Subject: Streamlined white high-speed train, cross-sea viaduct, mirror-like blue sea, modern urban skyline, glass curtain wall buildings, continuous distant mountains on the left, outline of cross-sea bridge, golden morning light atmosphere elements. Scene: Coastal future city shrouded in dawn, high-speed train galloping on cross-sea viaduct, sea surface quiet as a mirror, urban transportation natural scene where distant mountains, long bridge and urban skyline complement each other and coexist. Style: Modern realistic illustration, simple and grand, integrating urban infrastructure texture and future urban aesthetics. Tone: Based on fresh blue and white tones, paired with orange-yellow warm tones of morning glow for embellishment, cold and warm blending, clean and elegant. Light and shadow: Golden morning light diffused and spread, building glass curtain walls reflecting warm light, overall light soft and transparent, sea surface light and shadow calm and delicate, light and dark transition natural. Composition: Panoramic open composition, train in the visual center of the画面, cross-sea viaduct extending horizontally, distant mountains and urban skyline with progressive layers, strong spatial depth, having both sense of order and expansiveness. Use: Suitable for coastal city transportation promotion, high-speed rail infrastructure posters, future urban concept design, cultural and tourism promotion materials, urban development PPT background.