diff --git a/package.json b/package.json
index 9422da1..a4f0ae0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "marklite",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "Lightweight Markdown Editor for Windows",
   "main": "./dist/main/index.js",
   "scripts": {
@@ -19,7 +19,7 @@
   "lint-staged": {
     "*.{ts,tsx}": [
       "eslint --fix",
-      "tsc --noEmit --pretty"
+      "bash -c 'tsc --noEmit --pretty --skipLibCheck'"
     ],
     "*.{json,css,md}": [
       "prettier --write"
diff --git a/src/renderer/components/AboutDialog/AboutDialog.tsx b/src/renderer/components/AboutDialog/AboutDialog.tsx
index 9e99fd4..22ebdf0 100644
--- a/src/renderer/components/AboutDialog/AboutDialog.tsx
+++ b/src/renderer/components/AboutDialog/AboutDialog.tsx
@@ -1,7 +1,7 @@
 import React from 'react'
 import { AppIcon, Gitee } from '../Icons'
 
-const APP_VERSION = 'v0.2.0'
+const APP_VERSION = 'v0.3.1'
 
 interface AboutDialogProps {
   onClose: () => void
diff --git a/src/renderer/components/Editor/Editor.tsx b/src/renderer/components/Editor/Editor.tsx
index de448fe..bd59e12 100644
--- a/src/renderer/components/Editor/Editor.tsx
+++ b/src/renderer/components/Editor/Editor.tsx
@@ -1,9 +1,10 @@
-import React, { useEffect, useCallback } from 'react'
+import React, { useEffect, useCallback, useState } from 'react'
 import { callCommand } from '@milkdown/utils'
 import { toggleStrongCommand, toggleEmphasisCommand } from '@milkdown/preset-commonmark'
 import { useTabStore } from '../../stores/tabStore'
 import { useMilkdown } from './useMilkdown'
 import { EditorToolbar } from './EditorToolbar'
+import { SearchReplace } from '../SearchReplace'
 
 interface EditorProps {
   darkMode: boolean
@@ -15,6 +16,7 @@ export function Editor({ darkMode }: EditorProps) {
   const updateTabContent = useTabStore(s => s.updateTabContent)
   const setModified = useTabStore(s => s.setModified)
   const updateTabScroll = useTabStore(s => s.updateTabScroll)
+  const [showSearch, setShowSearch] = useState(false)
 
   const {
     containerRef,
@@ -58,7 +60,7 @@ export function Editor({ darkMode }: EditorProps) {
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [activeTabId])
 
-  // Ctrl+B bold, Ctrl+I italic
+  // Ctrl+B bold, Ctrl+I italic, Ctrl+F search, Ctrl+H replace
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
       const isCtrl = e.ctrlKey || e.metaKey
@@ -74,14 +76,29 @@ export function Editor({ darkMode }: EditorProps) {
           editor.action(callCommand(toggleEmphasisCommand.key))
         })
       }
+      if (isCtrl && (e.key === 'f' || e.key === 'h')) {
+        e.preventDefault()
+        setShowSearch(true)
+      }
     }
     document.addEventListener('keydown', handleKeyDown)
     return () => document.removeEventListener('keydown', handleKeyDown)
   }, [action])
 
