fix: avatar page

pages/fortune/index.vue

@@ -2,7 +2,7 @@
   <view class="fortune-page" :style="{ paddingTop: getBavBarHeight() + 'px' }">
     <!-- 顶部导航 -->
     <view class="nav-bar">
-      <view class="back-btn" @tap="goBack">‹</view>
+      <view class="back" @tap="goBack">‹</view>
       <text class="nav-title">2026 新年运势</text>
     </view>
 
@@ -397,22 +397,27 @@ const saveCard = () => {
   height: 44px;
   display: flex;
   align-items: center;
-  padding: 0 16px;
+  padding: 0 24rpx;
   z-index: 100;
   position: relative;
 }
-.back-btn {
-  font-size: 28px;
+.back {
+  font-size: 50rpx;
   color: #ffd700;
-  margin-right: 12px;
+  margin-right: 24rpx;
   line-height: 1;
   text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
+  padding: 20rpx;
+  margin-left: -20rpx;
 }
 .nav-title {
-  font-size: 18px;
+  font-size: 34rpx;
   font-weight: 600;
   color: #ffd700;
   text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
+  flex: 1;
+  text-align: center;
+  margin-right: 50rpx;
 }
 
 /* 初始状态 */