@media screen and (max-width: 750px) {
  html {
    font-size: 50px;
  }
  .pc {
    display: none;
  }
  .phone {
    display: block;
  }
  .case-a:not(.pc) {
    display: inline-block;
  }
  /* index */
  .box {
    width: 86.666666%;
  }
  .nav-phone {
    padding: 0.4rem 0 0.24rem;
    transition: all 0.25s;
  }
  .phone-flex {
    display: flex;
    justify-content: space-between;
  }
  .phone-nav-span {
    color: #858585;
    font-size: 0.36rem;
    transition: all 0.25s;
    position: relative;
    padding: 0 0 0 2.08rem;
  }
  .phone-nav-span::before {
    content: "";
    width: 1.64rem;
    height: 1.12rem;
    position: absolute;
    left: 0;
    top: -40%;
    background: url(../images/logo.png) center / cover no-repeat;
  }
  .phone-nav-img {
    width: 1rem;
    height: 0.7rem;
  }
  .phone-banner {
    background: url(../images/phone_banner_01.jpg) center / cover no-repeat;
  }
  .phone-banner-h3 {
    padding: 6.56rem 0 0 2.24rem;
    font-size: 1.2rem;
    font-weight: bold;
    line-height: 1.92rem;
    color: #fff;
    white-space: nowrap;
  }
  .phone-banner-h3-span {
    font-weight: normal;
  }
  .phone-banner-p {
    padding: 2.36rem 0 0 2.24rem;
  }
  .phone-banner-span {
    font-size: 0.36rem;
    position: relative;
    color: #fff;
  }
  .phone-banner-span::before {
    content: "";
    position: absolute;
    height: 1.44rem;
    width: 1px;
    background-color: #fff;
    left: 0.68rem;
    bottom: 1rem;
  }
  .phone-banner-article.active {
    padding-top: 7rem;
  }
  .phone-banner-article {
    font-size: 0.36rem;
    color: #888;
    letter-spacing: 0.32rem;
    padding-left: 2.24rem;
  }
  .phone-banner-article:last-child {
    padding-bottom: 2.6rem;
  }
  .ind-contact {
    padding: 1.6rem 0 1.8rem;
  }
  .indc-h6 {
    font-size: 0.44rem;
  }
  .indc-h3 {
    margin: 0.4rem 0 1.9rem;
    font-size: 0.56rem;
    color: #fff;
  }
  .indc-h3-server {
    margin-right: 1.24rem;
  }
  .indc-h3-server::after {
    width: 0.9rem;
    height: 2px;
    top: 50%;
    right: -1.08rem;
    background: #fff;
  }
  .indc-icon-wrap-top {
    padding: 0 0 1.2rem;
    display: flex;
    justify-content: center;
  }
  .indc-icon-wrap-bottom {
    display: flex;
    justify-content: space-around;
  }
  .indc-icon-single.indc-icon-single {
    width: 2.2rem;
    margin: 0 0.2rem;
    padding: 0;
    border: none;
  }
  .indc-para {
    font-size: 0.4626rem;
    width: 100%;
    margin: 0.6rem 0 0.3rem;
  }
  .indc-num {
    font-size: 0.4626rem;
  }
  .casewrap {
    background: #fff;
  }
  .ind-cases {
    padding: 0;
    background: #fff;
  }
  .case {
    padding-top: 0;
  }
  .ind-case-phone-nav {
    display: flex;
    justify-content: space-between;
    margin: 1.2rem 0 0.96rem;
  }
  .ind-case-phone-span {
    color: #919191;
    font-size: 0.56rem;
    letter-spacing: 2px;
    line-height: 0.52rem;
    font-weight: bold;
  }
  .ind-case-hb-wrap {
    width: 0.8rem;
    height: 0.56rem;
  }
  .ind-case-hb {
    width: 100%;
    vertical-align: top;
  }
  .box.select {
    width: 100%;
  }
  .ind-brand-single {
    width: 100%;
    margin: 0 0 0.52rem;
  }
  .ind-brand-single:last-child {
    margin: 0;
  }
