@media screen and (min-width: 900px) {
  .mobile {
    display: none!important;
  }
  header {
    width: 100%;
    height: 60px;
  }
  header .head-con {
    width: 1200px;
    height: 100%;
    margin: 0 auto;
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    -webkit-justify-content: space-between;
    justify-content: space-between;
  }
  header .head-con .head-img {
    align-self: center;
  }
  header .head-con .head-img .aca-logo {
    height: 36px;
  }
  header .head-con .nav {
    height: 100%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
  }
  header .head-con .nav .nav-con,
  header .head-con .nav .nav-box {
    align-self: center;
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    -webkit-justify-content: space-between;
    justify-content: space-between;
  }
  header .head-con .nav .nav-con .nav-item,
  header .head-con .nav .nav-box .nav-item {
    line-height: 1;
    border-left: 1px solid #333;
    position: relative;
  }
  header .head-con .nav .nav-con .nav-item a,
  header .head-con .nav .nav-box .nav-item a {
    display: block;
    width: 100%;
    height: 100%;
    padding: 0 20px;
    font-size: 16px;
    transition: all 0.3s;
  }
  header .head-con .nav .nav-con .nav-item:before,
  header .head-con .nav .nav-box .nav-item:before {
    opacity: 0;
    display: block;
    position: absolute;
    content: '';
    width: 15px;
    height: 5px;
    bottom: -24px;
    left: 50%;
    margin-left: -7px;
    border-radius: 5px;
    transition: all 0.3s;
  }
  header .head-con .nav .nav-con .nav-item:hover a,
  header .head-con .nav .nav-box .nav-item:hover a {
    font-weight: bold;
    color: #ac2a2a;
  }
  header .head-con .nav .nav-con .nav-item:hover:before,
  header .head-con .nav .nav-box .nav-item:hover:before {
    opacity: 1;
    bottom: -12px;
    margin-left: -15px;
    left: 50%;
    width: 30px;
    height: 5px;
    background: #ac2a2a;
  }
  header .head-con .nav .nav-con .active a,
  header .head-con .nav .nav-box .active a {
    color: #ac2a2a;
  }
  header .head-con .nav .nav-con .active:before,
  header .head-con .nav .nav-box .active:before {
    opacity: 1;
    bottom: -12px;
    margin-left: -15px;
    left: 50%;
    width: 30px;
    height: 5px;
    background: #ac2a2a;
  }
  header .head-con .nav .nav-con .nav-item:first-child,
  header .head-con .nav .nav-box .nav-item:first-child {
    border-left: 0;
  }
  header .head-text {
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
  }
  header .head-text svg {
    align-self: center;
    font-size: 25px;
    color: #1262b2;
    margin-right: 5px;
  }
  header .head-text span {
    align-self: center;
    color: #1262b2;
    font-size: 20px;
    font-weight: bold;
  }
}
@media screen and (max-width: 900px) {
  header {
    width: 100%;
  }
  header .top {
    width: 100%;
    height: 15vw;
    margin: 0 auto;
    background: #fff;
  }
  header .top .head-img {
    height: 15vw;
    display: table-cell;
    vertical-align: middle;
  }
  header .top .head-img img {
    height: 7.5vw;
    margin-left: 7vw;
  }
  header .top .head-img img + img {
    height: 4.5vw;
  }
  header .top .head-text {
    display: none!important;
  }
  header .head-con {
    width: 100%;
    background: #ac2a2a;
  }
  header .head-con .head-img {
    display: none;
  }
  header .head-con .nav {
    width: 100%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    position: relative;
  }
  header .head-con .nav .nav-con {
    width: 90%;
    height: 100%;
    line-height: 12vw;
    padding: 3vw 0;
    overflow-x: scroll;
    overflow-y: hidden;
  }
  header .head-con .nav .nav-con .nav-box {
    color: #fff;
    font-size: 0;
    align-self: center;
    display: -webkit-box;
  }
  header .head-con .nav .nav-con .nav-item {
    line-height: 1;
    border-left: 1px solid #fff;
    position: relative;
    width: auto;
    padding: 0;
    text-align: center;
    color: #fff;
    font-size: 4.2vw;
  }
  header .head-con .nav .nav-con .nav-item a {
    display: block;
    width: 100%;
    height: 100%;
    padding: 0 20px;
    font-size: 16px;
    color: #fff;
    transition: all 0.3s;
  }
  header .head-con .nav .nav-con .nav-item:before {
    opacity: 0;
    display: block;
    position: absolute;
    content: '';
    width: 15px;
    height: 5px;
    bottom: -24px;
    left: 50%;
    margin-left: -7px;
    border-radius: 5px;
    transition: all 0.3s;
  }
  header .head-con .nav .nav-con .active:before {
    opacity: 1;
    bottom: -12px;
    margin-left: -15px;
    left: 50%;
    width: 30px;
    height: 5px;
    background: #ac2a2a;
  }
  header .head-con .nav .nav-con .nav-item:first-child {
    border-left: 0;
  }
  header .head-con .nav-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 2vw;
  }
  header .head-con .nav-menu-btn svg {
    font-size: 5vw;
    color: #fff;
  }
  header .nav-menu {
    transform: translateY(-140vh);
    transition: all 0.3s;
    width: 100vw;
    height: 100vh;
    background: #f6f6f6;
    position: fixed;
    left: 0;
    top: 0;
    padding: 15vw 5vw;
    z-index: 11;
  }
  header .nav-menu .top {
    position: absolute;
    top: 0;
    left: 0;
  }
  header .nav-menu .nav-menu-con .nav-title {
    margin-top: 3vw;
    font-size: 4.2vw;
    font-weight: bold;
  }
  header .nav-menu .nav-menu-con .nav-box {
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 10vw;
  }
  header .nav-menu .nav-menu-con .nav-box .nav-item {
    margin-top: 5vw;
    width: 25vw;
    padding: 1vw 0;
    background: #fff;
    box-shadow: 1px 1px 8px 0 #dbe1f5, -1px -1px 8px 0 #ffffff;
    text-align: center;
    margin-right: 7.5vw;
  }
  header .nav-menu .nav-menu-con .nav-box .nav-item a {
    font-weight: 200;
    font-size: 4vw;
  }
  header .nav-menu .nav-menu-con .nav-box .nav-item:nth-child(3n) {
    margin-right: 0;
  }
  header .nav-menu .nav-menu-close {
    position: absolute;
    top: 18.5vw;
    right: 3vw;
  }
  header .nav-menu .nav-menu-close svg {
    font-size: 4vw;
    color: #333;
  }
  header .nav-menu-active {
    transform: translateY(0);
  }
}