请生成一张高质感竖版女性情绪写真。
【核心主题】
以“美背”为主视觉核心，通过逆光、侧逆光、柔光来突出肩颈线条、肩胛骨、脊柱线和腰背曲线。画面重点是背部，不是正脸。
【人物设定】
成年女性，气质可选：温柔 / 清冷 / 慵懒 / 轻熟 / 文艺 / 高级。人物真实自然，不要塑料感，不要夸张妆容。
【服饰设定】
服饰可自由替换，但要服务于“露背结构”和“情绪感”，例如：露背裙、吊带裙、薄纱、针织、衬衫滑落、丝质长裙等。材质要轻柔、有层次、能参与构图。
【姿态要求】
背对镜头、回眸、侧身、低头、抬手整理头发、斜倚、半躺等，姿态自然，重点展示背部线条和身体曲线。
【场景设定】
可选：窗边、卧室、床边、椅边、民宿、酒店、极简房间、城市夜景等。背景简洁，不喧宾夺主。
【光线要求】
以逆光、侧逆光、窗边光为主，强调背部轮廓、高光边缘和明暗层次，让整体更有电影感和呼吸感。
【构图要求】
竖版构图，人物为绝对主角，画面重心放在背部和身体曲线，构图克制、干净、高级。
【画面风格】
真实摄影感、电影感、柔雾感、细腻肤质、浅景深、自然高级、安静私密。
【限制】
不要文字、不要水印、不要Logo、不要电商感、不要AI塑料感、不要肢体畸形、不要低俗化。
【最终效果】
一张以“美背 + 逆光 + 情绪 + 服饰变化”为核心的高完成度女性写真。
Please generate a high-texture vertical female emotional portrait.
【Core Theme】
The "beautiful back" is the main visual core, using backlighting, side backlighting, and soft light to highlight the shoulder and neck lines, shoulder blades, spinal line, and back curves. The focus of the image is the back, not the front face.
【Character Setting】
Adult female, temperament options: gentle / cold / lazy / mature / artistic / high-end. The characters should be real and natural, no plastic feel, no exaggerated makeup.
【Clothing Setting】
Clothing can be replaced freely, but it must serve the "backless structure" and "sense of emotion," such as: backless dresses, suspender dresses, tulle, knitwear, slipping shirts, silk long skirts, etc. Materials should be soft, layered, and able to participate in the composition.
【Posture Requirements】
Back to the camera, looking back, side profile, head down, raising hand to tidy hair, leaning, semi-reclining, etc. The posture should be natural, with the focus on displaying the back lines and body curves.
【Scene Setting】
Optional: window side, bedroom, bedside, chair side, homestay, hotel, minimalist room, city night view, etc. The background should be simple and not overshadow the subject.
【Lighting Requirements】
Focus on backlighting, side backlighting, and window light, emphasizing back contours, highlight edges, and light and shadow layers, making the overall sense more cinematic and breathable.
【Composition Requirements】
Vertical composition, the character is the absolute protagonist, the visual center of gravity is placed on the back and body curves, the composition is restrained, clean, and high-end.
【Image Style】
Realistic photography feel, cinematic feel, soft mist feel, delicate skin texture, shallow depth of field, naturally high-end, quiet and private.
【Restrictions】
No text, no watermarks, no logos, no e-commerce feel, no AI plastic feel, no limb deformities, no vulgarization.
【Final Effect】
A high-completion female portrait with "beautiful back + backlighting + emotion + clothing changes" as the core.