+  // 获取编辑器容器 DOM（用于搜索高亮）
+  const getEditorContainer = useCallback((): HTMLDivElement | null => {
+    return containerRef.current
+  }, [containerRef])
+
   return (
     <div className="editor-container" role="region" aria-label="Markdown编辑器">
       <EditorToolbar action={action} />
+      {showSearch && (
+        <SearchReplace
+          editorContainer={getEditorContainer()}
+          onClose={() => setShowSearch(false)}
+        />
+      )}
       <div ref={containerRef} className="milkdown-wrapper" />
     </div>
   )
diff --git a/src/renderer/components/SearchReplace/SearchReplace.tsx b/src/renderer/components/SearchReplace/SearchReplace.tsx
new file mode 100644
index 0000000..4b93d76
--- /dev/null
+++ b/src/renderer/components/SearchReplace/SearchReplace.tsx
@@ -0,0 +1,375 @@
+import React, { useState, useCallback, useRef, useEffect, memo } from 'react'
+
+interface SearchReplaceProps {
+  /** 获取 Milkdown 编辑器容器 DOM（用于遍历文本节点） */
+  editorContainer: HTMLDivElement | null
+  /** 关闭面板 */
+  onClose: () => void
+}
+
+const HIGHLIGHT_CLASS = 'search-match-highlight'
+const ACTIVE_HIGHLIGHT_CLASS = 'search-match-active'
+
+/**
+ * 清除所有搜索高亮
+ */
+function clearHighlights(root: HTMLElement) {
+  const highlighted = root.querySelectorAll(`.${HIGHLIGHT_CLASS}, .${ACTIVE_HIGHLIGHT_CLASS}`)
+  highlighted.forEach(el => {
+    const parent = el.parentNode
+    if (!parent) return
+    while (el.firstChild) parent.insertBefore(el.firstChild, el)
+    parent.removeChild(el)
+  })
+  // 合并相邻文本节点
+  root.normalize()
+}
+
+/**
+ * 高亮所有匹配项
+ * 返回高亮后的元素列表（用于导航）
+ */
+function highlightMatches(root: HTMLElement, query: string, caseSensitive: boolean): HTMLElement[] {
+  clearHighlights(root)
+  if (!query) return []
+
+  const matchElements: HTMLElement[] = []
+  const walker = document.createTreeWalker(root, NodeFilter.SHOW_TEXT, null)
+  const normalizedQuery = caseSensitive ? query : query.toLowerCase()
+
+  const textNodes: Text[] = []
+  let node: Node | null
+  while ((node = walker.nextNode())) {
+    textNodes.push(node as Text)
+  }
+
+  // 从后往前处理，避免偏移量变化
+  for (let i = textNodes.length - 1; i >= 0; i--) {
+    const textNode = textNodes[i]
+    const text = textNode.textContent || ''
+    const searchText = caseSensitive ? text : text.toLowerCase()
+
+    // 收集该文本节点中的所有匹配位置
+    const positions: number[] = []
+    let offset = 0
+    let idx: number
+    while ((idx = searchText.indexOf(normalizedQuery, offset)) !== -1) {
+      positions.push(idx)
+      offset = idx + 1
+    }
+
+    if (positions.length === 0) continue
+
+    // 从后往前拆分文本节点并插入高亮
+    const parent = textNode.parentNode
+    if (!parent) continue
+
+    for (let j = positions.length - 1; j >= 0; j--) {
+      const pos = positions[j]
+      const afterText = text.substring(pos + query.length)
+      const matchText = text.substring(pos, pos + query.length)
+      const beforeText = text.substring(0, pos)
+
+      // 移除原始文本节点
+      if (j === positions.length - 1) {
+        parent.removeChild(textNode)
+      }
+
+      // 插入后续文本
+      if (afterText) {
+        parent.insertBefore(document.createTextNode(afterText), parent.children[0] || null)
+      }
+
+      // 插入高亮标记
+      const mark = document.createElement('mark')
+      mark.className = HIGHLIGHT_CLASS
+      mark.textContent = matchText
+      mark.setAttribute('data-match-index', String(matchElements.length))
+      parent.insertBefore(mark, parent.children[0] || null)
+      matchElements.unshift(mark)
+
+      // 插入前面文本（仅第一个匹配时）
+      if (j === 0 && beforeText) {
+        parent.insertBefore(document.createTextNode(beforeText), parent.children[0] || null)
+      }
+    }
+  }
+
+  return matchElements
+}
+
+/**
+ * SearchReplace — 编辑器内搜索/替换面板
+ *
+ * 功能:
+ * - Ctrl+F 打开搜索，Ctrl+H 打开替换
+ * - 大小写敏感切换
+ * - Enter 下一个，Shift+Enter 上一个
+ * - 替换当前匹配 / 全部替换
+ * - ESC 关闭面板
+ */
+export const SearchReplace = memo(function SearchReplace({
+  editorContainer,
+  onClose
+}: SearchReplaceProps) {
+  const [query, setQuery] = useState('')
+  const [replacement, setReplacement] = useState('')
