diff --git a/src/composables/useSearchHistory.ts b/src/composables/useSearchHistory.ts
new file mode 100644
index 0000000..6e10fcc
--- /dev/null
+++ b/src/composables/useSearchHistory.ts
@@ -0,0 +1,48 @@
+import { ref, readonly } from 'vue'
+
+const STORAGE_KEY = 'polyclient_search_history'
+const MAX_HISTORY = 10
+
+const history = ref<string[]>([])
+
+function loadHistory() {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    history.value = raw ? JSON.parse(raw) : []
+  } catch {
+    history.value = []
+  }
+}
+
+function saveHistory() {
+  try {
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(history.value))
+  } catch {
+    // ignore
+  }
+}
+
+export function useSearchHistory() {
+  const list = readonly(history)
+
+  function add(keyword: string) {
+    const k = keyword.trim()
+    if (!k) return
+    history.value = [k, ...history.value.filter((h) => h !== k)].slice(0, MAX_HISTORY)
+    saveHistory()
+  }
+
+  function remove(index: number) {
+    history.value = history.value.filter((_, i) => i !== index)
+    saveHistory()
+  }
+
+  function clearAll() {
+    history.value = []
+    saveHistory()
+  }
+
+  loadHistory()
+
+  return { list, add, remove, clearAll }
+}
diff --git a/src/views/Home.vue b/src/views/Home.vue
index 443e3cb..932374a 100644
--- a/src/views/Home.vue
+++ b/src/views/Home.vue
@@ -1,18 +1,90 @@
 <template>
   <div class="home-page">
-    <!-- 第一层：置顶、全宽，始终可见 -->
+    <!-- 第一层：单行紧凑布局，tabs + 搜索/筛选图标 -->
     <div v-if="categoryLayers.length > 0" class="home-category-layer1-wrap">
-      <div class="home-category-layer home-category-layer--text">
+      <div class="home-category-layer1-row">
         <v-tabs
           :model-value="layerActiveValues[0]"
-          class="home-tab-bar"
+          class="home-tab-bar home-tab-bar--inline"
           @update:model-value="onCategorySelect(0, $event)"
         >
           <v-tab v-for="item in categoryLayers[0]" :key="item.id" :value="item.id">
             {{ item.label }}
           </v-tab>
         </v-tabs>
+        <div class="home-category-layer1-actions">
+          <v-btn
+            icon
+            variant="text"
+            size="small"
+            class="home-category-action-btn"
+            aria-label="搜索"
+            @click="expandSearch"
+          >
+            <v-icon size="20">mdi-magnify</v-icon>
+          </v-btn>
+          <v-btn icon variant="text" size="small" class="home-category-action-btn" aria-label="筛选">
+            <v-icon size="20">mdi-filter-outline</v-icon>
+          </v-btn>
+        </div>
       </div>
+      <!-- 搜索展开时：浮层输入框 + 历史记录 -->
+      <transition name="home-search-overlay">
+        <div v-if="searchExpanded" class="home-search-overlay">
+          <div class="home-search-overlay-inner">
+            <v-text-field
+              ref="searchInputRef"
+              v-model="searchKeyword"
+              density="compact"
+              hide-details
+              placeholder="Search"
+              prepend-inner-icon="mdi-magnify"
+              variant="outlined"
+              class="home-search-overlay-field"
+              @blur="onSearchBlur"
+              @keydown.enter="onSearchSubmit"
+            />
+            <v-btn icon variant="text" size="small" class="home-search-close-btn" aria-label="收起" @click="collapseSearch">
+              <v-icon size="18">mdi-close</v-icon>
+            </v-btn>
+          </div>
+          <div v-if="searchHistoryList.length > 0" class="home-search-history">
+            <div class="home-search-history-header">
+              <span class="home-search-history-title">搜索历史</span>
+              <v-btn
+                variant="text"
+                size="x-small"
+                color="primary"
+                class="home-search-history-clear"
+                @click="searchHistory.clearAll"
+              >
+                清空
+              </v-btn>
+            </div>
+            <ul class="home-search-history-list">
+              <li
+                v-for="(item, idx) in searchHistoryList"
+                :key="`${item}-${idx}`"
+                class="home-search-history-item"
+              >
+                <button type="button" class="home-search-history-text" @click="selectHistoryItem(item)">
+                  {{ item }}
+                </button>
+                <v-btn
+                  icon
+                  variant="text"
+                  size="x-small"
+                  class="home-search-history-delete"
+                  aria-label="删除"
+                  @click.stop="searchHistory.remove(idx)"
+                >
+                  <v-icon size="16">mdi-close</v-icon>
+                </v-btn>
+              </li>
+            </ul>
+          </div>
+        </div>
+      </transition>
     </div>
     <v-container fluid class="home-container">
       <!-- 第二三层：随内容滚动，回顶部时与列表第一行一起出现 -->
@@ -34,17 +106,6 @@
           </div>
         </div>
         <div v-if="categoryLayers.length >= 3" class="home-category-layer home-category-layer--third">
-          <div class="home-category-third-header">
-            <h3 class="home-category-third-title">{{ selectedLayer0SectionTitle }}</h3>
-            <div class="home-category-third-actions">
-              <v-btn icon variant="text" size="small" class="home-category-action-btn" aria-label="搜索">
-                <v-icon size="20">mdi-magnify</v-icon>
-              </v-btn>
-              <v-btn icon variant="text" size="small" class="home-category-action-btn" aria-label="筛选">
-                <v-icon size="20">mdi-filter-outline</v-icon>
-              </v-btn>
-            </div>
-          </div>
           <v-tabs
             :model-value="layerActiveValues[2]"
             class="home-tab-bar home-tab-bar--compact"
@@ -227,14 +288,68 @@ import {
   type EventCardItem,
 } from '../api/event'
 import { getCategoryTree, MOCK_CATEGORY_TREE, type CategoryTreeNode } from '../api/category'
+import { useSearchHistory } from '../composables/useSearchHistory'
 
