Create a vast cinematic science-fiction cityscape titled by concept as {argument name="concept" default="artificial sun and city"}: a colossal domed megacity seen from a high balcony, with an enormous blazing artificial sun embedded in the ceiling at the top center. The sun is a white-gold fusion-like orb surrounded by concentric mechanical rings, radial cables, transparent dome panels, and delicate golden circuitry, casting warm shafts of light downward through haze. Below it stretches a utopian futuristic metropolis built around turquoise lakes, terraced greenery, bridges, and distant snow-capped mountains or cloudlike rocky ridges enclosed inside the dome. The foreground includes two small human silhouettes standing on a curved observation balcony at the lower left, emphasizing immense scale. On the right and left edges, towering cylindrical glass-and-metal skyscrapers with rounded balconies and glowing interior floors frame the view; in the lower half, include layered elevated transit rails, sleek transparent tube trains, spires, circular platforms, and dense metallic infrastructure. Use {argument name="color palette" default="warm gold sunlight, cool cyan water, silver metal, soft mist"}, ultra-detailed concept art, painterly realism, intricate architecture, luminous atmosphere, volumetric light, reflective glass, shimmering highlights, epic vertical composition, high depth, awe and wonder, no text, no logo, no watermark.