@media screen and (min-width: 751px) {
  body {
    margin: 0;
    padding: 0;
    background-color: #0048d2;
  }
  .bg-top {
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
    /* height: 1418px;
          background: url("./img/top-bg.png");
          background-size: contain; */
  }

  .main {
    width: 1220px;
    min-height: 100vh;
    margin: 0 auto;
    position: relative;
    z-index: 1;
  }

  .top-banner {
    /* width: 100%; */
    height: 772px;
    position: relative;
    background: url("../img/top-banner.png");
    margin-top: 78px;
  }

  .logo1 {
    position: relative;
    top: -1px;
    left: 8px;
  }

  .logo2 {
    position: relative;
    top: -12px;
    left: 32px;
  }

  .link_box {
    position: fixed;
    top: 50%;
    right: 50px;
    margin-top: -201px;
    width: 203px;
    height: 394px;
    background: url(../img/bg_robot.png) no-repeat 100% 100%;
    z-index: 9999;
  }
  .link-content {
    position: relative;
    top: 100px;
  }
  .link_text {
    display: block;
    height: 40px;
    text-align: center;
    margin-top: 32px;
  }
  .link_text img {
    display: inline-block;
    /*  margin: 20px auto; */
  }

  .part1 {
    width: 1163px;
    height: 493px;
    background: #ffffff;
    border: 3px solid #422106;
    border-radius: 12px;
    margin-top: 87px;
    position: relative;
    z-index: 99;
  }

  .top1 {
    position: absolute;
    left: 454.06px;
    top: -32px;
    z-index: 999;
  }

  .video_bg_line4 {
    position: absolute;
    top: -37px;
    right: -37px;
  }

  .video_bg_line1 {
    position: absolute;
    left: -232.94px;
    top: 55px;
    z-index: 1;
  }
  .bg2 {
    position: absolute;
    top: 1844px;
  }
  .bg3 {
    position: absolute;
    right: 0;
    top: 1293px;
  }
  .video_box {
    display: flex;
    z-index: 99;
    box-sizing: border-box;
    padding-top: 104px;
    position: relative;
    height: 100%;
    background: #fff;
    border-radius: 12px;
  }
  .box1 {
    width: 449px;
    height: 305px;
    background: url(../img/cover-01.png);
    margin-left: 105px;
    position: relative;
  }

  .box2 {
    width: 449px;
    height: 305px;
    background: url(../img/cover-02.png);
    margin-left: 75px;
    position: relative;
  }
  .play_video {
    cursor: pointer;
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
  }

  .yellow_box {
    display: none;
    width: 383px;
    height: 45px;
    background: #fbc312;
    border: 3px solid #422106;
    border-radius: 6px;
    position: absolute;
    top: 260px;
    left: -26px;
  }
  .video_intro {
    font-size: 16px;
    font-family: Source Han Sans SC, Source Han Sans SC-Bold;
    font-weight: 700;
    text-align: left;
    color: #422106;
    position: absolute;
    top: 13px;
    left: 19px;
  }
  .part2 {
    width: 100%;
    margin-top: 68px;
    position: relative;
  }
  .top2 {
    position: absolute;
    left: 50%;
    transform: translate(-50%);
  }
  .star2 {
    position: absolute;
    top: 10px;
    right: 180px;
  }

  .mid_text1 {
    font-size: 24px;
    font-family: Source Han Sans SC, Source Han Sans SC-Medium;
    font-weight: 500;
    text-align: left;
    color: #ffffff;
    letter-spacing: 1.2px;
    position: absolute;
    left: 50%;
    top: 112px;
    transform: translate(-50%);
  }
  .live_box {
    padding-top: 187px;
  }
  .mid_text2 {
    font-size: 24px;
    font-family: Source Han Sans SC, Source Han Sans SC-Medium;
    font-weight: 500;
    text-align: left;
    color: #ffffff;
    letter-spacing: 1.2px;
    text-align: center;
    margin-top: 50px;
  }

  .people_box {
    margin-top: 40px;
  }

  .swiper-button-prev {
    background: url(../img/btn_left.png);
    width: 39.5px;
    height: 59px;
  }
  .swiper-button-next {
    background: url(../img/btn_right.png);
    width: 39.5px;
    height: 59px;
  }

  .circle {
    position: absolute;
    top: 2050px;
    right: 107.32px;
  }

  .part3 {
    width: 1173px;
    height: 433px;
    background: #ffffff;
    border: 3px solid #422106;
    border-radius: 12px;
    margin-top: 110px;
    position: relative;
    z-index: 99;
  }

  .top3 {
    position: absolute;
    left: 50%;
    top: -32px;
    transform: translate(-50%);
    z-index: 999;
  }

