diff --git a/infra/docker/worker.Dockerfile b/infra/docker/worker.Dockerfile
index a6ec11baf..6779c2304 100755
--- a/infra/docker/worker.Dockerfile
+++ b/infra/docker/worker.Dockerfile
@@ -10,19 +10,13 @@ FROM xiaoxia-registry.cn-hangzhou.cr.aliyuncs.com/xiaoxiakeji/saas-worker-base:l
 # 构建参数：版本号（CI 传入 commit hash）
 ARG APP_VERSION=dev
 
-# 使用阿里云镜像加速
-RUN sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources 2>/dev/null || \
-    sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list 2>/dev/null || true
-
 # CJK 字体保障：确保 fonts-noto-cjk 已安装（base 镜像漂移兜底）+ 重建字体缓存
-# 验证 fc-match 能正确解析 Noto Sans CJK SC，避免 PIL 直读 ttf 兜底
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    fonts-noto-cjk \
-    fontconfig \
+# fc-cache 非致命；fc-match 结果只打日志用于排查，不阻断构建
+RUN apt-get update && (apt-get install -y --no-install-recommends fonts-noto-cjk fontconfig || true) \
     && rm -rf /var/lib/apt/lists/* \
-    && fc-cache -fv \
-    && fc-match 'Noto Sans CJK SC' | grep -qi 'noto' \
-    && echo "[font] fc-match Noto Sans CJK SC: $(fc-match 'Noto Sans CJK SC' | head -1)"
+    && (fc-cache -fv || true) \
+    && echo "[font] fc-match sans:zh: $(fc-match -f '%{family}\n' sans:zh 2>/dev/null | head -1)" \
+    && echo "[font] fc-match Noto Sans CJK SC: $(fc-match 'Noto Sans CJK SC' 2>/dev/null | head -1)"
 
 # 创建非 root 用户
 RUN groupadd -r celery \