:root {
  --bg: #0b1220;
  --panel: #111b2d;
  --panel-soft: #17243a;
  --text: #eaf0ff;
  --muted: #9fb0cb;
  --line: rgba(255, 255, 255, 0.08);
  --brand: #38bdf8;
  --brand-2: #3b82f6;
  --accent: #22c55e;
  --warm: #f59e0b;
  --surface: #f6f8fb;
  --surface-2: #ffffff;
  --text-dark: #172033;
  --muted-dark: #5f6d86;
  --shadow: 0 18px 48px rgba(9, 19, 38, 0.12);
  --radius: 8px;
  --container: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: var(--surface);
  color: var(--text-dark);
  line-height: 1.7;
}

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

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

button {
  font: inherit;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.site-shell {
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(11, 18, 32, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.site-header-inner,
.site-topbar-inner,
.hero-grid,
.feature-grid,
.matrix-grid,
.stats-grid,
.showcase-grid,
.partner-grid,
.cards-grid,
.news-grid,
.detail-grid,
.footer-grid,
.contact-grid {
  display: grid;
  gap: 24px;
}

.site-topbar {
  background: #08101d;
  color: var(--muted);
  font-size: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.site-topbar-inner {
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 40px;
}

.site-header-inner {
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 112px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
}

.logo-title {
  display: inline-flex;
  align-items: center;
  font-size: 32px;
  line-height: 1;
}

.logo-ai {
  display: inline-block;
  color: #ef4444;
  font-size: 1.18em;
  font-family: Arial, "Helvetica Neue", sans-serif;
  font-weight: 800;
  line-height: 1;
  transform: translateY(1px);
}

.logo-mark {
  width: 84px;
  height: 84px;
  object-fit: contain;
  flex: 0 0 84px;
}

.logo small {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
  margin-top: 6px;
}

.site-nav {
  justify-self: center;
}

.site-nav ul,
.subnav ul,
.footer-links,
.contact-list,
.meta-list,
.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a {
  position: relative;
  color: rgba(234, 240, 255, 0.88);
  font-size: 15px;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -12px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

.site-nav a.is-active {
  color: #fff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle,
.ghost-btn,
.primary-btn,
.video-play {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.ghost-btn,
.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-weight: 600;
  line-height: 1;
  text-align: center;
}

.ghost-btn {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.primary-btn {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  box-shadow: 0 16px 34px rgba(56, 189, 248, 0.22);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.2), transparent 32%), linear-gradient(180deg, #08101d 0%, #0e1728 100%);
  color: var(--text);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 16, 29, 0.92) 0%, rgba(8, 16, 29, 0.6) 42%, rgba(8, 16, 29, 0.36) 100%);
}

.hero-media {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  opacity: 0.42;
}

.hero-inner,
.page-hero-inner {
  position: relative;
  z-index: 1;
  padding: 88px 0 96px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: center;
}

.hero-grid-single {
  grid-template-columns: 1fr;
  min-height: 540px;
}

.hero-grid-single > div {
  max-width: 50%;
}

.eyebrow,
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  color: #8edfff;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow::before,
.section-eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: currentColor;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1.12;
}

.hero p,
.page-hero p {
  max-width: 660px;
  margin: 22px 0 0;
  color: rgba(234, 240, 255, 0.78);
  font-size: 16px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.hero-card,
.metric-card,
.feature-card,
.case-card,
.news-card,
.video-card,
.detail-card,
.contact-card,
.subnav,
.about-copy,
.timeline,
.panel {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  align-self: stretch;
  padding: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-card-text {
  display: flex;
  align-items: flex-end;
  min-height: 540px;
}

.hero-card-text .meta-list {
  width: 100%;
  margin-top: 0;
}

.hero-card img {
  border-radius: 6px;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.meta-list {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.meta-list li {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  color: rgba(234, 240, 255, 0.78);
  font-size: 14px;
}

.meta-list span {
  color: #fff;
}

.section {
  padding: 78px 0;
}

.section-alt {
  background: #eef3f9;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.section-head h2,
.section-head h3,
.about-copy h2,
.timeline h2,
.detail-main h1 {
  margin: 0;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.18;
}

.section-head p,
.intro,
.detail-main p,
.about-copy p,
.timeline p,
.footer-about p,
.contact-card p,
.subpage-copy {
  margin: 12px 0 0;
  color: var(--muted-dark);
  font-size: 15px;
}

.feature-grid,
.cards-grid,
.news-grid,
.partner-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.matrix-grid,
.showcase-grid,
.contact-grid,
.detail-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.about-metrics {
  margin-top: 28px;
}

.feature-card,
.case-card,
.news-card,
.video-card,
.detail-card,
.contact-card,
.panel {
  overflow: hidden;
  background: var(--surface-2);
  border: 1px solid rgba(23, 32, 51, 0.06);
}

.feature-card,
.detail-card,
.contact-card,
.panel {
  padding: 28px;
}

.feature-card h3,
.case-card h3,
.news-card h3,
.video-card h3,
.detail-card h3,
.contact-card h3,
.panel h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.3;
}

.feature-card p,
.case-card p,
.news-card p,
.video-card p,
.detail-card p,
.panel p {
  margin: 12px 0 0;
  color: var(--muted-dark);
}

.icon-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 22px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.16), rgba(59, 130, 246, 0.12));
  color: #155eef;
  font-weight: 700;
}

