Merge branch 'feature/v4.8.87' of https://jygit.jydev.jianyu360.cn/qmx/jy into dev/v4.8.87_wmh

src/web/staticres/css/pc/index.css

@@ -1331,7 +1331,7 @@ cursor: pointer;
   display: flex;
   justify-content: center;
   width: 100%;
-  z-index: 999;
+  z-index: 998;
 }
 
 .pc-index-bottom>.bottom-member-ad {

src/web/templates/pc/template/index/index-bottom-float-ad.html

@@ -1,4 +1,4 @@
-<div class="pc-index-bottom">
+<div class="pc-index-bottom" style="display: none;">
   <img class="bottom-member-ad" adv_name="PC首页广告位-底部" src="" alt="底部广告位">
 </div>
 
@@ -44,6 +44,7 @@
         var top1 = 0;
         var top2 = 0;
         var timer = null; 
+        $('.pc-index-bottom').fadeIn()
         $(document).scroll(function(){
           clearTimeout(timer)
           timer = setTimeout(isScrollEnd, 1000);