  .ind-brand-hover-wrap {
    position: absolute;
    color: #fff;
    text-align: center;
    left: 0;
    right: 0;
    top: 0;
  }
  .ind-brand-hover-title {
    font-size: 0.92rem;
    margin: 3.2rem 0 1.32rem;
  }
  .ind-brand-hover-desc {
    margin: 0.52rem auto 0;
    padding: 0.36rem 0 0.6rem;
  }
  .ind-brand-desc-title {
    font-size: 0.8rem;
    margin-bottom: 0.2rem;
  }
  .ind-brand-desc-title::before {
    width: 90%;
  }
  .ind-brand-desc-title::after {
    width: 90%;
  }
  .ind-brand-desc-bottom {
    font-size: 0.48rem;
  }
  .ind-design-phone {
    background: #303030;
  }
  .ind-design-phone-title {
    font-size: 0.4rem;
    text-align: center;
    color: #fff;
    padding: 1.28rem 0 0;
    position: relative;
  }
  .ind-design-phone-title::before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translate(-50%);
    bottom: -0.64rem;
    width: 4.5rem;
    height: 0.1rem;
    background: #535353;
  }
  .ind-design-phone-title::after {
    content: "";
    position: absolute;
    bottom: -0.64rem;
    height: 1px;
    left: 0;
    background: #535353;
  }
  .swiper-phone-banner {
    text-align: center;
  }
  .ind-design-single {
    width: 8.88rem;
    height: 17.6rem;
    margin: 0 auto;
    padding: 1.2rem 0 0;
  }
  .ind-des-phone-img1 {
    width: 2.1rem;
    height: 2.1rem;
  }
  .ind-des-phone-img2 {
    width: 1.84rem;
    height: 2.6rem;
  }
  .ind-des-phone-img3 {
    width: 1.36rem;
    height: 2.36rem;
  }
  .ind-des-phone-img4 {
    width: 1.64rem;
    height: 1.64rem;
  }
  .border-wrap {
    margin: 1.08rem 0 0;
    height: auto;
  }
  .ind-design-title {
    font-size: 0.6rem;
    padding: 0 0.64rem;
  }
  .ind-design-top .ind-design-li:first-child {
    padding: 0.64rem 0 0;
  }
  .ind-design-top .ind-design-li:last-child {
    padding: 0 0 0.56rem;
  }
  .ind-design-li {
    font-size: 0.5542rem;
    line-height: 1.0342rem;
    margin: 0 0 0 -0.24rem;
  }
  .ind-design-bottom {
    padding-top: 0.64rem;
  }
  .ind-design-bottom.ind-design-bottom-one {
    padding: 0 0 1.2rem;
  }
  .ind-design-bottom.ind-design-bottom-two {
    padding: 0 0 2.8rem;
  }
  .ind-design-bottom.ind-design-bottom-three {
    padding: 0 0 3rem;
  }
  .border-wrap-top {
    margin: 1.4rem 0 0;
    height: auto;
  }
  .border-wrap-bottom {
    margin: 1.6rem 0 0;
    height: auto;
  }
  .ind-design-phone-desc {
    font-size: 0.36rem;
    color: #858585;
    text-align: center;
  }
  /* ind-news */
  .ind-news {
    width: 100%;
    padding: 1.2rem 0 0;
    background: #fff;
  }
  .ind-new-nav-span {
    font-size: 0.44rem;
    color: #919191;
  }
  .ind-news-para {
    font-size: 0.4rem;
    line-height: 0.76rem;
    padding: 0 0 1rem;
    color: #adadad;
  }
  .ind-news-tip {
    padding: 0.84rem 0 0;
    background: #f8f8f8;
  }
  .ind-news-h3 {
    font-size: 0.6314rem;
    padding: 0 0 0.64rem;
    width: 100%;
  }
  .ind-news-time {
    font-size: 0.4736rem;
    padding: 0;
  }
  .ind-news-desc {
    line-height: 0.8rem;
    font-size: 0.4736rem;
    padding: 0.68rem 0 0.76rem;
  }
  .ind-news-img {
    width: 100%;
  }
  .ind-news-img-single {
    width: 100%;
  }
  .index-news-more {
    font-size: 0.4736rem;
  }
