diff --git a/Touchkebao/src/components/GroupContextMenu/index.module.scss b/Touchkebao/src/components/GroupContextMenu/index.module.scss
index 82be8b1d..f9f194bf 100644
--- a/Touchkebao/src/components/GroupContextMenu/index.module.scss
+++ b/Touchkebao/src/components/GroupContextMenu/index.module.scss
@@ -9,10 +9,9 @@
 }
 
 .contextMenu {
-  min-width: 180px;
-  padding: 4px 0;
+  min-width: 120px;
+  padding: 2px 0;
   background: #ffffff;
   border-radius: 6px;
-  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.25);
-  border: 1px solid rgba(148, 163, 184, 0.5);
+  border: 1px solid rgba(148, 163, 184, 0.4);
 }
diff --git a/Touchkebao/src/components/GroupContextMenu/index.tsx b/Touchkebao/src/components/GroupContextMenu/index.tsx
index 81b0e3ba..0136d866 100644
--- a/Touchkebao/src/components/GroupContextMenu/index.tsx
+++ b/Touchkebao/src/components/GroupContextMenu/index.tsx
@@ -49,6 +49,12 @@ export const GroupContextMenu: React.FC<GroupContextMenuProps> = ({
   onEditClick,
   onDeleteClick,
 }) => {
+  // 默认群分组 / 未分组：id 为 0，且 groupType 为 1 或 2
+  const isDefaultOrUngrouped =
+    !!group &&
+    group.id === 0 &&
+    (group.groupType === 1 || group.groupType === 2);
+
   // 处理新增分组
   const handleAdd = () => {
     onClose();
@@ -57,14 +63,14 @@ export const GroupContextMenu: React.FC<GroupContextMenuProps> = ({
 
   // 处理编辑分组
   const handleEdit = () => {
-    if (!group) return;
+    if (!group || isDefaultOrUngrouped) return;
     onClose();
     onEditClick?.(group);
   };
 
   // 处理删除分组
   const handleDelete = () => {
-    if (!group) return;
+    if (!group || isDefaultOrUngrouped) return;
     onClose();
     onDeleteClick?.(group);
   };
@@ -84,6 +90,7 @@ export const GroupContextMenu: React.FC<GroupContextMenuProps> = ({
             label: "编辑分组",
             icon: <EditOutlined />,
             onClick: handleEdit,
+            disabled: isDefaultOrUngrouped,
           },
           {
             key: "delete",
@@ -91,6 +98,7 @@ export const GroupContextMenu: React.FC<GroupContextMenuProps> = ({
             icon: <DeleteOutlined />,
             danger: true,
             onClick: handleDelete,
+            disabled: isDefaultOrUngrouped,
           },
         ]
       : []),
@@ -112,6 +120,7 @@ export const GroupContextMenu: React.FC<GroupContextMenuProps> = ({
           left: x,
           top: y,
           zIndex: 1000,
+          boxShadow: "0 12px 32px rgba(15, 23, 42, 0.32)",
         }}
         items={menuItems}
         onClick={onClose}
diff --git a/Touchkebao/src/store/module/weChat/contacts.new.ts b/Touchkebao/src/store/module/weChat/contacts.new.ts
index 6a7ae7a7..e8e2964c 100644
--- a/Touchkebao/src/store/module/weChat/contacts.new.ts
+++ b/Touchkebao/src/store/module/weChat/contacts.new.ts
@@ -81,10 +81,27 @@ export const useContactStoreNew = createPersistStore<ContactStoreState>(
      * 设置分组列表
      */
     setGroups: async (groups: ContactGroup[]) => {
-      // 按sort排序
-      const sortedGroups = [...groups].sort(
-        (a, b) => (a.sort || 0) - (b.sort || 0),
-      );
+      // 按自定义规则排序：
+      // 1. 默认群分组（groupType=2 且 id=0）始终在最前
+      // 2. 未分组（groupType=1 且 id=99999999）始终在最后
+      // 3. 其他分组按 sort 升序
+      const sortedGroups = [...groups].sort((a, b) => {
+        const isDefaultGroupA = a.groupType === 2 && a.id === 0;
+        const isDefaultGroupB = b.groupType === 2 && b.id === 0;
+        const isUngroupedA = a.groupType === 1 && a.id === 99999999;
+        const isUngroupedB = b.groupType === 1 && b.id === 99999999;
+
+        // 默认群分组始终最前
+        if (isDefaultGroupA && !isDefaultGroupB) return -1;
+        if (!isDefaultGroupA && isDefaultGroupB) return 1;
+
+        // 未分组始终最后
+        if (isUngroupedA && !isUngroupedB) return 1;
+        if (!isUngroupedA && isUngroupedB) return -1;
+
+        // 其他按 sort 排序
+        return (a.sort || 0) - (b.sort || 0);
+      });
       set({ groups: sortedGroups });
 
       // 缓存分组列表