:root {
  --ink: #061842;
  --ink-soft: #405071;
  --blue: #1557ff;
  --blue-dark: #0b3bc7;
  --blue-pale: #eff5ff;
  --line: #dce5f3;
  --coral: #ff625c;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(17, 69, 170, 0.12);
  --radius: 22px;
  --container: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; display: block; }
.container { width: var(--container); margin-inline: 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; left: 16px; top: -60px; z-index: 100; padding: 12px 18px; background: var(--ink); color: white; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky; top: 0; z-index: 50; height: 76px;
  background: rgba(255, 255, 255, 0.92); border-bottom: 1px solid rgba(220, 229, 243, 0.82);
  backdrop-filter: blur(16px); transition: box-shadow 180ms ease;
}
.site-header.scrolled { box-shadow: 0 8px 30px rgba(6, 24, 66, 0.08); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 780; letter-spacing: -0.025em; font-size: 19px; }
.brand-mark { width: 34px; height: 34px; fill: var(--blue); filter: drop-shadow(0 7px 11px rgba(21, 87, 255, 0.18)); }
.brand-mark-cut { fill: white; }
.site-nav { display: flex; align-items: center; gap: 34px; font-size: 14px; font-weight: 650; }
.site-nav > a:not(.nav-cta) { position: relative; }
.site-nav > a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 2px; background: var(--blue); transition: right 180ms ease; }
.site-nav > a:hover::after, .site-nav > a:focus-visible::after { right: 0; }
.nav-cta { padding: 11px 17px; color: white; background: var(--ink); border-radius: 10px; }
.menu-toggle { display: none; border: 0; background: none; padding: 12px; }

.hero { position: relative; min-height: 650px; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero-contours {
  position: absolute; inset: 0; pointer-events: none; opacity: 0.6;
  background-image: radial-gradient(circle at 72% 44%, rgba(21, 87, 255, 0.07) 0 1px, transparent 1px), linear-gradient(120deg, transparent 56%, rgba(21, 87, 255, 0.03));
  background-size: 22px 22px, 100% 100%;
  mask-image: linear-gradient(90deg, transparent 0 35%, #000 65% 100%);
}
.hero-grid { min-height: 650px; display: grid; grid-template-columns: 0.86fr 1.14fr; gap: 28px; align-items: center; }
.hero-copy { position: relative; z-index: 2; padding-block: 80px; }
.hero-copy h1 { margin: 0; max-width: 620px; font-size: clamp(50px, 6.2vw, 80px); line-height: 0.99; letter-spacing: -0.055em; }
.hero-copy > p:not(.pricing-note) { max-width: 560px; margin: 28px 0 0; font-size: 19px; line-height: 1.75; color: var(--ink-soft); }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; }
.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; padding: 0 24px; border-radius: 12px; font-size: 15px; font-weight: 760; transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, summary:focus-visible, .site-nav a:focus-visible { outline: 3px solid rgba(21, 87, 255, 0.28); outline-offset: 4px; }
.button-primary { color: white; background: var(--blue); box-shadow: 0 14px 32px rgba(21, 87, 255, 0.26); }
.button-primary:hover { background: var(--blue-dark); box-shadow: 0 18px 40px rgba(21, 87, 255, 0.32); }
.button-secondary { color: var(--blue); border: 1px solid var(--blue); background: white; }
.pricing-note { margin: 22px 0 0; color: #72809c; font-size: 13px; }
.network-visual { position: relative; z-index: 1; width: 116%; margin: 0 -9% 0 -4%; filter: drop-shadow(0 28px 32px rgba(21, 87, 255, 0.12)); }

.region-strip { background: #fafcff; border-bottom: 1px solid var(--line); }
.region-list { min-height: 138px; display: grid; grid-template-columns: repeat(3, 1fr) 1.35fr; align-items: center; }
.region-item { min-height: 76px; display: flex; gap: 17px; align-items: center; padding-inline: 24px; border-right: 1px solid var(--line); }
.region-item:first-child { padding-left: 0; }
.region-number { font-variant-numeric: tabular-nums; color: var(--blue); font-size: 12px; font-weight: 800; }
.region-item div { display: flex; flex-direction: column; gap: 5px; }
.region-item strong { font-size: 18px; }
.region-item span:last-child { color: #71809c; font-size: 13px; }
.region-summary { margin: 0; padding-left: 34px; color: var(--ink-soft); font-size: 14px; line-height: 1.6; }

.section { padding: 116px 0; }
.section-heading { max-width: 660px; margin-bottom: 52px; }
.section-heading h2 { margin: 10px 0 16px; font-size: clamp(38px, 4.8vw, 58px); line-height: 1.08; letter-spacing: -0.045em; }
.section-heading > p:last-child { margin: 0; color: var(--ink-soft); line-height: 1.8; }
.section-index { margin: 0; color: var(--blue); font-size: 12px; font-weight: 850; letter-spacing: 0.12em; }
.heading-split { max-width: none; display: grid; grid-template-columns: 1fr 0.72fr; gap: 90px; align-items: end; }
.heading-split > p { padding-bottom: 7px; }

