diff --git a/apps/readest-app/src/app/reader/components/settings/DialogMenu.tsx b/apps/readest-app/src/app/reader/components/settings/DialogMenu.tsx
index cf43f35b..43f8933e 100644
--- a/apps/readest-app/src/app/reader/components/settings/DialogMenu.tsx
+++ b/apps/readest-app/src/app/reader/components/settings/DialogMenu.tsx
@@ -2,6 +2,7 @@ import React from 'react';
 import { MdCheck } from 'react-icons/md';
 import { useSettingsStore } from '@/store/settingsStore';
 import { useTranslation } from '@/hooks/useTranslation';
+import { useDefaultIconSize } from '@/hooks/useResponsiveSize';
 
 interface DialogMenuProps {
   toggleDropdown?: () => void;
@@ -9,6 +10,7 @@ interface DialogMenuProps {
 
 const DialogMenu: React.FC<DialogMenuProps> = ({ toggleDropdown }) => {
   const _ = useTranslation();
+  const iconSize = useDefaultIconSize();
   const { isFontLayoutSettingsGlobal, setFontLayoutSettingsGlobal } = useSettingsStore();
 
   const handleToggleGlobal = () => {
@@ -26,7 +28,7 @@ const DialogMenu: React.FC<DialogMenuProps> = ({ toggleDropdown }) => {
         onClick={handleToggleGlobal}
       >
         <div className='flex items-center'>
-          <span style={{ minWidth: '20px' }}>
+          <span style={{ minWidth: `${iconSize}px` }}>
             {isFontLayoutSettingsGlobal && <MdCheck className='text-base-content' />}
           </span>
           <div
diff --git a/apps/readest-app/src/app/reader/components/settings/FontDropDown.tsx b/apps/readest-app/src/app/reader/components/settings/FontDropDown.tsx
index 7d5acd99..3a719c09 100644
--- a/apps/readest-app/src/app/reader/components/settings/FontDropDown.tsx
+++ b/apps/readest-app/src/app/reader/components/settings/FontDropDown.tsx
@@ -3,7 +3,7 @@ import React from 'react';
 import { FiChevronUp, FiChevronLeft } from 'react-icons/fi';
 import { MdCheck } from 'react-icons/md';
 import { useTranslation } from '@/hooks/useTranslation';
-import { useResponsiveSize } from '@/hooks/useResponsiveSize';
+import { useDefaultIconSize, useResponsiveSize } from '@/hooks/useResponsiveSize';
 
