Subject: L-shaped gradient frosted glass runway, dynamic blue streamline, tech-themed blue-white gradient background. Scene: 3D rendered tech-themed dedicated PPT background scene. Style: C4D cartoon rendering style, overall full of futuristic tech sense. Color tone: The runway transitions in sequence from light yellow, light blue, to dark blue, matched with a white gradient line in the middle, and the background is a soft gradient of tech blue and white. Light and shadow: Overall soft light, the runway has frosted glass transparent texture and obvious highlight effect. Composition: The L-shaped runway is placed at the bottom of the画面，从左下角向右延伸再向上转折且宽度渐宽，画面上半部分充足留白。Usage: Suitable for tech-themed presentation PPT backgrounds, corporate tech report layout base images, and future-style presentation visual illustrations.