:root {
  --ink: #0a0a0a;
  --graphite: #303030;
  --muted: #686868;
  --line: #d8d8d8;
  --soft: #f3f3f1;
  --paper: #fafaf8;
  --white: #ffffff;
  --display: "Arial Narrow", "Microsoft YaHei UI", sans-serif;
  --body: "Segoe UI", "Microsoft YaHei", sans-serif;
  --mono: Consolas, "SFMono-Regular", monospace;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 99; background: var(--ink); color: var(--white); padding: 8px 14px; }
.skip-link:focus { top: 12px; }
.site-header {
  position: sticky; top: 0; z-index: 30;
  border-bottom: 1px solid var(--line);
  background: rgba(250,250,248,.94);
  backdrop-filter: blur(12px);
}
.nav-shell { max-width: var(--max); min-height: 72px; margin: auto; padding: 0 24px; display: flex; align-items: center; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; letter-spacing: -.04em; font-size: 20px; }
.brand-mark { width: 28px; height: 28px; border: 7px solid var(--ink); border-radius: 50%; position: relative; }
.brand-mark::after { content: ""; position: absolute; width: 13px; height: 3px; background: var(--paper); right: -9px; top: 6px; }
.nav-links { display: flex; gap: 26px; margin-left: auto; align-items: center; }
.nav-links a { text-decoration: none; color: var(--graphite); font-size: 14px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-underline-offset: 6px; }
.nav-action, .button {
  min-width: 136px; min-height: 44px; padding: 10px 18px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--ink); background: var(--ink); color: var(--white);
  text-decoration: none; font-size: 14px; font-weight: 700;
  white-space: nowrap; word-break: keep-all; writing-mode: horizontal-tb;
}
.button.secondary { background: transparent; color: var(--ink); }
.button:hover, .nav-action:hover { background: var(--graphite); color: var(--white); }
.menu-button { display: none; border: 0; background: none; width: 44px; height: 44px; font: 700 13px var(--mono); }
.wrap { max-width: var(--max); margin: auto; padding-left: 24px; padding-right: 24px; }
.eyebrow { margin: 0 0 16px; color: var(--muted); font: 600 11px/1.3 var(--mono); letter-spacing: .16em; text-transform: uppercase; }
.hero { max-width: var(--max); margin: 0 auto; padding: 72px 24px 28px; }
.hero-grid { display: grid; grid-template-columns: .86fr 1.14fr; gap: 56px; align-items: center; }
.hero-copy { padding-top: 10px; }
.hero h1 { max-width: 720px; margin: 0; font: 800 clamp(44px, 6.4vw, 88px)/.96 var(--display); letter-spacing: -.065em; }
.hero-lead { max-width: 570px; margin: 28px 0 0; color: var(--graphite); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.micro-proof { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 24px; color: var(--muted); font-size: 12px; }
.micro-proof span::before { content: "—"; margin-right: 7px; }
.hero-media { align-self: center; background: var(--white); border: 1px solid var(--line); height: auto; padding: 0; margin: 0; overflow: visible; transform: none; }
.platform-strip { margin-top: 44px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 180px 1fr; }
.platform-label { padding: 22px 24px; border-right: 1px solid var(--line); font: 600 11px var(--mono); letter-spacing: .12em; }
.platform-list { display: grid; grid-template-columns: repeat(6, 1fr); }
.platform-list span { display: grid; place-items: center; min-height: 64px; border-right: 1px solid var(--line); font: 600 13px var(--mono); }
.platform-list span:last-child { border-right: 0; }
.manifesto { padding: 120px 24px; display: grid; grid-template-columns: 2fr 1fr; gap: 80px; }
.manifesto blockquote { margin: 0; font: 700 clamp(29px, 4vw, 54px)/1.1 var(--display); letter-spacing: -.045em; }
.manifesto aside { border-top: 3px solid var(--ink); padding-top: 18px; color: var(--muted); }
.section-head { display: grid; grid-template-columns: 120px 1fr; gap: 32px; align-items: start; margin-bottom: 50px; }
.section-head h2 { margin: 0; max-width: 820px; font: 800 clamp(34px, 5vw, 66px)/1 var(--display); letter-spacing: -.055em; }
.section-index { font: 600 12px var(--mono); color: var(--muted); padding-top: 9px; }
.capabilities { padding: 110px 0; background: var(--ink); color: var(--white); }
.capabilities .section-index, .capabilities .eyebrow { color: #a7a7a7; }
.cap-grid { display: grid; grid-template-columns: 1.4fr .6fr 1fr; border: 1px solid #3b3b3b; }
.cap-item { min-height: 290px; padding: 32px; border-right: 1px solid #3b3b3b; display: flex; flex-direction: column; }
.cap-item:nth-child(3) { border-right: 0; }
.cap-item:nth-child(4) { grid-column: 1 / -1; min-height: 210px; border-top: 1px solid #3b3b3b; border-right: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: end; }