+  const [showReplace, setShowReplace] = useState(false)
+  const [caseSensitive, setCaseSensitive] = useState(false)
+  const [matchCount, setMatchCount] = useState(0)
+  const [currentMatch, setCurrentMatch] = useState(-1)
+
+  const searchInputRef = useRef<HTMLInputElement>(null)
+  const matchElementsRef = useRef<HTMLElement[]>([])
+  const panelRef = useRef<HTMLDivElement>(null)
+
+  // 执行搜索
+  const doSearch = useCallback((searchQuery: string, cs: boolean) => {
+    if (!editorContainer) return
+
+    if (!searchQuery.trim()) {
+      clearHighlights(editorContainer)
+      matchElementsRef.current = []
+      setMatchCount(0)
+      setCurrentMatch(-1)
+      return
+    }
+
+    const elements = highlightMatches(editorContainer, searchQuery, cs)
+    matchElementsRef.current = elements
+    setMatchCount(elements.length)
+
+    if (elements.length > 0) {
+      setCurrentMatch(0)
+      elements[0].classList.add(ACTIVE_HIGHLIGHT_CLASS)
+      elements[0].scrollIntoView({ behavior: 'smooth', block: 'center' })
+    } else {
+      setCurrentMatch(-1)
+    }
+  }, [editorContainer])
+
+  // 搜索框输入变化
+  const handleQueryChange = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+    const value = e.target.value
+    setQuery(value)
+    doSearch(value, caseSensitive)
+  }, [doSearch, caseSensitive])
+
+  // 大小写切换
+  const toggleCaseSensitive = useCallback(() => {
+    const newCS = !caseSensitive
+    setCaseSensitive(newCS)
+    doSearch(query, newCS)
+  }, [caseSensitive, query, doSearch])
+
+  // 导航到下一个/上一个匹配
+  const navigateMatch = useCallback((direction: 1 | -1) => {
+    const elements = matchElementsRef.current
+    if (elements.length === 0) return
+
+    // 移除当前高亮
+    if (currentMatch >= 0 && currentMatch < elements.length) {
+      elements[currentMatch].classList.remove(ACTIVE_HIGHLIGHT_CLASS)
+    }
+
+    let next = currentMatch + direction
+    if (next >= elements.length) next = 0
+    if (next < 0) next = elements.length - 1
+
+    setCurrentMatch(next)
+    elements[next].classList.add(ACTIVE_HIGHLIGHT_CLASS)
+    elements[next].scrollIntoView({ behavior: 'smooth', block: 'center' })
+  }, [currentMatch])
+
+  // 替换当前匹配
+  const replaceCurrent = useCallback(() => {
+    if (currentMatch < 0 || !editorContainer) return
+
+    const elements = matchElementsRef.current
+    const el = elements[currentMatch]
+    if (!el || !el.parentNode) return
+
+    // 替换文本
+    const textNode = document.createTextNode(replacement)
+    el.parentNode.replaceChild(textNode, el)
+    editorContainer.normalize()
+
+    // 重新搜索
+    doSearch(query, caseSensitive)
+  }, [currentMatch, replacement, editorContainer, query, caseSensitive, doSearch])
+
+  // 全部替换
+  const replaceAll = useCallback(() => {
+    if (!editorContainer || matchCount === 0) return
+
+    const elements = [...matchElementsRef.current]
+    elements.forEach(el => {
+      if (el.parentNode) {
+        el.parentNode.replaceChild(document.createTextNode(replacement), el)
+      }
+    })
+    editorContainer.normalize()
+
+    doSearch(query, caseSensitive)
+  }, [editorContainer, matchCount, replacement, query, caseSensitive, doSearch])
+
+  // 键盘事件
+  const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
+    if (e.key === 'Escape') {
+      e.preventDefault()
+      if (editorContainer) clearHighlights(editorContainer)
+      onClose()
+      return
+    }
+    if (e.key === 'Enter') {
+      e.preventDefault()
+      if (e.shiftKey) {
+        navigateMatch(-1)
+      } else {
+        navigateMatch(1)
+      }
+    }
+  }, [onClose, navigateMatch, editorContainer])
+
+  // 全局 Ctrl+F / Ctrl+H 拦截
+  useEffect(() => {
+    const handleGlobalKey = (e: KeyboardEvent) => {
+      const isCtrl = e.ctrlKey || e.metaKey
+      if (isCtrl && e.key === 'f') {
+        e.preventDefault()
+        setShowReplace(false)
+        searchInputRef.current?.focus()
+        searchInputRef.current?.select()
+      }
+      if (isCtrl && e.key === 'h') {
+        e.preventDefault()
+        setShowReplace(true)
+        searchInputRef.current?.focus()
