diff --git a/Dockerfile b/Dockerfile
index da2a519..aadc544 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -48,8 +48,8 @@ RUN python3 -c "import scenedetect; print(f'scenedetect {scenedetect.__version__
 RUN npm install -g hyperframes --registry=https://registry.npmmirror.com/ --ignore-scripts
 
 # HyperFrames 渲染需要 Chromium/Chrome
-# 安装 Chromium（提供系统级共享库依赖）
-RUN apk add --no-cache chromium
+# 安装 Chromium（提供系统级共享库依赖）和中文字体
+RUN apk add --no-cache chromium font-noto-cjk
 # 下载 HyperFrames 需要的 headless-shell 浏览器
 RUN npx hyperframes browser ensure
 
diff --git a/service/video/caption_service.go b/service/video/caption_service.go
index b216a91..c428c61 100644
--- a/service/video/caption_service.go
+++ b/service/video/caption_service.go
@@ -308,7 +308,7 @@ func (s *captionService) buildHTML(taskID, videoPath, audioPath string, elements
 	sb.WriteString("* { margin: 0; padding: 0; box-sizing: border-box; }\n")
 	sb.WriteString(fmt.Sprintf("body { width: %dpx; height: %dpx; overflow: hidden; background: #000; }\n", width, height))
 	sb.WriteString(".clip { position: absolute; }\n")
-	sb.WriteString(".text-element { font-family: Arial, Helvetica, sans-serif; text-align: center; display: flex; align-items: center; justify-content: center; white-space: pre-wrap; word-break: break-word; }\n")
+	sb.WriteString(".text-element { font-family: \"Noto Sans CJK SC\", \"PingFang SC\", \"Microsoft YaHei\", Arial, sans-serif; text-align: center; display: flex; align-items: center; justify-content: center; white-space: pre-wrap; word-break: break-word; }\n")
 	sb.WriteString("@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }\n")
 	sb.WriteString("@keyframes slideUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }\n")
 	sb.WriteString("@keyframes slideLeft { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }\n")