@media screen and (max-width: 1700px) {
  .w1650 {
    width: 85.9375%;
  }
}
@media screen and (max-width: 1080px) {
  footer .footer-row .l-box button {
    width: 9.5rem;
  }
}
@media screen and (max-width: 991px) {
  header .r-box .first-nav,
  .pcIndex {
    display: none !important;
  }
  header .r-box .caidan,
  .navIndex {
    display: block;
  }
  header {
    height: 64px;
  }
  header .logo {
    width: 200px;
  }
  header .r-box .searchBtn {
    margin: 0;
    margin-right: 1.5625rem;
  }
  .h {
    height: 64px;
  }
  .bread-page {
    padding-top: 1.0937rem;
  }
  .index {
    height: auto;
  }
  .index .i-banner .swiper-slide {
    height: 28.125rem;
  }
  .index .i-banner .swiper-slide .text1 {
    padding-top: 10%;
  }
  .index .i-banner .swiper-slide .text1 img {
    width: 14rem;
  }
  .index .i-banner .swiper-slide .text1 h6 {
    font-size: 2rem;
    margin-top: 1.4rem;
  }
  .index .i-banner .swiper-slide .text1 p {
    font-size: 1.125rem;
  }
  .index .i-banner .ipageBox {
    left: 7%;
  }
  .index .i-banner .ipageBox .swiper-pagination {
    width: 14rem;
  }
  .index .i-about {
    height: auto;
  }
  .index .i-about .bg {
    width: 12.5rem;
  }
  .index .i-about .w1650 {
    padding-left: 0;
  }
  .index .i-about .w1650 .top .i-about-title {
    font-size: 2.5rem;
  }
  .index .i-about .w1650 .top .i-about-title img {
    width: 12rem;
    margin: 0.4rem 1.25rem 0 0.8125rem;
  }
  .index .i-about .w1650 .top .i-about-title .wenhao {
    font-size: 3rem;
  }
  .index .i-about .w1650 .bottom {
    flex-wrap: wrap;
    margin: 2rem 0;
  }
  .index .i-about .w1650 .bottom .item {
    width: 50%;
  }
  .index .i-product .box {
    width: 60%;
  }
  .index .i-product .box .i-product-title2 {
    margin: 1.09rem 0 1.09rem;
  }
  .index .i-product .box .i-product-title3 {
    font-size: 2.5rem;
  }
  .index .i-product .box .i-product-list {
    margin-top: 3rem;
  }
  .index .i-news {
    padding-top: 2.5rem;
    padding-bottom: 2.812rem;
  }
  .index .i-news .top .i-news-title {
    font-size: 1.84375rem;
  }
  .about .about-item1 {
    padding-bottom: 2.31rem;
  }
  .about .about-item1 .about-item1-box {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(4, 1fr);
    grid-column-gap: 10px;
    grid-row-gap: 2.125rem;
  }
  .about .about-item1 .item1 {
    grid-area: 1 / 1 / 2 / 4;
  }
  .about .about-item2 {
    background-position: cover;
    background-size: 100% 50%;
  }
  .about .about-item2 .about-item2-box {
    width: 100%;
  }
  .about .about-item3 {
    padding: 2.31rem 0 5rem;
  }
  .about .about-item3 .aboutItem3Swiper {
    margin-top: 3.437rem;
    width: 85%;
  }
  .about .about-item3 .aboutItem3Swiper .swiper-button-prev {
    left: 10px;
  }
  .about .about-item3 .aboutItem3Swiper .swiper-button-next {
    right: 10px;
  }
  .about .about-item4 {
    padding: 3rem 0;
    flex-wrap: wrap;
    position: relative;
  }
  .about .about-item4 .l-box {
    width: 100%;
    padding-left: 0;
    margin-bottom: 2.5rem;
  }
  .about .about-item4 .l-box .publicTitle {
    display: flex;
    justify-content: center;
  }
  .about .about-item4 .l-box .swiperBtn {
    margin-top: 0;
    padding-left: 0;
  }
  .about .about-item4 .l-box .swiperBtn .swiper-prev {
    margin-right: 0;
    position: absolute;
    top: 350%;
    left: 1%;
  }
  .about .about-item4 .l-box .swiperBtn .swiper-next {
    position: absolute;
    top: 350%;
    right: 1%;
  }
  .about .about-item4 .r-box {
    width: 85%;
    margin: 0 auto;
  }
  .products .productsList {
    margin-top: 2.812rem;
  }
  .products .productsList > li a {
    flex-direction: column-reverse !important;
  }
  .products .productsList > li a .l-box {
    width: 85%;
    margin: 0 auto;
    padding-bottom: 2rem;
    padding-left: 0;
  }
  .products .productsList > li a .l-box .i-product-title2 {
    margin: 1.0937rem 0;
  }
  .products .productsList > li a .l-box .i-product-con {
    margin-bottom: 1.716rem;
  }
  .products .productsList > li a .r-box {
    margin: 2rem auto;
  }
  .products .productsList > li:nth-child(even) a .l-box {
    padding-right: 0;
  }
  .products .productDetail .productDetail-item1 .item1-box {
    margin-top: 1.713rem;
    flex-direction: column-reverse;
  }
  .products .productDetail .productDetail-item1 .item1-box .l-box {
    padding-left: 0;
    width: 85%;
    margin: 2rem auto;
  }
  .products .productDetail .productDetail-item1 .item1-box .l-box .i-product-title2 {
    margin: 1.0931rem 0;
  }
  .products .productDetail .productDetail-item1 .item1-box .l-box .i-product-con {
    margin-bottom: 1.718rem;
  }
  .products .productDetail .productDetail-item1 .item1-box .r-box {
    margin: 0 auto;
  }
  .products .productDetail .productDetail-item2 {
    padding: 3.7rem 0 5rem;
  }
  .products .productDetail .productDetail-item3 {
    padding: 3.6875rem 0;
  }
  .products .productDetail .productDetail-item3 .con {
    margin-top: 2.812rem;
  }
  .products .productDetail .productDetail-item3 .con table tr td {
    padding-left: 0;
    text-align: center;
  }
  .products .productDetail .productDetail-item3 .con table tr td:first-child {
    padding-left: 0;
    text-align: center;
  }
  .news .newsList {
    margin-top: 3.2812rem;
    justify-content: space-between;
  }
  .news .newsList li {
    width: 48%;
  }
  .news .newsList li:not(:nth-child(3n)) {
    margin-right: 0;
  }
  .news .news-detail {
    flex-wrap: wrap;
    padding-bottom: 3.432rem;
  }
  .news .news-detail .l-box {
    width: 100%;
    padding: 3rem;
  }
  .news .news-detail .r-box {
    width: 100%;
  }
  .news .news-detail .r-box .newsList {
    margin-top: 1.6406rem;
  }
  .learningCenter .learn2 .title {
    padding-left: 3.4375rem;
  }
  .learningCenter .learn2 .title img {
    transform: translateY(-50%);
  }
  .learningCenter .qaList {
    margin-top: 3.434rem;
  }
  .learningCenter .qaList li {
    width: 100%;
    margin-bottom: 2.75rem;
  }
  .learningCenter .weldTitle {
    margin-top: 1.875rem;
  }
  .learningCenter .weldBox .weldBoxItem li .tableBox {
    overflow: scroll;
  }
  .learningCenter .weldBox .weldBoxItem li .tableBox table {
    width: 1200px;
  }
  .learningCenter .weldBox .weldBoxItem li .box {
    flex-direction: column;
  }
  .learningCenter .weldBox .weldBoxItem li .box .l-box {
    margin: 10px auto;
  }
  .learningCenter .weldBox .weldBoxItem li .box .r-box {
    width: 100%;
  }
  .learningCenter .qaList li {
    height: auto;
    min-height: 14.375rem;
    padding: 1.875rem;
  }
  .banner .title {
    font-size: 3.0625rem;
  }
  .video .publicTitle {
    margin-top: 2.3437rem;
  }
  .video .videoList {
    justify-content: space-between;
  }
  .video .videoList li {
    width: 49%;
  }
  .video .videoList li:not(:nth-child(3n)) {
    margin-right: 0;
  }
  .video .videoBox .videoContent {
    width: 65%;
  }
  .contactUs #container {
    height: 20rem;
  }
}
@media screen and (max-width: 768px) {
  .index .i-news .newsList {
    margin-top: 2.8rem;
  }
  .about .about-item4 .swiperBtn .swiper-next,
  .about .about-item4 .swiperBtn .swiper-prev {
    width: 2.8125rem;
  }
  .about .about-item4 .swiperBtn .swiper-next img,
  .about .about-item4 .swiperBtn .swiper-prev img {
    display: block;
    width: 100%;
  }
  .banner .title {
    font-size: 5rem;
  }
  .banner .icon-box .line {
    width: 140px;
  }
  .service .input-row {
    flex-wrap: wrap;
  }
  .service .input-row .input-item {
    width: 100%;
  }
  .service .input-row .input-item:not(:last-child) {
    margin-bottom: 1.875rem;
  }
}
@media screen and (max-width: 640px) {
  .index .i-news .newsList {
    flex-wrap: wrap;
  }
  .index .i-news .newsList li {
    width: 100%;
  }
  .index .i-news .newsList li:not(:last-child) {
    margin-bottom: 30px;
  }
  .learningCenter .weldBox .weldBoxItem li .l-box {
    width: 100%;
  }
  .learningCenter .banner .title {
    font-size: 2.5rem;
  }
  .video .banner .title {
    font-size: 2.5rem;
  }
  .video .videoList li {
    width: 100%;
  }
  .video .videoBox .videoContent {
    width: 75%;
    height: 25%;
  }
}
@media screen and (max-width: 500px) {
  header .logo {
    width: 120px;
  }
  .news .newsList li {
    width: 100%;
  }
}