:root {
  color-scheme: light;
  --color-sage-canvas: #d3e4df;
  --color-pure-white: #fff;
  --color-mint-frost: #edf4f2;
  --color-carbon: #0d1212;
  --color-graphite: #34484a;
  --color-slate: #565959;
  --color-fog: #9aa3a5;
  --color-mist: #7b8889;
  --color-vivid-teal: #64d5b3;
  --color-eucalyptus: #5b8279;
  --font-ui: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --radius-cards: 36px;
  --page-max-width: 1200px;
  font-family: var(--font-ui);
  font-feature-settings: "kern" 0;
  background: var(--color-sage-canvas);
  color: var(--color-carbon);
  scroll-behavior: smooth;
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 16px; line-height: 1.5; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
button, summary, a { touch-action: manipulation; }
button:focus-visible, a:focus-visible, select:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--color-carbon); outline-offset: 6px; }
.inside a:focus-visible, .inside button:focus-visible, .inside select:focus-visible { outline-color: white; }
::selection { background: var(--color-carbon); color: white; }
[hidden] { display: none !important; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { font-weight: 400; }
h2 { font-size: 56px; line-height: 1.1; letter-spacing: 0; }
p { text-wrap: pretty; }
.container { width: min(var(--page-max-width), calc(100% - 96px)); margin-inline: auto; }
.section { padding-block: 100px; scroll-margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 24px; border: 0; border-radius: 12px; padding: 15px 24px; font-size: 14px; font-weight: 500; white-space: nowrap; transition: transform .2s, background-color .2s; min-height: 48px; }
.button:hover { transform: translateY(-2px); }
.button:active { transform: scale(.98); }
.button-teal { background: var(--color-vivid-teal); color: var(--color-carbon); }
.button-teal:hover { background: #78debf; }
.button-dark { background: var(--color-carbon); color: white; border-radius: 16px; }
.button-dark:hover { background: #253030; }
.button span, .text-link span { font-size: 19px; line-height: 1; }
.skip-link { position: absolute; z-index: 3; top: 12px; left: 12px; background: white; padding: 12px; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.site-header { height: 96px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; position: relative; }
.desktop-nav { display: flex; gap: 28px; font-size: 14px; }
.desktop-nav a, .text-link { text-underline-offset: 5px; }
.desktop-nav a:hover, .text-link:hover { text-decoration: underline; }
.wordmark { display: inline-flex; gap: 10px; align-items: center; font-size: 22px; font-weight: 600; letter-spacing: -.7px; line-height: 1; }
.wordmark [lang="zh-Hans"] { letter-spacing: 2px; padding-top: 2px; }
.brand-mark { display: block; width: 38px; height: 38px; flex: none; border-radius: 50%; object-fit: contain; transition: transform .35s cubic-bezier(.34, 1.56, .64, 1); }
.wordmark:hover .brand-mark, .wordmark:focus-visible .brand-mark { transform: rotate(-8deg) scale(1.06); }
@media (prefers-reduced-motion: reduce) { .brand-mark { transition: none; } .wordmark:hover .brand-mark, .wordmark:focus-visible .brand-mark { transform: none; } }
.header-actions { justify-self: end; }
.menu-toggle, .mobile-nav { display: none; }
.hero { padding-block: 80px 100px; text-align: center; }
.eyebrow { font-size: 12px; font-weight: 500; letter-spacing: .05em; text-transform: uppercase; color: var(--color-slate); }
.hero h1 { font-size: 120px; line-height: 1.1; margin: 26px auto 28px; letter-spacing: 0; }
.hero-description { font-size: 20px; line-height: 1.5; color: var(--color-slate); margin: 0 auto 32px; }
