Design a high-end "Relief City Atlas Poster," themed around the [Season Theme] of [City …

Design a high-end "Relief City Atlas Poster," themed around the [Season Theme] of [City Name]. The overall composition is not a standard flat illustration, but a physical installation-level visual work combining miniature city models, 3D relief maps, architectural sand tables, and contemporary poster design. The background is a minimalist [Background Color] base plate with extensive negative space, presenting the aesthetics of a high-end exhibition poster and a collectible city installation. Place a tiny figure (or boat/traveler) seen from behind in the bottom right corner or slightly to the right of the bottom, serving as the starting point for the visual narrative. A natural, flowing main line (river/road/city trajectory) extends from this subject, gradually evolving into the city's topography and river system, organically connecting the city's representative elements. Along this main line, organize the following in sequence: landmark buildings, old town blocks, bridges, waterfront parks, life scenes, and modern building clusters. All visual elements must appear as "physically raised relief models" protruding from the base plate, featuring distinct multi-layered thickness variations (ranging from 3-12mm), sharp and clean-cut edges, soft natural shadows, and exquisite highlights. The material should have the texture of matte hard resin/acrylic architectural models—rigid, restrained, refined, and tidy, as if it were a physical art installation precision-carved by CNC and hand-assembled. The perspective is a slight 45°-60° top-down view, resembling a meticulously carved and assembled city map installation. The color palette must strictly revolve around the [Season/Theme], with [Main Color] as the primary tone and [Accent Color] as the secondary, maintaining a low-saturation, high-end, unified, minimalist, and restrained aesthetic. Incorporate seasonal elements such as spring flowers/summer greens/autumn leaves/winter snow/night lights/reflections after rain to convey the atmosphere of time, without ever being gaudy. In the top left corner, add the main title "[Main Title Text]" in an elegant font consistent with the style, accompanied by a concise subtitle and a short, poetic descriptive text block below. All text must be highly unified with the relief style, possessing a sense of commemoration and collectible quality. Overall temperament: elegant, contemporary, restrained, refined, commemorative, collectible city art, suitable for a series. It must maintain high consistency with other works in the "Relief City Atlas" series (Guangzhou Summer, Shanghai Autumn, Harbin Winter, Beijing Spring) in terms of material rendering, relief thickness, light and shadow logic, compositional rhythm, and typography. Keywords: 3D raised relief city atlas, miniature architectural diorama, sculpted topographic map poster, premium editorial poster, layered physical model, CNC relief sculpture, matte resin architectural model, studio product photography of art installation, masterpiece, best quality, ultra detailed, editorial lighting