diff --git a/par-core/src/main/java/com/par/core/storage/QiniuStorageService.java b/par-core/src/main/java/com/par/core/storage/QiniuStorageService.java
index 10aafa5..6cd8195 100644
--- a/par-core/src/main/java/com/par/core/storage/QiniuStorageService.java
+++ b/par-core/src/main/java/com/par/core/storage/QiniuStorageService.java
@@ -87,9 +87,10 @@ public class QiniuStorageService implements StorageService {
             log.warn("Qiniu stat 失败 {}: {}", path, e.response != null ? e.response.error : e.getMessage());
         }
 
-        // HTTP 签名 URL 拉取（七牛默认CDN域名不支持HTTPS）
+        // HTTP 签名 URL（deadline=当前时间+1小时的Unix秒数）
         String baseUrl = "http://" + downloadDomain + "/" + path;
-        String signedUrl = auth.privateDownloadUrl(baseUrl, 3600);
+        long deadline = System.currentTimeMillis() / 1000 + 3600;
+        String signedUrl = auth.privateDownloadUrl(baseUrl, deadline);
         try {
             var req = HttpRequest.newBuilder().uri(URI.create(signedUrl))
                     .timeout(Duration.ofSeconds(10)).GET().build();