diff --git a/backend/internal/repository/http_upstream.go b/backend/internal/repository/http_upstream.go
index 509e1492..9daf80be 100644
--- a/backend/internal/repository/http_upstream.go
+++ b/backend/internal/repository/http_upstream.go
@@ -175,8 +175,9 @@ func (s *httpUpstreamService) DoWithTLS(req *http.Request, proxyURL string, acco
 		return s.Do(req, proxyURL, accountID, accountConcurrency)
 	}
 
-	// 优先使用 Node.js TLS 代理模式
-	if s.isNodeTLSProxyEnabled() && req != nil && req.URL != nil && req.URL.Scheme == "https" {
+	// 优先使用 Node.js TLS 代理模式（仅 Anthropic API）
+	// 其他上游（Sora/Bedrock 等）需要 Chrome 指纹，走原有 uTLS 路径
+	if s.isNodeTLSProxyEnabled() && req != nil && req.URL != nil && req.URL.Hostname() == "api.anthropic.com" {
 		return s.doViaNodeTLSProxy(req, accountID, accountConcurrency)
 	}