修正固定条fixed-top时出现的抖动

@@ -61,30 +61,31 @@ exports.init = function() {
         $(document).scroll(function() {
             var sTop = $(this).scrollTop();
 
+            //Tip: removeClass只用移除相邻状态即可
             if (sTop <= containerTop - wH + tContainerH) {
                 thumbContainer
                     .addClass('fixed-bottom')
-                    .removeClass('static fixed-top absolute');
+                    .removeClass('static');
             } else if (sTop <= containerTop) {
                 thumbContainer
                     .addClass('static')
-                    .removeClass('fixed-bottom fixed-top absolute');
+                    .removeClass('fixed-bottom fixed-top');
             } else if (sTop <= containerTop + containerH - tContainerH) {
                 thumbContainer
                     .addClass('fixed-top')
-                    .removeClass('static absolute fixed-bottom')
+                    .removeClass('static absolute')
                     .removeAttr('style');
             } else if (sTop < containerTop + containerH) {
                 thumbContainer
                     .addClass('absolute')
-                    .removeClass('static fixed-top fixed-bottom')
+                    .removeClass('static fixed-top')
                     .css({
                         top: containerTop + containerH - tContainerH
                     });
             } else if (sTop > containerTop + containerH) {
                 thumbContainer
                     .addClass('static')
-                    .removeClass('absolute fixed-top fixed-bottom')
+                    .removeClass('absolute')
                     .removeAttr('style');
             }
         });

@@ -7,13 +7,13 @@ $pxConvertRem : 40;
 
     /*container脱离文本流时占位用，指定高度为内部所有内容高度*/
     .container-fixed-pos {
-        height: 186rem / $pxConvertRem;
+        height: 175rem / $pxConvertRem;
         margin-left: -15rem / $pxConvertRem;
     }
 
     .thumb-container {
         font-size: 0;
-        padding: 20rem / $pxConvertRem 0 0 20rem / $pxConvertRem;
+        padding: 20rem / $pxConvertRem 0 0 20rem / $pxConvertRem; /*修改padding-bottom时请修正.container-fixed-pos高度*/
         background: #fff;
         z-index: 10;
         border-bottom: 1px solid #b0b0b0;
@@ -48,7 +48,7 @@ $pxConvertRem : 40;
             display: inline-block;
             position: relative;
             margin-right: 22rem / $pxConvertRem;
-            padding-bottom: 20rem / $pxConvertRem;
+            padding-bottom: 20rem / $pxConvertRem;  /*修改padding-bottom时请修正.container-fixed-pos高度*/
 
             &:last-child {
                 margin-right: 0;
@@ -74,7 +74,7 @@ $pxConvertRem : 40;
             }
 
             .thumb-img {
-                height: 134rem / $pxConvertRem;
+                height: 134rem / $pxConvertRem;  /*修改height时请修正.container-fixed-pos高度*/
                 width: 96rem / $pxConvertRem;
                 border: 1px solid transparent;
             }