diff --git a/apps/readest-app/public/locales/de/translation.json b/apps/readest-app/public/locales/de/translation.json
index 6c74113a..0e485100 100644
--- a/apps/readest-app/public/locales/de/translation.json
+++ b/apps/readest-app/public/locales/de/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Sprechen",
   "Subjects:": "Themen:",
   "System Fonts": "System-Schriftarten",
+  "Table of Contents": "Inhaltsverzeichnis",
   "TTS not supported in this device": "TTS wird auf diesem Gerät nicht unterstützt",
   "Theme Color": "Themenfarbe",
   "Theme Mode": "Themenmodus",
diff --git a/apps/readest-app/public/locales/es/translation.json b/apps/readest-app/public/locales/es/translation.json
index 56ec1956..1a0794bd 100644
--- a/apps/readest-app/public/locales/es/translation.json
+++ b/apps/readest-app/public/locales/es/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Leer",
   "Subjects:": "Temas:",
   "System Fonts": "Fuentes del sistema",
+  "Table of Contents": "Tabla de contenidos",
   "TTS not supported in this device": "TTS no es compatible con este dispositivo",
   "Theme Color": "Color del tema",
   "Theme Mode": "Modo del tema",
@@ -129,4 +130,4 @@
   "Wikipedia": "Wikipedia",
   "Writing Mode": "Modo de escritura",
   "Your Library": "Tu biblioteca"
-}
+}
\ No newline at end of file
diff --git a/apps/readest-app/public/locales/fr/translation.json b/apps/readest-app/public/locales/fr/translation.json
index e87e9562..35330191 100644
--- a/apps/readest-app/public/locales/fr/translation.json
+++ b/apps/readest-app/public/locales/fr/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Lire",
   "Subjects:": "Sujets :",
   "System Fonts": "Polices système",
+  "Table of Contents": "Table des matières",
   "TTS not supported in this device": "La synthèse vocale n'est pas prise en charge sur cet appareil",
   "Theme Color": "Couleur du thème",
   "Theme Mode": "Mode du thème",
diff --git a/apps/readest-app/public/locales/id/translation.json b/apps/readest-app/public/locales/id/translation.json
index 180c6358..b4757a18 100644
--- a/apps/readest-app/public/locales/id/translation.json
+++ b/apps/readest-app/public/locales/id/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Bicara",
   "Subjects:": "Subjek:",
   "System Fonts": "Font Sistem",
+  "Table of Contents": "Daftar Isi",
   "TTS not supported in this device": "TTS tidak didukung di perangkat ini",
   "Theme Color": "Warna Tema",
   "Theme Mode": "Mode Tema",
diff --git a/apps/readest-app/public/locales/it/translation.json b/apps/readest-app/public/locales/it/translation.json
index 49771fce..0d8e86a7 100644
--- a/apps/readest-app/public/locales/it/translation.json
+++ b/apps/readest-app/public/locales/it/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Leggi",
   "Subjects:": "Argomenti:",
   "System Fonts": "Font di sistema",
+  "Table of Contents": "Indice",
   "TTS not supported in this device": "TTS non supportato su questo dispositivo",
   "Theme Color": "Colore tema",
   "Theme Mode": "Modalità tema",
diff --git a/apps/readest-app/public/locales/ja/translation.json b/apps/readest-app/public/locales/ja/translation.json
index 0b48c358..26cadd2a 100644
--- a/apps/readest-app/public/locales/ja/translation.json
+++ b/apps/readest-app/public/locales/ja/translation.json
@@ -114,6 +114,7 @@
   "Speak": "読み上げ",
   "Subjects:": "主題：",
   "System Fonts": "システムフォント",
+  "Table of Contents": "目次",
   "TTS not supported in this device": "このデバイスではTTSがサポートされていません",
   "Theme Color": "テーマカラー",
   "Theme Mode": "テーマモード",
diff --git a/apps/readest-app/public/locales/ko/translation.json b/apps/readest-app/public/locales/ko/translation.json