 const { mobile } = useDisplay()
+const searchHistory = useSearchHistory()
+const searchHistoryList = computed(() => searchHistory.list.value)
 const isMobile = computed(() => mobile.value)
 
 /** 分类树（顶层） */
 const categoryTree = ref<CategoryTreeNode[]>([])
 /** 每层选中的 id，[layer0, layer1?, layer2?] */
 const layerActiveValues = ref<string[]>([])
+/** 第三层搜索框是否展开 */
+const searchExpanded = ref(false)
+/** 搜索关键词 */
+const searchKeyword = ref('')
+const searchInputRef = ref<{ focus: () => void } | null>(null)
+
+function expandSearch() {
+  searchExpanded.value = true
+  nextTick(() => {
+    const el = searchInputRef.value as { focus?: () => void } | null
+    el?.focus?.()
+  })
+}
+
+function collapseSearch() {
+  searchExpanded.value = false
+  searchKeyword.value = ''
+  if (activeSearchKeyword.value) {
+    activeSearchKeyword.value = ''
+    clearEventListCache()
+    eventPage.value = 1
+    loadEvents(1, false, '')
+  }
+}
+
+function onSearchBlur() {
+  setTimeout(() => {
+    if (!searchKeyword.value.trim()) searchExpanded.value = false
+  }, 100)
+}
+
+function onSearchSubmit() {
+  const k = searchKeyword.value.trim()
+  if (k) {
+    searchHistory.add(k)
+    doSearch(k)
+  }
+}
+
+function selectHistoryItem(item: string) {
+  searchKeyword.value = item
+  searchHistory.add(item)
+  doSearch(item)
+}
+
+function doSearch(keyword: string) {
+  activeSearchKeyword.value = keyword
+  clearEventListCache()
+  eventPage.value = 1
+  loadEvents(1, false, keyword)
+}
 
 /** 过滤 forceHide 的节点 */
 function filterVisible(nodes: CategoryTreeNode[] | undefined): CategoryTreeNode[] {
@@ -370,11 +485,15 @@ function updateGridColumns() {
   gridColumns.value = Math.max(1, n)
 }
 
