diff --git a/cron_daily.sh b/cron_daily.sh
index 2302180..339ec99 100755
--- a/cron_daily.sh
+++ b/cron_daily.sh
@@ -4,7 +4,48 @@ set -euo pipefail
 PROJECT_DIR="$(cd "$(dirname "$0")" && pwd)"
 cd "$PROJECT_DIR"
 
-if ! command -v bun >/dev/null 2>&1; then
+# Cron 默认 PATH 往往很短，先补一份基础路径。
+export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:${PATH:-}"
+
+resolve_bun() {
+  # 1) PATH 可直接找到 bun
+  if command -v bun >/dev/null 2>&1; then
+    command -v bun
+    return 0
+  fi
+
+  # 2) 允许外部显式指定 BUN_BIN
+  if [[ -n "${BUN_BIN:-}" && -x "${BUN_BIN}" ]]; then
+    echo "${BUN_BIN}"
+    return 0
+  fi
+
+  # 3) 尝试加载 nvm 环境（root 与普通用户路径）
+  local nvm_candidates=("/root/.nvm/nvm.sh" "${HOME:-}/.nvm/nvm.sh")
+  local nvm_sh
+  for nvm_sh in "${nvm_candidates[@]}"; do
+    if [[ -s "${nvm_sh}" ]]; then
+      # shellcheck source=/dev/null
+      source "${nvm_sh}" >/dev/null 2>&1 || true
+      if command -v bun >/dev/null 2>&1; then
+        command -v bun
+        return 0
+      fi
+    fi
+  done
+
+  # 4) 直接扫描 nvm 目录中的 bun，优先版本号最高的 Node 目录
+  local bun_candidates
+  bun_candidates=$(find /root/.nvm/versions/node "${HOME:-}/.nvm/versions/node" -type f -path "*/bin/bun" 2>/dev/null | sort -V || true)
+  if [[ -n "${bun_candidates}" ]]; then
+    echo "${bun_candidates}" | tail -n 1
+    return 0
+  fi
+
+  return 1
+}
+
+if ! BUN_CMD="$(resolve_bun)"; then
   echo "[ERROR] bun 未安装或不在 PATH 中"
   exit 1
 fi
@@ -20,8 +61,9 @@ if [[ ! -d .git ]]; then
 fi
 
 echo "[INFO] 项目目录: $PROJECT_DIR"
+echo "[INFO] bun 路径: $BUN_CMD"
 echo "[INFO] 开始执行 daily 采集..."
-bun run daily
+"$BUN_CMD" run daily
 
 echo "[INFO] 添加产物到暂存区..."
 git add data pic