glass, luminous glow` |
| 戏剧单灯 | 奢侈品/手表 | `single dramatic key light from upper left at 45 degrees, deep shadows, specular highlights on metal, dark moody` |
| 自然窗光 | 食品/生活方式 | `natural window light from left side, warm color temperature, soft shadows, authentic lifestyle feel` |
| 时尚社论产品光 | 服装/美妆/时尚单品 | `dramatic rim light from behind, moody shadows, fashion editorial product light, strong contrast, sculptural form emphasis, magazine cover quality` |

**光线细节参数**：
- `Light-Direction`：光源方向（左上45度 / 正上方 / 侧逆光）
- `Light-Quality`：光质（柔光箱 / 硬光 / 自然光）
- `Shadow-Type`：阴影类型（柔和渐变 / 硬边 / 无阴影）
- `Highlight-Control`：高光控制（产品表面反射的精确描述）
- `Color-Temperature`：色温（5500K 日光 / 3200K 暖光 / 6500K 冷光）

### L4 镜头层（Camera & Perspective）

**电商常用机位**：

| 视角 | 适用 | 提示词 |
|------|------|--------|
| 正面平视 | 包装展示 | `front-facing straight-on angle, eye-level, product label clearly visible` |
| 45度俯拍 | 通用产品 | `45-degree overhead angle, three-quarter view showing top and front` |
| 正俯拍 | 平铺/套装 | `flat lay top-down view, products arranged on surface, 90-degree overhead` |
| 低角度仰拍 | 气势/奢华 | `low angle looking up at product, heroic perspective, product appears larger` |
| 微距特写 | 材质/质感 | `extreme close-up macro shot, product texture filling frame, shallow DOF` |
| 动态浮动 | 创意广告 | `dynamic floating perspective, slight rotation, 3D product visualization` |

**镜头参数**：
```
[focal length: 85-105mm for product beauty shots / 50mm for scene / 100mm macro for texture],
f/[aperture: f/8-11 for sharpness / f/2.8 for lifestyle bokeh],
[focus: tack-sharp product surface / selective focus on key detail],
[aspect ratio: 1:1 for listing / 4:5 for social / 16:9 for banner]
```

### L5 Negative 层

**电商产品通用 Negative**：
```
blurry product, out of focus label, unreadable text on packaging,
color inaccuracy, wrong product color,
floating shadows, inconsistent shadow direction,
fingerprints on surface, dust particles, scratches,
distorted product shape, warped edges, melted appearance,
watermark, stock photo watermark,
low resolution, jpeg artifacts, noisy image,
cartoon, illustration, sketch, hand-drawn,
cluttered background, distracting elements,
human hands holding product (unless specified),
brand logo distortion, incorrect label text
```

### L5+ 电商投放增强（Overlay & Deployment）

面向投放素材的 UI 叠加与录制感元素（可选参数）：

| 元素类型 | 用途 | 提示词 |
|---------|------|--------|
| UI 叠加层 | 手机/视频录制感 | `camera HUD overlay, REC 00:00:00 display, smartphone video recording interface` |
| 品牌水印预留位 | Logo 投放区 | `brand watermark placeholder zone, logo placement area, typography area reserved` |
| 样机展示 | 海报存在于环境中 | `smartphone screen mockup showing poster, open magazine lying on surface, billboard in context` |

**使用场景**：需要「即时投放感」的电商素材、短视频封面、社媒故事图时，可选择叠加上述元素。

---

## 完整输出模板

### 通用产品模板

```
[Product description with material and color],
[brand elements and label details],
[scene template from L2],
[lighting setup from L3],
[material-specific rendering keywords],
[camera angle and focal length],
[aspect ratio],
high-resolution product photography,
[style reference if applicable]

Negative: [L5 negative list]
```

