Luxury Fashion Portrait on Modern Staircase

Create an ultra-realistic luxury lifestyle fashion portrait using the uploaded reference as the STRICT identity source; preserve 100% exact facial structure, face shape, skin tone, hair, beard density, age, proportions and recognizable identity with zero alteration, beautification or drift. Apply this style naturally whether reference is male or female. Subject walking down a modern metal staircase mid-stride, body leaning slightly forward. Right hand adjusting thin-metal round dark sunglasses; left hand in trouser pocket. Calm, serious expression. Pastel mint/sage quarter-zip knit sweater, partially open zipper, visible knit texture, ribbed cuffs/hem; crisp white cargo trousers with left-thigh flap pocket; silver chain and rectangular smartwatch with white strap. Silver railings and diagonal stairs, lush slightly yellow greenery with red flowers, soft natural bokeh. Diffused daylight, balanced skin tones, clean whites, rich greens, subtle reds, soft yellow premium grading. Medium-full, centered slightly off-axis, 50mm f/1.4, shallow DOF, creamy blur, natural anatomy, realistic motion. Editorial old-money luxury, 8K. No distortion, stretching, warping, harsh shadows, overexposure. 4:5 vertical.