Undersea Neon Knight: A Cyberpunk Robot in Ruined City

An underwater cyberpunk scene: a sleek humanoid robot patrols a submerged city street, chrome plating gleaming through the blue-green water. Its body features exposed hydraulics, cybernetic joints, and glowing circuit traces in electric cyan and magenta. Ruined megastructures rise behind a veil of coral and kelp; neon billboards flicker with holographic rain, casting rainbows on rusted rails and shattered glass. Bioluminescent particles drift as bubbles ascend in slow swirls; a school of glowing fish and a translucent jellyfish drone weave around the robot's visor HUD. Moody, cinematic lighting with reflections on wet metal conveys a forgotten, high-tech metropolis lost to the depths.