/** reset **/
* {
  box-sizing: border-box;
  color: #333;
  padding: 0;
  margin: 0;
} 
html {
  font-size: 16px;
}
body {
  font-family: 微软雅黑, "Microsoft YaHei", MiSans, 思源黑体, "Source Han Sans CN"
}
li {
  list-style: none;
}
a {
  text-decoration: none;
  color: #333;
  cursor: pointer;
  outline: none;
}

.header {
  width: 100%;
  height: 7.75em;
  position: relative;
  z-index: 9999;
  position: fixed;
  top: 0;
  background-color: transparent;
  transition: background-color 0.3s ease;
}

/* Header with background color after scrolling */
.header.scrolled {
  background-color: rgba(27, 65, 139, 0.8);
}

.container {
  width: 1530px;
  max-width: 92%;
  margin: 0 auto;
}

.header-bar {
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header-nav ul{
  display: flex;
  font-size: 1em;
}
.header-nav li {
  position: relative;
  padding: 10px 0;
}
.header-nav li:hover .submenu{
  visibility: visible;
}
.header-nav .submenu {
  margin-top: 5px;
  padding-top: 5px;
  position: absolute;
  visibility: hidden;
  left: 0;
  display: flex;
  flex-direction: column;
  box-shadow: 1px 3px 2px rgba(128, 128, 128, 0.5);
  width: 100%;
  background-color: #FFF;
}
.header-nav .submenu li {
  padding: 10px 0;
  text-align: center;
}
.header-nav .submenu a {
  color: #666;
  font-size: 0.85em;
}
.header-nav a {
  color: #FFF;
  padding: 0 20px;
  font-weight: 500;
}
.header-logo img{
  height: 3.125em;
}
.index-main {
  /* margin-top: -7.75em; */
}

/* Mobile menu styles */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  z-index: 1000;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: #FFF;
  margin: 3px 0;
  transition: 0.3s;
}

/* Animation for hamburger menu */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  z-index: 999;
  overflow-y: auto;
  padding-top: 2em;
}

.mobile-menu.active {
  display: block;
}

.mobile-menu ul {
  flex-direction: column;
  align-items: center;
}

.mobile-menu li {
  padding: 5px 0;
  text-align: center;
  width: 100%;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-menu li:last-child {
  border-bottom: none;
}
.mobile-menu .submenu li {
  padding: 1px 0;
  border: none;
  font-size: 12px;
}

.mobile-menu a {
  color: #FFF; /* Keep white color for better visibility */
  font-size: 1.2em;
  display: block;
  padding: 10px 0;
}

.hero-content {
  width: 100%;
  height: 750px;
}
.section {
  padding: 6.25em 0 6.375em;
}
.section-title {
  font-size: 2.25em;
  text-align: center;
  z-index: 100;
  position: relative;
}
.section-content {
  display: flex;
  justify-content: space-between;
  padding: 80px 1% 0;
}
.brief-text {
  width: 48%;
  font-size: 1.125em;
  text-indent: 2em;
  line-height: 2;
  text-align: justify;
}
.brief-video{
  width: 48%;
  text-align: right;
}

