diff --git a/web/app/controllers/contest_inside.php b/web/app/controllers/contest_inside.php
index 9af328c..c4fa823 100644
--- a/web/app/controllers/contest_inside.php
+++ b/web/app/controllers/contest_inside.php
@@ -197,7 +197,7 @@ EOD;
 	} elseif ($cur_tab == 'backstage') {
 		if (isSuperUser(Auth::user())) {
 			$post_notice = new UOJForm('post_notice');
-			$post_notice->addInput('title', 'text', '标题', '',
+			$post_notice->addVInput('title', 'text', '标题', '',
 				function($title) {
 					if (!$title) {
 						return '标题不能为空';
@@ -206,7 +206,7 @@ EOD;
 				},
 				null
 			);
-			$post_notice->addTextArea('content', '正文', '', 
+			$post_notice->addVTextArea('content', '正文', '', 
 				function($content) {
 					if (!$content) {
 						return '公告不能为空';
diff --git a/web/app/views/contest-backstage.php b/web/app/views/contest-backstage.php
index 22dacb2..c6d788b 100644
--- a/web/app/views/contest-backstage.php
+++ b/web/app/views/contest-backstage.php
@@ -1,28 +1,29 @@
-
-<ul class="nav nav-pills float-right" role="tablist">
-	<li class="nav-item"><a class="nav-link active" href="#tab-question" role="tab" data-bs-toggle="tab" data-bs-target="#tab-question">提问</a></li>
-	<?php if ($post_notice): ?>
-		<li class="nav-item"><a class="nav-link" href="#tab-notice" role="tab" data-bs-toggle="tab" data-bs-target="#tab-notice">公告</a></li>
-	<?php endif ?>
-	<?php if ($standings_data): ?>
-		<li class="nav-item"><a class="nav-link" href="#tab-standings" role="tab" data-bs-toggle="tab" data-bs-target="#tab-standings">终榜</a></li>
-	<?php endif ?>
-</ul>
+<div class="card">
+<div class="card-header">
+	<ul class="nav nav-tabs card-header-tabs" role="tablist">
+		<li class="nav-item"><a class="nav-link active" href="#tab-question" role="tab" data-bs-toggle="tab" data-bs-target="#tab-question">提问</a></li>
+		<?php if ($post_notice): ?>
+			<li class="nav-item"><a class="nav-link" href="#tab-notice" role="tab" data-bs-toggle="tab" data-bs-target="#tab-notice">公告</a></li>
+		<?php endif ?>
+		<?php if ($standings_data): ?>
+			<li class="nav-item"><a class="nav-link" href="#tab-standings" role="tab" data-bs-toggle="tab" data-bs-target="#tab-standings">终榜</a></li>
+		<?php endif ?>
+	</ul>
+</div>
 <div class="tab-content">
-	<div class="tab-pane active" id="tab-question">
-		<h3>提问</h3>
-		<?php uojIncludeView('contest-question-table', ['pag' => $questions_pag, 'can_reply' => true, 'reply_question' => $reply_question]) ?>
+	<div class="tab-pane card-body active" id="tab-question">
+		<?php uojIncludeView('contest-question-table', ['pag' => $questions_pag, 'can_reply' => true, 'reply_question' => $reply_question, 'no_bs5_card' => '']) ?>
 	</div>
 	<?php if ($post_notice): ?>
-		<div class="tab-pane" id="tab-notice">
-			<h3>发布比赛公告</h3>
+		<div class="tab-pane card-body" id="tab-notice">
+			<h4>发布比赛公告</h4>
 			<?php $post_notice->printHTML() ?>
 		</div>
 	<?php endif ?>
 	<?php if ($standings_data): ?>
-		<div class="tab-pane" id="tab-standings">
-			<h3>终榜</h3>
-			<?php uojIncludeView('contest-standings', $standings_data) ?>
+		<div class="tab-pane card-body" id="tab-standings">
+			<?php uojIncludeView('contest-standings', array_merge($standings_data, ['no_bs5_card' => ''])) ?>
 		</div>
 	<?php endif ?>
 </div>
+</div>
diff --git a/web/app/views/contest-question-table.php b/web/app/views/contest-question-table.php
index 0ae9000..3fbcc14 100644
--- a/web/app/views/contest-question-table.php
+++ b/web/app/views/contest-question-table.php
@@ -7,8 +7,14 @@ if (!isset($can_reply)) {
 
 ?>
 <?php if (isset($REQUIRE_LIB['bootstrap5'])): ?>
-<div class="card card-default table-responsive mb-3">
-	<table class="table uoj-table text-center mb-0">
+<div class="table-responsive mb-3
+	<?php if (!isset($no_bs5_card)): ?>
+		card card-default
+	<?php endif ?>">
+	<table class="table text-center mb-0
+	<?php if (!isset($no_bs5_card)): ?>
+	uoj-table
+	<?php endif ?>">
 <?php else: ?>
 <div class="table-responsive">
 	<table class="table table-bordered table-hover table-vertical-middle table-text-center">
diff --git a/web/app/views/contest-standings.php b/web/app/views/contest-standings.php
index 57cb351..67a2d73 100644
--- a/web/app/views/contest-standings.php
+++ b/web/app/views/contest-standings.php
@@ -1,8 +1,7 @@
-<div class="card card-default" id="standings"></div>
-
-<div class="table-responsive">
-	<table id="standings-table" class="table table-bordered table-striped table-text-center table-vertical-middle"></table>
-</div>
+<div id="standings" class="
+<?php if (!isset($no_bs5_card)): ?>
+	card card-default
+<?php endif ?>"></div>
 
 <script type="text/javascript">
 standings_version=<?=$contest['extra_config']['standings_version']?>;