diff --git a/scripts/linux/lib/common.sh b/scripts/linux/lib/common.sh
index 3b9bb9c..a53993e 100644
--- a/scripts/linux/lib/common.sh
+++ b/scripts/linux/lib/common.sh
@@ -256,6 +256,9 @@ Restart=always
 RestartSec=5
 # 避免构建/依赖短暂失败时触发 systemd 默认「5 次/10s」后永久停跑（表现为 live-edge 502、:8001 无监听）
 StartLimitIntervalSec=0
+# 首次 npm build / 冷启动较慢；过小会导致主进程在 listen 前被 SIGTERM
+TimeoutStartSec=300
+TimeoutStopSec=30
 
 [Install]
 WantedBy=multi-user.target
diff --git a/web.py b/web.py
index 93226f6..649024f 100644
--- a/web.py
+++ b/web.py
@@ -342,12 +342,17 @@ async def lifespan(app: FastAPI):
     except Exception:
         # PM2/Shell 异常时不阻塞整站启动（否则反代持续 502）
         pass
-    try:
-        ok, msg = await asyncio.to_thread(ensure_scrcpy_jar, BASE_DIR)
-        if not ok:
-            print(f"[web] scrcpy-server: {msg}", file=sys.stderr)
-    except Exception as exc:
-        print(f"[web] scrcpy-server bootstrap: {exc}", file=sys.stderr)
+
+    # scrcpy-server 下载可走外网重试，勿阻塞启动；否则 systemd 默认 TimeoutStartSec≈90s 会杀进程，:8001 永不起
+    async def _bootstrap_scrcpy() -> None:
+        try:
+            ok, msg = await asyncio.to_thread(ensure_scrcpy_jar, BASE_DIR)
+            if not ok:
+                print(f"[web] scrcpy-server: {msg}", file=sys.stderr)
+        except Exception as exc:
+            print(f"[web] scrcpy-server bootstrap: {exc}", file=sys.stderr)
+
+    asyncio.create_task(_bootstrap_scrcpy())
     yield