:root {
  --engine-black: #0a090c;
  --engine-black-soft: #111014;
  --engine-purple: #957dad;
  --engine-purple-light: #c7b0d7;
  --engine-paper: #f5f4f1;
  --engine-paper-2: #ecebe7;
  --engine-ink: #18161b;
  --engine-muted: #666169;
  --engine-line: rgba(24, 22, 27, 0.13);
  --engine-line-dark: rgba(255, 255, 255, 0.13);
  --engine-shell: min(1360px, calc(100vw - 80px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--engine-ink);
  background: var(--engine-paper);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.engine-menu-open {
  overflow: hidden;
}

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

button,
summary {
  font: inherit;
}

button {
  appearance: none;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 12px;
  z-index: 200;
  padding: 10px 14px;
  color: #111;
  background: #fff;
  transform: translateY(-150%);
}

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

.engine-shell {
  width: var(--engine-shell);
  margin-inline: auto;
}

.engine-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto minmax(250px, 1fr);
  align-items: center;
  min-height: 78px;
  padding: 0 max(34px, calc((100vw - 1360px) / 2));
  color: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 9, 12, 0.78);
  backdrop-filter: blur(18px) saturate(125%);
  transition: min-height 180ms ease, background 180ms ease;
}

.engine-header.is-compact {
  min-height: 66px;
  background: rgba(10, 9, 12, 0.93);
}

.engine-brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 10px;
  min-width: 0;
  color: #fff;
}

.engine-brand img {
  display: block;
  width: 17px;
  height: 21px;
  object-fit: contain;
}

.engine-brand strong {
  font-size: 15px;
  font-weight: 720;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.engine-brand > span {
  width: 1px;
  height: 15px;
  margin-inline: 2px;
  background: rgba(255, 255, 255, 0.2);
}

.engine-brand small {
  overflow: hidden;
  color: rgba(255, 255, 255, 0.5);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.11em;
  white-space: nowrap;
}

.engine-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(24px, 2.4vw, 42px);
}

.engine-nav a {
  position: relative;
  padding: 28px 0 25px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
  font-weight: 620;
  white-space: nowrap;
  transition: color 160ms ease;
}

.engine-header.is-compact .engine-nav a {
  padding-block: 22px 20px;
}

.engine-nav a::after {
  position: absolute;
  right: 0;
  bottom: 17px;
  left: 0;
  height: 1px;
  content: "";
  background: var(--engine-purple-light);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 160ms ease;
}

.engine-nav a:hover,
.engine-nav a.is-active {
  color: #fff;
}

.engine-nav a:hover::after,
.engine-nav a.is-active::after {
  transform: scaleX(1);
}

.engine-header-cta {
  justify-self: end;
  padding: 11px 18px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 680;
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
}

.engine-header-cta:hover {
  color: #161219;
  border-color: #fff;
  background: #fff;
}

.engine-menu-button {
  display: none;
}

.engine-hero {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  padding: 190px 0 120px;
  color: #f8f6f9;
  background:
    linear-gradient(180deg, #0b0a0d 0%, #100d13 62%, #151019 100%);
  isolation: isolate;
}

.engine-hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  height: 160px;
  content: "";
  background: linear-gradient(180deg, rgba(21, 16, 25, 0) 0%, rgba(149, 125, 173, 0.15) 48%, var(--engine-paper) 100%);
}

.engine-hero-glow {
  position: absolute;
  top: -160px;
  right: -8vw;
  z-index: -1;
  width: min(880px, 76vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(149, 125, 173, 0.31) 0%, rgba(149, 125, 173, 0.12) 36%, rgba(149, 125, 173, 0) 70%);
  filter: blur(18px);
}

.engine-hero-copy {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(400px, 0.85fr);
  gap: clamp(70px, 9vw, 150px);
  align-items: end;
}

.engine-kicker {
  margin: 0 0 27px;
  color: var(--engine-purple-light);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.engine-kicker-dark {
  color: #765d8c;
}

.engine-hero h1 {
  margin: 0;
  max-width: 800px;
  color: #fff;
  font-size: clamp(56px, 6.1vw, 88px);
  font-weight: 590;
  line-height: 0.99;
  letter-spacing: -0.075em;
}

.engine-hero h1 em {
  color: var(--engine-purple-light);
  font-style: normal;
}

.engine-hero-intro {
  max-width: 560px;
  padding-bottom: 4px;
}

.engine-hero-intro > p {
  margin: 0;
  color: rgba(248, 246, 249, 0.68);
  font-size: 18px;
  line-height: 1.8;
}

