/* 导航 */
.nav_items {
  width: 100%;
  height: 12vw;
  list-style: none;
  display: flex;
  justify-content: space-around;
  align-items: center;
  box-sizing: border-box;
  color: #000;
  margin-top: 50vw;
  background-color: #fff;
}
.nav_item {
  position: relative;
  box-sizing: border-box;
  font-size: 3.5vw;
  font-weight: 400;
  cursor: pointer;
}
.nav_item:after {
  content: "";
  width: 0;
  height: 2px;
  background: #0A74F1;
  position: absolute;
  top: 130%;
  left: 50%;
  transition: all 0.5s;
}
.nav_item:hover::after {
  left: 0;
  width: 100%;
}
.nav_item:hover {
  font-weight: 550;
}
.nav_item_white {
  position: relative;
  box-sizing: border-box;
  font-size: 2.4vw;
  font-weight: 400;
  cursor: pointer;
}
.nav_item_white:after {
  content: "";
  width: 0;
  height: 2px;
  background: #fff;
  position: absolute;
  top: 130%;
  left: 50%;
  transition: all 0.5s;
}
.nav_item_white:hover::after {
  left: 0;
  width: 100%;
}
.nav_item_white:hover {
  font-weight: 550;
}
.nav_item_active {
  position: relative;
  box-sizing: border-box;
  font-size: 3.5vw;
  font-weight: 550;
  cursor: pointer;
}
.nav_item_active:after {
  content: "";
  width: 60%;
  height: 2px;
  background: #0A74F1;
  position: absolute;
  top: 130%;
  left: 20%;
}
.nav_item_active_white {
  position: relative;
  box-sizing: border-box;
  font-size: 2.4vw;
  font-weight: 550;
  cursor: pointer;
}
.nav_item_active_white:after {
  content: "";
  width: 100%;
  height: 2px;
  background: #fff;
  position: absolute;
  top: 130%;
  left: 0%;
}
/* 导航 end */