diff --git a/inc/helpers/aksrt-header-userbox.php b/inc/helpers/aksrt-header-userbox.php
index bc9e52a4..9b1e1cbf 100644
--- a/inc/helpers/aksrt-header-userbox.php
+++ b/inc/helpers/aksrt-header-userbox.php
@@ -59,13 +59,13 @@ if (!function_exists('aksrt_header_user_checkin_btn')) :
 				// 用户卡片签到书签：保留书签类与 is-done 视觉，仅将行为切换为打开详情弹窗。
 				return aksrt_get_user_checkin_details_link(
 					$class . ' is-done',
-					'<i class="fa fas fa-calendar-check ml3 mr6" aria-hidden="true"></i>'
+					'<i class="fa far fa-calendar-check ml3 mr6" aria-hidden="true"></i>'
 					. '<span>' . esc_html__('已签到', 'aksrt') . '</span>'
 				);
 			}
 			return aksrt_get_user_checkin_details_link(
 				'but block c-yellow is-done',
-				'<i class="fa fas fa-calendar-check mr6" aria-hidden="true"></i>'
+				'<i class="fa far fa-calendar-check" aria-hidden="true"></i> '
 				. esc_html__('今日已签到', 'aksrt')
 			);
 		}
@@ -77,7 +77,7 @@ if (!function_exists('aksrt_header_user_checkin_btn')) :
 			return '<a class="' . esc_attr($class) . '" 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>'
+				. '<i class="fa far fa-calendar-check ml3 mr6" aria-hidden="true"></i>'
 				. '<span data-signin-label>' . esc_html__('签到', 'aksrt') . '</span>'
 				. '</a>';
 		}
@@ -85,7 +85,7 @@ if (!function_exists('aksrt_header_user_checkin_btn')) :
 		return '<a class="but block c-yellow" href="javascript:;" data-signin-btn'
 			. ' data-signin-idle-label="' . esc_attr__('签到', 'aksrt') . '"'
 			. ' data-signin-done-label="' . esc_attr__('今日已签到', 'aksrt') . '">'
-			. '<i class="fa fas fa-calendar-check mr6" aria-hidden="true"></i>'
+			. '<i class="fa far fa-calendar-check" aria-hidden="true"></i> '
 			. '<span data-signin-label>' . esc_html__('签到领取今日奖励', 'aksrt') . '</span>'
 			. '</a>';
 	}
diff --git a/tests/navigation/legacy-navigation-contract.test.cjs b/tests/navigation/legacy-navigation-contract.test.cjs
index 1f1fbece..7990fedd 100644
--- a/tests/navigation/legacy-navigation-contract.test.cjs
+++ b/tests/navigation/legacy-navigation-contract.test.cjs
@@ -217,6 +217,14 @@ test('the account popover rows match the reference user box structure', () => {
   // Check-in entry is an anchor with the reference button classes.
   assert.match(header, /but block c-yellow/);
   assert.match(header, /data-signin-done-label[\s\S]{0,120}?今日已签到/);
+  // The reference renders fa-calendar-check-o, an outline glyph; FA5 keeps that
+  // look through the regular weight rather than the solid one.
+  assert.match(header, /fa far fa-calendar-check/);
+  assert.doesNotMatch(header, /fas fa-calendar-check/);
+  // .but already gives its icon a 0.25em margin, so the popover entry carries no
+  // margin class; the user-card badge keeps its own because it is not a .but.
+  assert.match(header, /<i class="fa far fa-calendar-check" aria-hidden="true"><\/i> '/);
+  assert.match(header, /fa far fa-calendar-check ml3 mr6/);
 
   // Card geometry falls back to the reference .sub-user-box width.
   assert.match(legacyMainCss, /\.sub-user-box\s*\{\s*width:\s*242px;/s);