.engine-hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 34px;
}

.engine-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  font-size: 13px;
  font-weight: 690;
  transition: color 170ms ease, background 170ms ease, border-color 170ms ease, transform 170ms ease;
}

.engine-button:hover {
  transform: translateY(-1px);
}

.engine-button-primary {
  padding: 0 23px;
  color: #17131a;
  border: 1px solid #eee9f1;
  border-radius: 999px;
  background: #eee9f1;
}

.engine-button-primary:hover {
  border-color: #fff;
  background: #fff;
}

.engine-button-text {
  position: relative;
  color: rgba(255, 255, 255, 0.75);
}

.engine-button-text::after {
  position: absolute;
  right: 0;
  bottom: 8px;
  left: 0;
  height: 1px;
  content: "";
  background: currentColor;
  transform: scaleX(0.38);
  transform-origin: left;
  transition: transform 170ms ease;
}

.engine-button-text:hover {
  color: #fff;
}

.engine-button-text:hover::after {
  transform: scaleX(1);
}

.engine-hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 48px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.engine-hero-facts div + div {
  padding-left: 22px;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.engine-hero-facts dt {
  color: rgba(255, 255, 255, 0.35);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.engine-hero-facts dd {
  margin: 9px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 11px;
  font-weight: 670;
  white-space: nowrap;
}

.engine-demo-wrap {
  position: relative;
  z-index: 2;
  margin-top: 84px;
}

.engine-demo-stage {
  overflow: hidden;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 26px;
  background: #070709;
  box-shadow: 0 48px 110px rgba(0, 0, 0, 0.42);
}

.engine-demo-toolbar {
  display: grid;
  grid-template-columns: minmax(170px, 1fr) auto minmax(170px, 1fr);
  align-items: center;
  min-height: 68px;
  padding: 10px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  background: #100e12;
}

.engine-live-label {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 8px;
  color: rgba(255, 255, 255, 0.88);
  font-family: "SFMono-Regular", Consolas, monospace;
}

.engine-live-label > span {
  width: 7px;
  height: 7px;
  border: 2px solid rgba(197, 171, 216, 0.18);
  border-radius: 50%;
  background: #c1a6d5;
  box-shadow: 0 0 12px rgba(193, 166, 213, 0.72);
}

.engine-live-label strong {
  font-size: 10px;
  letter-spacing: 0.1em;
}

.engine-live-label small {
  color: rgba(255, 255, 255, 0.34);
  font-size: 9px;
}

.engine-scene-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.025);
}

.engine-scene-tabs button {
  min-height: 34px;
  padding: 0 17px;
  color: rgba(255, 255, 255, 0.46);
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  font-size: 11px;
  font-weight: 680;
  transition: color 150ms ease, background 150ms ease;
}

.engine-scene-tabs button:hover {
  color: rgba(255, 255, 255, 0.82);
}

.engine-scene-tabs button.is-active {
  color: #171319;
  background: #eee9f1;
}

.engine-fullscreen {
  justify-self: end;
  min-height: 36px;
  padding: 0 15px;
  color: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  font-size: 10px;
  font-weight: 650;
  transition: color 150ms ease, border-color 150ms ease, background 150ms ease;
}

.engine-fullscreen:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.04);
}

.engine-demo-canvas {
  position: relative;
  height: clamp(560px, 54vw, 720px);
  overflow: hidden;
  background: #050506;
}

.engine-demo-canvas iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #050506;
  opacity: 1;
  transition: opacity 200ms ease;
}

.engine-demo-stage.is-loading .engine-demo-canvas iframe {
  opacity: 0.32;
}

.engine-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  padding: 10px 15px;
  color: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(11, 10, 13, 0.74);
  font-size: 10px;
  letter-spacing: 0.08em;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -40%);
  transition: opacity 160ms ease, transform 160ms ease;
}

.engine-demo-stage.is-loading .engine-loading {
  opacity: 1;
  transform: translate(-50%, -50%);
}

.engine-control-hint {
  position: absolute;
  bottom: 20px;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  color: rgba(255, 255, 255, 0.64);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(9, 8, 10, 0.68);
  backdrop-filter: blur(12px);
  font-size: 10px;
  pointer-events: none;
  transform: translateX(-50%);
  transition: opacity 200ms ease, transform 200ms ease;
}

.engine-control-hint i {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #bda2d0;
}

.engine-control-hint.is-hidden {
  opacity: 0;
  transform: translate(-50%, 7px);
}

