情侣照片转水彩插画

```json
{
  "generation_request": {
    "meta_data": {
      "task_type": "photo_to_watercolor_illustration_couple",
      "language": "zh-Hans",
      "priority": "highest",
      "version": "v1.0_WATERCOLOR_HEART_COUPLE_HUG"
    },
    "input": {
      "mode": "image_to_image",
      "reference_image_usage": "very_high",
      "preserve_identity": true,
      "preserve_facial_features": true,
      "notes": "将上传的情侣照片转换为迷人的水彩插画。保留相同的情侣身份、姿势关系和整体姿态。转换为手绘水彩画，具有可见的纸张纹理和柔和的颜料晕染效果。"
    },
    "output": {
      "aspect_ratio": "4:5",
      "resolution": "ultra_high",
      "num_images": 1,
      "sharpness": "illustration_crisp",
      "grain": "paper_texture_subtle"
    },
    "style": {
      "medium": "watercolor",
      "linework": "soft_ink_outline_minimal",
      "palette": "warm_pastel_with_rose_red_accents",
      "texture": "cold_press_paper",
      "finish": "clean_white_margins"
    },
    "scene": {
      "background": "情侣身后有一个大的柔和水彩心形，粉色到玫瑰色的晕染，边缘略微不均匀，有细微的颜料飞溅",
      "environment": "白色背景，无详细场景，以插画为重点"
    },
    "subject": {
      "people_count": 2,
      "pose": "浪漫拥抱，男士亲吻女士的脸颊/太阳穴，女士微笑，双眼轻闭，一条腿俏皮地微微抬起",
      "identity_rules": "在转换为插画的同时，尽可能匹配上传情侣的面部和发型",
      "wardrobe_translation": "将原始服装转换为插画风格；保留可识别的关键颜色和图案",
      "props": {
        "bouquet": "{argument name=\"bouquet type\" default=\"red flowers bouquet\"} 在男士手中，用松散的水彩花瓣绘制"
      },
      "details": {
        "skin_render": "柔和的水彩肤色，脸颊有淡淡的腮红",
        "hair_render": "水彩头发，墨水细节极少",
        "hands": "清晰的解剖结构，自然的指节比例，无多余手指"
      }
    },
    "composition": {
      "framing": "全身或 3/4 身体居中",
      "spacing": "周围留有充足的空白空间，插画漂浮在页面上",
      "focus": "情侣面部 + 花束，心形背景为次要焦点"
    },
    "lighting": {
      "type": "illustrated_soft_light",
      "contrast": "low",
      "shadows": "极少的水彩阴影"
    },
    "negative_prompt": [
      "写实",
      "3D 渲染",
      "动漫",
      "厚涂油画",
      "到处都是硬朗的轮廓",
      "杂乱的背景场景",
      "文字、水印、标志、签名",
      "模糊的面部",
      "多余的手指、变形的手、糟糕的解剖结构",
      "重复的人物",
      "过饱和的霓虹色"
    ],
    "quality_rules": {
      "must": [
        "保留情侣身份"
      ]
    }
  }
}
```