index de9a05e8..038dd2b1 100644
--- a/apps/readest-app/public/locales/ko/translation.json
+++ b/apps/readest-app/public/locales/ko/translation.json
@@ -114,6 +114,7 @@
   "Speak": "말하기",
   "Subjects:": "주제:",
   "System Fonts": "시스템 글꼴",
+  "Table of Contents": "목차",
   "TTS not supported in this device": "이 장치에서 TTS가 지원되지 않음",
   "Theme Color": "테마 색상",
   "Theme Mode": "테마 모드",
diff --git a/apps/readest-app/public/locales/pt/translation.json b/apps/readest-app/public/locales/pt/translation.json
index fc7869f4..36bfda61 100644
--- a/apps/readest-app/public/locales/pt/translation.json
+++ b/apps/readest-app/public/locales/pt/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Falar",
   "Subjects:": "Assuntos:",
   "System Fonts": "Fontes do Sistema",
+  "Table of Contents": "Índice",
   "TTS not supported in this device": "TTS não suportado neste dispositivo",
   "Theme Color": "Cor do Tema",
   "Theme Mode": "Modo do Tema",
diff --git a/apps/readest-app/public/locales/ru/translation.json b/apps/readest-app/public/locales/ru/translation.json
index 4f81f5e3..dbae3680 100644
--- a/apps/readest-app/public/locales/ru/translation.json
+++ b/apps/readest-app/public/locales/ru/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Произнести",
   "Subjects:": "Темы:",
   "System Fonts": "Системные шрифты",
+  "Table of Contents": "Содержание",
   "TTS not supported in this device": "TTS не поддерживается на этом устройстве",
   "Theme Color": "Цвет темы",
   "Theme Mode": "Режим темы",
diff --git a/apps/readest-app/public/locales/tr/translation.json b/apps/readest-app/public/locales/tr/translation.json
index d10cc6c0..f5d039f0 100644
--- a/apps/readest-app/public/locales/tr/translation.json
+++ b/apps/readest-app/public/locales/tr/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Konuş",
   "Subjects:": "Konular:",
   "System Fonts": "Sistem Yazı Tipleri",
+  "Table of Contents": "İçindekiler",
   "TTS not supported in this device": "Bu cihazda TTS desteklenmiyor",
   "Theme Color": "Tema Rengi",
   "Theme Mode": "Tema Modu",
diff --git a/apps/readest-app/public/locales/vi/translation.json b/apps/readest-app/public/locales/vi/translation.json
index 2fd49330..4e2de633 100644
--- a/apps/readest-app/public/locales/vi/translation.json
+++ b/apps/readest-app/public/locales/vi/translation.json
@@ -114,6 +114,7 @@
   "Speak": "Đọc",
   "Subjects:": "Chủ đề:",
   "System Fonts": "Phông chữ hệ thống",
+  "Table of Contents": "Mục lục",
   "TTS not supported in this device": "TTS không được hỗ trợ trên thiết bị này",
   "Theme Color": "Màu chủ đề",
   "Theme Mode": "Chế độ chủ đề",
diff --git a/apps/readest-app/public/locales/zh-CN/translation.json b/apps/readest-app/public/locales/zh-CN/translation.json
index 76dad697..5e48a140 100644
--- a/apps/readest-app/public/locales/zh-CN/translation.json
+++ b/apps/readest-app/public/locales/zh-CN/translation.json
@@ -114,6 +114,7 @@
   "Speak": "朗读",
   "Subjects:": "主题",
   "System Fonts": "系统字体",
+  "Table of Contents": "目录",
   "TTS not supported in this device": "此设备不支持 TTS",
   "Theme Color": "主题颜色",
   "Theme Mode": "主题模式",
diff --git a/apps/readest-app/public/locales/zh-TW/translation.json b/apps/readest-app/public/locales/zh-TW/translation.json
index 6ecadbdb..013a9880 100644
--- a/apps/readest-app/public/locales/zh-TW/translation.json
+++ b/apps/readest-app/public/locales/zh-TW/translation.json
@@ -114,6 +114,7 @@
   "Speak": "朗讀",
   "Subjects:": "主題",
   "System Fonts": "系統字體",
+  "Table of Contents": "目錄",
   "TTS not supported in this device": "此設備不支持 TTS",
   "Theme Color": "主題顏色",
