Prompt photo publicitaire de yoga minimaliste

3:4 vertical, photo-realistic, minimalist body movement portrait. A clearly adult fictional East Asian woman, about 22-28 years old, standing with her back to the camera in front of a light gray studio wall. The frame only captures from below the shoulders to the upper thigh, no head, face, arms, or lower legs. Body is facing away, spine naturally straight, waist is slender but realistic, with natural transitions between back, waist, pelvis, and buttocks, not exaggerated. She wears a low-saturation dark gray-blue thin-strap sports bra, simple horizontal seams, matte stretch fabric, thin straps, clean back cut; paired with light gray-beige high-waist yoga pants, high waistband covers the upper pelvis, pants fit the waist, buttocks, and thighs, center back seam is clear but not overemphasized, fabric is light, soft, slightly matte, showing real elasticity, seams, slight stretching, and natural wrinkles. Centered symmetrical composition, body nearly fills the frame, waist at the visual center, camera at waist height, slightly looking up. Soft large-area window light or studio softbox from the front left, evenly illuminating the back, waist, and buttock-thigh contours, with a subtle gradient shadow on the right. Overall cool gray, gray-blue, beige-gray, and natural skin tones, low saturation, low contrast, high brightness, quiet, minimalist, with a yoga ad, body line study, and minimalist sports poster feel. 85mm lens, f/4, ISO200, 1/200s, medium depth of field, waist, spine, sports bra, and yoga pants texture are clear. Retain real pores, fine vellus hair, natural skin tone variations, slight soft tissue sag, fabric fibers, and seams; no plastic skin, no over-smoothing, no exaggerated waist-to-hip ratio, no perspective distortion, no extra limbs, no text, logo, watermark, border, or composite.