:root {
  --ink: #f2f5f7;
  --muted: #93a0ad;
  --faint: #607080;
  --line: rgba(183, 213, 228, 0.15);
  --panel: rgba(13, 27, 43, 0.72);
  --panel-strong: #0c1a2b;
  --bg: #07111f;
  --blue: #9cddff;
  --blue-bright: #c8edff;
  --violet: #9c8cff;
  --accent: #b0f3e3;
  --max-width: 1220px;
  --radius: 22px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 75% 8%, rgba(73, 70, 160, 0.2), transparent 28rem),
    radial-gradient(circle at 8% 55%, rgba(30, 101, 135, 0.14), transparent 25rem),
    var(--bg);
  font-family: 'Avenir Next', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  z-index: -3;
  inset: 0;
  background: linear-gradient(115deg, transparent 0 42%, rgba(127, 190, 220, 0.035) 42.2%, transparent 42.4%);
  content: '';
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--bg);
  background: var(--blue-bright);
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-grid {
  position: fixed;
  z-index: -3;
  inset: 0;
  opacity: 0.2;
  background-image: linear-gradient(rgba(154, 205, 227, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(154, 205, 227, 0.035) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
  pointer-events: none;
}

.page-shell { width: min(100% - 56px, var(--max-width)); margin: 0 auto; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 96px;
  border-bottom: 1px solid var(--line);
}

.brand, .footer-brand { display: inline-flex; align-items: center; gap: 11px; font-size: 14px; font-weight: 800; letter-spacing: 0.16em; }
.brand-mark { position: relative; display: inline-flex; align-items: flex-end; gap: 3px; width: 23px; height: 23px; }
.brand-mark span { display: block; width: 5px; background: var(--blue); border-radius: 5px 5px 1px 1px; transform: skew(-24deg); }
.brand-mark span:nth-child(1) { height: 12px; opacity: 0.6; }
.brand-mark span:nth-child(2) { height: 19px; }
.brand-mark span:nth-child(3) { height: 15px; opacity: 0.75; }
.brand-mark.small { width: 18px; height: 18px; gap: 2px; }
.brand-mark.small span { width: 4px; }
.brand-mark.small span:nth-child(1) { height: 9px; }
.brand-mark.small span:nth-child(2) { height: 15px; }
.brand-mark.small span:nth-child(3) { height: 12px; }

.site-nav { display: flex; align-items: center; gap: 34px; color: var(--muted); font-size: 13px; font-weight: 600; }
.site-nav a { transition: color 180ms ease; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--ink); }
.nav-cta { display: inline-flex; gap: 11px; align-items: center; padding: 12px 16px; color: var(--ink); border: 1px solid var(--line); border-radius: 99px; }
.nav-cta span { color: var(--blue); font-size: 16px; }
.menu-toggle { display: none; }

.section-wrap { width: 100%; }
.hero { display: grid; grid-template-columns: minmax(0, 0.96fr) minmax(420px, 1.04fr); gap: 70px; align-items: center; min-height: 660px; padding: 92px 0 105px; }
.eyebrow { margin: 0 0 25px; color: var(--muted); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 10px; letter-spacing: 0.14em; line-height: 1.4; }
.eyebrow-dot, .pulse-dot { display: inline-block; width: 7px; height: 7px; margin-right: 8px; vertical-align: 1px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 14px var(--accent); }
.hero h1, h2 { margin: 0; color: var(--ink); font-size: clamp(3.5rem, 7vw, 6.35rem); font-weight: 700; letter-spacing: -0.075em; line-height: 0.99; }
h1 em, h2 em { color: var(--blue); font-style: normal; }
.hero-lede { max-width: 480px; margin: 32px 0 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 27px; margin-top: 38px; }
.button { display: inline-flex; align-items: center; gap: 20px; padding: 15px 20px; border-radius: 8px; font-size: 13px; font-weight: 700; transition: transform 180ms ease, background 180ms ease; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { color: #07111f; background: var(--blue-bright); }
.button-primary span { color: #31586e; font-size: 18px; }
.text-link { display: inline-flex; align-items: center; gap: 12px; color: var(--muted); font-size: 12px; font-weight: 700; transition: color 180ms ease; }
.text-link span { color: var(--blue); font-size: 16px; }
.text-link:hover, .text-link:focus-visible { color: var(--ink); }
.hero-note { margin: 68px 0 0; color: var(--faint); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 10px; letter-spacing: 0.06em; }

