diff --git a/apps/desktop/build/installer.nsh b/apps/desktop/build/installer.nsh
index 0d7c533..08c82c7 100644
--- a/apps/desktop/build/installer.nsh
+++ b/apps/desktop/build/installer.nsh
@@ -1,3 +1,67 @@
+!ifdef FONT_PACK_COMPANION_FILE
+!ifndef BUILD_UNINSTALLER
+  !include "FileFunc.nsh"
+  !include "nsDialogs.nsh"
+
+  Var fontPackCompanionAvailable
+  Var fontPackCompanionCheckbox
+  Var fontPackCompanionExitCode
+  Var fontPackCompanionHash
+  Var fontPackCompanionPath
+  Var fontPackCompanionSelected
+
+  !macro customInit
+    StrCpy $fontPackCompanionAvailable "0"
+    StrCpy $fontPackCompanionSelected "0"
+    StrCpy $fontPackCompanionPath "$EXEDIR\${FONT_PACK_COMPANION_FILE}"
+    IfFileExists "$fontPackCompanionPath" 0 font_pack_init_done
+      ${StdUtils.HashFile} $fontPackCompanionHash "SHA2-256" "$fontPackCompanionPath"
+      StrCmp $fontPackCompanionHash "${FONT_PACK_COMPANION_SHA256}" 0 font_pack_init_done
+      StrCpy $fontPackCompanionAvailable "1"
+      IfSilent font_pack_silent font_pack_interactive
+      font_pack_interactive:
+        StrCpy $fontPackCompanionSelected "1"
+        Goto font_pack_init_done
+      font_pack_silent:
+        ${GetParameters} $R0
+        ${GetOptions} $R0 "/WITHFONTPACK=" $R1
+        StrCmp $R1 "1" 0 font_pack_init_done
+        StrCpy $fontPackCompanionSelected "1"
+    font_pack_init_done:
+  !macroend
+
+  Function FontPackCompanionPage
+    StrCmp $fontPackCompanionAvailable "1" 0 font_pack_page_skip
+    nsDialogs::Create 1018
+    Pop $R0
+    StrCmp $R0 "error" 0 +2
+      Abort
+    ${NSD_CreateLabel} 0 0 100% 28u "检测到经过完整性校验的可选字体包。安装后，政企公文主题可使用与 PDF 相同的原生中文字体资产。"
+    Pop $R0
+    ${NSD_CreateCheckbox} 0 38u 100% 14u "安装 ${FONT_PACK_COMPANION_NAME}"
+    Pop $fontPackCompanionCheckbox
+    ${NSD_Check} $fontPackCompanionCheckbox
+    nsDialogs::Show
+    Return
+    font_pack_page_skip:
+      Abort
+  FunctionEnd
+
+  Function FontPackCompanionPageLeave
+    ${NSD_GetState} $fontPackCompanionCheckbox $R0
+    StrCmp $R0 ${BST_CHECKED} 0 font_pack_page_unchecked
+      StrCpy $fontPackCompanionSelected "1"
+      Return
+    font_pack_page_unchecked:
+      StrCpy $fontPackCompanionSelected "0"
+  FunctionEnd
+
+  !macro customPageAfterChangeDir
+    Page custom FontPackCompanionPage FontPackCompanionPageLeave
+  !macroend
+!endif
+!endif
+
 !macro customInstall
   WriteRegStr SHCTX \
     "Software\Classes\MarkdownPdfExporter.Markdown" \
@@ -43,6 +107,24 @@
     "" \
     "$INSTDIR\md-to-pdf.exe"
   StrCpy $launchLink "$INSTDIR\md-to-pdf.exe"
+  !ifdef FONT_PACK_COMPANION_FILE
+    StrCmp $fontPackCompanionAvailable "1" 0 font_pack_install_done
+    StrCmp $fontPackCompanionSelected "1" 0 font_pack_install_done
+      ${StdUtils.HashFile} $fontPackCompanionHash "SHA2-256" "$fontPackCompanionPath"
+      StrCmp $fontPackCompanionHash "${FONT_PACK_COMPANION_SHA256}" 0 font_pack_integrity_failed
+      DetailPrint "正在安装可选字体包：${FONT_PACK_COMPANION_NAME}"
+      ExecWait '"$fontPackCompanionPath" /S' $fontPackCompanionExitCode
+      StrCmp $fontPackCompanionExitCode "0" font_pack_install_done
+      DetailPrint "可选字体包安装失败，退出码：$fontPackCompanionExitCode"
+      IfSilent font_pack_install_done 0
+      MessageBox MB_ICONEXCLAMATION|MB_OK "主程序已安装，但可选字体包安装失败（退出码 $fontPackCompanionExitCode）。您可以稍后单独运行字体包安装器。"
+      Goto font_pack_install_done
+    font_pack_integrity_failed:
+      DetailPrint "可选字体包完整性复核失败，已跳过安装。"
+      IfSilent font_pack_install_done 0
+      MessageBox MB_ICONEXCLAMATION|MB_OK "可选字体包完整性复核失败，主程序已安装，但字体包已跳过。"
+    font_pack_install_done:
+  !endif
   System::Call 'shell32::SHChangeNotify(i 0x08000000, i 0, i 0, i 0)'
 !macroend
 
diff --git a/apps/desktop/electron-builder.config.cjs b/apps/desktop/electron-builder.config.cjs
index 60d9bad..d59018b 100644
--- a/apps/desktop/electron-builder.config.cjs
