diff --git a/apps/readest-app/public/locales/zh-CN/translation.json b/apps/readest-app/public/locales/zh-CN/translation.json
index 0f234dcb..44825b2d 100644
--- a/apps/readest-app/public/locales/zh-CN/translation.json
+++ b/apps/readest-app/public/locales/zh-CN/translation.json
@@ -64,7 +64,7 @@
   "Match Case": "匹配大小写",
   "Match Diacritics": "匹配重音符号",
   "Match Whole Words": "匹配整个单词",
-  "Maximum Block Size": "内容最大宽度",
+  "Maximum Block Size": "内容最大高度",
   "Maximum Inline Size": "每栏最大宽度",
   "Maximum Number of Columns": "分栏数",
   "Minimum Font Size": "最小字号",
diff --git a/apps/readest-app/public/locales/zh-TW/translation.json b/apps/readest-app/public/locales/zh-TW/translation.json
index a075a663..a342acee 100644
--- a/apps/readest-app/public/locales/zh-TW/translation.json
+++ b/apps/readest-app/public/locales/zh-TW/translation.json
@@ -64,7 +64,7 @@
   "Match Case": "匹配大小寫",
   "Match Diacritics": "匹配重音符號",
   "Match Whole Words": "匹配整個單詞",
-  "Maximum Block Size": "內容最大寬度",
+  "Maximum Block Size": "內容最大高度",
   "Maximum Inline Size": "每欄最大寬度",
   "Maximum Number of Columns": "分欄數",
   "Minimum Font Size": "最小字號",
diff --git a/apps/readest-app/src/app/reader/components/FoliateViewer.tsx b/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
index 6d324d7e..813fd765 100644
--- a/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
+++ b/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
@@ -12,7 +12,6 @@ import { useAutoHideScrollbar } from '../hooks/useAutoHideScrollbar';
 import { getStyles, mountAdditionalFonts } from '@/utils/style';
 import { getBookDirFromWritingMode } from '@/utils/book';
 import { useTheme } from '@/hooks/useTheme';
-import { ONE_COLUMN_MAX_INLINE_SIZE } from '@/services/constants';
 import {
   handleKeydown,
   handleMousedown,
@@ -23,6 +22,7 @@ import {
   handleTouchMove,
   handleTouchEnd,
 } from '../utils/iframeEventHandlers';
+import { getMaxInlineSize } from '@/utils/config';
 
 const FoliateViewer: React.FC<{
   bookKey: string;
@@ -154,10 +154,7 @@ const FoliateViewer: React.FC<{
       const gapPercent = viewSettings.gapPercent!;
       const animated = viewSettings.animated!;
       const maxColumnCount = viewSettings.maxColumnCount!;
-      const maxInlineSize =
-        maxColumnCount === 1 || isScrolled
-          ? ONE_COLUMN_MAX_INLINE_SIZE
-          : viewSettings.maxInlineSize!;
+      const maxInlineSize = getMaxInlineSize(viewSettings);
       const maxBlockSize = viewSettings.maxBlockSize!;
       if (animated) {
         view.renderer.setAttribute('animated', '');
diff --git a/apps/readest-app/src/app/reader/components/ViewMenu.tsx b/apps/readest-app/src/app/reader/components/ViewMenu.tsx
index 9e07c3ea..da6cc9f2 100644
--- a/apps/readest-app/src/app/reader/components/ViewMenu.tsx
+++ b/apps/readest-app/src/app/reader/components/ViewMenu.tsx
@@ -5,17 +5,13 @@ import { BiMoon, BiSun } from 'react-icons/bi';
 import { TbSunMoon } from 'react-icons/tb';
 import { MdZoomOut, MdZoomIn, MdCheck } from 'react-icons/md';
 