.mission { padding-top: 28px; display: grid; grid-template-columns: 1.08fr 1fr; gap: 48px 70px; align-items: center; }
.screenshot { border-radius: var(--radius-cards); overflow: hidden; background: white; position: relative; aspect-ratio: 4 / 3; }
.mission-image { aspect-ratio: 1106 / 856; }
.screenshot > a { display: block; width: 100%; height: 100%; }
.screenshot img { width: 100%; height: 100%; object-fit: cover; display: block; }
.image-label { position: absolute; left: 20px; right: 20px; bottom: 20px; display: flex; justify-content: space-between; padding: 10px 14px; background: var(--color-mint-frost); border-radius: 12px; font-size: 12px; pointer-events: none; }
.badge { display: inline-block; padding: 6px 13px; background: var(--color-mint-frost); border-radius: 20px; font-size: 12px; font-weight: 500; }
.mission-copy h2 { margin-top: 24px; font-size: 40px; line-height: 1.2; }
.mission-copy p { color: var(--color-slate); margin-top: 22px; max-width: 450px; }
.text-link { display: inline-flex; align-items: center; gap: 24px; margin-top: 30px; font-size: 14px; font-weight: 500; padding-block: 8px; }
.mission-facts { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr) auto; padding-top: 36px; border-top: 1px solid #a4b8b1; align-items: center; }
.mission-facts p { display: flex; gap: 16px; align-items: center; }
.mission-facts strong { font-size: 40px; line-height: 1.2; font-weight: 400; }
.mission-facts p span { font-size: 13px; max-width: 90px; color: var(--color-slate); }
.facts-note { font-size: 13px; color: var(--color-slate); }
.fleet { padding-top: 60px; }
.section-heading { text-align: center; }
.section-heading > p:not(.eyebrow) { margin: 24px auto 0; font-size: 18px; color: var(--color-slate); max-width: 610px; }
.fleet-tabs { display: flex; justify-content: center; gap: 8px; margin: 36px 0; }
.fleet-tabs button { border: 1px solid transparent; border-radius: 20px; background: transparent; padding: 10px 27px; font-size: 14px; min-height: 44px; }
.fleet-tabs button:hover { border-color: var(--color-eucalyptus); }
.fleet-tabs button[aria-selected="true"] { background: var(--color-carbon); color: white; }
.fleet-panel { display: grid; grid-template-columns: 1.45fr 1fr; background: white; border-radius: var(--radius-cards); overflow: hidden; }
.robot-stage { position: relative; background: #edf4f2; min-width: 0; display: flex; align-items: center; padding-block: 18px; }
.robot-stage img { display: block; width: 100%; height: auto; aspect-ratio: 5 / 4; object-fit: contain; }
.stage-label, .stage-foot { position: absolute; left: 30px; right: 30px; font-size: 12px; color: var(--color-slate); letter-spacing: .05em; }
.stage-label { top: 28px; }
.stage-foot { bottom: 26px; display: flex; justify-content: space-between; letter-spacing: 0; }
.robot-copy { padding: 48px; align-self: center; }
.role-purpose { color: var(--color-slate); font-size: 14px; margin-bottom: 12px; }
.robot-copy h3 { font-size: 40px; line-height: 1.2; margin-bottom: 20px; }
.robot-copy > p:not(.role-purpose) { color: var(--color-slate); font-size: 15px; }
.robot-details { margin: 28px 0 24px; font-size: 13px; }
.robot-details > div { display: flex; justify-content: space-between; padding-block: 10px; gap: 16px; border-bottom: 1px solid #dbe2df; }
.robot-details dt { color: var(--color-slate); }
.robot-details dd { margin: 0; text-align: right; }
.robot-copy > .model-note { font-size: 13px !important; }
.inside { background: var(--color-graphite); color: white; }
.inside .eyebrow { color: #c0d0cc; margin-bottom: 24px; }
.inside .section-heading > p:not(.eyebrow) { color: #d2deda; }
.capture-gallery { margin-top: 48px; }
