diff --git a/frontend/src/components/activity/Activity.module.less b/frontend/src/components/activity/activity.module.less
similarity index 100%
rename from frontend/src/components/activity/Activity.module.less
rename to frontend/src/components/activity/activity.module.less
diff --git a/frontend/src/pages/activity/Detail.jsx b/frontend/src/pages/activity/Detail.jsx
index 3c3a789..6fb3dfd 100644
--- a/frontend/src/pages/activity/Detail.jsx
+++ b/frontend/src/pages/activity/Detail.jsx
@@ -70,10 +70,14 @@ const ActivityDetail = () => {
     }
   };
 
+  const handleSignUp = () => {
+      signUpMutation.mutate();
+  };
+
   if (isLoading) {
     return (
       <div style={{ display: 'flex', justifyContent: 'center', alignItems: 'center', height: '100vh', background: '#1f1f1f' }}>
-        <Spin size="large" tip="加载活动详情..." />
+        <Spin size="large" />
       </div>
     );
   }
@@ -167,6 +171,10 @@ const ActivityDetail = () => {
                <CalendarOutlined />
                <span>{activity.start_time ? new Date(activity.start_time).toLocaleDateString() : 'TBD'}</span>
              </div>
+             <div style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
+               <ClockCircleOutlined />
+               <span>{activity.start_time ? new Date(activity.start_time).toLocaleTimeString() : 'TBD'}</span>
+             </div>
              <div style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
                <EnvironmentOutlined />
                <span>{activity.location || '线上活动'}</span>