Theme: Cinematic science-fiction future-city poster for giant floating metropolis above a neon night sky, with high-altitude train crossing between purple-blue towers, headline 未来，正在重新定义人类。, and title CITY 2099.
Subject: giant floating metropolis above a neon night sky becomes the massive central worldbuilding subject, with high-altitude train crossing between purple-blue towers moving through neon architecture, holographic advertising, and a vast night-sky metropolis.
Scene: Huge futuristic city floating or rising in the night sky, high-tech cold atmosphere, neon towers, silver-gray megastructures, holographic projections, layered skyline depth, and grand human-future scale.
Composition: Fixed cinematic poster
Composition: large central future city dominates the frame, transport line cuts across the skyline, lower area reserved for title and date-style text, strong vertical depth, and movie-promotion hierarchy.
Signature elements: giant floating metropolis above a neon night sky, high-altitude train crossing between purple-blue towers, floating night metropolis, neon buildings, holographic ads, silver-gray megastructures, lower title zone, 未来，正在重新定义人类。, and CITY 2099.
Style: Science-fiction city poster, futuristic cinematic worldbuilding, cyberpunk concept art, premium film-concept key art, ultra-high-resolution city detail, and advanced movie-title design.
Color palette: Neon blue, electric purple, silver gray, high-tech cool tones, deep night black, cyan highlights, and controlled magenta glow.
Lighting: Large-scale city glow, cool neon building edges, holographic light haze, train streaks, volumetric night atmosphere, and high-contrast futuristic illumination.
Camera: Wide cinematic worldbuilding camera looking toward the city, with immense scale, layered aerial depth, readable transport route, and poster-ready vertical framing.
Typography: 未来，正在重新定义人类。 appears as the readable Chinese sci-fi slogan;
Restrictions: Clean focused visual treatment with coherent detail and source-consistent structure.
