:root {
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --ink: var(--slate-900);
  --ink-muted: var(--slate-500);
  --ink-soft: var(--slate-400);
  --bg: var(--slate-50);
  --panel: #ffffff;
  --line: var(--slate-200);
  --accent: var(--primary-600);
  --accent-strong: var(--primary-700);
  --radius: 12px;
  --header-h: 68px;
  --focus-ring: 0 0 0 3px rgb(14 165 233 / 16%);
  color: var(--ink);
  background: var(--bg);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 16px;
  line-height: 1.55;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 0%, rgb(224 242 254 / 70%), transparent 28rem),
    linear-gradient(135deg, #f8fafc, #eff6ff 55%, #eef2ff);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid rgb(14 165 233 / 35%);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 0 0 10px;
  background: var(--primary-700);
  color: #fff;
  font-size: 13px;
  font-weight: 650;
  transform: translateY(-120%);
  transition: transform 150ms ease;
}

.skip-link:focus {
  transform: translateY(0);
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-h);
  padding: 0 clamp(20px, 4vw, 48px);
  border-bottom: 1px solid rgb(226 232 240 / 90%);
  background: rgb(255 255 255 / 88%);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  width: auto;
  height: 32px;
  object-fit: contain;
}

.login-logo {
  display: block;
  width: min(300px, 88%);
  height: auto;
  margin: 0 0 18px;
}

.contact-logo {
  margin-bottom: 14px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a,
.lang-toggle,
.menu-button {
  padding: 10px 12px;
  color: var(--slate-600);
  font-size: 14px;
  font-weight: 600;
  transition: color 150ms ease;
}

.site-nav a:hover,
.lang-toggle:hover,
.menu-button:hover {
  color: var(--slate-900);
}

.nav-cta {
  margin-left: 8px;
  border-radius: 999px;
  background: var(--primary-600);
  color: #fff !important;
  padding-inline: 16px !important;
}

.nav-cta:hover {
  background: var(--primary-700);
  color: #fff !important;
}

.menu-button {
  display: none;
}

.mobile-nav {
  display: none;
}

.hero {
  position: relative;
  min-height: min(100vh, 900px);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}

.hero-plane {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-plane .topology {
  width: 100%;
  height: 100%;
  opacity: 0.9;
}

.hero-copy {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 40px));
  margin: 0 auto clamp(56px, 10vh, 120px);
  padding: clamp(28px, 5vw, 40px);
  border: 1px solid rgb(226 232 240 / 90%);
  border-radius: 17px;
  background: rgb(255 255 255 / 90%);
  box-shadow: 0 12px 35px rgb(15 23 42 / 4%);
  animation: rise 420ms ease-out both;
}

.hero h1 {
  margin: 0;
  max-width: 16ch;
  color: var(--slate-900);
  font-size: clamp(32px, 5.4vw, 52px);
  font-weight: 750;
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.hero-lead {
  margin: 16px 0 0;
  max-width: 44ch;
  color: var(--slate-500);
  font-size: clamp(16px, 1.8vw, 18px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button-primary,
.button-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 11px;
  font-weight: 700;
  font-size: 14px;
  transition:
    transform 150ms ease,
    background 150ms ease,
    border-color 150ms ease,
    color 150ms ease;
}

.button-primary {
  background: var(--primary-600);
  color: #fff;
}

.button-primary:hover {
  background: var(--primary-700);
  transform: translateY(-1px);
}

.button-ghost {
  border: 1px solid var(--slate-200);
  color: var(--slate-700);
  background: rgb(255 255 255 / 80%);
}

.button-ghost:hover {
  border-color: rgb(14 165 233 / 45%);
  color: var(--primary-700);
}

.section {
  padding: clamp(64px, 10vw, 112px) 0;
}

.section-tight {
  padding-top: clamp(40px, 6vw, 64px);
}

.section-alt {
  border-block: 1px solid var(--slate-200);
  background: rgb(255 255 255 / 55%);
}

.value-strip {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.value-strip li {
  padding: 22px 20px;
  border: 1px solid var(--slate-200);
  border-radius: 14px;
  background: rgb(255 255 255 / 90%);
  box-shadow: 0 8px 24px rgb(15 23 42 / 3%);
}

.value-strip strong {
  display: block;
  margin-bottom: 8px;
  color: var(--slate-900);
  font-size: 17px;
  font-weight: 750;
}

.value-strip span {
  color: var(--slate-500);
  font-size: 14px;
}

.arch-board {
  display: grid;
  grid-template-columns: 1fr auto 1.15fr auto 1fr;
  gap: 14px;
  align-items: stretch;
  margin-top: 36px;
}

.arch-col {
  padding: 20px;
  border: 1px solid var(--slate-200);
  border-radius: 16px;
  background: rgb(255 255 255 / 94%);
  box-shadow: 0 8px 24px rgb(15 23 42 / 3%);
}

