codedogQBY · k6G52m4Dz75W · Aug 7, 2026
diff --git a/packages/app-expo/assets/reader/reader.html b/packages/app-expo/assets/reader/reader.html
@@ -202,6 +202,7 @@
     let currentFontTheme = 'default';
     let currentCustomFontFaceCSS = '';
     let currentCustomFontFamily = '';
+    let currentUseBookFonts = true;
     let tapNavigationInFlight = false;
     let tapNavigationResetTimer = null;
     let readerElement = null;
@@ -1785,6 +1786,9 @@
       if (settings.customFontFamily !== undefined) {
         currentCustomFontFamily = settings.customFontFamily || '';
       }
+      if (settings.useBookFonts !== undefined) {
+        currentUseBookFonts = settings.useBookFonts !== false;
+      }
 
       if (settings.fontSize !== undefined) {
         currentFontSize = settings.fontSize;
@@ -1804,7 +1808,7 @@
       }
 
       if (settings.fontSize !== undefined || settings.lineHeight !== undefined || settings.fontTheme !== undefined || settings.paragraphSpacing !== undefined
-          || settings.customFontFamily !== undefined || settings.customFontFaceCSS !== undefined) {
+          || settings.customFontFamily !== undefined || settings.customFontFaceCSS !== undefined || settings.useBookFonts !== undefined) {
         const fontThemes = {
           default: { cjk: '-apple-system, BlinkMacSystemFont, system-ui, sans-serif', serif: '-apple-system, BlinkMacSystemFont, system-ui, sans-serif' },
           system: { cjk: '-apple-system, BlinkMacSystemFont, system-ui, sans-serif', serif: '-apple-system, BlinkMacSystemFont, system-ui, sans-serif' },
@@ -1836,6 +1840,15 @@
         const layoutScale = currentFontSize / BASELINE_FONT_SIZE;
         const ps = Math.round(currentParagraphSpacing * layoutScale);
 
+        // When useBookFonts is enabled (default), do not force the reader
+        // font family onto every element so the book's own fonts (e.g.
+        // embedded @font-face families) render where the book specifies them.
+        const bodyStarFontOverride = currentUseBookFonts
+          ? ''
+          : `:root:not(.vrtl):not(.vltr) body *:not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *) {
+  font-family: var(--readany-font-family) !important;
+}`;
+
         const baseStyles = `
           :root {
             --readany-font-family: ${fontFamily};
@@ -1847,9 +1860,7 @@
             -webkit-text-size-adjust: none;
             text-size-adjust: none;
           }
-          :root:not(.vrtl):not(.vltr) body *:not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *) {
-            font-family: var(--readany-font-family) !important;
-          }
+          ${bodyStarFontOverride}
           :root:not(.vrtl):not(.vltr) body *:not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *):not(rt):not(rp) {
             font-size: ${fSize}px !important;
           }

diff --git a/packages/app-expo/assets/reader/reader.template.html b/packages/app-expo/assets/reader/reader.template.html
@@ -202,6 +202,7 @@
     let currentFontTheme = 'default';
     let currentCustomFontFaceCSS = '';
     let currentCustomFontFamily = '';
+    let currentUseBookFonts = true;
     let tapNavigationInFlight = false;
     let tapNavigationResetTimer = null;
     let readerElement = null;
@@ -1785,6 +1786,9 @@
       if (settings.customFontFamily !== undefined) {
         currentCustomFontFamily = settings.customFontFamily || '';
       }
+      if (settings.useBookFonts !== undefined) {
+        currentUseBookFonts = settings.useBookFonts !== false;
+      }
 
       if (settings.fontSize !== undefined) {
         currentFontSize = settings.fontSize;
@@ -1804,7 +1808,7 @@
       }
 
       if (settings.fontSize !== undefined || settings.lineHeight !== undefined || settings.fontTheme !== undefined || settings.paragraphSpacing !== undefined
-          || settings.customFontFamily !== undefined || settings.customFontFaceCSS !== undefined) {
+          || settings.customFontFamily !== undefined || settings.customFontFaceCSS !== undefined || settings.useBookFonts !== undefined) {
         const fontThemes = {
           default: { cjk: '-apple-system, BlinkMacSystemFont, system-ui, sans-serif', serif: '-apple-system, BlinkMacSystemFont, system-ui, sans-serif' },
           system: { cjk: '-apple-system, BlinkMacSystemFont, system-ui, sans-serif', serif: '-apple-system, BlinkMacSystemFont, system-ui, sans-serif' },
@@ -1836,6 +1840,15 @@
         const layoutScale = currentFontSize / BASELINE_FONT_SIZE;
         const ps = Math.round(currentParagraphSpacing * layoutScale);
 
