Create a detailed digital illustration of a highly advanced humanoid robot, showcasing a head and upper torso design that intertwines sleek, futuristic aesthetics with intricate mechanical complexity. The robot's face should mimic human features but with a cold, metallic finish. Its head should be partially open, revealing the sophisticated network of circuits, gears, and components that power its artificial intelligence. Use a monochromatic color scheme with varying shades of silver and gray