+        searchInputRef.current?.select()
+      }
+    }
+    document.addEventListener('keydown', handleGlobalKey)
+    return () => document.removeEventListener('keydown', handleGlobalKey)
+  }, [])
+
+  // 打开时聚焦搜索框
+  useEffect(() => {
+    searchInputRef.current?.focus()
+    searchInputRef.current?.select()
+  }, [])
+
+  // 清理高亮
+  useEffect(() => {
+    return () => {
+      if (editorContainer) clearHighlights(editorContainer)
+    }
+  }, [editorContainer])
+
+  return (
+    <div
+      ref={panelRef}
+      className="search-replace-panel"
+      role="search"
+      aria-label="搜索和替换"
+      onKeyDown={handleKeyDown}
+    >
+      <div className="search-row">
+        <div className="search-input-group">
+          <input
+            ref={searchInputRef}
+            type="text"
+            className="search-input"
+            placeholder="搜索..."
+            value={query}
+            onChange={handleQueryChange}
+            aria-label="搜索文本"
+          />
+          <span className="search-count" aria-live="polite">
+            {matchCount > 0 ? `${currentMatch + 1}/${matchCount}` : query ? '无匹配' : ''}
+          </span>
+        </div>
+        <button
+          className={`search-btn ${caseSensitive ? 'active' : ''}`}
+          onClick={toggleCaseSensitive}
+          title="区分大小写 (点击切换)"
+          aria-label="区分大小写"
+          aria-pressed={caseSensitive}
+        >
+          Aa
+        </button>
+        <button
+          className="search-btn"
+          onClick={() => navigateMatch(-1)}
+          title="上一个 (Shift+Enter)"
+          aria-label="上一个匹配"
+          disabled={matchCount === 0}
+        >
+          ↑
+        </button>
+        <button
+          className="search-btn"
+          onClick={() => navigateMatch(1)}
+          title="下一个 (Enter)"
+          aria-label="下一个匹配"
+          disabled={matchCount === 0}
+        >
+          ↓
+        </button>
+        <button
+          className="search-btn"
+          onClick={() => setShowReplace(!showReplace)}
+          title="切换替换模式 (Ctrl+H)"
+          aria-label="替换模式"
+          aria-expanded={showReplace}
+        >
+          ⇄
+        </button>
+        <button
+          className="search-btn search-close"
+          onClick={() => {
+            if (editorContainer) clearHighlights(editorContainer)
+            onClose()
+          }}
+          title="关闭 (Esc)"
+          aria-label="关闭搜索"
+        >
+          ✕
+        </button>
+      </div>
+      {showReplace && (
+        <div className="search-row">
+          <div className="search-input-group">
+            <input
+              type="text"
+              className="search-input"
+              placeholder="替换..."
+              value={replacement}
+              onChange={e => setReplacement(e.target.value)}
+              aria-label="替换文本"
+            />
+          </div>
+          <button
+            className="search-btn replace-btn"
+            onClick={replaceCurrent}
+            title="替换当前"
+            aria-label="替换当前匹配"
+            disabled={currentMatch < 0}
+          >
+            替换
+          </button>
+          <button
+            className="search-btn replace-btn"
+            onClick={replaceAll}
+            title="全部替换"
+            aria-label="替换全部匹配"
+            disabled={matchCount === 0}
+          >
+            全部
+          </button>
+        </div>
+      )}
+    </div>
+  )
+})
+
+SearchReplace.displayName = 'SearchReplace'
diff --git a/src/renderer/components/SearchReplace/index.ts b/src/renderer/components/SearchReplace/index.ts
new file mode 100644
index 0000000..ca2683a
--- /dev/null
+++ b/src/renderer/components/SearchReplace/index.ts
@@ -0,0 +1 @@
+export { SearchReplace } from './SearchReplace'
diff --git a/src/renderer/stores/__tests__/tabStore.test.ts b/src/renderer/stores/__tests__/tabStore.test.ts
index d83e673..46448d4 100644
--- a/src/renderer/stores/__tests__/tabStore.test.ts
+++ b/src/renderer/stores/__tests__/tabStore.test.ts
@@ -52,14 +52,13 @@ describe('tabStore', () => {
     })
 
