diff --git a/.gitea/workflows/build-windows-msys2-release.yml b/.gitea/workflows/build-windows-msys2-release.yml
new file mode 100644
index 0000000..8c8f6b1
--- /dev/null
+++ b/.gitea/workflows/build-windows-msys2-release.yml
@@ -0,0 +1,180 @@
+name: Build Windows Release with MSYS2
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build-windows-msys2:
+    # 需要 Gitea act_runner 运行在 Windows，并且能访问 GitHub 以拉取 actions/checkout、msys2/setup-msys2、actions/upload-artifact。
+    # 如果你的 runner 使用了自定义标签，可以在 Gitea runner 配置中给它同时加上 windows 标签。
+    runs-on:
+      - windows
+
+    defaults:
+      run:
+        shell: msys2 {0}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup MSYS2 build environment
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: UCRT64
+          update: true
+          install: >-
+            git
+            curl
+            zip
+            p7zip
+            mingw-w64-ucrt-x86_64-toolchain
+            mingw-w64-ucrt-x86_64-cmake
+            mingw-w64-ucrt-x86_64-ninja
+            mingw-w64-ucrt-x86_64-qt6-base
+            mingw-w64-ucrt-x86_64-opencv
+
+      - name: Configure
+        run: |
+          set -euo pipefail
+          cmake -S . -B build-windows-msys2 -G Ninja \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DCMAKE_PREFIX_PATH=/ucrt64
+
+      - name: Build
+        run: |
+          set -euo pipefail
+          cmake --build build-windows-msys2 --parallel "$(nproc)"
+
+      - name: Package
+        run: |
+          set -euo pipefail
+          APP_NAME="chengnan"
+          PACKAGE_NAME="chengnan-windows-x86_64-msys2"
+          PACKAGE_DIR="dist-windows-msys2/${PACKAGE_NAME}"
+          EXE="build-windows-msys2/${APP_NAME}.exe"
+
+          test -f "$EXE"
+          rm -rf dist-windows-msys2
+          mkdir -p "$PACKAGE_DIR"
+          cp "$EXE" "$PACKAGE_DIR/"
+
+          # 部署 Qt 运行时和插件。
+          if command -v windeployqt >/dev/null 2>&1; then
+            windeployqt --release --no-translations "$PACKAGE_DIR/${APP_NAME}.exe"
+          elif command -v windeployqt6 >/dev/null 2>&1; then
+            windeployqt6 --release --no-translations "$PACKAGE_DIR/${APP_NAME}.exe"
+          else
+            echo "windeployqt not found" >&2
+            exit 1
+          fi
+
+          # 收集 MinGW/MSYS2/OpenCV 运行时 DLL。ldd 会列出 exe/dll 依赖；循环几轮收集二级依赖。
+          for round in 1 2 3; do
+            while IFS= read -r binary; do
+              while IFS= read -r dll; do
+                [ -f "$dll" ] || continue
+                cp -n "$dll" "$PACKAGE_DIR/" || true
+              done < <(ldd "$binary" \
+                | awk '/=> \/ucrt64\/bin\// {print $3} /^\/ucrt64\/bin\// {print $1}' \
+                | sort -u)
+            done < <(find "$PACKAGE_DIR" -maxdepth 2 -type f \( -name '*.exe' -o -name '*.dll' \) | sort)
+          done
+
+          cat > "$PACKAGE_DIR/README.txt" <<'EOF'
+          chengnan Windows x86_64 MSYS2 发布包
+
+          运行方式：
+          1. 解压整个目录。
+          2. 双击 chengnan.exe 运行。
+
+          说明：
+          - 本目录由 Windows Runner 使用 MSYS2 UCRT64 构建生成。
+          - 本目录已包含 Qt、OpenCV 和 MinGW 运行时 DLL。
+          - 请不要只复制 chengnan.exe，需保留同目录 DLL 和 Qt plugins 子目录。
+          EOF
+
+          (cd dist-windows-msys2 && 7z a -tzip "${PACKAGE_NAME}.zip" "${PACKAGE_NAME}" >/dev/null)
+          (cd dist-windows-msys2 && sha256sum "${PACKAGE_NAME}.zip" > "${PACKAGE_NAME}.zip.sha256")
+
+          # 当前 Gitea 上传入口约 60 秒会返回 502；大文件按 15 MiB 分片上传。
+          ZIP="dist-windows-msys2/${PACKAGE_NAME}.zip"
