:root {
  --bg: #06111f;
  --bg-deep: #020813;
  --surface: rgba(11, 24, 44, 0.62);
  --surface-strong: rgba(6, 19, 36, 0.9);
  --line: rgba(119, 212, 255, 0.18);
  --line-strong: rgba(119, 212, 255, 0.42);
  --text: #eef7ff;
  --muted: rgba(222, 239, 255, 0.74);
  --accent: #78ecff;
  --accent-strong: #46c2ff;
  --glow: rgba(90, 224, 255, 0.35);
  --hero-max: 1400px;
  --body-max: 1180px;
  --radius: 28px;
  --shadow: 0 30px 80px rgba(1, 8, 18, 0.46);
  --font-display: "Space Grotesk", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(54, 145, 255, 0.22), transparent 32%),
    radial-gradient(circle at 80% 15%, rgba(99, 236, 255, 0.15), transparent 22%),
    linear-gradient(180deg, #07101c 0%, #050b15 52%, #02060d 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

button {
  font: inherit;
}

.signal-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.72;
  pointer-events: none;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--hero-max);
  margin: 0 auto;
  padding: 20px 28px;
  backdrop-filter: blur(16px);
}

.site-header::after {
  content: "";
  position: absolute;
  inset: 10px 18px auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

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

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: radial-gradient(circle, #d9fbff 0%, var(--accent) 42%, rgba(120, 236, 255, 0.12) 100%);
  box-shadow: 0 0 30px rgba(120, 236, 255, 0.5);
}

.brand-copy {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand-copy strong {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-copy span {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 22px;
}

.site-nav a {
  position: relative;
  font-size: 0.92rem;
  color: var(--muted);
  transition: color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 180ms ease;
}

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

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

.menu-toggle {
  display: none;
  width: 52px;
  height: 52px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(7, 17, 31, 0.82);
  color: var(--text);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.menu-toggle span {
  position: absolute;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: transform 180ms ease;
}

.menu-toggle span:first-child {
  transform: translateY(-4px);
}

.menu-toggle span:last-child {
  transform: translateY(4px);
}

body.menu-open .menu-toggle span:first-child {
  transform: rotate(45deg);
}

body.menu-open .menu-toggle span:last-child {
  transform: rotate(-45deg);
}

.section {
  width: min(calc(100% - 48px), var(--body-max));
  margin: 0 auto;
  padding: 112px 0;
}

.hero {
  width: min(calc(100% - 32px), var(--hero-max));
  min-height: calc(100svh - 92px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 56px;
  padding-top: 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.7fr);
  gap: 36px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.hero h1,
.section h2,
.capability-item h3 {
  margin: 0;
  font-family: var(--font-display);
}

.hero h1 {
  max-width: 9ch;
  font-size: clamp(4rem, 10vw, 8rem);
  line-height: 0.92;
  letter-spacing: -0.05em;
}

.hero h1 span {
  display: block;
  max-width: 7ch;
  margin-top: 22px;
  font-size: clamp(1.2rem, 2vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: 0;
  color: var(--muted);
}

.hero-text,
.positioning-copy p,
.capability-item p,
.hainan-copy p,
.contact-copy p,
.contact-note,
.hero-footer p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.hero-text {
  max-width: 36rem;
  margin: 26px 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 156px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    transform 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

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

.button.primary {
  color: #04111f;
  background: linear-gradient(135deg, #dffcff 0%, #77ddff 48%, #4dc7ff 100%);
  box-shadow: 0 18px 50px rgba(70, 194, 255, 0.3);
}

.button.secondary {
  border-color: var(--line-strong);
  background: rgba(6, 17, 31, 0.34);
}

.hero-panel {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(10, 23, 42, 0.88), rgba(6, 17, 31, 0.62)),
    radial-gradient(circle at top right, rgba(119, 212, 255, 0.2), transparent 40%);
  box-shadow: var(--shadow);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.08) 28%, transparent 45%),
    linear-gradient(180deg, rgba(122, 231, 255, 0.06), transparent);
  mix-blend-mode: screen;
  animation: shimmer 8s linear infinite;
}

.hero-panel-head,
.panel-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.hero-panel-head {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 18px;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-panel-head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), transparent);
}

.hero-panel-body {
  display: grid;
  gap: 18px;
}

.panel-line span {
  color: var(--muted);
  font-size: 0.92rem;
}

.panel-line strong {
  text-align: right;
  font-size: 1rem;
  font-weight: 700;
}

.hero-footer {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.hero-footer div {
  padding-right: 18px;
}

.hero-footer span,
.capability-index {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.18em;
}

.section-intro {
  max-width: 880px;
  margin-bottom: 42px;
}

.section h2 {
  font-size: clamp(2.1rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.positioning-layout,
.hainan-layout,
.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 32px;
  align-items: start;
}

.lead {
  margin: 0;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.55;
}

.positioning-copy,
.hainan-copy {
  display: grid;
  gap: 18px;
}

.positioning-copy p,
.hainan-copy p,
.contact-copy p {
  margin: 0;
}

.capability-list {
  border-top: 1px solid var(--line);
}

.capability-item {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 18px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.capability-item h3 {
  margin-bottom: 8px;
  font-size: clamp(1.5rem, 2.2vw, 2rem);
  line-height: 1.2;
}

.capability-item p {
  max-width: 40rem;
  margin: 0;
}

.quote {
  margin: 0;
  padding: 34px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(10, 23, 42, 0.8), rgba(6, 17, 31, 0.44));
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 2.25rem);
  line-height: 1.45;
  box-shadow: var(--shadow);
}

.contact-section {
  position: relative;
  padding: 54px 0 140px;
}

.contact-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(460px, 100%);
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.contact-actions {
  display: grid;
  gap: 18px;
  justify-items: start;
}

.contact-note {
  margin: 0;
  max-width: 22rem;
}

.site-footer {
  width: min(calc(100% - 48px), var(--body-max));
  margin: 0 auto;
  padding: 0 0 36px;
  color: rgba(238, 247, 255, 0.58);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

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

@keyframes shimmer {
  0% {
    transform: translateX(-12%);
  }

  100% {
    transform: translateX(18%);
  }
}

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

  .hero-panel::before,
  .reveal {
    animation: none;
    transition: none;
  }

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

@media (max-width: 960px) {
  .site-header {
    padding: 18px 20px;
  }

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

  .site-nav {
    position: fixed;
    inset: 86px 20px auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(3, 11, 22, 0.94);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition:
      opacity 180ms ease,
      transform 180ms ease;
  }

  body.menu-open .site-nav {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .hero {
    padding-top: 22px;
  }

  .hero-grid,
  .positioning-layout,
  .hainan-layout,
  .contact-section,
  .hero-footer {
    grid-template-columns: 1fr;
  }

  .hero-footer div {
    padding-right: 0;
  }
}

@media (max-width: 720px) {
  .section {
    width: min(calc(100% - 32px), var(--body-max));
    padding: 86px 0;
  }

  .hero {
    width: min(calc(100% - 20px), var(--hero-max));
    min-height: calc(100svh - 84px);
    gap: 42px;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(3rem, 17vw, 4.8rem);
  }

  .hero h1 span {
    max-width: 100%;
  }

  .hero-panel,
  .quote {
    padding: 22px;
  }

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

  .site-footer {
    width: min(calc(100% - 32px), var(--body-max));
  }
}