diff --git a/lite/proxy_lite.py b/lite/proxy_lite.py
index 310db42..0831691 100644
--- a/lite/proxy_lite.py
+++ b/lite/proxy_lite.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-import sys, os, subprocess, time, ctypes, threading, functools, base64, bisect
+import sys, os, subprocess, time, ctypes, threading, functools, base64, bisect, re
 from pathlib import Path
 
 from PyQt5.QtWidgets import (
@@ -832,8 +832,17 @@ def _is_private_ip(host: str) -> bool:
 _CN_RANGES = None           # 合并排序后的 (start, end) 整数段
 _CN_RANGES_LOADED = False
 _FORCE_PROXY_SUFFIXES = None
+_FORCE_PROXY_EXACT = None
+_FORCE_PROXY_REGEXES = None
 _FORCE_PROXY_LOADED = False
 
+# PAC 数据由 CDN 独立下发；此处保留登录/AI 服务的关键后缀兜底。
+# 即使远端表暂时未更新或不可读，这些域名也不能因解析到中国 CDN IP 而直连。
+_CORE_FORCE_PROXY_SUFFIXES = frozenset((
+    "anthropic.com", "chatgpt.com", "claude.ai", "googlecdn.com",
+    "oaistatic.com", "oaiusercontent.com", "openai.com",
+))
+
 def _data_path(name: str):
     """数据文件路径：只取打包内置目录（config.json 随 exe 内置）。"""
     p = Path(BASE_DIR) / name
@@ -1318,8 +1327,13 @@ def _load_cn_ranges():
     return _CN_RANGES
 
 def _load_force_proxy_suffixes():
-    """加载 pac_domains.json：命中这些域名后缀的连接强制走隧道（优先于 IP 判定）。"""
-    global _FORCE_PROXY_SUFFIXES, _FORCE_PROXY_LOADED
+    """加载 pac_domains.json 的后缀、精确和正则规则。
+
+    domain-list-community 的三种规则语义：普通域名匹配自身及子域；
+    ``full:`` 仅匹配该主机；``regexp:`` 按正则匹配。旧逻辑把后两类
+    当成带冒号的普通后缀，导致它们永远不命中。
+    """
+    global _FORCE_PROXY_SUFFIXES, _FORCE_PROXY_EXACT, _FORCE_PROXY_REGEXES, _FORCE_PROXY_LOADED
     if _FORCE_PROXY_LOADED:
         return _FORCE_PROXY_SUFFIXES
     _FORCE_PROXY_LOADED = True
@@ -1327,14 +1341,51 @@ def _load_force_proxy_suffixes():
         import json
         path = _user_path("pac_domains.json")
         if path is None:
-            return _FORCE_PROXY_SUFFIXES  # 可选文件，缺失不影响 IP 分流
+            _FORCE_PROXY_SUFFIXES = sorted(_CORE_FORCE_PROXY_SUFFIXES)
+            _FORCE_PROXY_EXACT = frozenset()
+            _FORCE_PROXY_REGEXES = ()
+            log(f"未找到 pac_domains.json，使用 {len(_FORCE_PROXY_SUFFIXES)} 条关键域名兜底")
+            return _FORCE_PROXY_SUFFIXES
         data = json.loads(Path(path).read_text("utf-8"))
-        suffixes = sorted({str(d).strip().lower().lstrip("*.")
-                           for d in (data.get("domains") or []) if str(d).strip()})
+        suffixes = set(_CORE_FORCE_PROXY_SUFFIXES)
+        exact = set()
+        regexes = []
+        invalid_regexes = 0
+        for raw in data.get("domains") or []:
+            raw_rule = str(raw).strip()
+            rule = raw_rule.lower()
+            if not raw_rule:
+                continue
+            if rule.startswith("full:"):
+                host = rule[len("full:"):].rstrip(".")
+                if host:
+                    exact.add(host)
+                continue
+            if rule.startswith("regexp:"):
+                # 正则本身可能含大写字符类或大小写敏感字面量；只忽略匹配时的
+                # 域名大小写，不能在编译前改写 pattern。
+                pattern = raw_rule[len("regexp:"):]
+                if not pattern:
+                    invalid_regexes += 1
+                    continue
+                try:
+                    regexes.append(re.compile(pattern, re.IGNORECASE))
+                except re.error:
+                    invalid_regexes += 1
+                continue
+            suffixes.add(rule.lstrip("*.").rstrip("."))
+        suffixes.discard("")
         _FORCE_PROXY_SUFFIXES = suffixes
-        log(f"已加载强制代理域名: {len(suffixes)} 条 (pac_domains.json)")
+        _FORCE_PROXY_EXACT = frozenset(exact)
+        _FORCE_PROXY_REGEXES = tuple(regexes)
+        log(f"已加载强制代理规则: 后缀 {len(suffixes)} 条、精确 {len(exact)} 条、"
+            f"正则 {len(regexes)} 条 (pac_domains.json)" +
+            (f"，跳过 {invalid_regexes} 条非法正则" if invalid_regexes else ""))
     except Exception as e:
         log_red(f"pac_domains.json 加载失败: {e}")
+        _FORCE_PROXY_SUFFIXES = sorted(_CORE_FORCE_PROXY_SUFFIXES)
+        _FORCE_PROXY_EXACT = frozenset()
+        _FORCE_PROXY_REGEXES = ()
     return _FORCE_PROXY_SUFFIXES
 
 def _is_private_int(n: int) -> bool:
@@ -1386,12 +1437,16 @@ def _is_china_ip(host: str):
 
 @functools.lru_cache(maxsize=8192)
 def _is_force_proxy(host: str) -> bool:
-    """pac_domains.json 命中的域名强制走隧道（如 claude.ai：国内可连但显示拒绝页）。"""
+    """PAC 强制规则命中的域名走隧道（后缀 / full / regexp）。"""
     suffixes = _load_force_proxy_suffixes()
-    if not suffixes:
+    exact = _FORCE_PROXY_EXACT or ()
+    regexes = _FORCE_PROXY_REGEXES or ()
+    if not suffixes and not exact and not regexes:
         return False
     h = host.rstrip(".").lower()
-    return any(h == s or h.endswith("." + s) for s in suffixes)
+    return (any(h == s or h.endswith("." + s) for s in suffixes) or
+            h in exact or
+            any(pattern.search(h) is not None for pattern in regexes))
 
 def _resolve_host_ips(host: str):
     """解析域名的 IPv4/IPv6 地址集合（字面量 IP 返回自身）；解析失败返回空集合。"""
@@ -3092,4 +3147,4 @@ def main():
     os._exit(ret)
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()