.m-head {
  display: none;
}
.m-nav {
  display: none;
}
.hidden {
  overflow: hidden;
}
@media screen and (max-width: 1024px) {
  body {
    padding-top: 70px;
  }
  .header {
    width: 100vw;
    position: fixed;
    top: 0;
    left: 0;
    background-color: #fff;
    box-shadow: 0 0 3px rgba(0, 0, 0, 0.15);
  }
  .header > .page {
    height: 70px;
  }
  .header .logo1 {
    display: none;
  }
  .header .logo2 {
    display: block;
    height: 35px;
  }
  .header .nav {
    display: none;
  }
  .header .rg {
    display: none;
  }
  .m-head {
    display: block;
  }
  .m-head .switch {
    width: 30px;
    height: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    position: absolute;
    right: 3%;
    top: 50%;
    transform: translateY(-50%);
  }
  .m-head .switch span {
    width: 30px;
    height: 3px;
    margin-bottom: 8px;
    background-color: #003da5;
    transition: all 0.3s linear;
  }
  .m-head .switch span:last-child {
    margin-bottom: 0;
  }
  .m-nav {
    height: calc(100vh - 71px);
    overflow-y: auto;
    border-top: 1px solid #ccc;
  }
  .m-nav::-webkit-scrollbar {
    width: 3px;
  }
  .m-nav::-webkit-scrollbar-button {
    display: none;
  }
  .m-nav::-webkit-scrollbar-track {
    background-color: #f1f1f1;
  }
  .m-nav::-webkit-scrollbar-thumb {
    background-color: #003da5;
  }
  .m-nav .lg {
    display: flex;
    justify-content: center;
    margin-bottom: 60px;
    font-size: 14px;
  }
  .m-nav .m-search {
    margin: 2rem 0;
    position: relative;
  }
  .m-nav .m-search .box {
    height: 3.4375rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid #e0e3e8;
    border-radius: 27px;
    padding: 0 1.5625rem;
  }
  .m-nav .m-search .box span {
    opacity: 0.5;
  }
  .m-nav .m-search form {
    width: 100%;
  }
  .m-nav .m-search .sear-w {
    display: flex;
  }
  .m-nav .m-search .sear-w input {
    width: 100%;
    border: none;
    line-height: 3.125rem;
  }
  .m-nav .m-search .sear-w input::placeholder {
    font-size: 1rem;
    opacity: 0.5;
    color: #001842;
  }
  .m-nav .m-search .sear-w button {
    position: absolute;
    top: 0;
    right: 0;
    width: 10.625rem;
    line-height: 3.4375rem;
    border: none;
    background-color: #003da5;
    color: #fff;
    border-radius: 27px;
    cursor: pointer;
  }
  .m-nav .m-search .sear-w button i {
    color: #fff;
    margin-right: 0.625rem;
    font-size: 0.875rem;
  }
  .m-nav .m-navlist {
    border-top: 1px solid #e5e5e5;
    padding-top: 20px;
  }
  .m-nav .m-navlist > li {
    margin-bottom: 5px;
    border: 1px solid #ccc;
    border-radius: 3px;
    padding: 0 15px;
    position: relative;
  }
  .m-nav .m-navlist > li > a {
    font-weight: bold;
  }
  .m-nav .m-navlist > li a {
    display: block;
    color: #777;
    line-height: 40px;
    position: relative;
    border-color: #ccc;
  }
  .m-nav .m-navlist > li .erji2 {
    transition: all 0.3s linear;
  }
  .m-nav .m-navlist > li .erji2 a {
    height: 0;
    transform: scaleY(0);
    transform-origin: 0 0;
    overflow: hidden;
    transition: all 0.3s linear;
  }
  .m-nav .m-navlist .dir i {
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    font-size: 22px;
    font-weight: bold;
    position: absolute;
    top: 50%;
    right: -12px;
    transform: translateY(-50%);
  }
  .m-nav .m-navlist .dir i::after {
    content: "\002B";
  }
  .m-nav .m-navlist .nav-open a {
    border-bottom: 1px solid #ccc;
  }
  .m-nav .m-navlist .nav-open .erji2 {
    padding-bottom: 10px;
    transition: all 0.3s linear;
  }
  .m-nav .m-navlist .nav-open .erji2 a {
    height: 40px;
    transform: scaleY(1);
    transition: all 0.3s linear;
  }
  .m-nav .m-navlist .nav-open i::after {
    content: "\2212";
  }
  .open .m-nav {
    display: block;
  }
  .open .switch span:nth-child(2) {
    display: none;
  }
  .open .switch span:first-child {
    transform: rotateZ(45deg);
    margin-bottom: -3px;
  }
  .open .switch span:last-child {
    transform: rotateZ(-45deg);
  }
}