diff --git a/.memory/worklog.json b/.memory/worklog.json
index 8479a1a..9f360a5 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -1,26 +1,5 @@
 {
   "entries": [
-    {
-      "files_changed": 1,
-      "hash": "f2d817d",
-      "message": "auto-save 2026-05-13 01:07 (~1)",
-      "ts": "2026-05-13T01:07:25+08:00",
-      "type": "commit"
-    },
-    {
-      "files_changed": 1,
-      "hash": "e42ae5b",
-      "message": "auto-save 2026-05-13 01:13 (~1)",
-      "ts": "2026-05-13T01:13:20+08:00",
-      "type": "commit"
-    },
-    {
-      "files_changed": 1,
-      "hash": "5086534",
-      "message": "auto-save 2026-05-13 01:19 (~1)",
-      "ts": "2026-05-13T01:19:16+08:00",
-      "type": "commit"
-    },
     {
       "files_changed": 1,
       "hash": "7a31e86",
@@ -3315,6 +3294,25 @@
       "message": "auto-save 2026-05-14 10:20 (~7)",
       "hash": "be1ae80",
       "files_changed": 7
+    },
+    {
+      "ts": "2026-05-14T10:25:50+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-14 10:25 (~13)",
+      "hash": "7bfbb38",
+      "files_changed": 13
+    },
+    {
+      "ts": "2026-05-14T02:26:09Z",
+      "type": "session-heartbeat",
+      "message": "Codex 会话活跃 · 最近命令：codex · 3 项未提交变更 · 最近提交：auto-save 2026-05-14 10:25 (~13)",
+      "files_changed": 3
+    },
+    {
+      "ts": "2026-05-14T02:28:38Z",
+      "type": "session-heartbeat",
+      "message": "Codex 会话活跃 · 最近命令：codex · 4 项未提交变更 · 最近提交：auto-save 2026-05-14 10:25 (~13)",
+      "files_changed": 4
     }
   ]
 }
diff --git a/api/.env.example b/api/.env.example
index 750f219..648db3a 100644
--- a/api/.env.example
+++ b/api/.env.example
@@ -31,6 +31,10 @@ POE_API_KEY=
 # VIDEO_CREATE_PATHS=/contents/generations/tasks
 # VIDEO_STATUS_PATH=/contents/generations/tasks/{id}
 #
+# SKG 豆包/Seedance 视频网关也使用同一套 content JSON 提交格式：
+# VIDEO_API_BASE_URL=https://ai.skg.com/doubao
+# VIDEO_API_KEY=
+#
 # 自定义视频网关覆盖；留空时如配置 POE_API_KEY，则走 Poe。
 VIDEO_API_BASE_URL=
 VIDEO_API_KEY=
@@ -39,6 +43,7 @@ VIDEO_CREATE_PATHS=/videos
 VIDEO_STATUS_PATH=/videos/{id}
 VIDEO_CONTENT_PATH=/videos/{id}/content
 VIDEO_DURATION_FIELD=seconds
+VIDEO_POLL_TIMEOUT_SECONDS=900
 
 # 工作目录
 KEYFRAME_COUNT=12
diff --git a/api/main.py b/api/main.py
index cf608fc..7860287 100644
--- a/api/main.py
+++ b/api/main.py
@@ -83,6 +83,7 @@ VIDEO_CREATE_PATHS = [
 VIDEO_STATUS_PATH = os.getenv("VIDEO_STATUS_PATH", "/videos/{id}").strip() or "/videos/{id}"
 VIDEO_CONTENT_PATH = os.getenv("VIDEO_CONTENT_PATH", "/videos/{id}/content").strip() or "/videos/{id}/content"
 VIDEO_DURATION_FIELD = os.getenv("VIDEO_DURATION_FIELD", "seconds").strip() or "seconds"
+VIDEO_POLL_TIMEOUT_SECONDS = max(60, int(os.getenv("VIDEO_POLL_TIMEOUT_SECONDS", "900")))
 
