:root {
  --black: #050608;
  --ink: #090b0e;
  --panel: #101318;
  --panel-soft: #15191f;
  --white: #f4f6f8;
  --muted: #9ca5af;
  --line: rgba(226, 233, 240, 0.16);
  --line-strong: rgba(226, 233, 240, 0.34);
  --signal: #8ab9f2;
  --warm: #d8944b;
  --max-width: 1440px;
  --gutter: clamp(20px, 4vw, 64px);
  --header-height: 80px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 70% 15%, rgba(66, 87, 112, 0.13), transparent 34rem),
    var(--black);
  color: var(--white);
  font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button {
  font: inherit;
}

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

.lang {
  display: none;
}

html[data-lang="zh"] .lang-zh {
  display: inline;
}

html[data-lang="en"] .lang-en {
  display: inline;
}

.lang.block {
  display: none;
}

html[data-lang="zh"] .lang-zh.block,
html[data-lang="en"] .lang-en.block {
  display: block;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-height);
  border-bottom: 1px solid transparent;
  transition: background 240ms ease, border-color 240ms ease;
}

.site-header.scrolled,
.site-header.menu-visible {
  border-color: var(--line);
  background: rgba(5, 6, 8, 0.88);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.nav-shell {
  width: min(100%, var(--max-width));
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 180px 1fr auto;
  align-items: center;
  gap: 30px;
}

.brand {
  display: flex;
  align-items: center;
  width: max-content;
}

.brand img {
  width: 118px;
  height: auto;
  filter: invert(1) grayscale(1) brightness(2);
}

.desktop-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: clamp(24px, 3vw, 48px);
}

.desktop-nav a,
.mobile-nav a {
  position: relative;
  color: #c6cbd1;
  font-size: 13px;
  letter-spacing: 0.06em;
  transition: color 180ms ease;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"] {
  color: #fff;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -10px;
  height: 1px;
  background: var(--white);
  transition: right 180ms ease;
}

.desktop-nav a:hover::after,
.desktop-nav a[aria-current="page"]::after {
  right: 0;
}

.nav-actions {
  display: flex;
  justify-self: end;
  align-items: center;
  gap: 18px;
}

.language-switch {
  padding: 6px 0;
  border: 0;
  background: transparent;
  color: #c8cdd3;
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.nav-contact {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: background 180ms ease, color 180ms ease;
}

.nav-contact:hover {
  background: var(--white);
  color: var(--black);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  background: transparent;
  color: #fff;
  cursor: pointer;
}

.menu-button span,
.menu-button::before,
.menu-button::after {
  content: "";
  display: block;
  width: 23px;
  height: 1px;
  margin: 6px auto;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-button[aria-expanded="true"] span {
  opacity: 0;
}

.menu-button[aria-expanded="true"]::before {
  transform: translateY(7px) rotate(45deg);
}

.menu-button[aria-expanded="true"]::after {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
}

main {
  overflow: clip;
}

.container {
  width: min(100%, var(--max-width));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(92px, 11vw, 170px);
}

.section.compact {
  padding-block: clamp(72px, 8vw, 120px);
}

.section-line {
  border-top: 1px solid var(--line);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 24px;
  color: #b7bec6;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--signal);
}

.display {
  max-width: 1040px;
  margin: 0;
  font-size: clamp(44px, 7.5vw, 116px);
  font-weight: 430;
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.display.medium {
  font-size: clamp(42px, 6vw, 88px);
  line-height: 1;
}

.display .accent {
  color: var(--muted);
}

.section-title {
  max-width: 860px;
  margin: 0;
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 450;
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.section-lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: #b7bec6;
  font-size: clamp(16px, 1.45vw, 21px);
  line-height: 1.7;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--white);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.035em;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.button.primary {
  border-color: var(--white);
  background: var(--white);
  color: var(--black);
}

.button:hover {
  border-color: var(--white);
  background: var(--white);
  color: var(--black);
}

.button .arrow {
  margin-left: 28px;
  font-size: 18px;
  line-height: 1;
}

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  background: #090b0d;
}

.hero-media,
.page-hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media {
  object-position: center 48%;
}

.hero::before,
.page-hero::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 5, 7, 0.86) 0%, rgba(3, 5, 7, 0.48) 44%, rgba(3, 5, 7, 0.12) 72%),
    linear-gradient(0deg, rgba(3, 5, 7, 0.95) 0%, transparent 48%, rgba(3, 5, 7, 0.42) 100%);
}