.brief-video video {
  width: 100%;
  height: auto;
}

.brief-more {
  display: block;
  width: 8.75em;
  height: 3.125em;
  line-height: 3.125em;
  text-align: center;
  background-color: #254AE5;
  color: #FFF;
  border-radius: 5px;
  text-indent: 0;
  font-size: 1em;
  margin-top: 50px;
}
.section-subtitle {
  font-size: 1.125em;
  text-align: center;
  padding-top: 20px;
}
.business {
  background-color: #FAFAFA;
}
.business-item {
  width: 32.6%;
  padding: 0 15px;
  position: relative;
}
.business-content {
  display: flex;
  justify-content: center;
}
.business-content img {
  width: 100%;
  height: 100%;
}
.infomation-item {
  width: 30%;
  text-align: justify;
}
.business-item-title {
  position: absolute;
  top: 60px;
  left: 80px;
  font-size: 1.5em;
  color: #FFF;
}
.infomation-time div{
  padding: 0 8px;
}
.infomation-time b{
  font-size: 3.25em;
}
.infomation-title {
  font-size: 1.625em;
  line-height: 1.5;
  padding: 20px 0;
}
.infomation-text {
  color: #888;
  font-size: 1em;
  line-height: 1.8;
}
.infomation-more {
  display: flex;
  justify-content: center;
}
.infomation-more a{
  display: block;
  width: 8.75em;
  height: 3.75em;
  line-height: 3.75em;
  text-align: center;
  background-color: #254AE5;
  color: #FFF;
  border-radius: 5px;
  text-indent: 0;
  font-size: 1em;
  margin-top: 80px;
}
.partners {
  background-color: #FAFAFA;
}
.partners-content li {
  width: 16.66%;
  height: 76px;
  text-align: center;
  padding: 10px 0;
  display: flex;
  justify-content: center;
}
.partners-content li img {
  max-width: 80%;
  max-height: 80%;
}
.footer {
  padding: 60px 0;
  text-align: center;
  background-color: #333;
}
.footer-text {
  color: #FFF;
}
.about-hero {
  width: 100%;
  height: 550px;
  position: relative;
} 
.about-hero .slogan {
  position: absolute;
  font-size: 2.3em;
  top: 30%;
  width: 100%;
}
.about-hero .container {
  color: #FFF;
  padding-left: 2%;
}
.hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about-text {
  font-size: 1em;
  line-height: 2.3;
}
.about-text p {
  text-indent: 2em;
  padding-bottom: 20px;
}
.culture {
  background-color: #F7F7F7;
  z-index: 100;
  position: relative;
}
.culture-img {
  width: 50%;
  text-align: center;
}
.culture-img img {
  width: 80%;
  height: auto;
  object-fit: cover;
}
.culture-text {
  width: 48%;
}
.culture-title {
  font-size: 1.625em;
}
.culture-content {
  font-size: 0.9375em;
  color: #666;
  padding-top: 1.25em;
  padding-bottom: 2.5em;
}
.histroy-content {
  width: 1200px;
  justify-content: center;
}

.honor {
  background: #ECECEC;
}

.timeline {
  position: relative;
  max-width: 1200px;
  margin: 50px auto 0;
}
.timeline .event:first-child::before{
  content: "";
  position: absolute;
  width: 4px;
  background-color: #FFF;
  height: 500px;
  left: 50%;
  margin-left: -2px;
  bottom: 50%;
}
.timeline .event:last-child::before{
  content: "";
  position: absolute;
  width: 4px;
  background-color: #FFF;
  height: 50%;
  left: 50%;
  margin-left: -2px;
  bottom: 0;
}
.event::after {
  content: "";
  display: block;
  position: absolute;
  background-color: #ddd;
  width: 1px;
  left: 50%;
  top: 0;
  bottom: 0;
  margin-left: -0.5px;
  z-index: -1;
}
.event {
  display: flex;
  padding: 4% 0;
  align-items: center;
  justify-content: space-between;
  position: relative;
  flex-direction: row;
}
.timeline .event:nth-child(even) {
  flex-direction: row-reverse;
}
.timeline .event:nth-child(even) h3 {
  text-align: left;
  padding-left: 5%;
  padding-right: 10%;
}
.timeline .event:nth-child(even) .event-text {
  text-align: right;
  padding-left: 10%;
  padding-right: 5%;
}
.event-dot {
  border: 0.5em solid #FFF;
  width: 1.6em;
  height: 1.6em;
  background-color: #003a8c;
  border-radius: 50%;
  position: absolute;
  left: 50%;
  margin-left: -0.8em;
}
.event h3 {
  width: 50%;
  text-align: right;
  padding-left: 10%;
  padding-right: 5%;
  font-size: 2.5em;
  color: #003a8c;
}
.event-text {
  width: 50%;
  padding-left: 5%;
  padding-right: 10%;
  color: #555;
  line-height: 1.86;
  vertical-align: middle;
}
.event-text p {
  padding: 0 0 15px;
}
.honor-content {
  display: flex;
  flex-wrap: wrap;
  margin-top: 20px;
}
.honor-item {
  width: 33.33%;
  padding: 3% 5%;
}
.honor-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.honor-text {
  text-align: center;
}

.banner {
  position: relative;
}
.banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.banner .slogan {
  position: absolute;
  font-size: 2.3em;
  top: 40%;
  width: 100%;
}
.banner .container {
  color: #FFF;
  padding-left: 2%;
}