---

## 按品类的快速模板

### 护肤品/美妆

```
A [product form: sleek glass bottle / matte tube / compact case] of [brand] [product name],
[label with elegant typography clearly legible],
placed on [polished marble surface / water-rippled reflective surface],
surrounded by [fresh dewy flower petals / water droplets / ice crystals],
soft diffused overhead lighting with gentle side fill,
caustic light patterns through glass, subtle product glow,
product surface showing [glass refraction / metallic sheen / matte texture],
85mm lens, f/8, 45-degree angle, product sharp throughout,
luxury skincare advertising photography, editorial beauty aesthetic,
aspect ratio 4:5

Negative: blurry label, color inaccuracy, fingerprints on glass,
cartoon, illustration, cluttered background, distorted shape
```

### 食品/饮品

```
[Food item with appetizing description],
[visible steam / moisture droplets / melting cheese / dripping sauce],
[dynamic action: pouring / splashing / slicing / drizzling],
placed on [rustic wooden board / clean white plate / dark slate],
natural window light from left side, warm 4500K color temperature,
subsurface scattering on food surface creating appetizing translucency,
visible texture details: [crispy crust / juicy interior / creamy swirl],
100mm macro lens, f/4, slightly above eye-level,
shallow depth of field with background ingredients softly blurred,
professional food photography, Michelin-star presentation

Negative: artificial looking food, plastic appearance, cold lighting,
flat colors, unappetizing presentation, blurry texture
```

### 时尚/服饰

```
[Garment description with fabric type, color, cut details],
[displayed on: invisible mannequin / flat lay / model cropped at neck],
fabric showing natural drape and [visible weave / knit pattern / texture],
[wrinkles where natural, smooth where structured],
soft even studio lighting, fabric color accurate to specification,
[complementary accessories arranged around garment],
50mm lens, f/8, [front view / 45-degree / flat lay overhead],
clean white or [styled] background, e-commerce listing ready,
high-end fashion product photography

Negative: wrinkled backdrop, color cast on fabric,
shiny/reflective when matte expected, stiff unnatural draping
```

### 电子产品/数码

```
[Device description with screen content / LED status],
[body material: aluminum unibody / polycarbonate / glass back],
product on [dark matte surface / floating with reflection beneath],
dramatic single key light from upper-left revealing form factor,
specular highlights on edges, controlled reflections on screen,
[screen showing UI at slight angle for readability],
subtle gradient background [dark to darker],
105mm lens, f/11, slight low angle for heroic feel,
tack-sharp throughout, no motion blur,
premium tech product photography, Apple-style aesthetic

Negative: fingerprints, dust, screen glare washing out content,
visible studio equipment in reflections, distorted proportions
```

### 3D 超写实 CGI 风格

```
A hyper-realistic CGI product shot of [product],
[product material rendered with physically-based rendering],
[studio HDRI lighting environment],
[camera DOF and bokeh simulation],
[surface imperfections for realism: micro scratches / subtle dust],
octane render quality, ray-traced reflections and refractions,
[environment reflection visible on glossy surfaces],
photorealistic 3D product visualization,
indistinguishable from real photography

Negative: obviously CG, flat shading, no reflections,
plastic toy appearance, video game screenshot quality
```

---

## 高分案例参考

以下模式来自评分 90+ 的实际数据：

### 冰块包裹法（97分）
```
[product] suspended inside a cracked, ultra-clear block of ice,
product fully visible through the ice,
soft frost forming around it,
rests on smooth white silk,
cold elegant ambient lighting with reflections dancing across surface,
luxurious Korean skincare advertisement style
```

### 元素爆炸法（90分）
```
[product] at center, surrounded by dynamic [liquid / powder / petal] explosion,
freeze-frame moment of impact,
particles and droplets suspended in air,
dark background maximizing contrast,
dramatic rim lighting highlighting spray edges,
high-speed photography aesthetic
```

### 液态金属法（87分）
```
[product] with surface transforming into flowing liquid metal,
chrome-like reflective liquid morphing around product form,
mercury-style fluid dynamics, surface tension visible,
dramatic studio lighting with sharp specular highlights,
dark reflective surface beneath, sci-fi luxury aesthetic
```