-import {
-  MAX_ZOOM_LEVEL,
-  MIN_ZOOM_LEVEL,
-  ONE_COLUMN_MAX_INLINE_SIZE,
-  ZOOM_STEP,
-} from '@/services/constants';
+import { MAX_ZOOM_LEVEL, MIN_ZOOM_LEVEL, ZOOM_STEP } from '@/services/constants';
 import MenuItem from '@/components/MenuItem';
 import { useReaderStore } from '@/store/readerStore';
 import { useTranslation } from '@/hooks/useTranslation';
 import { useTheme, ThemeMode } from '@/hooks/useTheme';
 import { getStyles } from '@/utils/style';
+import { getMaxInlineSize } from '@/utils/config';
 
 interface ViewMenuProps {
   bookKey: string;
@@ -65,7 +61,7 @@ const ViewMenu: React.FC<ViewMenuProps> = ({
     getView(bookKey)?.renderer.setAttribute('flow', isScrolledMode ? 'scrolled' : 'paginated');
     getView(bookKey)?.renderer.setAttribute(
       'max-inline-size',
-      `${viewSettings.maxColumnCount === 1 || isScrolledMode ? ONE_COLUMN_MAX_INLINE_SIZE : viewSettings.maxInlineSize}px`,
+      `${getMaxInlineSize(viewSettings)}px`,
     );
     getView(bookKey)?.renderer.setStyles?.(getStyles(viewSettings!, themeCode));
     viewSettings!.scrolled = isScrolledMode;
diff --git a/apps/readest-app/src/app/reader/components/settings/FontPanel.tsx b/apps/readest-app/src/app/reader/components/settings/FontPanel.tsx
index eea005df..8422903f 100644
--- a/apps/readest-app/src/app/reader/components/settings/FontPanel.tsx
+++ b/apps/readest-app/src/app/reader/components/settings/FontPanel.tsx
@@ -17,9 +17,10 @@ import { useReaderStore } from '@/store/readerStore';
 import { useSettingsStore } from '@/store/settingsStore';
 import { useTranslation } from '@/hooks/useTranslation';
 import { useTheme } from '@/hooks/useTheme';
+import { useEnv } from '@/context/EnvContext';
 import { getStyles } from '@/utils/style';
 import { getOSPlatform } from '@/utils/misc';
-import { FONT_ENUM_SUPPORTED_OS_PLATFORMS, getSysFontsList } from '@/utils/font';
+import { getSysFontsList } from '@/utils/font';
 import { isTauriAppPlatform } from '@/services/environment';
 
 interface FontFaceProps {
@@ -60,6 +61,7 @@ const FontFace = ({
 
 const FontPanel: React.FC<{ bookKey: string }> = ({ bookKey }) => {
   const _ = useTranslation();
+  const { appService } = useEnv();
   const { settings, isFontLayoutSettingsGlobal, setSettings } = useSettingsStore();
   const { getView, getViewSettings, setViewSettings } = useReaderStore();
   const view = getView(bookKey);
@@ -109,7 +111,7 @@ const FontPanel: React.FC<{ bookKey: string }> = ({ bookKey }) => {
   const [fontWeight, setFontWeight] = useState(viewSettings.fontWeight!);
 
   useEffect(() => {
-    if (isTauriAppPlatform() && FONT_ENUM_SUPPORTED_OS_PLATFORMS.includes(osPlatform)) {
+    if (isTauriAppPlatform() && appService?.hasSysFontsList) {
       getSysFontsList().then((fonts) => {
         setSysFonts(fonts);
       });
diff --git a/apps/readest-app/src/app/reader/components/settings/LayoutPanel.tsx b/apps/readest-app/src/app/reader/components/settings/LayoutPanel.tsx
index 44e46bd8..991d252b 100644
--- a/apps/readest-app/src/app/reader/components/settings/LayoutPanel.tsx
+++ b/apps/readest-app/src/app/reader/components/settings/LayoutPanel.tsx
@@ -2,13 +2,13 @@ import React, { useEffect, useState } from 'react';
 import { MdOutlineAutoMode } from 'react-icons/md';
 import { MdOutlineTextRotationDown, MdOutlineTextRotationNone } from 'react-icons/md';
 
-import { ONE_COLUMN_MAX_INLINE_SIZE } from '@/services/constants';
 import { useSettingsStore } from '@/store/settingsStore';
 import { useReaderStore } from '@/store/readerStore';
 import { useBookDataStore } from '@/store/bookDataStore';
 import { useTranslation } from '@/hooks/useTranslation';
 import { useTheme } from '@/hooks/useTheme';
 import { getStyles } from '@/utils/style';
+import { getMaxInlineSize } from '@/utils/config';
 import { getBookDirFromWritingMode, getBookLangCode } from '@/utils/book';
 import NumberInput from './NumberInput';
 
