.menu ul{
  margin:0;
  padding:0;

}
.menu ul li {
  list-style: none;
  margin:0;
  padding:0;
  font-size:12px;
  float: light;
  position: relative;
  width: 160px;
  height: 30px;
  line-height: 30px;
  background:#FF7F00;
  color: #000000;
  text-align:left;
  font-weight:bold;
}
.menu ul li a {
  color: #000000;
  display: block;
  text-decoration: none;
}
.menu ul li:hover, .menu ul li a:hover {
  background:#FFFFFF;
  color:#FF7F00;
}
.menu ul li ul {
  position: absolute;
  top: 30px;
  width: 160px;
  z-index: 100;
}
.menu ul li ul li {
  visibility: hidden;
  overflow: hidden;
  width: 160px;
  height: 0;
  background:#FFFFFF;
}
.menu ul li ul li:hover, .menu ul li ul li a:hover {
  background:#FFFFFF;
}
.menu ul li:hover ul li, .menu ul li a:hover ul li{
  visibility: visible;
  overflow: visible;
  height:30px;
  z-index: 10;
}
.menu * {
  -webkit-transition: 0.5s;
  -moz-transition: 0.5s;
  -ms-transition: 0.5s;
  -o-transition: 0.5s;
  transition: 0.5s;
}