Subject: Silver-gray autonomous transportation, circular diffusion lines from bottom radar, multi-layer staggered blue viaducts, golden guardrails on bridge decks, silhouettes of a hazy smart city skyline. Scene: Future smart city transportation space, autonomous vehicles traveling on three-dimensional elevated road network, radar rays for intelligent induction scanning, distant urban backdrop with hazy contrast, interpreting the technological artistic conception of safe and reliable intelligent travel, no text elements at all. Style: Futuristic technology 3D rendering texture, minimalist business technology style, high-end and cold atmosphere, clean and grand composition. Tone: Deep blue as the main base, paired with silver-gray vehicle bodies and golden guardrails as accents, unified and calm color scheme, combining a sense of technology and security. Lighting: Fine and three-dimensional lighting on vehicle bodies, radar rays with inherent subtle light and transparent effect, hazy and soft lighting on viaducts and distant urban scenery, overall layers are clean and distinct. Composition: Autonomous transportation is centered as the visual focus, multi-layered viaducts extend to create a sense of depth, distant urban skyline backdrop enhances the atmosphere, simple and balanced layout with concentrated visual focal point. Use: Suitable for autonomous driving technology promotional posters, intelligent transportation technology exhibition boards, main visuals for smart city solutions, tech brand website banners for automotive companies, background materials for future mobility industry conferences.