mav > ul {
  font-size: 16px;
  font-family:Arial, Helvetica, sans-serif;
  list-style: none;
  margin: 0;
  padding: 0;
 
}

mav {
  width: 203px;
  margin: 0px auto 0px;
  font-size: 16px;

}

mav > ul > li {
  width: 203px;
  float: none;
  position: relative;
  z-index:1;
}

mav > ul > li a {
  display: block;
  background: #5C768D;
  color: #fff;
  margin: 0px 0px 1px 0px;
  padding: 11px 0px;
  text-align: center;
  text-decoration: none;
}

mav > ul > li a:hover { background: #000000;  color: #fff;}

mav > ul > li:hover a + ul { /*    display: block;*/
}

mav > ul > li > ul {
  position: absolute;
  width: 100%;
  left: 0px;
  top: 100%;
  display: none;
}