@font-face {
  font-family: "Flow7 Geologica";
  src: url("./assets/fonts/Geologica-Variable.woff2") format("woff2-variations");
  font-style: oblique 0deg 12deg;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --field: #08090b;
  --field-deep: #050608;
  --surface: #101317;
  --surface-raised: #161a1f;
  --ink: #f4eee7;
  --ink-soft: #cbc5be;
  --ink-muted: #928f8b;
  --line: rgb(244 238 231 / 14%);
  --line-strong: rgb(244 238 231 / 25%);
  --paper: #efebe4;
  --paper-deep: #e5dfd7;
  --paper-surface: #f8f5ef;
  --paper-ink: #171719;
  --paper-soft: #454244;
  --paper-muted: #706c69;
  --paper-line: rgb(23 23 25 / 14%);
  --tech-field: #1d2d3a;
  --tech-signal: #7db5da;
  --ring: #f4eae0;
  --ring-edge: #b4947a;
  --phase: #d4ae89;
  --focus: #e2b98f;
  --font: "Flow7 Geologica", "Geologica", "Helvetica Neue", Arial, system-ui, sans-serif;
  --mono: "SFMono-Regular", "SF Mono", "Roboto Mono", ui-monospace, monospace;
  --space-1: 7px;
  --space-2: 14px;
  --space-3: 21px;
  --space-4: 28px;
  --space-5: 42px;
  --space-6: 56px;
  --space-7: 84px;
  --space-8: 112px;
  --space-9: 140px;
  --gutter: clamp(21px, 4vw, 56px);
  --content: 104rem;
  --radius-sm: 7px;
  --radius: 14px;
  --radius-lg: 21px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-calm: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--field);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  color: var(--ink);
  background: var(--field);
  font-family: var(--font);
  font-variation-settings: "SHRP" 48, "CRSV" 0, "slnt" 0, "wght" 380;
  line-height: 1.62;
  letter-spacing: -0.008em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

html[lang^="zh"] body {
  font-family: "Flow7 Geologica", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

::selection {
  color: var(--field);
  background: var(--tech-signal);
}

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

button,
input,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

code {
  font-family: var(--mono);
  font-size: 0.92em;
  font-variant-numeric: tabular-nums;
}

h1,
h2,
h3,
p,
dl,
dd,
ol,
ul {
  margin-top: 0;
}

h1,
h2,
h3 {
  margin-bottom: 0;
  font-variation-settings: "SHRP" 34, "CRSV" 0, "slnt" 0, "wght" 300;
  letter-spacing: -0.045em;
}

:focus {
  outline: 0;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: var(--field);
  background: var(--ring);
  transform: translateY(-180%);
  transition: transform 180ms var(--ease);
}

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

.section-shell,
.header-shell {
  width: min(100%, var(--content));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section-pad {
  padding-block: clamp(var(--space-7), 11vw, 168px);
  scroll-margin-top: 84px;
}

.eyebrow,
.micro-label,
.contract-index,
.router-head,
.route-endpoint small,
.capability-ledger small,
.brand-copy small,
.footer-brand small {
  font-variation-settings: "SHRP" 72, "CRSV" 0, "slnt" 0, "wght" 540;
  font-size: 0.6875rem;
  line-height: 1.3;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  color: var(--tech-signal);
}

.eyebrow::before {
  width: var(--space-4);
  height: 1px;
  background: currentColor;
  content: "";
}

.dark-label {
  color: #86552f;
}

.quiet-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border-bottom: 1px solid currentColor;
  font-variation-settings: "SHRP" 62, "CRSV" 0, "slnt" 0, "wght" 470;
  font-size: 0.875rem;
  transition: gap 220ms var(--ease), color 220ms var(--ease);
}

.quiet-link span {
  color: var(--phase);
}

/* Header */

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  border-bottom: 1px solid transparent;
  color: var(--ink);
  transition: background-color 420ms var(--ease-calm), border-color 420ms var(--ease-calm), backdrop-filter 420ms var(--ease-calm);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgb(8 9 11 / 84%);
  backdrop-filter: blur(18px) saturate(120%);
}

.header-shell {
  min-height: 84px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
}

.brand-lockup,
.footer-brand {
  width: max-content;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.brand-lockup > img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong,
.footer-brand strong {
  font-variation-settings: "SHRP" 50, "CRSV" 0, "slnt" 0, "wght" 450;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.brand-copy small,
.footer-brand small {
  color: var(--ink-muted);
  font-size: 0.54rem;
  letter-spacing: 0.22em;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-3), 3vw, var(--space-6));
}

.primary-nav a,
.header-actions a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--ink-soft);
  font-variation-settings: "SHRP" 62, "CRSV" 0, "slnt" 0, "wght" 470;
  font-size: 0.75rem;
  transition: color 180ms var(--ease-calm);
}