  .star1 {
    position: absolute;
    left: -225px;
  }

  .line2 {
    position: absolute;
    left: 1163px;
    top: -30px;
  }

  .company_name {
    background: url(../img/company.png);
    width: 503px;
    height: 53px;
    position: absolute;
    top: 67px;
    left: -26px;
  }

  .activity_content {
    width: 100%;
    height: 433px;
    background: #ffffff;
    border: 3px solid #422106;
    border-radius: 12px;
    position: relative;
    z-index: 99;
    margin-left: -3px;
    margin-top: -3px;
  }

  .intro_text {
    width: 1089px;
    height: 82px;
    font-size: 18px;
    font-family: Source Han Sans SC, Source Han Sans SC-Normal;
    font-weight: normal;
    text-align: justifyLeft;
    color: #333333;
    line-height: 32px;
    letter-spacing: 0.09px;
    position: absolute;
    top: 149px;
    left: 50%;
    transform: translateX(-50%);
  }
  .tel1 {
    position: absolute;
    top: 301px;
    left: 55px;
  }
  .tel2 {
    position: absolute;
    top: 301px;
    left: 359px;
  }
  .email {
    position: absolute;
    left: 56px;
    top: 343px;
  }
  .add {
    position: absolute;
    left: 361px;
    top: 343px;
  }
  .sign_up {
    position: absolute;
    top: 256px;
    right: 50px;
  }
  .sign_up_text {
    text-align: center;
    margin-top: 9px;
  }
  .contact_text {
    font-size: 18px;
    font-family: Source Han Sans SC, Source Han Sans SC-Medium;
    font-weight: 500;
    text-align: justifyLeft;
    color: #333333;
    letter-spacing: 0.09px;
    margin-left: 5px;
  }
  .left_text {
    font-size: 30px;
    font-family: YouSheBiaoTiHei, YouSheBiaoTiHei-Regular;
    font-weight: 400;
    text-align: left;
    color: #422106;
  }

  .y_box_bottom {
    width: 503px;
    height: 67px;
    background: #fbc312;
    border: 3px solid #422106;
    border-radius: 4px 4px 16px 4px;
    position: absolute;
    right: -3px;
    bottom: -16px;
  }

  .part4 {
    width: 100%;
    height: 400px;
    margin-top: 110px;
    background: #0323c5;
  }

  .top4 {
    position: relative;
    left: 50%;
    top: -32px;
    transform: translate(-50%);
  }

  .part4__inner {
    max-width: 1200px;
    margin: 60px auto 0;
    display: flex;
    align-items: flex-start;
  }
  .part4__inner .item1 {
    margin-right: 58.84px;
  }
  .part4__inner .item2 {
    margin-right: 128.22px;
  }
  .part4__inner__name {
    margin-top: 33.88px;
    margin-left: 14px;
  }
  .part4__inner .item1,
  .item2 p {
    line-height: 29.05px;
    font-size: 18px;
    font-family: Source Han Sans SC, Source Han Sans SC-Medium;
    color: #ffffff;
  }
  .part4__inner .item3 {
    display: inline-flex;
    position: relative;
  }

  .qr_code1 {
    margin-right: 48.59px;
  }
  .live_box2 {
    padding-top: 40px;
    width: 1180px;
  }
  .part4__inner .item3 p {
    font-size: 12px;
    font-family: Source Han Sans SC, Source Han Sans SC-Medium;
    font-weight: 500;
    text-align: center;
    color: #92b7fc;
    line-height: 22px;
    letter-spacing: 0.06px;
    margin-top: 5px;
  }

  .item3 .qr_code {
    z-index: 99;
  }
  .line3 {
    position: absolute;
    z-index: 1;
    top: -55px;
    left: -40px;
  }

