diff --git a/.memory/worklog.json b/.memory/worklog.json
index 3d285a1..dbbe349 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -2388,6 +2388,19 @@
       "message": "auto-save 2026-05-13 21:02 (~2)",
       "hash": "21c5a2b",
       "files_changed": 2
+    },
+    {
+      "ts": "2026-05-13T21:07:56+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-13 21:07 (~4)",
+      "hash": "efe984b",
+      "files_changed": 4
+    },
+    {
+      "ts": "2026-05-13T13:09:30Z",
+      "type": "session-heartbeat",
+      "message": "Codex 会话活跃 · 最近命令：codex · 2 项未提交变更 · 最近提交：auto-save 2026-05-13 21:07 (~4)",
+      "files_changed": 2
     }
   ]
 }
diff --git a/api/.env.example b/api/.env.example
index b7feb73..4e9b5f5 100644
--- a/api/.env.example
+++ b/api/.env.example
@@ -19,7 +19,7 @@ POE_API_KEY=
 # 火山方舟 Seedance 视频 API 可直接覆盖这里：
 # VIDEO_API_BASE_URL=https://ark.cn-beijing.volces.com/api/v3
 # VIDEO_API_KEY=
-# VIDEO_MODEL_SEEDANCE=doubao-seedance-1-0-pro-fast-250528
+# VIDEO_MODEL_SEEDANCE=doubao-seedance-2-0-fast-260128
 # VIDEO_CREATE_PATHS=/contents/generations/tasks
 # VIDEO_STATUS_PATH=/contents/generations/tasks/{id}
 #
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index 21c1eab..18a8786 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -838,7 +838,7 @@ api/main.py
             </header>
             <div class="body">
               <p><strong>问题：</strong>用户提供火山方舟 <code>https://ark.cn-beijing.volces.com/api/v3</code> 作为生视频通道；这个通道不是 Poe 的 <code>/videos</code> 形态，而是内容生成异步任务。</p>
-              <p><strong>改动：</strong>后端识别 Ark base 后，提交改为 <code>POST /contents/generations/tasks</code>，请求体使用 <code>content</code> 数组：文本 prompt + 首帧 <code>image_url</code> data URL；轮询改为 <code>GET /contents/generations/tasks/{id}</code>，成功后读取 <code>content.video_url</code> 下载 MP4。</p>
+              <p><strong>改动：</strong>后端识别 Ark base 后，提交改为 <code>POST /contents/generations/tasks</code>，请求体使用 <code>content</code> 数组：文本 prompt + 首帧 <code>image_url</code> data URL；轮询改为 <code>GET /contents/generations/tasks/{id}</code>，成功后读取 <code>content.video_url</code> 下载 MP4。本机默认 Seedance 模型改为 Ark 可见的 <code>doubao-seedance-2-0-fast-260128</code>。</p>
               <p><strong>影响：</strong><code>api/main.py</code>、<code>api/.env.example</code>、<code>docs/source-analysis.html</code>。本机 <code>api/.env</code> 需要把 <code>VIDEO_API_BASE_URL</code>/<code>VIDEO_API_KEY</code>/<code>VIDEO_CREATE_PATHS</code>/<code>VIDEO_STATUS_PATH</code> 指向 Ark。</p>
             </div>
           </article>