.header-actions {
  display: flex;
  justify-self: end;
  align-items: center;
  gap: var(--space-3);
}

.header-actions .header-cta {
  gap: var(--space-1);
  padding-inline: var(--space-3);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
}

.header-cta span {
  color: var(--phase);
}

/* Hero */

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background: var(--field-deep);
}

.hero-image,
.hero-veil {
  position: absolute;
  z-index: -3;
  inset: 0;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 66% center;
  filter: saturate(0.88) contrast(1.04) brightness(0.72);
}

.hero-veil {
  z-index: -2;
  background:
    linear-gradient(90deg, #08090b 0%, rgb(8 9 11 / 98%) 34%, rgb(8 9 11 / 68%) 65%, rgb(8 9 11 / 18%) 100%),
    linear-gradient(180deg, rgb(8 9 11 / 34%) 0%, transparent 45%, #08090b 100%);
}

.hero::after {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(90deg, transparent calc(50% - 1px), rgb(244 238 231 / 6%) 50%, transparent calc(50% + 1px));
  content: "";
  pointer-events: none;
}

.hero-grid {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.72fr);
  align-items: center;
  gap: clamp(var(--space-6), 8vw, var(--space-9));
  padding-top: 126px;
  padding-bottom: var(--space-8);
}

.hero-copy {
  max-width: 58rem;
}

.hero h1 {
  display: grid;
  margin: 0;
  font-size: clamp(4.1rem, 8.5vw, 9.4rem);
  line-height: 0.84;
  text-wrap: balance;
}

.hero h1 span:nth-child(2) {
  color: var(--ring);
}

.hero h1 span:nth-child(3) {
  color: var(--tech-signal);
}

.hero-lede {
  max-width: 42rem;
  margin: var(--space-5) 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.45vw, 1.25rem);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.command-control {
  min-width: min(100%, 31rem);
  min-height: 56px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-1) var(--space-1) var(--space-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: rgb(8 9 11 / 64%);
  backdrop-filter: blur(12px);
}

.command-control > span {
  color: var(--tech-signal);
  font-family: var(--mono);
}

.command-control code {
  min-width: 0;
  overflow: hidden;
  color: var(--ring);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.command-control button {
  min-width: 66px;
  min-height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  color: var(--field);
  background: var(--ring);
  cursor: pointer;
  font-variation-settings: "SHRP" 65, "CRSV" 0, "slnt" 0, "wght" 510;
  font-size: 0.75rem;
  transition: transform 180ms var(--ease), background-color 180ms var(--ease-calm);
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: var(--space-5) 0 0;
  padding: var(--space-4) 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  color: var(--ink-muted);
  font-size: 0.75rem;
}

.hero-proof li {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.hero-proof span {
  color: var(--tech-signal);
  font-family: var(--mono);
  font-size: 0.64rem;
}

.hero-instrument {
  position: relative;
  min-height: 38rem;
  display: grid;
  place-items: center;
  align-self: stretch;
}

.hero-mark {
  width: min(100%, 34rem);
  aspect-ratio: 1;
  object-fit: contain;
  filter: drop-shadow(0 0 28px rgb(244 234 224 / 12%));
  animation: mark-awaken 4200ms var(--ease-calm) infinite alternate;
}

.instrument-readout {
  position: absolute;
  right: 0;
  bottom: 8%;
  width: min(100%, 21rem);
  padding: var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgb(8 9 11 / 72%);
  backdrop-filter: blur(16px);
}

.instrument-readout > p {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
  color: var(--ring);
  font-variation-settings: "SHRP" 62, "CRSV" 0, "slnt" 0, "wght" 470;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.live-dot,
.router-head i,
.step-proof i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--tech-signal);
  box-shadow: 0 0 14px rgb(125 181 218 / 72%);
}

.instrument-readout dl {
  margin: 0;
}

.instrument-readout dl div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-2);
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
}

.instrument-readout dt {
  color: var(--ink-muted);
}

.instrument-readout dd {
  margin: 0;
  color: var(--ink-soft);
}

.hero-foot {
  position: absolute;
  right: 0;
  bottom: var(--space-3);
  left: 0;
  display: flex;
  justify-content: space-between;
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
}

/* Shared section heading */

.section-heading {
  max-width: 72rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.42fr);
  align-items: end;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}

.section-heading .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: calc(var(--space-4) * -1);
}

.section-heading h2,
.routing-copy h2,
.safety-copy h2,
.faq-heading h2,
.final-layout h2 {
  font-size: clamp(3rem, 6.4vw, 6.8rem);
  line-height: 0.94;
}

