diff --git a/archive.php b/archive.php
index 1792a1b5..f976fcff 100644
--- a/archive.php
+++ b/archive.php
@@ -53,11 +53,12 @@ if (function_exists('aksrt_archive_open_shell')) {
 						aksrt_render_admin_quick_link('post-list/list', __('列表样式设置', 'aksrt'));
 					}
 					$admin_link = trim((string) ob_get_clean());
-					set_query_var('aksrt_ph_eyebrow', __('内容归档', 'aksrt'));
-					set_query_var('aksrt_ph_title', get_the_archive_title());
-					set_query_var('aksrt_ph_desc', $archive_summary);
-					set_query_var('aksrt_ph_extra', $admin_link);
-					get_template_part('templates/parts/page-header');
+					get_template_part('templates/parts/page-header', null, [
+						'eyebrow' => __('内容归档', 'aksrt'),
+						'title'   => get_the_archive_title(),
+						'desc'    => $archive_summary,
+						'extra'   => $admin_link,
+					]);
 					?>
 
 					<?php
diff --git a/page.php b/page.php
index 5f83d70e..b013a675 100644
--- a/page.php
+++ b/page.php
@@ -22,7 +22,7 @@ $show_sidebar = function_exists('aksrt_is_show_sidebar') ? aksrt_is_show_sidebar
 	<div id="reading-progress-global" class="reading-progress-bar" role="progressbar" aria-label="<?php esc_attr_e('阅读进度', 'aksrt'); ?>" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"></div>
 <?php endif; ?>
 
-<main id="main-content" class="container page-content-<?php echo esc_attr($page_content_style); ?> page-id-<?php echo esc_attr((string) $page_id); ?>" tabindex="-1">
+<main id="main-content" class="site-main container content-shell content-shell--page page-content-<?php echo esc_attr($page_content_style); ?> page-id-<?php echo esc_attr((string) $page_id); ?>" tabindex="-1">
 
 	<?php if (is_active_sidebar('page_top_fluid_' . $page_id)) : ?>
 	<div class="fluid-widget-wrap">
@@ -31,52 +31,54 @@ $show_sidebar = function_exists('aksrt_is_show_sidebar') ? aksrt_is_show_sidebar
 	<?php endif; ?>
 
 	<div class="content-wrap">
-		<div class="content-layout<?php echo $show_sidebar ? "" : " no-sidebar"; ?>">
+		<div class="content-layout<?php echo $show_sidebar ? '' : ' content-layout--no-sidebar'; ?>">
 			<div class="content-layout__primary">
 				<?php if (is_active_sidebar('page_top_content_' . $page_id)) : ?>
 					<?php dynamic_sidebar('page_top_content_' . $page_id); ?>
 				<?php endif; ?>
 
 				<?php
-				while ( have_posts() ) :
+				while (have_posts()) :
 					the_post();
+
+					$page_meta_header_style = get_post_meta(get_the_ID(), 'page_header_style', true);
+					$ph_style_override = null;
+					if ($page_meta_header_style !== '' && in_array($page_meta_header_style, ['', '1', '2', '3', 'not'], true)) {
+						$ph_style_override = ($page_meta_header_style === 'not') ? '' : $page_meta_header_style;
+					}
+					$page_cover = (string) get_post_meta(get_the_ID(), 'page_header_cover_img', true);
+					$header_args = [
+						'title' => get_the_title(),
+					];
+					if ($ph_style_override !== null) {
+						$header_args['style'] = $ph_style_override;
+					}
+					if ($page_cover !== '') {
+						$header_args['cover'] = esc_url($page_cover);
+					}
 					?>
 					<article <?php post_class('entry-page'); ?>>
-						<?php
-						$page_meta_header_style = get_post_meta(get_the_ID(), 'page_header_style', true);
-						if ($page_meta_header_style !== '' && in_array($page_meta_header_style, ['', '1', '2', '3', 'not'], true)) {
-							$ph_style_override = ($page_meta_header_style === 'not') ? '' : $page_meta_header_style;
-							set_query_var('aksrt_ph_style', $ph_style_override);
-						}
-						$page_cover = get_post_meta(get_the_ID(), 'page_header_cover_img', true);
-						if (!empty($page_cover)) {
-							set_query_var('aksrt_ph_cover', esc_url($page_cover));
-						}
-						set_query_var('aksrt_ph_title', get_the_title());
-						get_template_part('templates/parts/page-header');
-						?>
+						<?php get_template_part('templates/parts/page-header', null, $header_args); ?>
 
