@charset "UTF-8";
html,
body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
code,
form,
fieldset,
legend,
input,
button,
textarea,
p,
blockquote,
th,
td {
  font-family: "Hiragino Sans GB", "Hiragino Sans GB W3", "Microsoft YaHei", Arial, Helvetica, sans-serif;
  font-size: "12px";
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 62.5%;
}

.container-fluid {
  padding-left: 0px;
  padding-right: 0px;
}

.db {
  display: block;
  width: 100%;
}

/* 
    箭头
    @include arrow(direction,size,color);
**/
/*
    超出省略号
    @include ell();
 * */
/*
    inline-block
    @include inline_block();
 * */
/*
    font-size of REM
    @include font_size(fz);
 * */
.about_1__body {
  background: url(../images/aboutus/img_1.jpg) top center no-repeat;
  background-size: cover;
  padding-bottom: 480px;
}

.about_1__body .txt_section {
  align-items: center;
  justify-content: space-between;
  margin-top: 40px;
}

.about_1__body .txt_section .left_con {
  width: 50%;
}

.about_1__body .txt_section .left_con p {
  color: #333;
  line-height: 2;
}

.about_1__body .txt_section .right_con {
  width: 40%;
}

.about_1__body .txt_section .right_con ul {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  row-gap: 80px;
  column-gap: 10%;
}

.about_1__body .txt_section .right_con ul h6 {
  margin-bottom: 20px;
}

.about_1__body .txt_section .right_con ul h6 img {
  height: 50px;
}

.about_1__body .txt_section .right_con ul h3 {
  color: var(--color-org);
  font-size: 56px;
  font-size: 5.6rem;
}

.about_1__body .txt_section .right_con ul p {
  font-size: 16px;
  font-size: 1.6rem;
  line-height: 1.5;
}

.about_2__body {
  background: url(../images/aboutus/img_2.jpg) center top no-repeat;
  padding: 280px 0;
}

.core_list {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
}

.core_list li {
  text-align: center;
  color: #fff;
}

.core_list li:hover i {
  background-color: var(--color-org);
  border-color: var(--color-org);
}

.core_list li h3 {
  font-size: 56px;
  font-size: 5.6rem;
  font-weight: 700;
}

.core_list li h4 {
  font-size: 24px;
  font-size: 2.4rem;
  margin-bottom: 40px;
}

.core_list li p {
  font-size: 20px;
  font-size: 2rem;
}

.core_list li h6 {
  margin-top: 20px;
}

.core_list li h6 i {
  display: inline-block;
  border-radius: 50%;
  text-align: center;
  width: 50px;
  height: 50px;
  line-height: 50px;
  border: 1px solid #fff;
  color: #fff;
  font-size: 20px;
  transition: all .3s;
}

.about_3__body {
  background: #ECF3FC url(../images/index/ser_bg.jpg) center bottom no-repeat;
  background-size: cover;
  padding: 80px 0 120px;
}

.about_4__body {
  background: url(../images/aboutus/img_3.jpg) center bottom no-repeat;
  background-size: 100% 100%;
  padding: 100px 0;
}

.contact_grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 30px;
  margin-top: 60px;
}

/* 主容器 */
.timeline-wrapper {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 1;
  overflow: hidden;
}

/* 卡片轮播区域 */
.card-swiper {
  width: 100%;
  padding: 20px 0 40px;
  overflow: visible !important;
}

.card-swiper .swiper-slide {
  width: 100%;
  display: flex;
  justify-content: center;
  transition: all 0.4s ease;
  opacity: 0.5;
  transform: scale(0.92);
}

.card-swiper .swiper-slide-active {
  opacity: 1;
  transform: scale(1);
}

/* 卡片主体 */
.card {
  width: 300px;
  background: #fff;
  border-radius: 28px;
  box-shadow: 0 20px 50px -12px rgba(0, 30, 80, 0.15);
  overflow: hidden;
  padding: 20px 10px 10px;
  transition: box-shadow 0.3s;
  position: relative;
  margin: 0 10px;
}

.swiper-slide-active .card {
  box-shadow: 0 30px 60px -12px rgba(0, 80, 200, 0.25);
}

/* 年份 */
.card-year {
  font-size: 26px;
  font-weight: 700;
  color: #f97316;
  letter-spacing: 0.5px;
}

/* 描述文字 */
.card-desc {
  font-size: 18px;
  color: #1e293b;
  font-weight: 500;
  margin-bottom: 40px;
  letter-spacing: 0.3px;
}

/* 图片容器 */
.card-img {
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  background: #f1f5f9;
  margin-bottom: 0;
  position: relative;
  aspect-ratio: 16 / 10;
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s;
}

.swiper-slide-active .card-img img {
  transform: scale(1.02);
}

/* 背景大字年份（装饰） */
.card-bg-year {
  position: absolute !important;
  top: 80px;
  right: -30px;
  font-size: 80px;
  font-weight: 800;
  color: rgba(200, 215, 235, 0.35);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

