.fl-page .fl-page-header .fl-page-nav ul.nav li a {
  display: inline-block;
  vertical-align: middle;
  transform: perspective(1px) translateZ(0);
  box-shadow: 0 0 1px rgba(0, 0, 0, 0);
  position: relative;
  overflow: hidden;
}
.fl-page .fl-page-header .fl-page-nav ul.nav li a:before {
  content: "";
  position: absolute;
  z-index: -1;
  left: 51%;
  right: 51%;
  top: 0;
  background: #f4a326;
  height: 4px;
  transition-property: left, right;
  transition-duration: 0.3s;
  transition-timing-function: ease-out;
}
.fl-page .fl-page-header .fl-page-nav ul.nav li a:hover:before,
.fl-page .fl-page-header .fl-page-nav ul.nav li a:focus:before,
.fl-page .fl-page-header .fl-page-nav ul.nav li a:active:before {
  left: 0;
  right: 0;
}