diff --git a/backend/internal/repository/http_upstream.go b/backend/internal/repository/http_upstream.go
index b82ee65b..5b882f92 100644
--- a/backend/internal/repository/http_upstream.go
+++ b/backend/internal/repository/http_upstream.go
@@ -124,6 +124,11 @@ func NewHTTPUpstream(cfg *config.Config) service.HTTPUpstream {
 //   - 调用方必须关闭 resp.Body，否则会导致 inFlight 计数泄漏
 //   - inFlight > 0 的客户端不会被淘汰，确保活跃请求不被中断
 func (s *httpUpstreamService) Do(req *http.Request, proxyURL string, accountID int64, accountConcurrency int) (*http.Response, error) {
+	// 优先使用 Node.js TLS 代理模式（全局生效，不依赖账号级 TLS 指纹开关）
+	if s.isNodeTLSProxyEnabled() && req != nil && req.URL != nil && req.URL.Scheme == "https" {
+		return s.doViaNodeTLSProxy(req, accountID, accountConcurrency)
+	}
+
 	if err := s.validateRequestHost(req); err != nil {
 		return nil, err
 	}