diff --git a/app/main/api/internal/logic/query/downloadreportpdflogic.go b/app/main/api/internal/logic/query/downloadreportpdflogic.go
index b9a0370..c51c1c6 100644
--- a/app/main/api/internal/logic/query/downloadreportpdflogic.go
+++ b/app/main/api/internal/logic/query/downloadreportpdflogic.go
@@ -54,7 +54,16 @@ func (l *DownloadReportPdfLogic) DownloadReportPdf(req *types.DownloadReportPdfR
 	}
 
 	resp = &types.DownloadReportPdfResp{
-		FileName: fmt.Sprintf("report_%s.pdf", req.OrderNo),
+		FileName: func() string {
+			fileKey := req.OrderNo
+			if fileKey == "" {
+				fileKey = orderId
+			}
+			if fileKey == "" {
+				fileKey = "unknown"
+			}
+			return fmt.Sprintf("report_%s.pdf", fileKey)
+		}(),
 		Content:  pdfBytes,
 	}
 	return resp, nil
diff --git a/app/main/api/internal/logic/report/downloadreportpdflogic.go b/app/main/api/internal/logic/report/downloadreportpdflogic.go
index 69e4676..8db7c41 100644
--- a/app/main/api/internal/logic/report/downloadreportpdflogic.go
+++ b/app/main/api/internal/logic/report/downloadreportpdflogic.go
@@ -31,8 +31,16 @@ func (l *DownloadReportPdfLogic) DownloadReportPdf(req *types.DownloadReportPdfR
 		return nil, fmt.Errorf("生成报告 PDF 失败: %w", err)
 	}
 
+	fileKey := req.OrderNo
+	if fileKey == "" {
+		fileKey = req.OrderId
+	}
+	if fileKey == "" {
+		fileKey = "unknown"
+	}
+
 	resp = &types.DownloadReportPdfResp{
-		FileName: fmt.Sprintf("report_%s.pdf", req.OrderNo),
+		FileName: fmt.Sprintf("report_%s.pdf", fileKey),
 		Content:  pdfBytes,
 	}
 	return resp, nil
diff --git a/app/main/api/internal/service/reportpdfservice.go b/app/main/api/internal/service/reportpdfservice.go
index 6753d25..e9460a4 100644
--- a/app/main/api/internal/service/reportpdfservice.go
+++ b/app/main/api/internal/service/reportpdfservice.go
@@ -40,7 +40,8 @@ func (s *ReportPDFService) GenerateReportPDF(ctx context.Context, orderId, order
 	ctxt, cancel := chromedp.NewContext(ctx)
 	defer cancel()
 
-	ctxt, timeoutCancel := context.WithTimeout(ctxt, 40*time.Second)
+	// 渲染 + 滚动触发加载 + 打印需要更充裕时间，避免长报告截断
+	ctxt, timeoutCancel := context.WithTimeout(ctxt, 90*time.Second)
 	defer timeoutCancel()
 
 	var pdfBuf []byte
@@ -48,6 +49,33 @@ func (s *ReportPDFService) GenerateReportPDF(ctx context.Context, orderId, order
 		chromedp.Navigate(reportURL),
 		// 等待报告主体区域渲染完成（数据加载并成功渲染后才会出现）
 		chromedp.WaitVisible(`.pc-report-body`, chromedp.ByQuery),
+		// 额外等待：确保至少渲染出一个模块块
+		chromedp.WaitVisible(`.pc-product-block`, chromedp.ByQuery),
+		// 某些模块可能按视口/IntersectionObserver 懒加载，打印前滚动到页底触发渲染
+		chromedp.ActionFunc(func(ctx context.Context) error {
+			// 逐步滚动到页面底部，避免一次性跳转导致部分观察器不触发
+			var height int64
+			if err := chromedp.Evaluate(`Math.max(document.body.scrollHeight, document.documentElement.scrollHeight)`, &height).Do(ctx); err != nil {
+				return err
+			}
+			step := int64(900)
+			if height < step {
+				step = height
+			}
+			for y := int64(0); y <= height; y += step {
+				js := fmt.Sprintf(`window.scrollTo(0, %d);`, y)
+				if err := chromedp.Evaluate(js, nil).Do(ctx); err != nil {
+					return err
+				}
+				time.Sleep(120 * time.Millisecond)
+			}
+			// 回到顶部，确保页眉与首屏布局稳定
+			if err := chromedp.Evaluate(`window.scrollTo(0, 0);`, nil).Do(ctx); err != nil {
+				return err
+			}
+			time.Sleep(500 * time.Millisecond)
+			return nil
+		}),
 		chromedp.ActionFunc(func(ctx context.Context) error {
 			buf, _, pdfErr := page.PrintToPDF().
 				WithPrintBackground(true).