+          split -b 15M -d -a 3 "$ZIP" "${ZIP}.part-"
+          (cd dist-windows-msys2 && sha256sum "${PACKAGE_NAME}.zip".part-* > "${PACKAGE_NAME}.zip.parts.sha256")
+          du -h "$ZIP" "${ZIP}".part-*
+
+      - name: Verify package
+        run: |
+          set -euo pipefail
+          test -s dist-windows-msys2/chengnan-windows-x86_64-msys2.zip
+          test -s dist-windows-msys2/chengnan-windows-x86_64-msys2.zip.part-000
+          test -s dist-windows-msys2/chengnan-windows-x86_64-msys2.zip.sha256
+          test -s dist-windows-msys2/chengnan-windows-x86_64-msys2.zip.parts.sha256
+          (cd dist-windows-msys2 && sha256sum -c chengnan-windows-x86_64-msys2.zip.sha256)
+          (cd dist-windows-msys2 && sha256sum -c chengnan-windows-x86_64-msys2.zip.parts.sha256)
+          7z l dist-windows-msys2/chengnan-windows-x86_64-msys2.zip | grep 'chengnan.exe'
+          limit=$((20 * 1024 * 1024))
+          for part in dist-windows-msys2/chengnan-windows-x86_64-msys2.zip.part-*; do
+            size="$(wc -c < "$part")"
+            echo "$(basename "$part") $size"
+            if [ "$size" -gt "$limit" ]; then
+              echo "$part is too large for the current Gitea upload path" >&2
+              exit 1
+            fi
+          done
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: chengnan-windows-x86_64-msys2
+          path: |
+            dist-windows-msys2/chengnan-windows-x86_64-msys2.zip
+            dist-windows-msys2/chengnan-windows-x86_64-msys2.zip.sha256
+            dist-windows-msys2/chengnan-windows-x86_64-msys2.zip.part-*
+            dist-windows-msys2/chengnan-windows-x86_64-msys2.zip.parts.sha256
+          if-no-files-found: error
+
+      - name: Upload package to Gitea Packages
+        if: ${{ github.event_name != 'pull_request' }}
+        env:
+          PACKAGE_TOKEN: ${{ secrets.PACKAGE_TOKEN }}
+        run: |
+          set -euo pipefail
+          PACKAGE_NAME="chengnan-windows-x86_64-msys2"
+          VERSION="${GITHUB_SHA:-manual}"
+          VERSION="${VERSION:0:10}"
+          OWNER="${GITHUB_REPOSITORY%%/*}"
+          API_BASE="${GITHUB_SERVER_URL:-https://git.luochen570.cn}/api/packages/${OWNER}/generic/chengnan/${VERSION}"
+          TOKEN="${PACKAGE_TOKEN:-${GITHUB_TOKEN:-}}"
+          test -n "$TOKEN"
+          upload_file() {
+            local src="$1"
+            local url="$2"
+            local status
+            status="$(curl --show-error --silent --location \
+              --header "Authorization: token ${TOKEN}" \
+              --upload-file "$src" \
+              --write-out '%{http_code}' \
+              --output /tmp/gitea-upload-response.txt \
+              "$url")"
+            if [ "$status" != "201" ] && [ "$status" != "200" ]; then
+              echo "Upload failed with HTTP ${status}: ${url}" >&2
+              cat /tmp/gitea-upload-response.txt >&2
+              exit 1
+            fi
+          }
+          for part in dist-windows-msys2/${PACKAGE_NAME}.zip.part-*; do
+            upload_file "$part" "${API_BASE}/$(basename "$part")"
+          done
+          upload_file "dist-windows-msys2/${PACKAGE_NAME}.zip.sha256" "${API_BASE}/${PACKAGE_NAME}.zip.sha256"
+          upload_file "dist-windows-msys2/${PACKAGE_NAME}.zip.parts.sha256" "${API_BASE}/${PACKAGE_NAME}.zip.parts.sha256"
+          echo "Package uploaded to: ${API_BASE}/"
+          echo "Download all ${PACKAGE_NAME}.zip.part-* files, then reconstruct with: cat ${PACKAGE_NAME}.zip.part-* > ${PACKAGE_NAME}.zip"