Create an 8k HD, high-quality, futuristic poster design for an 'AI Showcase' event hosted by an AI society. The background features a sleek, modern cityscape with glowing neon accents and circuit patterns, symbolizing the fusion of technology and human society. In the foreground, a large, abstract AI brain is illuminated with bright blue, purple, and pink lights, composed of intricate, interconnected nodes and wires, representing the complexity and intelligence of AI. Surround the brain with floating holographic elements, streams of digital data, and 3D geometric shapes, creating a dynamic and high-tech atmosphere. The overall look is clean, modern, and vibrant with sharp, detailed features that stand out, leaving space at the top for event text and information.