.section-heading > p,
.routing-copy > p,
.safety-copy > p,
.final-layout > div > p:last-child {
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.35vw, 1.25rem);
}

/* System / daylight */

.system {
  color: var(--paper-ink);
  background: var(--paper);
}

.system .section-heading > p {
  color: var(--paper-soft);
}

.contract-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.contract-grid article {
  min-height: 25rem;
  display: flex;
  flex-direction: column;
  padding: var(--space-4) var(--space-5) var(--space-5) 0;
}

.contract-grid article + article {
  padding-left: var(--space-5);
  border-left: 1px solid var(--paper-line);
}

.contract-index {
  color: #86552f;
}

.contract-grid h3 {
  max-width: 12ch;
  margin-top: auto;
  font-size: clamp(1.75rem, 3vw, 3.2rem);
  line-height: 1.04;
}

.contract-grid p {
  max-width: 34rem;
  margin: var(--space-3) 0 0;
  color: var(--paper-soft);
}

/* Flow */

.flow {
  background:
    radial-gradient(circle at 88% 20%, rgb(29 45 58 / 54%), transparent 32rem),
    var(--field);
}

.split-heading {
  grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.46fr);
}

.split-heading > div .eyebrow {
  margin-bottom: var(--space-4);
}

.split-heading > div h2 {
  font-size: clamp(3rem, 6.4vw, 6.8rem);
  line-height: 0.94;
}

.split-heading > p {
  align-self: end;
}

.flow-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.flow-list li {
  display: grid;
  grid-template-columns: 56px minmax(16rem, 0.7fr) minmax(20rem, 1fr) minmax(14rem, 0.58fr);
  align-items: center;
  gap: var(--space-4);
  min-height: 12rem;
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--line);
}

.step-number {
  color: var(--tech-signal);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.micro-label {
  margin-bottom: var(--space-1);
  color: var(--ink-muted);
  font-size: 0.62rem;
}

.flow-list h3 {
  font-size: clamp(1.5rem, 2.5vw, 2.7rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.flow-list > li > p {
  margin: 0;
  color: var(--ink-soft);
}

.step-proof {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ring);
  background: rgb(255 255 255 / 2%);
  font-size: 0.75rem;
}

.step-proof > span:last-child {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--tech-signal);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.model-compat {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding: var(--space-4);
  border: 1px solid rgb(105 185 230 / 34%);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgb(105 185 230 / 12%), rgb(255 255 255 / 2%) 62%);
}

.model-compat > span {
  color: var(--tech-signal);
  font-family: var(--mono);
  font-size: .65rem;
  letter-spacing: .13em;
}

.model-compat strong {
  color: var(--ring);
  font-size: 1rem;
  font-variation-settings: "SHRP" 60, "CRSV" 0, "slnt" 0, "wght" 590;
}

.model-compat p {
  max-width: 58rem;
  margin: .35rem 0 0;
  color: var(--ink-soft);
  font-size: .82rem;
}

.model-compat > i {
  color: var(--tech-signal);
  font-size: 1.4rem;
  font-style: normal;
}

.path-proof {
  justify-content: flex-start;
}

.path-proof b {
  color: var(--ink-muted);
  font-weight: 400;
}

.folder-glyph {
  position: relative;
  width: 24px;
  height: 17px;
  border: 1px solid var(--tech-signal);
  border-radius: 2px;
}

.folder-glyph::before {
  position: absolute;
  bottom: 100%;
  left: -1px;
  width: 10px;
  height: 4px;
  border: 1px solid var(--tech-signal);
  border-bottom: 0;
  border-radius: 2px 2px 0 0;
  content: "";
}

/* Router */

.routing {
  background: var(--surface);
}

.routing-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.54fr) minmax(34rem, 1fr);
  align-items: center;
  gap: clamp(var(--space-7), 9vw, var(--space-9));
}

.routing-copy .eyebrow,
.safety-copy .eyebrow,
.faq-heading .eyebrow,
.final-layout .eyebrow {
  margin-bottom: var(--space-4);
}

.routing-copy h2 {
  font-size: clamp(2.8rem, 5.8vw, 6rem);
}

.routing-copy > p {
  margin-top: var(--space-4);
}

.routing-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: var(--space-6);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.routing-metrics div {
  padding-block: var(--space-3);
}

.routing-metrics div + div {
  padding-left: var(--space-3);
  border-left: 1px solid var(--line);
}

.routing-metrics strong,
.routing-metrics span {
  display: block;
}

.routing-metrics strong {
  color: var(--ring);
  font-size: 1.75rem;
  font-weight: 300;
}

.routing-metrics span {
  color: var(--ink-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.router {
  --session-accent: var(--tech-signal);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--field-deep);
  box-shadow: 0 21px 70px rgb(0 0 0 / 24%);
  transition: border-color 420ms var(--ease-calm);
}

