锘/* Slide Down============================== */
.nav li ul {
    background: #273754;
	margin:44px 0 0 0;
}
.nav3 ul > li:hover ul li {
  height: 45px;
}
.nav3 li ul {
  position: absolute;
  left: 0;
  top: 36px;
  z-index: 9999;
}
.nav3 li ul li {
  overflow: hidden;
  height: 0;
  -webkit-transition: height 200ms ease-in;
  -moz-transition: height 200ms ease-in;
  -o-transition: height 200ms ease-in;
  transition: height 200ms ease-in;
}
.nav3 li ul li a{
	line-height: 45px;
}


.goTop{
    width: 50px;
    height: 50px;
    background-color: #0066BF;
    font-size: 20px;
    text-align: center;
    line-height: 25px;
    color: #ffffff;
    position: fixed;
    bottom: 50px;
    right: 50px;
    cursor:pointer;
    border:1px solid #ffffff;border-radius: 8px;
    display: none;
    z-index: 10;
}<!--0.00020694732666016-->