  .ind-profile-img {
    width: 100%;
  }
  .swiper-container-create-phone,
  .swiper-container-phone-news,
  .swiper-container-phone {
    padding: 0 0 2.4rem;
  }
  .swiper-pagination-create-phone.swiper-pagination-bullets,
  .swiper-pagination-phone.swiper-pagination-bullets,
  .swiper-pagination-phone-news.swiper-pagination-bullets {
    text-align: center;
    position: absolute;
    bottom: 1.16rem;
  }
  .swiper-pagination-index.swiper-pagination-bullets {
    position: absolute;
    bottom: 3.6%;
    left: 16.7%;
  }
  .swiper-pagination-phone-news .swiper-pagination-bullet {
    box-sizing: border-box;
    height: 0.3rem;
    width: 0.3rem;
    border: 1px solid #333;
    border-radius: 50%;
    background: #fff;
  }
  .swiper-pagination-phone-news .swiper-pagination-bullet-active {
    background-color: #333;
  }
  .swiper-pagination-phone .swiper-pagination-bullet {
    box-sizing: border-box;
    height: 0.3rem;
    width: 0.3rem;
    border: 1px solid #fff;
    border-radius: 50%;
    background: #303030;
  }
  .swiper-pagination-phone .swiper-pagination-bullet-active {
    background-color: #fff;
  }
  .swiper-pagination-index .swiper-pagination-bullet {
    height: 1px;
    width: 100px;
    background: #a51f24;
  }
  .swiper-pagination-index .swiper-pagination-bullet-active {
    background-color: #818180;
  }
  .swiper-pagination-create-phone .swiper-pagination-bullet {
    box-sizing: border-box;
    height: 0.3rem;
    width: 0.3rem;
    border: 1px solid #fff;
    border-radius: 50%;
    background: #111;
  }
  .swiper-pagination-create-phone .swiper-pagination-bullet-active {
    background-color: #a51f24;
    border-color: #a51f24;
  }
  .footer-phone {
    padding: 0.5rem 0 2.4%;
    background: #3b3b3b;
    color: #858585;
    position: relative;
    z-index: 2;
  }
  .xiangqing_btn {
    bottom: 3.32rem;
    right: 0.4rem;
  }
  .footer-line {
    font-size: 0.48rem;
    border-top: 1px solid #626262;
    border-bottom: 1px solid #626262;
    padding: 0.8rem 0 1.08rem 1.56rem;
  }
  .footer-phone-contact {
    padding: 0 0 0.32rem;
  }
  .footer-phone-address {
    color: #fff;
    line-height: 0.8rem;
  }
  .footer-phone-bottom {
    display: flex;
  }
  .footer-phone-left {
    margin: 0 1.2rem 0 0;
  }
  .footer-phone-desc {
    margin: 0.24rem 0 0.44rem;
  }
  .footer-phone-callme {
    color: #fff;
  }
  .footer-phone-copyright {
    margin: 0.76rem 0 0.96rem;
    text-align: center;
    font-size: 0.32rem;
  }
  /* case.html */
  .case-cases {
    padding: 1.6rem 0 3.4rem;
  }
  .case-title {
    margin: 0 0 0.84rem;
    font-size: 0.36rem;
  }
  .case-location {
    font-size: 0.28rem;
    margin: 0 0.16rem 0.32rem;
  }
  .other-banner {
    margin: 1.6rem 0 0;
  }
  .about-team {
    background: #f3f3f3;
    padding: 0.6rem 0 2.8rem;
  }
  .about-box {
    width: 86.666666%;
  }
  .about-teams {
    flex-direction: column;
    margin: 0;
    text-align: center;
  }
  .about-team-single + div {
    margin: 1.16rem 0 0;
  }
  .about-team-title {
    font-size: 0.64rem;
  }
  .about-team-title::before {
    width: 0.46rem;
    bottom: -0.32rem;
    left: 0.48rem;
    height: 3px;
  }
  .about-team-title::after {
