.accordion {
  position: relative;
  white-space: nowrap;
  font-size: 0;
}
.accordion-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 1;
  transition: all 1s ease;
}
.accordion-bg::after {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 102, 235, 0.5);
}
.accordion-bg img {
  width: 100%;
  height: 100%;
}
.accordion:hover .accordion-item {
  width: 16.6%;
}
.accordion:hover .accordion-item-content {
  margin-top: 100px;
}
.accordion-item {
  display: inline-block;
  vertical-align: top;
  box-sizing: border-box;
  width: 20%;
  height: 600px;
  border-right: 1px solid rgba(255, 255, 255, 0.5);
  white-space: normal;
  overflow: hidden;
  transition: all 0.5s ease;
}
.accordion-item:last-child {
  border-right: none;
}
.accordion-item-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  transition: all 1s ease;
  opacity: 0;
}
.accordion-item-bg::after {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: rgba(0, 102, 235, 0.5);
}
.accordion-item-bg img {
  width: 100%;
  height: 100%;
}
.accordion-item-content {
  margin: 200px 40px 0;
  box-sizing: border-box;
  color: #fff;
  font-size: 14px;
  transition: all 0.5s ease;
}
.accordion-item-content .topic {
  margin-bottom: 50px;
  height: 42px;
  transition: all 0.5s ease;
}
.accordion-item-content .topic img {
  height: 100%;
}
.accordion-item-content .topic-profile {
  margin-bottom: 30px;
  min-height: 72px;
  font-size: 24px;
  line-height: 1.5;
}
.accordion-item-content .topic-detail {
  height: 0;
  opacity: 0;
  font-size: 16px;
  line-height: 1.8;
  text-align: left;
  color: #fff;
  transition: all 0.5s ease;
}
.accordion-item-content .topic-detail.patch-en {
  font-size: 14px;
  line-height: 1.5;
}
.accordion-item-content .topic-learn-more {
  margin-top: 40px;
  height: 0;
  opacity: 0;
  cursor: pointer;
  transition: all 0.5s ease;
}
.accordion-item-content .topic-learn-more a:hover,
.accordion-item-content .topic-learn-more a:active,
.accordion-item-content .topic-learn-more a:link,
.accordion-item-content .topic-learn-more a:visited {
  color: #fff;
}
.accordion-item:hover {
  width: 33.2% !important;
}
.accordion-item:hover .accordion-item-bg {
  opacity: 1;
}
.accordion-item:hover .accordion-item-content .topic-detail {
  height: auto;
  opacity: 1;
}
.accordion-item:hover .accordion-item-content .topic-learn-more {
  height: auto;
  opacity: 1;
}
@media (max-width: 1366px) {
  .accordion:hover .accordion-item {
    width: 20%;
  }
  .accordion:hover .accordion-item-content {
    margin-top: 0.6rem;
  }
  .accordion:hover .accordion-item-content .topic {
    height: 0.42rem;
  }
  .accordion-item {
    width: 20%;
    height: 6rem;
    position: relative;
  }
  .accordion-item-bg {
    opacity: 1;
  }
  .accordion-item-bg img {
    width: unset;
  }
  .accordion-item-content {
    margin: 0.6rem 0.2rem 0;
    font-size: 0.14rem;
  }
  .accordion-item-content .topic {
    margin-bottom: 0.5rem;
    height: 0.42rem;
  }
  .accordion-item-content .topic.patch-en {
    margin-bottom: 0.2rem;
  }
  .accordion-item-content .topic-profile {
    margin-bottom: 0.3rem;
    font-size: 0.24rem;
    min-height: 0.72rem;
  }
  .accordion-item-content .topic-profile.patch-en {
    font-size: 0.2rem;
    min-height: 0.52rem;
    margin-bottom: 0.2rem;
  }
  .accordion-item-content .topic-detail {
    font-size: 0.16rem;
    height: auto;
    opacity: 1;
  }
  .accordion-item-content .topic-detail.patch-en {
    font-size: 0.14rem;
    line-height: 1.5;
    text-align: left;
  }
  .accordion-item-content .topic-learn-more {
    margin-top: 0.2rem;
    height: auto;
    opacity: 1;
