body {
  background: #fff;
}

section .section-title {
  font-weight: bold;
}
section .section-text {
  margin-top: 15px;
  font-size: 20px;
  line-height: 34px;
}

.banner {
  background: url(../images/about/banner.jpg) no-repeat right;
  background-size: cover;
}
.banner .banner-img {
  width: 100%;
  height: auto;
  display: block;
}
.banner .page-nav {
  padding-top: 35px;
  color: #000;
  font-size: 20px;
}
.banner .page-nav a {
  color: #000;
  font-size: 20px;
  line-height: 36px;
}
.banner .page-nav a:last-child {
  cursor: text;
}
.banner .page-nav a:last-child span {
  color: #f9bb0b;
  border-bottom: solid 1px #f9bb0b;
  padding-bottom: 5px;
}
.banner .page-nav a:last-child:hover {
  font-weight: normal;
}
.banner .page-nav a:hover {
  font-weight: 700;
}
.banner .banner-text {
  background: rgba(255, 255, 255, 0.9);
}
.banner .banner-text .section-title {
  color: #243f80;
}
.banner .banner-text span {
  display: block;
  width: 116px;
  height: 7px;
  background-color: #ff9600;
  margin: 22px 0;
}
.banner .banner-text .section-text {
  color: #000;
  font-weight: normal;
}
.banner .banner-list {
  width: 100%;
  display: flex;
  justify-content: space-between;
}
.banner .banner-list .list-item {
  width: 25%;
  text-align: center;
  line-height: 1.5;
  color: #fff;
  border-right: 2px solid rgba(255, 255, 255, 0.29);
  font-weight: lighter;
}
.banner .banner-list .list-item b {
  font-weight: bold;
}
.banner .banner-list .list-item:last-child {
  border-right: 0;
}

.about-first {
  background-color: #eeeeee;
}
.about-first .section-title {
  color: #243f80;
  text-align: center;
}
.about-first span {
  display: block;
  width: 116px;
  height: 7px;
  background-color: #ff9600;
  margin: 26px auto 22px;
}
.about-first .section-text {
  color: #000;
  font-weight: normal;
  text-align: center;
}
.about-first .first-btn {
  width: 184px;
  height: 45px;
  background-color: #ffffff;
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 50px auto 0;
  font-size: 20px;
}
.about-first .first-btn img {
  margin-left: 15px;
}
.about-first .first-btn:hover {
  font-weight: bold;
}

.about-second {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
.about-second .second-left {
  color: #333;
}
.about-second .second-left h2 {
  font-weight: bold;
  margin-top: 13px;
}
.about-second .second-left span {
  display: block;
  width: 89px;
  height: 7px;
  background-color: #ff9600;
  margin: 26px 0 22px;
}
.about-second .second-right .mySwiper .swiper-wrapper .swiper-slide {
  box-shadow: 4px 4px 13px rgba(0, 0, 0, 0.18);
}
.about-second .second-right .mySwiper .swiper-wrapper .swiper-slide img {
  width: 100%;
  height: auto;
  display: block;
}
.about-second .second-right .mySwiper .swiper-button-prev:after, .about-second .second-right .mySwiper .swiper-button-next:after {
  content: "";
  width: 60px;
  height: 36px;
  background: url(../images/about/second_arrow.png) no-repeat;
}
.about-second .second-right .mySwiper .swiper-button-next:after {
  background: url(../images/about/second_arrow.png) no-repeat;
  transform: scaleX(-1);
}
.about-second .second-right .mySwiper .swiper-button-prev, .about-second .second-right .mySwiper .swiper-button-next {
  width: 60px;
  height: 36px;
}

