body {
  background: #fff;
  position: relative;
}

section .section-title {
  font-weight: 700;
  text-align: center;
  color: #1f1e1e;
}
section .section-text {
  font-weight: lighter;
  text-align: center;
  font-size: 18px;
  line-height: 28px;
  margin-top: 8px;
}

.case-first {
  background: url(../images/case/first_bg.jpg) no-repeat;
  background-size: cover;
  margin-bottom: 46px;
}
.case-first .page-nav {
  padding-top: 35px;
  padding-bottom: 32px;
  color: #f2f7fb;
  font-size: 20px;
}
.case-first .page-nav a {
  color: #f2f7fb;
  font-size: 20px;
  line-height: 36px;
}
.case-first .page-nav a:last-child {
  cursor: text;
}
.case-first .page-nav a:last-child span {
  color: #f9bb0b;
  border-bottom: solid 1px #f9bb0b;
  padding-bottom: 3px;
}
.case-first .page-nav a:last-child:hover {
  font-weight: normal;
}
.case-first .page-nav a:hover {
  font-weight: 700;
}
.case-first .first-content {
  display: flex;
  justify-content: space-between;
  padding: 0;
  background: rgba(255, 255, 255, 0.95);
}
.case-first .first-content .first-content-left .img-box {
  position: relative;
  overflow: hidden;
}
.case-first .first-content .first-content-left .img-box .case-img {
  width: 100%;
  height: auto;
  display: block;
  transition: 0.5s;
}
.case-first .first-content .first-content-left .img-box .case-img:hover {
  transform: scale(1.01);
}
.case-first .first-content .first-content-left .img-box .bottom-btn {
  position: absolute;
  left: 0;
  z-index: 1;
  width: 100%;
  display: flex;
  justify-content: space-evenly;
}
.case-first .first-content .first-content-left .img-box .bottom-btn a {
  display: block;
  color: #fff;
  text-align: center;
  font-weight: lighter;
  background: rgba(0, 0, 0, 0.66);
}
.case-first .first-content .first-content-left .img-box .bottom-btn .active {
  background: rgba(249, 187, 11, 0.95);
}
.case-first .first-content .first-content-left .img-box .bottom-btn .left-btn {
  display: flex;
  align-items: center;
  justify-content: center;
}
.case-first .first-content .first-content-left .img-box .bottom-btn .left-btn img {
  margin-right: 4px;
  width: 35px;
}
.case-first .first-content .first-content-right .case-title {
  font-weight: 700;
  color: #232323;
}
.case-first .first-content .first-content-right .case-data, .case-first .first-content .first-content-right .case-desc, .case-first .first-content .first-content-right .tel-link {
  color: #1f1f1f;
}
.case-first .first-content .first-content-right .case-desc {
  background: #fff;
  border: dashed 1px #dcdcdc;
}
.case-first .first-content .first-content-right .tel-link {
  display: flex;
  align-items: center;
}
.case-first .first-content .first-content-right .tel-link b {
  font-family: Impact;
  font-weight: normal;
  font-style: italic;
  line-height: 40px;
  color: #ffcb31;
  text-shadow: 1px 2px 0px rgba(36, 29, 10, 0.15);
}

.article-nav {
  background: #3f51b5;
  padding: 0;
}
.article-nav .nav {
  height: 100%;
}
.article-nav .nav .nav-item {
  width: 33.333333%;
  height: 100%;
}
.article-nav .nav .nav-item .nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  cursor: pointer;
}
.article-nav .nav .nav-item .nav-link p {
  border-right: solid 1px rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.9);
  width: 100%;
  font-weight: lighter;
  text-align: center;
}
.article-nav .nav .nav-item .nav-link img {
  display: none;
}
.article-nav .nav .nav-item .active {
  background: #ffcb31;
}
.article-nav .nav .nav-item .active p {
  font-weight: 700;
  text-shadow: 1px 1px 1px rgba(15, 33, 155, 0.35);
}
.article-nav .nav .nav-item .active img {
  display: block;
  margin-top: 10px;
}

.case-advantage {
  padding-top: 75px !important;
  padding-bottom: 80px !important;
}
.case-advantage .advantage-list {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
}
.case-advantage .advantage-list .advantage-item {
  display: flex;
  justify-content: space-between;
  position: relative;
}
.case-advantage .advantage-list .advantage-item .text-box h2 {
  color: #201f1f;
  font-weight: 700;
}
.case-advantage .advantage-list .advantage-item .text-box p {
  color: #444343;
  line-height: 28px;
  margin-top: 5px;
}