.list-tab ul {
  display: flex;
  position: relative;
}
.list-tab ul::after {
  content: "";
  display: block;
  border: 1px solid #ddd;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: -1;
}
.list-tab li {
  position: relative;
}
.list-tab .active a {
  color: #003a8c;
}
.list-tab .active::after {
  content: "";
  display: block;
  height: 2px;
  background-color: #003a8c;
  position: absolute;
  bottom: 0;
  left: 30%;
  right: 30%;
}
.list-tab li {
  padding: 20px;
}
.list-container {
  width: 1200px;
}
.list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5% 0;
}
.list-time {
  width: 8%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.list-time b {
  font-size: 3.25em;
  font-weight: 400;
}
.list-content {
  width: 90%;
}
.list-title {
  font-size: 1.625em;
  color: #333;
  padding-bottom: 1em;
  font-weight: normal;
}
.list-text {
  color: #888;
}
.pager {
  margin-top: 4.64%;
  text-align: center;
}
.pager .arrow {
  display: inline-block;
  vertical-align: middle;
}
/* .pager .prev::before {
  content: '';
  font-family: "FontAwesome";
  content: "\f104";
} */
.pager-holder {
  display: inline-block;
  vertical-align: middle;
}
.pager-holder a {
  font-size: 1.125em;
  color: #999;
  margin: 0 1em;
}
.pager-holder .pager-current {
  color: #003a8c;
}
.list-main .section{
  padding-top: 2em;
}
.header-white {
  background-color: #FFF;
  border-bottom: 1px solid #DDD;
}
.header-white a {
  color: #333;
}
.header-white .mobile-menu-toggle span {
  background-color: #CCC;
}
.detail-main {
  padding: 0 20px;
}
.detail-main {
  margin-top: 7.75em;
}
.detail-main .section {
  padding-top: 2em;
}
.detail-main .container {
  max-width: 700px;
  width: 100%;
}
.detail-title {
  text-align: center;
  padding-bottom: 4%;
  border-bottom: 1px solid #DDD;
}
.detail-title-text {
  font-size: 1.875em;
  padding: 3% 0;
}
.detail-title-bar {
  text-align: center;
}
.detail-title-bar span {
  padding-right: 10px;
  font-size: 0.95em;
  color: #888;
}
.detail-content {
  margin: 2.8% 0 3.5%;
  line-height: 2;
}
.detail-content *{
  color: #555;
}
.detail-content img {
  max-width: 96%;
}
.detail-content p {
  line-height: 2;
  padding-bottom: 2%;
  text-align: justify;
}
.business-container {
  display: flex;
  justify-content: space-between;
}
.business-container {
  width: 1366px;
}
.business-text {
  width: 51.2%;
}
.business-text p{
  text-indent: 2em;
  text-align: justify;
  font-size: 0.875em;
  color: #333;
  line-height: 2.14;
  margin-bottom: 0.57em;
}
.advantage {
  width: 38%;
}
.advantage-title {
  font-size: 2.25em;
  color: #003a8c;
  line-height: 1.5;
  padding-bottom: 1.67em;
  text-align: justify;
}
.advantage-text p{
  font-size: 1em;
  color: #666;
  line-height: 2;
}
.advantage-text p::before {
  content: "";
  display: inline-block;
  width: 0.4em;
  height: 0.4em;
  background-color: #003a8c;
  border-radius: 50%;
  margin-right: 1em;
  vertical-align: middle;
}
.contact-main .container {
  width: 1210px;
}
.contact-content {
  display: flex;
  flex-wrap: wrap;
  margin-top: 5em;
}
.contact-item {
  width: 33.33%;
}
.contact-item img{
  width: 22.75em;
  height: 14.375em;
  object-fit: contain;
}
.map-div {
  width: 22.75em;
  height: 14.375em;
}
.contact-title {
  font-size: 1.875em;
  padding: 1.25em 0;
}
.contact-text-content p {
  font-size: 0.85em;
  color: #666;
  line-height: 2;
}
.contact-main {
  margin-top: 7.75em;
}

.footer-text a {
  color: #FFF;
}

@media (max-width: 1530px) {
  html {
    font-size: 14px;
  }
}
@media (max-width: 1280px) {
  .list-container {
    width: 1000px;
  }
}

@media (max-width: 768px) {
  .header {
    height: 5em;
  }
  .header-nav ul {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .about-hero .slogan {
    font-size: 1.6em;
  }

  .about-hero .slogan {
    top: 50%;
  }

  .event h3 {
    font-size: 1.6em;
  }

  /* Smaller logo on mobile */
  .header-logo {
    height: 50%;
  }
  .header-logo img {
    height: 100%;
  }