+++ b/apps/desktop/electron-builder.config.cjs
@@ -5,6 +5,8 @@ const windowsIcon = path.resolve(
   __dirname,
   "../../logos/desktop/windows/app.ico"
 );
+const nsisInclude = process.env.MD_TO_PDF_NSIS_INCLUDE?.trim() ||
+  "build/installer.nsh";
 
 module.exports = {
   appId: "com.md-to-pdf.desktop",
@@ -71,7 +73,7 @@ module.exports = {
     installerIcon: windowsIcon,
     uninstallerIcon: windowsIcon,
     installerLanguages: ["zh_CN"],
-    include: "build/installer.nsh",
+    include: nsisInclude,
     artifactName: `md-to-pdf-${version}-x86_64-Setup.\${ext}`
   }
 };
diff --git a/apps/desktop/tests/release-build.test.ts b/apps/desktop/tests/release-build.test.ts
index 01b2d81..7574b1d 100644
--- a/apps/desktop/tests/release-build.test.ts
+++ b/apps/desktop/tests/release-build.test.ts
@@ -58,6 +58,28 @@ describe("桌面发行构建链", () => {
     expect(builderConfig).toContain('to: "samples"');
   });
 
+  it("仅在组合构建时接入经过哈希校验的同目录字体包", () => {
+    const builderConfig = readFileSync(
+      `${desktopRoot}/electron-builder.config.cjs`,
+      "utf8"
+    );
+    const installerInclude = readFileSync(
+      `${desktopRoot}/build/installer.nsh`,
+      "utf8"
+    );
+    const companionBuild = readFileSync(
+      `${projectRoot}/scripts/build-desktop-with-font-pack.mjs`,
+      "utf8"
+    );
+
+    expect(builderConfig).toContain("MD_TO_PDF_NSIS_INCLUDE");
+    expect(installerInclude).toContain("FONT_PACK_COMPANION_SHA256");
+    expect(installerInclude).toContain("StdUtils.HashFile");
+    expect(installerInclude).toContain("/WITHFONTPACK=");
+    expect(companionBuild).toContain("createDesktopCompanionInclude");
+    expect(companionBuild).toContain("MD_TO_PDF_NSIS_INCLUDE");
+  });
+
   it("将 DOCX Lua Filter 复制到桌面主进程资源目录", () => {
     const buildScript = readFileSync(
       `${desktopRoot}/scripts/build-main.mjs`,
diff --git a/docs/PROGRESS.md b/docs/PROGRESS.md
index 46703c4..dfae03e 100644
--- a/docs/PROGRESS.md
+++ b/docs/PROGRESS.md
@@ -323,6 +323,29 @@ FP3 只处理独立 NSIS 字体包、Docker 可选挂载及其安装/升级/卸
 本阶段未修改 NSIS 或 Docker；下一步 FP3-B 实现独立用户级字体包安装、
 升级、卸载和主安装器同目录可选入口。
 
+阶段 12D-FP3-B 已实现 Windows 独立字体包安装与 Desktop 同目录可选入口。
+字体包构建器复用 electron-builder `26.15.3` 锁定并校验的 NSIS 3.0.4.1，
+不要求系统安装 NSIS，也不引入第二套 Electron。独立安装器以当前用户权限
+将完整 `mdtp-serif-sc` ID 安装到
+`%LOCALAPPDATA%/md-to-pdf/font-packs/`，不注册系统字体；安装使用暂存、
+备份、原子提升和失败回滚，同版本重装幂等，独立卸载只清理该 ID。隔离
+根目录验收中，首次静默安装、同版本重装和卸载退出码均为 0，注册器复核
+的字体包指纹仍为
+`67adac137fa74ca54b4ab07dd584ae87657a1aec413b7f125141c5351fa5b89d`。
+
+主安装器通过生成的 NSIS include 绑定同目录字体包安装器的精确文件名与
+SHA-256；交互模式仅在文件存在且哈希正确时显示默认勾选项，并在执行前
+再次复核哈希。静默主安装默认跳过，只有 `/WITHFONTPACK=1` 才安装；字体
+包失败不会回滚主程序。统一组合命令为
+`npm run desktop:make:with-font-pack`，普通 Desktop 构建不启用伴随逻辑。
+真实组合产物中，主安装器为 115,328,133 字节，独立字体包安装器为
+24,489,062 字节；桌面解包目录未包含字体二进制或字体包安装器。Windows
+实机安装向导确认可选页位于安装目录页之后，说明文字完整且字体包默认
+勾选；未执行主程序重装。全仓 465 项测试、类型检查、生产构建和组合发行
+构建通过。下一步 FP3-C 实现 Docker 可选字体包挂载与部署门禁。
+本阶段按版本策略未提前修改应用的 `0.5.1` 版本号；正式 `v0.6.0` 发布
+提交升级版本后，字体包才满足其 `minimumAppVersion=0.6.0` 运行时门禁。
+
 ## 2. 已完成
 
 ### 2.1 项目骨架
@@ -1279,8 +1302,10 @@ ECharts 第二阶段浏览器与 PDF 验证结果：
 - 阶段 12D-FP2：已完成 Preview/PDF WOFF2 与 DOCX 静态 TrueType 的
   同源字体解析、跨端受限资源入口、缓存指纹、降级诊断和真实字体包验证；
 - 阶段 12D-FP3-A：已完成独立字体包构建器、冻结配方、许可证与来源追踪、
-  同版本不可变门禁和真实资产构建；下一步 FP3-B 实现独立 NSIS 字体包，
-  FP3-C 再实现 Docker 可选挂载，最终由 R4 完成 14 套主题深度视觉回归；
+  同版本不可变门禁和真实资产构建；
+- 阶段 12D-FP3-B：已完成独立用户级 NSIS 字体包、原子安装/升级/卸载、
+  主安装器同目录哈希校验和显式静默开关；下一步 FP3-C 实现 Docker 可选
+  挂载，最终由 R4 完成 14 套主题深度视觉回归；
 - 阶段 13：完成 Word/WPS 双向互存、外部主题兼容、体积和正式发布验收。
 
 每个阶段验收通过后创建一个独立提交，再进入下一阶段。当前阶段不得混入
diff --git a/font-packs/README.md b/font-packs/README.md
index 8d212db..164f20c 100644
--- a/font-packs/README.md
+++ b/font-packs/README.md
@@ -45,3 +45,52 @@ root/<pack-id>/<semver>/font-pack.json
 当前 `mdtp-serif-sc@1.0.0` 只替换 `FandolSong` 与
 `Mdpdf Fandol Song` 的 400/700 字重，不匹配 `SimSun` 等通用别名，避免
 错误替换仿宋、黑体、楷体或普通外部主题字体。
