* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
a {
  text-decoration: none;
}
ul li {
  list-style-type: none;
}
body {
  width: 100vw;
  overflow-x: hidden;
}
/* 当屏幕宽度小于等于 768px 时，应用以下样式 */
@media (max-width: 768px) {
  header {
    height: 50px;
    width: 100%;
    margin: 0;
    background-color: #f3f6fd;
    padding: 0 10px;
  }
  header .content {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  header .content .title a {
    height: 30px;
  }
  header .content .title a img {
    height: 30px;
    width: auto;
  }
  main .b_title {
    padding: 10px 0;
    text-align: center;
    font-size: 24px;
  }
  main .b_title > span {
    font-size: 30px;
    color: #1966ff;
    margin-right: 0.5rem;
    text-align: center;
  }
  main .b_title > span:last-child {
    margin: 0 0 0 0.8rem;
  }
  main .bg {
    width: 100%;
    background-image: url(../img/bg.png);
    background-size: cover;
    background-position: 50% 50%;
    background-repeat: no-repeat;
    position: relative;
    box-sizing: border-box;
    padding: 0 10px;
    display: flex;
    min-height: 600px;
    max-height: 700px;
    align-items: center;
  }
  main .bg .title {
    width: 300px;
    font-size: 12px;
    line-height: 23px;
    color: white;
  }
  main .bg .title p {
    text-indent: 2em;
  }
  main .bg .title h3 {
    font-size: 24px;
    text-align: left;
    margin-bottom: 30px;
  }
  main .business {
    width: 100%;
    margin: 0 auto 20px;
    background-color: #fdfdff;
  }
  main .business .items {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  main .business .items .item {
    height: 300px;
    width: 60%;
    border: #76a8e1 2px solid;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px;
    margin-bottom: 20px;
  }
  main .business .items .item > img {
    width: 120px;
  }
  main .business .items .item > h5 {
    font-size: 20px;
    padding: 10px 0;
  }
  main .business .items .item > p {
    font-size: 16px;
    color: #474e5c;
  }
  main .activity {
    width: 100%;
    background: linear-gradient(to right bottom, #deeafe, #eff6ff, #deeafe);
  }
  main .activity .items {
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
  }
  main .activity .items .item {
    width: 50%;
    height: 350px;
    padding: 10px;
    box-sizing: border-box;
  }
  main .activity .items .item > div {
    width: 100%;
    height: 100%;
    border-radius: 0.5rem;
    background: linear-gradient(to top right, #dff4fe, #fff);
    box-shadow: 1px 1px 10px 1px rgba(58, 75, 101, 0.16);
    display: flex;
    flex-direction: column;
    padding: 10px 5px;
    align-items: center;
    justify-content: center;
  }
  main .activity .items .item > div > img {
    width: 100px;
  }
  main .activity .items .item > div > h5 {
    margin: 24px 0px;
    font-size: 20px;
  }
  main .activity .items .item > div p {
    font-size: 16px;
    color: #666666;
    text-align: center;
  }
  main .news {
    width: 100%;
    margin: 0 auto 10px;
  }
  main .news .advertising {
    margin: 0 auto;
    width: 294px;
    height: 400px;
    position: relative;
    overflow: hidden;
  }
  main .news .advertising ul {
    width: 2100px;
    height: 100%;
    position: absolute;
  }
  main .news .advertising ul li {
    display: inline-block;
    width: 300px;
    height: 100%;
    margin-right: -6px;
  }
  main .news .advertising ul li img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  main .jiaobiao {
    width: 180px;
    height: 8px;
    position: absolute;
    bottom: 25px;
    right: 50%;
    margin-right: -90px;
  }
  main .jiaobiao > i {
    cursor: pointer;
    display: block;
    float: left;
    width: 25px;
    height: 8px;
    margin-right: 5px;
    background-color: #dadada;
  }
  footer {
    background-color: #364154;
    padding: 10px;
    color: white;
  }
  footer a {
    font-size: 12px !important;
  }
  footer .container {
    max-width: 100%;
    margin: 0 auto;
  }
  footer .container b {
    font-weight: normal;
  }
  footer .container .footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    text-align: center;
    font-size: 12px !important;
  }
  footer .container .footer-content .company-name {
    font-weight: bold;
  }
  footer .container .footer-content .company-address,
  footer .container .footer-content .company-zip,
  footer .container .footer-content .company-phone,
  footer .container .footer-content .company-email {
    margin: 0 10px;
  }
  footer .container a {
    color: white;
  }
  footer .container a:hover {
    color: #ccc;
  }
}
@media (min-width: 769px) {
  .banxin {
    width: 1200px;
    margin: 0 auto;
  }
  header {
    height: 70px;
    width: 100%;
    margin: 0;
    background-color: #f3f6fd;
  }
  header .content {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  header .content .title a {
    height: 38px;
  }
  header .content .title a img {
    height: 38px;
    width: auto;
  }
  header .content nav {
    display: flex;
  }
  header .content nav .box {
    margin-right: 2.5rem;