@media (max-width: 575px) {
  section .section-title {
    font-size: 24px;
  }
  section .section-text {
    font-size: 18px;
    line-height: 28px;
  }
  .banner .page-nav {
    padding-left: 12px;
  }
  .banner .banner-text {
    margin-top: 40px;
    width: 100%;
    padding: 60px 12px 40px 12px;
  }
  .banner .banner-list {
    background: #143177;
    flex-wrap: wrap;
    padding: 20px;
  }
  .banner .banner-list .list-item {
    width: 50%;
    font-size: 18px;
    padding: 20px 0;
    border-bottom: 2px solid rgba(255, 255, 255, 0.29);
  }
  .banner .banner-list .list-item b {
    font-size: 30px;
  }
  .banner .banner-list .list-item:nth-child(2) {
    border-right: 0;
  }
  .banner .banner-list .list-item:nth-child(3), .banner .banner-list .list-item:nth-child(4) {
    border-bottom: none;
  }
  .about-first {
    padding: 30px 12px;
  }
  .about-first span {
    margin: 10px auto;
  }
  .about-second {
    padding: 30px 12px 20px;
  }
  .about-second .second-left {
    width: 100%;
    margin-bottom: 35px;
  }
  .about-second .second-left h2 {
    font-size: 18px;
  }
  .about-second .second-left span{
    margin: 10px 0;
  }
  .about-second .second-right {
    width: 100%;
  }
  .about-third {
    display: flex;
    flex-direction: column-reverse;
  }
  .about-third .img-l {
    display: none;
  }
  .about-third .img-s {
    display: block;
    width: 100%;
    height: auto;
  }
  .about-third .third-content {
    padding: 20px 12px;
  }
  .about-third .third-content .third-text {
    color: #333;
  }
  .about-third .third-content .third-text span {
    display: block;
    width: 91px;
    height: 7px;
    background-color: #ffc600;
    margin: 10px 0;
  }
  .about-fourth {
    display: flex;
    flex-direction: column-reverse;
  }
  .about-fourth .img-l {
    display: none;
  }
  .about-fourth .img-s {
    display: block;
    width: 100%;
    height: auto;
  }
  .about-fourth .fourth-content {
    padding: 40px 12px 20px;
  }
  .about-fourth .fourth-content .fourth-text {
    color: #333;
  }
  .about-fourth .fourth-content .fourth-text span {
    display: block;
    width: 91px;
    height: 7px;
    background-color: #ffc600;
    margin: 10px 0;
  }
}
@media (min-width: 576px) {
  section .section-title {
    font-size: 30px;
  }
  section .section-text {
    font-size: 18px;
    line-height: 30px;
  }
  .banner .page-nav {
    padding-left: 12px;
  }
  .banner .banner-text {
    margin-top: 60px;
    width: 100%;
    padding: 40px 20px 40px 12px;
  }
  .banner .banner-list {
    background: #143177;
    padding: 30px 0;
  }
  .banner .banner-list .list-item {
    font-size: 18px;
  }
  .banner .banner-list .list-item b {
    font-size: 30px;
  }
  .about-first {
    padding: 30px 12px;
  }
  .about-first span {
    margin: 15px auto;
  }
  .about-second .second-left span{
    margin: 15px 0;
  }
  .about-second {
    padding: 30px 12px;
  }
  .about-second .second-left {
    width: 100%;
    margin-bottom: 35px;
    padding: 0 18px;
  }
  .about-second .second-left h2 {
    font-size: 20px;
  }
  .about-second .second-right {
    width: 100%;
  }
  .about-second .second-right .mySwiper .swiper-wrapper .swiper-slide {
    width: 66.5%;
  }
  .about-second .second-right .mySwiper .swiper-button-prev {
    left: 13.5%;
  }
  .about-second .second-right .mySwiper .swiper-button-next {
    right: 13.5%;
  }
  .about-third {
    display: flex;
    flex-direction: column-reverse;
  }
  .about-third .img-l {
    display: none;
  }
  .about-third .img-s {
    display: block;
    width: 100%;
    height: auto;
  }
  .about-third .third-content {
    padding: 40px 30px;
  }
  .about-third .third-content .third-text {
    color: #333;
  }
  .about-third .third-content .third-text span {
    display: block;
    width: 91px;
    height: 7px;
    background-color: #ffc600;
    margin: 15px 0;
  }
  .about-fourth {
    display: flex;
    flex-direction: column-reverse;
  }
  .about-fourth .img-l {
    display: none;
  }
  .about-fourth .img-s {
    display: block;
    width: 100%;
    height: auto;
  }
  .about-fourth .fourth-content {
    padding: 40px 30px;
  }
