diff --git a/inc/helpers/aksrt-single-aside.php b/inc/helpers/aksrt-single-aside.php
index 1fc4379b..551bb03a 100644
--- a/inc/helpers/aksrt-single-aside.php
+++ b/inc/helpers/aksrt-single-aside.php
@@ -16,13 +16,10 @@ if (!function_exists('aksrt_single_render_aside')) :
 	function aksrt_single_render_aside(array $ctx): void {
 		$post_id = (int) ($ctx['post_id'] ?? get_the_ID());
 
-		if (get_post_type($post_id) !== 'post') {
+		if (get_post_type($post_id) !== 'post' || empty($ctx['show_aside'])) {
 			return;
 		}
 
-		// The body site-layout-* class owns visibility. Always render the post
-		// sidebar so User-Agent or request-specific context cannot remove widgets
-		// from an otherwise two-column article page.
 		?>
 		<div class="sidebar aksrt-article-sidebar" role="complementary" aria-label="<?php esc_attr_e('侧栏', 'aksrt'); ?>">
 			<?php
diff --git a/inc/helpers/aksrt-single.php b/inc/helpers/aksrt-single.php
index 2f8ae331..9d697691 100644
--- a/inc/helpers/aksrt-single.php
+++ b/inc/helpers/aksrt-single.php
@@ -107,7 +107,7 @@ if (!function_exists('aksrt_single_build_context')) :
 		// browsers). The responsive stylesheet owns narrow-screen hiding.
 		$show_aside = get_post_type($post_id) === 'post'
 			&& $layout !== 'no_sidebar'
-			&& (!function_exists('aksrt_is_show_sidebar') || aksrt_is_show_sidebar());
+			&& aksrt_is_show_sidebar();
 
 		return [
 			'post_id'           => $post_id,
diff --git a/inc/helpers/template-tags/site-layout.php b/inc/helpers/template-tags/site-layout.php
index 65f61298..4014321f 100644
--- a/inc/helpers/template-tags/site-layout.php
+++ b/inc/helpers/template-tags/site-layout.php
@@ -61,9 +61,7 @@ if (!function_exists('aksrt_has_current_sidebar_widgets')):
  * sidebar, so any of these zones makes the column meaningful.
  */
 function aksrt_has_current_sidebar_widgets(): bool {
-    $sidebar_id = function_exists('aksrt_resolve_sidebar_id')
-        ? aksrt_resolve_sidebar_id()
-        : 'home_sidebar';
+    $sidebar_id = aksrt_resolve_sidebar_id();
     $sidebar_ids = array_unique(['all_sidebar_top', $sidebar_id, 'all_sidebar_bottom']);
 
     foreach ($sidebar_ids as $sidebar_id) {
@@ -122,7 +120,7 @@ endif;
 
 if (!function_exists('aksrt_is_show_sidebar')):
 /**
- * legacy-strict sidebar visibility (settings + post meta, not widget presence).
+ * Sidebar visibility from settings, post meta, and available article widgets.
  *
  * Filter: aksrt_is_show_sidebar
  *
@@ -148,6 +146,10 @@ function aksrt_is_show_sidebar_filter(): bool {
         return false;
     }
 
+    if (is_single() && !aksrt_has_current_sidebar_widgets()) {
+        return false;
+    }
+
     // Single / page: post meta can force show/hide (legacy show_layout).
     if (is_singular()) {
         $layout = aksrt_get_post_show_layout(get_queried_object_id());
@@ -189,8 +191,7 @@ function aksrt_is_show_sidebar_filter(): bool {
         }
     }
 
-    // Scene switches above already gated; when enabled, show the column
-    // (widgets may be empty — matches legacy empty sidebar column policy).
+    // Scene switches above already gated; when enabled, show the column.
     if (is_home() || is_front_page()) {
         return !empty($cfg['home']);
     }
diff --git a/tests/widget-system/post-visual-contract.test.cjs b/tests/widget-system/post-visual-contract.test.cjs
index 9d56bd0f..cf8f3fdc 100644
--- a/tests/widget-system/post-visual-contract.test.cjs
+++ b/tests/widget-system/post-visual-contract.test.cjs
@@ -271,6 +271,16 @@ test('the pinned visual baseline records all source checksums', () => {
   }
 });
 
+test('single posts reserve a sidebar column only when its widget stack has content', () => {
+  const layout = read('inc/helpers/template-tags/site-layout.php');
+  const single = read('inc/helpers/aksrt-single.php');
+  const aside = read('inc/helpers/aksrt-single-aside.php');
+
+  assert.match(layout, /if \(is_single\(\) && !aksrt_has_current_sidebar_widgets\(\)\) \{\s*return false;/);
+  assert.match(single, /\$show_aside = get_post_type\(\$post_id\) === 'post'[\s\S]*?&& aksrt_is_show_sidebar\(\);/);
+  assert.match(aside, /get_post_type\(\$post_id\) !== 'post' \|\| empty\(\$ctx\['show_aside'\]\)/);
+});
+
 test('article visual matrix pins every breakpoint, state and strict threshold', () => {
   const matrix = JSON.parse(read('tests/visual/article-visual-matrix-v1.json'));
   assert.deepEqual(matrix.viewports.map((item) => item.width), [1440, 1024, 768, 767, 641, 640, 390]);