diff --git a/trading_system/binance_client.py b/trading_system/binance_client.py
index cdaae90..ee22128 100644
--- a/trading_system/binance_client.py
+++ b/trading_system/binance_client.py
@@ -282,7 +282,7 @@ class BinanceClient:
         # 连接前刷新API密钥（确保使用最新值，支持热更新）
         # 但如果 API 密钥为空（只用于获取公开行情），则跳过
         if self.api_key and self.api_secret:
-        self._refresh_api_credentials()
+            self._refresh_api_credentials()
         else:
             logger.info("BinanceClient: 使用公开 API（无需认证），只能获取行情数据")
         
@@ -322,7 +322,7 @@ class BinanceClient:
                 
                 # 验证API密钥权限（仅当提供了有效的 API key 时）
                 if self.api_key and self.api_secret:
-                await self._verify_api_permissions()
+                    await self._verify_api_permissions()
                 else:
                     logger.info("✓ 使用公开 API，跳过权限验证（只能获取行情数据）")
 
@@ -755,14 +755,14 @@ class BinanceClient:
                 self._display_to_api_symbol.update(display_to_api)
                 if display_to_api:
                     logger.info(f"已映射 {len(display_to_api)} 个中文/非ASCII交易对到英文 symbol，均可正常下单")
-            logger.info(f"获取到 {len(usdt_pairs)} 个USDT永续合约交易对")
+                logger.info(f"获取到 {len(usdt_pairs)} 个USDT永续合约交易对")
                 # 回写 DB 供下次使用
                 try:
                     await loop.run_in_executor(None, lambda: _save_exchange_info_to_db(exchange_info))
                 except Exception as e:
                     logger.debug("exchange_info 写入 DB 失败: %s", e)
-            return usdt_pairs
-                
+                return usdt_pairs
+
             except asyncio.TimeoutError:
                 if attempt < max_retries:
                     wait_time = attempt * 2  # 递增等待时间：2秒、4秒、6秒
@@ -771,11 +771,11 @@ class BinanceClient:
                 else:
                     logger.error(f"获取交易对失败：{max_retries}次重试后仍然超时")
                     return []
-                    
-        except BinanceAPIException as e:
+
+            except BinanceAPIException as e:
                 logger.error(f"获取交易对失败（API错误）: {e}")
-            return []
-                
+                return []
+
             except Exception as e:
                 if attempt < max_retries:
                     wait_time = attempt * 2
@@ -784,7 +784,7 @@ class BinanceClient:
                 else:
                     logger.error(f"获取交易对失败（未知错误）: {e}")
                     return []
-        
+
         return []  # 所有重试都失败，返回空列表
     
     async def _rate_limited_request(self, endpoint: str, coro):
@@ -870,7 +870,7 @@ class BinanceClient:
                     from .market_ws_leader import KEY_KLINE_PREFIX
                     shared_key = f"{KEY_KLINE_PREFIX}{symbol.upper()}:{interval.lower()}"
                     # 使用较长的 TTL，因为这是共享缓存，多个账号都会使用
-                ttl_map = {
+                    ttl_map = {
                         '1m': 60, '3m': 120, '5m': 180, '15m': 300, '30m': 600,
                         '1h': 900, '2h': 1800, '4h': 3600, '6h': 5400, '8h': 7200, '12h': 10800, '1d': 21600
                     }
@@ -1292,7 +1292,7 @@ class BinanceClient:
                         f"获取持仓: 过滤掉 {len(skipped_low)} 个名义价值 < {min_notional} USDT 的仓位 {skipped_low}，"
                         "与仪表板不一致时可设 POSITION_MIN_NOTIONAL_USDT=0 或更小"
                     )
-            return open_positions
+                return open_positions
             except (asyncio.TimeoutError, BinanceAPIException) as e:
                 last_error = e
                 # 如果是API异常，检查是否是网络相关或服务器错误
@@ -1389,7 +1389,7 @@ class BinanceClient:
             if isinstance(cached, dict) and ("tickSize" not in cached or "pricePrecision" not in cached):
                 logger.info(f"{symbol} symbol_info 缓存缺少 tickSize/pricePrecision，自动刷新一次")
             else:
-            return cached
+                return cached
         # 2. 降级到进程内存（仅当 Redis 不可用时会有数据）
         if symbol in self._symbol_info_cache:
             cached_mem = self._symbol_info_cache[symbol]
@@ -1873,8 +1873,8 @@ class BinanceClient:
                     position = positions[0]
                     # 优先使用 API 返回的 leverage，不再限制必须有持仓
                     leverage_bracket = position.get('leverage')
-                        if leverage_bracket:
-                            current_leverage = int(leverage_bracket)
+                    if leverage_bracket:
+                        current_leverage = int(leverage_bracket)
             except Exception as e:
                 logger.debug(f"无法获取 {symbol} 的杠杆信息，使用默认值: {current_leverage}x ({e})")
             
@@ -2099,7 +2099,7 @@ class BinanceClient:
                 if reduce_only:
                     logger.warning(f"下单被拒绝 {symbol} {side}: ReduceOnly(-2022)（可能仓位已为0/方向腿不匹配），将由上层做幂等处理")
                 else:
-                logger.error(f"下单失败 {symbol} {side}: ReduceOnly 订单被拒绝 - {e}")
+                    logger.error(f"下单失败 {symbol} {side}: ReduceOnly 订单被拒绝 - {e}")
             elif "reduceOnly" in error_msg.lower() or "reduce only" in error_msg.lower():
                 logger.error(f"下单失败 {symbol} {side}: ReduceOnly 相关错误 - {e}")
                 logger.error(f"  错误码: {error_code}")
@@ -2677,8 +2677,8 @@ class BinanceClient:
                 else:
                     logger.error(f"设置杠杆请求超时 ({symbol} {target_leverage}x)，已重试 2 次仍失败")
                     return 0
-        except BinanceAPIException as e:
-            error_msg = str(e).lower()
+            except BinanceAPIException as e:
+                error_msg = str(e).lower()
                 logger.warning(f"设置杠杆 {target_leverage}x 失败: {e}，尝试降低杠杆...")
                 # 如果是 leverage 相关错误，尝试降级
                 if 'leverage' in error_msg or 'invalid' in error_msg or 'max' in error_msg:
@@ -2687,12 +2687,12 @@ class BinanceClient:
                             continue
                         try:
                             await self.client.futures_change_leverage(symbol=symbol, leverage=fallback)
-                        logger.warning(
+                            logger.warning(
                                 f"{symbol} 杠杆降级成功: {target_leverage}x -> {fallback}x"
                             )
                             return fallback
                         except (TimeoutError, asyncio.TimeoutError, BinanceAPIException):
-                        continue
+                            continue
                 logger.error(f"设置杠杆最终失败: {symbol} (目标: {target_leverage}x)")
                 return 0