.sub-menu {
  position: absolute;
  left: 0;
  top: 66px;
  z-index: 1;
  width: 100%;
  min-width: 1200px;
  height: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.sub-menu-item {
  position: relative;
  display: inline-block;
  height: 40px;
  line-height: 40px;
  opacity: .5;
  transition: all .2s;
}

.sub-menu-title {
  display: block;
  margin: 0 25px;
  font-size: 12px;
  color: #fff;
}

.sub-menu-item.active {
  opacity: 1;
}

.sub-menu-item:hover {
  opacity: 1;
}

.sub-menu-item.active:after {
  content: '';
  width: 16px;
  height: 3px;
  background: #07AAFF;
  border-radius: 2px;
  position: absolute;
  bottom: 0;
  left: 50%;
  margin-left: -8px;
}

.sub-menu-item.active .sub-menu-title {
  opacity: 1;
  font-weight: bold;
  color:#07AAFF;
}