diff --git a/PROGRESS.md b/PROGRESS.md
index 3ada729..03e392d 100644
--- a/PROGRESS.md
+++ b/PROGRESS.md
@@ -2,7 +2,7 @@
 
 > 配合 `DESIGN.md`。本文件只记 phase 状态、决策偏差、文件量、下一步。每条 1-2 句:做了啥 + 关键判断;细节查 `git log` / `git diff` / `DESIGN §7.9`。
 
-最后更新:2026-06-30(web 端 SVG 预览修复:强制 image/svg+xml + bump 0.33.1)
+最后更新:2026-06-30(look_at_image 超时透明重试 + 超时 60→120s + bump 0.33.2)
 
 ---
 
@@ -21,6 +21,9 @@
 
 ## 已完成关键能力
 
+### 2026-06-30 / look_at_image 偶发超时:tool 内透明重试 + 超时上限提到 120s(bump 0.33.2)
+Seed 2.0 Lite 非流式,长 OCR 首字节可能逼近 60s read timeout → 偶发超时,且返 `[Error]` 会触发主模型重发整个 tool call(图 base64 重传、输入 token 再付一次,正中"报错重试烧 token"根因)。修法:`ark_client` 新增 `ArkTimeoutError(ArkError)` 子类(仅超时/网络抖动抛它,HTTP 4xx/5xx 业务错误仍抛普通 `ArkError` 不重试);`look_at_image` 对该子类退避重试(`timeout_retries` 默认 1 次,退避 2^n s),在 tool 内消化掉不抛给主模型;`doubao.yaml` vision `request_timeout_s` 60→120。子类仍是 `ArkError`,seedream 等现有 `except ArkError` 不受影响。
+
 ### 2026-06-30 / 修复 web 端 SVG 无法预览(bump 0.33.1)
 SVG 在 `<img>` 里必须 Content-Type=`image/svg+xml` 才渲染。前端 `preview.js` 的 `_showImage` / mini 图片分支据扩展名强制 blob mime(与服务端响应头无关);后端 `download` 接口对 `.svg` 显式回 `image/svg+xml`(部分部署环境 mimetypes 未注册 svg → 会被 FileResponse 猜成 octet-stream)。双保险。
 
diff --git a/config/media/doubao.yaml b/config/media/doubao.yaml
index 582288e..11d2946 100644
--- a/config/media/doubao.yaml
+++ b/config/media/doubao.yaml
@@ -40,7 +40,8 @@ vision:
     price_cny_per_mtoken_output: 3.6
     price_cny_per_mtoken_cache_hit: 0.12
     max_image_mb: 10               # 单图上限(超出 tool 侧直接报错,不发请求)
-    request_timeout_s: 60          # 读图慢于此判超时
+    request_timeout_s: 120         # 读图慢于此判超时(非流式,长 OCR 首字节可能逼近上限)
+    timeout_retries: 1             # 超时/网络抖动 tool 内透明重试次数(退避 2^n s);不含业务错误
 
 video:
   # fast 放第一个 → 默认 variant(成本敏感场景优先);开通了 Pro 的用户从顶栏下拉切。
diff --git a/core/__init__.py b/core/__init__.py
index ca29ba6..3632376 100644
--- a/core/__init__.py
+++ b/core/__init__.py
@@ -1,3 +1,3 @@
 # zcbot 版本号单一事实源:web/app.py 的 FastAPI version、/healthz 返回、前端展示都引这里。
 # 改版本只动这一行。
-__version__ = "0.33.1"
+__version__ = "0.33.2"
diff --git a/core/ark_client.py b/core/ark_client.py
index db98bf8..b66e654 100644
--- a/core/ark_client.py
+++ b/core/ark_client.py
@@ -23,6 +23,14 @@ class ArkError(RuntimeError):
     """ark API 调用失败的统一异常。"""
 
 
+class ArkTimeoutError(ArkError):
+    """可重试的瞬时失败:请求超时 / 网络抖动(非业务错误)。
+
+    HTTP 4xx/5xx 业务错误仍抛普通 ArkError(不该重试,重试也是同样的错)。
+    caller 可单独 catch 本子类做退避重试;catch ArkError 仍能兜住(isinstance)。
+    """
+
+
 @dataclass
 class ArkConfig:
     api_key: str
@@ -73,18 +81,18 @@ class ArkClient:
         try:
             resp = self._client.post(path, json=body, timeout=timeout_s or self.timeout_s)
         except httpx.TimeoutException as e:
-            raise ArkError(f"timeout calling POST {path}: {e}") from e
+            raise ArkTimeoutError(f"timeout calling POST {path}: {e}") from e
         except httpx.HTTPError as e:
-            raise ArkError(f"network error calling POST {path}: {e}") from e
+            raise ArkTimeoutError(f"network error calling POST {path}: {e}") from e
         return self._parse(resp, f"POST {path}")
 
     def get_json(self, path: str, *, timeout_s: Optional[float] = None) -> dict:
         try:
             resp = self._client.get(path, timeout=timeout_s or self.timeout_s)
         except httpx.TimeoutException as e:
-            raise ArkError(f"timeout calling GET {path}: {e}") from e
+            raise ArkTimeoutError(f"timeout calling GET {path}: {e}") from e
         except httpx.HTTPError as e:
-            raise ArkError(f"network error calling GET {path}: {e}") from e
+            raise ArkTimeoutError(f"network error calling GET {path}: {e}") from e
         return self._parse(resp, f"GET {path}")
 
     @staticmethod
diff --git a/tools/look_at_image.py b/tools/look_at_image.py
index 9ec0af6..4485c14 100644
--- a/tools/look_at_image.py
+++ b/tools/look_at_image.py
@@ -13,7 +13,9 @@ from pathlib import Path
 from typing import Any, Optional
 from uuid import UUID
 
-from core.ark_client import ArkClient, ArkConfig, ArkError
+import time
+
+from core.ark_client import ArkClient, ArkConfig, ArkError, ArkTimeoutError
 from core.storage.usage import record_vision_usage
 
 from .base import Tool, compact_tool_output
@@ -113,11 +115,26 @@ class LookAtImageTool(Tool):
             ],
         }
 
-        try:
-            with ArkClient(self.ark_cfg, timeout_s=timeout_s) as client:
-                resp = client.post_json(endpoint, body, timeout_s=timeout_s)
-        except ArkError as e:
-            return f"[Error] look_at_image API: {e}"
+        # 透明重试:Seed 2.0 Lite 非流式,长 OCR 偶发超时/网络抖动。tool 内消化掉,
+        # 不把 [Error] 抛给主模型 —— 否则主模型会重发整个 tool call(图 base64 重传、
+        # 输入 token 再付一次)。仅 ArkTimeoutError(超时/网络)重试;HTTP 业务错误不重试。
+        max_attempts = int(cfg.get("timeout_retries", 1)) + 1
+        resp = None
+        for attempt in range(max_attempts):
+            try:
+                with ArkClient(self.ark_cfg, timeout_s=timeout_s) as client:
+                    resp = client.post_json(endpoint, body, timeout_s=timeout_s)
+                break
+            except ArkTimeoutError as e:
+                if attempt == max_attempts - 1:
+                    return f"[Error] look_at_image API: {e}(已重试 {attempt} 次仍超时)"
+                print(
+                    f"[look_at_image] timeout, retrying ({attempt + 1}/{max_attempts - 1}): {e}",
+                    flush=True,
+                )
+                time.sleep(2 ** attempt)
+            except ArkError as e:
+                return f"[Error] look_at_image API: {e}"
 
         answer = self._extract_answer(resp)
         if not answer: