diff --git a/demo.html b/demo.html
index 75dbbbc..a36ae4f 100644
--- a/demo.html
+++ b/demo.html
@@ -9,6 +9,19 @@
       .panel { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
       .panel input[type="text"] { width: 420px; padding: 6px 8px; font-size: 12px; }
       .panel button { padding: 6px 12px; font-size: 12px; cursor: pointer; }
+      .layout { display: flex; gap: 12px; align-items: flex-start; }
+      .sidebar { width: 280px; border: 1px solid #e2e6ed; border-radius: 8px; padding: 12px; background: #fafafa; }
+      .sidebar h4 { margin: 0 0 8px; font-weight: 600; font-size: 14px; }
+      .bookmark-form { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
+      .bookmark-form input { flex: 1; min-width: 0; padding: 6px 8px; font-size: 12px; }
+      .bookmark-form input[type="number"] { width: 80px; }
+      .bookmark-form button { padding: 6px 12px; font-size: 12px; cursor: pointer; }
+      .bookmark-list { list-style: none; padding: 0; margin: 0; }
+      .bookmark-item { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px; border-bottom: 1px solid #eee; }
+      .bookmark-item span { font-size: 12px; color: #111827; }
+      .bookmark-actions { display: flex; gap: 6px; }
+      .bookmark-actions button { padding: 4px 8px; font-size: 12px; cursor: pointer; }
+      .editorWrap { flex: 1; }
       iframe { width: 100%; height: 80vh; border: 1px solid #e2e6ed; }
       small { color: #6b7280; }
     </style>
@@ -24,13 +37,27 @@
       <button id="loadBtn">设置 iframe 地址</button>
       <small>示例：vocd.html?filePath=URL&mode=edit 或 vocd.html?filePath=URL</small>
     </div>
-    <iframe id="editorFrame" src="./vocd.html" referrerpolicy="no-referrer"></iframe>
+    <div class="layout">
+      <aside class="sidebar">
+        <h4>书签</h4>
+        <div class="bookmark-form">
+          <button id="addBookmarkBtn">添加书签</button>
+          <small>自动命名为书签N+1，页码取当前可见页</small>
+        </div>
+        <ul id="bookmarkList" class="bookmark-list"></ul>
+      </aside>
+      <div class="editorWrap">
+        <iframe id="editorFrame" src="./vocd.html" referrerpolicy="no-referrer"></iframe>
+      </div>
+    </div>
 
     <script>
       const editorFrame = document.getElementById('editorFrame')
       const loadBtn = document.getElementById('loadBtn')
       const urlInput = document.getElementById('urlInput')
       const editModeToggle = document.getElementById('editModeToggle')
+      const addBookmarkBtn = document.getElementById('addBookmarkBtn')
+      const bookmarkList = document.getElementById('bookmarkList')
 
       function buildSrc(filePath, isEdit) {
         const base = './vocd.html'
@@ -47,6 +74,7 @@
         const src = buildSrc(defaultUrl, editModeToggle.checked)
         editorFrame.src = src
         console.log('[demo] 自动设置 iframe src:', src)
+        renderBookmarks()
       })
 
       // 切换编辑模式时，刷新 iframe 地址，保留当前 filePath
@@ -58,6 +86,7 @@
         const src = buildSrc(currentFilePath, editModeToggle.checked)
         editorFrame.src = src
         console.log('[demo] 编辑模式切换，刷新 iframe src:', src)
+        renderBookmarks()
       })
 
