diff --git a/src/camera.cpp b/src/camera.cpp
index 1b5b6fa..fa9f635 100644
--- a/src/camera.cpp
+++ b/src/camera.cpp
@@ -1035,7 +1035,10 @@ static void motor_update(bool zebra_block, bool tl_block)
     if (boost_factor() > 1.0) {
         spd = 26.0;                           // 起步弹射
     } else if (g_zstate == Z_COOLDOWN) {
-        spd = 16.0;                           // 冷却期定速
+        spd = 16.0;                           // 冷却期基础速度
+        time_t elapsed = time(nullptr) - g_ztime;
+        if (elapsed >= 3.3 && elapsed < 5)
+            spd = std::min(spd, 13.0);        // 3.3~5s 降速
     } else {
         spd = target_speed;                   // 正常行驶
     }