Subject: The core of the画面 is blue waves composed of flowing light bands, with a city skyline silhouette above the waves, presenting a tech-savvy urban landscape. Scene: Blue gradient background, with fine particles and vertical line light effects, creating a futuristic urban tech atmosphere. Style: Modern tech-style business background design, with light effect particle texture, a visual style commonly used in urban, tech, and finance scenarios. Color tone: Dominated by blue, gradient from light blue to dark blue, the light bands have bright white highlights, overall color tone is clean and bright, full of tech sense. Light and shadow: The light bands have flowing glow effects, the background light and shadow fade from the center to the surroundings, highlighting the fluidity of the waves and the sense of hierarchy of the city silhouette. Composition: Center-symmetric horizontal composition, waves converge from the left and right to the center, the city silhouette is located in the center of the画面, overall balanced and stable, with a sense of depth. Use: Suitable for urban / tech theme PPT backgrounds, corporate business posters, financial industry promotional materials, images related to urban construction, and backgrounds for tech product displays.