  .about-fourth .fourth-content .fourth-text {
    color: #333;
  }
  .about-fourth .fourth-content .fourth-text span {
    display: block;
    width: 88px;
    height: 10px;
    background-color: #ffc600;
    margin: 15px 0;
  }
}
@media (min-width: 992px) {
  section .section-title {
    font-size: 34px;
  }
  .banner .page-nav {
    padding-left: 70px;
  }
  .banner .banner-text {
    margin-top: 60px;
    width: 75%;
    padding: 40px 50px 40px 70px;
  }
  .banner .banner-list {
    background: url(../images/about/text_bg.png) no-repeat;
    background-size: 100% 100%;
    margin-top: -80px;
    padding: 200px 0 20px;
  }
  .banner .banner-list .list-item {
    font-size: 20px;
  }
  .banner .banner-list .list-item b {
    font-size: 36px;
  }
}
@media (min-width: 1200px) {
  .banner .banner-list {
    padding: 240px 0 20px;
  }
  .about-second {
    background: url(../images/about/second_bg.jpg) no-repeat;
    background-size: 100% 100%;
    padding: 355px 70px 65px;
    max-width: none;
  }
  .about-second .second-left {
    width: 43%;
    margin-bottom: 0;
  }
  .about-second .second-left h2 {
    font-size: 22px;
  }
  .about-second .second-right {
    width: 57%;
  }
  .about-third {
    position: relative;
  }
  .about-third .img-s {
    display: none;
  }
  .about-third .img-l {
    display: block;
    width: 100%;
    height: auto;
  }
  .about-third .third-content {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    display: flex;
    justify-content: end;
    align-items: center;
    padding-right: 70px;
  }
  .about-third .third-content .third-text {
    width: 43%;
    color: #fff;
  }
  .about-fourth {
    position: relative;
  }
  .about-fourth .img-s {
    display: none;
  }
  .about-fourth .img-l {
    display: block;
    width: 100%;
    height: auto;
  }
  .about-fourth .fourth-content {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    display: flex;
    justify-content: start;
    align-items: center;
    padding-left: 70px;
  }
  .about-fourth .fourth-content .fourth-text {
    width: 43%;
    color: #000;
  }
}
@media (min-width: 1400px) {
  section .section-title {
    font-size: 38px;
  }
  .banner .page-nav {
    padding-left: 100px;
  }
  .banner .banner-text {
    margin-top: 100px;
    width: 60%;
    padding: 40px 50px 40px 100px;
  }
  .banner .banner-list {
    padding: 280px 0 25px;
  }
  .banner .banner-list .list-item {
    font-size: 24px;
  }
  .banner .banner-list .list-item b {
    font-size: 40px;
  }
  .about-first {
    padding: 50px 12px 30px;
  }
  .about-second {
    padding: 355px 100px 65px;
  }
  .about-second .second-left {
    width: 48%;
  }
  .about-second .second-right {
    width: 52%;
  }
  .about-third .third-content {
    padding: 10px 100px 10px 0;
  }
  .about-third .third-content .third-text {
    width: 50%;
  }
  .about-third .third-content .third-text span {
    margin: 25px 0 35px;
  }
  .about-fourth .fourth-content {
    padding-left: 100px;
  }
  .about-fourth .fourth-content .fourth-text {
    width: 46%;
  }
  .about-fourth .fourth-content .fourth-text span {
    margin: 25px 0 35px;
  }
}
@media (min-width: 1600px) {
  section .section-title {
    font-size: 40px;
  }
  .banner .page-nav {
    padding-left: 160px;
  }
  .banner .banner-text {
    margin-top: 55px;
    width: 50%;
    padding: 40px 40px 50px 160px;
  }
  .banner .banner-list {
    margin-top: -120px;
    padding: 330px 0 25px;
  }
  .banner .banner-list .list-item b {
    font-size: 46px;
  }
  .about-second {
    padding: 485px 195px 85px;
  }
  .about-second .second-left h2 {
    font-size: 24px;
  }
  .about-third .third-content {
    padding-right: 195px;
  }
  .about-fourth .fourth-content {
    padding-left: 195px;
  }
}
@media (min-width: 1800px) {
  .banner .banner-list {
    padding: 350px 0 25px;
  }
  .about-second {
    padding: 400px 195px 85px;
  }
  .about-second .second-left {
    width: 40%;
  }
  .about-second .second-right {
    width: 60%;
  }
  .about-third .third-content {
    padding: 10px 195px 10px 0;
  }
  .about-third .third-content .third-text {
    width: 37%;
  }
  .about-fourth .fourth-content .fourth-text {
    width: 37%;
  }
}