feat(admin): improve responsive management pages

apps/admin/src/pages/Students/index.tsx

@@ -62,7 +62,6 @@ interface EnrollmentInfo {
   };
 }
 
-
 interface StudentCreateImportResult {
   message?: string;
   imported?: number;
@@ -609,7 +608,11 @@ const StudentsPage: React.FC = () => {
           >
             添加学生
           </PermissionButton>
-          <Upload accept=".xlsx,.xls" showUploadList={false} customRequest={handleCreateStudentsImport}>
+          <Upload
+            accept=".xlsx,.xls"
+            showUploadList={false}
+            customRequest={handleCreateStudentsImport}
+          >
             <Button icon={<UploadOutlined />}>导入Excel</Button>
           </Upload>
           <Upload
@@ -679,9 +682,9 @@ const StudentsPage: React.FC = () => {
             }
             return (
               <Card title="多班型对比" size="small" style={{ margin: '8px 0' }}>
-                <Row gutter={16}>
+                <Row gutter={[16, 16]}>
                   {enrollments.map((enr, idx) => (
-                    <Col span={12} key={enr.classId}>
+                    <Col xs={24} md={12} key={enr.classId}>
                       <Card
                         size="small"
                         title={enr.classType || `班型 ${idx + 1}`}