diff --git a/inc/class-scripts.php b/inc/class-scripts.php
index 4936a6a77..8f3943bc9 100644
--- a/inc/class-scripts.php
+++ b/inc/class-scripts.php
@@ -33,9 +33,9 @@ public function init(): void {
 
 		add_action('init', [$this, 'register_default_styles']);
 
-		add_action('admin_init', [$this, 'enqueue_default_admin_styles']);
+		add_action('admin_enqueue_scripts', [$this, 'enqueue_default_admin_styles']);
 
-		add_action('admin_init', [$this, 'enqueue_default_admin_scripts']);
+		add_action('admin_enqueue_scripts', [$this, 'enqueue_default_admin_scripts']);
 
 		add_action('wp_ajax_wu_toggle_container', [$this, 'update_use_container']);
 
@@ -427,10 +427,19 @@ public function register_default_styles(): void {
 	/**
 	 * Loads the default admin styles.
 	 *
+	 * Only enqueued on WP Ultimo admin pages to avoid loading 150KB+ of CSS
+	 * on unrelated admin pages (e.g., Posts, Plugins, Settings).
+	 *
 	 * @since 2.0.0
+	 *
+	 * @param string $hook_suffix The current admin page hook suffix.
 	 * @return void
 	 */
-	public function enqueue_default_admin_styles(): void {
+	public function enqueue_default_admin_styles(string $hook_suffix): void {
+
+		if ( ! wu_is_wu_page($hook_suffix)) {
+			return;
+		}
 
 		wp_enqueue_style('wu-admin');
 
@@ -441,10 +450,19 @@ public function enqueue_default_admin_styles(): void {
 	/**
 	 * Loads the default admin scripts.
 	 *
+	 * Only enqueued on WP Ultimo admin pages to avoid loading scripts
+	 * on unrelated admin pages (e.g., Posts, Plugins, Settings).
+	 *
 	 * @since 2.0.0
+	 *
+	 * @param string $hook_suffix The current admin page hook suffix.
 	 * @return void
 	 */
-	public function enqueue_default_admin_scripts(): void {
+	public function enqueue_default_admin_scripts(string $hook_suffix): void {
+
+		if ( ! wu_is_wu_page($hook_suffix)) {
+			return;
+		}
 
 		wp_enqueue_script('wu-admin');
 
diff --git a/inc/functions/assets.php b/inc/functions/assets.php
index d2c115194..4723302d2 100644
--- a/inc/functions/assets.php
+++ b/inc/functions/assets.php
@@ -27,3 +27,30 @@ function wu_get_asset($asset, $assets_dir = 'img', $base_dir = 'assets') {
 
 	return wu_url("$base_dir/$assets_dir/$asset");
 }
+
+/**
+ * Checks if the current admin page belongs to WP Ultimo.
+ *
+ * Used to guard asset enqueues so that WP Ultimo scripts and styles are only
+ * loaded on WP Ultimo admin pages, not on every page in the network admin.
+ *
+ * Detection relies on the hook suffix passed to `admin_enqueue_scripts`. All
+ * WP Ultimo admin pages register with an ID prefixed by `wp-ultimo`, which
+ * WordPress uses when generating the page hook (e.g., `toplevel_page_wp-ultimo`,
+ * `wp-ultimo_page_wp-ultimo-settings`). The hook suffix always contains the
+ * page slug, so checking for `wp-ultimo` is reliable.
+ *
+ * @since 2.4.2
+ *
+ * @param string $hook_suffix The hook suffix passed to `admin_enqueue_scripts`.
+ * @return bool True if the current page is a WP Ultimo admin page.
+ */
+function wu_is_wu_page(string $hook_suffix = ''): bool {
+
+	if ('' === $hook_suffix) {
+		$screen      = get_current_screen();
+		$hook_suffix = $screen ? (string) $screen->id : '';
+	}
+
+	return str_contains($hook_suffix, 'wp-ultimo');
+}