+        // When useBookFonts is enabled (default), do not force the reader
+        // font family onto every element so the book's own fonts (e.g.
+        // embedded @font-face families) render where the book specifies them.
+        const bodyStarFontOverride = currentUseBookFonts
+          ? ''
+          : `:root:not(.vrtl):not(.vltr) body *:not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *) {
+  font-family: var(--readany-font-family) !important;
+}`;
+
         const baseStyles = `
           :root {
             --readany-font-family: ${fontFamily};
@@ -1847,9 +1860,7 @@
             -webkit-text-size-adjust: none;
             text-size-adjust: none;
           }
-          :root:not(.vrtl):not(.vltr) body *:not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *) {
-            font-family: var(--readany-font-family) !important;
-          }
+          ${bodyStarFontOverride}
           :root:not(.vrtl):not(.vltr) body *:not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *):not(rt):not(rp) {
             font-size: ${fSize}px !important;
           }

diff --git a/packages/app-expo/src/hooks/use-reader-bridge.ts b/packages/app-expo/src/hooks/use-reader-bridge.ts
@@ -50,6 +50,7 @@ export interface ReaderInitialSettings {
   paragraphSpacing?: number;
   pageMargin?: number;
   fontTheme?: string;
+  useBookFonts?: boolean;
   viewMode?: "paginated" | "scroll";
   paginatedLayout?: "single" | "double";
 }
@@ -266,6 +267,7 @@ export function useReaderBridge(callbacks: ReaderBridgeCallbacks) {
       paragraphSpacing?: number;
       pageMargin?: number;
       fontTheme?: string;
+      useBookFonts?: boolean;
       viewMode?: string;
       paginatedLayout?: "single" | "double";
       customFontFaceCSS?: string;

diff --git a/packages/app-expo/src/screens/ReaderScreen.tsx b/packages/app-expo/src/screens/ReaderScreen.tsx
@@ -592,6 +592,7 @@ export function ReaderScreen({ route, navigation }: Props) {
         paragraphSpacing: settings.paragraphSpacing,
         pageMargin: settings.pageMargin,
         fontTheme: settings.fontTheme,
+        useBookFonts: settings.useBookFonts,
         viewMode: settings.viewMode,
         paginatedLayout: settings.paginatedLayout,
         customFontFaceCSS: fontCSS,
@@ -1140,6 +1141,7 @@ export function ReaderScreen({ route, navigation }: Props) {
             paragraphSpacing: readSettings.paragraphSpacing,
             pageMargin: readSettings.pageMargin,
             fontTheme: readSettings.fontTheme,
+            useBookFonts: readSettings.useBookFonts,
             viewMode: readSettings.viewMode,
             paginatedLayout: readSettings.paginatedLayout,
           },

diff --git a/packages/app-expo/src/screens/reader/ReaderSettingsPanel.tsx b/packages/app-expo/src/screens/reader/ReaderSettingsPanel.tsx
@@ -186,6 +186,21 @@ export function ReaderSettingsPanel({ visible, readSettings, bookId, onClose, on
               </View>
             </ScrollView>
           </View>
+          {/* Use book fonts */}
+          <View style={s.settingRow}>
+            <View style={s.settingLabelBlock}>
+              <Text style={s.settingLabel}>{t("reader.useBookFonts")}</Text>
+              <Text style={s.settingHint}>{t("reader.useBookFontsDesc")}</Text>
+            </View>
+            <TouchableOpacity
+              style={[s.settingToggleBtn, readSettings.useBookFonts !== false && s.settingToggleBtnActive]}
+              onPress={() => onUpdateSetting("useBookFonts", readSettings.useBookFonts === false)}
+            >
+              <Text style={[s.settingToggleText, readSettings.useBookFonts !== false && s.settingToggleTextActive]}>
+                {readSettings.useBookFonts !== false ? t("settings.enabled") : t("settings.disabled")}
+              </Text>
+            </TouchableOpacity>
+          </View>
           {/* View Mode */}
           <View style={s.settingRow}>
             <Text style={s.settingLabel}>{t("reader.viewMode", "阅读模式")}</Text>