.pilot-plans { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.pilot-plan { min-height: 328px; display: flex; flex-direction: column; justify-content: space-between; padding: 38px; background: white; }
.pilot-plan + .pilot-plan { border-left: 1px solid var(--line); }
.pilot-plan.featured { position: relative; z-index: 1; margin: -10px 0; min-height: 348px; border: 2px solid var(--blue); border-radius: 20px; box-shadow: var(--shadow); }
.pilot-plan.featured + .pilot-plan { border-left: 0; }
.plan-name { margin: 0 0 10px; font-size: 20px; font-weight: 780; }
.price { margin: 0; font-size: 64px; line-height: 1; letter-spacing: -0.06em; font-weight: 820; font-variant-numeric: tabular-nums; }
.price span { margin-right: 4px; font-size: 23px; color: var(--blue); }
.price small { margin-left: 8px; font-size: 15px; font-weight: 650; letter-spacing: 0; color: var(--ink); }
.pilot-plan > p { margin: 32px 0; padding-top: 24px; border-top: 1px solid var(--line); color: var(--ink-soft); }
.pilot-plan a { display: flex; justify-content: space-between; align-items: center; min-height: 48px; color: var(--blue); font-size: 14px; font-weight: 780; border-bottom: 1px solid var(--blue); }
.pilot-plan a::after { content: "→"; font-size: 21px; }
.pilot-plan.featured a { padding: 0 16px; color: white; background: var(--blue); border: 0; border-radius: 10px; }
.pilot-explainer { max-width: 760px; display: flex; align-items: center; gap: 20px; margin: 50px auto 0; padding: 22px 28px; background: var(--blue-pale); border-radius: 14px; }
.pilot-explainer p { margin: 0; font-weight: 650; }
.signal-bars { display: flex; align-items: end; gap: 3px; height: 28px; }
.signal-bars i { display: block; width: 5px; background: var(--blue); border-radius: 4px; }
.signal-bars i:nth-child(1) { height: 8px; } .signal-bars i:nth-child(2) { height: 14px; } .signal-bars i:nth-child(3) { height: 21px; } .signal-bars i:nth-child(4) { height: 28px; }

.formal-plans { background: #fbfdff; border-top: 1px solid var(--line); }
.plan-table { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.annual-plan { padding: 38px 34px 42px; }
.annual-plan + .annual-plan { border-left: 1px solid var(--line); }
.annual-plan.recommended { background: white; box-shadow: 0 18px 60px rgba(17, 69, 170, 0.08); }
.annual-plan header { min-height: 130px; }
.annual-plan h3 { margin: 0 0 24px; font-size: 22px; }
.annual-plan h3 em { display: inline-block; margin-left: 8px; color: var(--coral); font-size: 12px; font-style: normal; vertical-align: 3px; }
.annual-plan .price { color: var(--blue); font-size: 53px; }
.annual-plan ul { list-style: none; margin: 26px 0 0; padding: 0; }
.annual-plan li { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; border-top: 1px solid var(--line); font-size: 13px; }
.annual-plan li strong { font-size: 14px; }
.annual-plan li span { text-align: right; color: #71809c; }

.unlimited { padding: 82px 0; color: white; background: var(--ink); overflow: hidden; }
.unlimited .container { position: relative; }
.unlimited .container::before { content: ""; position: absolute; width: 620px; height: 620px; right: -200px; top: -350px; border: 1px solid rgba(97, 143, 255, 0.24); border-radius: 50%; box-shadow: 0 0 0 80px rgba(21,87,255,0.025), 0 0 0 160px rgba(21,87,255,0.02); }
.unlimited-heading { display: flex; align-items: baseline; gap: 24px; }
.unlimited-heading h2 { margin: 0; font-size: clamp(44px, 6vw, 72px); letter-spacing: -0.05em; }
.unlimited-heading p { margin: 0; color: #bdc9df; }
.speed-plans { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 54px; border-block: 1px solid rgba(255,255,255,0.2); }
.speed-plans article { display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto auto; gap: 8px; padding: 34px 42px; }
.speed-plans article + article { border-left: 1px solid rgba(255,255,255,0.2); }
.speed-plans p { margin: 0; color: #bdc9df; font-weight: 700; }
.speed-plans strong { grid-row: span 2; font-size: 54px; color: #6d98ff; font-variant-numeric: tabular-nums; }
.speed-plans strong small { margin-left: 6px; color: white; font-size: 14px; }
.speed-plans span { color: white; font-size: 18px; font-weight: 750; }
.premium-line { position: relative; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 50px; padding-top: 38px; }
.premium-line div { display: flex; align-items: center; gap: 16px; }
.premium-icon { display: grid; place-items: center; width: 44px; height: 44px; color: var(--coral); border: 1px solid var(--coral); border-radius: 50%; }
.premium-line p { margin: 0; font-size: 20px; }
.premium-line p b { color: var(--coral); font-size: 40px; }
.premium-line > span { color: #bdc9df; text-align: right; }

