:root {
  color-scheme: light;
  --ink: #0a1b2e;
  --ink-soft: #3d4e61;
  --navy: #06182c;
  --navy-2: #0b2943;
  --teal: #20c5a2;
  --teal-dark: #12896f;
  --orange: #f2a33a;
  --mist: #f3f7f8;
  --line: #dce6e9;
  --white: #ffffff;
  --shell: min(1180px, calc(100vw - 48px));
  --shadow: 0 28px 80px rgba(4, 28, 48, 0.16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.shell { width: var(--shell); margin: 0 auto; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  transform: translateY(-150%);
  color: var(--navy);
  background: var(--white);
  border-radius: 8px;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  background: rgba(5, 22, 40, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(16px);
}
.nav-shell {
  width: var(--shell);
  height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: inline-flex; align-items: center; gap: 12px; color: white; }
.brand-mark {
  position: relative;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.07);
}
.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  top: 9px;
  background: var(--orange);
}
.brand-mark::before { left: 7px; }
.brand-mark::after { right: 7px; }
.brand-mark span {
  width: 19px;
  height: 16px;
  margin-top: 8px;
  border-radius: 4px 4px 9px 9px;
  background: var(--teal);
}
.brand-copy { display: flex; flex-direction: column; line-height: 1.15; }
.brand-copy strong { font-size: 17px; letter-spacing: 0.06em; }
.brand-copy small { margin-top: 4px; font-size: 9px; letter-spacing: 0.14em; opacity: 0.64; }
.main-nav { display: flex; align-items: center; gap: 34px; }
.main-nav a { color: rgba(255, 255, 255, 0.78); font-size: 15px; transition: color 180ms ease; }
.main-nav a:hover, .main-nav a:focus-visible { color: white; }
.main-nav .nav-contact {
  padding: 9px 16px;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
}
.menu-button { display: none; }

.hero {
  position: relative;
  min-height: 800px;
  padding: 150px 0 90px;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 82% 24%, rgba(31, 197, 162, 0.17), transparent 34%),
    linear-gradient(135deg, #051426 0%, #08233b 56%, #071a2f 100%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(255,255,255,0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.09) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 88%);
}
.hero-orb { position: absolute; border-radius: 50%; filter: blur(1px); }
.hero-orb-one { width: 470px; height: 470px; right: -260px; top: 120px; border: 1px solid rgba(32,197,162,.24); }
.hero-orb-two { width: 280px; height: 280px; left: -190px; bottom: 12px; border: 1px solid rgba(242,163,58,.22); }
.hero-layout { position: relative; display: grid; grid-template-columns: 1.04fr 0.96fr; align-items: center; gap: 64px; }
.eyebrow,
.section-kicker {
  margin: 0 0 22px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.13em;
}
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { width: 28px; height: 2px; background: var(--orange); }
.hero h1 {
  margin: 0;
  font-size: clamp(44px, 4.5vw, 64px);
  line-height: 1.16;
  letter-spacing: -0.045em;
  font-weight: 700;
}
.hero h1 em { color: var(--teal); font-style: normal; }
.hero-summary {
  max-width: 620px;
  margin: 28px 0 0;
  color: rgba(255,255,255,.72);
  font-size: 18px;
  line-height: 1.9;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }
.button {
  min-height: 48px;
  padding: 11px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 650;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #05251f; background: var(--teal); }
.button-primary:hover { background: #43d6b7; }
.button-ghost { color: white; border: 1px solid rgba(255,255,255,.25); }
.button-ghost:hover { border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.06); }
.hero-metrics {
  margin: 52px 0 0;
  padding: 28px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  border-top: 1px solid rgba(255,255,255,.12);
}
.hero-metrics div { min-width: 0; }
.hero-metrics dt { color: white; font-size: 19px; font-weight: 700; }
.hero-metrics dd { margin: 5px 0 0; color: rgba(255,255,255,.51); font-size: 13px; }