+/** 当前生效的搜索关键词（用于分页加载） */
+const activeSearchKeyword = ref('')
+
 /** 请求事件列表并追加或覆盖到 eventList（公开接口，无需鉴权）；成功后会更新内存缓存 */
-async function loadEvents(page: number, append: boolean) {
+async function loadEvents(page: number, append: boolean, keyword?: string) {
+  const kw = keyword !== undefined ? keyword : activeSearchKeyword.value
   try {
     const res = await getPmEventPublic(
-      { page, pageSize: PAGE_SIZE }
+      { page, pageSize: PAGE_SIZE, keyword: kw || undefined }
     )
     if (res.code !== 0 && res.code !== 200) {
       throw new Error(res.msg || '请求失败')
@@ -408,7 +527,7 @@ async function loadEvents(page: number, append: boolean) {
 function onRefresh({ done }: { done: () => void }) {
   clearEventListCache()
   eventPage.value = 1
-  loadEvents(1, false).finally(() => done())
+  loadEvents(1, false, activeSearchKeyword.value).finally(() => done())
 }
 
 function loadMore() {
@@ -623,6 +742,147 @@ onUnmounted(() => {
   box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
 }
 
+.home-category-layer1-row {
+  display: flex;
+  align-items: center;
+  min-height: 48px;
+}
+
+.home-tab-bar--inline {
+  flex: 1;
+  min-width: 0;
+}
+
+.home-tab-bar--inline :deep(.v-tabs) {
+  min-height: 48px;
+}
+
+.home-tab-bar--inline :deep(.v-tab) {
+  min-height: 48px;
+}
+
+.home-category-layer1-actions {
+  display: flex;
+  flex-shrink: 0;
+  gap: 0;
+}
+
+/* 搜索浮层：绝对定位，遮挡第二三层，不顶开布局 */
+.home-search-overlay {
+  position: absolute;
+  top: 100%;
+  left: 0;
+  right: 0;
+  z-index: 11;
+  padding: 8px 12px 12px;
+  background-color: white;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+  border-top: 1px solid rgba(0, 0, 0, 0.06);
+}
+
+.home-search-overlay-inner {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.home-search-overlay-field {
+  flex: 1;
+  min-width: 0;
+  font-size: 14px;
+}
+
+.home-search-close-btn {
+  flex-shrink: 0;
+}
+
+.home-search-overlay-field :deep(.v-field) {
+  background-color: #f8fafc;
+}
+
+.home-search-overlay-enter-active,
+.home-search-overlay-leave-active {
+  transition: opacity 0.15s ease, transform 0.15s ease;
+}
+
+.home-search-overlay-enter-from,
+.home-search-overlay-leave-to {
+  opacity: 0;
+}
+
+.home-search-history {
+  margin-top: 8px;
+  padding-top: 8px;
+  border-top: 1px solid rgba(0, 0, 0, 0.06);
+}
+
+.home-search-history-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 8px;
+}
+
+.home-search-history-title {
+  font-size: 12px;
+  color: #64748b;
+}
+
+.home-search-history-clear {
+  min-width: auto;
+  padding: 0 4px;
+  font-size: 12px;
+}
+
+.home-search-history-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  max-height: 160px;
+  overflow-y: auto;
+}
+
+.home-search-history-item {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 6px 0;
+  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
+}
+
+.home-search-history-item:last-child {
+  border-bottom: none;
+}
+
+.home-search-history-text {
+  flex: 1;
+  min-width: 0;
+  padding: 0;
+  border: none;
+  background: none;
+  font-size: 14px;
+  color: #1e293b;
+  text-align: left;
+  cursor: pointer;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.home-search-history-text:hover {
+  color: rgb(var(--v-theme-primary));
+}
+
+.home-search-history-delete {
+  flex-shrink: 0;
+  min-width: 28px;
+  color: #94a3b8;
+}
+
+.home-search-history-delete:hover {
+  color: #ef4444;
+}
+
 /* 第二三层：随内容滚动，全宽 */
 .home-category-layers-23-scroll {
   width: 100vw;
@@ -707,25 +967,6 @@ onUnmounted(() => {
   padding: 12px 16px 0;
 }
 
-.home-category-third-header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  margin-bottom: 12px;
-}
-
-.home-category-third-title {
-  font-size: 16px;
-  font-weight: 600;
-  margin: 0;
-  color: #1e293b;
-}
-
-.home-category-third-actions {
-  display: flex;
-  gap: 4px;
-}
-
 .home-category-action-btn {
   min-width: 36px;
 }