+
+## Windows 独立安装器
+
+发布人员可以使用 electron-builder 锁定并校验的 NSIS 工具链构建独立
+字体包安装器，不需要额外安装系统 NSIS：
+
+```powershell
+npm run build:font-pack:windows
+```
+
+默认产物为：
+
+```text
+output/font-packs/windows/
+└── md-to-pdf-font-pack-mdtp-serif-sc-1.0.0-x86_64-Setup.exe
+```
+
+安装器使用当前用户权限，将整个 `mdtp-serif-sc` ID 安装到：
+
+```text
+%LOCALAPPDATA%/md-to-pdf/font-packs/mdtp-serif-sc/1.0.0/
+```
+
+它不向 Windows 系统字体目录注册字体。同一版本重装保持幂等，升级时先把
+该 ID 的现有目录移入备份，再原子提升新版本；失败会回滚。独立卸载项只
+删除安装器拥有的 `mdtp-serif-sc` ID，不影响其他字体包 ID。安装器支持
+`/S` 静默安装和卸载。
+
+## Desktop 伴随发行
+
+组合构建命令为：
+
+```powershell
+npm run desktop:make:with-font-pack
+```
+
+该命令把主安装器和字体包安装器作为两个同目录文件发行。主安装器只编译
+字体包文件名与 SHA-256，不嵌入字体二进制；仅当同目录文件存在且哈希完全
+一致时，交互安装向导才显示默认勾选的字体包选项。字体包失败不回滚已安装
+的主程序。
+
+主安装器静默运行时默认不安装伴随字体包；只有显式传入以下参数才会安装：
+
+```powershell
+md-to-pdf-<version>-x86_64-Setup.exe /S /WITHFONTPACK=1
+```
+
+普通 `npm run make -w @md-to-pdf/desktop` 不启用伴随逻辑，避免本地残留的
+生成文件影响常规桌面构建。
diff --git a/font-packs/windows/font-pack-installer.nsi b/font-packs/windows/font-pack-installer.nsi
new file mode 100644
index 0000000..d657d2d
--- /dev/null
+++ b/font-packs/windows/font-pack-installer.nsi
@@ -0,0 +1,132 @@
+Unicode true
+RequestExecutionLevel user
+SetCompressor /SOLID lzma
+SetCompressorDictSize 64
+
+!include "MUI2.nsh"
+!include "LogicLib.nsh"
+
+!ifndef PACK_DIRECTORY
+  !error "PACK_DIRECTORY is required"
+!endif
+!ifndef PACK_ID
+  !error "PACK_ID is required"
+!endif
+!ifndef PACK_VERSION
+  !error "PACK_VERSION is required"
+!endif
+!ifndef PACK_NAME
+  !error "PACK_NAME is required"
+!endif
+!ifndef PACK_LICENSE_FILE
+  !error "PACK_LICENSE_FILE is required"
+!endif
+!ifndef OUTPUT_FILE
+  !error "OUTPUT_FILE is required"
+!endif
+!ifndef FONT_PACK_ROOT
+  !define FONT_PACK_ROOT "$LOCALAPPDATA\md-to-pdf\font-packs"
+!endif
+!ifndef MANAGER_ROOT
+  !define MANAGER_ROOT "$LOCALAPPDATA\md-to-pdf\font-pack-installers"
+!endif
+
+Name "Markdown PDF 导出器字体包 - ${PACK_NAME}"
+OutFile "${OUTPUT_FILE}"
+InstallDir "${MANAGER_ROOT}\${PACK_ID}"
+ShowInstDetails show
+ShowUninstDetails show
+BrandingText "Markdown PDF 导出器"
+
+!ifdef ICON_FILE
+  Icon "${ICON_FILE}"
+  UninstallIcon "${ICON_FILE}"
+  !define MUI_ICON "${ICON_FILE}"
+  !define MUI_UNICON "${ICON_FILE}"
+!endif
+
+!define MUI_ABORTWARNING
+!insertmacro MUI_PAGE_WELCOME
+!insertmacro MUI_PAGE_LICENSE "${PACK_LICENSE_FILE}"
+!insertmacro MUI_PAGE_INSTFILES
+!insertmacro MUI_PAGE_FINISH
+!insertmacro MUI_UNPAGE_CONFIRM
+!insertmacro MUI_UNPAGE_INSTFILES
+!insertmacro MUI_LANGUAGE "SimpChinese"
+
+VIProductVersion "1.0.0.0"
+VIAddVersionKey /LANG=${LANG_SIMPCHINESE} "ProductName" "Markdown PDF 导出器字体包"
+VIAddVersionKey /LANG=${LANG_SIMPCHINESE} "FileDescription" "${PACK_NAME}"
+VIAddVersionKey /LANG=${LANG_SIMPCHINESE} "FileVersion" "${PACK_VERSION}"
+VIAddVersionKey /LANG=${LANG_SIMPCHINESE} "LegalCopyright" "Copyright © YIXIONG Tech.ltd"
+
+Section "安装字体包" SEC_FONT_PACK
+  SetShellVarContext current
+  StrCpy $R0 "${FONT_PACK_ROOT}\.installing-${PACK_ID}"
+  StrCpy $R1 "${FONT_PACK_ROOT}\${PACK_ID}"
+  StrCpy $R2 "${FONT_PACK_ROOT}\.backup-${PACK_ID}"
+
+  CreateDirectory "${FONT_PACK_ROOT}"
+  RMDir /r "$R0"
+  RMDir /r "$R2"
+  CreateDirectory "$R0\${PACK_ID}\${PACK_VERSION}"
+  SetOutPath "$R0\${PACK_ID}\${PACK_VERSION}"
+  File /r "${PACK_DIRECTORY}\*.*"
+  SetOutPath "$TEMP"
+  IfFileExists "$R0\${PACK_ID}\${PACK_VERSION}\font-pack.json" +3 0
+    RMDir /r "$R0"
+    Abort "字体包暂存校验失败：缺少 font-pack.json"
+
+  ClearErrors
+  IfFileExists "$R1\*.*" 0 promote_pack
+    Rename "$R1" "$R2"
+    IfErrors install_failed
+
+  promote_pack:
+    ClearErrors
+    Rename "$R0\${PACK_ID}" "$R1"
+    IfErrors rollback_pack
+    RMDir /r "$R0"
+    RMDir /r "$R2"
+
+    SetOutPath "$INSTDIR"
+    WriteUninstaller "$INSTDIR\Uninstall.exe"
+    FileOpen $R3 "$INSTDIR\installed-version.txt" w
