- **Day 7 callback request = buying signal, not browsing.** A prospect asking to speak with the success team is actively seeking human validation — high intent, low ambiguity, and short sales cycle. 中文：Day 7 主动申请回电是明确购买信号——客户要真人验证，意向强、不模糊、成交周期短。 - **C → B upgrade is threshold-driven and data-consistent.** Score rose 20 → 56 (Days 1–6) → 84 predicted (Day 7), crossing the 60 threshold; AI reclassifies to B and shifts from marketing nurture to sales-assisted nurture. 中文：C 升 B 由阈值触发、数据自洽：20→56→预测 84，越过 60 门槛，AI 自动从营销培育转入销售协同培育。 - **Trigger precise B-pool actions, not generic emails.** Route to success team for callback within 24h, send a tailored 100-unit proposal, create a sales follow-up task, and schedule a discovery call. 中文：B 池应触发精准动作而非群发：24 小时内回电、定制 100 单元方案、生成销售跟进任务、安排需求沟通会。 - **Protect the 100-unit opportunity.** The callback request signals enterprise-scale intent; a fast, structured response maximizes deal size and shortens the path to a distribution inquiry. 中文：守住 100 单元大单机会：回电请求意味着企业级采购意向，快速结构化响应可放大单值并缩短分销询盘转化路径。 - **Keep pacing toward A pool (120).** Continued engagement + proposal feedback will compound the score; below-threshold prospects should stay in B nurture to preserve sales efficiency. 中文：持续向 A 池（120）推进：方案反馈与互动会叠加分数；未达阈值者留在 B 池培育，保障销售效率。