.router-head,
.router-foot {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-inline: var(--space-3);
  border-bottom: 1px solid var(--line);
  color: var(--ink-muted);
}

.router-head span:last-child {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--tech-signal);
}

.session-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}

.session-tabs button {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 0;
  border-right: 1px solid var(--line);
  color: var(--ink-muted);
  background: transparent;
  cursor: pointer;
  font-size: 0.75rem;
  transition: color 220ms var(--ease-calm), background-color 220ms var(--ease-calm);
}

.session-tabs button:last-child {
  border-right: 0;
}

.session-tabs button span {
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 0.62rem;
}

.session-tabs button.is-active {
  color: var(--ring);
  background: rgb(125 181 218 / 8%);
  box-shadow: inset 0 -1px var(--session-accent);
}

.session-tabs button.is-active span {
  color: var(--session-accent);
}

.route-field {
  min-height: 31rem;
  display: grid;
  grid-template-columns: minmax(9rem, 1fr) minmax(4rem, 0.56fr) 7rem minmax(4rem, 0.56fr) minmax(9rem, 1fr);
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-6) var(--space-4);
  background:
    linear-gradient(rgb(244 238 231 / 3%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(244 238 231 / 3%) 1px, transparent 1px);
  background-size: 56px 56px;
}

.route-endpoint {
  min-width: 0;
}

.route-endpoint small {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--ink-muted);
  font-size: 0.56rem;
}

.route-endpoint strong,
.route-endpoint code {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.route-endpoint strong {
  color: var(--ring);
  font-size: 1rem;
  font-weight: 420;
}

.route-endpoint code {
  margin-top: 4px;
  color: var(--ink-muted);
  font-size: 0.65rem;
}

.project-endpoint {
  text-align: right;
}

.route-core {
  width: 7rem;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  align-content: center;
  gap: var(--space-1);
  border: 1px solid var(--ring-edge);
  border-radius: 50%;
  color: var(--field);
  background: radial-gradient(circle, var(--ring), #cfc0b2 72%, #9b7b62);
  box-shadow: 0 0 28px rgb(244 234 224 / 16%);
}

.route-core b {
  font-family: var(--mono);
  font-size: 1.1rem;
}

.route-core span {
  max-width: 5rem;
  color: rgb(8 9 11 / 64%);
  font-size: 0.52rem;
  line-height: 1.2;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.route-path {
  position: relative;
  height: 1px;
  background: var(--line-strong);
}

.route-path span {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, var(--session-accent));
  transform-origin: left;
  transition: background 420ms var(--ease-calm);
}

.route-path i {
  position: absolute;
  top: 50%;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--session-accent);
  box-shadow: 0 0 12px var(--session-accent);
  transform: translate(-50%, -50%);
  animation: route-travel 1200ms var(--ease) infinite;
}

.route-path.outbound span {
  background: linear-gradient(90deg, var(--session-accent), transparent);
}

.router-foot {
  justify-content: flex-start;
  border-top: 1px solid var(--line);
  border-bottom: 0;
  background: rgb(255 255 255 / 2%);
}

.router-foot > span {
  color: var(--session-accent);
}

.router-foot code {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  color: var(--ink-soft);
  font-size: 0.68rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.router-foot b {
  color: var(--session-accent);
}

/* Local companion / daylight */

.companion {
  color: var(--paper-ink);
  background: var(--paper-deep);
}

.companion-heading {
  max-width: none;
  grid-template-columns: minmax(0, 1.15fr) minmax(22rem, .55fr);
}

.companion-heading > div .eyebrow {
  margin-bottom: var(--space-4);
}

.companion-heading h2 {
  font-size: clamp(3rem, 6.4vw, 6.8rem);
  line-height: .92;
}

.companion-heading > p {
  align-self: end;
  margin: 0;
  color: var(--paper-soft);
  font-size: clamp(1rem, 1.35vw, 1.25rem);
}

.companion-frame {
  min-height: 46rem;
  overflow: hidden;
  display: grid;
  grid-template-columns: 15.75rem minmax(0, 1fr);
  background: var(--paper);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-lg);
  box-shadow: 0 35px 100px rgb(42 33 27 / 16%);
}

.companion-rail {
  display: flex;
  flex-direction: column;
  padding: var(--space-3);
  color: var(--ink);
  background: var(--field);
  border-right: 1px solid var(--line);
}

.companion-lockup {
  min-height: 63px;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.companion-lockup img {
  width: 49px;
  height: 49px;
  object-fit: contain;
}

.companion-lockup span,
.companion-lockup strong,
.companion-lockup small {
  display: block;
}