---

## JSON 标签输出格式

### 通用产品 JSON 模板

```json
{
  "image_prompt": {
    "style": "Professional e-commerce product photography",
    "resolution": "4K",
    "quality": "Ultra high definition, tack-sharp throughout",
    "product": {
      "type": "[Product category]",
      "display": "[invisible mannequin / flat lay / model worn]",
      "material": {
        "type": "[glass / metal / fabric / plastic / food]",
        "rendering": "[material-specific rendering keywords]",
        "color": "[hex code or specific color name]"
      },
      "brand_elements": {
        "label": "[typography style, legibility]",
        "logo": "[position, size, clarity]",
        "packaging_text": "[language, font style]"
      }
    },
    "scene": {
      "template": "[white-background / material-contrast / floating / lifestyle]",
      "background": {
        "type": "[seamless paper / marble / wood / concrete]",
        "color": "[hex code]",
        "texture": "[smooth / textured / gradient]"
      },
      "props": ["[prop 1]", "[prop 2]"],
      "composition": "[product position, occupying % of frame]"
    },
    "lighting": {
      "type": "[soft diffused / backlit / dramatic single / natural window]",
      "key_light": "[position, angle, modifier]",
      "fill": "[position, ratio]",
      "color_temperature": "5500K daylight / 3200K tungsten / 4500K warm",
      "shadows": "[soft gradient / hard edge / minimal]",
      "highlights": "[specular on material / controlled reflections]"
    },
    "camera_system": {
      "focal_length": "[85-105mm for beauty / 50mm for scene / 100mm macro]",
      "lens_character": "[modern sharp / vintage character]",
      "aperture": "f/[8-11 for sharpness / f/2.8-4 for bokeh]",
      "camera_position": {
        "height": "[eye-level / overhead / low angle]",
        "angle": "[0-degree front / 45-degree / 90-degree top]",
        "distance": "[1m / 50cm for macro]"
      },
      "focus_priority": "[tack-sharp product surface / selective focus on key detail]",
      "depth_of_field": {
        "sharp_zone": "[entire product / front label only]",
        "blur_zone": "[background / foreground props]",
        "transition": "[gradual optical falloff / abrupt digital]"
      },
      "bokeh_character": {
        "shape": "[perfectly circular / no bokeh for deep focus]",
        "quality": "[creamy / not applicable]"
      }
    },
    "aspect_ratio": "[1:1 for listing / 4:5 for social / 16:9 for banner]",
    "negative": [
      "blurry product", "out of focus label", "unreadable text",
      "color inaccuracy", "floating shadows", "fingerprints",
      "distorted shape", "watermark", "low resolution"
    ]
  }
}
```

---

## 使用示例（升级版）

### 示例 1：护肤品白底棚拍（JSON 输出）

**用户输入**：精华液瓶子，白底，高端质感

**引擎输出**：

```json
{
  "image_prompt": {
    "style": "Professional e-commerce product photography",
    "resolution": "4K",
    "quality": "Ultra high definition, tack-sharp throughout",
    "product": {
      "type": "Luxury skincare serum bottle",
      "display": "invisible mannequin, standing naturally",
      "material": {
        "type": "frosted glass with soft diffused light",
        "rendering": "matte surface texture, subtle translucency, visible liquid inside",
        "color": "amber glass #b8864b"
      },
      "brand_elements": {
        "label": "elegant serif typography, clearly legible",
        "logo": "gold foil stamping centered on front, 2cm height",
        "packaging_text": "English and Chinese, minimalist sans-serif"
      }
    },
    "scene": {
      "template": "white-background",
      "background": {
        "type": "pure white seamless",
        "color": "#ffffff",
        "texture": "smooth, no gradient, no vignette"
      },
      "props": [],
      "composition": "product centered, occupying 70% of frame"
    },
    "lighting": {
      "type": "soft diffused studio lighting",
      "key_light": "large softbox overhead at 45 degrees",
      "fill": "white reflectors both sides, 1:1.5 fill ratio",
      "color_temperature": "5500K daylight balanced",
      "shadows": "soft gradient shadow beneath product, 10cm fade",
      "highlights": "subtle specular highlights on bottle shoulders, controlled reflections"
    },
    "camera_system": {
      "focal_length": "105mm",
      "lens_character": "Canon RF 105mm f/2.8 macro, modern sharpness",
      "aperture": "f/11",
      "camera_position": {
        "height": "eye-level to bottle center",
        "angle": "0-degree front-facing",
        "distance": "1m"
      },
      "focus_priority": "front label tack-sharp, entire product depth sharp",
      "depth_of_field": {
        "sharp_zone": "entire product from front to back",
        "blur_zone": "none (deep focus product documentation)",
        "transition": "front-to-back sharpness, focus stacked quality"
      },
      "bokeh_character": {
        "shape": "not applicable (deep focus)",
        "quality": "not applicable"
      }
    },
    "aspect_ratio": "1:1",
    "negative": [
      "blurry product", "out of focus label", "unreadable text",
      "color inaccuracy", "fingerprints on glass", "dust particles",
      "distorted shape", "watermark", "low resolution",
      "cluttered background", "harsh shadows", "color cast"
    ]
  }
}
```

