diff --git a/dns-server b/dns-server
new file mode 100755
index 0000000..506b105
Binary files /dev/null and b/dns-server differ
diff --git a/dns/server.go b/dns/server.go
index 5ae7e05..11596b3 100644
--- a/dns/server.go
+++ b/dns/server.go
@@ -327,8 +327,8 @@ func (s *Server) handleDNSRequest(w dns.ResponseWriter, r *dns.Msg) {
 		response.SetRcode(r, dns.RcodeRefused)
 		w.WriteMsg(response)
 
-		// 计算响应时间
-		responseTime := time.Since(startTime).Milliseconds()
+		// 缓存命中，响应时间设为0ms
+		responseTime := int64(0)
 		s.updateStats(func(stats *Stats) {
 			stats.TotalResponseTime += responseTime
 			if stats.Queries > 0 {
@@ -344,8 +344,8 @@ func (s *Server) handleDNSRequest(w dns.ResponseWriter, r *dns.Msg) {
 	// 检查hosts文件是否有匹配
 	if ip, exists := s.shieldManager.GetHostsIP(domain); exists {
 		s.handleHostsResponse(w, r, ip)
-		// 计算响应时间
-		responseTime := time.Since(startTime).Milliseconds()
+		// 缓存命中，响应时间设为0ms
+		responseTime := int64(0)
 		s.updateStats(func(stats *Stats) {
 			stats.TotalResponseTime += responseTime
 			if stats.Queries > 0 {
@@ -404,14 +404,19 @@ func (s *Server) handleDNSRequest(w dns.ResponseWriter, r *dns.Msg) {
 	}
 
 	// 缓存未命中，转发到上游DNS服务器
-	response, _ := s.forwardDNSRequestWithCache(r, domain)
+	response, rtt := s.forwardDNSRequestWithCache(r, domain)
 	if response != nil {
 		// 写入响应给客户端
 		w.WriteMsg(response)
 	}
 
-	// 计算响应时间
-	responseTime := time.Since(startTime).Milliseconds()
+	// 使用上游服务器的实际响应时间（转换为毫秒）
+	responseTime := int64(rtt.Milliseconds())
+	// 如果rtt为0（查询失败），则使用本地计算的时间
+	if responseTime == 0 {
+		responseTime = time.Since(startTime).Milliseconds()
+	}
+
 	s.updateStats(func(stats *Stats) {
 		stats.TotalResponseTime += responseTime
 		if stats.Queries > 0 {
diff --git a/shield_stats.json b/shield_stats.json
new file mode 100644
index 0000000..d99d506
--- /dev/null
+++ b/shield_stats.json
@@ -0,0 +1,5 @@
+{
+  "blockedDomainsCount": {},
+  "resolvedDomainsCount": {},
+  "lastSaved": "2025-11-29T02:08:50.6341349+08:00"
+}
\ No newline at end of file
diff --git a/static/js/dashboard.js b/static/js/dashboard.js
index 7504c06..f75f26a 100644
--- a/static/js/dashboard.js
+++ b/static/js/dashboard.js
@@ -12,6 +12,12 @@ let dashboardWsReconnectTimer = null;
 let statCardCharts = {};
 // 存储统计卡片历史数据
 let statCardHistoryData = {};
+// 存储仪表盘历史数据，用于计算趋势
+window.dashboardHistoryData = window.dashboardHistoryData || {
+    prevResponseTime: null,
+    prevActiveIPs: null,
+    prevTopQueryTypeCount: null
+};
 
 // 引入颜色配置文件
 const COLOR_CONFIG = window.COLOR_CONFIG || {};
@@ -192,14 +198,42 @@ function processRealTimeData(stats) {
         
         if (document.getElementById('top-query-type')) {
             const queryType = stats.topQueryType || '---';
+            document.getElementById('top-query-type').textContent = queryType;
             
             const queryPercentElem = document.getElementById('query-type-percentage');
             if (queryPercentElem) {
-                queryPercentElem.textContent = '• ---';
-                queryPercentElem.className = 'text-sm flex items-center text-gray-500';
+                // 计算查询类型趋势
+                let queryPercent = '---';
+                let trendClass = 'text-gray-400';
+                let trendIcon = '---';
+                
+                if (stats.topQueryTypeCount !== undefined && stats.topQueryTypeCount !== null) {
+                    // 存储当前值用于下次计算趋势
+                    const prevTopQueryTypeCount = window.dashboardHistoryData.prevTopQueryTypeCount || stats.topQueryTypeCount;
+                    window.dashboardHistoryData.prevTopQueryTypeCount = stats.topQueryTypeCount;
+                    
+                    // 计算变化百分比
+                    if (prevTopQueryTypeCount > 0) {
+                        const changePercent = ((stats.topQueryTypeCount - prevTopQueryTypeCount) / prevTopQueryTypeCount) * 100;
+                        queryPercent = Math.abs(changePercent).toFixed(1) + '%';
+                        
+                        // 设置趋势图标和颜色
+                        if (changePercent > 0) {
+                            trendIcon = '↑';
+                            trendClass = 'text-primary';
+                        } else if (changePercent < 0) {
+                            trendIcon = '↓';
+                            trendClass = 'text-secondary';
+                        } else {
+                            trendIcon = '•';
+                            trendClass = 'text-gray-500';
+                        }
+                    }
+                }
+                
+                queryPercentElem.textContent = trendIcon + ' ' + queryPercent;
+                queryPercentElem.className = `text-sm flex items-center ${trendClass}`;
             }
-            
-            document.getElementById('top-query-type').textContent = queryType;
         }
         
         if (document.getElementById('active-ips')) {