Winter Candid on a Subway Platform

【Subject】A fictional 20-year-old adult East Asian woman with a fresh, energetic college-student vibe, clearly an adult; height 185cm, long legs, a full and athletic figure, a generous bust, a slim waist, firm hips and thighs, distinct yet natural hourglass curves, natural proportions; a soft face with slightly rounded cheeks, clear, bright round almond-shaped eyes that curve into crescents when she smiles, naturally straight brows, dewy pale pink lips, and very light makeup; long black hair half-up in a princess style, secured with a lemon-yellow butterfly clip, with the rest falling straight down her back; a cherry-red fitted spaghetti-strap top (close-fitting stretch ribbed fabric), black high-waisted, skin-tight yoga pants reaching the ankles (not flared), and bright lemon-yellow patent-leather Mary Jane shoes; no coat indoors, no coat draped over her shoulders.
【Scene and Action】A subway platform on a morning in early winter, outside the yellow safety line, as a train pulls in and stirs up a gust of wind; a candid moment as she laughs at her windblown hair while holding freshly purchased hot soy milk in one hand, her head turned toward the arriving train, not looking at the camera; blurred platform pillars and waiting passengers behind her.
【Visual Style】Casual iPhone snapshot.
【Composition and Lens】Vertical 2:3, medium shot from the knees up, eye-level camera, subject on the right third, with about 40% on the left for the arriving train; 35mm, f/1.8, subtle film grain.
【Lighting and Color】Soft, diffused light from cool-white ceiling strips on the platform, combined with warm side light from the train's headlights to create a rim light; bright areas of the face are luminous, with delicate layers in the shadows; primary colors cherry red and black, paired with the cool gray of the platform; lemon yellow accents; color temperature around 5200 K, natural, luminous skin tone.
【Material Details】Realistic pores, fine facial hair, natural highlights, a faint blush on the cheeks, slight asymmetry between the two sides of the face, catchlights in the eyes, fine lines on the lips, individually defined eyebrows, natural-looking light makeup; stretchy ribbed texture on the camisole, subtle wrinkles in the matte yoga-pant fabric, mirror-like reflections on the patent-leather Mary Janes; dense hair strands and flyaways; condensation on the soy-milk cup, reflections in the train windows, reflections on the tiled floor, and the subject's shadow.
【Negative Constraints】Plastic skin, doll-like face, influencer face, excessive airbrushing, beauty filters, heavy makeup, 3D-rendered look, distorted features, extra fingers, awkward anatomy, floating subject, color cast, text, watermark, coat, or coat draped over her shoulders.

【主体设定】虚构的20岁成年东方女性，清新元气的大学生气质，明显是成年人；身高185cm，长腿，身材丰盈健美，上围饱满，腰线纤细，臀腿线条紧致，沙漏型曲线明显而自然，自然比例；脸型柔和，略带苹果肌，清澈明亮的圆杏眼，笑起来眼睛弯弯，眉形自然平直，水润淡粉唇，妆容极淡；黑色长发半扎公主头，用柠檬黄色蝴蝶发夹固定，其余长发顺直披在背后；樱桃红色细肩带修身吊带上衣（贴身弹力罗纹面料），黑色高腰紧身瑜伽裤贴腿到脚踝（非喇叭裤），正柠檬黄色彩色漆皮玛丽珍鞋；室内不穿外套，不披外套。
【场景动作】立冬早晨的地铁站台，黄色安全线外，列车正进站带起一阵风；她单手拿着刚买的热豆浆，被风吹起的发丝逗得笑出声的抓拍瞬间，侧头看向进站的列车，没有看镜头；身后是站台立柱和候车的人群虚影。
【视觉风格】iPhone 随手抓拍。
【构图镜头】2:3竖版，膝上中景，平视机位，人物位于右三分线，左侧约40%留给进站的列车；35mm，f/1.8，轻微胶片颗粒。
【光影色彩】站台顶部冷白灯带的柔和散射光，加列车车头灯的暖色侧光形成一圈轮廓光，脸部亮部通透、阴影层次细腻；主色樱桃红、黑，配站台冷灰；跳色柠檬黄；色温约5200K，肤色自然通透。
【材质细节】真实毛孔、细小绒毛、自然高光，脸颊淡淡红晕，左右脸轻微不对称，眼睛有反光，唇上有细纹，眉毛根根分明，素颜感淡妆；罗纹吊带的弹力肌理，瑜伽裤哑光面料有细微褶皱，漆皮玛丽珍的镜面反光；发丝细密有碎发；豆浆杯壁水汽，列车玻璃反射，地砖倒影和人物投影。
【负面约束】塑料皮肤、娃娃脸、网红脸、过度磨皮、美颜滤镜、浓妆、3D渲染感、五官变形、多余手指、肢体不协调、人物悬浮、画面偏色、文字、水印、外套、披在肩上的外套。