+    FileWrite $R3 "${PACK_VERSION}$\r$\n"
+    FileClose $R3
+
+    !ifdef REGISTER_UNINSTALL
+      WriteRegStr HKCU "Software\Microsoft\Windows\CurrentVersion\Uninstall\md-to-pdf-font-pack-${PACK_ID}" "DisplayName" "Markdown PDF 导出器字体包 - ${PACK_NAME}"
+      WriteRegStr HKCU "Software\Microsoft\Windows\CurrentVersion\Uninstall\md-to-pdf-font-pack-${PACK_ID}" "DisplayVersion" "${PACK_VERSION}"
+      WriteRegStr HKCU "Software\Microsoft\Windows\CurrentVersion\Uninstall\md-to-pdf-font-pack-${PACK_ID}" "Publisher" "YIXIONG Tech.ltd"
+      WriteRegStr HKCU "Software\Microsoft\Windows\CurrentVersion\Uninstall\md-to-pdf-font-pack-${PACK_ID}" "InstallLocation" "$INSTDIR"
+      WriteRegStr HKCU "Software\Microsoft\Windows\CurrentVersion\Uninstall\md-to-pdf-font-pack-${PACK_ID}" "UninstallString" '"$INSTDIR\Uninstall.exe"'
+      WriteRegDWORD HKCU "Software\Microsoft\Windows\CurrentVersion\Uninstall\md-to-pdf-font-pack-${PACK_ID}" "NoModify" 1
+      WriteRegDWORD HKCU "Software\Microsoft\Windows\CurrentVersion\Uninstall\md-to-pdf-font-pack-${PACK_ID}" "NoRepair" 1
+    !endif
+    Goto install_done
+
+  rollback_pack:
+    RMDir /r "$R1"
+    IfFileExists "$R2\*.*" 0 install_failed
+      Rename "$R2" "$R1"
+
+  install_failed:
+    RMDir /r "$R0"
+    Abort "字体包安装失败，原版本已保留。"
+
+  install_done:
+SectionEnd
+
+Section "Uninstall"
+  SetShellVarContext current
+  RMDir /r "${FONT_PACK_ROOT}\${PACK_ID}"
+  RMDir /r "${FONT_PACK_ROOT}\.installing-${PACK_ID}"
+  RMDir /r "${FONT_PACK_ROOT}\.backup-${PACK_ID}"
+  !ifdef REGISTER_UNINSTALL
+    DeleteRegKey HKCU "Software\Microsoft\Windows\CurrentVersion\Uninstall\md-to-pdf-font-pack-${PACK_ID}"
+  !endif
+  Delete "$INSTDIR\installed-version.txt"
+  Delete "$INSTDIR\Uninstall.exe"
+  RMDir "$INSTDIR"
+SectionEnd
diff --git a/package-lock.json b/package-lock.json
index b075d06..159148c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5631,7 +5631,6 @@
       "integrity": "sha512-O3zJUFUYHJKgzPqioHxfxzBzlSC1eXCSr79gMSBKBP5AgjjpmrydMsMLotEg9fAJF36vdUncb+4ndRNxoPdlSQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "app-builder-lib": "26.15.3",
         "builder-util": "26.15.3",
@@ -10037,6 +10036,7 @@
       },
       "devDependencies": {
         "@types/node": "^24.10.1",
+        "app-builder-lib": "26.15.3",
         "vitest": "^4.1.10"
       }
     },
diff --git a/package.json b/package.json
index 472ce72..bce46d3 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,8 @@
     "desktop:package": "npm run package -w @md-to-pdf/desktop",
     "build:font-pack": "npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/docx-theme-engine && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/font-pack-builder && node packages/font-pack-builder/dist/cli.js build",
     "verify:font-pack": "npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/docx-theme-engine && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/font-pack-builder && node packages/font-pack-builder/dist/cli.js verify",
+    "build:font-pack:windows": "npm run verify:font-pack && node packages/font-pack-builder/dist/cli.js windows-installer",
+    "desktop:make:with-font-pack": "npm run build:font-pack:windows && node scripts/build-desktop-with-font-pack.mjs",
     "theme:import-typora": "node scripts/import-typora-theme.mjs",
     "verify:docx-reference": "npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/docx-engine && npm run verify:pandoc -w @md-to-pdf/docx-engine",
     "verify:docx-conversion": "npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/docx-engine && npm run verify:conversion -w @md-to-pdf/docx-engine",
diff --git a/packages/font-pack-builder/package.json b/packages/font-pack-builder/package.json
index 49febdb..2b60114 100644
--- a/packages/font-pack-builder/package.json
+++ b/packages/font-pack-builder/package.json
@@ -26,6 +26,7 @@
   },
