diff --git a/lite/proxy_lite.py b/lite/proxy_lite.py
index 9757e26..1d5f1cb 100644
--- a/lite/proxy_lite.py
+++ b/lite/proxy_lite.py
@@ -539,9 +539,60 @@ def _user_path(name: str):
         return p
     return _data_path(name)
 
+# ── 本地设置（settings.json，用户数据目录，明文） ─────────────
+
+def _settings_path():
+    return _USER_DIR / "settings.json"
+
+def _settings_load():
+    """读取本地设置；缺失或损坏返回空字典。"""
+    try:
+        import json
+        f = _settings_path()
+        if not f.is_file():
+            return {}
+        data = json.loads(f.read_text("utf-8"))
+        return data if isinstance(data, dict) else {}
+    except Exception:
+        return {}
+
+def _settings_save(data):
+    """本地设置原子写回。"""
+    import json
+    _USER_DIR.mkdir(parents=True, exist_ok=True)
+    tmp = _settings_path().with_suffix(".json.tmp")
+    tmp.write_text(json.dumps(data, ensure_ascii=False, indent=2) + "\n", "utf-8")
+    os.replace(tmp, _settings_path())
+
+def _parse_port(text):
+    """解析端口号；非法（非数字或超出 1-65535）返回 None。"""
+    try:
+        port = int(str(text).strip())
+    except (TypeError, ValueError):
+        return None
+    return port if 1 <= port <= 65535 else None
+
+def _port_val():
+    """代理转发端口：本地设置 > 内置 config.json > 默认 1080。"""
+    port = _parse_port(_settings_load().get("local_port"))
+    if port is not None:
+        return port
+    port = _parse_port(_config_val("local_port", 1080))
+    return port if port is not None else 1080
+
+def _set_local_port(port):
+    """更新代理转发端口并写回设置文件（下次开启代理生效）。"""
+    global _TLS_LOCAL_PORT, PROXY_PORT
+    _TLS_LOCAL_PORT = port
+    PROXY_PORT = port
+    data = _settings_load()
+    data["local_port"] = port
+    _settings_save(data)
+    log(f"代理转发端口已保存: {port}（下次开启代理生效）")
+
 # 以下模块级取值需在 _data_path 定义之后执行
 VERSION = _config_val("version", "999908162319")
-_TLS_LOCAL_PORT = int(_config_val("local_port", 1080))  # 本地转发器监听端口
+_TLS_LOCAL_PORT = _port_val()  # 本地转发器监听端口（设置 > 内置 config > 1080）
 PROXY_PORT = _TLS_LOCAL_PORT
 
 # ── PAC 数据在线更新（CDN 直连，无需认证） ─────────────
@@ -1315,16 +1366,24 @@ class LoginDialog(QDialog):
 # ── 设置弹窗 ─────────────────────────────────────────
 
 class SettingsDialog(QDialog):
-    """设置弹窗（当前仅含退出登录：清除凭据与本地节点配置）。"""
+    """设置弹窗：代理转发端口 + 退出登录。"""
 
-    def __init__(self, parent=None):
+    def __init__(self, parent=None, port_locked=False):
         super().__init__(parent)
         self.setWindowTitle("设置")
         self.setWindowIcon(load_icon())
-        self.setFixedSize(280, 150)
+        self.setFixedSize(300, 230)
         self.setStyleSheet(f"""
             QDialog {{ background-color: {C_BG}; }}
             QLabel {{ color: {C_TEXT}; font-family: "Microsoft YaHei", "Segoe UI", sans-serif; font-size: 12px; }}
+            QLineEdit {{
+                background-color: {C_CARD};
+                border: 1px solid {C_BORDER};
+                border-radius: 6px;
+                padding: 5px 8px;
+                color: {C_TEXT};
+                font-size: 12px;
+            }}
         """)
 
         layout = QVBoxLayout(self)
@@ -1336,12 +1395,42 @@ class SettingsDialog(QDialog):
         title.setAlignment(Qt.AlignCenter)
         layout.addWidget(title)
 
+        # 代理转发端口
+        port_row = QHBoxLayout()
+        port_lab = QLabel("代理转发端口")
+        port_lab.setStyleSheet(f"color: {C_SUBTEXT}; font-size: 12px;")
+        port_row.addWidget(port_lab)
+        port_row.addStretch()
+        self.ed_port = QLineEdit(str(_TLS_LOCAL_PORT))
+        self.ed_port.setFixedWidth(80)
+        self.ed_port.setEnabled(not port_locked)
+        port_row.addWidget(self.ed_port)
+        layout.addLayout(port_row)
+
+        self.lb_port = QLabel("代理运行中，关闭代理后可修改" if port_locked else "保存后下次开启代理生效")
+        self.lb_port.setStyleSheet(f"color: {C_SUBTEXT}; font-size: 11px;")
+        self.lb_port.setFixedHeight(14)
+        layout.addWidget(self.lb_port)
+
+        btn_save = QPushButton("保存端口")
+        btn_save.setStyleSheet(f"""
+            QPushButton {{
+                background-color: {C_GREEN}; color: #fff; border: none;
+                border-radius: 6px; padding: 5px 14px;
+                font-size: 12px; font-weight: bold;
+            }}
+            QPushButton:disabled {{ background-color: #2a3a2e; color: #666; }}
+        """)
+        btn_save.setEnabled(not port_locked)
+        btn_save.clicked.connect(self._save_port)
+        layout.addWidget(btn_save)
+
         btn_logout = QPushButton("退出登录")
         btn_logout.setStyleSheet(f"""
             QPushButton {{
                 background-color: {C_CARD}; color: {C_RED};
                 border: 1px solid {C_RED}; border-radius: 6px;
-                padding: 7px 16px; font-size: 13px;
+                padding: 5px 14px; font-size: 12px;
             }}
             QPushButton:hover {{ background-color: #ffecec; }}
         """)
@@ -1351,6 +1440,17 @@ class SettingsDialog(QDialog):
 
         layout.addStretch()
 
+    def _save_port(self):
+        port = _parse_port(self.ed_port.text())
+        if port is None:
+            self.lb_port.setText("端口应为 1-65535 的数字")
+            self.lb_port.setStyleSheet(f"color: {C_RED}; font-size: 11px;")
+            return
+        _set_local_port(port)
+        self.ed_port.setText(str(port))
+        self.lb_port.setText(f"已保存: {port}，下次开启代理生效")
+        self.lb_port.setStyleSheet(f"color: {C_GREEN}; font-size: 11px;")
+
     def _logout(self):
         """退出登录：删除加密凭据与本地节点配置，清空内存缓存。"""
         global _NODES
@@ -1734,8 +1834,8 @@ class MainWindow(QWidget):
 
     # ── 设置 ──
     def _show_settings_dialog(self):
-        """打开设置弹窗；退出登录后刷新节点标题。"""
-        SettingsDialog(self).exec_()
+        """打开设置弹窗（代理运行中锁定端口修改）；退出登录后刷新节点标题。"""
+        SettingsDialog(self, port_locked=self._proxy_set_by_us).exec_()
         self._refresh_subtitle()
 
     # ── 节点登录 ──