:root {
  --bg: #08090c;
  --panel: #0e1116;
  --panel-soft: #12161d;
  --text: #f0f3f6;
  --muted: #969da8;
  --line: rgba(240, 243, 246, 0.16);
  --line-strong: rgba(240, 243, 246, 0.3);
  --cyan: #7cddff;
  --lime: #bdf64d;
  --orange: #ff805d;
  --max: 1200px;
  --pad: clamp(1.25rem, 4vw, 3.5rem);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 80% 5%, rgba(124, 221, 255, 0.08), transparent 28rem),
    var(--bg);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
::selection { color: #08090c; background: var(--lime); }

.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: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  color: #08090c;
  background: var(--lime);
  transform: translateY(-150%);
  transition: transform 160ms ease;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  width: 100%;
  height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad);
  border-bottom: 1px solid transparent;
  transition: background 220ms ease, border-color 220ms ease, height 220ms ease;
}
.site-header.is-scrolled {
  height: 4.25rem;
  background: rgba(8, 9, 12, 0.9);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 0.8rem; font-weight: 760; letter-spacing: -0.02em; }
.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: #08090c;
  background: var(--lime);
  font: 800 1rem/1 var(--mono);
}
.site-nav { display: flex; align-items: center; gap: clamp(1.2rem, 2.6vw, 2.75rem); font-size: 0.88rem; }
.site-nav a { color: #bdc3ca; transition: color 160ms ease; }
.site-nav a:hover, .site-nav a:focus-visible { color: #fff; }
.site-nav .nav-cta { padding: 0.48rem 0.85rem; color: var(--text); border: 1px solid var(--line-strong); }
.nav-toggle { display: none; }

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(22rem, 0.85fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 7rem);
  max-width: calc(var(--max) + var(--pad) * 2);
  margin: 0 auto;
  padding: 8rem var(--pad) 5.5rem;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.38;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 5rem 5rem;
  mask-image: linear-gradient(to bottom, black, transparent 88%);
}
.hero-copy, .hero-console, .hero-index { position: relative; z-index: 1; }
.eyebrow { display: flex; justify-content: space-between; gap: 1rem; margin: 0 0 2.25rem; color: var(--cyan); font: 0.74rem/1.4 var(--mono); letter-spacing: 0.08em; }
.hero h1 { max-width: 13ch; margin: 0; font-size: clamp(3.2rem, 7.2vw, 6.7rem); line-height: 0.98; letter-spacing: -0.075em; font-weight: 760; }
.hero h1 span { color: var(--lime); }
.hero-intro { max-width: 39rem; margin: 2rem 0 0; color: #b8bec6; font-size: clamp(1.05rem, 1.4vw, 1.22rem); line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2.25rem; }
.button { display: inline-flex; min-height: 3rem; align-items: center; justify-content: space-between; gap: 1.2rem; padding: 0.75rem 1rem; border: 1px solid var(--line-strong); font-size: 0.92rem; font-weight: 680; transition: color 160ms ease, background 160ms ease, border-color 160ms ease, transform 160ms ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #08090c; background: var(--lime); border-color: var(--lime); }
.button-primary:hover { background: #d0ff74; border-color: #d0ff74; }
.button-ghost:hover { color: var(--cyan); border-color: var(--cyan); }
.button:focus-visible, .text-link:focus-visible, .site-nav a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.hero-console { border: 1px solid var(--line-strong); background: rgba(10, 12, 16, 0.8); box-shadow: 1.25rem 1.25rem 0 rgba(124, 221, 255, 0.05); }
.console-head, .console-foot { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.85rem 1rem; font: 0.67rem/1.4 var(--mono); letter-spacing: 0.06em; }
.console-head { border-bottom: 1px solid var(--line); color: #b8bec6; }
.pulse { display: flex; align-items: center; gap: 0.45rem; color: var(--lime); }
.pulse i { width: 0.45rem; height: 0.45rem; border-radius: 50%; background: currentColor; box-shadow: 0 0 0.8rem currentColor; }
.console-body { padding: 1.15rem; }
.console-node { padding: 1rem; border: 1px solid var(--line); background: var(--panel); }
.console-node span, .console-node small { display: block; color: var(--muted); font: 0.65rem/1.4 var(--mono); letter-spacing: 0.08em; }
.console-node strong { display: block; margin-top: 0.35rem; font-size: 0.96rem; font-weight: 650; }
.console-node small { margin-top: 0.65rem; color: var(--cyan); }
.node-core { border-color: rgba(189, 246, 77, 0.5); }
.node-core small { color: var(--lime); }
.console-line { height: 3.25rem; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 0.75rem; padding-left: 1.1rem; }
.console-line span { width: 1px; height: 100%; background: var(--line-strong); }
.console-line b { color: var(--muted); font: 0.62rem/1 var(--mono); }
.console-foot { justify-content: flex-start; flex-wrap: wrap; color: var(--muted); border-top: 1px solid var(--line); }
.console-foot span + span::before { content: "/"; margin-right: 0.6rem; color: var(--line-strong); }
.hero-index { position: absolute; left: var(--pad); right: var(--pad); bottom: 1.5rem; display: flex; justify-content: space-between; color: #747b85; font: 0.67rem/1 var(--mono); letter-spacing: 0.06em; }

