/* 公司简介 — 一比一还原玖云 Introduction.html 布局与交互 */
.bo-intro-page {
  --intro-original: #0052d9;
  --intro-txt: #181818;
  --intro-desc: #666;
  --intro-radius: 4px;
  --intro-shadow: 0 2px 12px rgba(15, 23, 42, 0.06);
  --intro-banner-h: 420px;
  --intro-max: 1440px;
  --intro-pad: max(16px, min(4vw, 64px));
  background: #fff;
  color: var(--intro-txt);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
.bo-intro-container {
  width: 100%;
  max-width: var(--intro-max);
  margin: 0 auto;
  padding: 0 var(--intro-pad);
  box-sizing: border-box;
}

/* ===== Banner ===== */
.bo-intro-banner {
  position: relative;
  height: var(--intro-banner-h);
  overflow: hidden;
  background:
    linear-gradient(105deg, rgba(7, 24, 51, 0.55) 0%, rgba(0, 82, 217, 0.35) 45%, rgba(20, 102, 237, 0.25) 100%),
    radial-gradient(ellipse 60% 80% at 78% 40%, rgba(64, 182, 255, 0.35), transparent 60%),
    linear-gradient(135deg, #0a1a38 0%, #123a8a 48%, #1a56db 100%);
  background-size: cover;
  background-position: center;
}
.bo-intro-banner::after {
  content: "";
  position: absolute;
  right: -4%;
  top: 10%;
  width: min(42vw, 520px);
  height: min(42vw, 520px);
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 40px rgba(255, 255, 255, 0.04);
  pointer-events: none;
}
.bo-intro-banner__inner {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  align-items: center;
}
.bo-intro-banner__text {
  width: min(60%, 720px);
  color: #fff;
}
.bo-intro-banner__title {
  margin: 0 0 20px;
  font-size: 44px;
  font-weight: 700;
  line-height: 1.5;
}
.bo-intro-banner__desc {
  margin: 0;
  font-size: 18px;
  font-weight: 400;
  line-height: 2;
  color: rgba(255, 255, 255, 0.92);
}
.bo-intro-banner__btns {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.bo-intro-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none !important;
  border-radius: var(--intro-radius);
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}
.bo-intro-btn span {
  display: block;
  padding: 10px 28px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 24px;
}
.bo-intro-btn--primary {
  background: linear-gradient(180deg, #0052d9, #1466ed);
  color: #fff !important;
  box-shadow: 8px 8px 20px rgba(55, 99, 170, 0.15);
}
.bo-intro-btn--primary:hover {
  transform: scale(0.97);
}
.bo-intro-btn--light {
  background: #fff;
  color: #3d485d !important;
  box-shadow: 8px 8px 20px rgba(55, 99, 170, 0.1);
}
.bo-intro-btn--light:hover {
  transform: scale(0.97);
}

/* ===== Tabs ===== */
.bo-intro-tabs {
  width: 100%;
  background: #fff;
  border-top: 1px solid #f4f4f5;
  border-bottom: 0.5px solid #e0e2e5;
  transition: box-shadow 0.25s ease;
  z-index: 50;
}
.bo-intro-tabs.is-fixed {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid #e3e3e3;
  z-index: 999;
}
.bo-intro-tabs__list {
  position: relative;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
}
.bo-intro-tabs__item {
  margin: 0 32px;
  white-space: nowrap;
  cursor: pointer;
  flex: 0 0 auto;
}
.bo-intro-tabs__item:first-child {
  margin-left: 0;
}
.bo-intro-tabs__item a {
  display: block;
  color: var(--intro-txt);
  font-size: 16px;
  font-weight: 700;
  line-height: 72px;
  text-decoration: none !important;
  transition: color 0.2s ease;
}
.bo-intro-tabs__item:hover a,
.bo-intro-tabs__item.is-active a {
  color: var(--intro-original);
}
.bo-intro-tabs__slider {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 64px;
  background: var(--intro-original);
  transition: left 0.3s ease, width 0.3s ease;
  pointer-events: none;
}