@@ -147,10 +147,7 @@ const LayoutPanel: React.FC<{ bookKey: string }> = ({ bookKey }) => {
       setSettings(settings);
     }
     view?.renderer.setAttribute('max-column-count', maxColumnCount);
-    view?.renderer.setAttribute(
-      'max-inline-size',
-      `${maxColumnCount === 1 || viewSettings.scrolled ? ONE_COLUMN_MAX_INLINE_SIZE : maxInlineSize}px`,
-    );
+    view?.renderer.setAttribute('max-inline-size', `${getMaxInlineSize(viewSettings)}px`);
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [maxColumnCount]);
 
@@ -161,10 +158,7 @@ const LayoutPanel: React.FC<{ bookKey: string }> = ({ bookKey }) => {
       settings.globalViewSettings.maxInlineSize = maxInlineSize;
       setSettings(settings);
     }
-    view?.renderer.setAttribute(
-      'max-inline-size',
-      `${maxColumnCount === 1 || viewSettings.scrolled ? ONE_COLUMN_MAX_INLINE_SIZE : maxInlineSize}px`,
-    );
+    view?.renderer.setAttribute('max-inline-size', `${getMaxInlineSize(viewSettings)}px`);
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [maxInlineSize]);
 
@@ -353,6 +347,7 @@ const LayoutPanel: React.FC<{ bookKey: string }> = ({ bookKey }) => {
               label={_('Maximum Inline Size')}
               value={maxInlineSize}
               onChange={setMaxInlineSize}
+              disabled={maxColumnCount === 1 || viewSettings.scrolled}
               min={500}
               max={9999}
               step={100}
diff --git a/apps/readest-app/src/app/reader/components/settings/NumberInput.tsx b/apps/readest-app/src/app/reader/components/settings/NumberInput.tsx
index a03c3bc1..6f20b0e5 100644
--- a/apps/readest-app/src/app/reader/components/settings/NumberInput.tsx
+++ b/apps/readest-app/src/app/reader/components/settings/NumberInput.tsx
@@ -9,6 +9,7 @@ interface NumberInputProps {
   min: number;
   max: number;
   step?: number;
+  disabled?: boolean;
   onChange: (value: number) => void;
 }
 
@@ -20,6 +21,7 @@ const NumberInput: React.FC<NumberInputProps> = ({
   min,
   max,
   step,
+  disabled,
 }) => {
   const [localValue, setLocalValue] = useState(value);
   const numberStep = step || 1;
@@ -74,13 +76,13 @@ const NumberInput: React.FC<NumberInputProps> = ({
         />
         <button
           onClick={decrement}
-          className={`btn btn-circle btn-sm ${value === min ? 'btn-disabled !bg-opacity-5' : ''}`}
+          className={`btn btn-circle btn-sm ${value <= min || disabled ? 'btn-disabled !bg-opacity-5' : ''}`}
         >
           <FiMinus className='h-4 w-4' />
         </button>
         <button
           onClick={increment}
-          className={`btn btn-circle btn-sm ${value === max ? 'btn-disabled !bg-opacity-5' : ''}`}
+          className={`btn btn-circle btn-sm ${value >= max || disabled ? 'btn-disabled !bg-opacity-5' : ''}`}
         >
           <FiPlus className='h-4 w-4' />
         </button>
diff --git a/apps/readest-app/src/app/reader/components/settings/SettingsDialog.tsx b/apps/readest-app/src/app/reader/components/settings/SettingsDialog.tsx
index 815d6e93..53cd9d52 100644
--- a/apps/readest-app/src/app/reader/components/settings/SettingsDialog.tsx
+++ b/apps/readest-app/src/app/reader/components/settings/SettingsDialog.tsx
@@ -64,7 +64,7 @@ const SettingsDialog: React.FC<{ bookKey: string; config: BookConfig }> = ({ boo
         isOpen={true}
         onClose={handleClose}
         className='modal-open'
-        boxClassName='sm:w-1/2 sm:min-w-[480px] sm:h-[65%]'
+        boxClassName='sm:min-w-[480px]'
         header={
           <div className='flex w-full items-center justify-between'>
             <button
diff --git a/apps/readest-app/src/components/Dialog.tsx b/apps/readest-app/src/components/Dialog.tsx
index 9a72dfa3..71392264 100644
--- a/apps/readest-app/src/components/Dialog.tsx
+++ b/apps/readest-app/src/components/Dialog.tsx
@@ -110,7 +110,10 @@ const Dialog: React.FC<DialogProps> = ({
       <div
         className={clsx(
           'modal-box settings-content z-20 flex flex-col rounded-none rounded-tl-2xl rounded-tr-2xl p-0 sm:rounded-2xl',
-          'h-full max-h-full w-full max-w-full sm:w-[65%] sm:max-w-[600px]',
+          'h-full max-h-full w-full max-w-full',
+          window.innerWidth < window.innerHeight
+            ? 'sm:h-[50%] sm:w-3/4'
+            : 'sm:h-[65%] sm:w-1/2 sm:max-w-[600px]',
           appService?.hasSafeAreaInset && 'pt-[env(safe-area-inset-top)] sm:pt-0',
           boxClassName,
         )}
diff --git a/apps/readest-app/src/pages/api/sync.ts b/apps/readest-app/src/pages/api/sync.ts
index db56350b..f6aee57a 100644
--- a/apps/readest-app/src/pages/api/sync.ts
+++ b/apps/readest-app/src/pages/api/sync.ts
@@ -30,19 +30,26 @@ const getUserAndToken = async (req: NextRequest) => {
   if (!authHeader) return {};
 