.stats-wrap {
  background: linear-gradient(180deg, #09111e 0%, #0f1a2d 100%);
  color: var(--text);
}

.metric-card {
  padding: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.metric-value {
  font-size: clamp(34px, 3vw, 48px);
  font-weight: 700;
  line-height: 1;
}

.metric-label {
  margin-top: 10px;
  color: rgba(234, 240, 255, 0.72);
}

.media-top {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card-body {
  padding: 22px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag-list li,
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(21, 94, 239, 0.08);
  color: #155eef;
  font-size: 13px;
}

.section-banner,
.page-hero {
  position: relative;
  overflow: hidden;
  background: #09111e;
  color: var(--text);
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(9, 17, 30, 0.9), rgba(9, 17, 30, 0.45));
}

.page-hero-media {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  opacity: 0.38;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: rgba(234, 240, 255, 0.72);
  font-size: 14px;
}

.breadcrumb a {
  color: #fff;
}

.subnav {
  position: sticky;
  top: 79px;
  z-index: 10;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(23, 32, 51, 0.06);
}

.subnav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.subnav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  color: var(--muted-dark);
  background: #eef3f9;
}

.subnav a.is-active,
.subnav a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.about-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 28px;
}

.about-copy,
.timeline {
  padding: 34px;
  background: #fff;
  border: 1px solid rgba(23, 32, 51, 0.06);
}

.timeline-list {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 20px;
}

.timeline-year {
  color: #155eef;
  font-size: 28px;
  font-weight: 700;
}

.contact-grid {
  align-items: stretch;
}

.contact-card strong,
.detail-side strong {
  display: block;
  margin-top: 14px;
  font-size: 18px;
}

.qr-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.qr-block img {
  width: 100%;
  border-radius: 6px;
  background: #fff;
}

.partner-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 108px;
  padding: 20px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid rgba(23, 32, 51, 0.06);
  color: #33415c;
  font-size: 18px;
  font-weight: 700;
  box-shadow: var(--shadow);
}

.video-cover {
  position: relative;
}

.video-play {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 72px;
  height: 72px;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.9);
  color: #155eef;
  font-size: 24px;
}

.detail-grid {
  align-items: start;
}

.detail-main,
.detail-side {
  padding: 34px;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid rgba(23, 32, 51, 0.06);
  box-shadow: var(--shadow);
}

.detail-main h1 {
  font-size: clamp(30px, 3vw, 42px);
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 18px 0 24px;
  color: var(--muted-dark);
  font-size: 14px;
}

.detail-main img {
  width: 100%;
  margin: 26px 0;
  border-radius: 6px;
}

.footer-cta {
  padding: 58px 0;
  background: linear-gradient(135deg, #0b1a34 0%, #11284d 100%);
  color: var(--text);
}

.footer-cta-grid,
.footer-grid {
  display: grid;
  gap: 24px;
}

.footer-cta-grid {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.site-footer {
  background: #08101d;
  color: rgba(234, 240, 255, 0.82);
}

.footer-main {
  padding: 60px 0 24px;
}

.footer-grid {
  grid-template-columns: 1.2fr 0.9fr 1fr 1fr;
}

.footer-about h3,
.footer-col h4 {
  margin: 0 0 18px;
  color: #fff;
}

.footer-links {
  display: grid;
  gap: 12px;
}

.contact-list {
  display: grid;
  gap: 12px;
}

.footer-bottom {
  padding: 18px 0 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(234, 240, 255, 0.58);
  font-size: 13px;
}

.mobile-nav {
  display: none;
}

@media (max-width: 1199px) {
  .site-nav ul {
    gap: 18px;
  }

  .hero-grid,
  .matrix-grid,
  .showcase-grid,
  .contact-grid,
  .detail-grid,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .subnav {
    position: static;
  }
}

@media (max-width: 991px) {
  .site-header-inner {
    grid-template-columns: auto auto;
    gap: 18px;
  }

  .site-nav,
  .header-actions .ghost-btn,
  .header-actions .primary-btn {
    display: none;
  }

  .menu-toggle,
  .mobile-nav {
    display: block;
  }

  .mobile-nav {
    padding: 0 16px 18px;
  }

  .mobile-nav[hidden] {
    display: none;
  }

  .mobile-nav ul {
    display: grid;
    gap: 10px;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .mobile-nav a {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 0 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
  }

  .hero-inner,
  .page-hero-inner,
  .section {
    padding: 64px 0;
  }

  .hero-grid,
  .feature-grid,
  .cards-grid,
  .news-grid,
  .partner-grid,
  .stats-grid,
  .matrix-grid,
  .showcase-grid,
  .contact-grid,
  .detail-grid,
  .footer-grid,
  .footer-cta-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid-single > div {
    max-width: 100%;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .hero-card-text {
    min-height: auto;
  }
}

@media (max-width: 767px) {
  .container {
    width: min(100% - 24px, var(--container));
  }

  .site-topbar-inner {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 10px 0;
  }

  .hero h1,
  .page-hero h1,
  .section-head h2,
  .about-copy h2,
  .timeline h2,
  .detail-main h1 {
    font-size: 30px;
  }

  .hero-actions,
  .subnav ul,
  .qr-block {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    display: grid;
  }

  .feature-card,
  .detail-card,
  .contact-card,
  .panel,
  .about-copy,
  .timeline,
  .detail-main,
  .detail-side {
    padding: 22px;
  }

  .about-metrics {
    grid-template-columns: 1fr !important;
  }
}