Use case: product-mockup. Reference image: minimalist beach color gradient only. Create a clean vertical 2:3 tranquil summer beach background: a broad powder-blue sky fading gently lighter toward the horizon, a subtly blurred turquoise sea band at mid height, and fine pale warm sand across the lower third with soft natural ripple texture. Keep the center open and uncluttered for product placement. Photorealistic yet softly dreamy coastal editorial style. Change horizon softness, sand ripple pattern, sky gradient, and reflection details so it is related but not identical. No text, numbers, Chinese characters, watermark, brand logo, tiny edge text, border, white margin, or corner mark.
