Main subject: Futuristic city building complex composed of luminous dots and lines, with neon luminous tech elements in the shapes of clouds, WiFi signals, and location markers floating above the buildings; background features a blurred virtual city outline made of dots; foreground is a virtual ground composed of dense light points. Scene: Digital virtual future smart city space, presenting the urban digital concept scenario of everything interconnected, with no real physical elements. Style: Flat tech vector illustration style, minimalist and modern design, with light cyber-tech texture, concise and neat element shapes, clear expression. Tone: Overall uses gradient blue shades as the main global color, paired with light cyan luminous neon elements as visual accents, unified cool tone, prominent tech atmosphere. Lighting: All elements have soft self-illumination effects, buildings, tech markers, and dot structures carry faint outer glow halos, with no strong contrast and physical shadows, transparent and soft light feel. Composition: Centered balanced composition, city building complex arranged in the lower-middle part of the frame, tech markers floating in the upper-middle area above the buildings, sufficient blue gradient negative space reserved in the upper and lower parts of the frame, visual focus concentrated at the center, overall composition neat and stable. Use: Can be used as a background for tech-themed posters, internet promotion banners, smart city-related conference visuals, and digital business promotional materials.