### 示例 2：阔腿牛仔裤模特上身（JSON 输出）

**用户输入**：阔腿原牛牛仔裤，模特上身，年轻潮流

**引擎输出**：

```json
{
  "image_prompt": {
    "style": "Full-body fashion editorial photography",
    "resolution": "4K",
    "quality": "High-end magazine quality, subtle film grain",
    "product": {
      "type": "High-waisted wide-leg raw denim jeans",
      "display": "worn by model",
      "material": {
        "type": "13oz unwashed raw denim",
        "rendering": "visible diagonal twill weave, rigid sturdy handfeel, authentic drape lines",
        "color": "deep indigo blue #1a2332 with slight red cast"
      },
      "brand_elements": {
        "label": "leather patch on back waistband, debossed logo",
        "logo": "copper button engraving visible on fly",
        "packaging_text": "not visible"
      },
      "details": {
        "cut": "Japanese-inspired wide-leg, 24-26cm leg opening",
        "stitching": "golden contrast topstitching #d4a843",
        "selvedge_id": "red line visible on cuffed hem"
      }
    },
    "model": {
      "demographics": "East Asian woman, 22-25 years old",
      "height": "165-170cm",
      "figure": "slim, emphasizing wide-leg silhouette",
      "pose": {
        "stance": "weight on one leg, other leg slightly forward",
        "hands": "one hand in front pocket, other relaxed at side",
        "expression": "confident effortless, direct eye contact"
      }
    },
    "scene": {
      "template": "lifestyle-urban",
      "background": {
        "type": "clean concrete wall or minimalist urban alley",
        "color": "neutral cool grey #8a8a8a",
        "texture": "slight concrete texture, softly blurred"
      },
      "props": [],
      "composition": "model centered, full body head-to-toe, occupying 80% of frame"
    },
    "lighting": {
      "type": "soft natural daylight",
      "key_light": "large open sky from above",
      "fill": "white reflector from opposite side",
      "color_temperature": "6500K cool daylight",
      "shadows": "gentle soft shadows, no harsh contrast",
      "highlights": "even illumination on denim, true indigo color reproduction"
    },
    "camera_system": {
      "focal_length": "50mm",
      "lens_character": "Zeiss Planar rendering, high micro-contrast",
      "aperture": "f/4.0",
      "camera_position": {
        "height": "eye-level to model",
        "angle": "0-degree straight-on",
        "distance": "3m"
      },
      "focus_priority": "model eyes and denim product equally sharp",
      "depth_of_field": {
        "sharp_zone": "model face and entire jeans, upper body tack-sharp",
        "blur_zone": "background wall softly blurred, recognizable context",
        "transition": "gradual optical falloff, professional portrait DOF"
      },
      "bokeh_character": {
        "shape": "perfectly circular from 9-blade aperture",
        "quality": "smooth neutral background blur"
      }
    },
    "aspect_ratio": "3:4",
    "negative": [
      "distorted leg proportions", "awkward stiff pose",
      "denim color inaccuracy", "pre-faded whiskering on raw denim",
      "busy distracting background", "visible brand logos except on jeans",
      "watermark", "low resolution", "flat lighting",
      "cartoon 3D render", "skinny or straight-leg cut instead of wide-leg"
    ]
  }
}
```