 # OpenAI 客户端（OpenAI 兼容网关，含 SKG ezlink）
 from openai import OpenAI
@@ -415,7 +416,8 @@ def video_uses_poe() -> bool:
 
 
 def video_uses_ark() -> bool:
-    return "ark.cn-beijing.volces.com" in video_api_base()
+    base = video_api_base()
+    return "ark.cn-beijing.volces.com" in base or "ai.skg.com/doubao" in base
 
 
 def video_api_base() -> str:
@@ -3198,7 +3200,7 @@ def render_storyboard_video(
             direct_url = video_url_from_response(data)
             update_generated_video(job_id, local_id, provider_id=video_api_id, status=status, progress=progress)
 
-            deadline = time.time() + 420
+            deadline = time.time() + VIDEO_POLL_TIMEOUT_SECONDS
             while status in {"queued", "in_progress"} and time.time() < deadline:
                 time.sleep(8)
                 poll = client.get(f"{base}{video_path(VIDEO_STATUS_PATH, id=video_api_id)}", headers=headers)
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index 875317f..93ec2b3 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -874,7 +874,7 @@ SubjectAsset {
               <li>ASR：仍依赖当前 OpenAI-compatible 音频转写入口；如果该网关 audio endpoint 不通，文案提取仍会失败。</li>
               <li>MiniMax：当前接入的是官方 T2A 配音能力，不是 ASR；API Key 只能放本地环境变量，不能写入仓库。</li>
               <li>Audio Product Brief：默认是通用 SKG 放松产品卖点，后续可改成跟已选产品库条目联动。</li>
-              <li>Video Gen：模型层按业务保留 Seedance / Kling / Veo/Voe 选择；后端已支持 Poe 视频通道，别名默认映射到 <code>seedance-2-fast</code>、<code>kling-omni</code>、<code>veo-3.1-fast</code>，提交后写入 Video Gen 节点。</li>
+              <li>Video Gen：模型层按业务保留 Seedance / Kling / Veo/Voe 选择；后端已支持 Poe、火山方舟和 SKG 豆包视频网关。Seedance 可通过 <code>VIDEO_API_BASE_URL=https://ai.skg.com/doubao</code> 走 content JSON 异步任务，提交后写入 Video Gen 节点并轮询到完成。</li>
               <li>Compose：还没做本地 ffmpeg 字幕/TTS 合成。</li>
             </ul>
           </div>
@@ -914,6 +914,18 @@ SubjectAsset {
         <h2>变更记录</h2>
         <p>这个记录不是 git log 的替代品。它记录“产品理解发生了什么变化、影响了哪些源码、你以后描述需求时该怎么说”。后续每次改功能都要补一条。</p>
         <div class="changelog">
+          <article class="change">
+            <header>
+              <h3>2026-05-14 · 生视频接入 SKG 豆包网关</h3>
+              <span class="tag orange">Video Gen</span>
+              <span class="tag blue">Seedance</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>用户提供 <code>https://ai.skg.com/doubao</code> 作为视频模型网关；该网关应按 Seedance / 方舟内容生成任务格式提交，而不能误走普通 multipart 上传。</p>
+              <p><strong>改动：</strong><code>video_uses_ark()</code> 现在同时识别火山方舟域名和 <code>ai.skg.com/doubao</code>，统一使用 <code>content</code> JSON：文本 prompt、首帧、尾帧和产品参考图作为不同 role 传入，再按 <code>/contents/generations/tasks/{id}</code> 轮询。<code>api/.env.example</code> 增加 SKG 豆包视频网关配置示例；生视频轮询上限改为 <code>VIDEO_POLL_TIMEOUT_SECONDS</code>，默认 900 秒，避免慢任务过早失败。</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> 已配置 <code>VIDEO_API_BASE_URL=https://ai.skg.com/doubao</code> 和视频专用 key。</p>
+            </div>
+          </article>
           <article class="change">
             <header>
               <h3>2026-05-14 · 音频处理接入 SKG 口播改写与 MiniMax 配音</h3>