.engine-demo-caption {
  display: grid;
  grid-template-columns: minmax(210px, 0.6fr) minmax(300px, 1fr) minmax(300px, 0.82fr);
  gap: 38px;
  align-items: center;
  min-height: 108px;
  padding: 22px 30px;
  color: rgba(255, 255, 255, 0.62);
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  background: #100e12;
}

.engine-demo-caption div > span {
  color: var(--engine-purple-light);
  font-size: 9px;
  letter-spacing: 0.09em;
}

.engine-demo-caption h2 {
  margin: 5px 0 0;
  color: #fff;
  font-size: 18px;
  font-weight: 620;
  letter-spacing: -0.03em;
}

.engine-demo-caption p,
.engine-demo-caption small {
  margin: 0;
  font-size: 12px;
  line-height: 1.65;
}

.engine-demo-caption small {
  padding-left: 28px;
  color: rgba(255, 255, 255, 0.36);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.engine-demo-stage:fullscreen {
  width: 100vw;
  height: 100vh;
  border: 0;
  border-radius: 0;
}

.engine-demo-stage:fullscreen .engine-demo-canvas {
  height: calc(100vh - 176px);
}

.engine-demo-stage:fullscreen .engine-demo-caption {
  min-height: 108px;
}

.engine-section {
  padding: clamp(110px, 11vw, 172px) 0;
}

.engine-capabilities {
  background: var(--engine-paper);
}

.engine-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.55fr);
  column-gap: clamp(80px, 11vw, 180px);
  align-items: end;
  padding-bottom: 76px;
  border-bottom: 1px solid var(--engine-line);
}

.engine-section-heading .engine-kicker {
  grid-column: 1 / -1;
}

.engine-section-heading h2,
.engine-pipeline-heading h2,
.engine-integration h2,
.engine-scenes-heading h2,
.engine-runtime h2,
.engine-final h2 {
  margin: 0;
  font-size: clamp(44px, 4.55vw, 68px);
  font-weight: 590;
  line-height: 1.05;
  letter-spacing: -0.065em;
}

.engine-section-heading > p:last-child {
  margin: 0 0 5px;
  color: var(--engine-muted);
  font-size: 15px;
  line-height: 1.85;
}

.engine-ability-list article {
  display: grid;
  grid-template-columns: 70px minmax(220px, 0.7fr) minmax(320px, 1fr) 120px;
  gap: 28px;
  align-items: center;
  min-height: 138px;
  border-bottom: 1px solid var(--engine-line);
}

.engine-ability-list article > span {
  color: #806792;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
}

.engine-ability-list h3 {
  margin: 0;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.04em;
}

.engine-ability-list p {
  margin: 0;
  color: var(--engine-muted);
  font-size: 14px;
  line-height: 1.75;
}

.engine-ability-list small {
  justify-self: end;
  color: #8b858d;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
}

.engine-pipeline {
  color: #f7f5f8;
  background:
    radial-gradient(circle at 82% 15%, rgba(149, 125, 173, 0.25), rgba(149, 125, 173, 0) 30%),
    linear-gradient(180deg, #111014 0%, #0a090c 100%);
}

.engine-pipeline-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.55fr);
  gap: clamp(80px, 10vw, 160px);
  align-items: end;
}

.engine-pipeline-heading > p {
  margin: 0 0 5px;
  color: rgba(255, 255, 255, 0.53);
  font-size: 15px;
  line-height: 1.85;
}

.engine-pipeline-steps {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin: 96px 0 0;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.17);
  list-style: none;
}

.engine-pipeline-steps li {
  position: relative;
  min-height: 188px;
  padding: 28px 20px 28px 0;
}

.engine-pipeline-steps li::before {
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  content: "";
  border-radius: 50%;
  background: var(--engine-purple-light);
  box-shadow: 0 0 0 7px rgba(199, 176, 215, 0.08);
}

.engine-pipeline-steps li + li {
  padding-left: 24px;
  border-left: 1px solid rgba(255, 255, 255, 0.09);
}

.engine-pipeline-steps span {
  color: rgba(255, 255, 255, 0.3);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
}

.engine-pipeline-steps strong {
  display: block;
  margin-top: 36px;
  color: #fff;
  font-size: 17px;
  font-weight: 620;
}

.engine-pipeline-steps p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.42);
  font-size: 12px;
}

.engine-pipeline-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 23px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.engine-pipeline-note strong {
  color: #fff;
  font-size: 14px;
}