   "Theme Mode": "主題模式",
diff --git a/apps/readest-app/src/app/reader/components/sidebar/BooknoteItem.tsx b/apps/readest-app/src/app/reader/components/sidebar/BooknoteItem.tsx
index c985e2ab..19687579 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/BooknoteItem.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/BooknoteItem.tsx
@@ -122,7 +122,12 @@ const BooknoteItem: React.FC<BooknoteItemProps> = ({ bookKey, item }) => {
               )}
               onClick={editNote.bind(null, item)}
             >
-              <div className='align-bottom text-blue-400'>{_('Edit')}</div>
+              <div className={clsx(
+                'align-bottom text-blue-400',
+                'transition duration-300 ease-in-out',
+                'group-hover:opacity-100 opacity-0',
+                'hover:text-blue-600',
+              )}>{_('Edit')}</div>
             </button>
           )}
           <button
@@ -132,7 +137,12 @@ const BooknoteItem: React.FC<BooknoteItemProps> = ({ bookKey, item }) => {
             )}
             onClick={deleteNote.bind(null, item)}
           >
-            <div className='align-bottom text-red-400'>{_('Delete')}</div>
+            <div className={clsx(
+              'align-bottom text-red-400',
+              'transition duration-300 ease-in-out',
+              'group-hover:opacity-100 opacity-0',
+              'hover:text-red-600',
+            )}>{_('Delete')}</div>
           </button>
         </div>
       </div>
diff --git a/apps/readest-app/src/app/reader/components/sidebar/Content.tsx b/apps/readest-app/src/app/reader/components/sidebar/Content.tsx
index ceca2d95..92fb8b8d 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/Content.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/Content.tsx
@@ -15,6 +15,8 @@ const SidebarContent: React.FC<{
   const { getConfig, setConfig } = useBookDataStore();
   const config = getConfig(sideBarBookKey);
   const [activeTab, setActiveTab] = useState(config?.viewSettings?.sideBarTab || 'toc');
+  const [fade, setFade] = useState(false);
+  const [targetTab, setTargetTab] = useState(activeTab);
 
   useEffect(() => {
     const container = scrollContainerRef.current;
@@ -49,10 +51,17 @@ const SidebarContent: React.FC<{
   }, [sideBarBookKey]);
 
   const handleTabChange = (tab: string) => {
+    setFade(true);
+    const timeout = setTimeout(() => {
+      setFade(false)
+      setTargetTab(tab);
+      setConfig(sideBarBookKey!, config);
+      clearTimeout(timeout);
+    }, 300);
+
     setActiveTab(tab);
     const config = getConfig(sideBarBookKey!)!;
     config.viewSettings!.sideBarTab = tab;
-    setConfig(sideBarBookKey!, config);
   };
 
   return (
@@ -63,14 +72,20 @@ const SidebarContent: React.FC<{
           'font-sans text-sm font-normal shadow-inner',
         )}
       >
-        <div ref={scrollContainerRef} className='scroll-container overflow-y-auto'>
-          {activeTab === 'toc' && bookDoc.toc && (
+        <div
+          ref={scrollContainerRef}
+          className={clsx(
+            'scroll-container overflow-y-auto transition-opacity duration-300 ease-in-out',
+            { 'opacity-0': fade, 'opacity-100': !fade }
+          )}
+        >
+          {targetTab === 'toc' && bookDoc.toc && (
             <TOCView toc={bookDoc.toc} bookKey={sideBarBookKey} />
           )}
-          {activeTab === 'annotations' && (
+          {targetTab === 'annotations' && (
             <BooknoteView type='annotation' toc={bookDoc.toc ?? []} bookKey={sideBarBookKey} />
           )}
-          {activeTab === 'bookmarks' && (
+          {targetTab === 'bookmarks' && (
