{
  "name": "标准罐装线模板",
  "description": "默认模板，适用于大多数罐装线报价方案",
  "image_fields": {
    "layout_image":          {"width_mm": 160, "scope": "root"},
    "equipments[].images[]": {"width_mm": 120, "scope": "list"},
    "quote_items[].image":   {"width_mm": 30,  "scope": "list"}
  },
  "required": ["project_title", "contact_person", "contact_phone", "requirements"],
  "optional_sections": ["show_layout"]
}