:root {
  color-scheme: light dark;
  --ink: #131722;
  --secondary: #5e6472;
  --blue: #0874f8;
  --cyan: #2fd5fa;
  --indigo: #5a44dd;
  --green: #00a88a;
  --orange: #d97706;
  --red: #d74145;
  --surface: rgba(255, 255, 255, .72);
  --surface-strong: rgba(255, 255, 255, .88);
  --stroke: rgba(20, 31, 55, .09);
  --shadow: 0 24px 70px rgba(43, 52, 89, .13);
  --max: 1120px;
  --radius: 28px;
  --small-radius: 18px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: #f5f7fb;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(circle at 14% 4%, rgba(47, 213, 250, .18), transparent 30rem),
    radial-gradient(circle at 88% 12%, rgba(90, 68, 221, .16), transparent 34rem),
    linear-gradient(180deg, #fbfcff 0, #f4f6fb 64%, #eef2f8 100%);
}

a { color: inherit; }

img { max-width: 100%; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  color: white;
  background: #111827;
  transform: translateY(-160%);
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(20, 31, 55, .06);
  background: rgba(248, 250, 255, .72);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  backdrop-filter: blur(24px) saturate(160%);
}

.nav {
  width: min(calc(100% - 40px), var(--max));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 26px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  font-weight: 730;
  letter-spacing: -.025em;
  text-decoration: none;
}

.brand img { width: 36px; height: 36px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  color: var(--secondary);
}

.nav-links a {
  text-decoration: none;
  transition: color .18s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible { color: var(--ink); }

.language-button {
  min-width: 62px;
  padding: 8px 12px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  background: var(--surface-strong);
  cursor: pointer;
}

.language-button:focus-visible,
.button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(8, 116, 248, .34);
  outline-offset: 3px;
}

main { overflow: hidden; }

.shell {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.hero {
  min-height: 760px;
  padding: 118px 0 96px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  align-items: center;
  gap: 48px;
}

.eyebrow,
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid rgba(8, 116, 248, .16);
  border-radius: 999px;
  color: #0866d4;
  font-size: 13px;
  font-weight: 700;
  background: rgba(234, 245, 255, .75);
}

.eyebrow::before,
.status-pill::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 5px rgba(8, 116, 248, .1);
  content: "";
}

.hero h1 {
  max-width: 690px;
  margin: 23px 0 20px;
  font-size: clamp(52px, 6.4vw, 88px);
  line-height: .98;
  letter-spacing: -.065em;
}

.gradient-text {
  color: transparent;
  background: linear-gradient(110deg, var(--cyan), var(--blue) 48%, var(--indigo));
  -webkit-background-clip: text;
  background-clip: text;
}

.lead {
  max-width: 620px;
  margin: 0;
  color: var(--secondary);
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.55;
  letter-spacing: -.015em;
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 13px;
}

.button {
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--stroke);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  background: var(--surface-strong);
  box-shadow: 0 8px 24px rgba(35, 44, 82, .08);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.button:hover { transform: translateY(-1px); box-shadow: 0 12px 30px rgba(35, 44, 82, .12); }

.button.primary {
  border-color: transparent;
  color: white;
  background: linear-gradient(135deg, #1594ff, #0868ee 58%, #503ad4);
}

.button.disabled {
  color: var(--secondary);
  pointer-events: none;
  box-shadow: none;
  background: rgba(255, 255, 255, .52);
}

.meta-line {
  margin-top: 18px;
  color: var(--secondary);
  font-size: 13px;
}

.product-stage {
  position: relative;
  min-height: 520px;
  display: grid;
  place-items: center;
}

.product-stage::before {
  position: absolute;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(45, 198, 252, .33), rgba(73, 65, 218, .10) 55%, transparent 71%);
  filter: blur(8px);
  content: "";
}

