diff --git a/src/views/Ai.vue b/src/views/Ai.vue
index d8580bd..0534b43 100644
--- a/src/views/Ai.vue
+++ b/src/views/Ai.vue
@@ -1223,7 +1223,7 @@ button:active {
 }
 
 .block_4 {
-  background-image: url('/images/ai/77.jpg');
+  background-image: url('/images/ai/77.png');
   width: 360px;
   height: 168px;
 }
@@ -1722,7 +1722,7 @@ button:active {
 }
 
 .box_11 {
-  background-image: url('/images/ai/77.jpg');
+  background-image: url('/images/ai/77.png');
   width: 360px;
   height: 168px;
 }
diff --git a/src/views/Home.vue b/src/views/Home.vue
index a3f9efa..6f9d9f4 100644
--- a/src/views/Home.vue
+++ b/src/views/Home.vue
@@ -724,8 +724,10 @@ const scrollToTop = () => {
 }
 
 const showIssueModal = () => {
-  // 跳转到帮助中心
-  router.push('/help-center')
+  // 跳转到帮助中心并刷新
+  router.push('/help-center').then(() => {
+    window.location.reload();
+  })
 }
 
 onMounted(async () => {
@@ -1352,15 +1354,15 @@ onMounted(async () => {
 
 .course-image {
   position: relative;
-  width: 334px;
-height: 209px;
+  width: 340px;
+  height: 209px;
   overflow: hidden;
   background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
   flex-shrink: 0;
 }
 
 .course-image img {
-  width: 334px;
+  width: 340px;
   height: 209px;
   object-fit: cover;
 }