 interface DropdownProps {
   family?: string;
@@ -24,6 +24,7 @@ const FontDropdown: React.FC<DropdownProps> = ({
 }) => {
   const _ = useTranslation();
   const iconSize16 = useResponsiveSize(16);
+  const defaultIconSize = useDefaultIconSize();
   return (
     <div className='dropdown dropdown-top'>
       <button
@@ -40,7 +41,7 @@ const FontDropdown: React.FC<DropdownProps> = ({
         {options.map((option) => (
           <li key={option} onClick={() => onSelect(option)}>
             <div className='flex items-center px-0'>
-              <span style={{ minWidth: '20px' }}>
+              <span style={{ minWidth: `${defaultIconSize}px` }}>
                 {selected === option && <MdCheck className='text-base-content' />}
               </span>
               <span style={{ fontFamily: onGetFontFamily(option, family ?? '') }}>{option}</span>
@@ -50,7 +51,7 @@ const FontDropdown: React.FC<DropdownProps> = ({
         {moreOptions && moreOptions.length > 0 && (
           <li className='dropdown dropdown-left dropdown-top'>
             <div className='flex items-center px-0'>
-              <span style={{ minWidth: '20px' }}>
+              <span style={{ minWidth: `${iconSize16}px` }}>
                 <FiChevronLeft size={iconSize16} />
               </span>
               <span>{_('System Fonts')}</span>
@@ -65,7 +66,7 @@ const FontDropdown: React.FC<DropdownProps> = ({
               {moreOptions.map((option) => (
                 <li key={option} onClick={() => onSelect(option)}>
                   <div className='flex items-center px-2'>
-                    <span style={{ minWidth: '20px' }}>
+                    <span style={{ minWidth: `${defaultIconSize}px` }}>
                       {selected === option && <MdCheck className='text-base-content' />}
                     </span>
                     <span style={{ fontFamily: onGetFontFamily(option, family ?? '') }}>
diff --git a/apps/readest-app/src/app/reader/components/settings/MiscPanel.tsx b/apps/readest-app/src/app/reader/components/settings/MiscPanel.tsx
index 022118de..eb15d652 100644
--- a/apps/readest-app/src/app/reader/components/settings/MiscPanel.tsx
+++ b/apps/readest-app/src/app/reader/components/settings/MiscPanel.tsx
@@ -135,7 +135,7 @@ const MiscPanel: React.FC<{ bookKey: string }> = ({ bookKey }) => {
         >
           <div className='relative p-1'>
             <textarea
-              className='textarea textarea-ghost h-48 w-full border-0 p-3 !outline-none'
+              className='textarea textarea-ghost h-48 w-full border-0 p-3 text-base !outline-none sm:text-sm'
               placeholder={_('Enter your custom CSS here...')}
               spellCheck='false'
               value={draftStylesheet}
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 d2dd8d64..dfe30a9e 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/Content.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/Content.tsx
@@ -68,8 +68,8 @@ const SidebarContent: React.FC<{
     <>
       <div
         className={clsx(
-          'sidebar-content flex min-h-0 flex-grow flex-col',
-          'font-sans text-sm font-normal shadow-inner',
+          'sidebar-content flex min-h-0 flex-grow flex-col shadow-inner',
+          'font-sans text-base font-normal sm:text-sm',
         )}
       >
         <div
diff --git a/apps/readest-app/src/app/reader/components/sidebar/Header.tsx b/apps/readest-app/src/app/reader/components/sidebar/Header.tsx
index 79f9899b..d2e65103 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/Header.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/Header.tsx
@@ -29,7 +29,7 @@ const SidebarHeader: React.FC<{
         isTrafficLightVisible ? 'pl-20' : 'pl-1.5',
       )}
     >
-      <div className='flex items-center gap-x-4'>
+      <div className='flex items-center gap-x-8'>
         <button
           onClick={onClose}
           className={'btn btn-ghost btn-circle flex h-6 min-h-6 w-6 hover:bg-transparent sm:hidden'}
diff --git a/apps/readest-app/src/app/reader/components/sidebar/SearchOptions.tsx b/apps/readest-app/src/app/reader/components/sidebar/SearchOptions.tsx
index 85216f36..f3948ede 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/SearchOptions.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/SearchOptions.tsx
@@ -2,6 +2,7 @@ import React from 'react';
 import { MdCheck } from 'react-icons/md';
 import { BookSearchConfig } from '@/types/book';
 import { useTranslation } from '@/hooks/useTranslation';
+import { useDefaultIconSize } from '@/hooks/useResponsiveSize';
 
 interface SearchOptionsProps {
   searchConfig: BookSearchConfig;
@@ -21,7 +22,7 @@ const Option: React.FC<OptionProps> = ({ label, isActive, onClick }) => (
     onClick={onClick}
   >
     <div className='flex items-center'>
-      <span style={{ minWidth: '20px' }}>
+      <span style={{ minWidth: `${useDefaultIconSize()}px` }}>
         {isActive && <MdCheck className='text-base-content' />}
       </span>
       <span className='ml-2'>{label}</span>
diff --git a/apps/readest-app/src/app/reader/components/tts/TTSControl.tsx b/apps/readest-app/src/app/reader/components/tts/TTSControl.tsx
index ff267284..085633b5 100644
--- a/apps/readest-app/src/app/reader/components/tts/TTSControl.tsx
+++ b/apps/readest-app/src/app/reader/components/tts/TTSControl.tsx
@@ -183,9 +183,13 @@ const TTSControl = () => {
     throttle(async (rate: number) => {
       const ttsController = ttsControllerRef.current;
       if (ttsController) {
-        await ttsController.stop();
-        await ttsController.setRate(rate);
-        await ttsController.start();
+        if (ttsController.state === 'playing') {
+          await ttsController.stop();
+          await ttsController.setRate(rate);
+          await ttsController.start();
+        } else {
+          await ttsController.setRate(rate);
+        }
       }
     }, 3000),
     [],
@@ -196,9 +200,13 @@ const TTSControl = () => {
     throttle(async (voice: string) => {
       const ttsController = ttsControllerRef.current;
       if (ttsController) {
-        await ttsController.stop();
-        await ttsController.setVoice(voice);
-        await ttsController.start();
+        if (ttsController.state === 'playing') {
+          await ttsController.stop();
+          await ttsController.setVoice(voice);
+          await ttsController.start();
+        } else {
+          await ttsController.setVoice(voice);
+        }
       }
     }, 3000),
     [],
diff --git a/apps/readest-app/src/app/reader/components/tts/TTSPanel.tsx b/apps/readest-app/src/app/reader/components/tts/TTSPanel.tsx
index 4efd74db..e1f28830 100644
--- a/apps/readest-app/src/app/reader/components/tts/TTSPanel.tsx
+++ b/apps/readest-app/src/app/reader/components/tts/TTSPanel.tsx
@@ -6,7 +6,7 @@ import { MdPlayCircle, MdPauseCircle, MdFastRewind, MdFastForward, MdStop } from
 import { RiVoiceAiFill } from 'react-icons/ri';
 import { MdCheck } from 'react-icons/md';
 import { TTSVoice } from '@/services/tts';
-import { useResponsiveSize } from '@/hooks/useResponsiveSize';
+import { useDefaultIconSize, useResponsiveSize } from '@/hooks/useResponsiveSize';
 