.hero::after,
.page-hero::after {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 0;
  opacity: 0.22;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 100% 80px;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: calc(var(--header-height) + 70px) var(--gutter) clamp(58px, 8vw, 110px);
}

.hero .display {
  max-width: 990px;
}

.hero-copy {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
  align-items: end;
  gap: 60px;
}

.hero-side {
  padding-bottom: 9px;
}

.hero-side p {
  margin: 0;
  color: #d1d6dc;
  font-size: 15px;
  line-height: 1.75;
}

.hero-meta {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line-strong);
  display: flex;
  justify-content: space-between;
  color: #aeb5bd;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.scroll-cue {
  position: absolute;
  z-index: 2;
  right: var(--gutter);
  bottom: 38px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #aab1b9;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transform: rotate(90deg);
  transform-origin: right bottom;
}

.scroll-cue::after {
  content: "";
  width: 44px;
  height: 1px;
  background: currentColor;
}

.page-hero {
  position: relative;
  min-height: min(82svh, 900px);
  display: flex;
  align-items: flex-end;
  background: var(--ink);
}

.page-hero-content {
  position: relative;
  z-index: 2;
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: calc(var(--header-height) + 100px) var(--gutter) clamp(64px, 8vw, 110px);
}

.page-hero .section-lead {
  color: #d1d6dc;
}

.dark-visual {
  filter: saturate(0.82) brightness(0.7) contrast(1.08);
}

.intro-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: clamp(50px, 9vw, 150px);
  align-items: start;
}

.intro-statement {
  position: sticky;
  top: 140px;
}

.intro-copy {
  padding-top: 8px;
}

.intro-copy p {
  margin: 0 0 34px;
  color: #b6bdc5;
  font-size: clamp(18px, 2vw, 29px);
  line-height: 1.58;
  letter-spacing: -0.02em;
}

.intro-copy p strong {
  color: #fff;
  font-weight: 450;
}

.definition-list {
  margin: 62px 0 0;
  border-top: 1px solid var(--line);
}

.definition-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 30px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.definition-row dt {
  color: #858e98;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.definition-row dd {
  margin: 0;
  color: #d5dae0;
  font-size: 14px;
}

.system-section {
  background:
    linear-gradient(120deg, rgba(39, 50, 63, 0.18), transparent 50%),
    #0a0c0f;
}

.system-header {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 60px;
  align-items: end;
}

.system-model {
  position: relative;
  display: grid;
  grid-template-columns: 0.8fr 1.4fr 0.8fr;
  gap: 0;
  margin-top: clamp(70px, 9vw, 130px);
  border-block: 1px solid var(--line-strong);
}

.system-model::before {
  content: "";
  position: absolute;
  top: 78px;
  left: 12%;
  right: 12%;
  height: 1px;
  background: linear-gradient(90deg, var(--signal), rgba(138, 185, 242, 0.18), var(--warm));
}

.system-node {
  position: relative;
  min-height: 330px;
  padding: 48px clamp(20px, 3vw, 48px);
  border-right: 1px solid var(--line);
}

.system-node:last-child {
  border-right: 0;
}

.node-index {
  position: relative;
  z-index: 1;
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: #0a0c0f;
  color: var(--white);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 17px;
}

.system-node.featured .node-index {
  border-color: var(--signal);
  box-shadow: inset 0 0 0 8px rgba(138, 185, 242, 0.08);
}

.system-node h3 {
  margin: 68px 0 12px;
  font-size: clamp(24px, 2.5vw, 38px);
  font-weight: 450;
  letter-spacing: -0.03em;
}

.system-node p {
  margin: 0;
  color: #9fa7b0;
  font-size: 14px;
}

.terminal-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.terminal-strip span {
  padding: 12px 8px;
  background: #0e1115;
  color: #bec5cc;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 9px;
  text-align: center;
  letter-spacing: 0.08em;
}

.product-overview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(62px, 8vw, 110px);
  border-top: 1px solid var(--line);
}

.product-tile {
  position: relative;
  --tile-img-width: auto;
  --tile-img-height: 92%;
  --tile-img-x: 0;
  --tile-img-y: 0;
  --tile-img-scale: 1;
  --tile-img-hover-scale: 1.035;
  min-height: 650px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--line);
}

