@media screen and (max-width: 750px) {
  /* ==================== 全局变量和基础设置 ==================== */
  html {
    font-size: 13.3333vw !important;
    overflow-x: hidden;
  }

  body {
    overflow-x: hidden;
  }

  .wrap {
    width: 100%;
    padding: 0 0.24rem;
  }
  
  #order1, #order2, #order3, #order4 {
    position: relative;
    top: -.88rem;
  }
  
  /* ==================== 显示/隐藏工具类 ==================== */
  .is_pc,
  .is_pc_flex {
    display: none !important;
  }

  .is_mobile {
    display: block !important;
  }

  .is_mobile_flex {
    display: flex !important;
  }

  /* ==================== 导航栏样式 ==================== */
  .pc_nav {
    margin-top: 0px !important;
    width: 100vw;
    height: 0.87rem;
    line-height: 0.87rem;
  }

  .section {
    padding: .6rem 0;
    overflow: hidden;
  }

  .height110 {
    height: 0;
  }

  .nav .nav_logo {
    height: 0.88rem;
    display: flex;
    align-items: center;
  }

  .nav .nav_logo img {
    width: 2.72rem;
    margin-left: 0.3rem;
  }

  .nav_list {
    display: none;
    position: fixed;
    top: 0.8rem;
    right: 0;
    background: #fff;
    width: 4rem;
  }

  .nav_list li {
    padding: 0 0.4rem;
    height: 0.96rem;
  }

  .nav_list ul {
    display: block;
  }

  .nav {
    height: 0.88rem;
    background: #fff;
    position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    z-index: 22;
  }

  .nav_list li.active:after {
    width: .06rem;
    height: .6rem;
    left: 0;
    top: 50%;
    transform: translate(0, -50%);
  }

  .nav_list li a {
    display: block;
    line-height: 0.8rem;
    font-size: 0.3rem;
    color: #1D252D;
    line-height: 0.96rem;
  }
  .nav_list li.active a {
    font-weight: bold;
  }
  .menu_icon {
    position: absolute;
    right: 0;
    top: 0;
    height: 0.88rem;
    width: 0.88rem;
    background: url(../images/menu.png) center center no-repeat;
    background-size: 0.48rem 0.48rem;
  }

  .menu_icon.menu_hide {
    background: url(../images/menu_close.png) center center no-repeat;
    background-size: 0.48rem 0.48rem;
  }

}