fix(scenic-detail): swiper dots covered by info-card

Add position:relative + z-index:6 to hero-swiper so it sits above
the info-card (z-index:5) which overlaps the bottom 40rpx via
negative margin. Dots are now visible above the overlap zone.

Co-Authored-By: Claude <noreply@anthropic.com>

src/packages/content/pages/scenic-detail.vue

@@ -271,6 +271,8 @@ $icon-crown: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' w
 .hero-swiper {
   width: 100%;
   height: 480rpx;
+  position: relative;
+  z-index: 6;
 
   :deep(.uni-swiper-dots) {
     z-index: 10;

src/pages/index/index.vue

@@ -71,7 +71,7 @@
             <view class="promo-price-row">
               <view class="promo-price-block">
                 <text class="promo-currency">¥</text>
-                <text class="promo-price">98</text>
+                <text class="promo-price">198</text>
               </view>
               <view class="promo-value-block">
                 <text class="promo-value">¥3800+</text>