diff --git a/volc_limit_sync.py b/volc_limit_sync.py
index fabc4cb..e042841 100644
--- a/volc_limit_sync.py
+++ b/volc_limit_sync.py
@@ -1265,7 +1265,11 @@ def active_monitor_loop():
             elif global_min_remaining < 800_000:
                 base_interval = 2700  # 45 minutes
             else:
-                base_interval = 3600  # 60 minutes
+                # 高水位档收紧（原 60 分钟）：日返还模型下余额 ≥80万 是默认状态
+                #（消耗任务维持的 2M 启动资金），60 分钟同步会让"返还解锁"与
+                #"余额扣减"检测延迟 ≤60 分钟（额度空转 / 扣费窗口）。
+                # 真正的慢同步条件 = is_idle（无用量），由下方 base*4 处理。上限 30 分钟。
+                base_interval = 1800  # 30 minutes
 
             if is_idle:
                 current_sync_interval = min(base_interval * 4, 3600)
@@ -1462,9 +1466,10 @@ def active_monitor_loop():
                             200000  # Pretend we have some quota to get ~5min interval
                         )
                     else:
-                        # Afternoon/Night: Unlikely to reset
+                        # 返还"不定时"（可能下午到账）：All Dead 不能睡 60 分钟，
+                        # 否则额度到账后最多空转 60 分钟才解锁。收紧到 30 分钟。
                         global_min_remaining = (
-                            1000000  # Pretend high quota to sleep 60m
+                            300000  # 30-minute sync while waiting for reset
                         )
                 else:
                     global_min_remaining = temp_min_remaining
@@ -1474,31 +1479,20 @@ def active_monitor_loop():
                     last_usage_map[m] = u_val
                 last_sync_time = now
 
-                if global_min_remaining > 800000:
-                    print(
-                        f"🌊 High Tide Mode: Sleeping for 60m (Effective Min Rem: {int(global_min_remaining):,}) / 高水位模式：休眠 60 分钟",
-                        flush=True,
-                    )
-                elif global_min_remaining > 500000:
-                    print(
-                        f"🌊 Normal Mode: Sleeping for 30m (Min Rem: {int(global_min_remaining):,}) / 正常模式：休眠 30 分钟",
-                        flush=True,
-                    )
-                elif global_min_remaining > 300000:
-                    print(
-                        f"🚤 Speed Mode: Sleeping for 10m (Min Rem: {int(global_min_remaining):,}) / 极速模式：休眠 10 分钟",
-                        flush=True,
-                    )
-                elif global_min_remaining > 100000:
-                    print(
-                        f"⛵ Safe Sailing Mode: Sleeping for 5m (Min Rem: {int(global_min_remaining):,}) / 安全航行模式：休眠 5 分钟",
-                        flush=True,
-                    )
+                if global_min_remaining <= 100000:
+                    mode_icon = "🆘 紧急模式"
+                elif global_min_remaining <= 300000:
+                    mode_icon = "⛵ 安全航行模式"
+                elif global_min_remaining <= 500000:
+                    mode_icon = "🚤 极速模式"
+                elif global_min_remaining <= 800000:
+                    mode_icon = "🌊 正常模式"
                 else:
-                    print(
-                        f"🆘 Emergency Mode: Sleeping for 2m (Min Rem: {int(global_min_remaining):,}) / 紧急模式：休眠 2 分钟",
-                        flush=True,
-                    )
+                    mode_icon = "🌊 高水位模式"
+                print(
+                    f"{mode_icon}: 下一次同步 {current_sync_interval}s (Min Rem: {int(global_min_remaining):,}) / 同步间隔 {current_sync_interval}s",
+                    flush=True,
+                )
 
         except Exception as e:
             print(f"Error in monitor loop / 监控循环出错: {e}", flush=True)