將照片轉換為畫布藝術作品的提示

```json
{
  "generation_request": {
    "meta_data": {
      "task_type": "photo_to_square_canvas_artwork_only",
      "language": "zh-TW",
      "priority": "highest",
      "version": "v1.1_DIRECT_CANVAS_ART_ONLY"
    },
    "input": {
      "mode": "image_to_image",
      "reference_image_usage": "very_high",
      "preserve_identity": true,
      "preserve_facial_features": true,
      "notes": "將上傳的情侶照片轉換為僅限方形畫布的繪畫藝術品。無產品設置。最終圖像應僅為繪製的畫布設計本身，居中且乾淨。保持情侶可辨識，但簡化為溫暖的手繪插畫風格。"
    },
    "output": {
      "aspect_ratio": "1:1",
      "resolution": "ultra_high",
      "num_images": 2,
      "sharpness": "high",
      "grain": "subtle_canvas_texture"
    },
    "canvas_art_style": {
      "art_medium": "acrylic illustration on canvas",
      "texture": "visible canvas fabric weave",
      "linework": "clean ink outline",
      "coloring": "soft painted fills with gentle shading",
      "finish": "real hand-painted canvas look"
    },
    "canvas_design": {
      "background_color": "muted lavender or soft pastel tone",
      "pattern": "small scattered white or light heart doodles",
      "couple_pose": "romantic close seated embrace similar to uploaded photo",
      "edge_detail": "subtle white outline around couple illustration"
    },
    "subject_rules": {
      "identity": "match the uploaded couple’s facial structure and hair",
      "expressions": "warm affectionate smiles with soft blush",
      "hands": "correct anatomy, natural interaction",
      "wardrobe_translation": "simplified illustrated version of original outfits"
    },
    "composition": {
      "centered": true,
      "clean_background": true,
      "no_external_objects": true
    },
    "negative_prompt": [
      "product photography",
      "easel",
      "wood slice",
      "candle",
      "room background",
      "3d render",
      "anime style",
      "watercolor wash",
      "text",
      "logo",
      "watermark",
      "extra fingers",
      "deformed hands",
      "blurry"
    ],
    "quality_rules": {
      "must": [
        "only the square canvas artwork visible",
        "canvas texture clearly visible",
        "couple recognizable",
        "clean illustration lines",
        "romantic warm tone",
        "no extra objects around"
      ]
    }
  }
}
```