.hero-screenshot {
  position: relative;
  width: min(100%, 680px);
  margin: 0;
  padding: 9px;
  border: 1px solid rgba(255, 255, 255, .7);
  border-radius: 25px;
  overflow: hidden;
  background: rgba(20, 24, 34, .9);
  box-shadow: 0 42px 100px rgba(29, 37, 74, .25), inset 0 1px rgba(255, 255, 255, .22);
  transform: perspective(1450px) rotateY(-5deg) rotateX(2deg);
  -webkit-backdrop-filter: blur(40px) saturate(145%);
  backdrop-filter: blur(40px) saturate(145%);
}

.product-screenshot { width: 100%; height: auto; border-radius: 18px; vertical-align: middle; }
.hero-screenshot figcaption {
  position: absolute;
  right: 22px;
  bottom: 22px;
  padding: 9px 12px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, .92);
  font-size: 12px;
  font-weight: 650;
  background: rgba(14, 17, 24, .72);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  backdrop-filter: blur(18px) saturate(130%);
}
.live-dot { width: 7px; height: 7px; border-radius: 50%; background: #27d7a1; box-shadow: 0 0 0 4px rgba(39, 215, 161, .15); }

.section { padding: 104px 0; }
.section.compact { padding: 72px 0; }
.product-tour { padding-top: 88px; }
.section-heading { max-width: 720px; margin-bottom: 42px; }
.section-heading.wide { max-width: 840px; }
.section-heading h2,
.page-hero h1 {
  margin: 13px 0 15px;
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1.04;
  letter-spacing: -.05em;
}
.section-heading p,
.page-hero p { margin: 0; color: var(--secondary); font-size: 19px; line-height: 1.58; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.card {
  padding: 28px;
  border: 1px solid var(--stroke);
  border-radius: var(--small-radius);
  background: var(--surface);
  box-shadow: 0 10px 30px rgba(47, 56, 92, .055);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  backdrop-filter: blur(18px) saturate(130%);
}
.card-icon { width: 42px; height: 42px; border-radius: 13px; display: grid; place-items: center; color: white; font-size: 19px; background: linear-gradient(135deg, var(--cyan), var(--blue) 58%, var(--indigo)); }
.card h3 { margin: 20px 0 9px; font-size: 20px; letter-spacing: -.025em; }
.card p { margin: 0; color: var(--secondary); line-height: 1.58; }
.card-icon.alternate { background: linear-gradient(135deg, #12bfa6, #0874f8 62%, #5a44dd); }

.tour-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.screen-card {
  margin: 0;
  border: 1px solid var(--stroke);
  border-radius: 24px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 18px 55px rgba(47, 56, 92, .09);
}
.screen-media { aspect-ratio: 1.48; padding: 18px 18px 0; overflow: hidden; display: grid; align-items: end; }
.screen-media.light-media { background: linear-gradient(145deg, #f8fbff, #e9f2fb); }
.screen-media.dark-media { background: linear-gradient(145deg, #171b23, #242333); }
.screen-media img { width: 100%; height: auto; border-radius: 15px 15px 0 0; box-shadow: 0 22px 45px rgba(17, 25, 47, .17); }
.screen-card figcaption { min-height: 164px; padding: 23px 24px 25px; display: flex; flex-direction: column; gap: 8px; }
.screen-card figcaption strong { font-size: 20px; letter-spacing: -.025em; }
.screen-card figcaption > span { color: var(--secondary); line-height: 1.62; }
.screenshot-disclosure { margin: 18px 4px 0; color: var(--secondary); font-size: 12px; line-height: 1.55; }

.protocol-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.protocol-cloud span { padding: 10px 14px; border: 1px solid var(--stroke); border-radius: 999px; font-size: 14px; font-weight: 650; background: var(--surface-strong); }
.fact-strip { margin-top: 38px; padding: 24px 28px; border: 1px solid var(--stroke); border-radius: 22px; display: grid; grid-template-columns: repeat(3, 1fr); background: var(--surface); }
.fact-strip > div { min-width: 0; padding: 0 24px; display: flex; align-items: center; gap: 14px; }
.fact-strip > div + div { border-left: 1px solid var(--stroke); }
.fact-strip strong { color: var(--blue); font-size: 36px; line-height: 1; letter-spacing: -.04em; }
.fact-strip span { color: var(--secondary); font-size: 13px; line-height: 1.45; }