   "devDependencies": {
     "@types/node": "^24.10.1",
+    "app-builder-lib": "26.15.3",
     "vitest": "^4.1.10"
   }
 }
diff --git a/packages/font-pack-builder/src/cli.ts b/packages/font-pack-builder/src/cli.ts
index c759051..4bbfdc2 100644
--- a/packages/font-pack-builder/src/cli.ts
+++ b/packages/font-pack-builder/src/cli.ts
@@ -1,5 +1,6 @@
 import { resolve } from "node:path";
 import { buildFontPack, verifyFontPack } from "./builder.js";
+import { buildWindowsFontPackInstaller } from "./windows-installer.js";
 
 function argumentsMap(values: string[]) {
   const result = new Map<string, string>();
@@ -61,7 +62,31 @@ async function main() {
       packVersion: option(values, "pack-version", "1.0.0")
     });
   }
-  throw new Error("命令必须是 build 或 verify");
+  if (command === "windows-installer") {
+    return buildWindowsFontPackInstaller({
+      packRoot: resolve(option(values, "root", "output/font-packs/root")),
+      appVersion: option(values, "app-version", "0.6.0"),
+      packId: option(values, "pack-id", "mdtp-serif-sc"),
+      packVersion: option(values, "pack-version", "1.0.0"),
+      scriptPath: resolve(
+        option(values, "script", "font-packs/windows/font-pack-installer.nsi")
+      ),
+      outputDirectory: resolve(
+        option(values, "output", "output/font-packs/windows")
+      ),
+      iconPath: resolve(
+        option(values, "icon", "logos/desktop/windows/app.ico")
+      ),
+      reportPath: resolve(
+        option(
+          values,
+          "report",
+          "output/font-packs/windows-installer-report.json"
+        )
+      )
+    });
+  }
+  throw new Error("命令必须是 build、verify 或 windows-installer");
 }
 
 main()
diff --git a/packages/font-pack-builder/src/index.ts b/packages/font-pack-builder/src/index.ts
index 7e69f6a..31f0c40 100644
--- a/packages/font-pack-builder/src/index.ts
+++ b/packages/font-pack-builder/src/index.ts
@@ -1,2 +1,3 @@
 export * from "./builder.js";
 export * from "./recipe.js";
+export * from "./windows-installer.js";
diff --git a/packages/font-pack-builder/src/windows-installer.ts b/packages/font-pack-builder/src/windows-installer.ts
new file mode 100644
index 0000000..218b30e
--- /dev/null
+++ b/packages/font-pack-builder/src/windows-installer.ts
@@ -0,0 +1,219 @@
+import { createHash } from "node:crypto";
+import { spawn } from "node:child_process";
+import { lstat, mkdir, readFile, stat, writeFile } from "node:fs/promises";
+import { basename, dirname, join, resolve } from "node:path";
+import { getMakeNsisPath } from "app-builder-lib/out/toolsets/windows.js";
+import { fontPackManifestSchema } from "@md-to-pdf/font-pack-registry";
+import { verifyFontPack } from "./builder.js";
+
+export const WINDOWS_FONT_PACK_ARCHITECTURE = "x86_64";
+
+export interface BuildWindowsFontPackInstallerOptions {
+  packRoot: string;
+  appVersion: string;
+  packId: string;
+  packVersion: string;
+  scriptPath: string;
+  outputDirectory: string;
+  iconPath?: string;
+  reportPath?: string;
+  fontPackRoot?: string;
+  managerRoot?: string;
+  registerUninstall?: boolean;
+}
+
+export interface WindowsFontPackInstallerReport {
+  packId: string;
+  packVersion: string;
+  artifactPath: string;
+  artifactName: string;
+  bytes: number;
+  sha256: string;
+  nsisPath: string;
+}
+
+export interface CreateDesktopCompanionIncludeOptions {
+  installerPath: string;
+  baseIncludePath: string;
+  outputPath: string;
+  displayName: string;
+}
+
+function sha256(content: Uint8Array) {
+  return createHash("sha256").update(content).digest("hex").toUpperCase();
+}
+
+function assertDefineValue(value: string, label: string) {
+  if (value.includes('"') || value.includes("\r") || value.includes("\n")) {
+    throw new Error(`${label} 包含 NSIS 定义不支持的字符`);
+  }
+  return value;
+}
+
+function define(name: string, value: string) {
