diff --git a/internal/web/ui/templates/layout.html b/internal/web/ui/templates/layout.html
index 397700f..e16b654 100644
--- a/internal/web/ui/templates/layout.html
+++ b/internal/web/ui/templates/layout.html
@@ -73,7 +73,7 @@
           <a class="topbar-icon-btn" href="/ui/alarms" aria-label="告警中心" title="告警中心" id="topbar-alarm-btn">
             {{icon "bell"}}
             <span class="topbar-dot" id="alarm-dot" {{if eq .UnacknowledgedAlarmCount 0}}hidden{{end}} aria-hidden="true"></span>
-            <span class="topbar-badge" id="alarm-badge" {{if eq .UnacknowledgedAlarmCount 0}}hidden{{end}}>{{.UnacknowledgedAlarmCount}}</span>
+            <span class="topbar-badge" id="alarm-badge" {{if eq .UnacknowledgedAlarmCount 0}}hidden{{end}}>{{if gt .UnacknowledgedAlarmCount 99}}99+{{else}}{{.UnacknowledgedAlarmCount}}{{end}}</span>
           </a>
           <a class="topbar-icon-btn" href="/ui/system" aria-label="系统" title="系统">
             {{icon "system"}}