    width: 1rem;
    bottom: -0.32rem;
    left: 0.98rem;
  }
  .about-team-desc {
    margin: 0.84rem 0 0.8rem;
    font-size: 0.44rem;
    line-height: 0.8rem;
    color: #393939;
  }
  .about-team-desc.active {
    padding-top: 0;
  }
  .about-team-img {
    width: 100%;
  }
  .about-profession {
    padding: 0 0 3.24rem;
  }
  .about-profession-title {
    margin: 0.6rem 0;
    font-size: 0.64rem;
  }
  .about-profession-desc {
    font-size: 0.42rem;
    line-height: 0.72rem;
  }
  .about-vedio {
    position: relative;
    height: 5.2rem;
  }
  .about-vedio-wrap,
  .about-vedio-play {
    margin-top: -2.4rem;
  }
  .dynamic-banner {
    padding: 1.6rem 0 0;
    background: #111;
  }
  .dynamic-banner-wrap {
    top: 5.12rem;
    margin-left: 48%;
  }
  .dynamic-title {
    font-size: 0.8rem;
    margin-bottom: 0.72rem;
  }
  .dynamic-desc {
    font-size: 0.2934rem;
    line-height: 0.52rem;
  }
  .dynamic-update {
    padding: 0.8rem 0 1.6rem;
    text-align: center;
  }
  .dynamic-box {
    width: 86.6666%;
    display: block;
  }
  .dynamic-update-phone-title {
    position: relative;
    font-size: 0.64rem;
    color: #c72424;
    margin-bottom: 0.8rem;
    width: fit-content;
    margin: 0 auto;
  }
  .dynamic-update-phone-title:before {
    content: '';
    position: absolute;
    width: 0.46rem;
    height: 3px;
    background: #1a7dd1;
    bottom: -0.32rem;
    left: 0.48rem;
  }
  .dynamic-update-phone-title:after {
    content: '';
    position: absolute;
    width: 0.98rem;
    height: 2px;
    background: #111;
    bottom: -0.32rem;
    left: 0.98rem;
  }
  .dynamic-update-desc {
    font-size: 0.42rem;
    line-height: 0.84rem;
    text-align: center;
    margin-top: 0.8rem;
    color: #404040;
    padding: 0;
  }
  .dynamic-create-phone {
    padding: 1.52rem 0 0;
    vertical-align: bottom;
    background: url(../images/dynamic04-phone.jpg) center no-repeat;
  }
  .dynamic-create-title-phone::before {
    content: "ORIGINALBYTIANYI";
    position: absolute;
    top: -0.44rem;
    color: #fff;
    font-size: 0.28rem;
    left: 0;
    right: 0;
    margin: auto;
  }
  .dynamic-create-title-phone {
    color: #fff;
    font-size: 0.64rem;
    margin: 0 0 1.2rem;
    text-align: center;
    position: relative;
    transition: all 0.25s;
  }
  .dynimac-swiper-box {
    padding: 1.04rem 0 0 0.32rem;
    background: #111;
  }
  .dynimac-news-h3 {
    font-size: 0.64rem;
    color: #d81a1e;
  }
  .dynimac-news-time {
    font-size: 0.4736rem;
    color: #595959;
    margin: 0.52rem 0 0.52rem;
  }
  .dynimac-news-desc {
    font-size: 0.52rem;
    color: #d4d4d4;
    line-height: 0.76rem;
    padding: 0 0 1.4rem;
    width: 17em;
  }
  .contact-cooperative {
    padding: 1.1rem 0 0;
  }
  .contact-cooperative-title {
    font-size: 0.56rem;
  }
  .contact-cooperative-title::before {
    top: -0.48rem;
    font-size: 0.44rem;
  }
  .contact-cooperative-streams {
    width: 100%;
    font-size: 0.32rem;
    letter-spacing: 1px;
    height: 2.08rem;
    padding: 0 0 1.4rem;
    margin: 0.8rem 0 0;
  }
  .flowimg {
    width: 2.6rem;
  }
  .flow1 {
    left: 0.44rem;
  }
  .flow2 {
    left: 2.4rem;
  }
  .flow3 {
    left: 4.28rem;