/* ===== Sections ===== */
.bo-intro-slide {
  background: #fff;
}
.bo-intro-slide--soft {
  background: #f7f9fd;
}
.bo-intro-sec-head {
  margin-bottom: 36px;
}
.bo-intro-sec-head--end {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}
.bo-intro-sec-head h2 {
  margin: 0 0 10px;
  font-size: 32px;
  font-weight: 700;
  color: var(--intro-txt);
  line-height: 1.35;
}
.bo-intro-sec-head p {
  margin: 0;
  font-size: 16px;
  color: var(--intro-desc);
  line-height: 1.7;
}

/* ===== 公司介绍 ===== */
.bo-intro-about {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  justify-content: space-between;
  padding: 60px 0 100px;
  gap: 40px;
}
.bo-intro-about__left {
  min-width: 400px;
  max-width: 400px;
}
.bo-intro-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px 20px;
  margin: 48px 0 20px;
  padding: 0;
  list-style: none;
}
.bo-intro-stats li {
  font-size: 14px;
  color: #9e9e9e;
  font-weight: 400;
}
.bo-intro-stats__num {
  display: block;
  font-size: 36px;
  margin-bottom: 8px;
  color: var(--intro-txt);
  font-weight: 600;
  line-height: 1.2;
}
.bo-intro-about__img {
  border-radius: var(--intro-radius);
  box-shadow: var(--intro-shadow);
  overflow: hidden;
}
.bo-intro-about__img img {
  display: block;
  width: 100%;
  height: 213px;
  object-fit: cover;
  border-radius: var(--intro-radius);
}
.bo-intro-about__right {
  flex: 1;
  padding: 40px;
  border: 1px solid #e6e9ec;
  box-shadow: 0 2px 7px 0 #f2f5f7;
  border-radius: 0;
  background: #fff;
}
.bo-intro-about__title {
  margin: 0 0 20px;
  font-size: 24px;
  font-weight: 700;
  color: var(--intro-txt);
}
.bo-intro-about__title::after {
  content: "";
  display: block;
  width: 30px;
  height: 3px;
  background: var(--intro-original);
  margin-top: 18px;
}
.bo-intro-about__body {
  font-size: 16px;
  font-weight: 400;
  color: var(--intro-desc);
  line-height: 32px;
  text-align: justify;
}
.bo-intro-about__body p {
  margin: 0 0 1em;
}
.bo-intro-about__body p:last-child {
  margin-bottom: 0;
}

/* ===== 公司文化 ===== */
.bo-intro-culture {
  padding: 0 0 100px;
}
.bo-intro-slide--soft .bo-intro-culture,
.bo-intro-slide--soft .bo-intro-sec-head {
  padding-top: 68px;
}
.bo-intro-culture__row {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 16px;
}
.bo-intro-culture__card {
  background: #fff;
  width: 40%;
  height: 260px;
  padding: 50px 0 50px;
  border-radius: var(--intro-radius);
  box-shadow: var(--intro-shadow);
  box-sizing: border-box;
}
.bo-intro-culture__aside {
  width: 207px;
  height: 260px;
  flex: 0 0 207px;
  background-position: 50% 50%;
  background-repeat: no-repeat;
  background-size: cover;
  border-radius: var(--intro-radius);
}
.bo-intro-culture__icon {
  height: 91px;
  width: 241px;
  max-width: 90%;
  background-repeat: no-repeat;
  background-size: contain;
  background-position: left center;
}
.bo-intro-culture__type,
.bo-intro-culture__text {
  display: block;
  color: #111f2c;
  font-size: 26px;
  margin-bottom: 15px;
  margin-left: 85px;
}
.bo-intro-culture__text {
  font-size: 20px;
  margin-bottom: 0;
}
.bo-intro-culture__value {
  background: #fff;
  height: 260px;
  margin-top: 20px;
  padding: 50px 0 60px;
  border-radius: var(--intro-radius);
  box-shadow: var(--intro-shadow);
  box-sizing: border-box;
}

