diff --git a/docs/CHANGELOG_web.md b/docs/CHANGELOG_web.md
index 7af61e5..5d7f693 100644
--- a/docs/CHANGELOG_web.md
+++ b/docs/CHANGELOG_web.md
@@ -13,8 +13,8 @@ The format loosely follows Keep a Changelog and can be adapted to the team's hab
 - CBZ reader is now chapter-scoped: a chapter's images flow as one continuous strip and scrolling stops at an 本章完 · 下一章 card (only chapter buttons / TOC / slider / bookmarks cross the boundary); a 连读 toggle makes scrolling flow across chapters, and a configurable 0–3-chapter prefetch pre-mounts upcoming chapters for instant switching — the old 连读/整页/适高 mode cycle is gone.
 - CBZ 阅读器改为以章为单位:一章图片是一段连续长卷,滚动止于「本章完 · 下一章」卡片(跨章只能靠章节按钮/目录/滑条/书签);「连读」开关让滑动贯穿章节,预读 0–3 章可配置、提前挂载解码实现切章零白屏;移除原 连读/整页/适高 三档循环。
 
-- Bookmarks in all four readers: a 书签 button in the bar captures the current position (page / chapter+offset / EPUB CFI) with an optional note; the 书签 tab of the left navigation drawer lists them — click jumps straight back to that spot, ✎ edits the note in place, ✕ deletes. Bookmarks are per-user and server-side, so they follow you across devices.
-- 四类阅读器新增书签：工具条「书签」按钮把当前位置（页码/章节+章内偏移/EPUB CFI）连同可选备注存下；左侧导航抽屉的「书签」选项卡内点一下即跳回原位，✎ 行内改备注，✕ 删除。书签按用户存在服务端，换设备同账号即见。
+- Bookmarks in all four readers: in the 书签 tab of the left navigation drawer, 加 captures the current position (page / chapter+offset / EPUB CFI) with an optional note; clicking a row jumps straight back to that spot, ✎ edits the note in place, ✕ deletes. Bookmarks are per-user and server-side, so they follow you across devices.
+- 四类阅读器新增书签：在左侧导航抽屉的「书签」选项卡内点「加」把当前位置（页码/章节+章内偏移/EPUB CFI）连同可选备注存下；点条目即跳回原位，✎ 行内改备注，✕ 删除。书签按用户存在服务端，换设备同账号即见。
 
 - Folder-structured comics gain a 目录 tab in the CBZ reader's navigation drawer: each archive folder (第N話…) becomes a chapter that jumps to its first page, with 上一章/下一章 buttons, a current-chapter counter, and the active row highlighted and scrolled into view — flat archives show no extra UI.
 - 按目录组织的漫画在 CBZ 阅读器导航抽屉内新增「目录」选项卡：压缩包内每个文件夹（第N話…）即一章，点击直达该话首页；工具条配上一章/下一章与当前章计数，目录内高亮当前章并自动居中；平铺无目录的包不显示多余控件。
@@ -31,8 +31,8 @@ The format loosely follows Keep a Changelog and can be adapted to the team's hab
 
 ### Changed / 变更
 
-- Reader navigation tightened into one left-side drawer: 目录 and 书签 are now tabs of a single sidebar shared by all four readers, following the reader theme's colors (books without a TOC — flat archives, EPUB, PDF — show the bookmarks panel alone); the separate right-side bookmark panel and the per-reader TOC popovers are gone.
-- 阅读器导航收紧为统一左侧抽屉：目录与书签成为四个阅读器共用的同一侧边栏内的两个选项卡，配色跟随阅读器主题（无目录的书——平铺包、EPUB、PDF——仅显示书签面板）；原右侧书签面板与各阅读器自绘目录浮层移除。
+- Reader navigation tightened into one left-side drawer opened by a single 导航 toolbar button: 目录 and 书签 are now tabs of a sidebar shared by all four readers, following the reader theme's colors; the button lands on 目录 when a TOC exists, otherwise straight on bookmarks (flat archives, EPUB, PDF show no tab bar); the separate right-side bookmark panel and the per-reader TOC popovers are gone.
+- 阅读器导航收紧为统一左侧抽屉，工具条只留一个「导航」按钮：目录与书签成为四个阅读器共用侧边栏内的两个选项卡，配色跟随阅读器主题；有目录时默认落在「目录」，否则直达书签（平铺包、EPUB、PDF 不显示选项卡条）；原右侧书签面板与各阅读器自绘目录浮层移除。
 