/* 卡片内容层级 */
.card > * {
  position: relative;
  z-index: 1;
}

/* ========== 时间轴区域（带左右滚动按钮） ========== */
.timeline-container {
  width: 100%;
  position: relative;
  padding: 0 80px;
  margin-top: -10px;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 时间轴整体包裹（含左右按钮） */
.timeline-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 900px;
  gap: 16px;
}

/* 时间轴小箭头按钮（左右滚动年份） */
.timeline-nav-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #475569;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s;
  z-index: 5;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.timeline-nav-btn:hover {
  background: #2563eb;
  border-color: #2563eb;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.timeline-nav-btn:disabled,
.timeline-nav-btn.disabled {
  opacity: 0.3;
  pointer-events: none;
  cursor: default;
}

.timeline-nav-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 时间轴滚动视窗：宽度 = 3个节点 + 间距 */
.timeline-viewport {
  position: relative;
  flex: 1;
  overflow: hidden;
  padding: 10px 0;
}

/* 时间轴滚动轨道（可滚动） */
.timeline-scroll {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-behavior: smooth;
  padding: 10px 0;
}

.timeline-scroll::-webkit-scrollbar {
  display: none;
}

/* 年份节点轨道（内容） */
.timeline-track {
  position: relative;
  display: flex;
  align-items: center;
  width: max-content;
  gap: 40px;
  padding: 20px 0 14px;
}

/* 虚线连接线 */
.timeline-track::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background-image: linear-gradient(to right, #b0c4de 50%, transparent 50%);
  background-size: 16px 2px;
  background-repeat: repeat-x;
  transform: translateY(-50%);
  z-index: 0;
  pointer-events: none;
}

/* 年份节点 */
.timeline-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  z-index: 2;
  transition: transform 0.3s;
  flex-shrink: 0;
}

.timeline-node:hover {
  transform: scale(1.06);
}

/* 圆形年份 */
.node-year {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: #ffffff;
  color: #1e293b;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 17px;
  font-weight: 600;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  border: 2px solid transparent;
  white-space: nowrap;
}

/* 激活状态 */
.timeline-node.active .node-year {
  background: #2563eb;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.5);
}

/* 连接竖线 */
.node-stem {
  width: 2px;
  height: 24px;
  background: #e2e8f0;
  margin-bottom: -4px;
  transition: background 0.3s;
}

.timeline-node.active .node-stem {
  background: #f97316;
}

/* 主卡片左右箭头按钮 */
.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #0a1e3c;
  color: #0a1e3c;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s;
  z-index: 10;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.nav-btn:hover {
  background: #0a1e3c;
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(10, 30, 60, 0.25);
}

.nav-btn.swiper-button-disabled {
  opacity: 0.3;
  pointer-events: none;
}

.nav-btn-prev {
  left: 20px;
}

.nav-btn-next {
  right: 20px;
}

.nav-btn svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 响应式调整 */
@media (max-width: 1024px) {
  .timeline-wrap {
    max-width: 720px;
  }
  .node-year {
    width: 62px;
    height: 62px;
    font-size: 15px;
  }
  .timeline-track {
    gap: 32px;
  }
  .timeline-nav-btn {
    width: 36px;
    height: 36px;
  }
}

@media (max-width: 768px) {
  .card-swiper .swiper-slide {
    width: 70%;
  }
  .card {
    padding: 10px;
    border-radius: 10px;
    margin: 0 5px;
  }
  .card-year {
    font-size: 22px;
  }
  .card-desc {
    font-size: 16px;
    margin-bottom: 18px;
  }
  .card-bg-year {
    font-size: 56px;
    top: 10px;
    right: 14px;
  }
  .timeline-container {
    padding: 0 30px;
  }
  .timeline-wrap {
    max-width: 560px;
    gap: 10px;
  }
  .timeline-track {
    gap: 24px;
    padding: 16px 0 10px;
  }
  .node-year {
    width: 54px;
    height: 54px;
    font-size: 13px;
  }
  .node-stem {
    height: 18px;
  }
  .nav-btn {
    width: 44px;
    height: 44px;
  }
  .nav-btn-prev {
    left: 6px;
  }
  .nav-btn-next {
    right: 6px;
  }
  .timeline-nav-btn {
    width: 34px;
    height: 34px;
  }
  .timeline-nav-btn svg {
    width: 15px;
    height: 15px;
  }
}

@media (max-width: 560px) {
  .card-swiper .swiper-slide {
    width: 260px;
  }
  .timeline-container {
    padding: 0 16px;
  }
  .timeline-wrap {
    max-width: 400px;
    gap: 8px;
  }
  .node-year {
    width: 46px;
    height: 46px;
    font-size: 11px;
  }
  .node-stem {
    height: 14px;
  }
  .timeline-track {
    gap: 20px;
    padding: 14px 0 6px;
  }
  .timeline-nav-btn {
    width: 30px;
    height: 30px;
  }
  .timeline-nav-btn svg {
    width: 13px;
    height: 13px;
  }
}