style: 更新全局样式并移除冗余的checkbox样式

移除notice页面中已不再需要的checkbox样式，同时在全局样式中添加主色调变量定义

+/**
+ * @Date: 2025-06-28 10:33:00
+ * @LastEditors: hookehuyr hookehuyr@gmail.com
+ * @LastEditTime: 2026-01-08 20:14:14
+ * @FilePath: /xyxBooking-weapp/src/app.less
+ * @Description: 全局样式
+ */
+
 @tailwind base;
 @tailwind components;
 @tailwind utilities;
+
+:root {
+    --nut-primary-color: #A67939;
+}

 <!--
  * @Date: 2024-01-15 11:43:01
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2026-01-08 10:44:32
+ * @LastEditTime: 2026-01-08 20:16:02
  * @FilePath: /xyxBooking-weapp/src/pages/notice/index.vue
  * @Description: 文件描述
 -->
@@ -92,8 +92,4 @@ const confirmBtn = () => {
     }
   }
 }
-
-.nut-checkbox__icon {
-  color: #A67939;
-}
 </style>