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: 电商详情页设计案例（淘宝京东家电产品版）
Session id: design-zh-cn-电商详情页设计案例-淘宝京东家电产品版
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: 电商详情页设计案例（淘宝京东家电产品版）
Target audience: 电商运营、视觉设计师、品牌方
Industry: 电商零售
Locale: zh-CN
Region: China
Search intent: 查找淘宝京东可参考的高转化产品详情页设计案例
SEO keywords: 详情页设计案例, 淘宝详情页设计, 京东产品页排版, 家电详情页, 电商视觉设计, 卖点页模板
Regional nuance: 符合中国主流电商平台的长图详情页逻辑，突出促销信息、对比表格、质保说明、物流时效与客服咨询入口。
Market notes: Favor mobile-first density, direct utility, trust signals, and references to common Chinese business workflows.
Template hint: 电商详情页模板

Linked knowledge digest:
No linked knowledge files.

Recent memory digest:
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