.nav>li>a{
  display:inline-block;
  text-decoration:none;
}
/* 將子選單加入+號 */
.dropdown-menu{
  font-family: "微軟正黑體";
  background-color: #000;
  color: #fff;
}
li.dropdown-submenu>a:after{
  text-decoration:none;
  display:block;
  content:"+";
  float:right;
  font-size: 15px;
  margin-top:-1px;
  margin-left:5px;
  border: solid 1px #ccc;
  padding:0 4px;
  border-radius: 3px;   
}
/* 選單開啟時變- */
li.dropdown-submenu.open>a:after{
  content:"-";
}
li.open ul.dropdown-menu>li.open>ul.dropdown-menu{
  position: relative;
  border: 1 solid #fff;
  border-radius: 3px;
  box-shadow: none;
  background-color: #222;
  color: #fff;
}
li.open ul.dropdown-menu>li.open>ul.dropdown-menu>li{
  padding-left: 15px; 
}

/* 滑入選單時變換底色 */
.dropdown-menu>li>a{
  background: rgba(0,0,0) !important;
  color: #fff;
  text-decoration:none;
}
.dropdown-menu>li>a:focus,
.dropdown-menu>li>a:hover {
  background: rgb(0,102,153) !important;
  color: rgb(102,255,102);
  font-weight:bold;
}