.engine-pipeline-note span {
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
}

.engine-integration {
  background: #f8f7f4;
}

.engine-integration-grid {
  display: grid;
  grid-template-columns: minmax(380px, 0.72fr) minmax(560px, 1fr);
  gap: clamp(90px, 11vw, 180px);
}

.engine-integration header {
  align-self: start;
  position: sticky;
  top: 120px;
}

.engine-integration header > p:last-child {
  max-width: 540px;
  margin: 34px 0 0;
  color: var(--engine-muted);
  font-size: 15px;
  line-height: 1.85;
}

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

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

.engine-integration-list summary {
  display: grid;
  grid-template-columns: 48px minmax(180px, 0.7fr) minmax(220px, 1fr);
  gap: 24px;
  align-items: center;
  min-height: 112px;
  cursor: pointer;
  list-style: none;
}

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

.engine-integration-list summary span {
  color: #7c648e;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
}

.engine-integration-list summary strong {
  font-size: 21px;
  font-weight: 610;
  letter-spacing: -0.035em;
}

.engine-integration-list summary small {
  color: var(--engine-muted);
  font-size: 13px;
}

.engine-integration-list details p {
  max-width: 620px;
  margin: -9px 0 0 72px;
  padding: 0 0 34px;
  color: var(--engine-muted);
  font-size: 14px;
  line-height: 1.8;
}

.engine-scenes {
  background: var(--engine-paper-2);
}

.engine-scenes-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.46fr);
  gap: clamp(80px, 10vw, 160px);
  align-items: end;
}

.engine-scenes-heading > p {
  margin: 0 0 5px;
  color: var(--engine-muted);
  font-size: 15px;
  line-height: 1.85;
}

.engine-scene-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 72px;
}

.engine-scene-gallery a {
  position: relative;
  display: block;
  min-height: 430px;
  overflow: hidden;
  color: #fff;
  background: #161519;
}

.engine-scene-gallery .engine-scene-wide {
  grid-column: 1 / -1;
  min-height: 580px;
}

.engine-scene-gallery img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.86;
  transform: scale(1.001);
  transition: opacity 450ms ease, transform 900ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.engine-scene-gallery a::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(180deg, rgba(6, 6, 7, 0.05) 35%, rgba(6, 6, 7, 0.76) 100%);
}

.engine-scene-gallery a:hover img {
  opacity: 1;
  transform: scale(1.025);
}

.engine-scene-gallery a > span {
  position: absolute;
  right: 30px;
  bottom: 27px;
  left: 30px;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 24px;
  align-items: end;
}

.engine-scene-gallery small {
  grid-column: 1 / -1;
  color: rgba(255, 255, 255, 0.62);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.09em;
}

.engine-scene-gallery strong {
  font-size: 24px;
  font-weight: 610;
  letter-spacing: -0.04em;
}

.engine-scene-gallery em {
  color: rgba(255, 255, 255, 0.66);
  font-size: 12px;
  font-style: normal;
}

.engine-runtime {
  padding-block: 100px;
  background: #f8f7f4;
}

.engine-runtime-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.7fr) minmax(580px, 1fr);
  gap: clamp(90px, 11vw, 180px);
  align-items: start;
}

.engine-runtime h2 {
  max-width: 500px;
  font-size: clamp(38px, 4vw, 58px);
}

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

.engine-runtime-list p {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 30px;
  margin: 0;
  padding: 24px 0;
  border-bottom: 1px solid var(--engine-line);
}

.engine-runtime-list strong {
  font-size: 14px;
}

.engine-runtime-list span {
  color: var(--engine-muted);
  font-size: 13px;
  line-height: 1.7;
}

.engine-final {
  padding: clamp(120px, 14vw, 210px) 0;
  color: #fff;
  background:
    radial-gradient(circle at 84% 20%, rgba(149, 125, 173, 0.34), transparent 34%),
    linear-gradient(145deg, #0a090c 0%, #17101b 100%);
}

.engine-final .engine-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 60px;
}

.engine-final .engine-kicker {
  grid-column: 1 / -1;
}

.engine-final h2 {
  font-size: clamp(52px, 6vw, 84px);
}

.engine-final .engine-shell > div {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-bottom: 5px;
}

.engine-scene-tabs button:focus-visible,
.engine-fullscreen:focus-visible,
.engine-button:focus-visible,
.engine-header a:focus-visible,
.engine-menu-button:focus-visible,
.engine-integration-list summary:focus-visible,
.engine-scene-gallery a:focus-visible {
  outline: 2px solid var(--engine-purple-light);
  outline-offset: 4px;
}

