Architectural illustration minimalist retro urban elegant

{"type":"Vertical infrastructure travel poster / technical line illustration","style":"Beige paper background, monochrome blue ink, precise architectural drawing, fine hatching, blueprint-like contour lines, minimalist retro poster design, clean margins and thin border","format":{"aspect_ratio":"2:3 vertical poster","color_palette":"Limited to off-white paper and deep matte blue"},"headline":{"text":"","position":"Top","style":"Extra-large, wide letter-spaced sans-serif uppercase letters"},"subheadings":{"count":3,"items":[{"text":"Connecting · Flowing · Future CONNECTING · FLOWING · FUTURE","position":"Below the title, aligned left"},{"text":"China CHINA","position":"Upper left"},{"text":"The Beauty of Transportation / THE BEAUTY OF TRANSPORTATION","position":"Upper right, next to a miniature bridge icon"}]},"main_scene":{"location":"","subject":"A grand elevated cross-sea expressway interchange spanning the water","composition":"High viewpoint overlooking multiple curved bridge ramps in the foreground, with the long bridge extending across the sea to distant islands and mountains, and a vast sky with a few small birds","details":"Many slender bridge piers reflected on the calm water, guardrails, streetlights, lane markings, small boats, distant ships, islands, coastal mountains, trees and shrubs below in the foreground","vehicles":"Cars, sedans, vans, and one bus driving on the elevated road"},"road_signage":{"count":5,"items":[{"description":"Large suspended blue sign divided into 3 panels","position":"Lower center","labels":["Seaside Road / Haibin Rd. / 2 km","Cross-Sea Bridge / Cross-Sea Bridge / 500 m","Airport / Airport / 1 km"]},{"description":"Electronic message board","position":"Right of the suspended sign","label":"Travel safely / Return home safely"},{"description":"Circular speed limit sign","position":"Lower right","label":"80"},{"description":"Circular lane or turn indicator sign","position":"Below the speed limit sign","label":"Curved arrow symbol"},{"description":"Small rectangular area road warning sign","position":"Bottom of the sign stack","label":"Section speed camera / 1 km ahead"}]},"human_element":{"count":1,"description":"A cyclist in the lower-left foreground riding on a separate pedestrian or bicycle path"},"footer_text":{"text":"Transportation connects cities / Reaching a better life / CONNECTING CITIES / ENRICHING LIFE","position":"Lower left"},"rendering_instructions":"Do not use photorealistic colors; keep everything in a refined blue pen drawing style on warm paper. Emphasize the scale of the infrastructure, the elegant bridge curves, precise perspective, and poster typography. Strictly preserve the specified Chinese and English text where possible."}