+  return `/D${name}=${assertDefineValue(value, name)}`;
+}
+
+export function windowsFontPackInstallerName(packId: string, version: string) {
+  return `md-to-pdf-font-pack-${packId}-${version}-${WINDOWS_FONT_PACK_ARCHITECTURE}-Setup.exe`;
+}
+
+export function createWindowsFontPackInstallerArguments(options: {
+  packDirectory: string;
+  packId: string;
+  packVersion: string;
+  packName: string;
+  licensePath: string;
+  outputPath: string;
+  scriptPath: string;
+  iconPath?: string;
+  fontPackRoot?: string;
+  managerRoot?: string;
+  registerUninstall?: boolean;
+}) {
+  const argumentsList = [
+    "/V2",
+    "/INPUTCHARSET",
+    "UTF8",
+    define("PACK_DIRECTORY", resolve(options.packDirectory)),
+    define("PACK_ID", options.packId),
+    define("PACK_VERSION", options.packVersion),
+    define("PACK_NAME", options.packName),
+    define("PACK_LICENSE_FILE", resolve(options.licensePath)),
+    define("OUTPUT_FILE", resolve(options.outputPath))
+  ];
+  if (options.iconPath) {
+    argumentsList.push(define("ICON_FILE", resolve(options.iconPath)));
+  }
+  if (options.fontPackRoot) {
+    argumentsList.push(define("FONT_PACK_ROOT", resolve(options.fontPackRoot)));
+  }
+  if (options.managerRoot) {
+    argumentsList.push(define("MANAGER_ROOT", resolve(options.managerRoot)));
+  }
+  if (options.registerUninstall !== false) {
+    argumentsList.push("/DREGISTER_UNINSTALL");
+  }
+  argumentsList.push(resolve(options.scriptPath));
+  return argumentsList;
+}
+
+async function runProcess(
+  executable: string,
+  argumentsList: string[],
+  environment?: NodeJS.ProcessEnv
+) {
+  await new Promise<void>((resolvePromise, reject) => {
+    const child = spawn(executable, argumentsList, {
+      env: environment,
+      stdio: "inherit",
+      windowsHide: true
+    });
+    child.once("error", reject);
+    child.once("exit", (code, signal) => {
+      if (code === 0) {
+        resolvePromise();
+      } else {
+        reject(
+          new Error(
+            `NSIS 编译失败：${signal ? `signal ${signal}` : `exit ${code ?? "unknown"}`}`
+          )
+        );
+      }
+    });
+  });
+}
+
+export async function buildWindowsFontPackInstaller(
+  options: BuildWindowsFontPackInstallerOptions
+): Promise<WindowsFontPackInstallerReport> {
+  if (process.platform !== "win32") {
+    throw new Error("字体包 NSIS 安装器只能在 Windows 上构建");
+  }
+  const verified = await verifyFontPack({
+    root: options.packRoot,
+    appVersion: options.appVersion,
+    packId: options.packId,
+    packVersion: options.packVersion
+  });
+  const packDirectory = resolve(verified.outputDirectory);
+  const manifestPath = join(packDirectory, "font-pack.json");
+  const manifest = fontPackManifestSchema.parse(
+    JSON.parse(await readFile(manifestPath, "utf8")) as unknown
+  );
+  const scriptPath = resolve(options.scriptPath);
+  const scriptStatus = await lstat(scriptPath);
+  if (!scriptStatus.isFile() || scriptStatus.isSymbolicLink()) {
+    throw new Error("字体包 NSIS 脚本不是受信任的普通文件");
+  }
+  const outputDirectory = resolve(options.outputDirectory);
+  await mkdir(outputDirectory, { recursive: true });
+  const artifactName = windowsFontPackInstallerName(
+    options.packId,
+    options.packVersion
+  );
+  const artifactPath = join(outputDirectory, artifactName);
+  const nsis = await getMakeNsisPath(null);
+  const argumentsList = createWindowsFontPackInstallerArguments({
+    packDirectory,
+    packId: manifest.id,
+    packVersion: manifest.version,
+    packName: manifest.name,
+    licensePath: join(packDirectory, manifest.licenseFile),
+    outputPath: artifactPath,
+    scriptPath,
+    ...(options.iconPath ? { iconPath: options.iconPath } : {}),
+    ...(options.fontPackRoot ? { fontPackRoot: options.fontPackRoot } : {}),
+    ...(options.managerRoot ? { managerRoot: options.managerRoot } : {}),
