.main-content {
  background-color: #fff;
  position: relative;
}

.main-content-tabs {
  display: flex;
  gap: 20px;
  height: 72px;
  width: 100%;
  padding: 20px 0 30px 0px;
  background-color: #fff;
  position: absolute;
  top: -72px;
  z-index: 2000;
}

.tab-indicator {
  position: absolute;
  bottom: 13px;
  height: 4px;
  background: #8bcce5;
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0;
}

.tab-item {
  font-weight: 400;
  font-size: 16px;
  color: #666;
  height: 40px;
  padding: 0px 10px;
  line-height: 40px;
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
  background: #fff;
}

.tab-item.active {
  color: #000;
}

/* 固定状态 */
.main-content-tabs.fixed {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 2000;
}

/* 隐藏状态 */
.main-content-tabs.hide {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.tab-contents {
  margin-top: 80px;
}
/* 内容区块定位 */
.tab-content {
  /* padding: 0px 0px 5px 0px; */
  background-color: #fff;
  scroll-margin-top: 72px; /* 根据headeré«Ü度调整 */
}

.tab-title {
  font-size: 30px;
  font-weight: 600;
  color: #333333;
  margin-bottom: 20px;
  margin-top: 49px;
}

.tab-title::after {
  width: 25px;
  margin: 20px 0 0;
  display: block;
  content: "";
  box-sizing: border-box;
  height: 3px;
  background-color: #8bcce5;
}

.about-content {
  display: grid;
  grid-template-columns: 480px 1fr;
  margin-bottom: 80px;
}

.company-name {
  font-size: 42px;
  margin-bottom: 50px;
  color: #444;
  line-height: 1;
  font-weight: 700;
  position: relative;
}

.company-name::after {
  background-color: #8bcce5;
  content: "";
  display: inline-block;
  width: 30px;
  height: 3px;
  margin: 0 0 0 36px;
}

.company-content {
  font-size: 16px;
  font-weight: 400;
  color: #333333;
  line-height: 30px;
}
.company-content p{font-size:20px;text-indent: 2em;line-height: 35px;}

.company-video {
  overflow: hidden;
}
.company-video:hover img {
  transform: scale(1.05);
}

.company-video img {
  width: 100%;
  height: 100%;
  transform: scale(1);
  transition: all 300ms ease;
}

.company-video::before {
  content: "";
  display: block;
  z-index: 1;
  width: 94px;
  height: 94px;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  background: url(./images/play.png) no-repeat center center;
  background-size: contain;
}

.top-placeholder {
  height: 300px;
}

.image-container {
  padding: 0 70px 0 30px;
  display: flex;
  align-items: center;
  width: 300px;
}
 .image-container img {width:350px}
.image-group {
  text-align: center;
  padding-top: 10px;
}
.image-group img {
  margin-bottom: 160px;
}
.image-group img:last-child {
  margin-bottom: 0px;
  width: 100%;
}
.swiper-company-container {
  height: 350px;
  overflow: visible;
  height: auto;
  margin-top: 72px;
  overflow: hidden;
}
.swiper-company-container .swiper-wrapper {
  height: 390px;
  display: flex;
}
.swiper-company-container .swiper-wrapper .swiper-slide {
  height: 100%;
  width: 100%;
}

.swiper-slide .card {
  transition: all 300ms ease;
  transform: scale(0.75);
  transform-origin: bottom center;
  color: #1f1f1f;
  text-align: center;
}

.swiper-slide:nth-child(2) .card {
  transform: scale(1) !important;
}

.swiper-slide .card img {
  width: 100%;
  height: auto;
}

.swiper-slide .card-content {
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.swiper-slide .card-content > div:nth-child(2) {
  font-size: 60px;
  font-family: bb;
  font-weight: bold;
  color: #d83535;
  line-height: 1.2;
  margin: 0 auto;
  margin-top: 15px;
  width: 80%;
}

.swiper-slide .card-content > div:nth-child(3) {
  font-size: 30px;
  line-height: 1.5;
  margin: 0 auto;
  margin-top: 8px;
  width: 80%;
}
.swiper-tool {
  display: flex;
  font-size: 16px;
  justify-content: space-between;
}
.swiper-tool {
  font-size: 26px;
}
.page-info {
  display: flex;
  align-items: end;
  font-size: 16px;
  color: #999;
}

.page-number {
  font-size: 26px;
  color: #1f1f1f;
}
.page-arrow {
  display: flex;
}
.page-arrow div {
  width: 40px;
  height: 40px;
  margin-left: 25px;
  background-color: #999;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.history-card-list {
  flex: 1;
  overflow-x: scroll;
  scroll-behavior: smooth;
  display: flex;
  align-items: center;
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.history-card-line {
  height: 700px;
}
.history-card-line::after {
  content: "";
  display: block;
  width: 100%;
  height: 1px;
  background-color: #66666693;
  position: inherit;
  top: 260px;
  z-index: 1;
}

.history-card {
  width: 260px;
  height: 520px;
  color: #000;
  position: relative;
}

.history-card > div {
  width: 260px;
  height: 260px;
}

.history-card:after {
  content: "";
  display: block;
  width: 16px;
  height: 16px;
  border: 2px solid #8bcce5;
  border-radius: 16px;
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  z-index: 2;
}
.history-card:before {
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  background-color: #8bcce5;
  border-radius: 6px;
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  margin: auto;
  z-index: 2;
}

