diff --git a/uninstall.sh b/uninstall.sh
index 4b61277..811cda9 100755
--- a/uninstall.sh
+++ b/uninstall.sh
@@ -1,152 +1,105 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-# More accurate uninstall for clash-for-linux
 SERVICE_NAME="clash-for-linux"
 UNIT_PATH="/etc/systemd/system/${SERVICE_NAME}.service"
+INSTALL_DIR="${CLASH_INSTALL_DIR:-/opt/clash-for-linux}"
 
-RED='\033[31m'
-GREEN='\033[32m'
-YELLOW='\033[33m'
-NC='\033[0m'
-info()  { echo -e "${GREEN}[INFO]${NC} $*"; }
-ok()    { echo -e "${GREEN}[OK]${NC} $*"; }
-warn()  { echo -e "${YELLOW}[WARN]${NC} $*"; }
-err()   { echo -e "${RED}[ERROR]${NC} $*"; }
+CLASHCTL_LINK="/usr/local/bin/clashctl"
+PROFILED_FILE="/etc/profile.d/clash-for-linux.sh"
+
+PURGE=false
+
+for arg in "$@"; do
+  case "$arg" in
+    --purge)
+      PURGE=true
+      ;;
+    *)
+      echo "[ERROR] Unknown arg: $arg" >&2
+      echo "Usage: uninstall.sh [--purge]" >&2
+      exit 2
+      ;;
+  esac
+done
+
+log()   { printf "%b\n" "$*"; }
+ok()    { log "\033[32m[OK]\033[0m $*"; }
+warn()  { log "\033[33m[WARN]\033[0m $*"; }
+err()   { log "\033[31m[ERROR]\033[0m $*"; }
 
 if [ "$(id -u)" -ne 0 ]; then
-  err "需要 root 权限执行卸载脚本（请使用 sudo bash uninstall.sh）"
+  err "需要 root 权限执行卸载"
   exit 1
 fi
 
-# Candidate install dirs:
-# 1) explicit CLASH_INSTALL_DIR
-# 2) working directory if it looks like clash-for-linux
-# 3) service WorkingDirectory / ExecStart path inferred from unit
-# 4) common defaults
-candidates=()
-[ -n "${CLASH_INSTALL_DIR:-}" ] && candidates+=("${CLASH_INSTALL_DIR}")
-PWD_BASENAME="$(basename "${PWD}")"
-if [ "$PWD_BASENAME" = "clash-for-linux" ] && [ -f "${PWD}/start.sh" ]; then
-  candidates+=("${PWD}")
-fi
-
-if [ -f "$UNIT_PATH" ]; then
-  wd="$(sed -nE 's#^WorkingDirectory=(.*)#\1#p' "$UNIT_PATH" | head -n1 || true)"
-  [ -n "$wd" ] && candidates+=("$wd")
-
-  exec_path="$(sed -nE 's#^ExecStart=/bin/bash[[:space:]]+([^[:space:]]+/start\.sh).*#\1#p' "$UNIT_PATH" | head -n1 || true)"
-  if [ -n "$exec_path" ]; then
-    candidates+=("$(dirname "$exec_path")")
-  fi
-fi
-
-candidates+=("/root/clash-for-linux" "/opt/clash-for-linux")
-
-# normalize + uniq + choose first existing dir containing start.sh or shutdown.sh
-INSTALL_DIR=""
-declare -A seen
-for d in "${candidates[@]}"; do
-  [ -n "$d" ] || continue
-  d="${d%/}"
-  [ -n "$d" ] || continue
-  if [ -z "${seen[$d]:-}" ]; then
-    seen[$d]=1
-    if [ -d "$d" ] && { [ -f "$d/start.sh" ] || [ -f "$d/shutdown.sh" ] || [ -d "$d/conf" ]; }; then
-      INSTALL_DIR="$d"
-      break
-    fi
-  fi
-done
-
-if [ -z "$INSTALL_DIR" ]; then
-  warn "未能自动识别安装目录，将按候选路径继续清理 systemd / 环境文件。"
-else
-  info "识别到安装目录: $INSTALL_DIR"
-fi
-
-info "开始卸载 ${SERVICE_NAME} ..."
-
-# 1) graceful stop
-if [ -n "$INSTALL_DIR" ] && [ -f "${INSTALL_DIR}/shutdown.sh" ]; then
-  info "执行 shutdown.sh（优雅停止）..."
-  bash "${INSTALL_DIR}/shutdown.sh" >/dev/null 2>&1 || true
-fi
+echo "[INFO] uninstalling clash-for-linux..."
 