.case-advantage .advantage-list .advantage-item .icon-box {
  background: url(../images/product/adv_bg1.png) no-repeat;
  background-size: 100% 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.case-advantage .advantage-list .advantage-item .icon-box .icon-2 {
  display: none;
}
.case-advantage .advantage-list .advantage-item .bottom-line {
  position: absolute;
  bottom: 0;
  right: -3px;
  transform: scaleX(-1);
}
.case-advantage .advantage-list .advantage-item:hover .icon-box {
  background: url(../images/product/adv_bg2.png) no-repeat;
  background-size: 100% 100%;
}
.case-advantage .advantage-list .advantage-item:hover .icon-box .icon-2 {
  display: block;
}
.case-advantage .advantage-list .advantage-item:hover .icon-box .icon-1 {
  display: none;
}
.case-advantage .advantage-list .vr-line {
  position: absolute;
  height: 100%;
  width: 1px;
  border-left: dashed 1px #c4cbf3;
  left: 50%;
}

.product-section {
  background: #f4f4f4;
  padding: 45px 0;
}
.product-section .section-title {
  color: #1f1e1e;
}
.product-section .section-text {
  color: #010101;
  margin-top: 5px;
}
.product-section .gx-4 {
  --bs-gutter-x: 1.8rem;
}
.product-section .product-section-list {
  margin-top: 40px;
}
.product-section .product-section-list .product-item {
  display: block;
  position: relative;
  overflow: hidden;
  margin-bottom: 30px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3)
}
.product-section .product-section-list .product-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: all 0.5s;
}
.product-section .product-section-list .product-item p {
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.4);
  color: #fff;
  font-size: 18px;
  line-height: 26px;
  padding: 12px 10px;
  text-align: center;
}
.product-section .product-section-list .product-item:hover img {
  transform: scale(1.01);
}
.product-section .bottom-btn {
  margin-top: 10px;
  display: flex;
  justify-content: center;
}
.product-section .bottom-btn a {
  display: block;
  width: 260px;
  line-height: 64px;
  height: 64px;
  color: #201f1f;
  background: #fff;
  font-weight: lighter;
  font-size: 18px;
  border: solid 1px #c7c5c5;
  text-align: center;
}
.product-section .bottom-btn a:hover {
  font-weight: normal;
}

.service-section {
  background: url(../images/product/service_bg.jpg) no-repeat;
  background-size: cover;
  padding: 50px 0 77px;
}
.service-section .section-title a {
  color: #1f1e1e;
}
.service-section .service-list-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.service-section .service-list-group .service-list {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.service-section .service-list-group .service-list .service-item {
  background: #ededf5;
  border-radius: 50%;
  box-shadow: 1px 1px 16px 0px rgba(20, 26, 63, 0.06);
}
.service-section .service-list-group .service-list .service-item .service-bg {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: #fff;
  width: 100%;
  height: 100%;
  border-radius: 50%;
}
.service-section .service-list-group .service-list .service-item .service-bg .icon-2 {
  display: none;
}
.service-section .service-list-group .service-list .service-item .service-bg p {
  color: #1f1e1e;
  margin-top: 5px;
  text-align: center;
}
.service-section .service-list-group .service-list .service-item:hover {
  border: dashed 1px rgba(63, 81, 181, 0.5);
}
.service-section .service-list-group .service-list .service-item:hover .service-bg {
  background: #3f51b5;
}
.service-section .service-list-group .service-list .service-item:hover .service-bg .icon-1 {
  display: none;
}
.service-section .service-list-group .service-list .service-item:hover .service-bg .icon-2 {
  display: block;
}
.service-section .service-list-group .service-list .service-item:hover .service-bg p {
  color: #fff;
}
.service-section .service-list-group .service-arrow1 {
  width: 32px;
  height: 31px;
}

@media (max-width: 475px) {
  .article-nav .nav .nav-item .nav-link p {
    padding: 0 8px !important;
  }
}
@media (max-width: 575px) {
  section .section-title {
    font-size: 24px;
  }
  .case-first {
    padding-bottom: 60px;
  }
  .case-first .first-content {
    flex-wrap: wrap;
  }
  .case-first .first-content .first-content-left {