.arch-core {
  background: linear-gradient(180deg, #fff, var(--primary-50));
  border-color: rgb(14 165 233 / 28%);
}

.arch-kicker {
  margin: 0 0 8px;
  color: var(--primary-700);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.arch-col h3 {
  margin: 0;
  color: var(--slate-900);
  font-size: 18px;
  font-weight: 750;
}

.arch-col-lead {
  margin: 6px 0 0;
  color: var(--slate-500);
  font-size: 13px;
}

.brand-logos {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.brand-logos li {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--slate-200);
  border-radius: 10px;
  background: #fff;
}

.brand-logos img {
  width: 28px;
  max-width: 28px;
  height: 28px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-logos span {
  color: var(--slate-700);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.2;
}

.arch-arrow {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 6px;
  min-width: 56px;
  color: var(--primary-600);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.arch-arrow::before {
  content: "";
  width: 36px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-500), transparent);
  position: relative;
}

.arch-arrow::after {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: -10px;
  margin-left: 28px;
  border-right: 2px solid var(--primary-500);
  border-top: 2px solid var(--primary-500);
  transform: rotate(45deg);
}

.arch-core-stack {
  display: grid;
  gap: 10px;
  margin-top: 8px;
}

.arch-node {
  display: grid;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--slate-200);
  border-radius: 12px;
  background: #fff;
}

.arch-node-hot {
  border-color: rgb(14 165 233 / 35%);
  background: rgb(240 249 255 / 90%);
}

.arch-mii {
  width: min(160px, 100%);
  height: auto;
  margin-bottom: 6px;
}

.arch-node strong {
  color: var(--slate-900);
  font-size: 15px;
  font-weight: 750;
}

.arch-node span {
  color: var(--slate-500);
  font-size: 12px;
}

.arch-core-link {
  width: 2px;
  height: 16px;
  margin: 0 auto;
  background: linear-gradient(180deg, var(--primary-300, #7dd3fc), var(--primary-500));
}

.proto-note {
  margin: 18px 0 0;
  color: var(--slate-400);
  font-size: 12px;
}

.flow-steps {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--slate-200);
}

.flow-steps li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  padding: 26px 0;
  border-bottom: 1px solid var(--slate-200);
}

.flow-num {
  color: var(--primary-600);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}

.flow-steps strong {
  display: block;
  margin-bottom: 6px;
  color: var(--slate-900);
  font-size: 18px;
  font-weight: 750;
}

.flow-steps p {
  margin: 0;
  max-width: 62ch;
  color: var(--slate-500);
}

.cap-stack {
  margin-top: 40px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--slate-200);
}

.cap-block {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 28px 0;
  border-bottom: 1px solid var(--slate-200);
}

.cap-index {
  color: var(--primary-600);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.cap-block h3 {
  margin: 0 0 8px;
  color: var(--slate-900);
  font-size: 20px;
  font-weight: 750;
}

.cap-block p {
  margin: 0;
  max-width: 64ch;
  color: var(--slate-500);
}

.use-list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--slate-200);
}

.use-list li {
  display: grid;
  grid-template-columns: minmax(200px, 0.38fr) 1fr;
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--slate-200);
}

.use-list strong {
  color: var(--slate-900);
  font-size: 17px;
  font-weight: 750;
}

.use-list span {
  color: var(--slate-500);
}

.faq-list {
  margin-top: 32px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--slate-200);
}

.faq-list details {
  border-bottom: 1px solid var(--slate-200);
  padding: 16px 0;
}

.faq-list summary {
  cursor: pointer;
  color: var(--slate-900);
  font-size: 16px;
  font-weight: 700;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--primary-600);
  font-weight: 700;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  margin: 12px 0 4px;
  max-width: 60ch;
  color: var(--slate-500);
  font-size: 14px;
}

.footer-logo {
  width: auto;
  height: 28px;
  margin-bottom: 12px;
  object-fit: contain;
}

.section-inner {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.section-inner.narrow {
  width: min(760px, calc(100% - 40px));
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--primary-700);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section h2 {
  margin: 0;
  max-width: 20ch;
  color: var(--slate-900);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 750;
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.section-lead {
  margin: 14px 0 0;
  max-width: 54ch;
  color: var(--slate-500);
  font-size: 17px;
}

.topology-board {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 14px;
  align-items: stretch;
  margin-top: 40px;
}

.topo-block {
  padding: 22px 20px;
  border: 1px solid var(--slate-200);
  border-radius: 14px;
  background: rgb(255 255 255 / 92%);
  box-shadow: 0 8px 24px rgb(15 23 42 / 3%);
}

.topo-block span {
  display: block;
  margin-bottom: 8px;
  color: var(--primary-700);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.topo-block strong {
  display: block;
  margin-bottom: 8px;
  color: var(--slate-900);
  font-size: 18px;
  font-weight: 750;
}

.topo-block p {
  margin: 0;
  color: var(--slate-500);
  font-size: 14px;
}

.topo-arrow {
  width: 28px;
  align-self: center;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-500), transparent);
  position: relative;
}