.companion-lockup strong {
  font-weight: 430;
  letter-spacing: -.035em;
}

.companion-lockup small,
.companion-rail > small {
  color: var(--ink-muted);
  font-size: .6rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.companion-ready {
  min-height: 56px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: var(--space-5) 0 var(--space-3);
  padding: var(--space-2);
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: .7rem;
}

.companion-ready i {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--tech-signal);
  box-shadow: 0 0 0 6px rgb(125 181 218 / 9%);
}

.companion-rail ol {
  display: grid;
  gap: 3px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.companion-rail li {
  min-height: 49px;
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  gap: var(--space-1);
  padding: 0 var(--space-2);
  color: var(--ink-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: .75rem;
}

.companion-rail li span {
  font-family: var(--mono);
  font-size: .58rem;
}

.companion-rail li.is-active {
  color: var(--ring);
  background: rgb(125 181 218 / 9%);
  border-color: rgb(125 181 218 / 20%);
}

.companion-rail li.is-active span { color: var(--tech-signal); }
.companion-rail > small { margin-top: auto; padding-top: var(--space-4); border-top: 1px solid var(--line); }
.companion-stage { min-width: 0; background: var(--paper); }

.companion-stage > header {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0 var(--space-4);
  color: var(--paper-muted);
  background: rgb(239 235 228 / 90%);
  border-bottom: 1px solid var(--paper-line);
  font-size: .68rem;
}

.companion-stage > header strong { color: var(--paper-ink); font-weight: 560; }
.companion-stage > header small { color: #315f7d; }
.companion-window-title { display: inline-flex; align-items: center; gap: 12px; }
.window-dots { display: inline-flex; gap: 5px; }
.window-dots b { width: 7px; height: 7px; border-radius: 50%; background: #ff5f57; }
.window-dots b:nth-child(2) { background: #febc2e; }
.window-dots b:nth-child(3) { background: #28c840; }
.companion-content { padding: clamp(var(--space-4), 5vw, var(--space-7)); }

.companion-intro small,
.companion-panel-head span,
.companion-ledgers > aside > span {
  color: #315f7d;
  font-size: .61rem;
  font-weight: 590;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.companion-intro h3 {
  max-width: 14ch;
  margin-top: var(--space-2);
  color: var(--paper-ink);
  font-size: clamp(2.5rem, 5vw, 5.3rem);
  line-height: .9;
  letter-spacing: -.07em;
}

.companion-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: var(--space-6) 0 var(--space-4);
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.companion-metrics div {
  min-width: 0;
  padding: var(--space-3) var(--space-2) var(--space-3) 0;
}

.companion-metrics div + div { padding-left: var(--space-3); border-left: 1px solid var(--paper-line); }
.companion-metrics dt { color: var(--paper-muted); font-size: .61rem; letter-spacing: .1em; text-transform: uppercase; }
.companion-metrics dd { overflow: hidden; margin: 5px 0 0; color: var(--paper-ink); font-size: clamp(1rem, 1.7vw, 1.4rem); text-overflow: ellipsis; white-space: nowrap; }

.companion-ledgers {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(16rem, .55fr);
  gap: var(--space-3);
}

.companion-ledgers > section,
.companion-ledgers > aside {
  padding: var(--space-3);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
}

.companion-panel-head strong,
.companion-ledgers > aside > strong {
  display: block;
  margin-top: 4px;
  color: var(--paper-ink);
  font-size: 1.1rem;
  font-weight: 430;
}

.companion-ledgers ol { margin: var(--space-3) 0 0; padding: 0; list-style: none; border-top: 1px solid var(--paper-line); }
.companion-ledgers li { min-height: 70px; display: grid; grid-template-columns: 8px minmax(7rem, 1fr) minmax(7rem, .8fr) auto; align-items: center; gap: var(--space-2); border-bottom: 1px solid var(--paper-line); }
.companion-ledgers li:last-child { border-bottom: 0; }
.companion-ledgers li > i { width: 7px; height: 7px; border-radius: 50%; background: #315f7d; }
.companion-ledgers li strong, .companion-ledgers li code { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.companion-ledgers li strong { font-size: .74rem; font-weight: 570; }
.companion-ledgers li code, .companion-ledgers li > span, .companion-ledgers li > small { color: var(--paper-muted); font-size: .6rem; }
.companion-ledgers li > span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.companion-ledgers > aside { color: var(--ink); background: var(--field); border-color: var(--line); }
.companion-ledgers > aside > span { color: var(--tech-signal); }
.companion-ledgers > aside > strong { color: var(--ring); }
.companion-ledgers > aside p { margin: var(--space-4) 0 0; color: var(--ink-muted); font-size: .74rem; }

.companion-boundary {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  max-width: 70rem;
  margin: var(--space-3) 0 0 auto;
  color: var(--paper-muted);
  font-size: .74rem;
}

