/**
     * 全局事件模块。
     * 页面大部分内容由模板字符串动态生成，因此统一使用事件代理监听 click，再按 data-* 属性更新 state 或打开外链。
     */
    document.addEventListener("click", (event) => {
      // 维度切换会影响企业、项目、指标所有派生数据；项目页切换维度后回到企业页，防止旧项目 id 失效。
      const dimButton = event.target.closest("[data-dim]");
      if (dimButton) {
        state.dimension = dimButton.dataset.dim;
        if (state.view === "project") {
          state.view = "enterprise";
          state.projectId = "";
        }
        if (state.drillOpen && state.drillView === "project") {
          state.drillView = "trend";
        }
        render();
        return;
      }

      // 系统切换后需要校验当前选中指标是否仍属于新系统，不属于则切换到该系统第一个指标。
      const systemButton = event.target.closest("[data-system]");
      if (systemButton) {
        if (!allowedSystems.includes(systemButton.dataset.system)) return;
        state.system = systemButton.dataset.system;
        if (!getWarningIndicators().some((item) => item.name === state.selectedIndicator)) {
          state.selectedIndicator = getWarningIndicators()[0]?.name || "";
        }
        render();
        return;
      }

      // 显式操作按钮：外链预览、弹窗开关、面包屑返回都通过 data-action 分发。
      const action = event.target.closest("[data-action]");
      if (action) {
        if (action.dataset.action === "more-indicators") {
          window.open(INDICATOR_MORE_URL, "_blank", "noopener,noreferrer");
          return;
        }
        if (action.dataset.action === "enterprise-more-indicators") {
          window.open(ENTERPRISE_INDICATOR_MORE_URL, "_blank", "noopener,noreferrer");
          return;
        }
        if (action.dataset.action === "group-usage-report-preview") {
          window.open(GROUP_USAGE_REPORT_URL, "_blank", "noopener,noreferrer");
          return;
        }
        if (action.dataset.action === "preview-unit-report") {
          const unit = action.dataset.unit || "";
          const fileName = usageReportFiles[unit];
          if (!fileName) {
            window.alert(`${unit || "该单位"}未上传一览表`);
            return;
          }
          const fileUrl = `${REPORT_FILE_BASE_URL}${encodeURIComponent(fileName)}`;
          window.open(`${OFFICE_PREVIEW_BASE_URL}${encodeURIComponent(fileUrl)}`, "_blank", "noopener,noreferrer");
          return;
        }
        if (action.dataset.action === "group-online-stats") {
          state.drillOpen = true;
          state.drillView = "groupOnlineStats";
          state.drillEnterpriseName = "";
          state.drillListType = "";
          state.projectId = "";
          renderDrillModal();
          return;
        }
        if (action.dataset.action === "close-drill") {
          state.drillOpen = false;
          state.drillView = "trend";
          state.drillEnterpriseName = "";
          state.drillListType = "";
          renderDrillModal();
          return;
        }
        if (action.dataset.action === "enterprise-project-list") {
          state.drillOpen = true;
          state.drillView = "enterpriseProjectList";
          state.drillListType = "all";
          state.projectId = "";
          renderDrillModal();
          return;
        }
        if (action.dataset.action === "enterprise-offline-list") {
          state.drillOpen = true;
          state.drillView = "enterpriseProjectList";
          state.drillListType = "offline";
          state.projectId = "";
          renderDrillModal();
          return;
        }
        if (action.dataset.action === "indicator-trend") {
          state.drillOpen = true;
          state.drillView = "trend";
          state.drillEnterpriseName = "";
          state.projectId = "";
          state.drillListType = "";
          renderDrillModal();
          return;
        }
        if (action.dataset.action === "group") {
          state.view = "group";
          state.enterpriseName = "";
          state.projectId = "";
        }
        if (action.dataset.action === "enterprise") {
          state.view = "enterprise";
          state.enterpriseName = action.dataset.enterprise || state.enterpriseName;
          state.projectId = "";
        }
        render();
        return;
      }

      // 指标卡点击：集团页打开指标趋势，企业页打开该企业下的项目指标穿透。
      const indicatorTarget = event.target.closest("[data-indicator]");
      if (indicatorTarget) {
        state.selectedIndicator = indicatorTarget.dataset.indicator;
        state.drillOpen = true;
        if (state.view === "enterprise") {
          state.drillView = "project";
          state.drillEnterpriseName = state.enterpriseName;
        } else {
          state.drillView = "trend";
          state.drillEnterpriseName = "";
        }
        state.projectId = "";
        renderDrillModal();
        return;
      }

      // 指标排行中的企业点击：保留当前指标，切换穿透企业，弹窗内容更新为项目维度明细。
      const indicatorEnterpriseTarget = event.target.closest("[data-indicator-enterprise]");
      if (indicatorEnterpriseTarget) {
        state.drillEnterpriseName = indicatorEnterpriseTarget.dataset.indicatorEnterprise;
        state.drillOpen = true;
        state.drillView = "project";
        state.projectId = "";
        renderDrillModal();
        return;
      }

      // 企业点击：从集团图表、表格或面包屑进入企业看板。
      const enterpriseTarget = event.target.closest("[data-enterprise]");
      if (enterpriseTarget) {
        state.view = "enterprise";
        state.enterpriseName = enterpriseTarget.dataset.enterprise;
        state.projectId = "";
        render();
        return;
      }

      // 项目点击：进入项目级看板，并关闭当前弹窗，避免弹窗遮挡项目详情。
      const projectTarget = event.target.closest("[data-project]");
      if (projectTarget) {
        state.view = "project";
        state.projectId = projectTarget.dataset.project;
        state.drillOpen = false;
        state.drillView = "trend";
        state.drillListType = "";
        render();
      }
    });

    /**
     * 初始化顺序：
     * 先绑定缩放并渲染兜底数据，再异步加载集团主数据接口；
     * 接口返回后 loadProjectMasterDataAnalysis 会再次 render，刷新集团上线率卡片和统计弹窗。
     */
    window.addEventListener("resize", scaleScreen);
    if (window.visualViewport) {
      window.visualViewport.addEventListener("resize", scaleScreen);
    }

    scaleScreen();
    render();
    loadProjectMasterDataAnalysis();