Submarine Concept Art in a Robotic Factory

Ultra-detailed concept art of a submarine suspended in a colossal futuristic robot factory. The submarine features a seamless hull, segmented titanium plates, portholes, and vented conning tower. Surrounding it are giant robotic arms, conveyor belts, assembly lines, and welding torches. Neon blue coolant lines hum, amber maintenance lamps cast dramatic light, and sparks fly as machines work. Include subtle holographic blueprints faintly overlaying the scene, and a moody, cinematic atmosphere with heavy metal textures, grime, and reflections. Perspective from a low angle highlighting the submarine as the centerpiece, with rows of robots receding into the depth.