  }
  .accordion-item:hover {
    width: 20% !important;
  }
  .accordion-item:hover .accordion-item-content {
    margin: 0.6rem 0.2rem 0;
  }
  .accordion-item:hover .accordion-item-content .topic {
    height: 0.42rem;
  }
  .accordion-item:hover .accordion-item-content .topic-detail {
    height: auto;
    opacity: 1;
  }
}
@media (max-width: 1000px) {
  .accordion {
    white-space: normal;
  }
  .accordion-bg {
    display: none;
  }
  .accordion:hover .accordion-item {
    width: 100%;
  }
  .accordion:hover .accordion-item-content {
    margin: 0.3rem 0.3rem 0.5rem;
  }
  .accordion:hover .accordion-item-content .topic {
    height: 0.62rem;
  }
  .accordion:hover .accordion-item-content .topic img {
    height: 0.62rem;
  }
  .accordion:hover .accordion-item-content .topic-detail {
    height: auto;
    opacity: 1;
  }
  .accordion-item {
    width: 100%;
    height: auto !important;
    position: relative;
    margin-bottom: 0.2rem;
    border: none;
  }
  .accordion-item-bg {
    opacity: 1;
  }
  .accordion-item-bg::after {
    background: rgba(0, 102, 235, 0.7);
  }
  .accordion-item-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .accordion-item-content {
    margin: 0.3rem 0.3rem 0.5rem;
    font-size: 0.24rem;
  }
  .accordion-item-content .topic {
    height: 0.62rem;
    margin-bottom: 0.22rem;
  }
  .accordion-item-content .topic-profile {
    margin-bottom: 0.2rem;
    height: auto;
    min-height: auto;
    font-size: 0.28rem;
  }
  .accordion-item-content .topic-detail {
    font-size: 0.26rem;
    line-height: 1.5;
    height: auto;
    opacity: 1;
  }
  .accordion-item-content .topic-learn-more {
    margin-top: 0.3rem;
  }
  .accordion-item:hover {
    width: 100% !important;
  }
  .accordion-item:hover .accordion-item-content {
    margin: 0.3rem 0.3rem 0.5rem;
  }
  .accordion-item:hover .accordion-item-content .topic {
    height: 0.62rem;
    margin-bottom: 0.22rem;
  }
}
.banner {
  background: url('/static/img/ai-banner-bg.jpg') no-repeat center;
  background-size: cover;
}
.banner-mask {
  background-color: rgba(0, 18, 48, 0.5);
}
.section-1 .section-content .adv-pic-wrapper {
  width: 1070px;
  margin: 0 auto;
}
.section-1 .section-content .adv-pic-wrapper img {
  width: 100%;
}
@media (max-width: 1366px) {
  .section-1 .section-content .adv-pic-wrapper {
    width: 10.7rem;
  }
}
@media (max-width: 1000px) {
  .section-1 .section-content .adv-pic-wrapper {
    width: 7rem;
  }
}
.section-2 .section-adv .adv-item {
  width: 320px;
}
.section-2 .section-adv .adv-item:nth-child(2) {
  margin-left: 115px;
  margin-right: 115px;
}
@media (max-width: 1366px) {
  .section-2 .section-adv .adv-item {
    width: 3.2rem;
  }
  .section-2 .section-adv .adv-item:nth-child(2) {
    margin-left: 1.15rem;
    margin-right: 1.15rem;
  }
}
@media (max-width: 1000px) {
  .section-2 .section-adv .adv-item:nth-child(2) {
    margin-left: 0;
    margin-right: 0;
  }
  .section-2 .section-adv .adv-item:nth-child(1) .adv-item-title.patch-en {
    width: 3.4rem;
    margin-right: -0.1rem;
    margin-left: -0.1rem;
  }
  .section-2 .section-adv .adv-item .adv-item-title.patch-en {
    height: 0.76rem;
  }
}
.section-4 .accordion:hover .accordion-item-content {
  margin-top: 100px;
}
@media (max-width: 1000px) {
  .section-4 .accordion:hover .accordion-item-content {
    margin-top: 0.3rem;
  }
}
.section-4 .accordion-item:nth-of-type(2) .accordion-item-content .topic {
  height: 30px;
}
@media (max-width: 1366px) {
  .section-4 .accordion-item {
    height: 7rem;
  }
  .section-4 .accordion-item.patch-en {
    height: 8.5rem;
  }
}