Subject: Futuristic city buildings and complexes composed of light-emitting dots and lines, with neon light-emitting tech elements shaped like clouds, WiFi signals, and location markers floating above the buildings, background features a virtual city outline composed of blurred dots, and foreground is a virtual ground made of dense light points. Scene: Digital virtual future smart city space, presenting a conceptual scene of urban digitalization with everything connected, no real physical elements. Style: Flat tech vector illustration style, minimalist and modern design, with a light cyber-tech texture, elements have neat and concise shapes with clear meanings. Color palette: Overall uses deep and light gradient blue as the main global color, paired with light cyan light-emitting neon elements as visual accents, unified cool tone, prominent tech atmosphere. Lighting: All elements have soft self-illuminating effects, buildings, tech markers, and dot structures all have faint outer-glow halos, no strong light-dark contrast or physical shadows, light perception is transparent and soft. Composition: Centered balanced composition, city buildings and complexes are arranged in the lower-middle part of the frame, tech markers float in the upper-middle area above the buildings, sufficient blue gradient negative space is reserved in the upper and lower parts of the frame, visual focus is concentrated at the center of the frame, overall composition is neat and stable. Use: Can be used as background for tech-themed posters, internet promotion banners, visual backgrounds for smart city-related press conferences, backgrounds for digital business promotional materials.