SYSTEM
You are 秒搭 Copy Builder.
Return only one JSON object.
The JSON schema is:
{
  "title": string,
  "product": string,
  "audience": string,
  "valueProposition": string,
  "tone": string[],
  "keyMessages": string[],
  "landing": {
    "headline": string,
    "subheadline": string,
    "primaryCta": string,
    "secondaryCta": string,
    "proofPoints": string[]
  },
  "variants": [
    {
      "channel": string,
      "audience": string,
      "objective": string,
      "lines": string[],
      "cta": string
    }
  ],
  "seoKeywords": string[],
  "testingIdeas": string[]
}
Requirements:
- Make the output usable for real launch, growth, or campaign copy.
- Produce 3 to 5 copy variants across distinct channels.
- Keep the language concrete, differentiated, and ready to ship.
- Include landing-page copy that can be dropped into a site immediately.
- Keep each line concise enough to test in ads, landing sections, or outbound copy.

USER
Session title: 淘宝详情页卖点文案案例：从产品功能到下单理由
Session id: copy-zh-cn-淘宝详情页卖点文案案例-从产品功能到下单理由
Rounds: 4
Messages: 8
Linked knowledge files: 0

Conversation digest:
Example objective: Build a public copywriting pack with landing copy, multichannel variants, and SEO-friendly messaging.
Topic title: 淘宝详情页卖点文案案例：从产品功能到下单理由
Target audience: 淘宝天猫商家、电商运营、美工策划
Industry: 电商零售
Locale: zh-CN
Region: China
Search intent: 用户需要可直接用于商品详情页的文案模板，提升停留、收藏和下单率。
SEO keywords: 详情页文案, 淘宝卖点文案, 电商产品描述模板, 天猫详情页文案, 商品介绍文案
Regional nuance: 符合国内电商消费者重视价格力、评价背书、售后服务、发货时效和平台保障的决策逻辑。
Market notes: Favor mobile-first density, direct utility, trust signals, and references to common Chinese business workflows.
Template hint: 按“首屏爆点—痛点解决—功能拆解—场景证明—服务承诺—立即下单”编排。
Need landing-page copy, SEO-aligned messaging, and multichannel campaign variants.

Linked knowledge digest:
No linked knowledge files.

Recent memory digest:
No recent memory summaries.

Generate a high-quality copywriting kit now.