     it('should switch to existing tab if same filePath is opened', () => {
-      const { createTab } = useTabStore.getState()
-      createTab('/test.md', '# First')
+      useTabStore.getState().createTab('/test.md', '# First')
 
       // Create another tab to make it active
-      createTab('/other.md', '# Other')
+      useTabStore.getState().createTab('/other.md', '# Other')
 
       // Now try to open the first file again
-      const existing = createTab('/test.md', '# Updated')
+      const existing = useTabStore.getState().createTab('/test.md', '# Updated')
       const state = useTabStore.getState()
 
       expect(state.tabs).toHaveLength(2)
diff --git a/src/renderer/styles/global.css b/src/renderer/styles/global.css
index 1300775..a4a3b12 100644
--- a/src/renderer/styles/global.css
+++ b/src/renderer/styles/global.css
@@ -4,7 +4,8 @@
   box-sizing: border-box;
 }
 
-html, body {
+html,
+body {
   height: 100%;
   font-family: var(--font-ui);
   font-size: 14px;
@@ -33,7 +34,8 @@ html, body {
   z-index: 10;
 }
 
-.toolbar-left, .toolbar-right {
+.toolbar-left,
+.toolbar-right {
   display: flex;
   align-items: center;
   gap: 2px;
@@ -65,7 +67,9 @@ html, body {
   color: var(--primary);
 }
 
-.toolbar-btn svg { flex-shrink: 0; }
+.toolbar-btn svg {
+  flex-shrink: 0;
+}
 
 .toolbar-divider {
   width: 1px;
@@ -129,7 +133,9 @@ html, body {
   overflow-x: auto;
 }
 
-.editor-toolbar::-webkit-scrollbar { height: 0; }
+.editor-toolbar::-webkit-scrollbar {
+  height: 0;
+}
 
 .toolbar-btn-sm {
   display: flex;
@@ -203,9 +209,15 @@ html, body {
   color: var(--text);
 }
 
-.milkdown-wrapper .milkdown .editor h1 { font-size: 1.6em; }
-.milkdown-wrapper .milkdown .editor h2 { font-size: 1.4em; }
-.milkdown-wrapper .milkdown .editor h3 { font-size: 1.2em; }
+.milkdown-wrapper .milkdown .editor h1 {
+  font-size: 1.6em;
+}
+.milkdown-wrapper .milkdown .editor h2 {
+  font-size: 1.4em;
+}
+.milkdown-wrapper .milkdown .editor h3 {
+  font-size: 1.2em;
+}
 
 .milkdown-wrapper .milkdown .editor blockquote {
   border-left: 3px solid var(--primary);
@@ -420,7 +432,9 @@ html, body {
 
 .tab-item:hover .tab-close,
 .tab-item.active .tab-close,
-.tab-item.modified .tab-close { opacity: 1; }
+.tab-item.modified .tab-close {
+  opacity: 1;
+}
 
 .tab-close:hover {
   background: var(--border);
@@ -541,13 +555,16 @@ html, body {
   flex-shrink: 0;
 }
 
-.status-left, .status-right {
+.status-left,
+.status-right {
   display: flex;
   align-items: center;
   gap: 8px;
 }
 
-.status-divider { color: var(--border); }
+.status-divider {
+  color: var(--border);
+}
 
 /* Drop Overlay */
 #drop-overlay {
@@ -603,7 +620,9 @@ html, body {
   animation: fadeIn 0.3s ease;
 }
 
-.welcome-icon { margin-bottom: 24px; }
+.welcome-icon {
+  margin-bottom: 24px;
+}
 
 .welcome-content h1 {
   font-size: 28px;
@@ -655,7 +674,9 @@ html, body {
   border: 1px solid var(--border);
 }
 
