Subject: Modern high-speed train traveling on a cross-sea track, paired with logistics drones, freight vehicles, and urban buildings, no text. Scene: Smart transportation and logistics scene of a coastal city, background is sea surface and hazy urban skyline. Style: Flat technology illustration style, with vector illustration texture of digital light effects. Color palette: Fresh cool blue as the main color, paired with the white of the train and a small amount of warm color accents, overall bright and transparent. Lighting: Soft and even flat light, no strong shadows, supplemented by tech-savvy blue halos and light spot effects. Composition: Diagonal perspective composition, the train extends from the left to the right of the frame, logistics elements and urban buildings on the right balance the frame, creating a sense of extension of the transportation network. Use case: For promotional illustrations and concept displays with themes such as smart logistics, intelligent transportation, urban rail transit, digital economy, etc.