:root {
  --orange: #ff5a0a;
  --orange-soft: #ff8b50;
  --cyan: #55c4c9;
  --ink: #171411;
  --muted: #716a65;
  --paper: #f6f1eb;
  --card: #fffdf9;
  --line: rgba(42, 31, 23, .12);
  --dark: #171614;
  --dark-card: #242220;
  --radius: 28px;
  --shadow: 0 28px 80px rgba(56, 35, 20, .13);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.skip { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 16px; border-radius: 999px; background: var(--ink); color: white; }
.skip:focus { top: 16px; }
.topbar { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--line); background: rgba(246, 241, 235, .82); backdrop-filter: blur(24px) saturate(140%); }
.nav { min-height: 70px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 900; letter-spacing: -.03em; }
.brand img { width: 38px; height: 38px; border-radius: 10px; box-shadow: 0 6px 18px rgba(255, 90, 10, .22); }
.brand-word { font-size: 20px; }
.brand-word i { color: var(--orange); font-style: normal; }
.navlinks { display: flex; align-items: center; gap: 24px; margin-left: auto; color: var(--muted); font-size: 14px; font-weight: 650; }
.navlinks a:hover { color: var(--orange); }
.lang { border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.65); color: var(--ink); padding: 8px 13px; cursor: pointer; }
.nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 18px; border-radius: 999px; border: 1px solid var(--ink); background: var(--ink); color: white; font-weight: 750; transition: transform .2s ease, box-shadow .2s ease; }
.nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(30,24,20,.17); }
.button.orange { border-color: var(--orange); background: var(--orange); }
.button.ghost { color: var(--ink); background: transparent; }

.hero { position: relative; overflow: hidden; padding: 84px 0 76px; }
.hero::before { content: ""; position: absolute; inset: -30% auto auto 52%; width: 700px; height: 700px; border-radius: 50%; background: radial-gradient(circle, rgba(255,90,10,.17), transparent 67%); pointer-events: none; }
.hero-grid { display: grid; grid-template-columns: .9fr 1.35fr; align-items: center; gap: 54px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; color: #b63f00; text-transform: uppercase; letter-spacing: .12em; font-size: 12px; font-weight: 850; }
.eyebrow::before { content: ""; width: 22px; height: 3px; border-radius: 99px; background: var(--orange); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 18px 0 20px; font-size: clamp(52px, 6.4vw, 92px); line-height: .98; letter-spacing: -.065em; }
.hero-lead { max-width: 560px; color: var(--muted); font-size: clamp(18px, 2vw, 22px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.store-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.store-button { min-width: 210px; }
.availability { display: flex; align-items: center; gap: 10px; margin-top: 22px; color: var(--muted); font-size: 13px; }
.availability span { display: inline-flex; align-items: center; gap: 6px; }
.availability i { width: 6px; height: 6px; border-radius: 50%; background: var(--orange); }
.device-stage { position: relative; min-height: 590px; }
.mac-shot { position: absolute; inset: 24px 0 auto 0; overflow: hidden; border: 1px solid rgba(255,255,255,.4); border-radius: 20px; background: #1c1b19; box-shadow: 0 42px 100px rgba(35,20,11,.28); transform: rotate(1deg); }
.mac-shot img { width: 100%; }
.phone-shot { position: absolute; z-index: 3; left: -34px; bottom: -2px; width: 190px; overflow: hidden; border: 8px solid #141311; border-radius: 39px; background: white; box-shadow: 0 32px 80px rgba(31,18,10,.31); transform: rotate(-5deg); }
.phone-shot img { aspect-ratio: 1320 / 2868; width: 100%; object-fit: cover; }
.metric-chip { position: absolute; z-index: 4; right: 18px; bottom: 48px; padding: 15px 19px; border: 1px solid rgba(255,255,255,.5); border-radius: 18px; background: rgba(255,253,249,.9); box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.metric-chip small { display: block; color: var(--muted); }
.metric-chip strong { font-size: 26px; letter-spacing: -.04em; }
.metric-chip strong i { color: var(--orange); font-style: normal; }

.stats { position: relative; z-index: 4; margin-top: -10px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: rgba(255,253,249,.78); box-shadow: var(--shadow); }
.stat { padding: 26px 28px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat small { display: block; color: var(--muted); }
.stat strong { display: block; margin-top: 4px; font-size: clamp(23px, 2.3vw, 34px); letter-spacing: -.04em; }
.stat strong i { color: var(--orange); font-style: normal; }