   const token = authHeader.replace('Bearer ', '');
-  const {
-    data: { user },
-    error,
-  } = await supabase.auth.getUser(token);
-
-  if (error || !user) return {};
-  return { user, token };
+  try {
+    const {
+      data: { user },
+      error,
+    } = await supabase.auth.getUser(token);
+    if (error?.message === 'fetch failed') {
+      return { error: 'Network error' };
+    } else if (error || !user) {
+      return { error: 'Not authenticated' };
+    }
+    return { user, token };
+  } catch {
+    return { error: 'Network error' };
+  }
 };
 
 export async function GET(req: NextRequest) {
-  const { user, token } = await getUserAndToken(req);
-  if (!user || !token) {
-    return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+  const { user, token, error } = await getUserAndToken(req);
+  if (!user || !token || error) {
+    return NextResponse.json({ error: error || 'Unknown error' }, { status: 401 });
   }
   const supabase = createSupabaseClient(token);
 
@@ -114,9 +121,9 @@ export async function GET(req: NextRequest) {
 }
 
 export async function POST(req: NextRequest) {
-  const { user, token } = await getUserAndToken(req);
-  if (!user || !token) {
-    return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+  const { user, token, error } = await getUserAndToken(req);
+  if (!user || !token || error) {
+    return NextResponse.json({ error: error || 'Unknown error' }, { status: 401 });
   }
   const supabase = createSupabaseClient(token);
 
diff --git a/apps/readest-app/src/services/appService.ts b/apps/readest-app/src/services/appService.ts
index 97e18723..81a9e1f5 100644
--- a/apps/readest-app/src/services/appService.ts
+++ b/apps/readest-app/src/services/appService.ts
@@ -53,6 +53,7 @@ export abstract class BaseAppService implements AppService {
   abstract hasRoundedWindow: boolean;
   abstract hasSafeAreaInset: boolean;
   abstract hasHaptics: boolean;
+  abstract hasSysFontsList: boolean;
 
   abstract resolvePath(fp: string, base: BaseDir): { baseDir: number; base: BaseDir; fp: string };
   abstract getCoverImageUrl(book: Book): string;
diff --git a/apps/readest-app/src/services/constants.ts b/apps/readest-app/src/services/constants.ts
index 71ccef3b..11583c5c 100644
--- a/apps/readest-app/src/services/constants.ts
+++ b/apps/readest-app/src/services/constants.ts
@@ -10,6 +10,7 @@ import {
 } from '@/types/book';
 import { ReadSettings, SystemSettings } from '@/types/settings';
 import { UserStorageQuota } from '@/types/user';
+import { getDefaultMaxBlockSize, getDefaultMaxInlineSize } from '@/utils/config';
 
 export const LOCAL_BOOKS_SUBDIR = 'Readest/Books';
 export const CLOUD_BOOKS_SUBDIR = 'Readest/Books';
@@ -62,8 +63,8 @@ export const DEFAULT_BOOK_LAYOUT: BookLayout = {
   scrolled: false,
   disableClick: false,
   maxColumnCount: 2,
-  maxInlineSize: 720,
-  maxBlockSize: 1440,
+  maxInlineSize: getDefaultMaxInlineSize(),
+  maxBlockSize: getDefaultMaxBlockSize(),
   animated: false,
   writingMode: 'auto',
   vertical: false,
@@ -381,8 +382,6 @@ export const ANDROID_FONTS = [
   'XiHeiti',
 ];
 