.hero-visual { position: relative; min-height: 470px; display: grid; place-items: center; }
.visual-orbit { position: absolute; width: 390px; height: 390px; border: 1px solid rgba(156, 221, 255, 0.19); border-radius: 50%; transform: rotate(-25deg) skew(10deg); }
.visual-orbit::after { position: absolute; top: -5px; left: 50%; width: 9px; height: 9px; background: var(--blue); border-radius: 50%; box-shadow: 0 0 24px 4px rgba(156, 221, 255, 0.65); content: ''; }
.visual-orbit-one { transform: rotate(-28deg) skew(9deg); }
.visual-orbit-two { width: 280px; height: 480px; border-color: rgba(156, 140, 255, 0.17); transform: rotate(54deg) skew(-12deg); }
.visual-orbit-two::after { top: 50%; left: auto; right: -5px; background: var(--violet); box-shadow: 0 0 24px 4px rgba(156, 140, 255, 0.55); }
.visual-core { position: relative; z-index: 1; display: grid; place-items: center; width: 140px; height: 140px; border: 1px solid rgba(200, 237, 255, 0.7); border-radius: 50%; background: radial-gradient(circle at 35% 30%, rgba(192, 235, 255, 0.42), rgba(48, 101, 134, 0.17) 35%, rgba(9, 22, 38, 0.9) 70%); box-shadow: 0 0 75px rgba(88, 173, 220, 0.24), inset 0 0 34px rgba(166, 229, 255, 0.1); }
.visual-core::before { position: absolute; inset: 11px; border: 1px solid rgba(200, 237, 255, 0.22); border-radius: 50%; content: ''; }
.visual-core span { color: var(--blue-bright); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 17px; letter-spacing: 0.12em; }
.runtime-card { position: absolute; z-index: 2; right: 0; bottom: 8px; width: min(100%, 312px); padding: 22px; background: linear-gradient(135deg, rgba(16, 38, 57, 0.93), rgba(8, 19, 33, 0.95)); border: 1px solid rgba(177, 216, 235, 0.2); border-radius: 15px; box-shadow: 0 20px 55px rgba(0, 0, 0, 0.25); }
.runtime-topline, .runtime-footer { display: flex; align-items: center; justify-content: space-between; color: var(--faint); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 9px; letter-spacing: 0.1em; }
.runtime-signal { color: var(--accent); }
.runtime-signal .pulse-dot { width: 5px; height: 5px; margin-right: 4px; }
.runtime-heading { margin-top: 66px; color: var(--blue-bright); font-size: 27px; font-weight: 700; letter-spacing: -0.05em; }
.runtime-copy { margin-top: 5px; color: var(--muted); font-size: 11px; }
.runtime-footer { margin-top: 33px; }
.runtime-line { display: block; width: 68px; height: 1px; margin: 0 9px; background: linear-gradient(90deg, var(--blue), transparent); }

.signal-strip { display: grid; grid-template-columns: repeat(3, 1fr) auto; gap: 20px; padding: 18px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 10px; letter-spacing: 0.08em; }
.signal-strip div { display: flex; align-items: center; gap: 14px; }
.signal-strip div span { color: var(--blue); }
.signal-strip-end { justify-content: flex-end; color: var(--faint) !important; }
.signal-strip-end span { color: var(--violet) !important; font-size: 16px; }

.section-block { padding: 150px 0; }
.section-heading { display: grid; grid-template-columns: 0.38fr 1fr; gap: 40px; }
.section-heading h2, .principles h2, .about h2 { font-size: clamp(2.8rem, 5vw, 4.8rem); }
.section-heading > div > p { max-width: 360px; margin: 28px 0 0; color: var(--muted); font-size: 14px; }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 72px; }
.service-card { min-height: 380px; padding: 25px; background: linear-gradient(150deg, rgba(17, 38, 56, 0.62), rgba(9, 20, 34, 0.45)); border: 1px solid var(--line); border-radius: var(--radius); transition: border-color 220ms ease, transform 220ms ease; }
.service-card:hover { border-color: rgba(156, 221, 255, 0.4); transform: translateY(-5px); }
.service-card-featured { background: linear-gradient(145deg, rgba(40, 65, 83, 0.7), rgba(34, 24, 70, 0.36)); }
.card-index { color: var(--faint); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 10px; }
.card-icon { display: grid; place-items: center; width: 53px; height: 53px; margin-top: 66px; color: var(--blue); border: 1px solid rgba(156, 221, 255, 0.35); border-radius: 50%; font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 23px; }
.card-icon-cross { color: var(--accent); }
.card-icon-slash { color: var(--violet); font-size: 16px; }
.service-card h3 { margin: 24px 0 9px; font-size: 22px; letter-spacing: -0.045em; }
.service-card p { min-height: 52px; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
.service-link { display: inline-flex; align-items: center; gap: 16px; padding: 0; margin-top: 27px; color: var(--blue); background: transparent; border: 0; font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 10px; cursor: pointer; }
.service-link span { font-size: 16px; }
.service-link:hover, .service-link:focus-visible { color: var(--blue-bright); }
.coming-soon-message { min-height: 22px; margin: 19px 0 0; color: var(--accent); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 10px; }

