fix(frontend): align top navigation with reference theme

inc/helpers/header/aksrt-header-menu-search.php

@@ -104,7 +104,7 @@ if (!function_exists('aksrt_footer_navbar_search')) :
 		echo '<div mini-touch="nav_search" touch-direction="top" class="main-search fixed-body main-bg box-body navbar-search nopw-sm">';
 		echo '<div class="container">';
 		echo $remote; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
-		echo '<div class="search-close-box"><button type="button" class="but cir" data-toggle-class data-target=".navbar-search" aria-label="'
+		echo '<div class="mb20 search-close-box"><button type="button" class="but cir" data-toggle-class data-target=".navbar-search" aria-label="'
 			. esc_attr__('关闭搜索', 'aksrt') . '"><svg class="ic-close" aria-hidden="true"><use xlink:href="#icon-close"></use></svg></button></div>';
 		echo '</div></div>';
 	}