.gallery-toolbar { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 24px; }
.gallery-picker { width: min(520px, 100%); min-width: 0; }
.gallery-picker label { display: block; font-size: 13px; color: #d2deda; margin-bottom: 8px; }
.gallery-picker select { width: 100%; min-height: 48px; border: 1px solid #a4b8b1; border-radius: 16px; padding: 12px 16px; font-size: 15px; color: var(--color-carbon); background: var(--color-mint-frost); cursor: pointer; }
.gallery-navigation { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
#capture-count { font-size: 13px; font-variant-numeric: tabular-nums; padding-right: 12px; }
.gallery-navigation button { width: 48px; height: 48px; border: 1px solid #a4b8b1; border-radius: 50%; background: transparent; color: white; font-size: 23px; transition: background-color .2s; }
.gallery-navigation button:hover { background: var(--color-mint-frost); color: var(--color-carbon); }
.capture-stage { display: flex; justify-content: center; align-items: center; width: 100%; aspect-ratio: 2000 / 1230; background: #090f0e; border-radius: 36px; position: relative; overflow: hidden; }
.capture-stage img { display: block; width: 100%; height: 100%; object-fit: contain; min-width: 0; }
.capture-stage.panel-capture { padding: 32px; }
.capture-expand { position: absolute; right: 20px; bottom: 20px; display: flex; align-items: center; gap: 20px; color: var(--color-carbon); background: var(--color-mint-frost); border-radius: 12px; padding: 10px 16px; font-size: 13px; }
.capture-caption { padding: 28px 8px 0; max-width: 850px; }
.capture-category { color: #c0d0cc; font-size: 12px; }
.capture-caption h3 { font-size: 30px; line-height: 1.25; margin-block: 8px 12px; }
.capture-caption p { font-size: 15px; color: #d2deda; }
.gallery-status { font-size: 13px; color: #c0d0cc; min-height: 20px; margin: 12px 8px 0; }
.feature-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 52px; }
.feature-pair .screenshot { aspect-ratio: 4 / 3; }
.feature-capture { background: #090f0e; }
.feature-capture img { object-fit: contain; }
.voice-capture { display: flex; flex-direction: column; justify-content: space-evenly; align-items: center; padding: 32px 20px; }
.voice-capture > a { height: auto; }
.voice-capture img { height: auto; }
.voice-prompt { color: var(--color-mint-frost); font-size: 20px; text-align: center; }
.voice-prompt kbd { display: inline-block; font: inherit; border: 1px solid #a4b8b1; border-radius: 8px; padding: 2px 9px; margin-inline: 2px; }
.voice-footnote { font-size: 12px; color: #c0d0cc; text-align: center; }
.feature-pair h3 { font-size: 23px; line-height: 1.3; margin: 26px 8px 12px; }
.feature-pair article > p { font-size: 15px; line-height: 1.6; color: #d2deda; margin-inline: 8px; max-width: 490px; }
.inside-note { text-align: center; color: #c0d0cc; font-size: 13px; margin: 56px auto 0; max-width: 700px; }
.resilience { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; padding-block: 120px; }
.resilience h2 { font-size: 40px; line-height: 1.2; }
.resilience-copy > p { margin-top: 24px; color: var(--color-slate); max-width: 440px; }
.control-layers { border-top: 1px solid #a4b8b1; }
.control-layers details { border-bottom: 1px solid #a4b8b1; }
.control-layers summary { display: grid; grid-template-columns: 32px 1fr 20px; align-items: center; gap: 20px; padding-block: 26px; font-size: 20px; cursor: pointer; list-style: none; }
.control-layers summary::-webkit-details-marker { display: none; }
.layer-number { font-size: 12px; color: var(--color-slate); align-self: start; padding-top: 7px; }
.control-layers small { display: block; font-size: 13px; color: var(--color-slate); margin-top: 5px; }