@media (max-width: 1180px) {
  :root {
    --engine-shell: min(1120px, calc(100vw - 48px));
  }

  .engine-header {
    grid-template-columns: minmax(220px, 1fr) auto minmax(100px, 0.35fr);
    padding-inline: 24px;
  }

  .engine-nav {
    gap: 22px;
  }

  .engine-nav a {
    font-size: 12px;
  }

  .engine-hero-copy,
  .engine-section-heading,
  .engine-pipeline-heading,
  .engine-scenes-heading {
    gap: 70px;
  }

  .engine-demo-canvas {
    height: clamp(520px, 59vw, 650px);
  }

  .engine-ability-list article {
    grid-template-columns: 54px minmax(190px, 0.65fr) minmax(280px, 1fr) 90px;
  }

  .engine-integration-grid,
  .engine-runtime-grid {
    gap: 70px;
  }
}

@media (max-width: 920px) {
  .engine-header {
    grid-template-columns: 1fr auto;
    min-height: 68px;
  }

  .engine-header.is-compact {
    min-height: 62px;
  }

  .engine-brand small,
  .engine-brand > span,
  .engine-header-cta {
    display: none;
  }

  .engine-menu-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 13px;
    color: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 999px;
    background: transparent;
    cursor: pointer;
    font-size: 11px;
  }

  .engine-nav {
    position: fixed;
    top: 62px;
    right: 0;
    left: 0;
    display: grid;
    gap: 0;
    padding: 12px 24px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(10, 9, 12, 0.97);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 160ms ease, transform 160ms ease;
  }

  .engine-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .engine-nav a,
  .engine-header.is-compact .engine-nav a {
    padding: 17px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 14px;
  }

  .engine-nav a::after {
    display: none;
  }

  .engine-hero {
    padding-top: 138px;
  }

  .engine-hero-copy,
  .engine-section-heading,
  .engine-pipeline-heading,
  .engine-integration-grid,
  .engine-scenes-heading,
  .engine-runtime-grid {
    grid-template-columns: 1fr;
  }

  .engine-hero-copy,
  .engine-section-heading,
  .engine-pipeline-heading,
  .engine-scenes-heading {
    gap: 42px;
  }

  .engine-hero-intro {
    max-width: 650px;
  }

  .engine-demo-toolbar {
    grid-template-columns: 1fr auto;
    gap: 12px;
    padding: 13px 14px;
  }

  .engine-scene-tabs {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
  }

  .engine-scene-tabs button {
    flex: 1;
  }

  .engine-fullscreen {
    grid-column: 2;
    grid-row: 1;
  }

  .engine-demo-caption {
    grid-template-columns: minmax(170px, 0.45fr) minmax(300px, 1fr);
  }

  .engine-demo-caption small {
    grid-column: 1 / -1;
    padding: 18px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.09);
    border-left: 0;
  }

  .engine-section-heading {
    padding-bottom: 52px;
  }

  .engine-ability-list article {
    grid-template-columns: 52px 1fr;
    gap: 14px 22px;
    padding: 28px 0;
  }

  .engine-ability-list p {
    grid-column: 2;
  }

  .engine-ability-list small {
    display: none;
  }

  .engine-pipeline-steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .engine-pipeline-steps li:nth-child(4) {
    border-left: 0;
  }

  .engine-pipeline-steps li:nth-child(n + 4) {
    border-top: 1px solid rgba(255, 255, 255, 0.09);
  }

  .engine-integration header {
    position: static;
  }

  .engine-scene-gallery .engine-scene-wide {
    min-height: 480px;
  }

  .engine-scene-gallery a {
    min-height: 360px;
  }

  .engine-final .engine-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --engine-shell: calc(100vw - 40px);
  }

  html {
    scroll-padding-top: 72px;
  }

  .engine-header {
    min-height: 62px;
    padding-inline: 20px;
  }

  .engine-hero {
    padding: 122px 0 88px;
  }

  .engine-hero::after {
    height: 110px;
  }

  .engine-kicker {
    margin-bottom: 20px;
    font-size: 9px;
    line-height: 1.6;
  }

  .engine-hero h1 {
    font-size: clamp(43px, 13vw, 56px);
    line-height: 1.02;
  }

  .engine-hero h1 br {
    display: none;
  }

  .engine-hero-copy {
    gap: 34px;
  }

  .engine-hero-intro > p {
    font-size: 16px;
  }

  .engine-hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 17px;
    margin-top: 28px;
  }

