.row {
  zoom: 1;
  margin-left: -20px;
}
.row:before, .row:after {
  display: table;
  content: "";
  zoom: 1;
}
.row:after {
  clear: both;
}
.row > [class*="span"] {
  display: inline;
  float: left;
  margin-left: 20px;
  min-height: 1px;
}
.span1 {
  width: 40px;
}
.span2 {
  width: 100px;
}
.span3 {
  width: 160px;
}
.span4 {
  width: 220px;
}
.span5 {
  width: 280px;
}
.span6 {
  width: 340px;
}
.span7 {
  width: 400px;
}
.span8 {
  width: 460px;
}
.span9 {
  width: 520px;
}
.span10 {
  width: 580px;
}
.span11 {
  width: 640px;
}
.span12 {
  width: 700px;
}
.span13 {
  width: 760px;
}
.span14 {
  width: 820px;
}
.span15 {
  width: 880px;
}
.span16 {
  width: 940px;
}
.span17 {
  width: 1000px;
}
.span18 {
  width: 1060px;
}
.span19 {
  width: 1120px;
}
.span20 {
  width: 1180px;
}
.span21 {
  width: 1240px;
}
.span22 {
  width: 1300px;
}
.span23 {
  width: 1360px;
}
.span24 {
  width: 1420px;
}