.product-tile:first-child {
  border-left: 1px solid var(--line);
}

.product-tile-image {
  position: relative;
  height: clamp(430px, 28vw, 520px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 42%, rgba(255, 255, 255, 0.11), transparent 42%),
    linear-gradient(180deg, #07090b 0%, #050608 100%);
}

.product-tile-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, #090b0e 0, transparent 33%);
}

.product-tile img {
  width: var(--tile-img-width);
  height: var(--tile-img-height);
  max-width: none;
  object-fit: contain;
  object-position: center bottom;
  filter: contrast(1.03);
  transform: translate(var(--tile-img-x), var(--tile-img-y)) scale(var(--tile-img-scale));
  transition: transform 500ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.product-tile:hover img {
  transform: translate(var(--tile-img-x), var(--tile-img-y)) scale(var(--tile-img-hover-scale));
}

.product-tile[href*="#g2"] {
  --tile-img-height: 94%;
}

.product-tile[href*="#a2"] {
  --tile-img-height: 95%;
}

.product-tile[href*="#a3"] {
  --tile-img-height: 91%;
}

.product-tile[href*="#d1"] {
  --tile-img-width: 108%;
  --tile-img-height: auto;
  --tile-img-x: 0;
  --tile-img-y: 0;
  --tile-img-scale: 1;
  --tile-img-hover-scale: 1.03;
}

.product-tile-body {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.product-code {
  color: var(--signal);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
}

.product-tile h3 {
  margin: 16px 0 8px;
  font-size: clamp(22px, 2vw, 31px);
  font-weight: 450;
  letter-spacing: -0.03em;
}

.product-tile p {
  margin: 0;
  color: #8f98a2;
  font-size: 13px;
}

.text-link {
  width: max-content;
  margin-top: auto;
  padding-top: 24px;
  color: #e2e6eb;
  font-size: 12px;
  letter-spacing: 0.05em;
}

.text-link::after {
  content: " ↗";
  color: var(--signal);
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(180px, 22vw);
  gap: 14px;
  margin-top: clamp(60px, 8vw, 110px);
}

.scene-card {
  position: relative;
  overflow: hidden;
  background: var(--panel);
}

.scene-card:nth-child(1) {
  grid-column: span 7;
  grid-row: span 2;
}

.scene-card:nth-child(2) {
  grid-column: span 5;
}

.scene-card:nth-child(3) {
  grid-column: span 5;
}

.scene-card:nth-child(4) {
  grid-column: span 12;
}

.scene-card img,
.scene-card video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) brightness(0.73);
  transition: filter 350ms ease, transform 650ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.scene-card:hover img,
.scene-card:hover video {
  filter: saturate(0.95) brightness(0.86);
  transform: scale(1.025);
}

.scene-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(3, 5, 7, 0.86), transparent 55%);
  pointer-events: none;
}

.scene-label {
  position: absolute;
  z-index: 1;
  left: 26px;
  right: 26px;
  bottom: 24px;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
}

.scene-label h3 {
  margin: 0;
  font-size: clamp(23px, 2.5vw, 39px);
  font-weight: 450;
  letter-spacing: -0.03em;
}

.scene-label span {
  color: #d7dde3;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line);
}

.proof-item {
  padding: 46px clamp(18px, 3vw, 44px);
  border-right: 1px solid var(--line);
}

.proof-item:last-child {
  border-right: 0;
}

.proof-value {
  display: block;
  color: #fff;
  font-size: clamp(38px, 4vw, 66px);
  font-weight: 420;
  line-height: 1;
  letter-spacing: -0.05em;
}

.proof-label {
  display: block;
  margin-top: 18px;
  color: #929ba5;
  font-size: 12px;
  line-height: 1.5;
}

.cta-band {
  position: relative;
  overflow: hidden;
  padding-block: clamp(90px, 12vw, 180px);
  background: #e8ebee;
  color: #08090b;
}

.cta-band::after {
  content: "LHR";
  position: absolute;
  right: -0.03em;
  bottom: -0.27em;
  color: rgba(8, 9, 11, 0.055);
  font-size: clamp(180px, 32vw, 520px);
  font-weight: 700;
  line-height: 0.7;
  letter-spacing: -0.1em;
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 50px;
  align-items: end;
}

.cta-band .section-title {
  max-width: 900px;
}

.cta-band .eyebrow {
  color: #3e454d;
}

.cta-band .button {
  border-color: #08090b;
  background: #08090b;
  color: #fff;
}