.section { padding: 110px 0; }
.section-head { max-width: 720px; margin-bottom: 46px; }
.section-head h2 { margin: 12px 0 16px; font-size: clamp(38px, 5vw, 66px); line-height: 1.04; letter-spacing: -.055em; }
.section-head p { color: var(--muted); font-size: 19px; }
.dark { color: #f7f3ef; background: var(--dark); }
.dark .section-head p, .dark .muted, .dark .feature-card p { color: #bdb6af; }
.dark .eyebrow { color: #ff9a62; }

.feature-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; }
.feature-card { position: relative; min-height: 290px; overflow: hidden; padding: 32px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.dark .feature-card { border-color: rgba(255,255,255,.1); background: var(--dark-card); }
.feature-card.big { min-height: 620px; grid-row: span 2; }
.feature-card h3 { margin: 0 0 10px; font-size: 27px; letter-spacing: -.035em; }
.feature-card p { max-width: 500px; color: var(--muted); }
.feature-number { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; margin-bottom: 56px; border-radius: 50%; background: var(--orange); color: white; font-weight: 850; }
.chart-visual { position: absolute; inset: auto 30px 24px 30px; height: 220px; }
.chart-visual::before, .chart-visual::after { content: ""; position: absolute; inset: 0; border-radius: 14px; }
.chart-visual::before { background: repeating-linear-gradient(to bottom, transparent 0 43px, rgba(255,255,255,.09) 44px); }
.chart-line { position: absolute; inset: 20px 0 0; background: linear-gradient(180deg, rgba(255,90,10,.42), transparent 90%); clip-path: polygon(0 47%,9% 34%,18% 61%,28% 26%,38% 39%,48% 25%,58% 43%,68% 28%,78% 68%,88% 32%,100% 21%,100% 100%,0 100%); }
.bars { position: absolute; inset: auto 0 0; height: 180px; display: flex; align-items: end; justify-content: space-around; }
.bars i { width: 18px; border-radius: 10px 10px 0 0; background: linear-gradient(#ff5a0a, #ff975e); }
.bars i:nth-child(1){height:48%}.bars i:nth-child(2){height:72%}.bars i:nth-child(3){height:94%}.bars i:nth-child(4){height:64%}.bars i:nth-child(5){height:82%}
.maintenance-card .bars { position: relative; inset: auto; height: 90px; margin-top: 24px; border-bottom: 1px solid rgba(255,255,255,.08); }

.platform-grid { display: grid; grid-template-columns: .62fr 1fr 1.4fr; align-items: end; gap: 22px; }
.platform { position: relative; }
.platform-frame { overflow: hidden; border: 1px solid var(--line); background: white; box-shadow: var(--shadow); }
.platform.phone .platform-frame { border: 7px solid #171614; border-radius: 35px; }
.platform.tablet .platform-frame { border: 7px solid #171614; border-radius: 26px; }
.platform.mac .platform-frame { border-radius: 17px; }
.platform img { width: 100%; }
.platform.phone img { aspect-ratio: 1320 / 2868; object-fit: cover; }
.platform-label { display: flex; align-items: center; justify-content: space-between; margin-top: 17px; }
.platform-label strong { font-size: 18px; }
.platform-label span { color: var(--muted); font-size: 13px; }

.editorial { display: grid; grid-template-columns: .85fr 1.15fr; align-items: center; gap: 72px; }
.editorial-copy h2 { margin: 13px 0 18px; font-size: clamp(38px, 5vw, 64px); line-height: 1.04; letter-spacing: -.055em; }
.editorial-copy > p { color: var(--muted); font-size: 18px; }
.checklist { margin: 28px 0 0; padding: 0; list-style: none; }
.checklist li { position: relative; padding: 13px 0 13px 34px; border-bottom: 1px solid var(--line); }
.checklist li::before { content: "✓"; position: absolute; left: 0; top: 11px; width: 23px; height: 23px; display: grid; place-items: center; border-radius: 50%; background: rgba(255,90,10,.13); color: var(--orange); font-weight: 900; }
.media-card { overflow: hidden; border-radius: 30px; border: 1px solid var(--line); background: #191816; box-shadow: var(--shadow); }
.video-card { width: min(100%, 560px); justify-self: center; }
.media-card video { width: 100%; height: auto; aspect-ratio: 1280 / 1858; object-fit: contain; background: #090909; }
.media-caption { display: flex; justify-content: space-between; gap: 20px; padding: 18px 22px; color: #d3cbc5; font-size: 13px; }