.hero-visual { position: relative; }
.visual-frame {
  position: relative;
  min-height: 530px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 26px;
  background: #0b2943;
  box-shadow: 0 38px 110px rgba(0,0,0,.38);
}
.hero-image { width: 100%; height: 530px; object-fit: cover; opacity: .88; }
.visual-shade { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 36%, rgba(3,18,31,.82) 100%); }
.signal-card,
.device-chip {
  position: absolute;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(6,25,43,.77);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 40px rgba(0,0,0,.24);
}
.signal-card-main {
  right: 22px;
  bottom: 25px;
  left: 22px;
  padding: 18px;
  border-radius: 16px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
}
.status-pulse { width: 11px; height: 11px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 8px rgba(32,197,162,.12); }
.signal-card small { display: block; color: rgba(255,255,255,.52); font-size: 12px; }
.signal-card strong { display: block; margin-top: 2px; color: white; font-size: 15px; }
.signal-card b { color: var(--teal); font-size: 18px; }
.signal-card-time { top: 24px; right: 22px; width: 154px; padding: 15px 17px; border-radius: 15px; }
.signal-card-time strong { margin: 2px 0; font-size: 30px; }
.signal-card-time span { color: rgba(255,255,255,.61); font-size: 11px; }
.device-chip { padding: 10px 13px; display: flex; gap: 8px; align-items: center; border-radius: 999px; font-size: 12px; }
.device-chip i { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); }
.device-chip b { color: var(--teal); font-weight: 600; }
.chip-one { left: 22px; top: 70px; }
.chip-two { left: 52px; top: 122px; }

.trust-strip { background: var(--orange); color: #261704; }
.trust-items { min-height: 62px; display: flex; align-items: center; justify-content: center; gap: 26px; font-size: 14px; font-weight: 700; letter-spacing: .08em; }
.trust-items i { width: 4px; height: 4px; border-radius: 50%; background: rgba(38,23,4,.45); }

.section { padding: 112px 0; }
.section-light { background: var(--mist); }
.section-heading { max-width: 720px; }
.section-heading h2,
.about-copy h2,
.contact-panel h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.25;
  letter-spacing: -0.035em;
}
.section-heading > p:last-child { margin: 20px 0 0; color: var(--ink-soft); font-size: 18px; }
.flow-board {
  margin-top: 58px;
  display: grid;
  grid-template-columns: 1fr 62px 1fr 62px 1fr 62px 1fr;
  align-items: stretch;
}
.flow-step {
  position: relative;
  min-height: 275px;
  padding: 28px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(9,38,59,.06);
}
.flow-step > span { position: absolute; top: 22px; right: 23px; color: #9aabb7; font-size: 13px; font-weight: 700; }
.flow-icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 14px; color: var(--teal-dark); background: #e5f7f3; font-size: 13px; font-weight: 700; }
.flow-step h3 { margin: 38px 0 10px; font-size: 20px; }
.flow-step p { margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 1.75; }
.flow-connector { position: relative; align-self: center; height: 1px; background: #a8bcc2; }
.flow-connector::after { content: ""; position: absolute; right: -1px; top: -4px; width: 8px; height: 8px; border-top: 1px solid #a8bcc2; border-right: 1px solid #a8bcc2; transform: rotate(45deg); }
.flow-connector b { position: absolute; top: -3px; left: 50%; width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 5px #e3f3f0; }

.section-dark { color: white; background: var(--navy); }
.heading-dark > p:last-child { color: rgba(255,255,255,.58); }
.capability-grid { margin-top: 58px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.capability-card {
  position: relative;
  min-height: 330px;
  padding: 38px;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(255,255,255,.065), rgba(255,255,255,.025));
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 20px;
}
.capability-card::after { content: ""; position: absolute; width: 150px; height: 150px; right: -80px; bottom: -90px; border: 1px solid rgba(32,197,162,.28); border-radius: 50%; }
.card-number { color: var(--orange); font-size: 13px; font-weight: 750; letter-spacing: .12em; }
.capability-card h3 { margin: 48px 0 12px; font-size: 25px; }
.capability-card p { max-width: 500px; margin: 0; color: rgba(255,255,255,.64); }
.capability-card ul { margin: 28px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.capability-card li { padding: 7px 11px; border: 1px solid rgba(255,255,255,.12); border-radius: 999px; color: rgba(255,255,255,.74); font-size: 13px; }

.section-about { background: white; }
.about-layout { display: grid; grid-template-columns: .88fr 1.12fr; gap: 100px; }
.about-copy h2 { font-size: clamp(32px, 4vw, 50px); }
.about-detail { padding-top: 50px; }
.about-lead { margin: 0; color: var(--ink-soft); font-size: 21px; line-height: 1.85; }
.principles { margin-top: 45px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principles div { padding: 24px 18px 24px 0; display: flex; flex-direction: column; gap: 6px; }
.principles div + div { padding-left: 20px; border-left: 1px solid var(--line); }
.principles b { color: var(--teal-dark); font-size: 18px; }
.principles span { color: #657585; font-size: 13px; }
.location { margin: 26px 0 0; display: flex; align-items: center; gap: 10px; color: #657585; }
.location span { width: 9px; height: 9px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 6px #fff0dc; }

