分类规则获取接口，为null判断 bug修复

xiejun

2023-10-17 b727fefd8bfb38400aec054df1f45f1174001cb9

 Source/UBCS-WEB/public/cdn/iconfont/index.css

@@ -21,4 +21,3 @@
    text-align: center;
    font-size: 18px;
}