:root {
  --bg: #06101d;
  --bg-elevated: rgba(11, 24, 42, 0.8);
  --bg-solid: #0d1e35;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-strong: rgba(13, 30, 53, 0.92);
  --text: #f4f8ff;
  --muted: #9eb2cb;
  --line: rgba(142, 170, 207, 0.18);
  --accent: #1fd1b1;
  --accent-deep: #0f8f92;
  --accent-warm: #ffbf6b;
  --shadow: 0 22px 60px rgba(1, 10, 22, 0.35);
  --max-width: 1200px;
  --font-sans: "MiSans", "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(31, 209, 177, 0.16), transparent 30%),
    radial-gradient(circle at 88% 18%, rgba(255, 191, 107, 0.12), transparent 24%),
    linear-gradient(180deg, #04101e 0%, #071524 50%, #06101d 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(158, 178, 203, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(158, 178, 203, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 92%);
  pointer-events: none;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

.ambient {
  position: fixed;
  filter: blur(18px);
  pointer-events: none;
  opacity: 0.38;
}

.ambient-left {
  top: 120px;
  left: -120px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(31, 209, 177, 0.45), transparent 70%);
}

.ambient-right {
  right: -120px;
  bottom: 80px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(255, 191, 107, 0.32), transparent 72%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(calc(100% - 32px), var(--max-width));
  margin: 20px auto 0;
  padding: 16px 20px;
  border: 1px solid var(--line);
  background: rgba(6, 16, 29, 0.72);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: block;
  min-width: 0;
}

.brand-copy {
  display: block;
}

.brand-copy strong {
  display: block;
  font-size: 1.14rem;
  font-weight: 700;
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  font-size: 1.04rem;
  font-weight: 600;
  color: var(--muted);
  transition: color 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  font-size: 1.04rem;
  border: 1px solid transparent;
  transition:
    transform 180ms ease,
    background 180ms ease,
    border-color 180ms ease;
}

.header-cta,
.button-primary {
  color: #04101d;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #7debd8 58%, var(--accent-warm));
}

.button-secondary {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
}

.header-cta:hover,
.button:hover {
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  background: currentColor;
}

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

.section {
  padding: 112px 0 0;
}

.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 42px;
  align-items: center;
  min-height: calc(100vh - 140px);
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--accent-warm);
  letter-spacing: 0.12em;
  font-size: 0.98rem;
  font-weight: 700;
  text-transform: uppercase;
}

.section-kicker::before {
  content: "";
  width: 30px;
  height: 1px;
  background: currentColor;
}

.hero h1,
.section-heading h2,
.contact-card h2 {
  margin: 0;
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.hero h1 {
  max-width: 11ch;
  font-size: clamp(3.5rem, 7.4vw, 6.9rem);
}

.hero-text,
.section-heading p,
.contact-card p,
.metric-card p,
.info-card p,
.scenario-card p,
.scenario-feature p,
.timeline-item p,
.about-points p {
  color: var(--muted);
  line-height: 1.78;
}

.hero-text {
  max-width: 60ch;
  margin: 22px 0 0;
  font-size: 1.2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.hero-panel {
  position: relative;
}

.panel-shell,
.stats-card,
.info-card,
.scenario-card,
.scenario-feature,
.contact-card,
.about-points article {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    var(--surface-strong);
  box-shadow: var(--shadow);
}

.panel-shell {
  padding: 28px;
}

.panel-shell::before,
.stats-card::before,
.info-card::before,
.scenario-card::before,
.scenario-feature::before,
.contact-card::before,
.about-points article::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.14), transparent 72%);
  pointer-events: none;
}

.panel-topline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.metric-card {
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.accent-card {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(31, 209, 177, 0.18), rgba(255, 191, 107, 0.12));
}

.metric-label,
.card-index,
.timeline-item span,
.contact-meta span,
.stats-list span {
  display: inline-block;
  color: var(--accent-warm);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.metric-card strong,
.stats-card strong,
.info-card h3,
.scenario-card h3,
.scenario-feature h3,
.timeline-item h3,
.about-points h3,
.contact-meta strong {
  display: block;
  margin-top: 12px;
  font-size: 1.22rem;
  line-height: 1.4;
}

