.nossomenu > li > a {
  display: block;
  padding: 5px;
  background: #333;
  color: #fff;
  text-decoration: none;
}

.nossomenu > li > ul {
  background: #aaa;
}

.nossomenu > li > ul > li > a {
  color: #555;
  display: block;
  padding: 5px 20px;
}

.nossomenu > li > ul > li:hover > a {
  color: #aaa;
  text-decoration: none;
  background: #555;
}