拳击馆运动员细节肖像

3:4 vertical dramatic athlete portrait of a young boxer leaning against a chain-link fence inside an old industrial boxing gym, illuminated by a single high-contrast Rembrandt-style window light from the upper left. Sweat beading on the brow and bare shoulders, hand wraps still on, intense focused gaze just past the camera. Dark moody background with a faded out-of-focus heavy bag in the corner. Vertical 3:4 framing, head and chest. No brand logo on the wraps, no gym signage, no watermark. Cinematic sports portraiture quality, photorealistic skin sweat detail and dust-lit air.