:root {
  --bg: #07111f;
  --bg-2: #0b1728;
  --card: rgba(255,255,255,.075);
  --card-strong: rgba(255,255,255,.11);
  --line: rgba(255,255,255,.14);
  --text: #eaf2ff;
  --muted: #aab8ca;
  --dark-text: #172033;
  --dark-muted: #5d6a7d;
  --soft: #f3f7fb;
  --primary: #2dd4bf;
  --primary-2: #60a5fa;
  --gold: #d6b46a;
  --shadow: 0 24px 80px rgba(4,12,24,.25);
  --radius-xl: 32px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--dark-text);
  background: #fff;
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; display: block; }
code {
  padding: 2px 7px;
  border-radius: 8px;
  background: rgba(13, 23, 38, .08);
  color: #0f766e;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}
.section {
  padding: 96px 0;
  position: relative;
}
.section-dark {
  background:
    radial-gradient(circle at 14% 16%, rgba(45,212,191,.18), transparent 28%),
    radial-gradient(circle at 86% 8%, rgba(96,165,250,.18), transparent 31%),
    linear-gradient(135deg, #06101f 0%, #0a1628 54%, #050b14 100%);
  color: var(--text);
  overflow: hidden;
}
.section-soft { background: var(--soft); }
.eyebrow {
  margin: 0 0 14px;
  color: var(--primary);
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-weight: 800;
}
.section-head {
  max-width: 820px;
  margin-bottom: 42px;
}
.section-head h2,
.video-copy h2,
.value-band h2,
.contact-card h2 {
  margin: 0 0 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.14;
  letter-spacing: -.04em;
}
.section-head p,
.video-copy p,
.value-band p,
.contact-card p {
  margin: 0;
  color: var(--dark-muted);
  font-size: 17px;
}
.section-dark .section-head p,
.section-dark .section-head h2 { color: var(--text); }
.section-dark .section-head p { color: var(--muted); }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(5, 12, 24, .82);
  backdrop-filter: blur(16px);
  border-color: rgba(255,255,255,.1);
}
.header-inner {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #04101c;
  font-weight: 900;
  box-shadow: 0 10px 30px rgba(45,212,191,.22);
}
.brand-text { display: grid; line-height: 1.15; }
.brand-text strong { font-size: 16px; letter-spacing: .02em; }
.brand-text em { font-size: 12px; color: rgba(255,255,255,.62); font-style: normal; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: rgba(255,255,255,.78);
  font-size: 14px;
}
.site-nav a:hover { color: #fff; }
.nav-cta {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.08);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 12px;
  background: rgba(255,255,255,.1);
  padding: 10px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: #fff;
  margin: 5px 0;
  border-radius: 999px;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 128px 0 88px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 58px;
  align-items: center;
}
.hero h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.05;
  letter-spacing: -.06em;
  max-width: 760px;
}
.hero-desc {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 660px;
}
.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #04101c;
  box-shadow: 0 18px 36px rgba(45,212,191,.24);
}
.btn-ghost {
  border: 1px solid rgba(255,255,255,.18);
  color: #fff;
  background: rgba(255,255,255,.06);
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 42px;
  max-width: 640px;
}
.hero-stats div {
  padding: 18px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 18px;
  background: rgba(255,255,255,.055);
}
.hero-stats strong {
  display: block;
  font-size: 22px;
  color: #fff;
  line-height: 1;
}
.hero-stats span {
  display: block;
  margin-top: 8px;
  color: rgba(255,255,255,.58);
  font-size: 13px;
}
.hero-panel {
  position: relative;
}
.phone-card {
  width: min(430px, 100%);
  margin-left: auto;
  padding: 18px;
  border-radius: 38px;
  border: 1px solid rgba(255,255,255,.18);
  background: linear-gradient(180deg, rgba(255,255,255,.16), rgba(255,255,255,.06));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.18);
  backdrop-filter: blur(14px);
}
.phone-top {
  width: 90px;
  height: 7px;
  border-radius: 999px;
  margin: 4px auto 22px;
  background: rgba(255,255,255,.28);
}
.status-card {
  display: flex;
  gap: 14px;
  padding: 18px;
  border-radius: 22px;
  background: rgba(4, 12, 24, .62);
  border: 1px solid rgba(255,255,255,.12);
}
.status-card strong { display: block; font-size: 18px; }
.status-card p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.pulse {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 8px rgba(45,212,191,.11);
}
.pulse::after {
  content: "";
  position: absolute;
  inset: -10px;
  border-radius: inherit;
  border: 1px solid rgba(45,212,191,.44);
  animation: ping 1.8s infinite;
}
.signal-map {
  position: relative;
  height: 320px;
  margin: 18px 0;
  border-radius: 28px;
  background:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px),
    radial-gradient(circle at 50% 50%, rgba(45,212,191,.18), transparent 42%);
  background-size: 34px 34px, 34px 34px, 100% 100%;
  border: 1px solid rgba(255,255,255,.1);
  overflow: hidden;
}
.node {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border-radius: 26px;
  background: rgba(6, 18, 32, .9);
  border: 1px solid rgba(255,255,255,.16);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
  box-shadow: 0 18px 36px rgba(0,0,0,.2);
}
.node-main {
  left: 50%; top: 50%; transform: translate(-50%, -50%);
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #03101c;
}
.node-a { left: 34px; top: 56px; }
.node-b { right: 38px; top: 74px; }
.node-c { left: 50%; bottom: 34px; transform: translateX(-50%); }
