diff --git a/src/mqtt_client_wrapper.cpp b/src/mqtt_client_wrapper.cpp
index 680681e..0aed6c6 100644
--- a/src/mqtt_client_wrapper.cpp
+++ b/src/mqtt_client_wrapper.cpp
@@ -96,13 +96,18 @@ static void handle_video_down_request(const nlohmann::json& req)
         return;
     }
 
-    // 取得当前所有 RTMP 播放地址
+    // ===== seqNo 自适应 =====
+    nlohmann::json seqNo = nullptr;
+    if (req.contains("seqNo"))
+    {
+        seqNo = req["seqNo"];
+    }
+
     auto channels_info = RTMPManager::get_all_channels_status();
 
-    // 构造响应
     nlohmann::json resp;
     resp["type"] = "response";
-    resp["seqNo"] = req.value("seqNo", "0");
+    if (!seqNo.is_null()) resp["seqNo"] = seqNo;
     resp["data"] = nlohmann::json::array();
 
     int loc = 0;
@@ -112,19 +117,24 @@ static void handle_video_down_request(const nlohmann::json& req)
         loc++;
     }
 
-    // 发布回复
     mqtt_client->publish(g_app_config.mqtt.topics.video_down, resp.dump(-1), 1);
 }
 
 static void handle_record_query_request(const nlohmann::json& req)
 {
-    // 1. 解析字段
     if (!req.contains("data") || !req["data"].is_object())
     {
         LOG_WARN("[record_query] missing data");
         return;
     }
 
+    // ===== seqNo 自适应 =====
+    nlohmann::json seqNo = nullptr;
+    if (req.contains("seqNo"))
+    {
+        seqNo = req["seqNo"];
+    }
+
     const auto& d = req["data"];
     int loc = d.value("loc", -1);
     int64_t start = d.value("startTime", -1LL);
@@ -136,12 +146,6 @@ static void handle_record_query_request(const nlohmann::json& req)
         return;
     }
 
-    LOG_INFO("[record_query] loc=" + std::to_string(loc) + " start=" + std::to_string(start) +
-             " end=" + std::to_string(end));
-
-    // 2. 计算 stream 名
-    //    loc → stream，比如：
-    //    0 → "AHD1_main"
     std::string stream = RecordManager::loc_to_stream(loc);
     if (stream.empty())
     {
@@ -149,15 +153,11 @@ static void handle_record_query_request(const nlohmann::json& req)
         return;
     }
 
-    // 3. 向 RecordManager 查询录像段
     auto segs = g_record_manager->querySegments(stream, start, end);
 
-    LOG_INFO("[record_query] Found segments=" + std::to_string(segs.size()));
-
-    // 4. 构造响应 JSON
     nlohmann::json resp;
     resp["type"] = "response";
-    resp["seqNo"] = req.value("seqNo", "0");
+    if (!seqNo.is_null()) resp["seqNo"] = seqNo;
 
     nlohmann::json data;
     data["loc"] = loc;
@@ -166,31 +166,31 @@ static void handle_record_query_request(const nlohmann::json& req)
     int idx = 1;
     for (const auto& seg : segs)
     {
-        nlohmann::json s;
-        s["index"] = idx++;
-        s["segmentId"] = seg.segment_id;
-        s["startTime"] = seg.start_ms;
-        s["endTime"] = seg.end_ms;
-        data["segments"].push_back(s);
+        data["segments"].push_back(
+            {{"index", idx++}, {"segmentId", seg.segment_id}, {"startTime", seg.start_ms}, {"endTime", seg.end_ms}});
     }
 
     resp["data"] = data;
 
-    // 5. 发送 MQTT
     mqtt_client->publish(g_app_config.mqtt.topics.record_query, resp.dump(-1), 1);
 }
 
 static void handle_record_play_request(const nlohmann::json& req)
 {
-    // 1. 解析参数
     if (!req.contains("data") || !req["data"].is_object())
     {
         LOG_WARN("[record_play] missing data");
         return;
     }
 
-    const auto& d = req["data"];
+    // ===== seqNo 自适应 =====
+    nlohmann::json seqNo = nullptr;
+    if (req.contains("seqNo"))
+    {
+        seqNo = req["seqNo"];
+    }
 
+    const auto& d = req["data"];
     int loc = d.value("loc", -1);
     std::string segmentId = d.value("segmentId", "");
 
@@ -200,9 +200,6 @@ static void handle_record_play_request(const nlohmann::json& req)
         return;
     }
 
-    LOG_INFO("[record_play] loc=" + std::to_string(loc) + " segmentId=" + segmentId);
-
-    // 2. 根据 segmentId 获取录像段
     auto seg = g_record_manager->getSegment(segmentId);
     if (seg.files.empty())
     {
@@ -210,19 +207,16 @@ static void handle_record_play_request(const nlohmann::json& req)
         return;
     }
 
-    // 3. 计算总时长
     int64_t duration = seg.end_ms - seg.start_ms;
 
-    // 4. 获取播放地址前缀
     std::string ip = get_ip_address("enP2p33s0");
     if (ip.empty()) ip = "127.0.0.1";
 
     int http_port = g_record_manager->getHttpPort();
 
-    // 5. 构造响应
     nlohmann::json resp;
     resp["type"] = "response";
-    resp["seqNo"] = req.value("seqNo", "0");
+    if (!seqNo.is_null()) resp["seqNo"] = seqNo;
 
     nlohmann::json data;
     data["loc"] = loc;
@@ -231,23 +225,19 @@ static void handle_record_play_request(const nlohmann::json& req)
     data["endTime"] = seg.end_ms;
     data["duration"] = duration;
 
-    int index = 1;
-
-    // 6. 单文件列表
     nlohmann::json files = nlohmann::json::array();
+    int index = 1;
     for (auto& f : seg.files)
     {
-        nlohmann::json item;
-        item["index"] = index++;
-        item["url"] = "http://" + ip + ":" + std::to_string(http_port) + f.path;
-        item["startTime"] = f.start_ms;
-        item["endTime"] = f.end_ms;
-        files.push_back(item);
+        files.push_back({{"index", index++},
+                         {"url", "http://" + ip + ":" + std::to_string(http_port) + f.path},
+                         {"startTime", f.start_ms},
+                         {"endTime", f.end_ms}});
     }
+
     data["files"] = files;
     resp["data"] = data;
 
-    // 7. 回复 MQTT
     mqtt_client->publish(g_app_config.mqtt.topics.record_play, resp.dump(), 1);
 }