.history-point-info .start {
  font-size: 46px;
  padding-top: 50px;
  font-weight: 500;
}

.history-point-info .start > div:nth-child(2) {
  color: #8bcce5;
  margin-top: 15px;
}

.history-info .tour {
  padding-top: 30px;
}

.history-info .tour > div:nth-child(1) span {
  color: #1f1f1f;
  font-size: 42px;
}

.history-info .tour > div:nth-child(1) {
  font-size: 32px;
  line-height: 30px;
}

.history-info .tour > div:nth-child(2) {
  font-size: 24px;
  line-height: 30px;
  padding-top: 20px;
}

.history-point-info .tour {
  padding-top: 30px;
}

.history-point-info .tour > div:nth-child(1) span {
  color: #1f1f1f;
  font-size: 42px;
}

.history-point-info .tour > div:nth-child(1) {
  font-size: 32px;
  line-height: 30px;
}

.history-point-info .tour > div:nth-child(2) {
  font-size: 24px;
  line-height: 30px;
  padding-top: 20px;
}

.years-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 50px;
}

.years {
  display: flex;
  margin-top: 120px;
}

.year-area {
  color: #1f1f1f;
  font-size: 20px;
  margin: 0px 16px;
  text-align: center;
}

.year-area.active {
  color: #8bcce5;
}

.year-area.active::after {
  content: "";
  display: block;
  width: 30px;
  height: 4px;
  background-color: #8bcce5;
  margin: 10px auto;
}

.divs-container {
  display: flex;
  width: 100%;
  height: 750px; /* 固定é«Ü度 */
  gap: 0; /* 无间隙，确保总宽 100% */
}
.div-item {
  flex: 1; /* åƝ始平均宽度 20% */
  background-position: center center;
  background-size: cover;
  height: 100%;
  color: white;
  font-size: 18px;
  transition: width 0.3s ease-in-out; /* 平滑动画 */
  cursor: pointer;
}

.item-bg {
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(211, 36, 48, 0);
  transition: background-color 300ms ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.div-item:hover .item-bg {
  background-color: rgba(139, 204, 229, 0.8);
}

.div-item {
  width: 20%;
  transition: width 0.3s ease-in-out; /* 平滑动画 */
}

.div-item:hover {
  width: 26%; /* 悬停åÜ宽 */
}
/* 其他 div åÜ窄：当有 hover 时，剩余 74% 平均åƆ配 */
.divs-container:hover .div-item:not(:hover) {
  flex: none; /* 禁用 flex 拉伸 */
  width: calc((100% - 26%) / 4); /* 74% / 4 â‰Æ 18.5% */
}

.div-item-line {
  width: 30px;
  height: 3px;
  background-color: #fff;
  margin: 20px auto;
}
.div-item-title {
  font-size: 32px;
}
.div-item-content {
  height: 240px;
  width: 340px;
  font-size: 24px;
  line-height: 28px;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
  margin-top: 50px;
  font-family:
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    Helvetica, sans-serif;
}
.div-item:hover .div-item-content {
  opacity: 1;
}
.div-item-bottom {
  width: 100%;
  font-size: 34px;
  font-weight: 400;
  padding: 0 15%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
}
.div-item-bottom img {
  width: 34px;
}

.history-card-list {
  padding-left: 0px;
}

/* 响应式断点 */
@media (min-width: 1600px) {
  .full-width {
    position: absolute;
    left: -200px;
    width: 100vw;
    margin-top: 30px;
  }
  .history-card-list {
    padding-left: 200px;
  }
}
@media (min-width: 1500px) and (max-width: 1599px) {
  .full-width {
    position: absolute;
    left: -150px;
    width: 100vw;
  }
  .history-card-list {
    padding-left: 150px;
  }
}
@media (min-width: 1400px) and (max-width: 1499px) {
  .full-width {
    position: absolute;
    left: -115px;
    width: 100vw;
  }

  .history-card-list {
    padding-left: 115px;
  }
}
@media (min-width: 1200px) and (max-width: 1399px) {
  .full-width {
    position: absolute;
    left: -30px;
    width: 100vw;
  }

  .history-card-list {
    padding-left: 30px;
  }
}
@media (min-width: 900px) and (max-width: 1199px) {
  .full-width {
    position: absolute;
    left: -30px;
    width: 100vw;
  }

  .history-card-list {
    padding-left: 30px;
  }
}

@media (max-width: 900px) {
  .full-width {
    position: absolute;
    left: -20px;
    width: 100vw;
  }
  .swiper-tool {
    display: none;
  }
  .history-card-list {
    padding-left: 20px;
  }
}

@media (max-width: 768px) {
  .swiper-tool {
    display: none;
  }
  .main-content-tabs {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(3, 1fr);
  }

  .main-content-tabs .tab-item {
    width: 100%;
    height: 40px;
    line-height: 40px !important;
    padding: 0px 9px;
  }

  .tab-item {
    padding: 8px 15px;
    font-size: 14px;
  }

  .main-content-tabs.fixed {
    top: 72px;
  }
  .main-content-tabs {
    display: flex;
    overflow: auto hidden;
    width: 100%;
    white-space: nowrap;
    left: 0px;
    padding: 20px 10px 30px 10px;
    box-shadow: 1px 2px 2px #f1f1f1;
  }
  .tab-contents {
    margin-top: 90px;
  }
  .tab-content {
    padding: 72px 0px 0px 0px;
  }
}