diff --git a/packages/app-expo/src/stores/settings-store.ts b/packages/app-expo/src/stores/settings-store.ts
@@ -47,6 +47,7 @@ const defaultReadSettings: ReadSettings = {
   fontSize: 16,
   lineHeight: 1.6,
   fontTheme: "classic",
+  useBookFonts: true,
   viewMode: "paginated",
   paginatedLayout: "double",
   pageMargin: 40,
@@ -83,14 +84,26 @@ const defaultAIConfig: AIConfig = {
 };
 
 function migrateSettingsState(state: SettingsState): SettingsState {
-  if (state.aiConfig.maxTokens !== 4096) return state;
-  return {
-    ...state,
-    aiConfig: {
-      ...state.aiConfig,
-      maxTokens: defaultAIConfig.maxTokens,
-    },
-  };
+  let next = state;
+  if (next.aiConfig.maxTokens === 4096) {
+    next = {
+      ...next,
+      aiConfig: {
+        ...next.aiConfig,
+        maxTokens: defaultAIConfig.maxTokens,
+      },
+    };
+  }
+  if (next.readSettings?.useBookFonts === undefined) {
+    next = {
+      ...next,
+      readSettings: {
+        ...next.readSettings,
+        useBookFonts: true,
+      },
+    };
+  }
+  return next;
 }
 
 async function fetchModelsFromEndpoint(endpoint: AIEndpoint): Promise<string[]> {

diff --git a/packages/app/src/components/reader/FoliateViewer.tsx b/packages/app/src/components/reader/FoliateViewer.tsx
@@ -2751,6 +2751,7 @@ export const FoliateViewer = forwardRef<FoliateViewerHandle, FoliateViewerProps>
       viewSettings.customFontFamily,
       viewSettings.customFontFaceCSS,
       viewSettings.customFontCssUrls,
+      viewSettings.useBookFonts,
       viewSettings.paragraphSpacing,
       isFixedLayout,
       appTheme,
@@ -3174,6 +3175,17 @@ function getRendererStyles(settings: ViewSettings, theme: AppTheme): string {
   const layoutScale = settings.fontSize / BASELINE_FONT_SIZE;
   const scaledParagraphSpacing = Math.round(settings.paragraphSpacing * layoutScale);
 
+  // When useBookFonts is enabled (default), do not force the reader font
+  // family onto every element so the book's own fonts (e.g. embedded
+  // @font-face families) render where the book specifies them.
+  const bodyStarFontOverride =
+    settings.useBookFonts === false
+      ? `body *:not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *) {
+  font-family: var(--readany-font-family) !important;
+}
+`
+      : "";
+
   return `${settings.customFontFaceCSS ? `/* Custom font faces */\n${settings.customFontFaceCSS}\n\n` : ""}/* Font styles */
 html {
   --theme-bg-color: ${bgColor};
@@ -3192,10 +3204,7 @@ html, body {
   text-size-adjust: none;
 }
 
-body *:not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *) {
-  font-family: var(--readany-font-family) !important;
-}
-
+${bodyStarFontOverride}
 body :not(#__readany_font_size_override):not(svg):not(svg *):not(math):not(math *):not(pre):not(pre *):not(code):not(code *):not(kbd):not(kbd *):not(samp):not(samp *):not(rt):not(rp) {
   font-size: ${settings.fontSize}px !important;
 }

diff --git a/packages/app/src/components/settings/ReadSettings.tsx b/packages/app/src/components/settings/ReadSettings.tsx
@@ -9,6 +9,7 @@ import {
   SelectValue,
 } from "@/components/ui/select";
 import { Slider } from "@/components/ui/slider";
+import { Switch } from "@/components/ui/switch";
 import { useAppStore } from "@/stores/app-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { useFontStore } from "@readany/core/stores";
@@ -94,6 +95,20 @@ export function ReadSettingsPanel() {
             </Select>
           </div>
 
