Subject: The main subject of the image is a flat illustration-style cable-stayed bridge tower structure, paired with multi-layered geometric triangular mountain ranges and a mirror-like water reflection below, presenting a simple geometric landscape of mountains and rivers with the bridge. Scene: A misty, tranquil outdoor mountain-and-water scene, with a gradient blue sky paired with hazy layered mountains, calm water reflecting the bridge's outline, creating a cool and quiet early morning foggy atmosphere. Style: Retro grainy gradient flat geometric illustration, low-poly minimalist architectural landscape design, with a grainy print texture, simple and high-end modern healing-style poster painting. Color palette: Full set of blue gradient colors, transitioning from deep sea blue at the top to light cyan, mint light blue, the bridge uses pure white and dark blue for contrast, unified and soft single tones, cool and clean. Lighting: Flat gradient with no solid hard shadows, shaping the layering of mountains and the bridge through color depth gradation, overall light is even and soft, with a misty, transparent and hazy texture. Composition: Vertical upper-lower layered composition, the bridge body is centered and slightly below, geometric mountains cover the area behind the bridge, large areas of gradient sky are left blank at the top, water reflection at the bottom balances the picture, vertically stretched and clean, no text. Use case: Suitable for urban cultural tourism promotion posters, simple landscape decorative paintings, weather app splash screens, travel cultural and creative covers, minimalist social media graphics, bridge engineering enterprise promotional materials.