.companion-boundary span { color: #315f7d; }

@media (max-width: 76rem) {
  .companion-frame { grid-template-columns: 13rem minmax(0, 1fr); }
  .companion-ledgers { grid-template-columns: 1fr; }
}

@media (max-width: 60rem) {
  .companion-heading { grid-template-columns: 1fr; gap: var(--space-4); }
  .companion-frame { grid-template-columns: 1fr; }
  .companion-rail { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: var(--space-2); border-right: 0; border-bottom: 1px solid var(--line); }
  .companion-ready { justify-self: end; margin: 0; }
  .companion-rail ol { grid-column: 1 / -1; display: flex; overflow: hidden; }
  .companion-rail li { min-width: max-content; }
  .companion-rail > small { display: none; }
}

@media (max-width: 42rem) {
  .companion-frame { margin-inline: calc(var(--gutter) * -1); border-right: 0; border-left: 0; border-radius: 0; }
  .companion-lockup img { width: 42px; height: 42px; }
  .companion-ready span { display: none; }
  .companion-rail li span { display: none; }
  .companion-rail ol { width: 100%; }
  .companion-rail li {
    min-width: 0;
    flex: 1 1 0;
    justify-content: center;
    padding-inline: 4px;
    font-size: .66rem;
    text-align: center;
  }
  .companion-content { padding: var(--space-4) var(--space-3); }
  .companion-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .companion-metrics div:nth-child(3) { border-left: 0; }
  .companion-ledgers li { grid-template-columns: 8px minmax(0, 1fr) auto; }
  .companion-ledgers li > span { display: none; }
  .companion-boundary { margin-top: var(--space-3); }
}

/* Capability ledger / daylight */

.surface {
  color: var(--paper-ink);
  background: var(--paper);
}

.surface .section-heading > p {
  color: var(--paper-soft);
}

.capability-ledger {
  border-top: 1px solid var(--paper-line);
}

.capability-ledger article {
  min-height: 10rem;
  display: grid;
  grid-template-columns: 56px minmax(18rem, 0.75fr) minmax(24rem, 1fr) auto;
  align-items: center;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--paper-line);
}

.capability-ledger > article > span {
  color: #86552f;
  font-family: var(--mono);
  font-size: 0.72rem;
}

.capability-ledger .micro-label {
  color: var(--paper-muted);
}

.capability-ledger h3 {
  font-size: clamp(1.5rem, 2.4vw, 2.6rem);
  line-height: 1.06;
}

.capability-ledger > article > p {
  margin: 0;
  color: var(--paper-soft);
}

.capability-ledger small {
  color: #86552f;
  font-size: 0.58rem;
  white-space: nowrap;
}

/* Safety */

.safety {
  background:
    radial-gradient(circle at 13% 72%, rgb(29 45 58 / 52%), transparent 30rem),
    var(--field-deep);
}

.safety-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(28rem, 0.82fr);
  gap: clamp(var(--space-7), 10vw, var(--space-9));
}

.safety-copy h2 {
  font-size: clamp(3rem, 6vw, 6.4rem);
}

.safety-copy > p {
  max-width: 42rem;
  margin-top: var(--space-4);
}

.safety-copy .quiet-link {
  margin-top: var(--space-4);
}

.guard-ledger {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.guard-ledger li {
  min-height: 8.5rem;
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  gap: var(--space-3);
  border-bottom: 1px solid var(--line);
}

.guard-ledger li > span {
  color: var(--tech-signal);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.guard-ledger strong {
  display: block;
  color: var(--ring);
  font-variation-settings: "SHRP" 44, "CRSV" 0, "slnt" 0, "wght" 420;
  font-size: 1.2rem;
}

.guard-ledger p {
  margin: var(--space-1) 0 0;
  color: var(--ink-muted);
  font-size: 0.85rem;
}

/* FAQ */

.faq {
  background: var(--surface);
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(18rem, 0.58fr) minmax(30rem, 1fr);
  align-items: start;
  gap: clamp(var(--space-7), 10vw, var(--space-9));
}

.faq-heading {
  position: sticky;
  top: 126px;
}

.faq-list {
  border-top: 1px solid var(--line-strong);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  min-height: 98px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  cursor: pointer;
  color: var(--ring);
  font-variation-settings: "SHRP" 44, "CRSV" 0, "slnt" 0, "wght" 420;
  font-size: clamp(1.05rem, 1.7vw, 1.4rem);
  list-style: none;
}

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

.faq-list summary span {
  color: var(--tech-signal);
  font-size: 1.5rem;
  font-weight: 280;
  transition: transform 220ms var(--ease);
}