+    ...(options.registerUninstall !== undefined
+      ? { registerUninstall: options.registerUninstall }
+      : {})
+  });
+  await runProcess(nsis.path, argumentsList, {
+    ...process.env,
+    ...nsis.env
+  });
+  const artifact = await readFile(artifactPath);
+  const artifactStatus = await stat(artifactPath);
+  const report: WindowsFontPackInstallerReport = {
+    packId: manifest.id,
+    packVersion: manifest.version,
+    artifactPath,
+    artifactName,
+    bytes: artifactStatus.size,
+    sha256: sha256(artifact),
+    nsisPath: nsis.path
+  };
+  if (options.reportPath) {
+    const reportPath = resolve(options.reportPath);
+    await mkdir(dirname(reportPath), { recursive: true });
+    await writeFile(reportPath, `${JSON.stringify(report, null, 2)}\n`, "utf8");
+  }
+  return report;
+}
+
+export async function createDesktopCompanionInclude(
+  options: CreateDesktopCompanionIncludeOptions
+) {
+  const installerPath = resolve(options.installerPath);
+  const status = await lstat(installerPath);
+  if (!status.isFile() || status.isSymbolicLink()) {
+    throw new Error("字体包伴随安装器不是受信任的普通文件");
+  }
+  const installerHash = sha256(await readFile(installerPath));
+  const include = [
+    `!define FONT_PACK_COMPANION_FILE "${assertDefineValue(basename(installerPath), "伴随安装器文件名")}"`,
+    `!define FONT_PACK_COMPANION_SHA256 "${installerHash}"`,
+    `!define FONT_PACK_COMPANION_NAME "${assertDefineValue(options.displayName, "伴随安装器名称")}"`,
+    `!include "${assertDefineValue(resolve(options.baseIncludePath), "基础安装脚本路径")}"`,
+    ""
+  ].join("\n");
+  const outputPath = resolve(options.outputPath);
+  await mkdir(dirname(outputPath), { recursive: true });
+  await writeFile(outputPath, include, "utf8");
+  return {
+    outputPath,
+    installerPath,
+    installerHash
+  };
+}
diff --git a/packages/font-pack-builder/tests/windows-installer.test.ts b/packages/font-pack-builder/tests/windows-installer.test.ts
new file mode 100644
index 0000000..3006373
--- /dev/null
+++ b/packages/font-pack-builder/tests/windows-installer.test.ts
@@ -0,0 +1,89 @@
+import { createHash } from "node:crypto";
+import { mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { fileURLToPath } from "node:url";
+import { afterEach, describe, expect, it } from "vitest";
+import {
+  createDesktopCompanionInclude,
+  createWindowsFontPackInstallerArguments,
+  windowsFontPackInstallerName
+} from "../src/index.js";
+
+const temporaryDirectories: string[] = [];
+const repositoryRoot = fileURLToPath(new URL("../../../", import.meta.url));
+
+afterEach(async () => {
+  await Promise.all(
+    temporaryDirectories.splice(0).map((directory) =>
+      rm(directory, { recursive: true, force: true })
+    )
+  );
+});
+
+describe("Windows 字体包安装器构建", () => {
+  it("保持用户级原子安装和精确卸载边界", async () => {
+    const script = await readFile(
+      join(repositoryRoot, "font-packs", "windows", "font-pack-installer.nsi"),
+      "utf8"
+    );
+    expect(script).toContain(
+      '$LOCALAPPDATA\\md-to-pdf\\font-packs'
+    );
+    expect(script).toContain(".installing-${PACK_ID}");
+    expect(script).toContain(".backup-${PACK_ID}");
+    expect(script).toContain('Rename "$R0\\${PACK_ID}" "$R1"');
+    expect(script).toContain(
+      'RMDir /r "${FONT_PACK_ROOT}\\${PACK_ID}"'
+    );
+    expect(script).not.toContain("Windows\\Fonts");
+  });
+
+  it("生成稳定发行文件名和完整 NSIS 定义", () => {
+    expect(windowsFontPackInstallerName("mdtp-serif-sc", "1.0.0")).toBe(
+      "md-to-pdf-font-pack-mdtp-serif-sc-1.0.0-x86_64-Setup.exe"
+    );
+    const args = createWindowsFontPackInstallerArguments({
+      packDirectory: "C:/pack",
+      packId: "mdtp-serif-sc",
+      packVersion: "1.0.0",
+      packName: "测试字体包",
+      licensePath: "C:/pack/LICENSE.txt",
+      outputPath: "C:/out/setup.exe",
