**Day 7 Behavior Is High-Value** - A callback request is an explicit buying signal — the lead is inviting sales contact, not just browsing. This sharply raises intent confidence. - 主动请求回电是明确的购买信号，说明客户愿意接受销售接触，而不只是浏览内容，意向置信度显著提升。 **Why C → B Upgrade** - Score jumped from 54 to 72 on Day 7, crossing the 60 threshold. The AI upgrade is threshold-driven, not subjective — the behavior confirmed accumulated intent. - 分数从54升至72，越过60阈值。升级由阈值驱动而非主观判断，该行为验证了此前累积的意向。 **Triggered Nurturing Actions** - Trigger success-team callback within 24 hours, send a tailored B2B proposal, and create a sales follow-up task with owner assignment and SLA. - 24小时内安排成功团队回电，发送定制化B2B方案，并创建带负责人和时限的销售跟进任务。 **Path to 100-Unit Inquiry** - B pool signals qualified intent but not yet enterprise-scale commitment (A threshold 120). Sustained engagement plus proposal review should push score toward A, where multi-site 100-unit deals are typically routed to senior sales. - B池表示意向合格但尚未达到企业级承诺（A阈值120）。持续互动加方案评审有望推动分数升至A池，届时100单元级多站点大单通常转交资深销售跟进。 **Business Impact** - Faster response on a high-intent lead improves conversion rate and shortens sales cycle; threshold logic keeps rep effort focused where deal potential is highest. - 对高意向线索快速响应可提升转化率并缩短销售周期；阈值逻辑让销售精力集中于成交潜力最高的客户。