:root {
  --blue: #1a8cff;
  --blue-mid: #0b6fd4;
  --blue-dark: #074a96;
  --blue-soft: #e8f4ff;
  --ink: #0d3a66;
  --muted: #4a6d8c;
  --line: #d4e8f8;
  --bg: #fff;
  --bg-gray: #f3f8ff;
  --footer: #6a8aaa;
  --header-h: 72px;
  --max: 1200px;
  --font: "Open Sans", "Segoe UI", sans-serif;
  --font-head: "Montserrat", "Open Sans", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

/* ========== Header / dropdown (EN-style) ========== */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  background: rgba(7, 74, 150, 0.42);
  backdrop-filter: blur(8px);
  transition: background 0.25s;
}

.site-header.is-solid,
.site-header.theme-light {
  background: #fff;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.1em;
  color: #fff;
  flex-shrink: 0;
  line-height: 1.15;
}

.site-header.is-solid .logo,
.site-header.theme-light .logo {
  color: var(--blue);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: #fff;
}

.site-header.is-solid .nav-toggle span,
.site-header.theme-light .nav-toggle span {
  background: var(--ink);
}

.site-nav {
  display: flex;
  align-items: stretch;
  height: 100%;
  gap: 0;
}

.nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 16px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.95);
  white-space: nowrap;
}

.site-header.is-solid .nav-link,
.site-header.theme-light .nav-link {
  color: var(--ink);
}

.nav-link:hover,
.nav-item.is-open > .nav-link,
.nav-link.is-active {
  color: #fff;
}

.site-header.is-solid .nav-link:hover,
.site-header.is-solid .nav-item.is-open > .nav-link,
.site-header.is-solid .nav-link.is-active,
.site-header.theme-light .nav-link:hover,
.site-header.theme-light .nav-item.is-open > .nav-link,
.site-header.theme-light .nav-link.is-active {
  color: var(--blue);
}

.nav-caret {
  margin-left: 5px;
  font-size: 10px;
  opacity: 0.8;
}

.subnav {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  padding: 8px 0;
  background: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  z-index: 20;
}

.nav-item:hover > .subnav,
.nav-item.is-open > .subnav {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.subnav a {
  display: block;
  padding: 10px 18px;
  font-size: 13px;
  color: var(--ink);
  line-height: 1.4;
}

.subnav a:hover {
  background: var(--blue-soft);
  color: var(--blue);
}

/* ========== Banner carousel ========== */
.banner {
  position: relative;
  height: min(78vh, 640px);
  min-height: 420px;
  overflow: hidden;
  background: #074a96;
}

.banner-track {
  display: flex;
  height: 100%;
  transition: transform 0.6s ease;
}

.banner-slide {
  position: relative;
  flex: 0 0 100%;
  height: 100%;
}

.banner-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 74, 150, 0.78) 0%, rgba(11, 111, 212, 0.48) 55%, rgba(26, 140, 255, 0.22) 100%);
}

.banner-copy {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  transform: translateY(-46%);
  z-index: 2;
  color: #fff;
}

.banner-copy .brand {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: 0.18em;
}

.banner-copy .rule {
  width: 56px;
  height: 3px;
  background: #fff;
  margin-bottom: 18px;
}

.banner-copy p {
  margin: 0 0 22px;
  max-width: 640px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.92);
}

.banner-btn {
  display: inline-block;
  padding: 10px 22px;
  border: 1px solid #fff;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.banner-btn:hover {
  background: #fff;
  color: var(--blue-dark);
}

.banner-arrow {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 44px;
  height: 44px;
  margin-top: -22px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: rgba(0, 0, 0, 0.2);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
}

.banner-arrow:hover {
  background: rgba(26, 79, 156, 0.85);
  border-color: transparent;
}

.banner-arrow.prev {
  left: 18px;
}

.banner-arrow.next {
  right: 18px;
}

.banner-dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 22px;
  z-index: 3;
  display: flex;
  justify-content: center;
  gap: 8px;
}

.banner-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 0;
  padding: 0;
  background: rgba(255, 255, 255, 0.45);
  cursor: pointer;
}

.banner-dots button.is-active {
  background: #fff;
}

/* ========== Page sections ========== */
.home-intro {
  padding: 56px 0 20px;
  background: #fff;
}

.home-intro h1 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 28px;
  letter-spacing: 0.12em;
  text-align: center;
  color: var(--blue-dark);
}

.home-intro .divider {
  width: 60px;
  height: 2px;
  margin: 0 auto 22px;
  background: var(--blue);
}

.home-intro .lead {
  max-width: 900px;
  margin: 0 auto 20px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

.center-link {
  display: block;
  text-align: center;
  color: var(--blue);
  font-weight: 600;
}