.line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(45,212,191,.8), transparent);
  transform-origin: left center;
  opacity: .8;
}
.line-a { width: 150px; left: 92px; top: 117px; transform: rotate(25deg); }
.line-b { width: 142px; left: 218px; top: 130px; transform: rotate(-22deg); }
.line-c { width: 120px; left: 158px; top: 216px; transform: rotate(90deg); }
.mini-list {
  display: grid;
  gap: 10px;
}
.mini-list p {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 14px;
  border-radius: 16px;
  background: rgba(255,255,255,.07);
  color: rgba(255,255,255,.78);
  font-size: 14px;
}
.mini-list span {
  width: 8px; height: 8px; border-radius: 50%; background: var(--primary);
}
.orb {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  filter: blur(12px);
  opacity: .16;
  pointer-events: none;
}
.orb-one { left: -120px; bottom: 10%; background: var(--primary); }
.orb-two { right: -110px; top: 15%; background: var(--primary-2); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.feature-card,
.product-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid rgba(16, 32, 54, .08);
  box-shadow: 0 18px 50px rgba(22, 38, 63, .07);
}
.feature-card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  margin-bottom: 22px;
  background: #eefaf8;
  color: #0f766e;
  font-weight: 900;
}
.feature-card h3,
.product-card h3,
.step h3 {
  margin: 0 0 10px;
  font-size: 21px;
  letter-spacing: -.03em;
}
.feature-card p,
.product-card p,
.step p {
  margin: 0;
  color: var(--dark-muted);
  font-size: 15px;
}
.product-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr .85fr;
  gap: 18px;
}
.product-card.large { grid-row: span 2; }
.product-card {
  min-height: 260px;
  display: flex;
  flex-direction: column;
}
.product-tag {
  width: fit-content;
  margin-bottom: 20px;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(45,212,191,.12);
  color: #0f766e;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.product-card ul {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.product-card li {
  position: relative;
  padding-left: 22px;
  color: #3c495c;
  font-size: 14px;
}
.product-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
}
.process .timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
}
.step {
  padding: 26px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
}
.step span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #03101c;
  font-weight: 900;
}
.step p { color: var(--muted); }
.step h3 { color: #fff; }
.video-layout {
  display: grid;
  grid-template-columns: .78fr 1.22fr;
  gap: 44px;
  align-items: center;
}
.video-notes {
  margin-top: 24px;
  display: grid;
  gap: 12px;
}
.video-notes p {
  padding: 15px 16px;
  border-radius: 16px;
  background: var(--soft);
  font-size: 14px;
}
.video-shell {
  padding: 12px;
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(45,212,191,.25), rgba(96,165,250,.25));
  box-shadow: var(--shadow);
}
.video-shell video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 22px;
  background: #07111f;
  object-fit: cover;
}
.value-band {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 34px;
  align-items: center;
  padding: 46px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 0 0, rgba(45,212,191,.2), transparent 34%),
    linear-gradient(135deg, #07111f, #0d1b2f);
  color: #fff;
  box-shadow: var(--shadow);
}
.value-band p { color: rgba(255,255,255,.7); }
.value-band h2 { color: #fff; }
.contact-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 34px;
  align-items: center;
  padding: 44px;
  border-radius: var(--radius-xl);
  background: #fff;
  border: 1px solid rgba(16, 32, 54, .08);
  box-shadow: 0 20px 70px rgba(22, 38, 63, .08);
}
.contact-info {
  display: grid;
  gap: 12px;
  min-width: 280px;
}
.contact-link {
  display: block;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--soft);
  color: #0f766e;
  font-weight: 900;
}
.contact-info p { font-size: 14px; }
.site-footer {
  padding: 26px 0;
  background: #050b14;
  color: rgba(255,255,255,.62);
  font-size: 14px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-inner p { margin: 0; }
.footer-inner a { color: #fff; }
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}
@keyframes ping {
  0% { transform: scale(.7); opacity: .7; }
  100% { transform: scale(1.55); opacity: 0; }
}

@media (max-width: 1024px) {
  .hero-grid,
  .video-layout,
  .value-band,
  .contact-card {
    grid-template-columns: 1fr;
  }
  .phone-card { margin: 0; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .product-card.large { grid-row: auto; grid-column: span 2; }
  .process .timeline { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .container { width: min(100% - 28px, var(--container)); }
  .section { padding: 72px 0; }
  .header-inner { height: 68px; }
  .brand-text strong { font-size: 14px; }
  .site-nav {
    position: absolute;
    top: 68px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border-radius: 20px;
    background: rgba(6, 16, 31, .96);
    border: 1px solid rgba(255,255,255,.12);
    box-shadow: var(--shadow);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 13px 14px; }
  .nav-toggle { display: block; }
  .hero { padding-top: 108px; }
  .hero-stats { grid-template-columns: 1fr; }
  .feature-grid,
  .product-grid,
  .process .timeline {
    grid-template-columns: 1fr;
  }
  .product-card.large { grid-column: auto; }
  .phone-card { border-radius: 28px; }
  .signal-map { height: 280px; }
  .contact-card,
  .value-band { padding: 28px; }
  .contact-info { min-width: 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}