    width: 100%;
    padding: 12px;
  }
  .case-first .first-content .first-content-left .img-box .bottom-btn {
    bottom: 40px;
  }
  .case-first .first-content .first-content-left .img-box .bottom-btn a {
    width: 170px;
    height: 42px;
    font-size: 16px;
    line-height: 42px;
  }
  .case-first .first-content .first-content-right {
    width: 100%;
    padding: 20px 12px;
  }
  .case-first .first-content .first-content-right .case-title {
    font-size: 22px;
    margin-bottom: 15px;
  }
  .case-first .first-content .first-content-right .case-data, .case-first .first-content .first-content-right .case-desc, .case-first .first-content .first-content-right .tel-link {
    font-size: 18px;
    line-height: 30px;
  }
  .case-first .first-content .first-content-right .case-desc {
    margin: 10px 0 20px;
    padding: 15px;
  }
  .case-first .first-content .first-content-right .tel-link {
    flex-wrap: wrap;
  }
  .case-first .first-content .first-content-right .tel-link b {
    font-size: 30px;
  }
  .article-nav {
    height: 150px;
  }
  .article-nav .nav {
    padding-right: 0;
  }
  .article-nav .nav .nav-item {
    width: 50%;
    height: 50%;
  }
  .article-nav .nav .nav-item .nav-link {
    padding: 15px 0px;
    justify-content: center;
  }
  .article-nav .nav .nav-item .nav-link p {
    font-size: 16px;
    line-height: 24px;
    padding: 0 20px;
  }
  .article-nav .nav .nav-item .active img {
    display: none;
  }
  .case-advantage {
    padding-top: 60px !important;
    padding-bottom: 30px !important;
  }
  .case-advantage .advantage-list .advantage-item {
    width: 100%;
    margin-bottom: 30px;
  }
  .case-advantage .advantage-list .advantage-item .text-box {
    width: 78%;
    padding-bottom: 30px;
  }
  .case-advantage .advantage-list .advantage-item .text-box h2 {
    font-size: 18px;
  }
  .case-advantage .advantage-list .advantage-item .text-box p {
    font-size: 16px;
  }
  .case-advantage .advantage-list .advantage-item .bottom-line {
    width: 83%;
  }
  .case-advantage .advantage-list .advantage-item .icon-box {
    width: 100px;
    height: 112px;
  }
  .case-advantage .advantage-list .advantage-item .icon-box img {
    max-width: 50%;
  }
  .case-advantage .advantage-list .vr-line {
    display: none;
  }
  .product-section .product-section-list {
    margin-top: 25px;
  }
  .product-section .product-section-list .product-item p {
    font-size: 18px;
  }
  .product-section .bottom-btn {
    margin-top: 0px;
  }
  .product-section .bottom-btn a {
    width: 220px;
    line-height: 42px;
    height: 42px;
    font-size: 16px;
  }
  .service-section {
    padding: 30px 0;
  }
  .service-section .service-list-group {
    padding: 0;
    flex-wrap: wrap;
  }
  .service-section .service-list-group .service-arrow1 {
    display: none;
  }
  .service-section .service-list-group .service-list {
    width: 100%;
    margin-top: 25px;
  }
  .service-section .service-list-group .service-list .service-arrow {
    display: none;
  }
  .service-section .service-list-group .service-list .service-item {
    width: 95px;
    height: 95px;
    padding: 5px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg img {
    width: 38px;
    height: 38px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg p {
    font-size: 14px;
  }
}
@media (min-width: 576px) {
  section .section-title {
    font-size: 30px;
  }
  .case-first {
    padding-bottom: 60px;
  }
  .case-first .first-content {
    flex-wrap: wrap;
  }
  .case-first .first-content .first-content-left {
    width: 100%;
    padding: 12px;
  }
  .case-first .first-content .first-content-left .img-box .bottom-btn {
    bottom: 20px;
  }
  .case-first .first-content .first-content-left .img-box .bottom-btn a {
    width: 200px;
    height: 50px;
    font-size: 18px;
    line-height: 50px;
  }
  .case-first .first-content .first-content-right {
    width: 100%;
    padding: 20px 12px;
  }
  .case-first .first-content .first-content-right .case-title {
    font-size: 24px;
    margin-bottom: 15px;
  }
  .case-first .first-content .first-content-right .case-data, .case-first .first-content .first-content-right .case-desc, .case-first .first-content .first-content-right .tel-link {