.center-link:hover {
  text-decoration: underline;
}

.section-block {
  padding: 48px 0 56px;
}

.section-block.alt {
  background: var(--bg-gray);
}

.section-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--blue);
}

.section-title-row h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
}

.section-title-row .more {
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
}

.section-title-row .more:hover {
  text-decoration: underline;
}

/* Tech carousel */
.tech-carousel {
  position: relative;
}

.tech-viewport {
  overflow: hidden;
}

.tech-track {
  display: flex;
  gap: 20px;
  transition: transform 0.45s ease;
}

.tech-card {
  flex: 0 0 calc((100% - 40px) / 3);
  background: #fff;
  border: 1px solid var(--line);
  min-width: 0;
}

.tech-card a {
  display: block;
  height: 100%;
}

.tech-card .pic {
  aspect-ratio: 16 / 11;
  overflow: hidden;
  background: #ddd;
}

.tech-card .pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s;
}

.tech-card:hover .pic img {
  transform: scale(1.05);
}

.tech-card h3 {
  margin: 14px 14px 8px;
  font-size: 15px;
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.tech-card p {
  margin: 0 14px 16px;
  font-size: 13px;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.carousel-btn {
  position: absolute;
  top: 38%;
  z-index: 2;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--blue);
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.carousel-btn:hover {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}

.carousel-btn.prev {
  left: -8px;
}

.carousel-btn.next {
  right: -8px;
}

/* News grid */
.news-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.news-card {
  background: #fff;
  border: 1px solid var(--line);
  transition: box-shadow 0.3s ease;
}

.news-card:hover {
  box-shadow: 0 8px 22px rgba(34, 34, 34, 0.08);
}

.news-card a {
  display: block;
  padding: 8px 0 4px;
}

.news-card:not(:has(.pic)) {
  padding-top: 8px;
}

.news-card .pic {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #ddd;
}

.news-card .pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-card time {
  display: block;
  margin: 12px 12px 4px;
  font-size: 12px;
  color: var(--blue);
  font-weight: 600;
}

.news-card h3 {
  margin: 0 12px 14px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

/* Inner pages */
.page-banner {
  padding: calc(var(--header-h) + 48px) 0 48px;
  background: linear-gradient(120deg, #074a96, #1a8cff);
  color: #fff;
}

.page-banner h1 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 32px;
  font-weight: 700;
}

.page-banner .crumb {
  font-size: 13px;
  opacity: 0.85;
}

.page-banner .crumb a:hover {
  text-decoration: underline;
}

.page-main {
  padding: 40px 0 64px;
}

.page-main h2 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 22px;
  color: var(--blue-dark);
}

.page-main p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
}

.content-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

.side-menu {
  border: 1px solid var(--line);
  background: #fff;
}

.side-menu .side-title {
  padding: 14px 16px;
  background: var(--blue);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
}

.side-menu a {
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink);
}

.side-menu a:hover,
.side-menu a.is-active {
  background: var(--blue-soft);
  color: var(--blue);
  font-weight: 600;
}

.content-panel {
  min-width: 0;
}

.content-panel .lead-img {
  margin: 0 0 20px;
  border: 1px solid var(--line);
}

.content-panel .lead-img img {
  width: 100%;
  max-height: 360px;
  object-fit: cover;
}

.tech-detail {
  scroll-margin-top: calc(var(--header-h) + 16px);
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.tech-detail:first-of-type {
  padding-top: 0;
}

.tech-detail-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

.tech-detail h2 {
  margin-top: 0;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.case-card {
  border: 1px solid var(--line);
  background: #fff;
}

.case-card .pic {
  aspect-ratio: 16 / 11;
  overflow: hidden;
}

.case-card .pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-card h3 {
  margin: 12px 14px 14px;
  font-size: 14px;
  font-weight: 600;
}

.contact-table {
  width: 100%;
  max-width: 720px;
  border-collapse: collapse;
}

.contact-table th,
.contact-table td {
  padding: 14px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.contact-table th {
  width: 140px;
  color: var(--blue);
  font-weight: 700;
  font-size: 13px;
}

.contact-table td {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.contact-table a:hover {
  color: var(--blue);
}

.news-list {
  display: grid;
  gap: 16px;
}

.news-list-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  background: #fff;
}

.news-list-item .pic {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #ddd;
}

.news-list-item .pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-list-item time {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--blue);
  font-weight: 600;
}

.news-list-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-family: var(--font-head);
}

.news-list-item p {
  margin: 0;
}

/* Footer */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--line);
  padding: 28px 0 32px;
  text-align: center;
  color: var(--footer);
  font-size: 13px;
}

