diff --git a/web/app/controllers/groups.php b/web/app/controllers/groups.php
index 69e9fcf..d29e204 100644
--- a/web/app/controllers/groups.php
+++ b/web/app/controllers/groups.php
@@ -11,9 +11,9 @@
     	become403Page();
     }
 
-	if (!isset($_COOKIE['bootstrap4'])) {
-		$REQUIRE_LIB['bootstrap5'] = '';
-	}
+    if (!isset($_COOKIE['bootstrap4'])) {
+    	$REQUIRE_LIB['bootstrap5'] = '';
+    }
 
     if (isSuperUser($myUser)) {
     	$new_group_form = new UOJForm('new_group');
@@ -34,19 +34,19 @@
     	echo '<td>';
     	echo '#', $group['group_id'], '</td>';
 
-		if (isset($REQUIRE_LIB['bootstrap5'])) {
-			echo '<td class="text-start">';
-		} else {
-			echo '<td class="text-left">';
-		}
+    	if (isset($REQUIRE_LIB['bootstrap5'])) {
+    		echo '<td class="text-start">';
+    	} else {
+    		echo '<td class="text-left">';
+    	}
     	if ($group['is_hidden']) {
     		echo ' <span class="text-danger">[隐藏]</span> ';
     	}
     	echo '<a ';
-		if (isset($REQUIRE_LIB['bootstrap5'])) {
-			echo ' class="text-decoration-none" ';
-		}
-		echo ' href="/group/', $group['group_id'], '">', $group['title'], '</a>';
+    	if (isset($REQUIRE_LIB['bootstrap5'])) {
+    		echo ' class="text-decoration-none" ';
+    	}
+    	echo ' href="/group/', $group['group_id'], '">', $group['title'], '</a>';
     	echo '</td>';
 
     	echo "<td>{$group['user_count']}</td>";
@@ -94,23 +94,23 @@ EOD;
 
     $from = "`groups` a left join groups_users b on a.id = b.group_id";
 
-	$table_config = array('page_len' => 40,
-		'table_classes' => array('table', 'table-bordered', 'table-hover', 'table-striped'),
-		'head_pagination' => true,
-		'pagination_table' => "`groups`"
-	);
+    $table_config = array('page_len' => 40,
+    	'table_classes' => array('table', 'table-bordered', 'table-hover', 'table-striped'),
+    	'head_pagination' => true,
+    	'pagination_table' => "`groups`"
+    );
 
-	if (isset($REQUIRE_LIB['bootstrap5'])) {
-		$table_config['div_classes'] = array('card', 'mb-3');
-		$table_config['table_classes'] = array('table', 'uoj-table', 'mb-0');
-	}
+    if (isset($REQUIRE_LIB['bootstrap5'])) {
+    	$table_config['div_classes'] = array('card', 'mb-3');
+    	$table_config['table_classes'] = array('table', 'uoj-table', 'mb-0');
+    }
 
     echoLongTable(
     	array('a.id as group_id', 'a.title as title', 'a.is_hidden as is_hidden', 'count(b.username) as user_count'),
     	$from, $cond, 'group by a.id order by a.id asc',
     	$header,
     	'echoGroup',
-		$table_config
+    	$table_config
     );
     ?>