.site-footer {
  padding: 76px 0 28px;
  background: #050608;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 0.7fr;
  gap: 60px;
  padding-bottom: 72px;
}

.footer-brand img {
  width: 124px;
  filter: invert(1) grayscale(1) brightness(2);
}

.footer-brand p {
  max-width: 430px;
  margin: 24px 0 0;
  color: #8e97a0;
  font-size: 14px;
}

.footer-column h3 {
  margin: 0 0 22px;
  color: #717b85;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.footer-column a,
.footer-column p {
  display: block;
  margin: 0 0 11px;
  color: #c5cbd2;
  font-size: 13px;
}

.footer-column a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: #68717a;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.product-detail {
  display: grid;
  grid-template-columns: minmax(0, 0.93fr) minmax(360px, 0.72fr);
  min-height: 760px;
  border-bottom: 1px solid var(--line);
}

.product-media {
  position: relative;
  min-height: 680px;
  overflow: hidden;
  background: #101318;
}

.product-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.72) saturate(0.82);
}

.product-detail-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(50px, 6vw, 100px);
  background: #090b0e;
}

.product-detail:nth-child(even) .product-media {
  order: 2;
}

.product-detail:nth-child(even) .product-detail-copy {
  order: 1;
}

.product-detail-copy h2 {
  margin: 22px 0 14px;
  font-size: clamp(38px, 4.6vw, 70px);
  font-weight: 430;
  line-height: 1;
  letter-spacing: -0.05em;
}

.product-subtitle {
  margin: 0;
  color: #9ea7b0;
  font-size: 15px;
}

.capability-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 22px;
  margin: 44px 0 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--line);
}

.capability-list span {
  color: #d1d6dc;
  font-size: 12px;
}

.capability-list > span::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--signal);
  vertical-align: 1px;
}

.spec-line {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  margin-top: 42px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: #7e8791;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scenario-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr);
  min-height: 720px;
  border-bottom: 1px solid var(--line);
}

.scenario-feature:nth-child(even) .scenario-feature-media {
  order: 2;
}

.scenario-feature:nth-child(even) .scenario-feature-copy {
  order: 1;
}

.scenario-feature-media {
  min-height: 620px;
  overflow: hidden;
}

.scenario-feature-media img,
.scenario-feature-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.73) saturate(0.8);
}

.scenario-feature-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(50px, 6vw, 100px);
}

.scenario-feature-copy h2 {
  margin: 20px 0 20px;
  font-size: clamp(40px, 5vw, 74px);
  font-weight: 430;
  line-height: 1;
  letter-spacing: -0.05em;
}

.scenario-feature-copy > p {
  margin: 0;
  color: #a9b1ba;
  font-size: 15px;
}

.outcome-list {
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.outcome-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: #ccd2d8;
  font-size: 12px;
}

.outcome-list li::after {
  content: "✓";
  color: var(--signal);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 74px;
  border-block: 1px solid var(--line);
}

.process-step {
  min-height: 280px;
  padding: 32px;
  border-right: 1px solid var(--line);
}

.process-step:last-child {
  border-right: 0;
}

.process-step .number {
  color: var(--signal);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 11px;
}

.process-step h3 {
  margin: 70px 0 14px;
  font-size: 25px;
  font-weight: 450;
  letter-spacing: -0.03em;
}

.process-step p {
  margin: 0;
  color: #8f98a2;
  font-size: 13px;
}

.case-study {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  min-height: 720px;
  background: #111419;
}

.case-study-media {
  overflow: hidden;
}

.case-study-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-study-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(50px, 7vw, 110px);
}

.case-study-copy h2 {
  margin: 22px 0;
  font-size: clamp(38px, 4.5vw, 68px);
  font-weight: 430;
  line-height: 1;
  letter-spacing: -0.05em;
}

.case-study-copy p {
  margin: 0;
  color: #a9b1ba;
}

.case-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 42px;
  background: var(--line);
  border: 1px solid var(--line);
}

.case-metric {
  padding: 22px;
  background: #111419;
}

.case-metric strong {
  display: block;
  font-size: 28px;
  font-weight: 430;
}

.case-metric span {
  color: #848e98;
  font-size: 10px;
}

.about-hero-art {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 0.98fr 1.02fr 1fr 1.05fr;
  opacity: 0.72;
}

