diff --git a/web/app/controllers/groups.php b/web/app/controllers/groups.php
index 41b1f23..2957079 100644
--- a/web/app/controllers/groups.php
+++ b/web/app/controllers/groups.php
@@ -125,7 +125,7 @@ EOD;
 <aside class="col mt-3 mt-md-0">
 <?php 
 	uojIncludeView('sidebar', array());
-?>
+	?>
 </aside>
 
 </div>
diff --git a/web/app/controllers/problem_lists.php b/web/app/controllers/problem_lists.php
index 5929ab7..28d63dc 100644
--- a/web/app/controllers/problem_lists.php
+++ b/web/app/controllers/problem_lists.php
@@ -154,7 +154,7 @@ EOD;
 <aside class="col mt-3 mt-md-0">
 <?php 
 	uojIncludeView('sidebar', array());
-?>
+	?>
 </aside>
 
 </div>
diff --git a/web/app/controllers/problem_set.php b/web/app/controllers/problem_set.php
index dc104fb..e2cc227 100644
--- a/web/app/controllers/problem_set.php
+++ b/web/app/controllers/problem_set.php
@@ -287,7 +287,7 @@ $('#input-show_submit_mode').click(function() {
 <aside class="col mt-3 mt-md-0">
 <?php 
 	uojIncludeView('sidebar', array());
-?>
+	?>
 </aside>
 
 </div>
diff --git a/web/app/views/sidebar.php b/web/app/views/sidebar.php
index 919f90d..e8e6af0 100644
--- a/web/app/views/sidebar.php
+++ b/web/app/views/sidebar.php
@@ -9,8 +9,8 @@
 		<?php foreach ($groups as $group): ?>
 			<?php
 				$group_detail = DB::selectFirst("select * from groups where id = {$group['id']}");
-				$group_announcement = $group_detail['announcement'];
-				?>
+			$group_announcement = $group_detail['announcement'];
+			?>
 			<li class="list-group-item">
 				<a class="fw-bold text-decoration-none" href="<?= HTML::url('/group/'.$group['id']) ?>">
 					<?= $group['title'] ?>
@@ -34,7 +34,7 @@
 <?php if (!isset($upcoming_contests_hidden)): ?>
 <?php
 	$upcoming_contests = DB::selectAll("SELECT * FROM contests WHERE status = 'unfinished' ORDER BY start_time ASC, id ASC LIMIT 7");
-?>
+	?>
 <div class="card card-default mb-2" id="group-user-announcements">
 	<div class="card-header fw-bold bg-transparent">
 		近期比赛
@@ -54,8 +54,8 @@
 				<?= UOJLocale::get('contests::in progress') ?>
 				<?php else: ?>
 				<?php
-					$rest_seconds = $contest['start_time']->getTimestamp() - UOJTime::$time_now->getTimestamp();
-				?>
+						$rest_seconds = $contest['start_time']->getTimestamp() - UOJTime::$time_now->getTimestamp();
+					?>
 				<?php if ($rest_seconds > 86400): ?>
 				<?= UOJLocale::get('contests::will start in x days', floor($rest_seconds / 86400)) ?>
 				<?php else: ?>