Post-apocalyptic five-story commercial building cross-section AI Image Prompt

8K post-apocalyptic wasteland style illustration, dark gray + rusty red color scheme, weathered and mottled texture, cross-section showing a five-story reinforced concrete commercial building in the ruins, atmosphere of desolation yet vitality. First floor is a supply trading post with protective barriers, shelves stocked with canned goods, water, medicine, walls covered with missing person posters, a survivor dragging a camping trailer full of old parts and ammunition to trade, guard standing at the door with weapon; second floor is a repair workshop, mechanic fixing broken engine and generator, parts and tools scattered, welding sparks lighting up the dim room; third floor is a canteen, 3-4 fast food tables with simple coarse grain bread and wild vegetable soup, a chef cooking in the food prep area, people sitting around discussing escape routes, eyes full of hope; fourth floor is a medical station, beds with injured survivors, doctors changing dressings, medical boxes piled in corner, smell of disinfectant; roof is a defensive watchtower with rusty barbed wire, searchlight, antenna, spare oil drums and signal flares stacked in corner, a damaged iron warning sign tilted, wind whistling through the wire. The building exudes tension of the apocalypse yet hides a glimmer of life due to the survivors' perseverance.