a.o_nas {
  display: block;
  background: url(/en/img/nas1.gif) no-repeat;
  margin: 88px 65px 20px 137px;
}
div.o_nas, a.o_nas:hover {margin: 88px 65px 20px 137px; background: url(/en/img/nas2.gif) no-repeat;}
a.work {
  display: block;
  background: url(/en/img/pracia1.gif) no-repeat;
  margin: 23px 95px 20px 80px;
}
div.work, a.work:hover {margin: 23px 95px 20px 80px; background: url(/en/img/pracia2.gif) no-repeat;}
a.projects {
  display: block;
  background: url(/en/img/proekt1.gif) no-repeat;
  margin: 23px 155px 25px 50px;
}
div.projects, a.projects:hover {margin: 23px 155px 25px 50px; background: url(/en/img/proekt2.gif) no-repeat;}

a.partners {
  display: block;
  background: url(/en/img/partn1.gif) no-repeat;
  margin: 23px 40px 0px 73px;
}
div.partners, a.partners:hover {margin: 23px 40px 0px 73px; background: url(/en/img/partn2.gif) no-repeat;}