-.welcome-btn.secondary:hover { background: var(--bg-tertiary); }
+.welcome-btn.secondary:hover {
+  background: var(--bg-tertiary);
+}
 
 /* 最近打开文件 */
 .welcome-recent {
@@ -698,7 +719,9 @@ html, body {
   border-bottom: 1px solid var(--border-light);
 }
 
-.recent-item:last-child { border-bottom: none; }
+.recent-item:last-child {
+  border-bottom: none;
+}
 
 .recent-item:hover {
   background: var(--bg-tertiary);
@@ -737,7 +760,9 @@ html, body {
   margin-bottom: 6px;
 }
 
-.welcome-tips p:last-child { margin-bottom: 0; }
+.welcome-tips p:last-child {
+  margin-bottom: 0;
+}
 
 /* Sidebar */
 #sidebar {
@@ -754,7 +779,9 @@ html, body {
   position: relative;
 }
 
-#sidebar.collapsed { display: none; }
+#sidebar.collapsed {
+  display: none;
+}
 
 #sidebar-header {
   display: flex;
@@ -811,7 +838,9 @@ html, body {
   border-radius: 0;
 }
 
-.tree-item:hover { background: var(--sidebar-hover); }
+.tree-item:hover {
+  background: var(--sidebar-hover);
+}
 
 .tree-item.active {
   background: var(--sidebar-active);
@@ -819,7 +848,9 @@ html, body {
   font-weight: 500;
 }
 
-.tree-indent { flex-shrink: 0; }
+.tree-indent {
+  flex-shrink: 0;
+}
 
 .tree-arrow {
   display: flex;
@@ -832,7 +863,9 @@ html, body {
   transition: transform 0.15s ease;
 }
 
-.tree-arrow.expanded { transform: rotate(90deg); }
+.tree-arrow.expanded {
+  transform: rotate(90deg);
+}
 
 .tree-icon {
   display: flex;
@@ -844,7 +877,10 @@ html, body {
   margin-right: 4px;
 }
 
-.tree-icon svg { width: 14px; height: 14px; }
+.tree-icon svg {
+  width: 14px;
+  height: 14px;
+}
 
 .tree-name {
   overflow: hidden;
@@ -858,7 +894,8 @@ html, body {
   padding-bottom: 4px;
 }
 
-.sidebar-section-header, .independent-files-header {
+.sidebar-section-header,
+.independent-files-header {
   font-size: 11px;
   font-weight: 600;
   color: var(--text-tertiary);
@@ -889,8 +926,12 @@ html, body {
 }
 
 /* View Modes */
-#app.mode-preview #editor-panel { display: none; }
-#app.mode-editor #preview-panel { display: none; }
+#app.mode-preview #editor-panel {
+  display: none;
+}
+#app.mode-editor #preview-panel {
+  display: none;
+}
 
 /* Toast */
 #toast-notification {
@@ -907,7 +948,9 @@ html, body {
   box-shadow: var(--shadow-lg);
   opacity: 0;
   pointer-events: none;
-  transition: opacity 0.3s ease, transform 0.3s ease;
+  transition:
+    opacity 0.3s ease,
+    transform 0.3s ease;
   z-index: 9999;
   max-width: 480px;
   text-align: center;
@@ -920,15 +963,31 @@ html, body {
 }
 
 /* Scrollbar */
-::-webkit-scrollbar { width: 8px; height: 8px; }
-::-webkit-scrollbar-track { background: transparent; }
-::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
-::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }
+::-webkit-scrollbar {
+  width: 8px;
+  height: 8px;
+}
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+::-webkit-scrollbar-thumb {
+  background: var(--border);
+  border-radius: 4px;
+}
+::-webkit-scrollbar-thumb:hover {
+  background: var(--text-tertiary);
+}
 
 /* Animations */
 @keyframes fadeIn {
-  from { opacity: 0; transform: translateY(8px); }
-  to { opacity: 1; transform: translateY(0); }
+  from {
+    opacity: 0;
+    transform: translateY(8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
 }
 