  }
  .flow4 {
    left: 6.2rem;
  }
  .flow5 {
    left: 8.08rem;
  }
  .flow6 {
    left: 9.96rem;
  }
  .flow7 {
    left: 11.84rem;
  }
  .flowtitle1 {
    margin: 0.76rem 0 0 0.2rem;
    color: #111;
  }
  .flowtitle:not(.flowtitle1) {
    margin: 0.52rem 0 0 0.8rem;
  }
  .contact-cooperative-code-desc {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.12rem 0 1.2rem;
  }
  .contact-cooperative-code {
    margin-right: 0;
    width: 3.68rem;
    height: 3.68rem;
    margin: 0 auto;
  }
  .contact-cooperative-code img {
    width: 100%;
  }
  .contact-cooperative-desc {
    font-size: 0.36rem;
    display: flex;
    flex-direction: row;
    justify-content: center;
    margin: 1.2rem 0;
  }
  .contact-cooperative-design {
    padding-left: 1.04rem;
    margin: 0 2rem 0 0;
  }
  .contact-cooperative-design::before {
    width: 0.72rem;
    height: 0.52rem;
    top: -3%;
    background: url(../images/contact-ty-phone.png) center / cover no-repeat;
  }
  .contact-cooperative-wechat {
    padding-left: 0.88rem;
    margin-top: 0;
  }
  .contact-cooperative-wechat::before {
    width: 0.6rem;
    height: 0.52rem;
    top: 0;
    background: url(../images/contact-wechat-phone.png) center / cover no-repeat;
  }
  .contact-company {
    padding: 3.6rem 0 6.4rem;
    background: url(../images/contact-search-banner-phone.jpg) center / cover no-repeat;
  }
  .contact-company-title {
    font-size: 0.64rem;
  }
  .contact-company-desc {
    margin: 0.8rem 0 0.52rem;
    font-size: 0.44rem;
  }
  .contact-company-address {
    font-size: 0.4rem;
  }
  .contact-company-phone {
    font-size: 0.4rem;
    margin: 0.36rem 0 0.4rem;
  }
  .contact-company-location {
    font-size: 0.4rem;
    margin: 0 0 1.08rem;
  }
  .contact-company-search {
    display: flex;
  }
  .contact-company-search-input {
    width: 6.56rem;
    height: 0.72rem;
    padding: 0 0.56rem 0 0.36rem;
  }
  .contact-company-search-up {
    margin: 0.18rem 0 0 2.8rem;
    border-left: 0.02rem solid #d2d2d2;
    padding: 0 0 0.06rem 0.16rem;
    width: 0.26rem;
    height: 0.34rem;
    object-fit: cover;
  }
  .contact-company-search-right {
    width: 1.14rem;
    height: 0.72rem;
    border-radius: 0 0.08rem 0.08rem 0;
  }
  .contact-company-search-right img {
    width: 0.4rem;
    height: 0.4rem;
    object-fit: cover;
  }
  .contact-together {
    padding: 2.2rem 0 1.04rem;
  }
  .contact-together-box {
    width: 86.6666%;
  }
  .contact-together-title {
    font-size: 0.48rem;
    color: #111111;
    width: fit-content;
    margin: 0 auto;
    position: relative;
  }
  .contact-together-title::before {
    content: 'CONSULTATION';
    top: -2em;
    font-size: 0.44rem;
    text-align: center;
    width: 100%;
    color: #989898;
    transform: scale(1) translate(0);
  }
  .contact-together-title::after {
    width: 0;
  }
  .contact-together-mens {
    flex-direction: column;
    padding: 1.8rem 0 0;
  }
  .contact-together-men {
    margin: 0 0 1.04rem;
  }
  .contact-together-menimg,
  .contact-together-imgzilong {
    height: 6.52rem;
    object-fit: cover;
  }
  .contact-together-menimg {
    width: 5.1rem;
  }
  .contact-together-imgzilong {
    width: 5.54rem;
  }