.about-hero-art div {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  --about-art-width: auto;
  --about-art-height: 86%;
  --about-art-x: 0;
  --about-art-y: 0;
  --about-art-scale: 1;
  overflow: hidden;
  border-right: 1px solid rgba(255,255,255,0.12);
  background:
    radial-gradient(circle at 50% 48%, rgba(255,255,255,0.12), transparent 44%),
    #050608;
}

.about-hero-art img {
  width: var(--about-art-width);
  height: var(--about-art-height);
  max-width: none;
  object-fit: contain;
  object-position: center bottom;
  filter: saturate(0.84) brightness(0.84);
  transform: translate(var(--about-art-x), var(--about-art-y)) scale(var(--about-art-scale));
}

.about-hero-art div:nth-child(1) {
  --about-art-height: 88%;
  --about-art-x: -1%;
  --about-art-y: 2%;
}

.about-hero-art div:nth-child(2) {
  --about-art-height: 88%;
  --about-art-y: 2%;
}

.about-hero-art div:nth-child(3) {
  --about-art-height: 84%;
  --about-art-y: 2%;
}

.about-hero-art div:nth-child(4) {
  align-items: center;
  --about-art-width: 108%;
  --about-art-height: auto;
  --about-art-x: -2%;
  --about-art-y: 3%;
}

.about-hero::before {
  background:
    linear-gradient(90deg, rgba(3, 5, 7, 0.92), rgba(3, 5, 7, 0.32)),
    linear-gradient(0deg, rgba(3, 5, 7, 0.96), transparent 65%);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 72px;
  border-block: 1px solid var(--line);
}

.principle {
  min-height: 410px;
  padding: 36px;
  border-right: 1px solid var(--line);
}

.principle:last-child {
  border-right: 0;
}

.principle-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--signal);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 11px;
}

.principle h3 {
  margin: 90px 0 16px;
  font-size: 28px;
  font-weight: 450;
  letter-spacing: -0.035em;
}

.principle p {
  margin: 0;
  color: #929ba4;
  font-size: 14px;
}

.cooperation-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 70px;
  background: var(--line);
  border: 1px solid var(--line);
}

.cooperation-item {
  min-height: 250px;
  padding: clamp(28px, 4vw, 50px);
  background: #090b0e;
}

.cooperation-item h3 {
  margin: 0 0 16px;
  font-size: 26px;
  font-weight: 450;
  letter-spacing: -0.03em;
}

.cooperation-item p {
  margin: 0;
  color: #939ca6;
  font-size: 14px;
}

.contact-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.contact-panel > div {
  min-height: 320px;
  padding: clamp(34px, 5vw, 70px);
  background: #0b0d10;
}

.contact-panel h3 {
  margin: 0 0 42px;
  color: #858f99;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.contact-panel a,
.contact-panel address {
  display: block;
  margin: 0 0 16px;
  color: #e2e6ea;
  font-size: clamp(17px, 2vw, 25px);
  font-style: normal;
  line-height: 1.5;
}

.contact-panel a:hover {
  color: var(--signal);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

@media (max-width: 1100px) {
  .desktop-nav,
  .nav-contact {
    display: none;
  }

  .nav-shell {
    grid-template-columns: 1fr auto;
  }

  .nav-actions {
    gap: 12px;
  }

  .menu-button {
    display: block;
  }

  .mobile-nav {
    position: fixed;
    z-index: 49;
    inset: var(--header-height) 0 0;
    display: flex;
    flex-direction: column;
    padding: 40px var(--gutter);
    background: rgba(5, 6, 8, 0.98);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 180ms ease, visibility 180ms ease, transform 180ms ease;
  }

  .mobile-nav.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .mobile-nav a {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
    font-size: clamp(23px, 5vw, 42px);
    letter-spacing: -0.03em;
  }

  .hero-copy,
  .system-header,
  .intro-grid {
    grid-template-columns: 1fr;
  }

  .hero-side {
    max-width: 520px;
  }

  .intro-statement {
    position: static;
  }

  .product-overview {
    grid-template-columns: 1fr 1fr;
  }

  .product-tile:nth-child(3) {
    border-left: 1px solid var(--line);
  }

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

  .proof-item:nth-child(2) {
    border-right: 0;
  }

  .proof-item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .product-detail,
  .scenario-feature,
  .case-study {
    grid-template-columns: 1fr;
  }