.privacy-band { padding: 74px 0; color: #f9f4ef; background: linear-gradient(120deg, #e94d00, #ff6f1f 55%, #fa8647); }
.privacy-grid { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 50px; }
.privacy-grid h2 { margin: 0 0 14px; font-size: clamp(38px, 5vw, 62px); line-height: 1.04; letter-spacing: -.05em; }
.privacy-grid p { max-width: 660px; color: rgba(255,255,255,.82); }
.privacy-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.privacy-points div { padding: 18px; border: 1px solid rgba(255,255,255,.28); border-radius: 18px; background: rgba(255,255,255,.1); backdrop-filter: blur(8px); }
.privacy-points b { display: block; margin-top: 8px; }

.faq-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: 70px; }
.faq-title h2 { font-size: clamp(38px, 5vw, 60px); line-height: 1.05; letter-spacing: -.05em; }
details { border-top: 1px solid var(--line); }
details:last-child { border-bottom: 1px solid var(--line); }
summary { position: relative; padding: 22px 42px 22px 0; cursor: pointer; font-weight: 760; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 8px; top: 18px; color: var(--orange); font-size: 26px; font-weight: 400; }
details[open] summary::after { content: "–"; }
details p { padding-right: 46px; color: var(--muted); }

.legal-hero { padding: 78px 0 50px; }
.legal-hero h1 { font-size: clamp(46px, 6vw, 76px); }
.legal-hero p { max-width: 760px; color: var(--muted); font-size: 19px; }
.quick-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 32px; }
.quick-card { padding: 22px; border: 1px solid var(--line); border-radius: 20px; background: var(--card); }
.quick-card b { display: block; margin-top: 8px; }
.legal-layout { display: grid; grid-template-columns: 250px 1fr; gap: 50px; padding: 24px 0 100px; }
.toc { position: sticky; top: 100px; align-self: start; padding: 20px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.5); }
.toc b { display: block; margin-bottom: 10px; }
.toc a { display: block; padding: 5px 0; color: var(--muted); font-size: 14px; }
.toc a:hover { color: var(--orange); }
.legal-section { scroll-margin-top: 100px; padding: 0 0 34px; margin-bottom: 34px; border-bottom: 1px solid var(--line); }
.legal-section h2 { font-size: 28px; letter-spacing: -.035em; }
.legal-section p, .legal-section li { color: var(--muted); }
.legal-section li { margin: 8px 0; }
.notice { padding: 18px 20px; border-radius: 18px; background: rgba(255,90,10,.09); }

footer { padding: 48px 0; border-top: 1px solid var(--line); background: #eee7df; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: end; }
.footer-brand { margin-bottom: 13px; font-size: 22px; font-weight: 900; }
.footer-copy { max-width: 520px; color: var(--muted); font-size: 14px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 18px; color: var(--muted); font-size: 14px; }
.filing { margin-top: 10px; color: var(--muted); font-size: 12px; }

.en { display: none; }
body.english .zh { display: none !important; }
body.english .en { display: initial; }
body.english p.en, body.english div.en, body.english section.en, body.english ul.en { display: block; }

@media (max-width: 980px) {
  .navlinks { display: none; }
  .lang { margin-left: auto; }
  .hero { padding-top: 58px; }
  .hero-grid, .editorial, .privacy-grid, .faq-grid { grid-template-columns: 1fr; }
  .device-stage { min-height: 510px; margin-top: 18px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card.big { min-height: 500px; grid-row: auto; }
  .platform-grid { grid-template-columns: .65fr 1fr; }
  .platform.mac { grid-column: 1 / -1; }
  .legal-layout { grid-template-columns: 1fr; }
  .toc { position: static; display: none; }
}

@media (max-width: 700px) {
  .wrap { width: min(100% - 26px, 1180px); }
  .nav { gap: 10px; min-height: 62px; }
  .brand-word { font-size: 17px; }
  .nav-cta { display: none; }
  .hero { padding: 48px 0 54px; }
  h1 { font-size: 55px; }
  .hero-actions .store-button, .store-actions .store-button { flex: 1 1 100%; width: 100%; }
  .device-stage { min-height: 390px; }
  .mac-shot { top: 30px; }
  .phone-shot { width: 130px; left: -4px; border-width: 5px; border-radius: 27px; }
  .metric-chip { right: 0; bottom: 22px; padding: 11px 14px; }
  .metric-chip strong { font-size: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .stat { padding: 19px; }
  .section { padding: 76px 0; }
  .section-head { margin-bottom: 30px; }
  .feature-card { padding: 24px; }
  .feature-card.big { min-height: 480px; }
  .platform-grid { grid-template-columns: .72fr 1.28fr; gap: 12px; }
  .privacy-points, .quick-grid { grid-template-columns: 1fr; }
  .faq-grid { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
  .legal-hero { padding-top: 50px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}