  .header a {
    color: #FFF;
  }

  .header.scrolled a {
    color: #FFF;
  }
  
  .banner .slogan {
    font-size: 1.8em;
  }

  .list-main .section {
    padding-top: 0;
  }

  .about-hero, .banner {
    height: 250px;
  }

  .section {
    padding: 3em 0;
  }

  .section-title {
    font-size: 1.8em;
    padding: 0 10px;
  }

  .section-content {
    padding: 30px 0 0;
  }

  .brief-text{
    width: 100%;
  }

  .brief-video {
    display: none;
  }

  .brief-text {
    font-size: 1em;
    line-height: 1.8;
    padding: 0 10px;
  }

  /* Smaller buttons on mobile */
  .brief-more {
    margin-top: 30px;
    width: 100%;
    max-width: 150px;
    height: 2.5em;
    line-height: 2.5em;
    margin-left: auto;
    margin-right: auto;
    font-size: 0.9em;
  }

  .business-content {
    flex-direction: column;
  }

  .business-item {
    width: 100%;
    margin-bottom: 20px;
    padding: 0;
  }

  .business-item-title {
    top: 30px;
    left: 20px;
    font-size: 1.2em;
  }

  .infomation-content {
    flex-direction: column;
  }

  .infomation-item {
    width: 100%;
    margin-bottom: 30px;
  }

  .infomation-title {
    font-size: 1.3em;
    padding: 15px 0;
  }

  .infomation-text {
    font-size: 0.9em;
  }

  .infomation-more {
    margin-top: 0;
  }

  /* Smaller buttons on mobile */
  .infomation-more a {
    width: 100%;
    max-width: 150px;
    height: 2.5em;
    line-height: 2.5em;
    margin-left: auto;
    margin-right: auto;
    font-size: 0.9em;
    margin-top: 0;
  }

  .partners-content {
    flex-wrap: wrap;
    column-gap: 10px;
  }

  .partners-content li {
    flex-basis: 48%;
    height: 100px;
    border: 1px solid #eee;
    box-sizing: border-box;
    padding: 0 10px;
    display: flex;
    align-items: center;
  }
  .hero-content {
    height: 400px;
  }

  .culture-img {
    display: none;
  }

  .culture-text {
    width: 100%;
  }

  .honor-item {
    padding: 1% 2%;
  }

  .honor-text {
    display: none;
  }
  .footer {
    padding: 20px 0;
    font-size: 12px;
  }
  .contact-content {
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .business-container {
    flex-direction: column;
  }
  .contact-item {
    width: 22.75em;
  }
  .list-container {
    width: 100%;
  }
  .list-tab li {
    padding: 20px 10px;
  }
  .list-time {
    width: 20%;
    box-sizing: border-box;
    padding: 0 5px;
  }
  .list-content {
    width: 80%;
    box-sizing: border-box;
    padding: 0 10px;
    text-align: justify;
  }
  .list-title {
    font-size: 1.1em;
    font-weight: normal;
    padding-bottom: 0.5em;
  }
  .list-text {
    font-size: 0.9em;
  }
  .list-time b {
    font-size: 2.5em;
  }
  .advantage {
    width: 100%;
  }
  .advantage-title {
    font-size: 1.5em;
    padding-bottom: 0.8em;
  }
  .business-text {
    width: 100%;
  }
  .detail-main {
    margin-top: 5em;
  }
  .detail-title-text {
    font-size: 1.6em;
  }
  .detail-main .section {
    padding-top: 10px;
  }
  .contact-main {
    margin-top: 5em;
  }
  .contact-content {
    margin-top: 20px;
  }
  .contact-title {
    padding: 10px 0;
    font-size: 1.2em;
  }
  .contact-text {
    padding-bottom: 10px;
  }
}

@media (max-width: 480px) {
  .partners-content li {
    flex-basis: 48%;
  }

  .section {
    padding: 2em 0;
  }

  .section-title {
    font-size: 1.5em;
  }

  .hero-content {
    height: 300px;
  }

  .brief-text {
    font-size: 0.9em;
  }

  .business-item-title {
    font-size: 1em;
    top: 20px;
    left: 15px;
  }

  .infomation-title {
    font-size: 1.1em;
  }

  .infomation-time b {
    font-size: 2.5em;
  }
}