.principles { display: grid; grid-template-columns: 0.75fr 1.25fr; gap: 90px; border-top: 1px solid var(--line); }
.principles-intro .eyebrow, .about-copy .eyebrow { margin-bottom: 42px; }
.principles-list { border-top: 1px solid var(--line); }
.principle-row { display: grid; grid-template-columns: 42px 1fr 25px; gap: 20px; align-items: start; padding: 30px 0; border-bottom: 1px solid var(--line); }
.principle-number { color: var(--blue); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 11px; }
.principle-row h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: -0.03em; }
.principle-row p { max-width: 410px; margin: 0; color: var(--muted); font-size: 12px; }
.principle-arrow { color: var(--faint); font-size: 19px; }

.about { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 90px; align-items: center; border-top: 1px solid var(--line); }
.about-mark { display: grid; place-items: center; width: min(100%, 360px); aspect-ratio: 1; color: rgba(156, 221, 255, 0.1); border: 1px solid rgba(156, 221, 255, 0.17); border-radius: 50%; font-size: clamp(4rem, 8vw, 8rem); font-weight: 800; letter-spacing: -0.12em; transform: rotate(-14deg); }
.about-mark span { color: rgba(156, 140, 255, 0.32); font-size: 0.55em; transform: translate(-7px, 35px); }
.about-copy h2 { color: var(--ink); }
.about-copy > p:not(.eyebrow) { max-width: 460px; margin: 30px 0 27px; color: var(--muted); font-size: 14px; line-height: 1.9; }

.site-footer { display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; min-height: 92px; border-top: 1px solid var(--line); color: var(--faint); font-family: 'Consolas', 'SFMono-Regular', monospace; font-size: 9px; letter-spacing: 0.06em; }
.site-footer p:nth-child(2) { justify-self: center; }
.site-footer p:last-child { justify-self: end; }

:focus-visible { outline: 2px solid var(--blue); outline-offset: 5px; }

@media (max-width: 860px) {
  .page-shell { width: min(100% - 38px, var(--max-width)); }
  .hero { grid-template-columns: 1fr; gap: 20px; padding-top: 75px; }
  .hero-copy { max-width: 680px; }
  .hero-visual { min-height: 400px; }
  .section-heading, .principles, .about { grid-template-columns: 1fr; gap: 55px; }
  .section-block { padding: 105px 0; }
  .principles-intro .eyebrow, .about-copy .eyebrow { margin-bottom: 25px; }
  .about-mark { width: min(100%, 250px); justify-self: center; }
}

@media (max-width: 640px) {
  .page-shell { width: min(100% - 28px, var(--max-width)); }
  .site-header { min-height: 78px; }
  .menu-toggle { z-index: 3; display: grid; gap: 6px; width: 42px; height: 42px; place-content: center; color: var(--ink); background: transparent; border: 1px solid var(--line); border-radius: 50%; cursor: pointer; }
  .menu-toggle span { display: block; width: 16px; height: 1px; background: currentColor; transition: transform 180ms ease; }
  .menu-toggle[aria-expanded='true'] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-toggle[aria-expanded='true'] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .site-nav { position: absolute; z-index: 2; top: 70px; right: 14px; left: 14px; display: grid; gap: 0; padding: 8px; background: rgba(8, 20, 34, 0.97); border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3); opacity: 0; pointer-events: none; transform: translateY(-8px); transition: opacity 180ms ease, transform 180ms ease; }
  .site-nav.is-open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .site-nav a { padding: 14px; border-radius: 9px; }
  .site-nav a:hover, .site-nav a:focus-visible { background: rgba(156, 221, 255, 0.08); }
  .nav-cta { justify-content: space-between; margin-top: 5px; }
  .hero { min-height: auto; padding: 70px 0 75px; }
  .hero h1 { font-size: clamp(3.1rem, 16vw, 5.1rem); }
  .hero-lede { margin-top: 25px; font-size: 14px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 23px; }
  .hero-note { margin-top: 50px; }
  .hero-visual { min-height: 330px; margin-top: 30px; }
  .visual-orbit { width: 270px; height: 270px; }
  .visual-orbit-two { width: 210px; height: 340px; }
  .visual-core { width: 105px; height: 105px; }
  .runtime-card { right: 0; bottom: -4px; width: min(100%, 275px); padding: 17px; }
  .runtime-heading { margin-top: 48px; font-size: 23px; }
  .signal-strip { grid-template-columns: 1fr 1fr; gap: 12px 16px; padding: 17px 0; line-height: 1.5; }
  .signal-strip-end { grid-column: 1 / -1; justify-content: flex-start !important; }
  .section-block { padding: 88px 0; }
  .section-heading h2, .principles h2, .about h2 { font-size: clamp(2.75rem, 13vw, 4rem); }
  .service-grid { grid-template-columns: 1fr; gap: 12px; margin-top: 48px; }
  .service-card { min-height: 305px; }
  .card-icon { margin-top: 42px; }
  .principles { gap: 44px; }
  .principle-row { grid-template-columns: 27px 1fr 20px; gap: 12px; padding: 23px 0; }
  .about { gap: 50px; }
  .site-footer { grid-template-columns: 1fr; gap: 16px; padding: 27px 0; }
  .site-footer p:nth-child(2), .site-footer p:last-child { justify-self: start; margin: 0; }
}

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