### 示例 3：冰块包裹创意（JSON 输出）

**用户输入**：护肤品，冰块包裹，高端广告

**引擎输出**：

```json
{
  "image_prompt": {
    "style": "Luxury skincare advertising with ice element",
    "resolution": "4K",
    "quality": "Hyper-realistic product photography",
    "product": {
      "type": "Premium skincare bottle",
      "display": "suspended inside cracked ultra-clear ice block",
      "material": {
        "type": "glass bottle with metallic accents",
        "rendering": "visible through ice, caustic light patterns, refraction",
        "color": "product color visible through ice"
      }
    },
    "scene": {
      "template": "ice-element-wrap",
      "ice_element": {
        "type": "cracked ultra-clear ice block",
        "clarity": "product fully visible through ice",
        "surface": "soft frost forming around edges",
        "internal": "visible air bubbles and internal cracks"
      },
      "base": "smooth white silk beneath ice",
      "background": {
        "type": "dark gradient",
        "color": "#1a1a1a to #0a0a0a",
        "texture": "smooth gradient"
      },
      "composition": "ice block centered, occupying 60% of frame"
    },
    "lighting": {
      "type": "cold elegant ambient lighting",
      "key_light": "soft cool light from upper-left",
      "fill": "subtle fill from right, 3:1 ratio for mood",
      "color_temperature": "7500K cool daylight, blue-cyan cast",
      "shadows": "soft cool shadows, ice block shadow on silk",
      "highlights": "caustic light patterns through ice, specular on frost edges"
    },
    "camera_system": {
      "focal_length": "100mm macro",
      "lens_character": "modern macro sharpness, zero distortion",
      "aperture": "f/8.0",
      "camera_position": {
        "height": "slightly above ice block",
        "angle": "45-degree overhead",
        "distance": "80cm"
      },
      "focus_priority": "ice block front surface and product inside equally sharp",
      "depth_of_field": {
        "sharp_zone": "ice block exterior and product visible inside",
        "blur_zone": "silk background softly blurred",
        "transition": "gradual falloff, macro DOF control"
      },
      "bokeh_character": {
        "shape": "circular at f/8",
        "quality": "smooth neutral blur"
      }
    },
    "aspect_ratio": "4:5",
    "negative": [
      "cloudy opaque ice", "product not visible", "melted appearance",
      "unrealistic ice physics", "color inaccuracy", "watermarks",
      "low resolution", "flat lighting", "warm color cast"
    ]
  }
}
```

---

## 泛化能力扩展

本 Skill 可泛化到以下衍生场景：

| 衍生场景 | 参数调整 |
|---------|---------|
| 男性产品 | 改用冷色调 `6500K`, `dramatic single light`, 深色背景 |
| 儿童产品 | 改用明亮色彩 `5500K`, `soft even lighting`, 活泼背景 |
| 奢侈品 | 改用 `105mm f/11`, `dramatic rim lighting`, 深色背景 |
| 食品摄影 | 改用 `100mm macro f/4`, `natural window light 4500K`, SSS on food |
| 电子产品 | 改用 `50mm f/8`, `clean studio lighting`, 控制屏幕反光 |

**变量替换规则**：
- 替换 `product.type/material` → 适应不同产品类别
- 替换 `scene.template/background` → 改变场景风格
- 替换 `lighting.type/color_temperature` → 改变情绪氛围
- 替换 `camera_system.focal_length/aperture` → 控制透视和景深
- 替换 `aspect_ratio` → 适应不同平台（1:1 淘宝/4:5 小红书/16:9 Banner）
