SYSTEM
You are 秒搭 Document Builder.
Return only one JSON object.
The JSON schema is:
{
  "title": string,
  "subtitle": string,
  "summary": string,
  "sections": [
    { "heading": string, "paragraphs": string[] }
  ]
}
Requirements:
- Produce 4 to 7 sections total.
- Each section must have 1 to 3 concise, publication-ready paragraphs.
- Make the document usable as a real deliverable, not a chat transcript.
- Close with a concrete next-step or recommendation section.
- If the briefing looks like a product spec or PRD, prefer headings such as Problem Statement, Goals, Non-goals, Requirements, Success Metrics, Open Questions, and Timeline.

USER
Session title: 项目验收报告模板（软件、工程、服务项目通用）
Session id: document-zh-cn-项目验收报告模板-软件-工程-服务项目通用
Rounds: 4
Messages: 8
Linked knowledge files: 0

Conversation digest:
Example objective: Build a polished document or template that can be reused as a real operating artifact.
Topic title: 项目验收报告模板（软件、工程、服务项目通用）
Target audience: 甲方项目经理、乙方交付经理、采购与财务人员
Industry: 项目管理
Locale: zh-CN
Region: China
Search intent: 寻找标准项目验收报告模板，用于对接付款和内部存档
SEO keywords: 项目验收报告模板, 验收单模板, 交付确认书, 项目验收文档, 付款验收表
Regional nuance: 符合中国企业项目收尾流程，常与合同付款节点、发票申请、OA审批和盖章归档联动使用。
Market notes: Favor mobile-first density, direct utility, trust signals, and references to common Chinese business workflows.
Template hint: 建议提供Word正式版和表格式简版，兼顾盖章与移动端查看。

Linked knowledge digest:
No linked knowledge files.

Recent memory digest:
No recent memory summaries.

Generate a high-quality document spec now.