+# =========================
+# 停止服务
+# =========================
 if command -v systemctl >/dev/null 2>&1; then
-  info "停止并禁用 systemd 服务..."
   systemctl stop "${SERVICE_NAME}.service" >/dev/null 2>&1 || true
   systemctl disable "${SERVICE_NAME}.service" >/dev/null 2>&1 || true
 fi
 
-# 2) stop process by pid file from all likely dirs
-for d in "/root/clash-for-linux" "/opt/clash-for-linux" "${INSTALL_DIR:-}"; do
-  [ -n "$d" ] || continue
-  PID_FILE="$d/runtime/clash.pid"
-  if [ -f "$PID_FILE" ]; then
-    PID="$(cat "$PID_FILE" 2>/dev/null || true)"
-    if [ -n "${PID:-}" ] && kill -0 "$PID" 2>/dev/null; then
-      info "检测到 PID=${PID}（来自 $PID_FILE），尝试停止..."
-      kill "$PID" 2>/dev/null || true
-      sleep 1
-      if kill -0 "$PID" 2>/dev/null; then
-        warn "进程仍在运行，强制 kill -9 ${PID}"
-        kill -9 "$PID" 2>/dev/null || true
-      fi
+# =========================
+# 停止进程（仅当前项目）
+# =========================
+PID_FILE="${INSTALL_DIR}/runtime/clash.pid"
+
+if [ -f "$PID_FILE" ]; then
+  PID="$(cat "$PID_FILE" 2>/dev/null || true)"
+
+  if [ -n "${PID:-}" ] && kill -0 "$PID" 2>/dev/null; then
+    echo "[INFO] stopping pid=$PID"
+    kill "$PID" 2>/dev/null || true
+    sleep 1
+
+    if kill -0 "$PID" 2>/dev/null; then
+      echo "[WARN] force kill -9 $PID"
+      kill -9 "$PID" 2>/dev/null || true
     fi
-    rm -f "$PID_FILE" || true
   fi
-done
 
-# 兜底：按完整路径匹配，避免误杀其他 clash
-pkill -f '/clash-for-linux/.*/clash' >/dev/null 2>&1 || true
-pkill -f '/clash-for-linux/.*/mihomo' >/dev/null 2>&1 || true
-sleep 1
-pkill -9 -f '/clash-for-linux/.*/clash' >/dev/null 2>&1 || true
-pkill -9 -f '/clash-for-linux/.*/mihomo' >/dev/null 2>&1 || true
+  rm -f "$PID_FILE"
+fi
 
-# 3) remove unit and related files
+# =========================
+# 删除 systemd
+# =========================
 if [ -f "$UNIT_PATH" ]; then
   rm -f "$UNIT_PATH"
-  ok "已移除 systemd 单元: ${UNIT_PATH}"
-fi
-if [ -d "/etc/systemd/system/${SERVICE_NAME}.service.d" ]; then
-  rm -rf "/etc/systemd/system/${SERVICE_NAME}.service.d"
-  ok "已移除 drop-in: /etc/systemd/system/${SERVICE_NAME}.service.d"
+  ok "removed systemd unit"
 fi
+
 if command -v systemctl >/dev/null 2>&1; then
   systemctl daemon-reload >/dev/null 2>&1 || true
   systemctl reset-failed >/dev/null 2>&1 || true
 fi
 
-# 4) cleanup env / command entry
-rm -f "/etc/default/${SERVICE_NAME}" >/dev/null 2>&1 || true
-rm -f "/etc/profile.d/clash-for-linux.sh" >/dev/null 2>&1 || true
-rm -f "/usr/local/bin/clashctl" >/dev/null 2>&1 || true
-for d in "/root/clash-for-linux" "/opt/clash-for-linux" "${INSTALL_DIR:-}"; do
-  [ -n "$d" ] || continue
-  rm -f "$d/temp/clash-for-linux.sh" >/dev/null 2>&1 || true
-done
+# =========================
+# 删除命令入口
+# =========================
+rm -f "$CLASHCTL_LINK" >/dev/null 2>&1 || true
+rm -f "$PROFILED_FILE" >/dev/null 2>&1 || true
 
-# 5) remove install dirs
-removed_any=false
-for d in "${INSTALL_DIR:-}" "/root/clash-for-linux" "/opt/clash-for-linux"; do
-  [ -n "$d" ] || continue
-  if [ -d "$d" ] && { [ -f "$d/start.sh" ] || [ -d "$d/conf" ] || [ "$d" = "$INSTALL_DIR" ]; }; then
-    rm -rf "$d"
-    ok "已移除安装目录: $d"
-    removed_any=true
+ok "removed command + env"
+
+# =========================
+# 删除安装目录
+# =========================
+if [ "$PURGE" = true ]; then
+  if [ -d "$INSTALL_DIR" ]; then
+    rm -rf "$INSTALL_DIR"
+    ok "removed install dir: $INSTALL_DIR"
+  else
+    warn "install dir not found: $INSTALL_DIR"
   fi
-done
-
-if [ "$removed_any" = false ]; then
-  warn "未发现可删除的安装目录"
+else
+  warn "install dir preserved: $INSTALL_DIR"
+  echo "run with --purge to remove it"
 fi
 
 echo
-warn "如果你曾执行 proxy_on，当前终端可能仍保留代理环境变量。可执行："
-echo "  unset http_proxy https_proxy no_proxy HTTP_PROXY HTTPS_PROXY NO_PROXY"
-echo "  # 或关闭终端重新打开"
-
-echo
-ok "卸载完成 ✅"
+ok "uninstall complete"
\ No newline at end of file