設定產品／專案通用的元件，依照不同的需求去撰寫。

// -------------------------------------//   clearfix// ------------------------------------- .group:before, .group:after {  content: "";  display: table;}.group:after {  clear: both;}.group {  zoom: 1; // IE6&7} // -------------------------------------//   position// ------------------------------------- .set-l {  float: left;}.set-r {  float: right;} // -------------------------------------//   position// ------------------------------------- .is-hide {  display: none;}.is-show {  display: block;}