**Lead Nurturing Analysis — Global Skills (C → B Upgrade)** - **Day 7 behavior is high-intent, not passive.** Requesting a callback is a self-initiated action that signals buying readiness — far stronger than views or video watches. It also implies the lead has a human decision-maker engaged. 第7天的行为属于高意向信号，而非被动浏览。主动请求回电说明客户已有购买意愿，且可能已涉及决策人，其价值远高于观看视频或浏览页面。 - **Score jump validates the threshold logic.** Days 1–6 cumulative score = 56 (below the 60 upgrade line). The Day 7 callback pushes the predicted score to 84, crossing the threshold and triggering automatic C → B upgrade. 前6天累计56分，尚未达到60分的升级线。第7天的回电行为使预测分升至84，越过阈值，系统自动将客户从C池升级到B池。 - **Behavior → score → pool → action chain is now live.** The system should trigger: (1) route callback request to the success team within SLA, (2) send a tailored B2B proposal, (3) create a sales follow-up task with owner assignment, (4) log the interaction to refine future scoring. 行为→评分→池层→动作的链路已启动。系统应触发：①在SLA内将回电请求派给客户成功团队；②推送定制化B2B方案；③生成带责任人的销售跟进任务；④记录互动以优化后续评分模型。 - **B Pool positioning sets up the 100-unit inquiry.** B-tier leads receive higher-touch nurturing (proposals, dedicated follow-up), which is exactly the sales motion needed to qualify volume, budget, and timeline for a 100-unit distribution deal. 进入B池意味着更高触达强度的培育（方案+专属跟进），这正是验证100套分销询盘的采购量、预算与时间表所需的销售动作。 - **Payoff: pipeline quality and sales efficiency.** Behavior-driven upgrades reduce manual triage, shorten response time, and concentrate rep effort on leads most likely to convert into large-volume deals. 业务价值：基于行为的自动升级减少人工分拣、缩短响应时间，让销售精力集中在最可能成单的大额询盘上，提升管道质量与转化效率。