.clients-grid { display: grid; grid-template-columns: 1fr 0.85fr; gap: 110px; }
.client-list { border-top: 1px solid var(--line); }
.client-list article { display: flex; align-items: center; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.client-icon { display: grid; place-items: center; flex: 0 0 auto; width: 48px; height: 48px; color: var(--blue); background: var(--blue-pale); border-radius: 14px; font-size: 22px; font-weight: 800; }
.client-list h3 { margin: 0 0 5px; font-size: 16px; }
.client-list p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.smart-callout { display: flex; align-items: center; gap: 18px; margin-top: 28px; padding: 22px; border: 1px solid #bfd2ff; border-radius: 14px; background: #f7faff; }
.smart-callout > span { color: var(--blue); font-size: 27px; }
.smart-callout p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.6; }
.smart-callout strong { display: block; color: var(--ink); font-size: 16px; }
.faq .section-heading { margin-bottom: 22px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { position: relative; padding: 25px 38px 25px 0; list-style: none; cursor: pointer; font-weight: 720; line-height: 1.5; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 21px; color: var(--blue); font-size: 25px; font-weight: 400; transition: transform 180ms ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: -4px 0 24px; color: var(--ink-soft); font-size: 14px; line-height: 1.8; }

.final-cta { position: relative; overflow: hidden; padding: 96px 0; text-align: center; color: white; background: linear-gradient(120deg, #061842, #08245f); }
.final-cta::before, .final-cta::after { content: ""; position: absolute; width: 420px; height: 1px; top: 52%; background: rgba(62,118,255,0.6); box-shadow: 0 30px rgba(62,118,255,0.28), 0 -30px rgba(62,118,255,0.2); }
.final-cta::before { left: -190px; transform: rotate(8deg); }
.final-cta::after { right: -190px; transform: rotate(-8deg); }
.final-cta .container { position: relative; z-index: 1; }
.final-cta h2 { margin: 0; font-size: clamp(38px, 5vw, 58px); letter-spacing: -0.04em; }
.final-cta p { max-width: 650px; margin: 20px auto 30px; color: #c4cee1; line-height: 1.7; }
.button-coral { color: white; background: var(--coral); box-shadow: 0 16px 36px rgba(255, 98, 92, 0.24); }
.site-footer { padding: 34px 0; color: white; background: #03102f; }
.site-footer .container { display: flex; align-items: center; justify-content: space-between; }
.footer-brand { font-size: 15px; }
.footer-brand .brand-mark { width: 26px; height: 26px; }
.site-footer p { margin: 0; color: #9eabc4; font-size: 13px; }

@media (max-width: 900px) {
  .menu-toggle { display: grid; gap: 6px; }
  .menu-toggle span:not(.sr-only) { display: block; width: 24px; height: 2px; background: var(--ink); transition: transform 180ms ease; }
  .site-nav { position: fixed; inset: 76px 0 auto; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 22px 20px 30px; background: white; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 15px 8px; }
  .nav-cta { margin-top: 8px; text-align: center; }
  .hero-grid { grid-template-columns: 1fr; padding-top: 42px; }
  .hero-copy { padding: 56px 0 12px; }
  .network-visual { width: 100%; margin: -30px 0 20px; }
  .region-list { grid-template-columns: repeat(3, 1fr); padding: 18px 0; }
  .region-summary { grid-column: 1 / -1; padding: 24px 0 4px; text-align: center; }
  .heading-split { grid-template-columns: 1fr; gap: 18px; }
  .pilot-plan { padding: 28px; }
  .annual-plan { padding-inline: 22px; }
  .clients-grid { grid-template-columns: 1fr; gap: 90px; }
}

@media (max-width: 680px) {
  :root { --container: min(100% - 28px, 1180px); --radius: 16px; }
  .site-header { height: 68px; }
  .site-nav { inset: 68px 0 auto; }
  .hero { min-height: auto; }
  .hero-grid { min-height: auto; }
  .hero-copy h1 { font-size: clamp(44px, 15vw, 62px); }
  .hero-copy > p:not(.pricing-note) { font-size: 17px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .network-visual { width: 112%; margin-inline: -6%; }
  .region-list { grid-template-columns: 1fr; }
  .region-item { padding: 20px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .section { padding: 84px 0; }
  .section-heading { margin-bottom: 38px; }
  .pilot-plans, .plan-table { grid-template-columns: 1fr; }
  .pilot-plan + .pilot-plan, .annual-plan + .annual-plan { border-left: 0; border-top: 1px solid var(--line); }
  .pilot-plan.featured { margin: 0; min-height: 328px; border-radius: 0; }
  .pilot-plan:first-child { border-radius: var(--radius) var(--radius) 0 0; }
  .pilot-plan:last-child { border-radius: 0 0 var(--radius) var(--radius); }
  .pilot-explainer { align-items: flex-start; padding: 20px; }
  .speed-plans { grid-template-columns: 1fr; }
  .speed-plans article + article { border-left: 0; border-top: 1px solid rgba(255,255,255,0.2); }
  .premium-line { grid-template-columns: 1fr auto; gap: 20px; }
  .premium-line > span { grid-column: 1 / -1; text-align: left; }
  .site-footer .container { align-items: flex-start; flex-direction: column; gap: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}