diff --git a/app.py b/app.py
index 8138ca0..d64e769 100644
--- a/app.py
+++ b/app.py
@@ -240,6 +240,16 @@ except Exception:
     _SESSION_DAYS = 7
 app.config["PERMANENT_SESSION_LIFETIME"] = timedelta(days=_SESSION_DAYS)
 app.config["SESSION_REFRESH_EACH_REQUEST"] = True
+# 中控跨站 iframe 嵌入:默认 SameSite=None;Secure,否则仅首屏有会话、后续 API 全 401
+_samesite = (os.getenv("SESSION_COOKIE_SAMESITE") or "None").strip() or "None"
+app.config["SESSION_COOKIE_SAMESITE"] = _samesite
+_secure_raw = (os.getenv("SESSION_COOKIE_SECURE") or "").strip().lower()
+if _secure_raw in ("1", "true", "yes", "on"):
+    app.config["SESSION_COOKIE_SECURE"] = True
+elif _secure_raw in ("0", "false", "no", "off"):
+    app.config["SESSION_COOKIE_SECURE"] = False
+elif _samesite.lower() == "none":
+    app.config["SESSION_COOKIE_SECURE"] = True
 from lib.instance.instance_embed_lib import attach_embed_templates, redirect_to_embed_shell_if_enabled
 from lib.instance.instance_static_lib import install_common_static
 
@@ -5157,6 +5167,17 @@ def login_required(f):
     def decorated(*args, **kwargs):
         if AUTH_DISABLED or bool(session.get("logged_in")):
             return f(*args, **kwargs)
+        # 中控 iframe:Cookie 可能被拦,改认 embed_sso
+        try:
+            from lib.hub.hub_bridge_auth import hub_embed_sso_ok
+
+            if hub_embed_sso_ok(request):
+                session["logged_in"] = True
+                session.permanent = True
+                session.modified = True
+                return f(*args, **kwargs)
+        except Exception:
+            pass
         # API 必须返回 JSON,否则前端 r.json() 会报 Unexpected token...
         path = request.path or ""
         wants_json = (
@@ -5165,7 +5186,7 @@ def login_required(f):
             or "application/json" in (request.headers.get("Accept") or "")
         )
         if wants_json:
-            return jsonify({"ok": False, "msg": "未登录或会话过期,请重新登录"}), 401
+            return jsonify({"ok": False, "msg": "未登录或会话过期,请从中控重新打开工作台"}), 401
         return redirect("/login")
     return decorated
 
diff --git a/lib/common/static/hub_embed_auth.js b/lib/common/static/hub_embed_auth.js
new file mode 100644
index 0000000..265db02
--- /dev/null
+++ b/lib/common/static/hub_embed_auth.js
@@ -0,0 +1,63 @@
+/**
+ * 中控 iframe 嵌入鉴权:跨站时第三方 Cookie 常被拦截,改用 embed_sso 头维持登录.
+ * 须在其它业务脚本之前加载.
+ */
+(function () {
+  "use strict";
+  var KEY = "hub_embed_sso";
+  try {
+    var q = new URLSearchParams(location.search || "");
+    var fromUrl = (q.get("embed_sso") || "").trim();
+    if (fromUrl) {
+      sessionStorage.setItem(KEY, fromUrl);
+      q.delete("embed_sso");
+      var next = location.pathname;
+      var rest = q.toString();
+      if (rest) next += "?" + rest;
+      next += location.hash || "";
+      history.replaceState(null, "", next);
+    }
+  } catch (_) {}
+
+  function currentToken() {
+    try {
+      return (sessionStorage.getItem(KEY) || "").trim();
+    } catch (_) {
+      return "";
+    }
+  }
+
+  function withAuthHeaders(init) {
+    var tok = currentToken();
+    if (!tok) return init;
+    init = init ? Object.assign({}, init) : {};
+    var headers;
+    try {
+      headers = new Headers(init.headers || {});
+    } catch (_) {
+      headers = new Headers();
+    }
+    if (!headers.has("X-Hub-Embed-SSO")) {
+      headers.set("X-Hub-Embed-SSO", tok);
+    }
+    init.headers = headers;
+    if (!init.credentials) init.credentials = "same-origin";
+    return init;
+  }
+
+  if (typeof window.fetch === "function") {
+    var origFetch = window.fetch.bind(window);
+    window.fetch = function (input, init) {
+      return origFetch(input, withAuthHeaders(init));
+    };
+  }
+
+  window.HubEmbedAuth = {
+    token: currentToken,
+    clear: function () {
+      try {
+        sessionStorage.removeItem(KEY);
+      } catch (_) {}
+    },
+  };
+})();
diff --git a/lib/hub/hub_bridge_auth.py b/lib/hub/hub_bridge_auth.py
index 7748dbe..15dcfe1 100644
--- a/lib/hub/hub_bridge_auth.py
+++ b/lib/hub/hub_bridge_auth.py
@@ -83,6 +83,25 @@ def build_embed_open_url(
     return f"{root}/hub_sso?{q}"
 