.disclosure { width: 14px; height: 14px; position: relative; }
.disclosure::before, .disclosure::after { content: ""; position: absolute; background: currentColor; }
.disclosure::before { width: 14px; height: 1px; top: 6px; }
.disclosure::after { height: 14px; width: 1px; left: 6px; }
details[open] .disclosure::after { display: none; }
.control-layers details > p { margin: -3px 36px 26px 52px; font-size: 14px; color: var(--color-slate); line-height: 1.6; }
.start { text-align: center; border-top: 1px solid #a4b8b1; padding-block: 100px 110px; }
.start h2 { margin: 24px 0; }
.start > p { color: var(--color-slate); font-size: 18px; }
.start .button { margin-top: 32px; }
.start > .simulation-note { font-size: 13px; margin-top: 32px; }
.site-footer { padding-top: 48px; border-top: 1px solid #a4b8b1; }
.footer-top { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 48px; padding-bottom: 60px; align-items: start; }
.footer-top p { font-size: 23px; line-height: 1.3; }
.footer-top nav { display: flex; flex-direction: column; font-size: 14px; color: var(--color-slate); }
.footer-top nav a { padding-block: 12px; border-bottom: 1px solid #a4b8b1; display: flex; justify-content: space-between; }
.footer-top nav a:first-child { padding-top: 0; }
.footer-top nav a:hover { color: var(--color-carbon); }
.footer-bottom { border-top: 1px solid #a4b8b1; display: flex; justify-content: space-between; gap: 24px; padding-block: 24px; color: var(--color-slate); font-size: 12px; }
dialog { border: 0; border-radius: 36px; background: var(--color-mint-frost); color: var(--color-carbon); padding: 44px; max-width: 660px; width: calc(100% - 32px); max-height: calc(100dvh - 48px); }
dialog::backdrop { background: rgb(13 18 18 / .55); }
.dialog-close { position: absolute; top: 18px; right: 18px; width: 40px; height: 40px; border: 0; border-radius: 50%; background: transparent; font-size: 28px; }
.dialog-close:hover { background: var(--color-sage-canvas); }
dialog h2 { font-size: 40px; margin: 24px 0 16px; }
dialog h3 { font-size: 23px; margin: 28px 0 12px; }
dialog p { font-size: 15px; color: var(--color-slate); }
.command { margin-top: 20px; padding: 18px; border: 1px solid #a4b8b1; border-radius: 16px; }
.command pre { white-space: pre-wrap; overflow-wrap: anywhere; margin: 0 0 14px; font-size: 13px; }
.command button { background: var(--color-carbon); color: white; border: 0; border-radius: 12px; padding: 10px 14px; font-size: 13px; }
dialog .dialog-note { font-size: 13px; margin-top: 24px; }
.copy-status { min-height: 23px; margin-top: 12px; }
.no-script-note { margin-top: 24px; text-align: center; color: var(--color-slate); }
@media (min-width: 1440px) { .site-header { height: 100px; } }
@media (max-width: 1100px) {
  .container { width: calc(100% - 64px); }
  .hero h1 { font-size: 100px; }
  .mission { gap: 40px; }
  .mission-copy h2, .resilience h2 { font-size: 36px; }
  .robot-copy { padding: 32px; }
  .resilience { gap: 48px; }
  .mission-facts p { gap: 10px; }
}
@media (min-width: 768px) and (max-width: 1023px) {
  .hero h1 { font-size: 56px; }
  .desktop-nav { gap: 16px; font-size: 13px; }
  .site-header .wordmark { font-size: 20px; gap: 9px; }
  .site-header .brand-mark { width: 34px; height: 34px; }
  .site-header .button { padding-inline: 16px; gap: 12px; font-size: 13px; }
  .fleet-panel { grid-template-columns: 1fr 1fr; }
  .mission-facts p { flex-direction: column; align-items: start; }
}
@media (max-width: 767px) {
  .container { width: calc(100% - 40px); }
  .section { padding-block: 72px; scroll-margin-top: 20px; }
  h2 { font-size: 36px; line-height: 1.15; }
  .site-header { height: 80px; grid-template-columns: 1fr auto; }
