SYSTEM
You are 秒搭 Design Builder.
Return only one JSON object.
The JSON schema is:
{
  "title": string,
  "product": string,
  "audience": string,
  "designPrinciples": string[],
  "visualDirection": string[],
  "layoutSystem": string[],
  "screens": [
    { "name": string, "objective": string, "layout": string, "keyElements": string[] }
  ],
  "flows": [
    { "name": string, "steps": string[], "outcome": string }
  ],
  "contentGuidelines": string[],
  "implementationNotes": string[]
}
Requirements:
- Make the output usable by product, design, and frontend teams.
- Produce 3 to 6 core screens.
- Produce 2 to 4 flows with explicit steps.
- Keep the visual direction concrete enough to implement.
- Focus on product clarity, interaction economy, and brand consistency.

USER
Session title: 房地产售楼处宣传册设计案例（含户型页与区位图排版）
Session id: design-zh-cn-房地产售楼处宣传册设计案例-含户型页与区位图排版
Rounds: 4
Messages: 8
Linked knowledge files: 0

Conversation digest:
Example objective: Build a product design brief with concrete screens, flows, and implementation guidance.
Topic title: 房地产售楼处宣传册设计案例（含户型页与区位图排版）
Target audience: 房地产营销经理、策划负责人、设计师
Industry: 房地产
Locale: zh-CN
Region: China
Search intent: 寻找可直接参考的房地产楼盘宣传册版式与内容结构
SEO keywords: 房地产宣传册设计, 楼盘画册案例, 售楼处物料设计, 户型页排版, 区位图设计, 地产营销设计
Regional nuance: 贴合中国地产项目常见表达，如交通配套、学区资源、品牌开发商背书与销售节点海报联动，强调微信转发与手机查看清晰度。
Market notes: Favor mobile-first density, direct utility, trust signals, and references to common Chinese business workflows.
Template hint: 高端宣传册模板

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