Neon Castle in the Underground Metropolis

An immense medieval castle perched within an expansive underground city. The castle blends ancient stonework with cyberpunk chrome: neon-lit gargoyles, holographic banners, and fiber-optic runes along weathered walls. Below, a sprawling metropolis of tunnels and caverns glows with electric blues, pinks, and greens. Rain falls as holo-neon reflections ripple on wet cobblestones and chrome walkways. Drones orbit the towers; maglev rails wind around towering pillars; steam vents puff softly. Cinematic, highly detailed, 8k quality lighting, with dramatic neon lighting and volumetric fog for moody noir atmosphere. Perspective from a narrow alley looking up at the castle spires, with citizens in cybernetic armor passing by. Color palette: electric blues, magenta, cyan, and amber. Style: cyberpunk, synthwave, concept art.