Young Man Mountain Bike Portrait Golden Hour

16K ultra-realistic cinematic 4:5 full-body portrait using the uploaded reference as a strict identity lock; preserve the exact same face, hairstyle, and facial features with no alteration. An 18-year-old handsome young man stands on a mountain road beside a black mountain bike, one hand firmly on the handlebar, the other casually in his pocket, body slightly turned toward camera, confident composed expression. Road stretches behind him through lush green trees under warm golden sunlight; bright sky with subtle cinematic lens flare. Outfit: white oversized printed T-shirt, light-gray cargo pants, white sneakers, black cap. Ultra-detailed textures, lifelike lighting, rich cinematic tones, sharp realistic details, professional premium photography.