.container_4{margin-left: auto;margin-right: auto;width: 880px;}.grid_1, .grid_2, .grid_3, .grid_4 {display: inline;float: left;position:relative;margin-left: 10px;margin-right: 10px;}.alpha {margin-left: 0;}.omega {margin-right: 0;}.container_4 .grid_1 {width: 200px;}.container_4 .grid_2 {width: 420px;}.container_4 .grid_3 {width: 640px;}.container_4 .grid_4 {width: 860px;}.container_4 .prefix_1 {padding-left: 220px;}.container_4 .prefix_2 {padding-left: 440px;}.container_4 .prefix_3 {padding-left: 660px;}.container_4 .suffix_1 {padding-right: 220px;}.container_4 .suffix_2 {padding-right: 440px;}.container_4 .suffix_3 {padding-right: 660px;}.container_4 .push_1 {left: 220px;}.container_4 .push_2 {left: 440px;}.container_4 .push_3 {left: 660px;}.container_4 .pull_1 {left: -220px;}.container_4 .pull_2 {left: -440px;}.container_4 .pull_3 {left: -660px;}.clear {clear: both;display: block;overflow: hidden;visibility: hidden;width: 0;height: 0;}.clearfix:after {clear: both;content:' ';display: block;font-size: 0;line-height: 0;visibility: hidden;width: 0;height: 0;}.clearfix {display: inline-block;}* html .clearfix {height: 1%;}.clearfix {display: block;}