article {
  background: #fff url(../images/about_bg.jpg) no-repeat 0 0 fixed;
  background-size: auto 100%;
}

.com-top {
  padding-bottom: 0.4rem;
}

.part2-li-icon {
  display: none;
}

.part2-li-arrow {
  display: none;
}

@media (min-width: 1200px) {
  article {
    min-height: 100vh;
    padding: 10vw 0 5vw;
    background: #fff url(../images/about_bg.jpg) no-repeat 0 bottom fixed;
    background-size: 44.5vw;
  }

  .com-main {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding-left: 18vw;
  }

  .com-top {
    display: flex;
    width: 10vw;
  }

  .com-ch {
    width: 2.5vw;
    font-size: 2.4vw;
    line-height: 1;
    writing-mode: vertical-lr;
  }

  .com-bread {
    width: 0.9vw;
    margin-left: 1vw;
    text-align: center;
  }

  .about {
    width: 72vw;
    padding: 0 18vw 4vw 4vw;
    background: #eef1f8 url(../images/about_map.png) no-repeat right 8vw/51vw;
  }

  .com-nav {
    padding: 0;
  }

  .com-nav ul {
    display: flex;
  }

  .com-nav ul li {
    padding-right: 2vw;
  }

  .com-nav ul a {
    display: block;
    width: 7.2vw;
    padding: 2.4vw 0 0.2vw;
    text-align: center;
    transition: 0.3s;
  }

  .part2-li-icon {
    display: block;
    position: relative;
    overflow: hidden;
  }

  .part2-li-icon i {
    display: block;
    transition: 0.3s;
  }

  .part2-li-icon span {
    position: absolute;
    z-index: 10;
    left: 0;
    top: 0;
    width: 100%;
    opacity: 0;
    transform: translate3d(0, 100%, 0);
    transition: 0.3s;
  }

  .part2-li-icon img {
    width: 2.4vw;
  }

  .part2-li-name {
    padding-top: 0.4vw;
    font-size: 0.9vw;
    line-height: 1.6vw;
    color: #333;
  }

  .part2-li-arrow {
    display: block;
    text-align: center;
    opacity: 0;
    transition: 0.3s;
  }

  .part2-li-arrow img {
    width: 0.8vw;
  }

  .com-nav ul li a:hover {
    transform: translate3d(0, -1vw, 0) scale(1);
    background: #da1617;
  }

  .com-nav ul a:hover .part2-li-icon i {
    opacity: 0;
    transform: translate3d(0, -100%, 0);
  }

  .com-nav ul a:hover .part2-li-icon span {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }

  .com-nav ul a:hover .part2-li-name {
    color: #fff;
  }

  .com-nav ul a:hover .part2-li-arrow {
    opacity: 1;
  }
  /*  */
  .com-nav ul li.active a {
    transform: translate3d(0, -1vw, 0) scale(1);
    background: #da1617;
  }

  .com-nav ul .active .part2-li-icon i {
    opacity: 0;
    transform: translate3d(0, -100%, 0);
  }

  .com-nav ul .active .part2-li-icon span {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }

  .com-nav ul .active .part2-li-name {
    color: #fff;
  }

  .com-nav ul .active .part2-li-arrow {
    opacity: 1;
  }

  .about-title {
    padding: 1vw 0 2vw 0;
  }

  .about-title .ch {
    font-size: 0.9vw;
    line-height: 1.2vw;
    color: #da1617;
  }

  .about-title .en {
    padding-bottom: 1.2vw;
    font-size: 12px;
    line-height: 16px;
    color: #999999;
    text-transform: uppercase;
    background: url(../images/red_line.png) no-repeat 0 bottom;
  }

  .about-ad {
    padding: 0 0 2vw;
    font-size: 1.2vw;
    line-height: 1.4vw;
    color: #333;
  }

  .about-p {
    min-height: 10vw;
    font-size: 0.9vw;
    line-height: 1.2vw;
    color: #333;
  }
}