+          {/* Use book fonts */}
+          <div className="flex items-center justify-between pt-1">
+            <div>
+              <span className="text-sm text-foreground">{t("settings.useBookFonts")}</span>
+              <p className="mt-0.5 text-xs text-muted-foreground">
+                {t("settings.useBookFontsDesc")}
+              </p>
+            </div>
+            <Switch
+              checked={readSettings.useBookFonts !== false}
+              onCheckedChange={(checked) => updateReadSettings({ useBookFonts: checked })}
+            />
+          </div>
+
           {/* Font Size */}
           <div>
             <div className="mb-3 flex items-center justify-between">

diff --git a/packages/core/src/i18n/locales/en/reader.json b/packages/core/src/i18n/locales/en/reader.json
@@ -40,6 +40,8 @@
     "fontSize": "Font Size",
     "lineHeight": "Line Height",
     "fontTheme": "Font Theme",
+    "useBookFonts": "Use book fonts",
+    "useBookFontsDesc": "Honor the book's own fonts (e.g. embedded fonts) where specified.",
     "viewMode": "View Mode",
     "paginated": "Paginated",
     "scrollMode": "Scroll",

diff --git a/packages/core/src/i18n/locales/en/settings.json b/packages/core/src/i18n/locales/en/settings.json
@@ -64,6 +64,8 @@
     "fontSize": "Font Size: {{size}}px",
     "lineHeight": "Line Height: {{height}}",
     "fontTheme": "Font Theme",
+    "useBookFonts": "Use book fonts",
+    "useBookFontsDesc": "Honor the book's own fonts (e.g. embedded fonts) where specified.",
     "paragraphSpacing": "Paragraph Spacing",
     "showTopTitleProgress": "Top Title & Progress",
     "showBottomTimeBattery": "Bottom Time & Battery",

diff --git a/packages/core/src/i18n/locales/es/reader.json b/packages/core/src/i18n/locales/es/reader.json
@@ -40,6 +40,8 @@
     "fontSize": "Tamaño de fuente",
     "lineHeight": "Altura de línea",
     "fontTheme": "Tema de fuente",
+    "useBookFonts": "Usar fuentes del libro",
+    "useBookFontsDesc": "Mostrar prioritariamente las fuentes del libro (fuentes incrustadas).",
     "viewMode": "Modo de vista",
     "paginated": "Paginado",
     "scrollMode": "Desplazamiento",

diff --git a/packages/core/src/i18n/locales/es/settings.json b/packages/core/src/i18n/locales/es/settings.json
@@ -64,6 +64,8 @@
     "fontSize": "Tamaño de fuente: {{size}}px",
     "lineHeight": "Altura de línea: {{height}}",
     "fontTheme": "Tema de fuente",
+    "useBookFonts": "Usar fuentes del libro",
+    "useBookFontsDesc": "Mostrar prioritariamente las fuentes del libro (fuentes incrustadas).",
     "paragraphSpacing": "Espaciado entre párrafos",
     "showTopTitleProgress": "Título y progreso superior",
     "showBottomTimeBattery": "Hora y batería inferior",

diff --git a/packages/core/src/i18n/locales/fr/reader.json b/packages/core/src/i18n/locales/fr/reader.json
@@ -40,6 +40,8 @@
     "fontSize": "Taille de police",
     "lineHeight": "Interligne",
     "fontTheme": "Thème de police",
+    "useBookFonts": "Utiliser les polices du livre",
+    "useBookFontsDesc": "Afficher en priorité les polices du livre (polices intégrées).",
     "viewMode": "Mode d'affichage",
     "paginated": "Paginé",
     "scrollMode": "Défilement",

diff --git a/packages/core/src/i18n/locales/fr/settings.json b/packages/core/src/i18n/locales/fr/settings.json
@@ -64,6 +64,8 @@
     "fontSize": "Taille de police : {{size}}px",
     "lineHeight": "Interligne : {{height}}",
     "fontTheme": "Thème de police",
+    "useBookFonts": "Utiliser les polices du livre",
+    "useBookFontsDesc": "Afficher en priorité les polices du livre (polices intégrées).",
     "paragraphSpacing": "Espacement des paragraphes",
     "showTopTitleProgress": "Titre et progression en haut",
     "showBottomTimeBattery": "Heure et batterie en bas",

diff --git a/packages/core/src/i18n/locales/ja/reader.json b/packages/core/src/i18n/locales/ja/reader.json
@@ -40,6 +40,8 @@
     "fontSize": "文字サイズ",
     "lineHeight": "行間",
     "fontTheme": "フォントテーマ",
+    "useBookFonts": "書籍のフォントを使用",
+    "useBookFontsDesc": "書籍内で指定されたフォント（埋め込みフォントなど）を優先表示します。",
     "viewMode": "表示モード",
     "paginated": "ページ送り",
     "scrollMode": "スクロール",

