Photographique en coulisses de concert, figure accroupie

2:3 vertical format, photorealistic backstage or concert live portrait photography. A clearly adult East Asian woman aged 22-28 crouches with her back to the camera at the edge of a large stage, low-angle medium-close to full lower-body composition, subject centered slightly lower, with the image emphasizing the back, waistline, hips, and crouching posture. She has a slender, elongated, naturally curved adult female figure, with visible shoulder blades, spinal groove, and lower back muscle lines that are defined but not overly athletic, and natural realistic skin. Long, thick black straight hair falls naturally to the waist, partially covering the right shoulder and back, with the head slightly lowered, looking toward the front of the stage rather than the camera. She wears an extremely low-back, thin-strap fitted dance dress or camisole top, with a large exposed back area, secured only by very thin straps and side structure; the lower garment is a fitted striped short skirt or hip-hugging shorts, made of horizontal fine-stripe fabric in brown, gray-black, dark red, and a small amount of blue-green, with a low waistline, and the fabric forms natural folds and tension around the hips. The subject adopts a deep squat or kneeling crouch, knees bent, center of gravity lowered, one foot on tiptoe, arms close to the front of the body, with a posture like a candid shot during a performance, not an exaggerated pose. The stage floor is dark gray semi-reflective material, showing subtle light reflections and stage seams. The background is a vast dim concert audience, completely blurred into dark crowds and scattered blue-purple phone light dots. A strong cold white-blue spotlight shines from the upper left, forming a distinct cone-shaped beam and atmospheric haze, with the subject's back and shoulders softly rim-lit from the side-back, while distant purple-pink stage fog light adds subtle color. Overall low-key and restrained, low saturation but with clear local light and shadow, cold blue-gray as the dominant tone, with small amounts of dark purple and warm skin tones. 85mm lens, f/2-2.8, shallow depth of field, subject sharp, audience fully creamy bokeh. Slight ISO800-1600 stage grain, realistic skin pores, fine vellus hair, hair strands, fabric texture, and reflective stage quality, documentary concert backstage/editorial photography, photosynthetic, natural imperfections, no plastic skin, no excessive retouching, no exaggerated anatomy, no text, no logo, no watermark.