    font-size: 18px;
    line-height: 30px;
  }
  .case-first .first-content .first-content-right .case-desc {
    margin: 10px 0 20px;
    padding: 15px 20px;
  }
  .case-first .first-content .first-content-right .tel-link b {
    font-size: 34px;
  }
  .article-nav {
    height: 80px;
  }
  .article-nav .nav {
    max-width: 100%;
    padding-right: 0;
  }
  .article-nav .nav .nav-item .nav-link {
    padding: 20px 0 0;
  }
  .article-nav .nav .nav-item .nav-link p {
    font-size: 18px;
    line-height: 18px;
  }
  .article-nav .nav .nav-item .active img {
    width: 22px;
    height: 16px;
    margin-top: 5px;
  }
  .case-advantage .advantage-list .advantage-item {
    width: 100%;
    margin-bottom: 30px;
  }
  .case-advantage .advantage-list .advantage-item .text-box {
    width: 78%;
    padding-bottom: 45px;
  }
  .case-advantage .advantage-list .advantage-item .text-box h2 {
    font-size: 20px;
  }
  .case-advantage .advantage-list .advantage-item .text-box p {
    font-size: 18px;
  }
  .case-advantage .advantage-list .advantage-item .bottom-line {
    width: 83%;
  }
  .case-advantage .advantage-list .advantage-item .icon-box {
    width: 112px;
    height: 124px;
  }
  .case-advantage .advantage-list .advantage-item .icon-box img {
    max-width: none;
  }
  .case-advantage .advantage-list .vr-line {
    display: none;
  }
  .product-section .product-section-list .product-item p {
    font-size: 18px;
  }
  .service-section .service-list-group {
    padding: 0 12px;
    flex-wrap: wrap;
    max-width: 540px;
    margin: 0 auto;
  }
  .service-section .service-list-group .service-arrow1 {
    display: none;
  }
  .service-section .service-list-group .service-list {
    width: 100%;
    margin-top: 25px;
  }
  .service-section .service-list-group .service-list .service-item {
    width: 95px;
    height: 95px;
    padding: 5px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg img {
    width: 38px;
    height: 38px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg p {
    font-size: 15px;
  }
}
@media (min-width: 768px) {
  .article-nav .nav {
    max-width: 720px;
    padding: 0 12px;
  }
  .article-nav .nav .nav-item .nav-link {
    padding: 30px 0 0;
  }
  .article-nav .nav .nav-item .nav-link p {
    font-size: 18px;
    line-height: 20px;
  }
  .case-advantage .advantage-list .advantage-item .text-box {
    width: 82%;
    padding-bottom: 60px;
  }
  .case-advantage .advantage-list .advantage-item .bottom-line {
    width: 92%;
  }
  .service-section .service-list-group {
    max-width: none;
  }
  .service-section .service-list-group .service-list {
    margin-top: 45px;
  }
  .service-section .service-list-group .service-list .service-item {
    width: 140px;
    height: 140px;
    padding: 9px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg img {
    width: 48px;
    height: 48px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg p {
    font-size: 18px;
  }
}
@media (min-width: 992px) {
  section .section-title {
    font-size: 36px;
  }
  .article-nav .nav {
    max-width: 960px;
  }
  .case-advantage .advantage-list .advantage-item {
    width: 47%;
    margin-bottom: 40px;
  }
  .case-advantage .advantage-list .advantage-item .text-box {
    width: 78%;
    padding-bottom: 50px;
  }
  .case-advantage .advantage-list .advantage-item .text-box h2 {
    font-size: 20px;
  }
  .case-advantage .advantage-list .advantage-item .text-box p {
    font-size: 18px;
  }
  .case-advantage .advantage-list .advantage-item .bottom-line {
    width: 83%;
  }
  .case-advantage .advantage-list .advantage-item:nth-child(3), .case-advantage .advantage-list .advantage-item:nth-child(4) {
    margin-bottom: 0px;
  }
  .case-advantage .advantage-list .vr-line {
    display: block;
  }
  .service-section .service-list-group {
    max-width: 960px;
    margin: 0 auto;
  }
}
@media (min-width: 1200px) {
  .case-first {
    padding-bottom: 50px;
  }
  .case-first .first-content .first-content-left {
    width: 54.028%;
    padding: 22px 14px;
  }
  .case-first .first-content .first-content-right {
    width: 45.972%;
    padding: 20px 20px 20px 6px;