    color: black;
    font-weight: 700;
    font-size: 18px;
    cursor: pointer;
  }
  header .content nav .box:hover {
    color: #1966ff;
  }
  header .content nav .act {
    color: #1966ff;
  }
  header .content .phone {
    font-size: 16px;
    display: flex;
    align-items: center;
    vertical-align: sub;
  }
  header .content .phone svg {
    height: 40px;
    width: auto;
  }
  main {
    /* 轮播图1 */
  }
  main .bg {
    width: 100%;
    background-image: url(../img/bg.png);
    background-size: cover;
    background-position: 50% 50%;
    background-repeat: no-repeat;
    position: relative;
    box-sizing: border-box;
    padding: 0 calc((100% - 1200px)/2);
    display: flex;
    min-height: 600px;
    max-height: 700px;
    align-items: center;
  }
  main .bg .title {
    width: 550px;
    font-size: 16px;
    line-height: 30px;
    color: white;
  }
  main .bg .title p {
    text-indent: 2em;
  }
  main .bg .title h3 {
    font-size: 24px;
    text-align: left;
    margin-bottom: 30px;
  }
  main .wrap {
    position: relative;
    z-index: 9;
    width: 1200px;
    margin: 0px auto;
    top: -50px;
    display: none;
  }
  main .wrap .box {
    margin: 0 auto;
    background-color: #f6f9ff;
    display: flex;
    width: 100%;
    box-shadow: 1px 1px 10px 1px rgba(58, 75, 101, 0.16);
    padding: 30px 0;
  }
  main .wrap .box > div {
    width: 20%;
    font-size: 18px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    border-left: 0.1rem solid #dee0e4;
  }
  main .wrap .box > div > p:first-child {
    color: #1966ff;
    font-size: 1.2rem;
  }
  main .wrap .box > div:first-child {
    border: none;
  }
  main .b_title {
    padding: 20px 0;
    text-align: center;
    font-size: 30px;
  }
  main .b_title > span {
    font-size: 30px;
    color: #1966ff;
    margin-right: 0.5rem;
    text-align: center;
  }
  main .b_title > span:last-child {
    margin: 0 0 0 0.8rem;
  }
  main .business {
    width: 1200px;
    margin: 0 auto 20px;
    background-color: #fdfdff;
  }
  main .business .items {
    width: 100%;
    display: flex;
    justify-content: space-around;
  }
  main .business .items .item {
    height: 400px;
    width: 25%;
    border: #76a8e1 0.1rem solid;
    border-radius: 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
  }
  main .business .items .item > img {
    width: 7rem;
    height: 7rem;
  }
  main .business .items .item > h5 {
    font-size: 22px;
    padding: 15px 0;
  }
  main .business .items .item > p {
    color: #474e5c;
    font-size: 16px;
  }
  main .activity {
    width: 100%;
    background: linear-gradient(to right bottom, #deeafe, #eff6ff, #deeafe);
  }
  main .activity .items {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
  }
  main .activity .items .item {
    width: 400px;
    height: 400px;
    padding: 20px;
    box-sizing: border-box;
  }
  main .activity .items .item > div {
    width: 100%;
    height: 100%;
    border-radius: 0.5rem;
    background: linear-gradient(to top right, #dff4fe, #fff);
    box-shadow: 1px 1px 10px 1px rgba(58, 75, 101, 0.16);
    display: flex;
    flex-direction: column;
    padding: 20px 20px;
    align-items: center;
    justify-content: center;
  }
  main .activity .items .item > div > img {
    width: 100px;
  }
  main .activity .items .item > div > h5 {
    margin: 24px;
    font-size: 20px;
  }
  main .activity .items .item > div p {
    font-size: 16px;
    color: #666666;
    text-align: center;
  }
  main .news {
    width: 1200px;
    margin: 0 auto 20px;
  }
  main .news .advertising {
    margin: 0 auto;
    width: 794px;
    height: 400px;
    position: relative;
    overflow: hidden;
  }
  main .news .advertising ul {
    width: 6000px;
    height: 100%;
    position: absolute;
  }
  main .news .advertising ul li {
    display: inline-block;
    width: 800px;
    height: 100%;
    margin-right: -6px;
  }
  main .news .advertising ul li img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  main .jiaobiao {
    width: 180px;
    height: 8px;
    position: absolute;
    bottom: 25px;
    right: 35px;
  }
  main .jiaobiao > i {
    cursor: pointer;
    display: block;
    float: left;
    width: 25px;
    height: 8px;
    margin-right: 5px;
    background-color: #dadada;
  }
  footer {
    background-color: #364154;
    padding: 40px calc((100% - 1200px)/2);
    color: white;
    font-size: 14px;
  }
  footer .container {
    max-width: 1200px;
    margin: 0 auto;
  }
  footer .container .footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    text-align: center;
  }
  footer .container .footer-content .company-name {
    font-weight: bold;
  }
  footer .container .footer-content .company-address,
  footer .container .footer-content .company-zip,
  footer .container .footer-content .company-phone,
  footer .container .footer-content .company-email {
    margin: 0 10px;
  }
  footer .container a {
    color: white;
  }
  footer .container a:hover {
    color: #ccc;
  }
}