fix: avatar page

pages/avatar/index.vue

@@ -2,7 +2,7 @@
   <view class="avatar-page" :style="{ paddingTop: getBavBarHeight() + 'px' }">
     <view class="nav-bar">
       <view class="back" @tap="goBack">‹</view>
-      <text class="nav-title-left">新春头像挂饰</text>
+      <text class="nav-title">新春头像挂饰</text>
     </view>
     <view class="preview-card">
       <view class="preview-square">
@@ -725,12 +725,21 @@ const loadImage = (url) => {
   padding: 16rpx 24rpx;
 }
 .back {
-  font-size: 40rpx;
-  margin-right: 12rpx;
+  font-size: 50rpx;
+  margin-right: 24rpx;
+  line-height: 1;
+  color: #333;
+  /* 增大点击区域 */
+  padding: 20rpx;
+  margin-left: -20rpx;
 }
-.nav-title-left {
-  font-size: 32rpx;
-  font-weight: 600;
+.nav-title {
+  font-size: 34rpx;
+  font-weight: bold;
+  color: #333;
+  flex: 1;
+  text-align: center;
+  margin-right: 50rpx; /* Balance back button */
 }
 .preview-card {
   margin: 20rpx 24rpx;