.section { max-width: var(--max); margin: 0 auto; padding: clamp(6rem, 11vw, 10rem) var(--pad); border-top: 1px solid var(--line); }
.section-number { margin: 0; color: var(--cyan); font: 0.72rem/1.4 var(--mono); letter-spacing: 0.09em; }
.manifesto { display: grid; grid-template-columns: 0.35fr 1.25fr 0.65fr; align-items: end; gap: 2rem; }
.statement { margin: 0; font-size: clamp(2rem, 4.5vw, 4.4rem); line-height: 1.12; letter-spacing: -0.055em; font-weight: 680; }
.statement.muted { color: #626873; }
.manifesto-note { max-width: 22rem; margin: 0; color: var(--muted); }

.section-heading { display: grid; grid-template-columns: 0.55fr 1.45fr; gap: 2rem; align-items: start; margin-bottom: clamp(3rem, 7vw, 6rem); }
.section-heading h2 { max-width: 13ch; margin: 0; font-size: clamp(2.5rem, 5.4vw, 5.25rem); line-height: 1.04; letter-spacing: -0.06em; }
.service-kicker { margin: 1rem 0 0; color: var(--lime); font-size: 0.86rem; }
.asset-layout { display: grid; grid-template-columns: 0.72fr 1.28fr; gap: clamp(3rem, 8vw, 8rem); }
.asset-copy > p:first-child { max-width: 32rem; margin-top: 0; color: #c5cad0; font-size: 1.14rem; }
.asset-formats { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 2rem 0; }
.asset-formats span { padding: 0.35rem 0.55rem; border: 1px solid var(--line); color: var(--cyan); font: 0.65rem/1 var(--mono); }
.fine-print { color: var(--muted); font-size: 0.86rem; }
.process { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line-strong); }
.process li { display: grid; grid-template-columns: 4rem 1fr; gap: 1.5rem; padding: 1.4rem 0; border-bottom: 1px solid var(--line); }
.process-no { color: var(--orange); font: 0.74rem/1.5 var(--mono); }
.process h3 { margin: 0; font-size: 1.2rem; }
.process p { margin: 0.35rem 0 0; color: var(--muted); }

.router-section { max-width: none; background: #0b0d11; }
.router-section > * { max-width: calc(var(--max) - var(--pad) * 2); margin-left: auto; margin-right: auto; }
.router-map { display: grid; grid-template-columns: 1fr 0.33fr 0.8fr 0.33fr 1.3fr; align-items: stretch; min-height: 15rem; }
.router-client, .router-core, .provider-grid { border: 1px solid var(--line-strong); background: var(--panel); }
.router-client { display: flex; flex-direction: column; justify-content: center; padding: 1.5rem; }
.router-client span, .router-client small, .router-core span, .router-core small { font: 0.67rem/1.5 var(--mono); letter-spacing: 0.06em; }
.router-client span, .router-core span { color: var(--cyan); }
.router-client strong { margin: 0.75rem 0 0.35rem; font-size: 1.08rem; }
.router-client small, .router-core small { color: var(--muted); }
.router-core { display: flex; flex-direction: column; justify-content: center; padding: 1.25rem; border-color: var(--lime); box-shadow: inset 0 0 3rem rgba(189, 246, 77, 0.05); }
.router-core span { color: var(--lime); }
.router-core strong { margin: 1rem 0; font: 700 clamp(1.45rem, 2.5vw, 2.2rem)/1.05 var(--mono); }
.route-track { display: flex; align-items: center; position: relative; overflow: hidden; }
.route-track::before { content: ""; width: 100%; height: 1px; background: var(--line-strong); }
.route-track i { position: absolute; width: 0.35rem; height: 0.35rem; background: var(--lime); animation: packet 2.8s linear infinite; }
.route-track i:nth-child(2) { animation-delay: -0.9s; }
.route-track i:nth-child(3) { animation-delay: -1.8s; }
.route-track-out i { background: var(--cyan); }
@keyframes packet { from { transform: translateX(-0.5rem); } to { transform: translateX(7rem); } }
.provider-grid { display: grid; grid-template-columns: repeat(2, 1fr); }
.provider-grid span { display: grid; place-items: center; min-height: 5rem; padding: 0.75rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); font: 0.78rem/1 var(--mono); }
.provider-grid span:nth-child(even) { border-right: 0; }
.provider-grid span:nth-last-child(-n+2) { border-bottom: 0; }
.router-features { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 1.5rem; border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line); }
.router-features article { min-height: 13rem; padding: 1.25rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.router-features article > span { color: var(--orange); font: 0.68rem/1 var(--mono); }
.router-features h3 { margin: 3rem 0 0.6rem; font-size: 1.12rem; }
.router-features p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.principle-list { border-top: 1px solid var(--line-strong); }
.principle-list article { display: grid; grid-template-columns: 0.25fr 0.75fr 1.25fr; align-items: baseline; gap: 2rem; padding: 1.8rem 0; border-bottom: 1px solid var(--line); }
.principle-list p { color: var(--orange); font: 0.7rem/1 var(--mono); }
.principle-list h3 { margin: 0; font-size: 1.25rem; }
.principle-list span { color: var(--muted); }

