diff --git a/scripts/ci/compile-ios.sh b/scripts/ci/compile-ios.sh
index d7ecaaa..33512d5 100755
--- a/scripts/ci/compile-ios.sh
+++ b/scripts/ci/compile-ios.sh
@@ -55,6 +55,17 @@ security unlock-keychain -p "$KEYCHAIN_PWD" "$KEYCHAIN"
 echo "${IOS_DIST_CERT_P12_BASE64}" | base64 --decode > "$WORK/dist.p12"
 security import "$WORK/dist.p12" -k "$KEYCHAIN" \
   -P "${IOS_DIST_CERT_PASSWORD:-}" -T /usr/bin/codesign -T /usr/bin/security
+# 补齐证书链：p12 只含叶子证书，独占搜索列表后 login 里的 Apple WWDR 中间证书
+# 不可见会报 errSecInternalComponent(unable to build chain)——把本机已有的
+# WWDR 中间证书（纯公钥）一并导入临时 keychain。
+security find-certificate -a -c "Apple Worldwide Developer Relations" -p \
+  ~/Library/Keychains/login.keychain-db /Library/Keychains/System.keychain \
+  > "$WORK/wwdr.pem" 2>/dev/null || true
+if [ -s "$WORK/wwdr.pem" ]; then
+  security import "$WORK/wwdr.pem" -k "$KEYCHAIN" -T /usr/bin/codesign 2>/dev/null || true
+else
+  echo "WARN: 本机未找到 Apple WWDR 中间证书，签名可能报 unable to build chain" >&2
+fi
 # 允许 codesign 非交互访问私钥
 security set-key-partition-list -S apple-tool:,apple: -k "$KEYCHAIN_PWD" "$KEYCHAIN" >/dev/null
 # 构建期独占搜索列表（fastlane 同款）：只见临时 keychain，隔离本机其他项目的