diff --git a/install.sh b/install.sh
index 1e8b540..e6c4051 100644
--- a/install.sh
+++ b/install.sh
@@ -1331,13 +1331,29 @@ progress '下载 bootstrap runtime'
     die 'bootstrap runtime 下载失败；请确认能访问 git.keeper.work Container Registry'
   fi
 validate_bootstrap_runtime_platform() {
-  local bootstrap_image_id runtime_metadata runtime_os runtime_arch runtime_platform
-  bootstrap_image_id=$("${COMPOSE[@]}" --project-directory "$INSTALL_DIR" --env-file "$INSTALL_DIR/.env" -f "$INSTALL_DIR/compose.yaml" images -q app 2>>"$INSTALL_LOG" | tr -d '[:space:]') || die '无法确定 bootstrap runtime 的本地镜像 ID'
-  [[ -n $bootstrap_image_id ]] || die '无法确定 bootstrap runtime 的本地镜像 ID'
-  runtime_metadata=$(docker image inspect --format '{{.Os}}\t{{.Architecture}}' "$bootstrap_image_id" 2>>"$INSTALL_LOG") || die '无法读取 bootstrap runtime 的本地镜像平台元数据'
-  IFS=$'\t' read -r runtime_os runtime_arch <<<"$runtime_metadata"
-  [[ -n $runtime_os && -n $runtime_arch ]] || die 'bootstrap runtime 的本地镜像平台元数据不完整'
-  runtime_platform="$runtime_os/$runtime_arch"
+  local bootstrap_image_expected bootstrap_image_ref bootstrap_image_id runtime_metadata runtime_platform
+  bootstrap_image_expected=${XYMEDIA_BOOTSTRAP_IMAGE:-}
+  if [[ -z $bootstrap_image_expected && -f $INSTALL_DIR/.env ]]; then
+    bootstrap_image_expected=$(awk -F= '$1 == "XYMEDIA_BOOTSTRAP_IMAGE" {sub(/^[^=]*=/, ""); print; exit}' "$INSTALL_DIR/.env")
+  fi
+  bootstrap_image_expected=${bootstrap_image_expected:-git.keeper.work/admin/xymediavault-bootstrap:1}
+  bootstrap_image_ref=$("${COMPOSE[@]}" --project-directory "$INSTALL_DIR" --env-file "$INSTALL_DIR/.env" -f "$INSTALL_DIR/compose.yaml" config --images 2>>"$INSTALL_LOG" | awk -v expected="$bootstrap_image_expected" 'NF && $0 == expected {print; exit}') || true
+  if [[ -z $bootstrap_image_ref ]]; then
+    bootstrap_image_id=$("${COMPOSE[@]}" --project-directory "$INSTALL_DIR" --env-file "$INSTALL_DIR/.env" -f "$INSTALL_DIR/compose.yaml" images -q app 2>>"$INSTALL_LOG" | awk 'NF {print; exit}') || true
+    bootstrap_image_ref=$bootstrap_image_id
+  fi
+  [[ -n $bootstrap_image_ref ]] || die '无法确定 bootstrap runtime 的本地镜像引用或 ID'
+
+  runtime_metadata=$(docker image inspect --format '{{.Os}}/{{.Architecture}}' "$bootstrap_image_ref" 2>>"$INSTALL_LOG" || true)
+  runtime_metadata=${runtime_metadata//$'\r'/}
+  printf 'bootstrap platform detection: ref=%s image-inspect=%s\n' "$bootstrap_image_ref" "${runtime_metadata:-<empty>}" >>"$INSTALL_LOG"
+  if [[ ! $runtime_metadata =~ ^[^/]+/[^/]+$ ]]; then
+    runtime_metadata=$(docker inspect --type image --format '{{.Os}}/{{.Architecture}}' "$bootstrap_image_ref" 2>>"$INSTALL_LOG" || true)
+    runtime_metadata=${runtime_metadata//$'\r'/}
+    printf 'bootstrap platform detection: ref=%s docker-inspect=%s\n' "$bootstrap_image_ref" "${runtime_metadata:-<empty>}" >>"$INSTALL_LOG"
+  fi
+  [[ $runtime_metadata =~ ^[^/]+/[^/]+$ ]] || die 'bootstrap runtime 的本地镜像平台元数据不完整；请查看 install.log 中的 docker image inspect 输出'
+  runtime_platform=$runtime_metadata
   case "$runtime_platform" in
     linux/amd64) runtime_platform=linux-amd64;;
     linux/arm64) runtime_platform=linux-arm64;;