diff --git a/backend/internal/ai/tts/mimo.go b/backend/internal/ai/tts/mimo.go
index 717b9f7..04777b5 100644
--- a/backend/internal/ai/tts/mimo.go
+++ b/backend/internal/ai/tts/mimo.go
@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/hhs/camtalk/internal/util"
 	"go.uber.org/zap"
 )
 
@@ -108,7 +109,10 @@ func (m *MiMoService) SynthesizeStream(ctx context.Context, textStream <-chan st
 
 			audio, err := m.synthesize(ctx, text, voice)
 			if err != nil {
-				m.logger.Warnw("mimo tts: synthesize failed", "error", err, "text", text)
+				m.logger.Warnw("mimo tts: synthesize failed",
+					"error", err,
+					"text_len", len(text),
+					"text_preview", util.Truncate(text, 100))
 				// 静默跳过，不中断整个流
 				continue
 			}