+      scriptPath: "C:/repo/font-pack-installer.nsi",
+      registerUninstall: false
+    });
+    expect(args).toContain("/DPACK_ID=mdtp-serif-sc");
+    expect(args).toContain("/DPACK_VERSION=1.0.0");
+    expect(args.slice(0, 3)).toEqual(["/V2", "/INPUTCHARSET", "UTF8"]);
+    expect(args).not.toContain("/DREGISTER_UNINSTALL");
+    expect(args.at(-1)).toMatch(/font-pack-installer\.nsi$/u);
+  });
+
+  it("生成绑定同目录文件名与 SHA-256 的桌面 include", async () => {
+    const root = await mkdtemp(join(tmpdir(), "mdtp-font-companion-"));
+    temporaryDirectories.push(root);
+    const installer = join(root, "font-setup.exe");
+    const baseInclude = join(root, "installer.nsh");
+    const output = join(root, "generated", "companion.nsh");
+    await Promise.all([
+      writeFile(installer, "installer", "utf8"),
+      writeFile(baseInclude, "!macro customInstall\n!macroend\n", "utf8")
+    ]);
+    const result = await createDesktopCompanionInclude({
+      installerPath: installer,
+      baseIncludePath: baseInclude,
+      outputPath: output,
+      displayName: "测试字体包"
+    });
+    const expected = createHash("sha256")
+      .update("installer")
+      .digest("hex")
+      .toUpperCase();
+    const content = await readFile(output, "utf8");
+    expect(result.installerHash).toBe(expected);
+    expect(content).toContain('FONT_PACK_COMPANION_FILE "font-setup.exe"');
+    expect(content).toContain(`FONT_PACK_COMPANION_SHA256 "${expected}"`);
+    expect(content).toContain(baseInclude);
+  });
+});
diff --git a/scripts/build-desktop-with-font-pack.mjs b/scripts/build-desktop-with-font-pack.mjs
new file mode 100644
index 0000000..1ca3185
--- /dev/null
+++ b/scripts/build-desktop-with-font-pack.mjs
@@ -0,0 +1,71 @@
+import { copyFile, mkdir, readFile } from "node:fs/promises";
+import { spawn } from "node:child_process";
+import { dirname, join, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+import { createDesktopCompanionInclude } from "../packages/font-pack-builder/dist/index.js";
+
+const repositoryRoot = resolve(dirname(fileURLToPath(import.meta.url)), "..");
+const desktopRoot = join(repositoryRoot, "apps", "desktop");
+const desktopManifest = JSON.parse(
+  await readFile(join(desktopRoot, "package.json"), "utf8")
+);
+const fontInstallerName =
+  "md-to-pdf-font-pack-mdtp-serif-sc-1.0.0-x86_64-Setup.exe";
+const fontInstallerPath = join(
+  repositoryRoot,
+  "output",
+  "font-packs",
+  "windows",
+  fontInstallerName
+);
+const generatedInclude = join(
+  repositoryRoot,
+  "output",
+  "font-packs",
+  "desktop-companion.nsh"
+);
+
+await createDesktopCompanionInclude({
+  installerPath: fontInstallerPath,
+  baseIncludePath: join(desktopRoot, "build", "installer.nsh"),
+  outputPath: generatedInclude,
+  displayName: "MdTP 中文宋体兼容包 1.0.0"
+});
+
+const npmCli =
+  process.env.npm_execpath ||
+  join(dirname(process.execPath), "node_modules", "npm", "bin", "npm-cli.js");
+await new Promise((resolvePromise, reject) => {
+  const child = spawn(
+    process.execPath,
+    [npmCli, "run", "make", "-w", "@md-to-pdf/desktop"],
+    {
+      cwd: repositoryRoot,
+      env: {
+        ...process.env,
+        MD_TO_PDF_NSIS_INCLUDE: generatedInclude
+      },
+      stdio: "inherit",
+      windowsHide: true
+    }
+  );
+  child.once("error", reject);
+  child.once("exit", (code, signal) => {
+    if (code === 0) {
+      resolvePromise();
+    } else {
+      reject(
+        new Error(
+          `桌面安装器构建失败：${signal ? `signal ${signal}` : `exit ${code ?? "unknown"}`}`
+        )
+      );
+    }
+  });
+});
+
+const desktopOutput = join(desktopRoot, "out", `v${desktopManifest.version}`);
+await mkdir(desktopOutput, { recursive: true });
+await copyFile(fontInstallerPath, join(desktopOutput, fontInstallerName));
+process.stdout.write(
+  `主安装器与字体包伴随安装器已生成：${desktopOutput}\n`
+);