超近景写实情侣自拍，脸颊心形彩绘

```json
{
  "generation_request": {
    "meta_data": {
      "tool": "NanoBanana Pro",
      "task_type": "photorealistic_close_couple_selfie",
      "version": "v1.0_SOFT_HEART_CHEEK_SELFIE_MAXLOCK",
      "priority": "high"
    },
    "references": {
      "female_reference_image": "UPLOAD_FEMALE_REFERENCE (REQUIRED)",
      "male_reference_image": "UPLOAD_MALE_REFERENCE (REQUIRED)",
      "reference_rules": {
        "exactly_two_references_only": true,
        "preserve_identity_female": true,
        "preserve_identity_male": true,
        "identity_lock_strength_female": 0.995,
        "identity_lock_strength_male": 0.995,
        "strict_face_match": true,
        "no_identity_drift": true,
        "no_face_morphing": true,
        "no_beautification": true
      }
    },
    "output_settings": {
      "aspect_ratio": "1:1",
      "resolution_target": "ultra_high_res",
      "render_style": "photorealistic_soft_film_selfie",
      "sharpness": "natural",
      "film_grain": "subtle_analog",
      "dynamic_range": "natural_not_hdr"
    },
    "hard_constraints": [
      "仅限两人。",
      "面部必须与上传的参考图完全匹配。",
      "极近距离构图（面部充满画面）。",
      "无文字、无标志、无水印。",
      "自然皮肤纹理（无塑料感）。"
    ],
    "creative_prompt": {
      "scene_summary": "超近距离写实情侣自拍。情侣脸颊紧贴，充满画面。每人脸颊上都画有半颗手绘红色爱心，当脸颊接触时形成一颗完整的爱心。柔和、亲密、青春的氛围，带有怀旧胶片美学。",
      "composition": {
        "framing": "特写，面部在额头和下巴处裁剪",
        "pose": "脸颊贴脸颊，放松且充满爱意",
        "expression": "温柔微笑，眼神平静，自然真挚的情感"
      },
      "details": {
        "face_paint": "简单的 {argument name=\"heart color\" default=\"red\"} 手绘爱心，略有瑕疵，哑光质感",
        "skin": "自然毛孔，脸颊微红",
        "lips": "柔和珊瑚色/桃色调，自然妆效",
        "eyes": "自然睫毛，淡妆"
      },
      "lighting": {
        "type": "柔和室内环境光",
        "quality": "均匀、柔和、无强烈阴影",
        "tone": "暖中性"
      },
      "style": {
        "look": "90 年代/Y2K 休闲自拍",
        "texture": "轻微胶片颗粒，色彩略显柔和",
        "retouching": "极简，真实"
      }
    },
    "negative_prompt": [
      "身份漂移",
      "换脸伪影",
      "过度平滑的皮肤",
      "塑料感皮肤",
      "浓妆",
      "美颜滤镜",
      "模糊的眼睛",
      "变形的面部特征",
      "多余人物",
      "文字",
      "标志",
      "水印",
      "卡通",
      "动漫",
      "CGI 渲染"
    ]
  }
}
```