  }
  .case-first .first-content .first-content-right .case-title {
    margin-bottom: 12px;
    font-size: 22px;
  }
  .case-first .first-content .first-content-right .case-data, .case-first .first-content .first-content-right .case-desc, .case-first .first-content .first-content-right .tel-link {
    font-size: 16px;
    line-height: 26px;
  }
  .case-first .first-content .first-content-right .case-desc {
    margin: 15px 0;
    padding: 10px;
  }
  .case-first .first-content .first-content-right .tel-link b {
    font-size: 30px;
  }
  .article-nav {
    height: 96px;
  }
  .article-nav .nav {
    max-width: 1140px;
  }
  .article-nav .nav .nav-item .nav-link {
    padding: 30px 0 0;
  }
  .article-nav .nav .nav-item .nav-link p {
    font-size: 22px;
    line-height: 30px;
  }
  .article-nav .nav .nav-item .active img {
    width: 24px;
    height: 20px;
    margin-top: 3px;
  }
  .service-section .service-list-group {
    margin-top: 50px;
    max-width: none;
  }
  .service-section .service-list-group .service-arrow1 {
    display: block;
  }
  .service-section .service-list-group .service-list {
    width: 47.8%;
    margin-top: 0;
  }
  .service-section .service-list-group .service-list .service-item {
    width: 110px;
    height: 110px;
    padding: 6px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg img {
    width: 42px;
    height: 42px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg p {
    font-size: 16px;
  }
}
@media (min-width: 1400px) {
  section .section-title {
    font-size: 38px;
  }
  .article-nav .nav {
    max-width: 1320px;
  }
  section .section-text {
    font-size: 20px;
  }
  .case-first .first-content .first-content-right {
    padding: 25px 30px 30px 16px;
  }
  .case-first .first-content .first-content-right .case-title {
    font-size: 26px;
  }
  .case-first .first-content .first-content-right .case-data, .case-first .first-content .first-content-right .case-desc, .case-first .first-content .first-content-right .tel-link {
    font-size: 18px;
    line-height: 30px;
  }
  .case-first .first-content .first-content-right .case-desc {
    margin: 15px 0;
    padding: 10px;
  }
  .case-first .first-content .first-content-right .tel-link b {
    font-size: 34px;
  }
  .case-advantage .advantage-list .advantage-item {
    width: 45%;
    min-height:141px;
  }
  .case-advantage .advantage-list .advantage-item .bottom-line {
    width: 90%;
  }
  .case-advantage .advantage-list .advantage-item .text-box h2 {
    font-size: 24px;
  }
  .case-advantage .advantage-list .advantage-item .text-box p {
    font-size: 20px;
  }
  .product-section .product-section-list .product-item p {
    font-size: 20px;
  }
  .service-section .service-list-group {
    padding: 0 30px;
  }
  .service-section .service-list-group .service-list .service-item {
    width: 118px;
    height: 118px;
    padding: 6px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg img {
    width: 42px;
    height: 42px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg p {
    font-size: 16px;
  }
}
@media (min-width: 1600px) {
  section .section-title {
    font-size: 44px;
  }
  .article-nav .nav {
    max-width: 1440px;
    padding: 0 15px;
  }
  .case-first .first-content .first-content-right .case-title {
    font-size: 28px;
  }
  .case-first .first-content .first-content-right {
    padding: 20px;
  }
  .case-first .first-content .first-content-right .case-data, .case-first .first-content .first-content-right .case-desc, .case-first .first-content .first-content-right .tel-link {
    line-height: 30px;
  }
  .case-first .first-content .first-content-right .case-desc {
    margin: 15px 0;
    padding: 15px;
  }
  .case-first .first-content .first-content-right .tel-link b {
    font-size: 38px;
  }
  .service-section .service-list-group .service-list {
    width: 47.2%;
  }
  .service-section .service-list-group {
    padding: 0 50px;
  }
  .service-section .service-list-group .service-list .service-item {
    width: 150px;
    height: 150px;
    padding: 8px;
  }
  .service-section .service-list-group .service-list .service-item .service-bg img {
    width: 48px;
    height: 48px;
  }
}