Looking Back While Cycling on a Sunny Seaside Path

主题：晴天海边步道上，她骑着单车慢行，从肩后回头看镜头的一瞬间，明亮自然的户外日常照片感。
主体：20多岁的成年女性，黑棕色长发扎成松松的高马尾，有轻薄的空气感刘海，几缕碎发被海风吹到脸旁，明亮的奶油桃色肤色，脸颊带一点淡淡的红。
人物与表情：脸转向画面右侧肩后，杏仁形的眼睛回头看向镜头，嘴唇微张露出一点上齿，像被人叫住时刚回头的样子，眼神有点无辜，只看到侧后方的半张脸。
服装与姿势：白底浅蓝小碎花修身细肩带吊带，领口一圈荷叶边，下摆短到腰线；浅雾蓝雪纺半身裙，长度到大腿中部，裙摆被海风吹得向一侧自然飘起，里面是同色安全短裤。她骑在白色单车上，双手握着车把，上身微微前倾，腰背呈自然的 S 形，一条腿踩在踏板上，另一条腿脚尖轻点地面，单车半停半行。
背景与光线：上午十点左右的晴天，蓝天里有几朵白云；画面左侧是白色木栏杆和低矮的海草，右侧是延伸向远处的浅蓝海面和细白沙滩，步道向远处延伸，尽头是一座小小的白色灯塔。阳光从画面右上方照下来，头发和肩膀有暖金色轮廓光，裙摆被阳光照得通透，路面上有清晰的单车影子。
构图与镜头：竖版3:4，机位在她正后方偏右一点，腰部到胸口高度，平视拍摄，看得到她的背影、回头的侧脸和单车后半部分，人物占画面七成，取景从头顶到小腿，50mm 浅景深，背景的海和灯塔轻微虚化。
质感与风格：自然的户外写真照片感，色彩清爽通透，布料褶皱和发丝细节真实，像手机随手抓拍到的一张。
负向约束：脸上不要偏黄，不要橙色或黄色滤镜，被遮挡的部分不要补画，不要额外加表情。

Theme: On a sunny seaside path, she cycles slowly, looking back over her shoulder at the camera in a fleeting moment, with the bright, natural feel of an everyday outdoor photograph.
Subject: An adult woman in her twenties, with long black-brown hair tied in a loose high ponytail, light, airy bangs, and a few stray strands blown beside her face by the sea breeze; bright creamy peach skin with a faint blush on her cheeks.
Person and expression: Her face turns back over her shoulder toward the right side of the image, her almond-shaped eyes looking back at the camera, lips slightly parted to reveal a little of her upper teeth, as if she has just turned when someone called to her; her gaze is a little innocent, and only half of her face is visible from the rear side.
Clothing and pose: A fitted spaghetti-strap camisole with a white base and a tiny pale-blue floral print, a ruffled neckline, and a hem cropped to the waist; a pale mist-blue chiffon skirt reaching mid-thigh, its hem naturally blown to one side by the sea breeze, with matching safety shorts underneath. She rides a white bicycle with both hands on the handlebars, leaning her upper body slightly forward, her waist and back forming a natural S curve; one foot is on a pedal, and the toes of the other lightly touch the ground, with the bicycle half stopped and half moving.
Background and lighting: A sunny day at around ten in the morning, with a few white clouds in the blue sky; on the left are a white wooden railing and low sea grasses, and on the right a pale-blue sea and fine white beach extending into the distance. The path stretches into the distance, ending at a small white lighthouse. Sunlight shines from the upper right of the image, giving the hair and shoulders a warm golden rim light; the skirt is translucent in the sunlight, and a clear bicycle shadow falls on the path.
Composition and lens: Portrait 3:4, with the camera directly behind her and slightly to the right, at a height between her waist and chest, shooting straight ahead. Show her back, her side profile as she looks back, and the rear half of the bicycle. She occupies seventy percent of the frame, cropped from the top of her head to her lower legs; 50mm, shallow depth of field, with the sea and lighthouse in the background slightly blurred.
Texture and style: The natural photographic feel of an outdoor portrait, fresh, clear colors, realistic fabric folds and hair-strand details, like a casual snapshot taken on a phone.
Negative constraints: No yellowish cast on her face, no orange or yellow filter; do not draw in occluded parts, and do not add an extra expression.