diff --git a/src/views/KeywordsCache.vue b/src/views/KeywordsCache.vue
index ea46a36..aa7081e 100644
--- a/src/views/KeywordsCache.vue
+++ b/src/views/KeywordsCache.vue
@@ -6,7 +6,7 @@ const loading = ref(true)
 const error = ref(null)
 const stats = ref({ size: 0, max_size: 10000 })
 const items = ref([])          // 当前页数据
-const expandedUrls = ref(new Set())
+const expandedUrls = ref({})   // 使用普通对象存储展开状态，避免 Set 的响应式开销
 const urlKeywords = ref({})
 const loadingKeywords = ref(new Set())
 const search = ref('')
@@ -48,7 +48,9 @@ async function load() {
     items.value = data.items || []
 
     // 默认全部展开
-    items.value.forEach(item => expandedUrls.value.add(item.url))
+    const expanded = {}
+    items.value.forEach(item => expanded[item.url] = true)
+    expandedUrls.value = expanded
     // 预加载当前页关键词
     items.value.forEach(item => {
       if (item.keywords?.length) {
@@ -97,12 +99,16 @@ function onSearch() {
 }
 
 async function toggleKeywords(url) {
-  if (expandedUrls.value.has(url)) {
-    expandedUrls.value.delete(url)
+  if (expandedUrls.value[url]) {
+    // 关闭：删除展开状态
+    const newExpanded = { ...expandedUrls.value }
+    delete newExpanded[url]
+    expandedUrls.value = newExpanded
     return
   }
 
-  expandedUrls.value.add(url)
+  // 展开
+  expandedUrls.value = { ...expandedUrls.value, [url]: true }
 
   if (urlKeywords.value[url]) return
 
@@ -221,7 +227,7 @@ function truncateSnippet(text, maxLen = 200) {
           <!-- URL 标题行 -->
           <div class="flex items-start gap-2 mb-1">
             <span class="shrink-0 text-gray-600 mt-0.5 text-xs select-none">
-              {{ expandedUrls.has(item.url) ? '▼' : '▶' }}
+              {{ expandedUrls[item.url] ? '▼' : '▶' }}
             </span>
             <a
               :href="item.url"
@@ -246,7 +252,7 @@ function truncateSnippet(text, maxLen = 200) {
           </div>
 
           <!-- 关键词 -->
-          <div v-if="expandedUrls.has(item.url)" class="mt-2">
+          <div v-if="expandedUrls[item.url]" class="mt-2">
             <template v-if="urlKeywords[item.url]?.length">
               <div class="flex flex-wrap gap-1.5">
                 <span