Blue Line-Art Infrastructure Poster

{
  "type": "Vertical infrastructure travel poster / technical line illustration",
  "style": "Beige paper background, monochrome blue ink, precise architectural drawings, delicate shading lines, blueprint-like outlines, minimalist retro poster design, clean margins and thin borders.",
  "format": {
    "aspect_ratio": "2:3 Vertical Poster",
    "color_palette": "Only available on off-white and dark matte blue paper."
  },
  "headline": {
    "text": "{argument name=\"headline text\" default=\"Infrastructure\"}",
    "position": "top",
    "style": "Extra-large font size, wide spacing between sans-serif capital letters"
  },
  "subheadings": {
    "count": 3,
    "items": [
      {
        "text": "Connecting, Flowing, and the Future",
        "position": "Below the title, left-aligned"
      },
      {
        "text": "China",
        "position": "upper left"
      },
      {
        "text": "The Beauty of Transportation",
        "position": "In the upper right corner, next to the miniature bridge icon"
      }
    ]
  },
  "main_scene": {
    "location": "{argument name=\"location\" default=\"China's coastal bays\"}",
    "subject": "A magnificent elevated highway interchange spanning the water.",
    "composition": "From a high vantage point, the foreground features multiple winding bridge ramps, with long bridges extending across the sea to distant islands and mountains, and several small birds soaring in the vast sky.",
    "details": "The calm water reflects numerous slender bridge piers, railings, streetlights, lane markings, small boats, distant ships, islands, and coastal mountains, with trees and shrubs in the foreground below.",
    "vehicles": "Cars, sedans, vans and a bus driving on the elevated road"
  },
  "road_signage": {
    "count": 5,
    "items": [
      {
        "description": "Large hanging blue signboard, divided into 3 panels",
        "position": "bottom center",
        "labels": [
          "Haibin Road / 2 km",
          "Cross-Sea Bridge / 500 m",
          "Airport / 1 km"
        ]
      },
      {
        "description": "Electronic information board",
        "position": "right side of the hanging sign",
        "label": "Safe travels / Safe return home"
      },
      {
        "description": "Circular speed limit sign",
        "position": "bottom right",
        "label": "80"
      },
      {
        "description": "Circular lane or turn indicator signs",
        "position": "Below the speed limit sign",
        "label": "Curved arrow symbol"
      },
      {
        "description": "Small rectangular area road warning sign",
        "position": "bottom of the marker pile",
        "label": "Section speed measurement / 1km ahead"
      }
    ]
  },
  "human_element": {
    "count": 1,
    "description": "A cyclist is seen riding on a separate pedestrian or bike path in the lower left of the foreground."
  },
  "footer_text": {
    "text": "Transportation connects cities / Enriching life",
    "position": "Lower left"
  },
  "rendering_instructions": "Avoid using photorealistic colors; maintain a refined blue pen-and-ink drawing style on warm-colored paper for all content. Emphasize the scale of infrastructure, elegant bridge curves, precise perspective, and poster layout. Where possible, strictly preserve designated Chinese and English text."
}