 type TTSPanelProps = {
   bookKey: string;
@@ -43,6 +43,7 @@ const TTSPanel = ({
   const [rate, setRate] = useState(viewSettings?.ttsRate ?? 1.0);
   const [selectedVoice, setSelectedVoice] = useState(viewSettings?.ttsVoice ?? '');
 
+  const defaultIconSize = useDefaultIconSize();
   const iconSize32 = useResponsiveSize(32);
   const iconSize48 = useResponsiveSize(48);
 
@@ -144,10 +145,10 @@ const TTSPanel = ({
                 onClick={() => !voice.disabled && handleSelectVoice(voice.id)}
               >
                 <div className='flex items-center px-2'>
-                  <span style={{ minWidth: '20px' }}>
+                  <span style={{ minWidth: `${defaultIconSize}px` }}>
                     {selectedVoice === voice.id && <MdCheck className='text-base-content' />}
                   </span>
-                  <span className={clsx('text-sm', voice.disabled && 'text-gray-400')}>
+                  <span className={clsx('text-base sm:text-sm', voice.disabled && 'text-gray-400')}>
                     {voice.name}
                   </span>
                 </div>
diff --git a/apps/readest-app/src/components/MenuItem.tsx b/apps/readest-app/src/components/MenuItem.tsx
index e67228b8..69f04ea6 100644
--- a/apps/readest-app/src/components/MenuItem.tsx
+++ b/apps/readest-app/src/components/MenuItem.tsx
@@ -1,5 +1,6 @@
 import clsx from 'clsx';
 import React from 'react';
+import { useDefaultIconSize } from '@/hooks/useResponsiveSize';
 
 interface MenuItemProps {
   label: string;
@@ -22,6 +23,7 @@ const MenuItem: React.FC<MenuItemProps> = ({
   children,
   onClick,
 }) => {
+  const iconSize = useDefaultIconSize();
   const menuButton = (
     <button
       className={clsx(
@@ -32,10 +34,10 @@ const MenuItem: React.FC<MenuItemProps> = ({
       disabled={disabled}
     >
       <div className='flex items-center'>
-        {!noIcon && <span style={{ minWidth: '20px' }}>{icon}</span>}
+        {!noIcon && <span style={{ minWidth: `${iconSize}px` }}>{icon}</span>}
         <span className={clsx('ml-2 max-w-32 truncate', labelClass)}>{label}</span>
       </div>
-      {shortcut && <span className='text-neutral-content text-sm'>{shortcut}</span>}
+      {shortcut && <span className='text-neutral-content hidden text-sm sm:flex'>{shortcut}</span>}
     </button>
   );
 
diff --git a/apps/readest-app/src/styles/globals.css b/apps/readest-app/src/styles/globals.css
index b80eddd0..bc1e5c53 100644
--- a/apps/readest-app/src/styles/globals.css
+++ b/apps/readest-app/src/styles/globals.css
@@ -164,6 +164,13 @@ foliate-view {
   font-weight: 400;
 }
 
+@media (max-width: 768px) {
+  .dropdown-content,
+  .settings-content {
+    font-size: 16px;
+  }
+}
+
 .config-item {
   @apply flex h-14 items-center justify-between p-4;
   @apply hover:bg-base-100/50;