.car-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3.125vw;
  background: rgba(16, 16, 16, 0.9);
  backdrop-filter: blur(5.20833vw);
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  transition: transform 0.6s ease;
  transform: translateY(-100%);
  z-index: 8;
}
.car-nav.up {
  transform: translateY(-100%);
}
.car-nav.down {
  transform: translateY(0);
}
.car-nav .title {
  font-family: "BYDcv";
  font-weight: 400;
  font-size: 2.08333vw;
  line-height: 2.08333vw;
  color: #ffffff;
}
.car-nav .right-btn-menu {
  display: flex;
  align-items: center;
}
.car-nav .menu-list {
  display: flex;
  align-items: center;
  gap: 3.125vw;
}
.car-nav .menu-list a {
  font-size: 0.83333vw;
  color: #ffffff;
  line-height: 4.16667vw;
}
.car-nav .menu-list a.cur {
  position: relative;
}
.car-nav .menu-list a.cur::after {
  content: "";
  width: 100%;
  height: 0.15625vw;
  background: #da251c;
  position: absolute;
  bottom: 0px;
  left: 50%;
  transform: translate(-50%, 0);
}
.car-nav .menu-list a:hover {
  position: relative;
}
.car-nav .menu-list a:hover::after {
  content: "";
  width: 100%;
  height: 0.15625vw;
  background: #da251c;
  position: absolute;
  bottom: 0px;
  left: 50%;
  transform: translate(-50%, 0);
}
.car-nav .btn-list {
  display: flex;
  align-items: center;
  margin-left: 3.125vw;
  gap: 1.5625vw;
}
.car-nav .btn-list .btn {
  animation-duration: 0.6s;
  position: relative;
  overflow: hidden;
  width: 9.375vw;
  height: 2.5vw;
  border-radius: 9.375vw;
  font-size: 0.9375vw;
  color: #ffffff;
}
.car-nav .btn-list .btn a {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: calc(100% - 2PX);
  z-index: 2;
  display: block;
  border-radius: 4.16667vw;
  display: flex;
  align-items: center;
  justify-content: center;
}
.car-nav .btn-list .btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: calc(100% - 2PX);
  height: calc(100% - 2PX);
  border: 1PX solid #ffffff;
  border-radius: 9.375vw;
  z-index: 0;
  box-sizing: border-box;
}
.car-nav .btn-list .btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: #da251c;
  transition: width 0.3s;
  z-index: 1;
}
.car-nav .btn-list .btn:hover::before {
  width: 100%;
}
.car-nav .btn-list .btn:hover a {
  color: #ffffff;
}
.car-nav .btn-list .btn {
  height: 2.34375vw;
  width: 7.29167vw;
}
@media screen and (max-width: 768px) and (orientation: portrait) and (pointer: coarse) {
.mob--car-nav {
    padding: 1rem 1.66667rem;
    z-index: 9;
}
.mob--car-nav .title {
    font-family: "BYDcv";
    font-weight: 400;
    font-size: 1.66667rem;
    line-height: 1.66667rem;
    color: #ffffff;
}
.mob--car-nav .right-btn-menu {
    display: flex;
    align-items: center;
}
.mob--car-nav .menu-list {
    flex-direction: column;
    position: absolute;
    top: 3.66667rem;
    background: rgba(16, 16, 16, 0.9);
    backdrop-filter: blur(3.33333rem);
    left: 0;
    gap: 0;
    width: 100%;
    z-index: 6;
    height: calc(var(--vhOne) * 100 - 3.66667rem);
    animation: openMenu 0.3s;
}
@keyframes openMenu {
0% {
      height: 0;
      opacity: 0;
}
100% {
      height: calc(var(--vhOne) * 100 - 100px);
      opacity: 1;
}
}
.mob--car-nav .menu-list a {
    padding: 1rem;
    font-size: 0.86667rem;
    color: #ffffff;
    width: 100%;
    line-height: 1rem;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 0.03333rem solid rgba(255, 255, 255, 0.2);
}
.mob--car-nav .btn-list {
    display: flex;
    align-items: center;
    margin-left: 2rem;
    gap: 1rem;
}
.mob--car-nav .btn-list .btn {
    animation-duration: 0.6s;
    position: relative;
    overflow: hidden;
    width: 6rem;
    height: 1.6rem;
    border-radius: 6rem;
    font-size: 0.6rem;
    color: #ffffff;
}
.mob--car-nav .btn-list .btn a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% - 2PX);
    z-index: 2;
    display: block;
    border-radius: 2.66667rem;
    display: flex;
    align-items: center;
    justify-content: center;
}
.mob--car-nav .btn-list .btn::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: calc(100% - 2PX);
    height: calc(100% - 2PX);
    border: 1PX solid #ffffff;
    border-radius: 6rem;
    z-index: 0;
    box-sizing: border-box;
}
.mob--car-nav .btn-list .btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: #da251c;
    transition: width 0.3s;
    z-index: 1;
}
.mob--car-nav .btn-list .btn:hover::before {
    width: 100%;
}
.mob--car-nav .btn-list .btn:hover a {
    color: #ffffff;
}
.mob--car-nav .btn-list .btn {
    height: 1.5rem;
    width: 4.66667rem;
}
.mob--car-nav .close-btn {
    display: flex;
    width: 1.33333rem;
    height: 1.2rem;
    z-index: 9;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
    margin-left: 0.66667rem;
}
.mob--car-nav .close-btn.show span:nth-child(1) {
    width: 1.5rem;
    transform: rotate(45deg);
    transform-origin: left center;
}
.mob--car-nav .close-btn.show span:nth-child(2) {
    display: none;
}
.mob--car-nav .close-btn.show span:nth-child(3) {
    width: 1.5rem;
    transform: rotate(-45deg);
    transform-origin: left center;
}
.mob--car-nav .close-btn span {
    height: 0.13333rem;
    max-height: 0.13333rem;
    min-height: 0.13333rem;
    width: 100%;
    border-radius: 0.2rem;
    background-color: #ffffff;
    transition: all 0.3s;
}
.mob--car-nav .close-btn span:nth-child(2) {
    width: 80%;
}
}