diff --git a/inc/helpers/aksrt-header-userbox.php b/inc/helpers/aksrt-header-userbox.php
index dad71990..0a4aa9c3 100644
--- a/inc/helpers/aksrt-header-userbox.php
+++ b/inc/helpers/aksrt-header-userbox.php
@@ -13,7 +13,9 @@ if (!function_exists('aksrt_header_user_checkin_btn')) :
 	 *
 	 * @param int         $user_id Current user ID.
 	 * @param bool        $compact Render a short card-friendly label.
-	 * @param string|null $class   Override the button classes (keeps data-signin behavior).
+	 * @param string|null $class   Override the classes and render the reference-parity
+	 *                             <a> badge (user-card 签到书签); null keeps the header
+	 *                             dropdown <button> runtime.
 	 */
 	function aksrt_header_user_checkin_btn(int $user_id = 0, bool $compact = false, ?string $class = null): string {
 		$user_id = $user_id > 0 ? $user_id : get_current_user_id();
@@ -30,6 +32,19 @@ if (!function_exists('aksrt_header_user_checkin_btn')) :
 		$signed = \AKSRT\Credits\Signin::get_instance()->is_signed_today($user_id);
 
 		$classes = $class ?? ('but block c-yellow aksrt-header-checkin' . ($compact ? ' aksrt-header-checkin--compact' : ''));
+
+		// Card badge variant (explicit $class, e.g. the user-card 签到 badge):
+		// reference parity renders an <a> so the badge inherits the card font
+		// instead of the UA button stylesheet (font/UI 1:1 with the reference).
+		if ($class !== null) {
+			return '<a class="' . esc_attr($classes . ($signed ? ' is-done' : '')) . '" href="javascript:;" data-signin-btn'
+				. ' data-signin-idle-label="' . esc_attr__('签到', 'aksrt') . '"'
+				. ' data-signin-done-label="' . esc_attr__('已签到', 'aksrt') . '">'
+				. '<i class="fa fas fa-calendar-check ml3 mr6" aria-hidden="true"></i>'
+				. '<span data-signin-label>' . esc_html($signed ? __('已签到', 'aksrt') : __('签到', 'aksrt')) . '</span>'
+				. '</a>';
+		}
+
 		if ($signed) {
 			return '<button type="button" class="' . esc_attr($classes . ' is-done') . '" data-signin-btn data-signin-idle-label="' . esc_attr__('签到', 'aksrt') . '" data-signin-done-label="' . esc_attr__('已签到', 'aksrt') . '" disabled>'
 				. '<i class="fa fas fa-calendar-check" aria-hidden="true"></i>'