@media (min-width: 600px) and (max-width: 767px) {
  .spanfirst {
    margin-left: 0 !important;
    clear: left;
  }
}
.row .span50,
.row-fluid .span50 {
  width: 50%;
  float: left;
}
.row .span33,
.row-fluid .span33 {
  width: 33.3333%;
  float: left;
}
.row .span25,
.row-fluid .span25 {
  width: 25%;
  float: left;
}
.row .span20,
.row-fluid .span20 {
  width: 20%;
  float: left;
}
.row .span16,
.row-fluid .span16 {
  width: 16.6666%;
  float: left;
}