:root {
  --brand-blue: #004098;
  --brand-red: #e60012;
  --ink: #101520;
  --muted: #667085;
  --line: #d9e1ee;
  --paper: #f5f8fc;
  --white: #ffffff;
  --cyan: #26b7ff;
  --graphite: #202a36;
  --shadow: 0 26px 70px rgba(0, 31, 76, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Aptos", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 4vw, 56px);
  color: var(--white);
  transition: background 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.site-header.is-solid {
  background: rgba(0, 33, 77, 0.9);
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 14px 40px rgba(0, 31, 76, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand-logo {
  display: block;
  width: clamp(168px, 17vw, 236px);
  height: auto;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  background: var(--brand-blue);
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: var(--white);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 29px;
  font-weight: 700;
  line-height: 1;
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 5px;
  right: 5px;
  width: 8px;
  height: 8px;
  background: var(--brand-red);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 20px;
  line-height: 1;
}

.brand small {
  margin-top: 3px;
  color: currentColor;
  font-size: 11px;
  letter-spacing: 0;
  opacity: 0.72;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
  color: currentColor;
  font-size: 14px;
}

.nav-links a {
  opacity: 0.8;
}

.nav-links a:hover {
  opacity: 1;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.nav-cta:hover,
.button:hover {
  transform: translateY(-2px);
}

.site-header.is-solid .nav-cta {
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--white);
}

.hero {
  position: relative;
  min-height: 82vh;
  overflow: hidden;
  color: var(--white);
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(0, 20, 48, 0.88) 0%, rgba(0, 38, 88, 0.66) 41%, rgba(0, 42, 96, 0.18) 76%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0.58));
}

.hero-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 132px 0 44px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--brand-red);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 720px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(66px, 9.4vw, 128px);
  line-height: 0.88;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 700px;
  margin: 30px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(18px, 2.4vw, 25px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button.primary {
  background: var(--brand-red);
  border-color: var(--brand-red);
  color: var(--white);
  box-shadow: 0 16px 40px rgba(230, 0, 18, 0.26);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--white);
  backdrop-filter: blur(14px);
}

.button.large {
  min-height: 52px;
  padding-inline: 28px;
  font-size: 16px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(780px, 100%);
  margin: 44px 0 0;
  padding: 0;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(18px);
}

.hero-metrics div {
  padding: 22px 24px;
  background: rgba(0, 31, 76, 0.46);
}

.hero-metrics dt {
  font-size: 24px;
  font-weight: 800;
}

.hero-metrics dd {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.section-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.intro-band {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.intro-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.5fr 1.1fr;
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  padding: 72px 0;
}

.intro-grid h2,
.section-heading h2,
.governance-copy h2,
.cta-inner h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.04;
  letter-spacing: 0;
}

.intro-grid p:last-child,
.section-heading p,
.governance-copy p,
.cta-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.capability-section {
  padding: 104px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 44px;
}

.section-heading h2 {
  margin-bottom: 18px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow);
}

.capability-card {
  min-height: 320px;
  padding: 30px;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(0, 64, 152, 0.05), rgba(255, 255, 255, 0) 42%),
    var(--white);
}

.capability-card:last-child {
  border-right: 0;
}

.card-index {
  color: var(--brand-red);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 38px;
  line-height: 1;
}

.capability-card h3,
.scenario-item h3 {
  margin: 34px 0 14px;
  font-size: 22px;
  line-height: 1.25;
}

.capability-card p,
.scenario-item p {
  margin: 0;
  color: var(--muted);
}

.scenario-section {
  padding: 104px 0;
  background:
    linear-gradient(135deg, rgba(0, 64, 152, 0.96), rgba(10, 20, 32, 0.98)),
    var(--brand-blue);
  color: var(--white);
}

.section-heading.light p,
.scenario-item p {
  color: rgba(255, 255, 255, 0.72);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.scenario-item {
  min-height: 250px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.07);
}

.scenario-item::before {
  content: "";
  display: block;
  width: 44px;
  height: 4px;
  background: var(--brand-red);
}

.governance-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(34px, 6vw, 86px);
  align-items: center;
  padding: 104px 0;
}

.governance-copy p {
  margin-top: 24px;
}

.governance-list {
  border-top: 1px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow);
}

.governance-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 28px 30px;
  border-bottom: 1px solid var(--line);
}

.governance-row span {
  color: var(--brand-red);
  font-weight: 800;
}

.governance-row strong {
  font-size: 20px;
  line-height: 1.45;
}

.cta-section {
  padding: 96px 20px;
  background: var(--graphite);
  color: var(--white);
}

.cta-inner {
  width: min(980px, 100%);
  margin: 0 auto;
  text-align: center;
}

.cta-inner p {
  max-width: 680px;
  margin: 22px auto 32px;
  color: rgba(255, 255, 255, 0.72);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(20px, 4vw, 56px);
  background: #111821;
  color: rgba(255, 255, 255, 0.7);
}

.footer-brand {
  color: var(--white);
}

.footer-brand .brand-logo {
  width: 210px;
}

.site-footer p {
  margin: 0;
}

.site-footer a:not(.brand) {
  color: var(--white);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .hero {
    min-height: 80vh;
  }

  .hero-inner {
    padding-top: 120px;
  }

  .intro-grid,
  .governance-section {
    grid-template-columns: 1fr;
  }

  .capability-grid,
  .scenario-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .capability-card:nth-child(2) {
    border-right: 0;
  }

  .capability-card {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 14px 18px;
  }

  .brand small,
  .nav-cta {
    display: none;
  }

  .brand-logo {
    width: 156px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .hero {
    min-height: 78vh;
  }

  .hero-media {
    object-position: 68% center;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(0, 20, 48, 0.94), rgba(0, 45, 96, 0.58)),
      linear-gradient(180deg, rgba(0, 0, 0, 0.16), rgba(0, 0, 0, 0.72));
  }

  .hero-inner {
    width: calc(100% - 32px);
    padding: 96px 0 30px;
  }

  .hero h1 {
    font-size: 66px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .hero-metrics,
  .capability-grid,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-metrics div {
    padding: 14px 12px;
  }

  .hero-metrics dt {
    font-size: 19px;
  }

  .hero-metrics dd {
    font-size: 12px;
  }

  .section-shell {
    width: calc(100% - 32px);
  }

  .intro-grid,
  .capability-section,
  .scenario-section,
  .governance-section,
  .cta-section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .capability-card,
  .scenario-item {
    min-height: auto;
    padding: 24px;
    border-right: 0;
  }

  .governance-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 24px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}