  /* 顶通条 */
  .site_top {
    position: relative;
    z-index: 30;
    height: 30px;
    background-color: #535353;
    color: #ffcece;
    line-height: 30px;
  }
  .site_top .wrap {
    width: 1220px;
    margin: 0 auto;
  }
  .site_top .icon {
    display: inline-block;
    margin-right: 5px;
    width: 16px;
    height: 16px;
    vertical-align: -2px;
    background: url("/static/main/img/site-top-icon.png") no-repeat;
    background-position: -19px 0;
  }
  .site_top .i2 {
    background-position: -19px -18px;
  }
  .site_top .i3 {
    background-position: -19px -36px;
  }
  .site_top .i4 {
    background-position: -19px -54px;
  }
  .site_top .i5 {
    background-position: -19px -71px;
  }
  .site_top .i6 {
    background-position: -19px -125px;
  }
  .site_top .i7 {
    background-position: -19px -91px;
  }
  .site_top .i8 {
    background-position: -19px -108px;
  }
  .site_top .site_partner a:hover .icon {
    background-position-x: -19px;
  }
  .site_top .origin-item {
    margin-right: 20px;
    float: right;
  }
  .site_top .origin-item .hot {
    position: relative;
    margin: -15px 0 0 10px;
    padding: 1px 2px;
    display: inline-block;
    line-height: 1;
    vertical-align: middle;
    border-radius: 3px;
    background-color: #d00000;
    color: #fff;
    font-size: 12px;
    font-style: italic;
    font-family: "PingFang SC", "Arial", "Microsoft YaHei", "Helvetica",
      "Helvetica Neue", "Tahoma", "sans-serif";
  }
  .site_top .origin-item .hot:before {
    position: absolute;
    left: -4px;
    top: 3px;
    content: "";
    width: 0;
    height: 0;
    line-height: 1;
    background-color: #d00000;
    border-style: solid;
    border-width: 4px 4px 4px 0;
    border-color: #535353 #d00000 #535353 #535353;
  }
  .site_top a {
    color: #fff;
  }
  .site_top a:hover {
    color: #fff;
  }
  .site_partner {
    position: relative;
    float: left;
  }
  .site_partner:after {
    position: absolute;
    top: 14.5px;
    left: 0;
    content: "";
    width: 100%;
    height: 1px;
    background-color: #fff;
  }
  .site_partner a {
    position: relative;
    z-index: 1;
    float: left;
    padding: 0 5px;
    background-color: #535353;
    margin-left: 20px;
    vertical-align: top;
  }
  .site_partner a:first-child {
    margin-left: 0;
  }
  .site_top .user_area {
    float: right;
  }
  .site_top .login {
    margin-right: 5px;
  }
  .site_top .user_area .umenu {
    position: relative;
    cursor: pointer;
  }
  .site_top .user_area .umenu img {
    display: inline-block;
    margin-left: 20px;
    vertical-align: -8px;
    width: 24px;
    height: 24px;
    border-radius: 24px;
  }
  .site_top .user_area .umenu:hover .drop {
    display: block;
  }
  .site_top .user_area .drop {
    display: none;
    position: absolute;
    right: 0;
    top: 22px;
    z-index: 10;
    width: 110px;
    text-align: center;
    background-color: #666;
    background-color: rgba(0, 0, 0, 0.6);
  }
  .site_top .user_area .drop:before {
    content: "";
    position: absolute;
    top: -20px;
    right: 0;
    width: 50px;
    height: 20px;
    /* background-color: red; */
  }
  .site_top .user_area .drop a {
    display: block;
    color: #fff;
  }
  .site_top .user_area .drop a:hover {
    background-color: #000;
  }

  .guests-card {
    position: relative;
  }
  .video-paly-btn,
  .guests-card-name,
  .guests-card-info {
    position: absolute;
    z-index: 10;
  }
  .video-paly-btn {
    cursor: pointer;
    width: 46px;
    height: 46px;
    right: 12px;
    top: 12px;
    background-size: 100%;
    background-image: url('../img/play_video.png');
  }
  .guests-card-name {
    font-family: 'YouSheBiaoTiHei';
    width: 143px;
    height: 48px;
    line-height: 46px;
    left: -10px;
    bottom: 55px;
    z-index: 11;
    font-size: 32px;
    font-weight: 400;
    color: #422106;
    text-align: center;
    background: url('../img/guests-bg-title.png') left top no-repeat;
    background-size: 100% 100%; 
  }
  .guests-card-info {
    box-sizing: border-box;
    width: 100%;
    height: 112px;
    left: 0;
    bottom: 0;
    padding: 30px 18px 0 18px;
    color: #422106;
    background: url('../img/introduce.png') left top no-repeat;
    background-size: 100% 100%; 
  }
  .guests-card-job {
    font-size: 18px;
    font-weight: 700;
  }
  .guests-card-company {
    font-size: 14px;
  }
  .live_box2 .swiper-button-next,.live_box2 .swiper-button-prev{
    display: none;
  }
  .live_box_m{
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .guests-card {
    width: 253px;
    text-align: center;
  }
  .live_box_m img{
    max-width: 100%;
    height: auto;
    display: block;
  }
  .live_box_m .guests-card{
    cursor: pointer;
  }
  .live_box_m .guests-card + .guests-card {
    margin-left: 20px;
  }
  .mt20{
    margin-top: 30px;
  }
}

@media screen and (max-width: 750px) {
  .site_top, .footer {
    display: none;
  }
  .m_guests{
    display: flex;
    align-items: center;
    justify-content: space-between;
    overflow: hidden;
  }
  .guests-card-m{
    position: relative;
    flex: 1;
  }
  .guests-card-m img{
    width: 1.1rem;
    height: 1.36rem;
  }
  .mt20{
    margin-top: 0.2rem;
  }
  .guests-card-m .video-btn{
    position: absolute;
    cursor: pointer;
    width: .16rem;
    height: .16rem;
    right: 0.1rem;
    top: .02rem;
    background-size: 100%;
    background-image: url('../img/play_video.png');
    z-index: 5;
}
}