Realistic campus athlete portrait red track

9:16 vertical, realistic natural life photography, highly realistic outdoor sports portrait, combining mobile documentary style with natural portrait texture. The main subject is a clearly adult young Chinese female, visual age about 22–25 years old, standing on a campus outdoor sports field next to a red plastic running track, having just finished a light run or warm-up exercise, the body is in a brief pause state, breathing feels natural, the overall temperament is energetic, bright, healthy, and lighthearted. 

The subject uses a close-up environmental composition from the chest up, the body is slightly angled towards the camera, shoulders naturally opened backwards, the head is slightly tilted to one side and turned towards the camera, forming a natural shoulder and neck twist relationship. The subject looks up directly at the camera, corners of the mouth naturally turned up, revealing a small amount of neat teeth, the smile is refreshing and approachable, not overly radiant, not a deliberate pose. The frame retains the direction of the subject's body movement and the extension of the track space, suitable as a reference first frame for subsequent videos of turning the head, raising a hand to tidy hair, stepping, and jogging forward. 

The subject has a compact and rounded small oval face, facial contours are natural and smooth, cheeks slightly full, the jawline is soft and clear, the chin is small but not excessively sharp. Features are delicate and bright, with a natural sense of vitality; eyes are clear round almond eyes, the gaze focus is real, pupils are dark brown, iris texture is naturally visible, corneal reflections from overcast sky light, eyes have a natural moistness and real luster, no glowing pupils. Eyebrows are natural with real hair flow; the nose bridge is delicate and smooth, the tip of the nose is rounded and natural, the nostril structure is real; lips are soft and natural, lip lines are clear, light pink lip color, makeup is a thin sports "no-makeup" look. 

Skin is of highly realistic texture, overall healthy and delicate but not perfect, retaining small pores on the forehead, nose bridge, cheeks, and around the nostrils, fine peach fuzz, slight uneven skin tone, a small amount of faint redness, fine lines under the eyes, and natural sebum reflections. The skin texture of the face, neck, and shoulders is consistent but not identical, retaining slight real color differences. After exercise, the skin has a slight damp feel, with a small amount of fine sweat beads and natural moisture reflections visible on the forehead, cheeks, neck, collarbone, shoulders, and chest, sweat is unevenly distributed, not excessive, does not form dense water droplets, no artificial spray texture. 

The subject's black long hair is tied into a slightly loose high ponytail or mid-high ponytail, a few strands of hair are loose after running, several slightly damp stray hairs near the forehead and sides of the face are close to the skin, the ponytail hangs naturally backwards, hair volume and weight feel real, not neat, no professional studio styling used. The edges of the hair are illuminated by soft sky light, hair layers are clear. 

The subject wears a light misty blue slim-fit sports tank top, shoulder straps are simple, fits the body but not overly tight, the fabric shows real sports fabric texture, with a small amount of natural sweat stains from exercise near the chest and neckline, color changes are slight and irregular. The clothing naturally expresses the contours of the shoulders, neck, collarbone, and upper body, overall healthy and sporty feel, not intentionally sexy. 

Background is a campus or urban outdoor sports field, a red plastic running track extends in a curve from behind the subject, on the right is a green soccer field or sports lawn, in the distance are trees, school buildings, stadium light poles, and blurred buildings. The background retains real environmental information but uses natural shallow depth of field blur, the subject's facial features and skin texture are the primary visual focus. The weather is overcast or soft early morning, sky light evenly illuminates the subject's face, the light is soft and clean, no strong hard shadows, the face, nose bridge, eyes, jaw, neck, and collarbone form delicate and natural light and shadow layers. 

Real photography perspective, equivalent to around a 50mm portrait focal length, close range but not using extreme wide-angle, facial proportions are natural, nose not excessively enlarged. High-definition details, real pores and sweat texture, slight candid snapshot feel, the image is transparent, clean, and natural, not gray or hazy, no excessive color grading, no commercial retouching filters. 

Negative constraints: Influencer face, plastic surgery template face, juvenile/underage look, Westernized features, chin too pointy, exaggerated large eyes, glowing pupils, glass bead eyes, heavy fake eyelashes, heavy makeup, fake smile, stiff expression, perfectly symmetrical face, plastic skin, ceramic skin, wax figure skin, excessive skin smoothing, skin texture loss, uniform pores across the face, sandpaper skin, acne and blemish pile-up, too many sweat beads, face full of water droplets, artificial water spray effect, excessive oiliness, HDR too strong, over-sharpening, extreme wide-angle, enlarged nose, neat and stiff hair, wig-like feel, plastic clothing texture, excessive background blur, distorted track, distorted body, wrong shoulder/neck structure, subtitles, logo, watermark.