 
+def extract_embed_sso(request) -> str:
+    """中控 iframe 内用的短期会话令牌(Cookie 被拦时的后备)."""
+    raw = (request.headers.get("X-Hub-Embed-SSO") or "").strip()
+    if raw:
+        return raw
+    return (request.args.get("embed_sso") or "").strip()
+
+
+def hub_embed_sso_ok(request) -> bool:
+    tok = extract_embed_sso(request)
+    return bool(tok and verify_sso_token(tok))
+
+
+def make_embed_session_token(bridge_token: str | None = None, *, ttl_sec: int = 604800) -> str:
+    """嵌入会话令牌(默认 7 天),算法与 SSO 相同."""
+    secret = (bridge_token if bridge_token is not None else hub_bridge_token()).strip()
+    return make_sso_token(secret, ttl_sec=ttl_sec)
+
+
 def frame_ancestors_header_value() -> Optional[str]:
     """
     HUB_EMBED_FRAME_ANCESTORS: 空格分隔 Origin,如 https://hub.local http://192.168.1.10:5100
diff --git a/lib/hub/hub_bridge_register.py b/lib/hub/hub_bridge_register.py
index 658ea6a..24ecbfd 100644
--- a/lib/hub/hub_bridge_register.py
+++ b/lib/hub/hub_bridge_register.py
@@ -4,10 +4,13 @@ from __future__ import annotations
 from typing import Any
 
 from flask import Flask, jsonify, redirect, request, session
+from urllib.parse import quote
 
 from lib.hub.hub_bridge_auth import (
     frame_ancestors_header_value,
+    hub_bridge_token,
     hub_bridge_token_ok,
+    make_embed_session_token,
     verify_sso_token,
 )
 
@@ -123,7 +126,11 @@ def register_hub_bridge_routes(app: Flask, app_module: Any) -> None:
             )
         session["logged_in"] = True
         session.permanent = True
-        return redirect(next_path)
+        session.modified = True
+        # iframe 跨站时常丢 Cookie:附带可放入 sessionStorage 的 embed_sso
+        embed_tok = make_embed_session_token(hub_bridge_token(), ttl_sec=604800)
+        joiner = "&" if "?" in next_path else "?"
+        return redirect(f"{next_path}{joiner}embed_sso={quote(embed_tok, safe='')}")
 
     @app.after_request
     def _hub_frame_ancestors(resp):
diff --git a/lib/instance/instance_settings_register.py b/lib/instance/instance_settings_register.py
index 7e371e8..2826fe8 100644
--- a/lib/instance/instance_settings_register.py
+++ b/lib/instance/instance_settings_register.py
@@ -44,6 +44,17 @@ def _api_login_required(hub_token_write_allowed: bool = False):
 
             # crypto_okx 可无 lib.hub;鉴权与中控 request_allowed 对齐
             allowed = bool(auth_disabled or logged_in)
+            if not allowed:
+                try:
+                    from lib.hub.hub_bridge_auth import hub_embed_sso_ok
+
+                    if hub_embed_sso_ok(request):
+                        session["logged_in"] = True
+                        session.permanent = True
+                        session.modified = True
+                        allowed = True
+                except Exception:
+                    pass
             if not allowed and hub_hdr and bridge and hub_hdr == bridge:
                 allowed = True
             if not allowed:
diff --git a/lib/instance/instance_static_lib.py b/lib/instance/instance_static_lib.py
index 769f348..7cd6dab 100644
--- a/lib/instance/instance_static_lib.py
+++ b/lib/instance/instance_static_lib.py
@@ -28,6 +28,7 @@ _COMMON_STATIC_ASSETS: dict[str, str] = {
     "journal_form_save.js": "application/javascript; charset=utf-8",
     "instance_page.css": "text/css; charset=utf-8",
     "instance_embed.js": "application/javascript; charset=utf-8",
+    "hub_embed_auth.js": "application/javascript; charset=utf-8",
     "instance_mobile_nav.js": "application/javascript; charset=utf-8",
     "instance_stats.js": "application/javascript; charset=utf-8",
     "instance_live.js": "application/javascript; charset=utf-8",
diff --git a/lib/instance/templates/embed_shell.html b/lib/instance/templates/embed_shell.html
index 5feb212..bfe77ab 100644
--- a/lib/instance/templates/embed_shell.html
+++ b/lib/instance/templates/embed_shell.html
@@ -3,6 +3,7 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
+    <script src="/static/hub_embed_auth.js?v=1"></script>
     <script src="/static/instance_theme.js?v=51"></script>
     <script src="/static/autofill_guard.js?v=1"></script>
     <link rel="stylesheet" href="/static/instance_theme_early.css?v=4">
diff --git a/tests/test_hub_bridge_auth.py b/tests/test_hub_bridge_auth.py
index d90658b..7b5e5a9 100644
--- a/tests/test_hub_bridge_auth.py
+++ b/tests/test_hub_bridge_auth.py
@@ -27,6 +27,12 @@ class HubBridgeAuthTests(unittest.TestCase):
         self.assertIn("token=", url)
         self.assertIn("next=%2Fembed", url)
 
+    def test_embed_session_token(self):
+        from lib.hub.hub_bridge_auth import make_embed_session_token
+
+        tok = make_embed_session_token("secret-token", ttl_sec=120)
+        self.assertTrue(verify_sso_token(tok, "secret-token"))
+
 
 if __name__ == "__main__":
     unittest.main()