.cap-item h3 { margin: auto 0 10px; font: 700 30px/1.1 var(--display); }
.cap-item:nth-child(4) h3 { margin: 0; }
.cap-item p { margin: 0; color: #b9b9b9; max-width: 520px; }
.cap-code { color: #858585; font: 11px var(--mono); }
.visual-break { padding: 0; background: var(--ink); }
.visual-break figure { margin: 0 auto; max-width: var(--max); border-left: 1px solid #333; border-right: 1px solid #333; }
.visual-break img { display: block; width: 100%; height: auto; filter: grayscale(1); }
.dispatch { padding: 120px 24px; }
.dispatch-grid { display: grid; grid-template-columns: 1.15fr .85fr; border-top: 1px solid var(--ink); }
.dispatch-main { padding: 40px 50px 40px 0; border-right: 1px solid var(--line); }
.dispatch-main h3 { margin: 0 0 18px; font: 750 36px/1.05 var(--display); }
.dispatch-main p { color: var(--graphite); }
.dispatch-side { padding: 40px 0 40px 50px; }
.news-item { display: grid; grid-template-columns: 92px 1fr; gap: 20px; padding: 19px 0; border-bottom: 1px solid var(--line); }
.news-item time { font: 11px var(--mono); color: var(--muted); }
.news-item h3 { margin: 0 0 6px; font-size: 16px; }
.news-item p { margin: 0; color: var(--muted); font-size: 14px; }
.voices { padding: 110px 0; background: var(--soft); }
.voice-row { display: grid; grid-template-columns: 180px 1fr 260px; gap: 32px; align-items: start; padding: 32px 0; border-top: 1px solid var(--line); }
.voice-row:last-child { border-bottom: 1px solid var(--line); }
.voice-type { font: 700 12px var(--mono); text-transform: uppercase; }
.voice-row blockquote { margin: 0; font-size: 22px; line-height: 1.5; }
.voice-note { color: var(--muted); font-size: 13px; }
.pricing { padding: 120px 24px; }
.price-grid { display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--ink); }
.plan { min-height: 410px; padding: 30px; border-right: 1px solid var(--ink); display: flex; flex-direction: column; }
.plan:last-child { border: 0; }
.plan.featured { background: var(--ink); color: var(--white); }
.plan h3 { margin: 0; font: 750 30px var(--display); }
.price-status { margin: 16px 0 26px; color: var(--muted); font: 12px var(--mono); }
.featured .price-status { color: #aaa; }
.plan ul { padding-left: 18px; margin: 0 0 28px; }
.plan .button { margin-top: auto; }
.featured .button { background: var(--white); color: var(--ink); border-color: var(--white); }
.price-disclaimer { margin: 20px 0 0; color: var(--muted); font-size: 13px; }
.faq { padding: 110px 0; background: var(--white); }
.faq-list { border-top: 1px solid var(--ink); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-question { width: 100%; padding: 25px 0; display: grid; grid-template-columns: 56px 1fr 30px; gap: 16px; text-align: left; border: 0; background: none; color: var(--ink); cursor: pointer; font: 650 18px var(--body); }
.faq-no { color: var(--muted); font: 11px var(--mono); padding-top: 7px; }
.faq-plus { font: 300 24px var(--display); transition: transform .2s; }
.faq-question[aria-expanded="true"] .faq-plus { transform: rotate(45deg); }
.faq-answer { max-width: 840px; padding: 0 30px 25px 72px; color: var(--graphite); }
.faq-answer[hidden] { display: none; }
.final-cta { border-top: 1px solid var(--ink); padding: 74px 24px; }
.final-cta .wrap { display: flex; align-items: end; justify-content: space-between; gap: 40px; padding: 0; }
.final-cta h2 { max-width: 760px; margin: 0; font: 800 clamp(38px,5vw,70px)/.98 var(--display); letter-spacing: -.055em; }
.site-footer { background: var(--ink); color: var(--white); padding: 64px 24px 22px; }
.footer-grid { max-width: var(--max); margin: auto; display: grid; grid-template-columns: 2fr repeat(4,1fr); gap: 36px; }
.footer-brand p { color: #9c9c9c; max-width: 280px; font-size: 13px; }
.footer-col h3 { margin: 0 0 17px; color: #858585; font: 11px var(--mono); letter-spacing: .12em; }
.footer-col a { display: block; color: #ddd; text-decoration: none; margin: 9px 0; font-size: 13px; }
.footer-base { max-width: var(--max); margin: 48px auto 0; padding-top: 20px; border-top: 1px solid #303030; display: flex; justify-content: space-between; color: #858585; font-size: 11px; }
.page-intro { padding: 76px 24px 64px; border-bottom: 1px solid var(--ink); }
.page-intro h1 { max-width: 930px; margin: 0; font: 800 clamp(46px,7vw,92px)/.96 var(--display); letter-spacing: -.06em; }
.page-intro p { max-width: 650px; margin: 26px 0 0; color: var(--graphite); font-size: 17px; }
.download-stage { padding: 90px 24px 120px; }
.download-matrix { display: grid; grid-template-columns: repeat(2,1fr); border: 1px solid var(--ink); }
.download-card { min-height: 270px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 70px 1fr; gap: 22px; }