.contact-section { padding: 0 0 112px; background: white; }
.contact-panel {
  padding: 58px 62px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 50px;
  color: white;
  background:
    radial-gradient(circle at 95% 0, rgba(32,197,162,.22), transparent 34%),
    var(--navy-2);
  border-radius: 24px;
  box-shadow: var(--shadow);
}
.contact-panel h2 { font-size: clamp(32px, 4vw, 48px); }
.contact-panel p:last-child { max-width: 650px; margin: 18px 0 0; color: rgba(255,255,255,.62); }
.contact-mail { min-width: 320px; padding: 22px 24px; border: 1px solid rgba(255,255,255,.17); border-radius: 14px; background: rgba(255,255,255,.06); transition: border-color 180ms ease, background 180ms ease; }
.contact-mail:hover { border-color: var(--teal); background: rgba(32,197,162,.08); }
.contact-mail small { display: block; color: var(--teal); font-size: 12px; }
.contact-mail strong { display: block; margin-top: 5px; font-size: 17px; }

.site-footer { padding: 36px 0; color: rgba(255,255,255,.58); background: #04101e; }
.footer-inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; }
.footer-inner div { display: flex; flex-direction: column; }
.footer-inner strong { color: white; font-size: 15px; }
.footer-inner span, .footer-inner p { margin: 4px 0 0; font-size: 12px; }

.reveal { opacity: 1; transform: none; transition: opacity 700ms ease, transform 700ms ease; }
.js .reveal { opacity: 0; transform: translateY(22px); }
.js .reveal.visible { opacity: 1; transform: translateY(0); }
.hero .reveal { opacity: 1; transform: none; }
.capability-card:nth-child(2) { transition-delay: 80ms; }
.capability-card:nth-child(3) { transition-delay: 130ms; }
.capability-card:nth-child(4) { transition-delay: 180ms; }

@media (max-width: 1020px) {
  .hero { min-height: auto; }
  .hero-layout { grid-template-columns: 1fr; }
  .hero-copy { max-width: 760px; }
  .hero-visual { max-width: 760px; }
  .flow-board { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .flow-connector { display: none; }
  .about-layout { gap: 56px; }
  .contact-panel { grid-template-columns: 1fr; }
  .contact-mail { min-width: 0; max-width: 420px; }
}

@media (max-width: 760px) {
  :root { --shell: min(100% - 32px, 680px); }
  .nav-shell { height: 68px; }
  .menu-button {
    width: 42px;
    height: 42px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    border: 0;
    border-radius: 9px;
    background: rgba(255,255,255,.08);
  }
  .menu-button span:not(.sr-only) { width: 21px; height: 2px; background: white; transition: transform 180ms ease, opacity 180ms ease; }
  .menu-button[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-button[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .main-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    padding: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    border: 1px solid rgba(255,255,255,.11);
    border-radius: 14px;
    background: rgba(5,22,40,.98);
    box-shadow: 0 20px 50px rgba(0,0,0,.3);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 11px 10px; }
  .main-nav .nav-contact { border: 0; border-radius: 7px; background: rgba(255,255,255,.06); }
  .hero { padding: 124px 0 72px; }
  .hero-layout { gap: 50px; }
  .hero h1 { font-size: clamp(40px, 12vw, 58px); }
  .hero-summary { font-size: 16px; }
  .hero-metrics { grid-template-columns: 1fr; gap: 16px; }
  .hero-metrics div { padding-bottom: 15px; border-bottom: 1px solid rgba(255,255,255,.08); }
  .visual-frame, .hero-image { min-height: 470px; height: 470px; }
  .signal-card-main { grid-template-columns: auto 1fr; }
  .signal-card-main > b { grid-column: 2; }
  .trust-items { min-height: 56px; justify-content: flex-start; overflow: hidden; gap: 16px; white-space: nowrap; font-size: 12px; }
  .section { padding: 82px 0; }
  .flow-board, .capability-grid, .about-layout { grid-template-columns: 1fr; }
  .flow-step { min-height: 0; }
  .about-layout { gap: 20px; }
  .about-detail { padding-top: 20px; }
  .principles { grid-template-columns: 1fr; }
  .principles div { padding: 18px 0; }
  .principles div + div { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .contact-section { padding-bottom: 82px; }
  .contact-panel { padding: 38px 26px; border-radius: 18px; }
  .contact-mail strong { font-size: 14px; overflow-wrap: anywhere; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}