  .contact-together-phone-wrap {
    margin-top: -5.4rem;
    margin-left: 7rem;
  }
  .contact-together-men.active {
    text-align: right;
  }
  .contact-together-zilong-wrap {
    margin-top: -4.4rem;
    margin-left: 0.68rem;
    text-align: left;
  }
  .contact-together-people {
    margin: 0 0 0.44rem;
    color: #111;
    font-size: 0.48rem;
    white-space: nowrap;
  }
  .contact-together-phone,
  .contact-together-wechate {
    font-size: 0.4rem;
    color: #3b3b3b;
    line-height: 0.76rem;
    white-space: nowrap;
  }
  .box-1150 {
    width: 86.6666%;
    display: block;
  }
  .contact-free {
    background: #000;
    padding: 3.04rem 0 3.2rem;
  }
  .contact-free-title {
    font-size: 0.64rem;
    padding: 0;
    text-align: center;
  }
  .contact-free-title::before {
    content: 'RGEQWRHUGAYSGD';
    top: -0.48rem;
    font-size: 0.4rem;
    left: 50%;
    transform: translate(-50%);
  }
  .contact-free-single {
    padding-left: 0.68rem;
    margin-top: 1rem;
    border-left: none;
  }
  .contact-free-single-title {
    font-size: 0.64rem;
    letter-spacing: 0.08rem;
  }
  .contact-free-single-ul {
    margin-top: 0.6rem;
  }
  .contact-free-single-li {
    font-size: 0.48rem;
    line-height: 0.88rem;
  }
  .close-phone {
    text-align: right;
  }
  .mask-close-img {
    width: 0.92rem;
    height: 0.92rem;
    object-fit: cover;
    display: inline-block;
    margin: 0.84rem 0;
  }
  .ul-mask {
    height: 100%;
    border-top: 2px solid #757575;
    display: block;
    text-align: center;
  }
  .mask-li:first-child {
    margin: 3rem 0 0;
  }
  .mask-li + li {
    margin: 2.6rem 0 0;
  }
  .mask-li-a {
    font-size: 0.76rem;
    padding: 20px;
    letter-spacing: 0.28rem;
  }
  #map2 {
    margin-top: 1.32rem;
    height: 12.8rem;
  }
  .ind-cases-li-a:not(.pc) {
    display: inline-block;
  }
  .ind-cases-li-a {
    padding: 0.32rem;
  }
  #case-phone {
    padding-top: 3rem;
  }
  .article {
    margin-top: 1.6rem;
    margin-bottom: 2rem;
  }
  .article-title {
    font-size: 0.64rem;
    line-height: 0.64rem;
  }
  .artitlce-time {
    margin-top: 0.4rem;
    padding-bottom: 0.2rem;
  }
  .article-para {
    margin-top: 0.4rem;
    font-size: 0.28rem;
    line-height: 0.52rem;
  }
  .article-para-title {
    margin-bottom: 0.2rem;
  }
  .article-next-prev {
    margin-top: 0.4rem;
  }
}
@media screen and (max-width: 720px) {
  html {
    font-size: 48px;
  }
}
@media screen and (max-width: 540px) {
  html {
    font-size: 36px;
  }
  .contact-cooperative-streams {
    font-size: 0.24rem;
  }
}
@media screen and (max-width: 480px) {
  html {
    font-size: 32px;
  }
}
@media screen and (max-width: 424px) {
  html {
    font-size: 28.26666667px;
  }
}
@media screen and (max-width: 414px) {
  html {
    font-size: 27.6px;
  }
}
@media screen and (max-width: 400px) {
  html {
    font-size: 26.66666667px;
  }
}
@media screen and (max-width: 384px) {
  html {
    font-size: 25.6px;
  }
}
@media screen and (max-width: 375px) {
  html {
    font-size: 25px;
  }
}
@media screen and (max-width: 360px) {
  html {
    font-size: 24px;
  }
}
@media screen and (max-width: 320px) {
  html {
    font-size: 21.33333333px;
  }
}