.topo-arrow::after {
  content: "";
  position: absolute;
  right: -2px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--primary-500);
  border-top: 2px solid var(--primary-500);
  transform: translateY(-50%) rotate(45deg);
}

.pilot-steps {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 0;
}

.pilot-steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--slate-200);
  color: var(--slate-500);
}

.pilot-steps li::before {
  content: counter(step, decimal-leading-zero);
  color: var(--primary-600);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.section-contact {
  position: relative;
  overflow: hidden;
}

.section-contact::before {
  content: "";
  position: absolute;
  inset: auto -20% -40% 40%;
  height: 70%;
  background: radial-gradient(circle, rgb(14 165 233 / 12%), transparent 60%);
  pointer-events: none;
}

.fine-print {
  margin: 24px 0 0;
  color: var(--slate-400);
  font-size: 13px;
}

.site-footer {
  border-top: 1px solid var(--slate-200);
  padding: 32px 0 44px;
  background: rgb(255 255 255 / 50%);
}

.footer-inner {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.footer-inner p {
  margin: 8px 0 0;
  color: var(--slate-500);
  font-size: 14px;
}

.footer-meta {
  color: var(--slate-400) !important;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 500ms ease-out,
    transform 500ms ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.draw-line {
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: draw 2.4s cubic-bezier(0.4, 0, 0.2, 1) 0.3s forwards;
}

.draw-line-soft {
  stroke-dasharray: 220;
  stroke-dashoffset: 220;
  animation: drawSoft 1.1s cubic-bezier(0.4, 0, 0.2, 1) 2.2s forwards;
  stroke-opacity: 0.85;
}

.node {
  animation: nodeIn 800ms ease-out both;
}

.node-console {
  animation-delay: 0.45s;
}

.node-site:nth-of-type(2) {
  animation-delay: 0.7s;
}

.node-site:nth-of-type(3) {
  animation-delay: 0.9s;
}

.node-sink {
  animation-delay: 1.15s;
}

.node-sink:nth-of-type(5) {
  animation-delay: 1.25s;
}

.node-sink:nth-of-type(6) {
  animation-delay: 1.35s;
}

.pulse {
  opacity: 0;
  animation: pulseMove 4.8s linear infinite;
}

.p1 {
  animation-delay: 1.4s;
}

.p2 {
  animation-delay: 2.6s;
}

.p3 {
  animation-delay: 3.8s;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes draw {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes drawSoft {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes nodeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes pulseMove {
  0% {
    opacity: 0;
    offset-distance: 0%;
  }
  8% {
    opacity: 1;
  }
  92% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    offset-distance: 100%;
  }
}

.p1,
.p2,
.p3 {
  offset-path: path("M180 240 C320 240, 340 400, 520 400 S760 240, 920 240 S1040 300, 1080 340");
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .draw-line,
  .draw-line-soft {
    stroke-dashoffset: 0;
  }
}

@media (max-width: 960px) {
  .topology-board {
    grid-template-columns: 1fr;
  }

  .topo-arrow {
    width: 2px;
    height: 28px;
    margin: 0 auto;
    background: linear-gradient(180deg, transparent, var(--primary-500), transparent);
  }

  .topo-arrow::after {
    right: 50%;
    top: auto;
    bottom: -2px;
    transform: translateX(50%) rotate(135deg);
  }

  .value-strip {
    grid-template-columns: 1fr;
  }

  .tcp-panel {
    grid-template-columns: 1fr;
  }

  .proto-grid {
    grid-template-columns: 1fr;
  }

  .arch-board {
    grid-template-columns: 1fr;
  }

  .arch-arrow {
    min-height: 40px;
    transform: rotate(90deg);
  }

  .brand-logos {
    grid-template-columns: 1fr 1fr;
  }

  .use-list li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .flow-steps li,
  .cap-block {
    grid-template-columns: 48px 1fr;
  }
}

@media (max-width: 760px) {
  .site-nav {
    display: none;
  }

  .menu-button {
    display: inline-flex;
  }

  .mobile-nav:not([hidden]) {
    display: grid;
    gap: 4px;
    padding: 12px 20px 20px;
    border-bottom: 1px solid var(--slate-200);
    background: rgb(255 255 255 / 96%);
  }

  .mobile-nav a {
    padding: 14px 8px;
    border-bottom: 1px solid var(--slate-200);
    color: var(--slate-600);
    font-weight: 600;
  }

  .hero-copy {
    margin-bottom: 32px;
  }

  .hero h1 {
    max-width: none;
  }
}

@media (min-width: 761px) and (max-width: 1100px) {
  .arch-board {
    grid-template-columns: 1fr;
  }

  .arch-arrow {
    min-height: 36px;
    transform: rotate(90deg);
  }
}

@media (min-width: 1100px) {
  .hero-copy {
    margin-left: clamp(48px, 8vw, 120px);
    margin-right: auto;
  }
}