.faq-list details[open] summary span {
  transform: rotate(45deg);
}

.faq-list details p {
  max-width: 48rem;
  margin: calc(var(--space-2) * -1) 0 var(--space-4);
  color: var(--ink-soft);
}

/* Final */

.final-cta {
  position: relative;
  min-height: 78svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
  background: var(--field-deep);
}

.final-cta > picture,
.final-veil {
  position: absolute;
  z-index: -2;
  inset: 0;
}

.final-cta > picture img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.76) brightness(0.68);
}

.final-veil {
  z-index: -1;
  background:
    linear-gradient(90deg, #08090b 0%, rgb(8 9 11 / 82%) 44%, rgb(8 9 11 / 18%) 100%),
    linear-gradient(0deg, #08090b 0%, transparent 72%);
}

.final-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(24rem, 0.62fr);
  align-items: end;
  gap: var(--space-7);
  padding-top: var(--space-8);
  padding-bottom: var(--space-7);
}

.final-layout h2 {
  max-width: 12ch;
}

.final-layout > div > p:last-child {
  max-width: 34rem;
  margin-top: var(--space-4);
}

.final-action {
  justify-self: end;
  width: 100%;
  max-width: 36rem;
}

.command-large {
  width: 100%;
}

.final-action > p {
  margin: var(--space-2) 0 0;
  color: var(--ink-muted);
  text-align: right;
}

.final-action > p code {
  color: var(--ring);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--field-deep);
}

.footer-layout {
  min-height: 196px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: var(--space-5);
}

.footer-brand img {
  width: 42px;
  height: 42px;
}

.footer-brand span {
  display: grid;
}

.footer-layout > p {
  margin: 0;
  color: var(--ink-soft);
}

.footer-layout nav {
  display: flex;
  gap: var(--space-3);
}

.footer-layout nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--ink-muted);
  font-size: 0.75rem;
}

.footer-layout > small {
  grid-column: 1 / -1;
  padding: var(--space-3) 0;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-size: 0.68rem;
}

/* Motion and state */

.js .reveal {
  opacity: 0;
  transform: translateY(21px);
  transition: opacity 800ms var(--ease), transform 800ms var(--ease);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@keyframes mark-awaken {
  from { opacity: 0.88; filter: drop-shadow(0 0 21px rgb(244 234 224 / 8%)); }
  to { opacity: 1; filter: drop-shadow(0 0 35px rgb(244 234 224 / 20%)); }
}

@keyframes route-travel {
  from { left: 0; opacity: 0; }
  18% { opacity: 1; }
  82% { opacity: 1; }
  to { left: 100%; opacity: 0; }
}

@media (hover: hover) and (pointer: fine) {
  .primary-nav a:hover,
  .header-actions a:hover,
  .footer-layout nav a:hover {
    color: var(--ink);
  }

  .header-actions .header-cta:hover {
    border-color: var(--phase);
  }

  .quiet-link:hover {
    gap: var(--space-3);
    color: var(--ring);
  }

  .command-control button:hover {
    background: var(--tech-signal);
    transform: translateY(-2px);
  }

  .session-tabs button:hover {
    color: var(--ring);
    background: rgb(125 181 218 / 5%);
  }
}

@media (max-width: 76rem) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.52fr);
    gap: var(--space-5);
  }

  .hero h1 {
    font-size: clamp(3.9rem, 8.5vw, 7rem);
  }

  .hero-instrument {
    min-height: 28rem;
  }

  .instrument-readout {
    right: auto;
    left: 0;
  }

  .routing-layout,
  .safety-layout {
    grid-template-columns: 1fr;
  }

  .routing-copy,
  .safety-copy {
    max-width: 54rem;
  }

  .flow-list li {
    grid-template-columns: 42px minmax(15rem, 0.7fr) minmax(18rem, 1fr);
  }

  .step-proof {
    grid-column: 2 / -1;
    width: min(100%, 28rem);
  }

  .capability-ledger article {
    grid-template-columns: 42px minmax(18rem, 0.72fr) 1fr;
  }

  .capability-ledger small {
    grid-column: 2;
  }
}

@media (max-width: 60rem) {
  .header-shell {
    grid-template-columns: 1fr auto;
  }

  .primary-nav {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    align-content: center;
    padding-top: 140px;
    padding-bottom: 140px;
  }

  .hero-copy {
    position: relative;
    z-index: 2;
  }

  .hero-instrument {
    position: absolute;
    z-index: 0;
    right: -8rem;
    bottom: 3rem;
    width: min(58vw, 34rem);
    min-height: 0;
    opacity: 0.42;
    pointer-events: none;
  }

  .instrument-readout {
    display: none;
  }

  .section-heading,
  .split-heading,
  .final-layout {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .section-heading .eyebrow {
    margin-bottom: 0;
  }

