垂直城市：单一体量中的混合功能

Design a mixed-use tower that functions as a vertical city by stacking offices, hotels, residences, observation decks, and public amenities within one coherent architectural form. Prioritize human experience, environmental performance, and urban connection. A tapering tower whose changing programme is legible through varying floor heights and window proportions, public levels expressed as taller transparent bands, the base opening directly onto a station concourse, clear daylight, low viewpoint, 24mm lens, ultra photorealistic, 8K