diff --git a/router/direct-plain.txt b/router/direct-plain.txt
index a1a0a2e..55e6383 100644
--- a/router/direct-plain.txt
+++ b/router/direct-plain.txt
@@ -33,3 +33,18 @@ DOMAIN-SUFFIX,syncthing.net
 IP-CIDR,110.42.0.0/16,no-resolve
 IP-CIDR,43.248.128.0/17,no-resolve
 IP-CIDR,111.170.0.0/16,no-resolve
+DOMAIN-SUFFIX,steampowered.com
+DOMAIN-SUFFIX,steamcommunity.com
+DOMAIN-SUFFIX,steamgames.com
+DOMAIN-SUFFIX,steamusercontent.com
+DOMAIN-SUFFIX,steam-chat.com
+DOMAIN-SUFFIX,steamstatic.com
+DOMAIN-SUFFIX,steamcontent.com
+DOMAIN-KEYWORD,csgo.
+PROCESS-NAME,steam
+PROCESS-NAME,steamwebhelper
+IP-CIDR,162.254.192.0/18,no-resolve
+IP-CIDR,103.10.124.0/23,no-resolve
+IP-CIDR,103.28.54.0/23,no-resolve
+IP-CIDR,146.66.152.0/21,no-resolve
+IP-CIDR,155.133.224.0/19,no-resolve
diff --git a/router/direct-rules.yaml b/router/direct-rules.yaml
index 8b6c273..ee8b9ec 100644
--- a/router/direct-rules.yaml
+++ b/router/direct-rules.yaml
@@ -46,3 +46,18 @@ rules:
   - IP-CIDR,110.42.0.0/16,DIRECT,no-resolve
   - IP-CIDR,43.248.128.0/17,DIRECT,no-resolve
   - IP-CIDR,111.170.0.0/16,DIRECT,no-resolve
+  - DOMAIN-SUFFIX,steampowered.com,DIRECT
+  - DOMAIN-SUFFIX,steamcommunity.com,DIRECT
+  - DOMAIN-SUFFIX,steamgames.com,DIRECT
+  - DOMAIN-SUFFIX,steamusercontent.com,DIRECT
+  - DOMAIN-SUFFIX,steam-chat.com,DIRECT
+  - DOMAIN-SUFFIX,steamstatic.com,DIRECT
+  - DOMAIN-SUFFIX,steamcontent.com,DIRECT
+  - DOMAIN-KEYWORD,csgo.,DIRECT
+  - PROCESS-NAME,steam,DIRECT
+  - PROCESS-NAME,steamwebhelper,DIRECT
+  - IP-CIDR,162.254.192.0/18,DIRECT,no-resolve
+  - IP-CIDR,103.10.124.0/23,DIRECT,no-resolve
+  - IP-CIDR,103.28.54.0/23,DIRECT,no-resolve
+  - IP-CIDR,146.66.152.0/21,DIRECT,no-resolve
+  - IP-CIDR,155.133.224.0/19,DIRECT,no-resolve
diff --git a/tests/test_module_spec.py b/tests/test_module_spec.py
index 270278d..e907766 100644
--- a/tests/test_module_spec.py
+++ b/tests/test_module_spec.py
@@ -203,6 +203,42 @@ class ModuleSpecTests(unittest.TestCase):
             "PROCESS-NAME,OneDrive.exe,DIRECT",
         )
 
+    def test_to_rule_strips_inline_hash_comment_before_classifying_no_resolve(self) -> None:
+        # 回归测试 (b4a4769)：to_rule() 在判断 entry.endswith(',no-resolve') 之前
+        # 没有剥掉行尾 # 注释，导致带 inline 注释的 Akamai Steam CDN 规则
+        # 走错分支，把注释当成 entry 的一部分拼进去，生成 mihomo 解析失败的规则。
+        self.assertEqual(
+            to_rule("IP-CIDR,162.254.192.0/18,no-resolve   # Akamai Steam CDN 主段"),
+            "IP-CIDR,162.254.192.0/18,DIRECT,no-resolve",
+        )
+        # 注释里出现 "no-resolve" 不能误判为 suffix
+        self.assertEqual(
+            to_rule("DOMAIN-SUFFIX,example.com  # 走 no-resolve 路径"),
+            "DOMAIN-SUFFIX,example.com,DIRECT",
+        )
+        # 注释里出现 ",DIRECT" 不能误拼到 proxy 字段
+        self.assertEqual(
+            to_rule("IP-CIDR,10.0.0.0/8  # 不是 DIRECT, 是 REJECT"),
+            "IP-CIDR,10.0.0.0/8,DIRECT",
+        )
+
+    def test_to_rule_preserves_canonical_forms(self) -> None:
+        # 不带注释、不带 no-resolve
+        self.assertEqual(
+            to_rule("DOMAIN-SUFFIX,bilibili.com"),
+            "DOMAIN-SUFFIX,bilibili.com,DIRECT",
+        )
+        # 带 no-resolve、无注释
+        self.assertEqual(
+            to_rule("IP-CIDR,127.0.0.0/8,no-resolve"),
+            "IP-CIDR,127.0.0.0/8,DIRECT,no-resolve",
+        )
+        # 带 no-resolve + 行尾空白
+        self.assertEqual(
+            to_rule("IP-CIDR,127.0.0.0/8,no-resolve   "),
+            "IP-CIDR,127.0.0.0/8,DIRECT,no-resolve",
+        )
+
     def test_clash_verge_script_adds_reachable_direct_dns_fallbacks(self) -> None:
         script = render_script(["PROCESS-NAME,OneDrive.exe"])