-						<?php if ( has_post_thumbnail() ) : ?>
+						<?php if (has_post_thumbnail()) : ?>
 							<figure class="entry-thumb">
-								<?php the_post_thumbnail( 'large' ); ?>
+								<?php the_post_thumbnail('large'); ?>
 							</figure>
 						<?php endif; ?>
 
 						<div class="entry-content" data-aksrt-lightbox="<?php echo !empty($page_settings['lightbox']) ? '1' : '0'; ?>">
 							<?php the_content(); ?>
 							<?php
-							wp_link_pages(
-								array(
-									'before' => '<nav class="page-links"><span class="page-links-title">' . esc_html__( '分页：', 'aksrt' ) . '</span>',
-									'after'  => '</nav>',
-								)
-							);
+							wp_link_pages([
+								'before' => '<nav class="page-links"><span class="page-links-title">' . esc_html__('分页：', 'aksrt') . '</span>',
+								'after'  => '</nav>',
+							]);
 							?>
 						</div>
 					</article>
 
 					<?php
-					if ( comments_open() || get_comments_number() ) {
+					if (comments_open() || get_comments_number()) {
 						echo '<div class="theme-box box-body radius8 main-shadow comments-card">';
 						comments_template();
 						echo '</div>';
@@ -92,7 +94,7 @@ $show_sidebar = function_exists('aksrt_is_show_sidebar') ? aksrt_is_show_sidebar
 
 			<?php if ($show_sidebar) : ?>
 				<?php get_sidebar(); ?>
-				<?php endif; ?>
+			<?php endif; ?>
 		</div>
 	</div>
 
diff --git a/search.php b/search.php
index 76e72525..55091dfa 100644
--- a/search.php
+++ b/search.php
@@ -145,11 +145,12 @@ if (function_exists('aksrt_archive_open_shell')) {
 							aksrt_render_admin_quick_link('page-display/other', __('搜索页设置', 'aksrt'));
 						}
 						$admin_link = trim((string) ob_get_clean());
-						set_query_var('aksrt_ph_eyebrow', __('站内搜索', 'aksrt'));
-						set_query_var('aksrt_ph_title', $search_title);
-						set_query_var('aksrt_ph_desc', $search_desc);
-						set_query_var('aksrt_ph_extra', $admin_link);
-						get_template_part('templates/parts/page-header');
+						get_template_part('templates/parts/page-header', null, [
+							'eyebrow' => __('站内搜索', 'aksrt'),
+							'title'   => $search_title,
+							'desc'    => $search_desc,
+							'extra'   => $admin_link,
+						]);
 						?>
 
 						<section class="content-stream content-stream--search content-stream--archive" data-page-kind="search" data-render-mode="<?php echo esc_attr((string) $render_config['mode']); ?>" data-card-style="<?php echo esc_attr((string) $render_config['card_style']); ?>">
diff --git a/templates/parts/page-header.php b/templates/parts/page-header.php
index 6867c1c5..6c51b542 100644
--- a/templates/parts/page-header.php
+++ b/templates/parts/page-header.php
@@ -2,49 +2,66 @@
 /**
  * Reusable Page Header Template Part.
  *
- * Renders a unified page header for archive / search / page templates.
- * Style is driven by the global setting `page_header_style` with optional
- * per-page post-meta override (`page_header_style`).
+ * Contract: get_template_part(..., null, $args)
+ * Prefer explicit $args over ambient query vars.
  *
- * Query vars consumed (set via set_query_var before calling get_template_part):
- *   aksrt_ph_style   – override style ('' | '1' | '2' | '3'), defaults to global setting
- *   aksrt_ph_eyebrow – eyebrow label text
- *   aksrt_ph_title   – title HTML (already escaped by caller)
- *   aksrt_ph_desc    – description text
- *   aksrt_ph_cover   – cover image URL override
- *   aksrt_ph_extra   – extra HTML appended inside the body area (e.g. admin quick-links)
+ * Args:
+ *   style   – '' | '1' | '2' | '3' | 'not'
+ *   eyebrow – eyebrow label text
+ *   title   – title HTML (caller escapes)
+ *   desc    – description text
+ *   cover   – cover image URL override
+ *   extra   – extra HTML (caller escapes)
  *
  * @package AKSRT
  */
 
 defined('ABSPATH') || exit;
 