       loadBtn.onclick = () => {
@@ -67,7 +96,145 @@
         const src = buildSrc(targetUrl, editModeToggle.checked)
         editorFrame.src = src
         console.log('[demo] 设置 iframe src:', src)
+        renderBookmarks()
       }
+
+      function getCurrentFilePath() {
+        const currentAbs = editorFrame.src || './vocd.html'
+        const currentUrl = new URL(currentAbs, window.location.href)
+        return currentUrl.searchParams.get('filePath') || '/test.ocd'
+      }
+
+      function getBookmarkKey() {
+        const fp = getCurrentFilePath()
+        return `bookmarks:${fp}`
+      }
+
+      function readBookmarks() {
+        try {
+          const raw = localStorage.getItem(getBookmarkKey())
+          return raw ? JSON.parse(raw) : []
+        } catch {
+          return []
+        }
+      }
+
+      function writeBookmarks(list) {
+        localStorage.setItem(getBookmarkKey(), JSON.stringify(list))
+      }
+
+      function getNextBookmarkName() {
+        const list = readBookmarks()
+        let maxN = 0
+        list.forEach(b => {
+          const m = /^书签(\d+)$/.exec(String(b.name || ''))
+          if (m) {
+            const n = parseInt(m[1], 10)
+            if (Number.isFinite(n)) maxN = Math.max(maxN, n)
+          }
+        })
+        return `书签${maxN + 1}`
+      }
+
+      function renderBookmarks() {
+        const list = readBookmarks()
+        bookmarkList.innerHTML = ''
+        list.forEach(item => {
+          const li = document.createElement('li')
+          li.className = 'bookmark-item'
+          const label = document.createElement('span')
+          label.textContent = `${item.name}（第${item.page}页）`
+          const actions = document.createElement('div')
+          actions.className = 'bookmark-actions'
+          const jumpBtn = document.createElement('button')
+          jumpBtn.textContent = '跳转'
+          jumpBtn.onclick = () => navigateToPage(item.page)
+          const editBtn = document.createElement('button')
+          editBtn.textContent = '编辑'
+          editBtn.onclick = () => {
+            const newName = window.prompt('书签名称', item.name) || item.name
+            const newPageStr = window.prompt('页码（正整数）', String(item.page)) || String(item.page)
+            const newPage = Math.max(1, parseInt(newPageStr, 10) || item.page)
+            const list2 = readBookmarks().map(b => (b.id === item.id ? { ...b, name: newName, page: newPage } : b))
+            writeBookmarks(list2)
+            renderBookmarks()
+          }
+          const delBtn = document.createElement('button')
+          delBtn.textContent = '删除'
+          delBtn.onclick = () => {
+            const list2 = readBookmarks().filter(b => b.id !== item.id)
+            writeBookmarks(list2)
+            renderBookmarks()
+          }
+          actions.appendChild(jumpBtn)
+          actions.appendChild(editBtn)
+          actions.appendChild(delBtn)
+          li.appendChild(label)
+          li.appendChild(actions)
+          bookmarkList.appendChild(li)
+        })
+      }
+
+      function addBookmark(name, page) {
+        const list = readBookmarks()
+        const id = Date.now().toString(36) + Math.random().toString(36).slice(2)
+        const item = { id, name, page }
+        writeBookmarks([...list, item])
+        renderBookmarks()
+      }
+
+      addBookmarkBtn.onclick = () => {
+        const name = getNextBookmarkName()
+        const page = getFirstVisiblePageNo()
+        addBookmark(name, page)
+      }
+
+      function getFirstVisiblePageNo() {
+        const doc = editorFrame.contentDocument || editorFrame.contentWindow?.document
+        if (!doc) return 1
+        const iframeRect = editorFrame.getBoundingClientRect()
+        const canvases = Array.from(doc.querySelectorAll('canvas[data-index]'))
+        if (!canvases.length) return 1
+        const visible = canvases
+          .map(c => {
+            const rect = c.getBoundingClientRect()
+            const overlapY = Math.min(rect.bottom, iframeRect.bottom) - Math.max(rect.top, iframeRect.top)
+            return { c, rect, overlapY }
+          })
+          .filter(x => x.overlapY > 0)
+          .sort((a, b) => a.rect.top - b.rect.top)
+
+        let chosen = visible.length ? visible[0].c : null
+        if (!chosen) {
+          chosen = canvases.sort((a, b) => a.getBoundingClientRect().top - b.getBoundingClientRect().top)[0]
+        }
+        const idxStr = chosen?.getAttribute('data-index') || '0'
+        const idx = parseInt(idxStr, 10)
+        return Number.isFinite(idx) ? idx + 1 : 1
+      }
+
+      function navigateToPage(page) {
+        const doc = editorFrame.contentDocument || editorFrame.contentWindow?.document
+        if (!doc) return
+        const target0 = doc.querySelector(`canvas[data-index="${page - 1}"]`)
+        const target1 = doc.querySelector(`canvas[data-index="${page}"]`)
+        const canvas = target0 || target1
+        if (!canvas) {
+          alert(`未找到第${page}页`)
+          return
+        }
+        try {
+          canvas.scrollIntoView({ behavior: 'smooth', block: 'center' })
+          const evt = new MouseEvent('mousedown', { bubbles: true })
+          canvas.dispatchEvent(evt)
+        } catch (e) {
+          console.warn('跳转页失败', e)
+        }
+      }
+
+      editorFrame.addEventListener('load', () => {
+        renderBookmarks()
+      })
     </script>
   </body>
   </html>