/* ===== 解决方案 ===== */
.bo-intro-programme {
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding-bottom: 100px;
  gap: 10px;
}
#programme .bo-intro-sec-head {
  padding-top: 68px;
}
.bo-intro-programme__item {
  width: 168px;
  height: 328px;
  flex: 0 0 168px;
  position: relative;
  overflow: hidden;
  border-radius: var(--intro-radius);
  transition: flex 0.5s ease-in-out, width 0.5s ease-in-out, box-shadow 0.5s ease;
  cursor: pointer;
}
.bo-intro-programme__item.is-active {
  flex: 1 1 auto;
  width: auto;
}
.bo-intro-programme__item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
  transition: background 0.45s ease;
}
.bo-intro-programme__item.is-active::after {
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.12) 22.94%, #000 90.28%);
  pointer-events: none;
}
.bo-intro-programme__img {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.bo-intro-programme__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.bo-intro-programme__body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 10px;
  padding: 20px;
  z-index: 2;
}
.bo-intro-programme__title {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
}
.bo-intro-programme__desc {
  margin: 20px 0 24px;
  font-size: 16px;
  color: #fff;
  line-height: 1.6;
  display: none;
}
.bo-intro-programme__btn {
  display: none;
}
.bo-intro-programme__btn a {
  color: #fff !important;
  font-size: 16px;
  text-decoration: none !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  padding-bottom: 2px;
}
.bo-intro-programme__btn a:hover {
  border-bottom-color: #fff;
}
.bo-intro-programme__item.is-active .bo-intro-programme__desc,
.bo-intro-programme__item.is-active .bo-intro-programme__btn {
  display: block;
}

/* ===== 发展历程 ===== */
.bo-intro-course {
  display: flex;
  width: 100%;
  background: #fff;
  border-radius: var(--intro-radius);
  overflow: hidden;
  margin-bottom: 100px;
  box-shadow: var(--intro-shadow);
}
#course .bo-intro-sec-head {
  padding-top: 68px;
}
.bo-intro-course__menu {
  list-style: none;
  margin: 0;
  padding: 26px 0;
  min-width: 200px;
  max-width: 200px;
  box-shadow: rgba(50, 50, 50, 0.03) -2px 4px 6px 1px;
  background: #fff;
  z-index: 2;
}
.bo-intro-course__menu-item {
  cursor: pointer;
  position: relative;
  display: block;
  padding-left: 24px;
  height: 64px;
  line-height: 64px;
  font-size: 16px;
  font-weight: 600;
  color: #262626;
  width: calc(100% - 24px);
  box-sizing: content-box;
  transition: width 0.45s ease, background 0.25s ease, color 0.25s ease;
}
.bo-intro-course__menu-item.is-active {
  color: #fff;
  background: var(--intro-original);
  box-shadow: 0 24px 48px 0 rgba(0, 0, 0, 0.05);
  width: 196px;
  z-index: 20;
}
.bo-intro-course__menu-item.is-active::after {
  content: "";
  position: absolute;
  top: 23px;
  right: 16px;
  width: 23px;
  height: 14px;
  background: url("../img/intro/course-arrow.png") 50% no-repeat;
  background-size: cover;
}
.bo-intro-course__panels {
  flex: 1;
  position: relative;
  min-height: 348px;
  background: #f7f9fd;
}
.bo-intro-course__panel {
  display: none;
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.bo-intro-course__panel.is-active {
  display: block;
  animation: boIntroFadeIn 0.6s ease;
}
.bo-intro-course__panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.3) 50%);
  z-index: 1;
}
.bo-intro-course__panel-inner {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  color: #fff;
  padding: 40px 60px;
  max-width: 70%;
}
.bo-intro-course__panel-inner h3 {
  margin: 10px 0 0;
  font-size: 28px;
  font-weight: 700;
}
.bo-intro-course__panel-inner p {
  width: 100%;
  max-width: 36em;
  font-size: 14px;
  font-weight: 400;
  margin: 36px 0 0;
  line-height: 24px;
  color: rgba(255, 255, 255, 0.92);
}

@keyframes boIntroFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== 公司环境 ===== */
.bo-intro-env {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  padding-bottom: 100px;
  gap: 10px;
}
#environment .bo-intro-sec-head {
  padding-top: 68px;
}
.bo-intro-env__main {
  flex: 1;
  position: relative;
  overflow: hidden;
  height: 390px;
  border-radius: var(--intro-radius);
  cursor: default;
}
.bo-intro-env__side {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.bo-intro-env__item {
  width: 275px;
  height: 190px;
  position: relative;
  overflow: hidden;
  border-radius: var(--intro-radius);
}
.bo-intro-env__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
  border-radius: var(--intro-radius);
}
.bo-intro-env__item:hover .bo-intro-env__img,
.bo-intro-env__main:hover .bo-intro-env__img {
  transform: scale(1.05);
}
.bo-intro-env__main::after,
.bo-intro-env__item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.01), rgba(0, 0, 0, 0.1) 80%, rgba(0, 0, 0, 0.3) 100%);
  z-index: 1;
  border-radius: var(--intro-radius);
  pointer-events: none;
}
.bo-intro-env__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  width: 100%;
  padding: 20px;
  box-sizing: border-box;
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.58), rgba(67, 67, 67, 0.84));
}