.panel-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.panel-flow div {
  padding: 16px;
  background: rgba(255, 255, 255, 0.04);
}

.panel-flow span {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--accent);
}

.panel-flow p {
  margin: 12px 0 0;
}

.stats-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: stretch;
}

.stats-card {
  padding: 28px;
}

.stats-card p {
  margin: 0 0 18px;
  color: var(--accent);
  font-weight: 700;
}

.stats-card strong {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

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

.stats-list article {
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.stats-list strong {
  display: block;
  margin-top: 12px;
  font-size: 1.16rem;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2,
.contact-card h2 {
  font-size: clamp(2rem, 4vw, 3.6rem);
}

.section-heading p {
  margin: 20px 0 0;
}

.card-grid {
  display: grid;
  gap: 18px;
}

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

.info-card {
  padding: 28px;
}

.scenario-layout,
.about-layout {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 24px;
  align-items: start;
}

.scenario-feature {
  padding: 28px;
  min-height: 100%;
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.scenario-card {
  padding: 24px;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 22px;
  align-items: start;
  padding: 26px 28px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.timeline-item span {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  color: #04101d;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-warm));
}

.timeline-item h3,
.timeline-item p {
  margin: 0;
}

.timeline-item p {
  margin-top: 12px;
}

.about-points {
  display: grid;
  gap: 18px;
}

.about-points article {
  padding: 26px;
}

.contact-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  padding: 34px;
}

.contact-meta {
  display: grid;
  gap: 16px;
}

.contact-meta div {
  padding: 20px 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: min(calc(100% - 32px), var(--max-width));
  margin: 96px auto 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

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

.site-header,
.brand-mark,
.header-cta,
.button,
.menu-toggle,
.hero-points li,
.panel-shell,
.stats-card,
.info-card,
.scenario-card,
.scenario-feature,
.contact-card,
.about-points article,
.metric-card,
.panel-flow div,
.stats-list article,
.timeline-item,
.timeline-item span,
.contact-meta div {
  border-radius: 0 !important;
  clip-path: none !important;
  mask-image: none !important;
  -webkit-mask-image: none !important;
}

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

.reveal-delay {
  transition-delay: 120ms;
}

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

@media (max-width: 1100px) {
  .site-header {
  }

  .hero,
  .stats-section,
  .scenario-layout,
  .about-layout,
  .contact-card {
    grid-template-columns: 1fr;
  }

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

  .hero h1 {
    max-width: none;
  }
}

@media (max-width: 860px) {
  .site-header {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 16px;
    padding: 16px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    grid-column: 1 / -1;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 8px 0 0;
  }

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

  .header-cta {
    justify-self: end;
  }

  .section {
    padding-top: 88px;
  }

  .hero {
    min-height: auto;
    padding-top: 38px;
  }

  .panel-grid,
  .panel-flow,
  .services-grid,
  .scenario-list {
    grid-template-columns: 1fr;
  }

  .accent-card {
    grid-column: auto;
  }

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

@media (max-width: 620px) {
  .site-header {
    width: min(calc(100% - 20px), var(--max-width));
    margin-top: 10px;
    padding: 14px;
  }

  main,
  .site-footer {
    width: min(calc(100% - 20px), var(--max-width));
  }

  .brand-copy strong {
    font-size: 1rem;
    white-space: normal;
  }

  .header-cta {
    display: none;
  }

  .hero h1 {
    font-size: clamp(2.9rem, 13vw, 4.3rem);
  }

  .hero-text {
    font-size: 1.1rem;
  }

  .section-heading h2,
  .contact-card h2,
  .stats-card strong {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
  }

  .panel-shell,
  .stats-card,
  .info-card,
  .scenario-card,
  .scenario-feature,
  .contact-card,
  .about-points article,
  .timeline-item {
    padding: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal,
  .reveal-delay,
  .header-cta,
  .button {
    transition: none;
  }
}