Create cinematic science fiction concept art of a floating ocean data center city built on modular platforms. Include vertical cooling towers, solar membranes, autonomous maintenance boats, misty horizon, ocean spray, and blue-white server glow visible through transparent facades. Use a landscape 4:3 frame, wide 24mm perspective, dramatic overcast sky with sunlight breaking through, believable engineering detail, small maintenance-suit figures for scale, no logos, no readable text, no watermark.