diff --git a/packages/core/src/i18n/locales/ja/settings.json b/packages/core/src/i18n/locales/ja/settings.json
@@ -64,6 +64,8 @@
     "fontSize": "文字サイズ: {{size}}px",
     "lineHeight": "行間: {{height}}",
     "fontTheme": "フォントテーマ",
+    "useBookFonts": "書籍のフォントを使用",
+    "useBookFontsDesc": "書籍内で指定されたフォント（埋め込みフォントなど）を優先表示します。",
     "paragraphSpacing": "段落間隔",
     "showTopTitleProgress": "上部タイトル＆進捗表示",
     "showBottomTimeBattery": "下部時刻＆バッテリー表示",

diff --git a/packages/core/src/i18n/locales/ko/reader.json b/packages/core/src/i18n/locales/ko/reader.json
@@ -40,6 +40,8 @@
     "fontSize": "글꼴 크기",
     "lineHeight": "줄 간격",
     "fontTheme": "글꼴 테마",
+    "useBookFonts": "책의 글꼴 사용",
+    "useBookFontsDesc": "책에 지정된 글꼴(내장 글꼴 등)을 우선 표시합니다.",
     "viewMode": "보기 모드",
     "paginated": "페이지 넘기기",
     "scrollMode": "스크롤",

diff --git a/packages/core/src/i18n/locales/ko/settings.json b/packages/core/src/i18n/locales/ko/settings.json
@@ -64,6 +64,8 @@
     "fontSize": "글꼴 크기: {{size}}px",
     "lineHeight": "줄 간격: {{height}}",
     "fontTheme": "글꼴 테마",
+    "useBookFonts": "책의 글꼴 사용",
+    "useBookFontsDesc": "책에 지정된 글꼴(내장 글꼴 등)을 우선 표시합니다.",
     "paragraphSpacing": "문단 간격",
     "showTopTitleProgress": "상단 제목 및 진행률",
     "showBottomTimeBattery": "하단 시간 및 배터리",

diff --git a/packages/core/src/i18n/locales/zh-TW/reader.json b/packages/core/src/i18n/locales/zh-TW/reader.json
@@ -40,6 +40,8 @@
     "fontSize": "字型大小",
     "lineHeight": "行高",
     "fontTheme": "字型主題",
+    "useBookFonts": "使用書籍字型",
+    "useBookFontsDesc": "優先顯示書籍自帶的字型（如內嵌字型）。",
     "viewMode": "閱讀模式",
     "paginated": "翻頁",
     "scrollMode": "捲動",

diff --git a/packages/core/src/i18n/locales/zh-TW/settings.json b/packages/core/src/i18n/locales/zh-TW/settings.json
@@ -64,6 +64,8 @@
     "fontSize": "字型大小：{{size}}px",
     "lineHeight": "行高：{{height}}",
     "fontTheme": "字型主題",
+    "useBookFonts": "使用書籍字型",
+    "useBookFontsDesc": "優先顯示書籍自帶的字型（如內嵌字型）。",
     "paragraphSpacing": "段落間距",
     "showTopTitleProgress": "頂部標題與進度",
     "showBottomTimeBattery": "底部時間與電量",

diff --git a/packages/core/src/i18n/locales/zh/reader.json b/packages/core/src/i18n/locales/zh/reader.json
@@ -40,6 +40,8 @@
     "fontSize": "字号",
     "lineHeight": "行高",
     "fontTheme": "字体主题",
+    "useBookFonts": "使用书籍字体",
+    "useBookFontsDesc": "优先显示书籍自带的字体（如内嵌字体）。",
     "viewMode": "阅读模式",
     "paginated": "翻页",
     "scrollMode": "滚动",

diff --git a/packages/core/src/i18n/locales/zh/settings.json b/packages/core/src/i18n/locales/zh/settings.json
@@ -64,6 +64,8 @@
     "fontSize": "字体大小：{{size}}px",
     "lineHeight": "行高：{{height}}",
     "fontTheme": "字体主题",
+    "useBookFonts": "使用书籍字体",
+    "useBookFontsDesc": "优先显示书籍自带的字体（如内嵌字体）。",
     "paragraphSpacing": "段落间距",
     "showTopTitleProgress": "顶部标题与进度",
     "showBottomTimeBattery": "底部时间与电量",