  .engine-button-primary {
    width: 100%;
  }

  .engine-hero-facts {
    grid-template-columns: 1fr;
    margin-top: 34px;
    padding-top: 6px;
  }

  .engine-hero-facts div,
  .engine-hero-facts div + div {
    display: grid;
    grid-template-columns: 90px 1fr;
    align-items: center;
    padding: 13px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 0;
  }

  .engine-hero-facts dd {
    margin: 0;
  }

  .engine-demo-wrap {
    width: calc(100vw - 24px);
    margin-top: 56px;
  }

  .engine-demo-stage {
    border-radius: 18px;
  }

  .engine-live-label small {
    display: none;
  }

  .engine-scene-tabs button {
    min-height: 36px;
    padding: 0 8px;
    font-size: 10px;
  }

  .engine-demo-canvas {
    height: auto;
    aspect-ratio: 4 / 5;
  }

  .engine-control-hint {
    bottom: 12px;
    max-width: calc(100% - 24px);
    padding: 9px 12px;
    gap: 7px;
    font-size: 9px;
    white-space: nowrap;
  }

  .engine-control-hint span:last-child,
  .engine-control-hint i:last-of-type {
    display: none;
  }

  .engine-demo-caption {
    grid-template-columns: 1fr;
    gap: 13px;
    padding: 22px 20px;
  }

  .engine-demo-caption p {
    font-size: 11px;
  }

  .engine-demo-caption small {
    padding-top: 13px;
    font-size: 10px;
  }

  .engine-section {
    padding: 94px 0;
  }

  .engine-section-heading h2,
  .engine-pipeline-heading h2,
  .engine-integration h2,
  .engine-scenes-heading h2,
  .engine-runtime h2,
  .engine-final h2 {
    font-size: clamp(38px, 11.7vw, 50px);
  }

  .engine-section-heading h2 br,
  .engine-pipeline-heading h2 br,
  .engine-integration h2 br,
  .engine-final h2 br {
    display: none;
  }

  .engine-section-heading > p:last-child,
  .engine-pipeline-heading > p,
  .engine-integration header > p:last-child,
  .engine-scenes-heading > p {
    font-size: 14px;
  }

  .engine-ability-list article {
    grid-template-columns: 36px 1fr;
    padding: 24px 0;
  }

  .engine-ability-list h3 {
    font-size: 22px;
  }

  .engine-ability-list p {
    font-size: 13px;
  }

  .engine-pipeline-steps {
    grid-template-columns: 1fr;
    margin-top: 58px;
  }

  .engine-pipeline-steps li,
  .engine-pipeline-steps li + li,
  .engine-pipeline-steps li:nth-child(n + 4) {
    display: grid;
    grid-template-columns: 36px minmax(120px, 0.65fr) 1fr;
    gap: 14px;
    align-items: center;
    min-height: 82px;
    padding: 16px 0;
    border-top: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    border-left: 0;
  }

  .engine-pipeline-steps li::before {
    display: none;
  }

  .engine-pipeline-steps strong,
  .engine-pipeline-steps p {
    margin: 0;
  }

  .engine-pipeline-note {
    align-items: flex-start;
    flex-direction: column;
  }

  .engine-integration-grid,
  .engine-runtime-grid {
    gap: 54px;
  }

  .engine-integration-list summary {
    grid-template-columns: 34px 1fr;
    gap: 14px;
    min-height: 94px;
  }

  .engine-integration-list summary small {
    grid-column: 2;
    margin-top: -8px;
  }

  .engine-integration-list details p {
    margin-left: 48px;
    padding-bottom: 28px;
    font-size: 13px;
  }

  .engine-scenes-heading {
    gap: 28px;
  }

  .engine-scene-gallery {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 48px;
  }

  .engine-scene-gallery .engine-scene-wide {
    grid-column: auto;
  }

  .engine-scene-gallery a,
  .engine-scene-gallery .engine-scene-wide {
    min-height: 390px;
  }

  .engine-scene-gallery a > span {
    right: 20px;
    bottom: 19px;
    left: 20px;
    grid-template-columns: 1fr;
  }

  .engine-scene-gallery em {
    display: none;
  }

  .engine-runtime {
    padding-block: 80px;
  }

  .engine-runtime-list p {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .engine-final {
    padding: 104px 0;
  }

  .engine-final .engine-shell {
    gap: 40px;
  }

  .engine-final .engine-shell > div {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}