  .product-detail:nth-child(even) .product-media,
  .scenario-feature:nth-child(even) .scenario-feature-media {
    order: 1;
  }

  .product-detail:nth-child(even) .product-detail-copy,
  .scenario-feature:nth-child(even) .scenario-feature-copy {
    order: 2;
  }

  .product-detail-copy {
    min-height: 580px;
  }

  .process-grid,
  .principles-grid {
    grid-template-columns: 1fr 1fr;
  }

  .process-step:nth-child(2),
  .principle:nth-child(2) {
    border-right: 0;
  }

  .process-step:nth-child(-n + 2),
  .principle:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 720px) {
  :root {
    --header-height: 68px;
    --gutter: 20px;
  }

  .brand img {
    width: 98px;
  }

  .language-switch {
    font-size: 11px;
  }

  .display {
    font-size: clamp(42px, 13vw, 68px);
    line-height: 0.98;
    letter-spacing: -0.055em;
  }

  .display.medium {
    font-size: clamp(40px, 12vw, 62px);
  }

  .section-title {
    font-size: clamp(35px, 10vw, 54px);
  }

  .hero {
    min-height: 860px;
  }

  .hero::before {
    background:
      linear-gradient(0deg, rgba(3, 5, 7, 0.96) 0%, rgba(3, 5, 7, 0.58) 62%, rgba(3, 5, 7, 0.35) 100%);
  }

  .hero-media {
    object-position: 63% center;
  }

  .hero-content {
    padding-bottom: 72px;
  }

  .hero-copy {
    gap: 38px;
  }

  .hero-side p {
    font-size: 14px;
  }

  .scroll-cue {
    display: none;
  }

  .page-hero {
    min-height: 760px;
  }

  .page-hero-content {
    padding-bottom: 68px;
  }

  .definition-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .system-model {
    grid-template-columns: 1fr;
    border-bottom: 0;
  }

  .system-model::before {
    top: 45px;
    bottom: 45px;
    left: 48px;
    right: auto;
    width: 1px;
    height: auto;
    background: linear-gradient(180deg, var(--signal), rgba(138, 185, 242, 0.18), var(--warm));
  }

  .system-node {
    min-height: auto;
    padding: 28px 20px 34px 88px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .node-index {
    position: absolute;
    left: 18px;
    top: 23px;
  }

  .system-node h3 {
    margin-top: 4px;
  }

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

  .product-overview {
    grid-template-columns: 1fr;
  }

  .product-tile,
  .product-tile:nth-child(3) {
    min-height: 590px;
    border-left: 1px solid var(--line);
  }

  .product-tile-image {
    height: 410px;
  }

  .product-tile[href*="#d1"] {
    --tile-img-width: 100%;
    --tile-img-x: 0;
    --tile-img-y: 0;
  }

  .scene-grid {
    display: grid;
    grid-template-columns: 1fr;
    grid-auto-rows: 400px;
  }

  .scene-card:nth-child(n) {
    grid-column: auto;
    grid-row: auto;
  }

  .proof-strip,
  .process-grid,
  .principles-grid,
  .cooperation-grid,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .proof-item,
  .proof-item:nth-child(2),
  .proof-item:nth-child(-n + 2),
  .process-step,
  .process-step:nth-child(2),
  .process-step:nth-child(-n + 2),
  .principle,
  .principle:nth-child(2),
  .principle:nth-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .cta-content {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .product-media,
  .scenario-feature-media {
    min-height: 510px;
  }

  .product-detail-copy,
  .scenario-feature-copy {
    min-height: auto;
    padding: 64px 20px 74px;
  }

  .capability-list {
    grid-template-columns: 1fr;
  }

  .case-study-media {
    min-height: 430px;
  }

  .case-study-copy {
    padding: 64px 20px 74px;
  }

  .about-hero-art {
    grid-template-columns: 1fr 1fr;
  }

  .about-hero-art div:nth-child(-n + 2) {
    display: none;
  }

  .about-hero-art div:nth-child(3) {
    --about-art-height: 78%;
    --about-art-x: -2%;
  }

  .about-hero-art div:nth-child(4) {
    --about-art-width: 116%;
    --about-art-x: -7%;
    --about-art-y: 4%;
  }

  .principle {
    min-height: 330px;
  }

  .principle h3 {
    margin-top: 60px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

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