diff --git a/apps/web/src/stores/alertStore.js b/apps/web/src/stores/alertStore.js
index 804d260..2529380 100644
--- a/apps/web/src/stores/alertStore.js
+++ b/apps/web/src/stores/alertStore.js
@@ -84,6 +84,17 @@ export const useAlertStore = defineStore('alerts', () => {
   }
 
   // ---- 桌面通知 ----
+  const activeNotifyOffsets = new Set()
+  const NOTIFY_STEP = 80
+
+  function getAvailableOffset() {
+    let offset = 0
+    while (activeNotifyOffsets.has(offset)) {
+      offset += NOTIFY_STEP
+    }
+    return offset
+  }
+
   function showDesktopNotification(alert) {
     const severityLabels = {
       critical: '严重',
@@ -94,6 +105,8 @@ export const useAlertStore = defineStore('alerts', () => {
     }
     const label = severityLabels[alert.severity] || alert.severity
     const typeName = alert.event_type || '未知事件'
+    const offset = getAvailableOffset()
+    activeNotifyOffsets.add(offset)
 
     ElNotification({
       title: `[${label}] ${typeName}`,
@@ -103,10 +116,15 @@ export const useAlertStore = defineStore('alerts', () => {
       type: alert.severity === 'critical' || alert.severity === 'high'
         ? 'warning'
         : 'info',
-      duration: alert.severity === 'critical' ? 0 : 4500,
+      duration: 5000,
+      offset,
+      showClose: true,
       dangerouslyUseHTMLString: false,
       onClick: () => {
         markAsRead(alert.alert_id)
+      },
+      onClose: () => {
+        activeNotifyOffsets.delete(offset)
       }
     })
   }
diff --git a/apps/web/src/views/AlertList.vue b/apps/web/src/views/AlertList.vue
index 11c85f5..dc625b7 100644
--- a/apps/web/src/views/AlertList.vue
+++ b/apps/web/src/views/AlertList.vue
@@ -29,6 +29,7 @@
           class="filter-control"
           @change="applyFilter"
         >
+          <el-option label="全部" value="" />
           <el-option label="严重" value="critical" />
           <el-option label="高危" value="high" />
           <el-option label="中等" value="medium" />
@@ -44,6 +45,7 @@
           class="filter-control"
           @change="applyFilter"
         >
+          <el-option label="全部" value="" />
           <el-option label="火灾" value="fire" />
           <el-option label="烟雾" value="smoke" />
           <el-option label="抽烟" value="smoking" />