/* 动态调整 body 字号 */
@media (max-width: 1700px) {
  .tit_h2 {
    font-size: 2.8em;
  }
}

@media (max-width: 1600px) {
  body {
    font-size: 14px;
    /* 在小屏幕上减小字号 */
  }

  .tit_h2 {
    font-size: 3em;
  }

  .card h3 {
    font-size: 1.6em;
  }

  .card .img {
    height: 17rem;
  }
}

@media (max-width: 1400px) {
  body {
    font-size: 12px;
    /* 在小屏幕上减小字号 */
  }

  .guanzhu {
    padding: 4em 0;
  }

  .card .img {
    height: 14rem;
  }
}

@media (max-width: 1300px) {
  body {
    font-size: 10px;
    /* 在小屏幕上减小字号 */
  }
}

@media (max-width: 1200px) {
  body {
    font-size: 10px;
    /* 在小屏幕上减小字号 */
  }

  .footer-right {
    gap: 5em;
  }

  nav {
    gap: 3em;
  }
}

@media (max-width: 780px) {
  .inside_box {
    display: block;
  }

  .project_info img {
    width: 100%;
  }

  .inside_left_w {
    width: 100%;
  }

  .inside_right_w {
    width: 100%;
  }

  .contact_list li:first-child {
    border-top: none;
  }

  .contact_list li:last-child {
    border-bottom: none;
  }

  .tit_h2 {
    font-size: 2.5em;
  }

  /* .brand_tit,
  .inside_gap,
  .footer,
  .information,
  .inside_title,
  .news_data,
  .news_list {
    display: block;
  } */

  .inside_tit_left {
    display: inline-flex;
    margin-bottom: 3em;
  }

  .brand_tit .inside_h2,
  .brand_tit .brand_tit_txt,
  .brand_list3,
  .brand_swiper,
  .brand_box_left,
  .inside_gap,
  .about_us_left,
  .about_us_right,
  .project_box_left,
  .project_box_right,
  .news_list li,
  .detail_box .info {
    width: 100%;
  }

  .footer-left {
    max-width: 100%;
  }

  .brand_tit .brand_tit_txt {
    margin-top: 1.5em;
  }

  /* .about_us_right,
  .project_box_right,
  .inside_tit_tab,
  .news_list li,
  .inside_tit_rbox,
  .detail_box {
    margin-top: 3em;
  } */

  .inside_btn .bicon img {
    width: 50%;
  }

  .pleft_bot {
    margin-top: 5em;
  }

  .i_swiper .left_txt {
    font-size: 3em;
  }

  .i_swiper .right_txt {
    font-size: 1.5em;
    margin-top: .6em;
  }

  .project_box_left .txt {
    font-size: 1.4em;
  }

  .pleft_top .top_icon {
    left: auto;
    right: 2em;
    width: 6em;
  }

  .inside_project .pleft_bot {
    margin-top: 3em;
  }

  /* .i_swiper .swiper_info {
    height: 70%;
    display: block;
  } */
  .i_swiper .swiper_info {
    bottom: 12em;
    align-items: flex-start;
  }

  .section {
    /* padding: 3em 0; */
    min-height: 40vh;
  }

  .news_swiper {
    margin-top: 2em;
  }

  .brand_box {
    padding-bottom: 3em;
  }

  .footer-right {
    display: block;
    margin-top: 3em;
  }

  .detail_box {
    padding: 3em 0;
  }

  .footer-left .contact-info,
  .footer-nav ul li a {
    font-size: 1.5em;
  }

  .footer-nav {
    margin-top: 1.3em;
  }

  .footer-nav h4 {
    font-size: 1.3em;
  }

  .footer-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 1.3em;
  }

  .logo {
    width: 35px;
    height: 43px;
  }

  .search-box {
    width: 14em;
  }

  nav {
    width: 100%;
    height: 100vh;
    right: 0;
    top: -100vh;
    position: fixed;
    z-index: -1;
    display: block;
    padding: 2em;
    text-align: center;
    background-color: var(--page-color);
    /* display: none; */
    transition: all .7s;
  }

  nav.showNav {
    top: 6.6em;
  }

  header {
    background-color: var(--page-color);
  }

  header::after {
    display: none;
    content: '';
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, .5);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
  }

  nav a {
    text-align: left;
    padding: 1em 0;
  }

  nav a::after {
    bottom: 0;
  }

  .section-w {
    padding-left: 3em;
    padding-right: 3em;
    display: block;
  }

  header {
    display: flex !important;
  }

  .inside_box {
    margin: 5em 0 5em;
  }

  .inside_h2 {
    margin-top: 1.5em;
  }

  .h_header {
    height: 77px;
  }

  .brand_list {
    display: block;
    padding-top: 0;
  }

  .brand_list li {
    width: 100%;
    margin-top: 2em;
  }

  .hire_list li {
    padding: 1.5em 0;
  }

  .hire_list li .txt {
    font-size: 1.5em;
  }

  .inside_gap {
    margin-top: 2em;
  }

  .menu-toggle {
    display: flex;
  }

  header .search-box {
    display: none;
  }

  nav a.active::after,
  nav a:hover::after {
    width: 5rem;
  }

  .card .img {
    height: 22rem;
  }

  .v_top {
    margin-top: 0;
  }

  .v_bot {
    margin-top: 17em;
  }

  .v_bot .txt {
    word-break: break-word;
    font-size: 12px;
    height: 90px;
    overflow: hidden;
  }

  .footer-right {
    display: none;
  }

  .about_us {
    background-image: url(../images/home-about.png);
    background-size: contain;
  }

  .footer_box {
    background-image: url(../images/home-contact.png);
    background-position: center 78%;
  }

  .brand_box::after {
    background-image: url(../images/h5_img02.png);
    top: -4em;
  }

  .project_box_left {
    margin-bottom: 2em;
  }

  .brand_section .b_bg::after {
    display: none;
  }

  .video-player video {
    min-height: 24em;
  }

  .mission_box {
    margin-top: 4em;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 8px;
  }

  .value_swiper {
    height: 50%;
  }

  .value_swiper .swiper-slide>img {
    height: 460px;
    object-fit: cover;
    width: 100%;
  }

  .card .img {
    height: 220px;
  }

  .moreList .card .img {
    height: 13rem;
  }

  .card p {
    font-size: 12px;
    height: auto;
    max-height: 40px;
  }

  .value_swiper .swiper-pagination {
    bottom: 14%;
  }

  .mission_box {
    height: 350px;
  }

  .mission_info {
    padding-top: 6em;
  }

  .mission_box>img {
    border-radius: 4px;
  }
}