 - The web UI was rebuilt on a shadcn/Radix design system: semantic light/dark theme tokens with a system/light/dark switcher (remembered), a persistent app shell (desktop sidebar, tablet icon rail, mobile bottom tabs), a shelf driven by URL-state search/sort/group controls with a flat-first grid and menu-based card actions (confirm dialogs replace native popups), and rebuilt login/admin pages. Readers keep their current chrome and every reading interaction this round; their restyle lands next.
 - 网页 UI 以 shadcn/Radix 设计系统重做:语义化明暗主题 token + 系统/浅色/深色切换(记忆);常驻应用壳(桌面侧栏、平板图标栏、手机底部标签);书架改为 URL 状态驱动的搜索/排序/分组工具条,默认平铺网格,卡片操作收进菜单(删除改为对话框确认);登录页与 admin 两页同步重做。阅读器保持现状,改版随下一期到达。
diff --git a/frontend/src/readers/CbzReader.tsx b/frontend/src/readers/CbzReader.tsx
index f7ebd3e..4118368 100644
--- a/frontend/src/readers/CbzReader.tsx
+++ b/frontend/src/readers/CbzReader.tsx
@@ -360,22 +360,14 @@ export default function CbzReader({ book, initialLocator, initialPercent, chrome
             )}
             <button
               className="rd-btn"
-              aria-expanded={nav === "bm"}
+              aria-expanded={!!nav}
               aria-controls="reader-nav"
-              onClick={() => setNav(nav === "bm" ? null : "bm")}
+              onClick={() => setNav(nav ? null : chapters ? "toc" : "bm")}
             >
-              书签
+              导航
             </button>
             {chapters && (
               <>
-                <button
-                  className="rd-btn"
-                  aria-expanded={nav === "toc"}
-                  aria-controls="reader-nav"
-                  onClick={() => setNav(nav === "toc" ? null : "toc")}
-                >
-                  目录
-                </button>
                 <span className="text-xs tabular-nums opacity-60">
                   {ci + 1}/{chapters.length}
                 </span>
diff --git a/frontend/src/readers/EpubReader.tsx b/frontend/src/readers/EpubReader.tsx
index 8e498ab..3561a0f 100644
--- a/frontend/src/readers/EpubReader.tsx
+++ b/frontend/src/readers/EpubReader.tsx
@@ -107,7 +107,7 @@ export default function EpubReader({ book, initialLocator, initialPercent }: Rea
           下一页
         </button>
         <button className="rd-btn" aria-expanded={nav} aria-controls="reader-nav" onClick={() => setNav((v) => !v)}>
-          书签
+          导航
         </button>
       </div>
       {nav && (
diff --git a/frontend/src/readers/PdfReader.tsx b/frontend/src/readers/PdfReader.tsx
index a3904e1..847d21c 100644
--- a/frontend/src/readers/PdfReader.tsx
+++ b/frontend/src/readers/PdfReader.tsx
@@ -155,7 +155,7 @@ export default function PdfReader({ book, initialLocator, initialPercent }: Read
           末页
         </button>
         <button className="rd-btn" aria-expanded={nav} aria-controls="reader-nav" onClick={() => setNav((v) => !v)}>
-          书签
+          导航
         </button>
       </div>
       {nav && (
diff --git a/frontend/src/readers/TextReader.tsx b/frontend/src/readers/TextReader.tsx
index 569e17a..d1fb1e3 100644
--- a/frontend/src/readers/TextReader.tsx
+++ b/frontend/src/readers/TextReader.tsx
@@ -192,7 +192,7 @@ function MdView({ book, initialLocator, initialPercent, chrome }: ReaderProps) {
             aria-controls="reader-nav"
             onClick={() => setNav((v) => !v)}
           >
-            书签
+            导航
           </button>
         </ReaderSheet>
       )}
@@ -311,22 +311,14 @@ function TxtView({ book, initialLocator, initialPercent, chrome }: ReaderProps)
         <ReaderSheet pr={pr} frac={total} onSeek={seek}>
           <button
             className="rd-btn"
-            aria-expanded={nav === "bm"}
+            aria-expanded={!!nav}
             aria-controls="reader-nav"
-            onClick={() => setNav(nav === "bm" ? null : "bm")}
+            onClick={() => setNav(nav ? null : chapters.length > 1 ? "toc" : "bm")}
           >
-            书签
+            导航
           </button>
           {chapters.length > 1 && (
             <>
-              <button
-                className="rd-btn"
-                aria-expanded={nav === "toc"}
-                aria-controls="reader-nav"
-                onClick={() => setNav(nav === "toc" ? null : "toc")}
-              >
-                目录
-              </button>
               <span className="text-xs opacity-60 tabular-nums">
                 {ci + 1}/{chapters.length}
               </span>