.download-card:nth-child(2n) { border-right: 0; }
.download-card:nth-last-child(-n+2) { border-bottom: 0; }
.os-glyph { width: 58px; height: 58px; display: grid; place-items: center; border: 1px solid var(--ink); font: 700 11px var(--mono); }
.download-card h2 { margin: 2px 0 8px; font: 750 27px var(--display); }
.download-card p { margin: 0 0 20px; color: var(--muted); font-size: 14px; }
.download-card .button { min-width: 150px; }
.install-note { margin-top: 34px; padding: 24px; background: var(--soft); display: grid; grid-template-columns: 180px 1fr; gap: 30px; }
.manual { padding: 85px 24px 120px; }
.manual-layout { display: grid; grid-template-columns: 260px 1fr; gap: 70px; }
.manual-nav { position: sticky; top: 100px; align-self: start; border-top: 2px solid var(--ink); }
.manual-nav a { display: block; padding: 13px 0; border-bottom: 1px solid var(--line); text-decoration: none; font-size: 13px; }
.manual-content article { padding: 0 0 46px; margin-bottom: 46px; border-bottom: 1px solid var(--line); scroll-margin-top: 100px; }
.manual-content h2 { margin: 0 0 15px; font: 750 32px var(--display); }
.manual-content h3 { margin: 26px 0 8px; font-size: 17px; }
.manual-content p, .manual-content li { color: var(--graphite); }
.legal-box { padding: 24px; border: 1px solid var(--ink); background: var(--white); }
@media (max-width: 840px) {
  .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 18px 24px; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
  .nav-links.open { display: flex; }
  .nav-action { margin-left: auto; min-width: 110px; }
  .menu-button { display: block; }
  .hero-grid, .manifesto, .dispatch-grid, .manual-layout { grid-template-columns: 1fr; }
  .hero-grid { gap: 36px; }
  .manifesto { gap: 38px; }
  .platform-strip { grid-template-columns: 1fr; }
  .platform-label { border-right: 0; border-bottom: 1px solid var(--line); }
  .platform-list { grid-template-columns: repeat(3,1fr); }
  .platform-list span:nth-child(3) { border-right: 0; }
  .platform-list span:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .cap-grid { grid-template-columns: 1fr 1fr; }
  .cap-item:nth-child(2) { border-right: 0; }
  .cap-item:nth-child(3) { border-top: 1px solid #3b3b3b; border-right: 1px solid #3b3b3b; }
  .cap-item:nth-child(4) { grid-column: auto; display: flex; min-height: 290px; }
  .dispatch-main { border-right: 0; padding-right: 0; }
  .dispatch-side { padding-left: 0; border-top: 1px solid var(--line); }
  .voice-row { grid-template-columns: 120px 1fr; }
  .voice-note { grid-column: 2; }
  .price-grid { grid-template-columns: 1fr; }
  .plan { border-right: 0; border-bottom: 1px solid var(--ink); min-height: 340px; }
  .download-matrix { grid-template-columns: 1fr; }
  .download-card { border-right: 0; }
  .download-card:nth-last-child(2) { border-bottom: 1px solid var(--line); }
  .manual-nav { position: static; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .nav-shell { padding: 0 16px; gap: 8px; }
  .nav-action { display: none; }
  .hero, .page-intro { padding-left: 16px; padding-right: 16px; }
  .hero h1 { font-size: 46px; }
  .section-head { grid-template-columns: 1fr; gap: 8px; }
  .platform-list { grid-template-columns: repeat(2,1fr); }
  .platform-list span { border-bottom: 1px solid var(--line); }
  .platform-list span:nth-child(2n) { border-right: 0; }
  .cap-grid { grid-template-columns: 1fr; }
  .cap-item { border-right: 0 !important; border-bottom: 1px solid #3b3b3b; min-height: 230px; }
  .voice-row { grid-template-columns: 1fr; gap: 12px; }
  .voice-note { grid-column: auto; }
  .final-cta .wrap { align-items: stretch; flex-direction: column; }
  .download-card { grid-template-columns: 1fr; }
  .download-card .button { width: 100%; min-width: 190px; flex-direction: row; }
  .install-note { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-base { flex-direction: column; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
/* Hero image final override: keep media naturally centered and never stretched. */
.hero .hero-grid { align-items: center !important; }
.hero .hero-media { align-self: center !important; height: auto !important; padding: 0 !important; margin-top: 0 !important; margin-bottom: 0 !important; overflow: visible !important; transform: none !important; }
.hero .hero-media img { display: block !important; width: 100% !important; height: auto !important; object-fit: contain !important; object-position: center !important; min-height: 0 !important; max-height: none !important; margin: 0 !important; padding: 0 !important; clip-path: none !important; transform: none !important; }