/* fixed tabs spacer */
.bo-intro-tabs.is-fixed + .bo-intro-main {
  /* no-op: sections use scroll offset in JS */
}

@media (max-width: 1100px) {
  .bo-intro-about {
    flex-direction: column;
    align-items: stretch;
  }
  .bo-intro-about__left {
    min-width: 0;
    max-width: none;
  }
  .bo-intro-stats {
    gap: 24px 16px;
    margin-top: 24px;
  }
  .bo-intro-culture__aside {
    display: none;
  }
  .bo-intro-culture__card {
    width: 48%;
  }
  .bo-intro-programme__item {
    flex: 1 1 0;
    width: auto;
    min-width: 0;
  }
  .bo-intro-env {
    flex-direction: column;
  }
  .bo-intro-env__side {
    grid-template-columns: repeat(2, 1fr);
  }
  .bo-intro-env__item {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .bo-intro-page {
    --intro-banner-h: 260px;
  }
  .bo-intro-banner__text {
    width: 100%;
  }
  .bo-intro-banner__title {
    font-size: 28px;
    margin: 20px 0 12px;
  }
  .bo-intro-banner__desc {
    font-size: 14px;
    line-height: 1.7;
  }
  .bo-intro-tabs.is-fixed {
    top: 50px;
  }
  .bo-intro-tabs__item {
    margin: 0 16px;
  }
  .bo-intro-tabs__item a {
    font-size: 14px;
    line-height: 52px;
  }
  .bo-intro-sec-head h2 {
    font-size: 24px;
  }
  .bo-intro-about,
  .bo-intro-culture {
    padding-bottom: 48px;
  }
  .bo-intro-stats__num {
    font-size: 28px;
  }
  .bo-intro-about__right {
    padding: 20px;
  }
  .bo-intro-about__title {
    font-size: 20px;
  }
  .bo-intro-about__body {
    font-size: 14px;
    line-height: 24px;
  }
  .bo-intro-culture__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .bo-intro-culture__card {
    width: 100%;
    height: 180px;
    padding-top: 30px;
  }
  .bo-intro-culture__type {
    font-size: 18px;
    margin-left: 12px;
  }
  .bo-intro-culture__text {
    font-size: 14px;
    margin-left: 12px;
  }
  .bo-intro-culture__icon {
    height: 60px;
    width: 80%;
  }
  .bo-intro-culture__value {
    height: auto;
    padding: 30px 12px 30px;
  }
  .bo-intro-programme {
    flex-direction: column;
    padding-bottom: 48px;
  }
  .bo-intro-programme__item,
  .bo-intro-programme__item.is-active {
    width: 100%;
    flex: none;
    height: 220px;
  }
  .bo-intro-programme__desc,
  .bo-intro-programme__btn {
    display: block !important;
  }
  .bo-intro-course {
    flex-direction: column;
    margin-bottom: 48px;
  }
  .bo-intro-course__menu {
    max-width: none;
    min-width: 0;
    display: flex;
    overflow-x: auto;
    padding: 0;
  }
  .bo-intro-course__menu-item,
  .bo-intro-course__menu-item.is-active {
    width: auto;
    padding: 0 16px;
    height: 48px;
    line-height: 48px;
    font-size: 14px;
    white-space: nowrap;
  }
  .bo-intro-course__menu-item.is-active::after {
    display: none;
  }
  .bo-intro-course__panels {
    min-height: 260px;
  }
  .bo-intro-course__panel-inner {
    padding: 24px;
    max-width: 100%;
  }
  .bo-intro-course__panel-inner h3 {
    font-size: 20px;
  }
  .bo-intro-env__main {
    height: 220px;
  }
  .bo-intro-env {
    padding-bottom: 48px;
  }
}