  .desktop-nav, .header-actions > .button { display: none; }
  .wordmark { font-size: 17px; }
  .site-header .brand-mark { width: 30px; height: 30px; }
  .menu-toggle { display: flex; flex-direction: column; gap: 6px; justify-content: center; align-items: center; width: 44px; height: 44px; border: 1px solid #a4b8b1; border-radius: 12px; background: transparent; }
  .menu-toggle span { width: 17px; height: 1px; background: var(--color-carbon); transition: transform .2s; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  /* Header popover is layer 1; the native dialog uses the browser top layer. */
  .mobile-nav { display: flex; position: absolute; z-index: 1; left: 0; right: 0; top: 72px; background: var(--color-mint-frost); padding: 16px 24px; border-radius: 16px; flex-direction: column; }
  .mobile-nav a { padding-block: 13px; border-bottom: 1px solid #d3e4df; }
  .mobile-nav a:last-child { border-bottom: 0; }
  .hero { padding-block: 60px 76px; }
  .hero h1 { font-size: 56px; line-height: 1.1; margin-block: 24px; }
  .hero-description { font-size: 17px; max-width: 370px; }
  .hero-description br { display: none; }
  .hero .eyebrow { font-size: 11px; }
  .mission { padding-top: 0; grid-template-columns: 1fr; gap: 36px; }
  .mission-image { aspect-ratio: 1106 / 856; }
  .mission-copy { padding-inline: 4px; }
  .mission-copy h2 { font-size: 36px; }
  .mission-copy p { max-width: none; }
  .mission-facts { grid-template-columns: repeat(3, 1fr); gap: 20px 12px; padding-top: 28px; }
  .mission-facts p { flex-direction: column; align-items: start; gap: 6px; }
  .mission-facts strong { font-size: 36px; }
  .mission-facts p span { max-width: 110px; }
  .facts-note { grid-column: 1 / -1; padding-top: 4px; }
  .facts-note br { display: none; }
  .fleet { padding-top: 20px; }
  .section-heading > p:not(.eyebrow) { font-size: 16px; }
  .fleet-tabs { gap: 2px; margin-block: 28px; }
  .fleet-tabs button { padding: 10px 19px; }
  .fleet-panel { grid-template-columns: 1fr; }
  .robot-stage { min-height: 320px; }
  .robot-copy { padding: 32px 28px; }
  .robot-copy h3 { font-size: 36px; }
  .feature-pair { grid-template-columns: 1fr; gap: 40px; margin-top: 36px; }
  .gallery-toolbar { flex-wrap: wrap; gap: 16px; }
  .gallery-picker { width: 100%; }
  .gallery-navigation { width: 100%; justify-content: end; }
  #capture-count { margin-right: auto; }
  .capture-stage { aspect-ratio: 4 / 3; }
  .capture-stage.panel-capture { padding: 16px; }
  .capture-expand { right: 12px; bottom: 12px; padding: 8px 12px; font-size: 12px; gap: 10px; }
  .capture-caption h3 { font-size: 23px; }
  .voice-capture { padding: 20px 12px; }
  .voice-prompt { font-size: 18px; }
  .voice-footnote { font-size: 11px; }
  .feature-pair h3 { margin-top: 22px; }
  .inside-note { text-align: left; margin-top: 40px; padding-inline: 8px; }
  .resilience { grid-template-columns: 1fr; gap: 36px; }
  .resilience-copy > p { max-width: none; }
  .control-layers summary { gap: 14px; font-size: 19px; }
  .start { padding-block: 72px; }
  .start h2 { max-width: 420px; margin-inline: auto; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; padding-bottom: 36px; }
  .footer-top > .wordmark { grid-column: 1 / -1; }
  .footer-top p { font-size: 20px; }
  .footer-bottom { flex-wrap: wrap; gap: 14px; }
  .footer-bottom > span:nth-child(2) { order: 3; width: 100%; }
  .footer-bottom > a { margin-left: auto; }
  dialog { padding: 36px 24px 24px; border-radius: 24px; }
  dialog h2 { font-size: 36px; }
}
@media (max-width: 374px) {
  .hero h1 { font-size: 46px; }
  .fleet-tabs button { padding-inline: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}