fix(tabs): 修复 box-sizing 对主体区域中其他组件的样式影响 (#2622)

src/css/layui.css

@@ -1296,7 +1296,6 @@ body .layui-table-tips .layui-layer-content{background: none; padding: 0; box-sh
 
 /* Tabs 标签页 */
 .layui-tabs{position: relative;}
-.layui-tabs *{box-sizing: border-box;}
 .layui-tabs.layui-hide-v{overflow: hidden;}
 .layui-tabs-header{position: relative; left: 0; height: 40px; padding: 0 !important; white-space: nowrap; font-size: 0; transition: all .16s; -webkit-transition: all .16s;}
 .layui-tabs-header:after,

src/modules/tabs.js

@@ -563,7 +563,7 @@ layui.define('component', function(exports) {
 
     // 滚动结构
     var rollElem = {
-      elem: $('<div class="'+ CLASS_SCROLL +' layui-unselect"></div>'),
+      elem: $('<div class="'+ CLASS_SCROLL +' layui-border-box layui-unselect"></div>'),
       bar: $([
         '<div class="'+ CLASS_BAR +'">',
           '<i class="layui-icon '+ CLASS_BAR_ICON[0] +'" lay-mode="prev"></i>',