-// Resolve style: explicit query var > global setting.
-$ph_style = get_query_var('aksrt_ph_style', null);
+$args = is_array($args ?? null) ? $args : [];
+
+// Resolve style: explicit args > residual query var > global setting.
+$ph_style = array_key_exists('style', $args) ? $args['style'] : null;
+if ($ph_style === null) {
+	$ph_style = get_query_var('aksrt_ph_style', null);
+}
 if ($ph_style === null) {
 	$ph_style = class_exists('AKSRT_Settings')
 		? (AKSRT_Settings::get_other_page_settings()['header_style'] ?? '1')
 		: '1';
 }
+if ($ph_style === 'not') {
+	$ph_style = '';
+}
 
 // '' means "don't show header"
 if ($ph_style === '') {
 	return;
 }
 
-$ph_eyebrow = get_query_var('aksrt_ph_eyebrow', '');
-$ph_title   = get_query_var('aksrt_ph_title', '');
-$ph_desc    = get_query_var('aksrt_ph_desc', '');
-$ph_extra   = get_query_var('aksrt_ph_extra', '');
+$ph_eyebrow = array_key_exists('eyebrow', $args)
+	? (string) $args['eyebrow']
+	: (string) get_query_var('aksrt_ph_eyebrow', '');
+$ph_title = array_key_exists('title', $args)
+	? (string) $args['title']
+	: (string) get_query_var('aksrt_ph_title', '');
+$ph_desc = array_key_exists('desc', $args)
+	? (string) $args['desc']
+	: (string) get_query_var('aksrt_ph_desc', '');
+$ph_extra = array_key_exists('extra', $args)
+	? (string) $args['extra']
+	: (string) get_query_var('aksrt_ph_extra', '');
 
-// Cover image: explicit > global setting > post thumbnail.
-$ph_cover = get_query_var('aksrt_ph_cover', '');
-if (empty($ph_cover) && class_exists('AKSRT_Settings')) {
+// Cover image: explicit args > residual query var > global setting > post thumbnail.
+$ph_cover = array_key_exists('cover', $args)
+	? (string) $args['cover']
+	: (string) get_query_var('aksrt_ph_cover', '');
+if ($ph_cover === '' && class_exists('AKSRT_Settings')) {
 	$other = AKSRT_Settings::get_other_page_settings();
-	$ph_cover = $other['header_cover_img'] ?? '';
+	$ph_cover = (string) ($other['header_cover_img'] ?? '');
 }
-if (empty($ph_cover) && has_post_thumbnail()) {
-	$ph_cover = get_the_post_thumbnail_url(get_the_ID(), 'full');
+if ($ph_cover === '' && has_post_thumbnail()) {
+	$ph_cover = (string) get_the_post_thumbnail_url(get_the_ID(), 'full');
 }
 
 // Map style value to CSS modifier class.
@@ -57,13 +74,13 @@ if ($ph_style === '2') {
 
 // Cover inline style (for cover style).
 $cover_style = '';
-if ($ph_style === '3' && !empty($ph_cover)) {
+if ($ph_style === '3' && $ph_cover !== '') {
 	$cover_style = ' style="background-image:url(\'' . esc_url($ph_cover) . '\')"';
 }
 ?>
 
 <header class="page-header term-page-header <?php echo esc_attr($style_class); ?>">
-	<?php if ($ph_style === '3' && !empty($ph_cover)) : ?>
+	<?php if ($ph_style === '3' && $ph_cover !== '') : ?>
 		<div class="term-page-header__cover-bg"<?php echo $cover_style; /* phpcs:ignore -- escaped above */ ?>>
 			<div class="term-page-header__cover-overlay"></div>
 		</div>
@@ -87,7 +104,7 @@ if ($ph_style === '3' && !empty($ph_cover)) {
 		<?php endif; ?>
 	</div>
 
-	<?php if ($ph_style === '2' && !empty($ph_cover)) : ?>
+	<?php if ($ph_style === '2' && $ph_cover !== '') : ?>
 		<div class="term-page-header__cover"<?php echo $cover_style; /* phpcs:ignore -- escaped above */ ?>></div>
 	<?php endif; ?>
 </header>