             <BooknoteView type='bookmark' toc={bookDoc.toc ?? []} bookKey={sideBarBookKey} />
           )}
         </div>
diff --git a/apps/readest-app/src/app/reader/components/sidebar/TOCView.tsx b/apps/readest-app/src/app/reader/components/sidebar/TOCView.tsx
index a2a5f014..2fe8380c 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/TOCView.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/TOCView.tsx
@@ -126,7 +126,7 @@ const TOCView: React.FC<{
       const rect = currentItem.getBoundingClientRect();
       const isVisible = rect.top >= 0 && rect.bottom <= window.innerHeight;
       if (!isVisible) {
-        (currentItem as HTMLElement).scrollIntoView({ behavior: 'smooth', block: 'center' });
+        (currentItem as HTMLElement).scrollIntoView({ behavior: 'instant', block: 'center' });
       }
       (currentItem as HTMLElement).setAttribute('aria-current', 'page');
     }
diff --git a/apps/readest-app/src/app/reader/components/sidebar/TabNavigation.tsx b/apps/readest-app/src/app/reader/components/sidebar/TabNavigation.tsx
index 7f6c3bd1..c32a4893 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/TabNavigation.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/TabNavigation.tsx
@@ -1,23 +1,54 @@
+import clsx from 'clsx';
 import React from 'react';
 import { MdToc, MdEditNote, MdBookmarkBorder } from 'react-icons/md';
 
+import { useTranslation } from '@/hooks/useTranslation';
+
 const TabNavigation: React.FC<{
   activeTab: string;
   onTabChange: (tab: string) => void;
-}> = ({ activeTab, onTabChange }) => (
-  <div className='bottom-tab border-base-300/50 flex w-full border-t'>
-    {['toc', 'annotations', 'bookmarks'].map((tab) => (
-      <button
-        key={tab}
-        className={`m-1.5 flex-1 rounded-md p-2 ${activeTab === tab ? 'bg-base-300' : ''}`}
-        onClick={() => onTabChange(tab)}
-      >
-        {tab === 'toc' && <MdToc size={20} className='mx-auto' />}
-        {tab === 'annotations' && <MdEditNote size={20} className='mx-auto' />}
-        {tab === 'bookmarks' && <MdBookmarkBorder size={20} className='mx-auto' />}
-      </button>
-    ))}
-  </div>
-);
+}> = ({ activeTab, onTabChange }) => {
+  const _ = useTranslation();
+
+  const tabs = ['toc', 'annotations', 'bookmarks'];
+
+  return (
+    <div className="bottom-tab border-base-300/50 flex w-full border-t relative">
+      <div
+        className={clsx(
+          'absolute bottom-0 left-0 h-full w-1/3 bg-base-300 -z-10',
+          'transition-transform duration-300 transform',
+          activeTab === 'toc' && 'translate-x-0',
+          activeTab === 'annotations' && 'translate-x-full',
+          activeTab === 'bookmarks' && 'translate-x-[200%]',
+        )}
+      />
+      {tabs.map((tab) => (
+          <div
+            key={tab}
+            className='tooltip z-50 tooltip-top m-1.5 flex-1 rounded-md p-2 cursor-pointer'
+            data-tip={tab === 'toc' ? _('Table of Contents') : tab === 'annotations' ? _('Annotate') : _('Bookmark')}
+          >
+            <div
+              className={clsx(
+                '',
+              )}
+              onClick={() => onTabChange(tab)}
+            >
+              {
+                tab === 'toc' ? (
+                  <MdToc size={20} className='mx-auto' />
+                ) : tab === 'annotations' ? (
+                  <MdEditNote size={20} className='mx-auto' />
+                ) : (
+                  <MdBookmarkBorder size={20} className='mx-auto' />
+                )
+              }
+            </div>
+          </div>
+      ))}
+    </div>
+  )
+};
 
 export default TabNavigation;