.access { display: grid; grid-template-columns: 0.3fr 1fr 0.65fr; gap: 2rem; align-items: end; }
.access h2 { margin: 0; font-size: clamp(2.6rem, 5.4vw, 5.1rem); line-height: 1.04; letter-spacing: -0.06em; }
.access-copy p { max-width: 34rem; margin: 1.5rem 0 0; color: var(--muted); }
.access-links { display: flex; flex-direction: column; align-items: flex-start; gap: 1.25rem; }
.text-link { padding-bottom: 0.15rem; border-bottom: 1px solid var(--line-strong); font-size: 0.88rem; }

.site-footer { max-width: var(--max); margin: 0 auto; padding: 2.5rem var(--pad); display: flex; justify-content: space-between; gap: 2rem; border-top: 1px solid var(--line); }
.footer-brand { display: flex; align-items: center; gap: 0.8rem; }
.footer-brand div { display: flex; flex-direction: column; }
.footer-brand strong { font-size: 0.9rem; }
.footer-brand small, .footer-meta { color: var(--muted); font-size: 0.76rem; }
.footer-meta { display: flex; flex-direction: column; align-items: flex-end; }

.reveal { opacity: 0; transform: translateY(1.5rem); transition: opacity 650ms ease, transform 650ms ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 8.5rem; }
  .hero-console { max-width: 35rem; }
  .hero-index { display: none; }
  .manifesto, .section-heading, .asset-layout, .access { grid-template-columns: 1fr; }
  .manifesto-note { margin-top: 1rem; }
  .section-heading h2 { margin-top: 1rem; }
  .router-map { grid-template-columns: 1fr; gap: 0; }
  .route-track { min-height: 3rem; justify-content: center; }
  .route-track::before { width: 1px; height: 100%; }
  .route-track i { animation: packet-mobile 2.8s linear infinite; }
  @keyframes packet-mobile { from { transform: translateY(-0.5rem); } to { transform: translateY(3.5rem); } }
  .router-features { grid-template-columns: repeat(2, 1fr); }
  .principle-list article { grid-template-columns: 3rem 1fr; }
  .principle-list article span { grid-column: 2; }
}

@media (max-width: 680px) {
  .site-header { height: 4.5rem; }
  .nav-toggle { display: grid; width: 2.7rem; height: 2.7rem; padding: 0.75rem; place-content: center; gap: 0.35rem; color: var(--text); background: transparent; border: 1px solid var(--line-strong); }
  .nav-toggle span:not(.sr-only) { display: block; width: 1.1rem; height: 1px; background: currentColor; transition: transform 160ms ease; }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(0.18rem) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-0.18rem) rotate(-45deg); }
  .site-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; align-items: stretch; flex-direction: column; gap: 0; padding: 0.75rem var(--pad) 1.25rem; background: rgba(8, 9, 12, 0.98); border-bottom: 1px solid var(--line); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 0.85rem 0; border-bottom: 1px solid var(--line); }
  .site-nav .nav-cta { margin-top: 0.75rem; padding: 0.75rem; text-align: center; }
  .hero { min-height: auto; padding-bottom: 5rem; }
  .hero h1 { font-size: clamp(3rem, 15vw, 4.6rem); }
  .eyebrow span:last-child { display: none; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .section { padding-top: 5.5rem; padding-bottom: 5.5rem; }
  .process li { grid-template-columns: 2.5rem 1fr; gap: 0.75rem; }
  .router-features { grid-template-columns: 1fr; }
  .router-features article { min-height: auto; }
  .router-features h3 { margin-top: 1.8rem; }
  .principle-list article { gap: 1rem; }
  .site-footer { align-items: flex-start; flex-direction: column; }
  .footer-meta { align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}