超模拟胶片偷拍浪漫场景

```json
{
  "meta": {
    "project": "analog_bridge_kiss_city_bokeh",
    "style": "ultra_analog_film_candid_romance",
    "aspect_ratio": "4:5",
    "output_type": "single_image",
    "priority": "highest"
  },
  "scene": {
    "location": "{argument name=\"location\" default=\"pedestrian bridge / waterfront promenade at dusk\"}",
    "environment": "水对岸的城市天际线，远处高楼柔和模糊，桥梁结构在右侧形成一条深色对角引导线",
    "time": "蓝色时刻（日落后）",
    "weather": "晴朗，空气凉爽",
    "mood": "亲密、随性、充满生活气息的夜晚"
  },
  "subjects": {
    "couple": {
      "pose": "紧密地站在栏杆旁，亲吻",
      "woman": {
        "appearance": "短发，深色，别在耳后，淡雅的自然妆容",
        "wardrobe": "深色夹克，极简首饰",
        "action": "亲吻时左手轻抚他的后脑勺/颈部，表情平静柔和"
      },
      "man": {
        "appearance": "波浪形中长发，浅浅的胡茬",
        "wardrobe": "米色/棕色皮夹克内搭白色 T 恤，深色牛仔裤，细链项链",
        "action": "身体微微后仰靠在栏杆上，姿态放松，一只手放在臀部/栏杆附近"
      }
    }
  },
  "composition": {
    "framing": "中近景，情侣略微偏右居中，栏杆在腰部可见，背景为城市天际线散景",
    "foreground": "微妙的深色渐晕 / 边缘遮挡，如同电影片门或遮光罩",
    "background": "柔和的城市灯光形成圆形散景，水面几乎不可见，桥梁结构形成醒目的对角线"
  },
  "camera": {
    "lens": "35mm 复古定焦镜头（或等效 50mm），大光圈",
    "aperture_feel": "f/1.8–f/2.0 浅景深",
    "focus": "焦点锁定在面部和嘴唇；背景严重虚化",
    "exposure": "高光略微欠曝以保护细节；无过曝天空",
    "stabilization": "手持纪录片感，稳定（无抖动）"
  },
  "analog_look": {
    "film_stock": "{argument name=\"film stock\" default=\"Kodak Portra 800 (blue-hour friendly) OR Cinestill 800T vibe (very subtle halation)\"}",
    "grain": "明显但自然的胶片颗粒",
    "contrast": "中低对比度，黑色提亮，高光柔和过渡",
    "color": "冷蓝色环境阴影 + 暖色皮肤；柔和的琥珀色实用灯光",
    "halation": "仅在远处点光源周围有微妙光晕（不夸张）",
    "lens_character": "轻微柔和，边缘有轻微色差，边角有柔和的亮度衰减",
    "imperfections": "微小灰尘斑点，轻微的片门抖动感，非常轻微的渐晕"
  },
  "texture_fidelity": {
    "skin": "真实的毛孔，自然的光泽，无塑料感平滑",
    "leather": "夹克上有可见的纹理、褶皱和铜绿",
    "fabric": "T 恤棉质编织可见，夹克内衬有微妙纹理",
    "hair": "独立的股发和飞发，无结块"
  },
  "constraints": {
    "perfect_anatomy": true,
    "correct_hands": true,
    "no_extra_fingers": true
  }
}
```