筛选位置 Bug 修复

@@ -44,7 +44,6 @@
     <div class="sale-nav-wrap">
         {{> common/filter-nav}}
     </div>
-
     {{> product/sale/common}}
 
 </div>

@@ -35,6 +35,7 @@ $(function() {
     var $vipFloor = $('.vip-floor');
     var $saleNavWrap = $('.sale-nav-wrap');
     var $listNav = $saleNavWrap.find('#list-nav');
+    var $filterMask = $('.filter-mask');
 
     $('.sale-nav').on('click', function() {
         $saleNavSelect.toggleClass('show');
@@ -61,11 +62,18 @@ $(function() {
     $saleNavWrap.css({
         height: $saleNavWrap.height()
     });
+
     $(window).on('scroll', function() {
+        if (!$filterMask.length) {
+            $filterMask = $('.filter-mask');
+        }
+
         if ($body.scrollTop() > $saleNavWrap.offset().top) {
             $listNav.addClass('fixed');
+            $filterMask.addClass('fixed');
         } else {
             $listNav.removeClass('fixed');
+            $filterMask.removeClass('fixed');
         }
     }).trigger('scroll');
 });

@@ -110,6 +110,11 @@
             left: 0;
         }
     }
+
+    .filter-mask.fixed {
+        position: fixed;
+        top: 70px;
+    }
 }
 
 .sale-vip-page {