A colossal ice-world megacity carved within a massive glacier spanning kilometers, towering crystalline skyscrapers with integrated fusion-heating membranes glowing soft arctic blue, suspended glacier-tier platforms with floating frost-garden terraces between massive iceberg formations, sleek hover-trains gliding through soft aurora light between luminous ice platforms, tiny cryologists dwarfed by mountain-sized cathedral-glacier spires navigating between illuminated research levels, deep midnight navy and electric cyan palette with soft northern lights filtering through infinite ice layers, epic upward composition from frozen tundra traveling upward through massive crystal elevators emphasizes impossible cryogenic engineering scale, photorealistic, cinematic depth of field