.release-panel {
  padding: 36px;
  border: 1px solid rgba(8, 116, 248, .13);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 32px;
  background: linear-gradient(135deg, rgba(235, 250, 255, .85), rgba(242, 239, 255, .78));
  box-shadow: var(--shadow);
}
.release-panel h2 { margin: 14px 0 10px; font-size: 32px; letter-spacing: -.035em; }
.release-panel p { margin: 0; color: var(--secondary); line-height: 1.55; }

.page-hero { padding: 110px 0 54px; max-width: 800px; }
.prose { max-width: 820px; padding-bottom: 100px; }
.prose section { margin-top: 44px; }
.prose h2 { margin: 0 0 14px; font-size: 25px; letter-spacing: -.025em; }
.prose h3 { margin: 28px 0 10px; font-size: 18px; }
.prose p,
.prose li { color: var(--secondary); line-height: 1.72; }
.prose ul,
.prose ol { padding-left: 23px; }
.prose code { padding: 2px 6px; border-radius: 7px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: rgba(120, 127, 145, .12); }
.notice { margin: 30px 0; padding: 20px 22px; border: 1px solid rgba(217, 119, 6, .18); border-radius: 17px; color: #7a4904; background: rgba(255, 246, 223, .72); }
.checksum { padding: 14px 16px; overflow-wrap: anywhere; border: 1px solid var(--stroke); border-radius: 13px; color: var(--secondary); font: 13px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; background: rgba(120,127,145,.08); }

.site-footer { padding: 44px 0 52px; border-top: 1px solid var(--stroke); color: var(--secondary); font-size: 13px; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; align-items: start; gap: 30px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 18px; }
.footer-links a { text-decoration: none; }

[data-lang] { display: none; }
html[data-language="zh"] [data-lang="zh"],
html[data-language="en"] [data-lang="en"] { display: revert; }

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f5f7fb;
    --secondary: #aeb5c3;
    --surface: rgba(28, 31, 40, .68);
    --surface-strong: rgba(38, 41, 51, .84);
    --stroke: rgba(255, 255, 255, .09);
    --shadow: 0 24px 70px rgba(0, 0, 0, .31);
  }
  html { background: #11141b; }
  body { background: radial-gradient(circle at 14% 4%, rgba(21, 151, 203, .16), transparent 30rem), radial-gradient(circle at 88% 12%, rgba(90, 68, 221, .17), transparent 34rem), linear-gradient(180deg, #151821, #101219 70%); }
  .site-header { background: rgba(17, 20, 27, .7); }
  .eyebrow, .status-pill { color: #70b6ff; background: rgba(8, 75, 148, .22); }
  .release-panel { background: linear-gradient(135deg, rgba(18, 48, 64, .72), rgba(37, 28, 77, .69)); }
  .notice { color: #ffd48a; background: rgba(112, 67, 2, .24); }
}

@media (max-width: 880px) {
  .nav-links { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 84px; gap: 36px; }
  .product-stage { min-height: 440px; }
  .hero-screenshot { transform: none; }
  .grid, .grid.two { grid-template-columns: 1fr; }
  .tour-grid { grid-template-columns: 1fr; }
  .fact-strip { grid-template-columns: 1fr; }
  .fact-strip > div { padding: 14px 0; }
  .fact-strip > div + div { border-left: 0; border-top: 1px solid var(--stroke); }
  .release-panel { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  .shell, .nav { width: min(calc(100% - 28px), var(--max)); }
  .hero h1 { font-size: 50px; }
  .hero { padding-top: 68px; }
  .section { padding: 76px 0; }
  .product-stage { min-height: 350px; }
  .hero-screenshot { border-radius: 19px; padding: 6px; }
  .product-screenshot { border-radius: 13px; }
  .hero-screenshot figcaption { right: 13px; bottom: 13px; max-width: calc(100% - 26px); }
  .screen-media { padding: 10px 10px 0; }
  .screen-card figcaption { min-height: auto; padding: 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}