 /* About Dialog */
@@ -1094,9 +1153,15 @@ html, body {
   margin: 0;
 }
 
-.confirm-header.confirm-danger h3 { color: #d93025; }
-.confirm-header.confirm-warning h3 { color: #e37400; }
-:root.dark .confirm-header.confirm-warning h3 { color: #fdd663; }
+.confirm-header.confirm-danger h3 {
+  color: #d93025;
+}
+.confirm-header.confirm-warning h3 {
+  color: #e37400;
+}
+:root.dark .confirm-header.confirm-warning h3 {
+  color: #fdd663;
+}
 
 .confirm-body {
   padding: 12px 24px 20px;
@@ -1212,8 +1277,12 @@ html, body {
 }
 
 @keyframes spin {
-  from { transform: rotate(0deg); }
-  to { transform: rotate(360deg); }
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
 }
 
 /* Status bar loading indicator */
@@ -1365,9 +1434,9 @@ html, body {
 
 /* Focus visible 为所有交互元素提供清晰的焦点指示 */
 button:focus-visible,
-[role="treeitem"]:focus-visible,
-[role="tab"]:focus-visible,
-[role="menuitem"]:focus-visible {
+[role='treeitem']:focus-visible,
+[role='tab']:focus-visible,
+[role='menuitem']:focus-visible {
   outline: 2px solid var(--primary);
   outline-offset: 2px;
 }
@@ -1396,3 +1465,138 @@ button:focus-visible,
   white-space: nowrap;
   border: 0;
 }
+
+/* ===== Search & Replace Panel ===== */
+
+.search-replace-panel {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  padding: 8px 12px;
+  background: var(--bg-secondary);
+  border-bottom: 1px solid var(--border);
+  flex-shrink: 0;
+  animation: slideDown 0.15s ease-out;
+}
+
+@keyframes slideDown {
+  from {
+    transform: translateY(-100%);
+    opacity: 0;
+  }
+  to {
+    transform: translateY(0);
+    opacity: 1;
+  }
+}
+
+.search-row {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+}
+
+.search-input-group {
+  flex: 1;
+  display: flex;
+  align-items: center;
+  position: relative;
+  min-width: 0;
+}
+
+.search-input {
+  flex: 1;
+  height: 28px;
+  padding: 0 8px;
+  border: 1px solid var(--border);
+  border-radius: 4px;
+  background: var(--bg);
+  color: var(--text);
+  font-size: 12px;
+  font-family: var(--font-ui);
+  outline: none;
+  transition: border-color 0.15s;
+}
+
+.search-input:focus {
+  border-color: var(--primary);
+}
+
+.search-input::placeholder {
+  color: var(--text-tertiary);
+}
+
+.search-count {
+  position: absolute;
+  right: 8px;
+  font-size: 11px;
+  color: var(--text-tertiary);
+  pointer-events: none;
+  white-space: nowrap;
+}
+
+.search-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-width: 28px;
+  height: 28px;
+  padding: 0 6px;
+  border: none;
+  background: transparent;
+  color: var(--text-secondary);
+  font-size: 12px;
+  font-family: var(--font-ui);
+  border-radius: 4px;
+  cursor: pointer;
+  transition: all 0.15s ease;
+  white-space: nowrap;
+}
+
+.search-btn:hover {
+  background: var(--bg-tertiary);
+  color: var(--text);
+}
+
+.search-btn:disabled {
+  opacity: 0.4;
+  cursor: not-allowed;
+}
+
+.search-btn.active {
+  background: var(--primary-light);
+  color: var(--primary);
+}
+
+.search-close:hover {
+  background: #e74c3c20;
+  color: #e74c3c;
+}
+
+.replace-btn {
+  font-size: 11px;
+  padding: 0 8px;
+}
+
+/* Search match highlights */
+mark.search-match-highlight {
+  background: rgba(255, 213, 0, 0.4);
+  color: inherit;
+  border-radius: 2px;
+  padding: 0;
+}
+
+mark.search-match-active {
+  background: rgba(255, 150, 0, 0.6);
+  outline: 1px solid rgba(255, 150, 0, 0.8);
+  border-radius: 2px;
+}
+
+:root.dark mark.search-match-highlight {
+  background: rgba(255, 213, 0, 0.25);
+}
+
+:root.dark mark.search-match-active {
+  background: rgba(255, 180, 0, 0.4);
+  outline-color: rgba(255, 180, 0, 0.6);
+}