A dynamic sports-themed background with vibrant, energetic colors. A modern athletic running track with smooth curves and perspective depth. Multiple abstract silhouettes of athletes running and sprinting, no facial details. Background filled with bold color splashes, gradient blends of blue, orange, yellow, green, and red merging smoothly like paint strokes. Motion lines and light effects to show speed and energy. Clean central empty space for adding text later. High contrast, vector-style illustration, poster-ready, bright lighting, inspirational sports event backdrop, modern graphic design, no text, no watermark.