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

  .contract-grid article {
    min-height: 19rem;
    padding: var(--space-4) 0;
  }

  .contract-grid article + article {
    padding-left: 0;
    border-top: 1px solid var(--paper-line);
    border-left: 0;
  }

  .contract-grid h3 {
    max-width: 18ch;
  }

  .flow-list li,
  .capability-ledger article {
    grid-template-columns: 42px 1fr;
  }

  .flow-list > li > p,
  .step-proof,
  .capability-ledger > article > p,
  .capability-ledger small {
    grid-column: 2;
  }

  .routing-layout {
    gap: var(--space-6);
  }

  .route-field {
    min-height: 27rem;
    grid-template-columns: minmax(8rem, 1fr) minmax(2rem, 0.4fr) 6rem minmax(2rem, 0.4fr) minmax(8rem, 1fr);
    padding-inline: var(--space-3);
  }

  .route-core {
    width: 6rem;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .faq-heading {
    position: static;
  }

  .final-action {
    justify-self: start;
  }

  .final-action > p {
    text-align: left;
  }

  .footer-layout {
    grid-template-columns: 1fr auto;
  }

  .footer-layout > p {
    display: none;
  }
}

@media (max-width: 42rem) {
  :root {
    --gutter: 21px;
  }

  .header-shell {
    min-height: 70px;
  }

  .brand-lockup > img {
    width: 36px;
    height: 36px;
  }

  .brand-copy small {
    display: none;
  }

  .header-actions {
    gap: var(--space-2);
  }

  .header-actions .header-cta {
    padding-inline: var(--space-2);
  }

  .hero-grid {
    padding-top: 112px;
    padding-bottom: 112px;
  }

  .hero h1 {
    font-size: clamp(3.3rem, 17vw, 5.5rem);
  }

  .hero-lede {
    font-size: 0.98rem;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .command-control {
    width: 100%;
    min-width: 0;
  }

  .command-control code {
    font-size: 0.68rem;
  }

  .command-control button {
    min-width: 58px;
  }

  .hero-proof {
    gap: var(--space-2) var(--space-3);
  }

  .hero-instrument {
    right: -11rem;
    bottom: 5rem;
    width: 31rem;
  }

  .hero-foot span:nth-child(2) {
    display: none;
  }

  .section-heading h2,
  .routing-copy h2,
  .safety-copy h2,
  .faq-heading h2,
  .final-layout h2,
  .split-heading > div h2 {
    font-size: clamp(2.65rem, 13vw, 4.2rem);
  }

  .flow-list li {
    align-items: start;
    min-height: 0;
    padding-block: var(--space-5);
  }

  .flow-list > li > p,
  .step-proof {
    grid-column: 1 / -1;
  }

  .step-proof {
    width: 100%;
  }

  .model-compat {
    grid-template-columns: 1fr auto;
  }

  .model-compat > span {
    grid-column: 1 / -1;
  }

  .router {
    margin-inline: calc(var(--gutter) * -1);
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .session-tabs {
    overflow-x: auto;
  }

  .session-tabs button {
    min-width: 9.5rem;
  }

  .route-field {
    min-height: 32rem;
    grid-template-columns: 1fr;
    align-content: center;
    gap: var(--space-3);
  }

  .route-endpoint,
  .project-endpoint {
    text-align: center;
  }

  .route-path {
    width: 1px;
    height: 42px;
    justify-self: center;
  }

  .route-path span,
  .route-path.outbound span {
    background: linear-gradient(180deg, transparent, var(--session-accent));
  }

  .route-path i {
    top: 0;
    left: 50%;
    animation-name: route-travel-mobile;
  }

  .route-core {
    justify-self: center;
  }

  .capability-ledger article {
    align-items: start;
    padding-block: var(--space-5);
  }

  .capability-ledger > article > p,
  .capability-ledger small {
    grid-column: 1 / -1;
  }

  .guard-ledger li {
    grid-template-columns: 42px 1fr;
  }

  .faq-list summary {
    min-height: 84px;
  }

  .final-cta {
    min-height: 90svh;
  }

  .footer-layout {
    grid-template-columns: 1fr;
    align-content: center;
    padding-block: var(--space-5);
  }

  .footer-layout nav {
    flex-wrap: wrap;
  }
}

@keyframes route-travel-mobile {
  from { top: 0; opacity: 0; }
  18% { opacity: 1; }
  82% { opacity: 1; }
  to { top: 100%; opacity: 0; }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

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

@media (forced-colors: active) {
  .command-control,
  .router,
  .step-proof,
  .instrument-readout {
    border: 1px solid CanvasText;
  }

  .route-path,
  .live-dot,
  .router-head i,
  .step-proof i {
    background: CanvasText;
    box-shadow: none;
  }
}