.site-footer .company {
  margin: 0 0 8px;
  color: var(--ink);
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.site-footer p {
  margin: 0 0 6px;
}

.site-footer a:hover {
  color: var(--blue);
}

@media (max-width: 1100px) {
  .tech-card {
    flex-basis: calc((100% - 20px) / 2);
  }

  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    height: auto;
    background: #fff;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    max-height: calc(100vh - var(--header-h));
    overflow: auto;
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-item {
    display: block;
    height: auto;
    border-bottom: 1px solid var(--line);
  }

  .nav-link {
    width: 100%;
    height: auto;
    padding: 14px 18px;
    color: var(--ink) !important;
    justify-content: space-between;
  }

  .subnav {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    display: none;
    background: var(--bg-gray);
    min-width: 0;
  }

  .nav-item.is-open > .subnav {
    display: block;
  }

  .banner {
    min-height: 360px;
    height: 56vh;
  }

  .banner-arrow {
    display: none;
  }

  .tech-card {
    flex-basis: 100%;
  }

  .carousel-btn {
    top: auto;
    bottom: -48px;
  }

  .carousel-btn.prev {
    left: calc(50% - 48px);
  }

  .carousel-btn.next {
    right: calc(50% - 48px);
  }

  .tech-carousel {
    padding-bottom: 56px;
  }

  .news-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .tech-detail-grid,
  .news-list-item,
  .team-card,
  .split-feature {
    grid-template-columns: 1fr;
  }

  .stats-grid,
  .honor-grid,
  .culture-grid {
    grid-template-columns: 1fr 1fr;
  }

  .timeline {
    padding-left: 18px;
  }
}

/* ========== Horizon extras ========== */
.about-links {
  margin: 8px 0 16px;
  padding-left: 1.2em;
  list-style: disc;
}

.about-links li {
  margin: 0 0 8px;
  color: var(--muted);
}

.page-banner.photo {
  position: relative;
  background-size: cover;
  background-position: center;
}

.page-banner.photo::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(7, 74, 150, 0.84), rgba(26, 140, 255, 0.52));
}

.page-banner .container {
  position: relative;
  z-index: 1;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  background: linear-gradient(160deg, #1a8cff, #074a96);
  color: #fff;
  padding: 28px 16px;
  text-align: center;
}

.stat-card strong {
  display: block;
  font-family: var(--font-head);
  font-size: 34px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.stat-card span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  opacity: 0.92;
}

.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.content-panel .culture-grid {
  grid-template-columns: 1fr 1fr;
}

.culture-card {
  border: 1px solid var(--line);
  background: var(--blue-soft);
  padding: 22px 18px;
}

.culture-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-mid);
}

.culture-card p {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
}

.team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.team-card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  align-items: start;
  border: 1px solid var(--line);
  background: #fff;
  padding: 16px;
}

.team-card .pic {
  background: #0c1828;
  overflow: hidden;
}

.team-card .pic img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  object-position: top;
}

.team-card h3 {
  margin: 0 0 4px;
  font-family: var(--font-head);
  font-size: 16px;
  color: var(--ink);
}

.team-card .role {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.team-card p {
  margin: 0;
  font-size: 13px;
}

.honor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.honor-card {
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
}

.honor-card img {
  width: 100%;
  height: 180px;
  object-fit: contain;
  background: #f7fbff;
  padding: 10px;
}

.honor-card p {
  margin: 0;
  padding: 10px 12px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.timeline {
  margin: 8px 0 0;
  padding-left: 22px;
  border-left: 3px solid var(--blue);
}

.timeline li {
  margin: 0 0 18px;
  color: var(--muted);
}

.timeline strong {
  display: block;
  margin-bottom: 4px;
  color: var(--blue-dark);
  font-family: var(--font-head);
}

.split-feature {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: center;
  margin: 0 0 36px;
}

.split-feature.reverse {
  grid-template-columns: 0.95fr 1.05fr;
}

.split-feature.reverse .copy {
  order: -1;
}

.split-feature .pic {
  overflow: hidden;
  border: 1px solid var(--line);
  background: #ddd;
}

.split-feature .pic img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
}

.kpi-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 16px;
}

.kpi-row div {
  min-width: 140px;
}

.kpi-row strong {
  display: block;
  color: var(--blue);
  font-family: var(--font-head);
  font-size: 20px;
}

.kpi-row span {
  font-size: 12px;
  color: var(--muted);
}

.news-card .pic + time {
  margin-top: 12px;
}

@media (max-width: 700px) {
  .stats-grid,
  .honor-grid,
  .culture-grid {
    grid-template-columns: 1fr;
  }

  .split-feature.reverse .copy {
    order: 0;
  }
}