产品海报：浅景深太阳镜

Ultra-realistic fashion product poster in a studio with a solid {argument name="background color" default="mustard-yellow"} seamless backdrop (smooth paper cyclorama). A young man stands mid-frame, slightly right, wearing a light beige/grey blazer over a white t-shirt, clean modern look. He is smiling subtly, face slightly soft focus. Hero foreground: his arm fully extended toward the camera, holding black glossy wayfarer-style sunglasses by the top rim, centered-left in the frame. The sunglasses are tack sharp with crisp reflections and a starburst glint on the lens (specular sparkle), showing realistic glass density and frame texture. Strong depth: product sharp, subject blurred behind. Lighting: hard-ish sunlit studio look with a strong key light from upper-left creating defined shadows on the jacket and background, minimal fill, high contrast but clean. Camera: 50mm / portrait perspective with close focus on the sunglasses, shallow depth of field, premium commercial photography, 4K, ultra-detailed, clean CREATE PICTURE 3:4 ratio.