fix: avatar page

pages/mine/vip.vue

@@ -8,9 +8,7 @@
         paddingTop: statusBarHeight + 'px',
       }"
     >
-      <view class="nav-left" @click="goBack">
-        <uni-icons type="left" size="24" color="#000" />
-      </view>
+      <view class="back" @click="goBack">‹</view>
       <text class="nav-title">会员中心</text>
     </view>
 
@@ -238,23 +236,26 @@ const handlePurchase = async () => {
   background-color: #fff;
   display: flex;
   align-items: center;
-  justify-content: center;
+  padding: 0 24rpx;
   z-index: 100;
   box-shadow: 0 2rpx 10rpx rgba(0, 0, 0, 0.05);
 
-  .nav-left {
-    position: absolute;
-    left: 30rpx;
-    bottom: 0;
-    height: 44px; // Standard title bar height
-    display: flex;
-    align-items: center;
+  .back {
+    font-size: 50rpx;
+    margin-right: 24rpx;
+    line-height: 1;
+    color: #333;
+    padding: 20rpx;
+    margin-left: -20rpx;
   }
 
   .nav-title {
     font-size: 34rpx;
     font-weight: 600;
     color: #000;
+    flex: 1;
+    text-align: center;
+    margin-right: 50rpx;
   }
 }