-export const ONE_COLUMN_MAX_INLINE_SIZE = 9999;
-
 export const BOOK_IDS_SEPARATOR = '+';
 
 export const DOWNLOAD_READEST_URL = 'https://readest.com?utm_source=readest_web';
diff --git a/apps/readest-app/src/services/nativeAppService.ts b/apps/readest-app/src/services/nativeAppService.ts
index 48a77aa9..efad7750 100644
--- a/apps/readest-app/src/services/nativeAppService.ts
+++ b/apps/readest-app/src/services/nativeAppService.ts
@@ -127,6 +127,7 @@ export class NativeAppService extends BaseAppService {
   hasRoundedWindow = !(OS_TYPE === 'ios' || OS_TYPE === 'android');
   hasSafeAreaInset = OS_TYPE === 'ios' || OS_TYPE === 'android';
   hasHaptics = OS_TYPE === 'ios' || OS_TYPE === 'android';
+  hasSysFontsList = !(OS_TYPE === 'ios' || OS_TYPE === 'android');
 
   override resolvePath(fp: string, base: BaseDir): { baseDir: number; base: BaseDir; fp: string } {
     return resolvePath(fp, base);
diff --git a/apps/readest-app/src/services/webAppService.ts b/apps/readest-app/src/services/webAppService.ts
index 37b40687..fa327f9e 100644
--- a/apps/readest-app/src/services/webAppService.ts
+++ b/apps/readest-app/src/services/webAppService.ts
@@ -189,6 +189,7 @@ export class WebAppService extends BaseAppService {
   hasRoundedWindow = false;
   hasSafeAreaInset = isPWA();
   hasHaptics = false;
+  hasSysFontsList = false;
 
   override resolvePath(fp: string, base: BaseDir): { baseDir: number; base: BaseDir; fp: string } {
     return resolvePath(fp, base);
diff --git a/apps/readest-app/src/types/system.ts b/apps/readest-app/src/types/system.ts
index bba0f76b..aedff190 100644
--- a/apps/readest-app/src/types/system.ts
+++ b/apps/readest-app/src/types/system.ts
@@ -30,6 +30,7 @@ export interface AppService {
   hasRoundedWindow: boolean;
   hasSafeAreaInset: boolean;
   hasHaptics: boolean;
+  hasSysFontsList: boolean;
   isMobile: boolean;
   isAppDataSandbox: boolean;
   isAndroidApp: boolean;
diff --git a/apps/readest-app/src/utils/config.ts b/apps/readest-app/src/utils/config.ts
new file mode 100644
index 00000000..b3841624
--- /dev/null
+++ b/apps/readest-app/src/utils/config.ts
@@ -0,0 +1,25 @@
+import { ViewSettings } from '@/types/book';
+
+export const getMaxInlineSize = (viewSettings: ViewSettings) => {
+  const isScrolled = viewSettings.scrolled!;
+  const maxColumnCount = viewSettings.maxColumnCount!;
+  const screenWidth = window.innerWidth;
+
+  return maxColumnCount === 1 || isScrolled ? screenWidth : viewSettings.maxInlineSize!;
+};
+
+export const getDefaultMaxInlineSize = () => {
+  if (typeof window === 'undefined') return 720;
+
+  const screenWidth = window.innerWidth;
+  const screenHeight = window.innerHeight;
+  return screenWidth < screenHeight ? screenWidth : 720;
+};
+
+export const getDefaultMaxBlockSize = () => {
+  if (typeof window === 'undefined') return 1440;
+
+  const screenWidth = window.innerWidth;
+  const screenHeight = window.innerHeight;
+  return Math.max(screenWidth, screenHeight);
+};