@media screen and (min-width: 500px) {
  li {
    list-style: none;
  }
  a {
    color: #000;
    text-decoration: none;
  }
  div.nav-header {
    z-index: 2000;
  }
  div.nav-header div.nav {
    background-size: cover;
    z-index: 2000;
  }
  div.nav-header div.nav header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: aquamarine;
    box-sizing: border-box;
    min-width: 1440px;
    z-index: 2000;
  }
  div.nav-header div.nav header section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 68px;
    transition: all 0.3s;
  }
  div.nav-header div.nav header section.up {
    top: 0;
    height: 40px;
    opacity: 0;
  }
  div.nav-header div.nav header section.up div.left {
    color: #FFFFFF;
  }
  div.nav-header div.nav header section.up div.left span {
    font-size: 14px;
    font-family: PingFangSC-Regular, "PingFang SC";
    font-weight: 400;
  }
  div.nav-header div.nav header section.up div.left span:last-child {
    cursor: pointer;
  }
  div.nav-header div.nav header section.up ul.right {
    display: flex;
  }
  div.nav-header div.nav header section.up ul li {
    padding: 0 20px;
  }
  div.nav-header div.nav header section.up ul.right li a {
    font-size: 14px;
    font-family: PingFangSC-Regular, "PingFang SC";
    font-weight: 400;
    color: #FFFFFF;
  }
  div.nav-header div.nav header section.down {
    top: 40px;
    height: 60px;
  }
  div.nav-header div.nav header section.down div.left {
    display: flex;
    align-items: center;
  }
  div.nav-header div.nav header section.down div.left div.logo {
    display: flex;
    align-items: center;
  }
  div.nav-header div.nav header section.down div.left div.logo img {
    width: 32px;
    height: 32px;
  }
  div.nav-header div.nav header section.down div.left div.logo span {
    padding-left: 10px;
    font-size: 18px;
    font-family: Alibaba-PuHuiTi-M, Alibaba-PuHuiTi;
    font-weight: normal;
    color: #FFFFFF;
  }
  div.nav-header div.nav header section.down div.left ul {
    padding-left: 30px;
    display: flex;
    overflow: hidden;
    height: 32px;
  }
  div.nav-header div.nav header section.down div.left ul li {
    padding: 0 34px;
    flex-shrink: 1;
    position: relative;
    transition: all 0.3s;
    line-height: 32px;
  }
  div.nav-header div.nav header section.down div.left ul li a {
    font-size: 16px;
    font-family: PingFangSC-Regular, "PingFang SC";
    font-weight: 400;
    color: #fff;
  }
  div.nav-header div.nav header section.down div.left ul li.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: calc(50% - 6px);
    width: 12px;
    height: 3px;
    background: #fff;
    border-radius: 2px;
  }
  div.nav-header div.nav header section.down div.right {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    flex: 1;
  }
  div.nav-header div.nav header section.down div.right aside.phone {
    flex-shrink: 0;
  }
  div.nav-header div.nav header section.down div.right aside.phone img {
    width: 17px;
    height: 17px;
  }
  div.nav-header div.nav header section.down div.right aside.phone a {
    font-size: 20px;
    font-family: PingFangSC-Semibold, "PingFang SC";
    font-weight: 600;
    color: #fff;
  }
  div.nav-header div.nav header section.down div.right aside.action {
    display: flex;
    align-items: center;
  }
  div.nav-header div.nav header section.down div.right aside.action div.login {
    padding-left: 40px;
    font-size: 16px;
    font-family: PingFangSC-Regular, "PingFang SC";
    font-weight: 400;
  }
  div.nav-header div.nav header section.down div.right aside.action div.login a {
    color: #fff;
  }
  div.nav-header div.nav header section.down div.right aside.action div.login span {
    color: #fff;
    padding: 0 32px;
  }
  div.nav-header div.nav header section.down div.right aside.action div.exit {
    display: flex;
    align-items: center;
    padding-left: 40px;
  }
  div.nav-header div.nav header section.down div.right aside.action div.exit a {
    font-size: 16px;
    font-family: "PingFangSC-Regular", "PingFang SC";
    font-weight: 400;
    color: #FFFFFF;
    flex-shrink: 0;
  }
  div.nav-header div.nav header section.down div.right aside.action div.exit a:last-child {
    padding-left: 24px;
    cursor: pointer;
  }
  div.nav-header div.nav header section.down div.right aside.action div.exit a:first-child {
    max-width: 7.5em;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
  }
  div.nav-header div.nav header section.down div.right aside.action div.system {
    cursor: pointer;
    padding-left: 40px;
  }
  div.nav-header div.nav header section.down div.right aside.action div.system a {
    display: inline-block;
    width: 104px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    background: #F2F2FD;
    border-radius: 20px;
    font-size: 14px;
    font-family: PingFangSC-Regular, "PingFang SC";
    font-weight: 400;
    color: #333333;
  }
  div.mobile {
    display: none;
  }
}
@media screen and (max-width: 1480px) {
  div.nav-header div.nav header section.down div.left ul li {
    padding: 0 24px;
  }
}
@media screen and (max-width: 499px) {
  div.pc {
    display: none;
  }
  li {
    list-style: none;
  }
  a {
    text-decoration: none;
  }
  div.nav.mobile {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 40px;
    padding: 12px 15px;
    transition: all 0.3s;
    z-index: 2000;
  }
  div.nav.mobile section.bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 100%;
  }
  div.nav.mobile section.bar div.left {
    display: flex;
    align-items: center;
  }
  div.nav.mobile section.bar div.left img {
    width: 130px;
    /*height: 16px;*/
  }
  div.nav.mobile section.bar div.left span {
    padding-left: 5px;
    font-size: 9px;
    font-family: "Alibaba-PuHuiTi-M", "Alibaba-PuHuiTi";
    font-weight: normal;
    color: #FFFFFF;
  }
  div.nav.mobile section.bar div.right img {
    width: 12px;
    height: 10px;
  }
  div.nav.mobile div.shadow {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: 2000;
    visibility: hidden;
  }
  div.nav.mobile div.shadow.show {
    visibility: visible;
  }
  div.nav.mobile div.shadow.show section.list {
    right: 0;
  }
  div.nav.mobile div.shadow section.list {
    position: absolute;
    top: 0;
    right: -60%;
    bottom: 0;
    background-color: #fff;
    padding: 15px 20px 0 50px;
    box-sizing: border-box;
    width: 60%;
    overflow-y: auto;
    transition: all 0.3s;
  }
  div.nav.mobile div.shadow section.list div.close {
    display: flex;
    justify-content: flex-end;
  }
  div.nav.mobile div.shadow section.list div.close img {
    width: 16px;
    height: 16px;
  }
  div.nav.mobile div.shadow section.list ul {
    width: 100%;
    text-align: left;
    padding-top: 30px;
  }
  div.nav.mobile div.shadow section.list ul li a {
    padding: 13px 0;
    font-size: 15px;
    font-family: "PingFangSC-Regular", "PingFang SC";
    font-weight: 400;
    color: #333;
    display: block;
  }
  div.nav.mobile div.shadow section.list ul li a.active {
    color: #eee;
    background-color: #5147e7;
  }
}