:root {
  color-scheme: dark;
  --bg: #07110f;
  --bg-soft: #0c1916;
  --panel: #10221e;
  --panel-strong: #142b26;
  --line: #26473e;
  --text: #f1f7f4;
  --muted: #abc3ba;
  --accent: #72e6b1;
  --accent-strong: #98f5c9;
  --ink: #072018;
  --warm: #ffd58a;
  --max: 1180px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 82% 5%, rgba(40, 132, 102, 0.28), transparent 30rem),
    radial-gradient(circle at 14% 19%, rgba(80, 112, 91, 0.16), transparent 27rem),
    var(--bg);
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--accent-strong);
  text-underline-offset: 0.2em;
}

a:hover {
  color: #c3ffe1;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--warm);
  outline-offset: 4px;
  border-radius: 0.2rem;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 1rem;
  left: 1rem;
  padding: 0.65rem 0.9rem;
  color: var(--ink);
  background: var(--warm);
  font-weight: 800;
  transform: translateY(-180%);
}

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

.site-header,
main,
footer {
  width: min(calc(100% - 2.5rem), var(--max));
  margin-inline: auto;
}

.site-header {
  min-height: 5.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-bottom: 1px solid rgba(114, 230, 177, 0.18);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
  color: var(--text);
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 2.15rem;
  height: 2.15rem;
  display: grid;
  place-items: center;
  border: 1px solid #4d8d79;
  border-radius: 0.55rem;
  color: var(--accent);
  background: rgba(114, 230, 177, 0.08);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2vw, 1.55rem);
}

nav a {
  color: var(--muted);
  font-size: 0.91rem;
  font-weight: 650;
  text-decoration: none;
}

.nav-cta {
  padding: 0.48rem 0.78rem;
  border: 1px solid #4d8d79;
  border-radius: 999px;
  color: var(--accent-strong);
}

.hero {
  min-height: 43rem;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(25rem, 0.96fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 6.5rem);
  padding: 6rem 0 5rem;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 12ch;
  margin-bottom: 1.4rem;
  font-size: clamp(3.05rem, 6.4vw, 5.8rem);
  font-weight: 770;
}

h2 {
  max-width: 18ch;
  margin-bottom: 1.25rem;
  font-size: clamp(2rem, 4vw, 3.55rem);
  font-weight: 740;
}

h3 {
  margin-bottom: 0.7rem;
  font-size: 1.22rem;
}

.lede {
  max-width: 61ch;
  margin-bottom: 2rem;
  color: #c4d6cf;
  font-size: clamp(1.05rem, 1.7vw, 1.22rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1rem;
  border: 1px solid transparent;
  border-radius: 0.55rem;
  font-size: 0.93rem;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  color: var(--ink);
  background: var(--accent);
}

.button.primary:hover {
  color: #03110d;
  background: #a5f6d0;
}

.button.secondary {
  border-color: #3c665a;
  color: var(--text);
  background: rgba(255, 255, 255, 0.025);
}

.proof {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.45rem;
  margin: 1.65rem 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.82rem;
  list-style: none;
}

.proof li::before {
  content: "✓";
  margin-right: 0.45rem;
  color: var(--accent);
  font-weight: 900;
}

.product-preview {
  overflow: hidden;
  border: 1px solid #31584c;
  border-radius: 0.8rem;
  background: #091310;
  box-shadow: 0 2.2rem 5.5rem rgba(0, 0, 0, 0.34);
  transform: rotate(1deg);
}

.preview-bar {
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0 1rem;
  border-bottom: 1px solid #24453b;
  color: #86a79b;
  background: #0e1d19;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
}

.preview-bar span:last-child {
  margin-left: 0.4rem;
}

.preview-dot {
  width: 0.52rem;
  height: 0.52rem;
  border-radius: 50%;
  background: #47665d;
}

.preview-body {
  padding: 1.25rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.74rem;
}

.preview-row {
  display: grid;
  grid-template-columns: 1.15fr 0.72fr 1fr;
  gap: 0.8rem;
  padding: 0.68rem 0.45rem;
  border-bottom: 1px solid #1c352e;
  color: #bad0c8;
}

.preview-row strong {
  color: var(--accent);
}

.preview-head {
  color: #739086;
  font-size: 0.64rem;
  letter-spacing: 0.1em;
}

.status {
  width: 0.45rem;
  height: 0.45rem;
  display: inline-block;
  margin-right: 0.45rem;
  border-radius: 50%;
}

.status.working {
  background: var(--accent);
  box-shadow: 0 0 0.65rem rgba(114, 230, 177, 0.65);
}

.status.waiting {
  background: var(--warm);
}

.event-line {
  margin-top: 1rem;
  color: #8da89e;
}

.event-line + .event-line {
  margin-top: 0.45rem;
}

.event-line b {
  color: #617c72;
  font-weight: 500;
}

.event-line em {
  color: #d9e7e2;
  font-style: normal;
}

.statement {
  padding: 2.5rem clamp(1.4rem, 5vw, 4rem);
  border-block: 1px solid var(--line);
  color: #dcebe6;
  text-align: center;
}

.statement p {
  max-width: 42ch;
  margin: 0 auto;
  font-size: clamp(1.35rem, 3vw, 2.15rem);
  font-weight: 630;
  line-height: 1.35;
  letter-spacing: -0.025em;
}

.section {
  padding: clamp(5rem, 10vw, 8.5rem) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 2rem;
}

.section-heading {
  max-width: 47rem;
  margin-bottom: 3rem;
}

.section-heading > p:last-child,
.security > div > p {
  color: var(--muted);
  font-size: 1.05rem;
}

.architecture-grid,
.card-grid,
.support-grid {
  display: grid;
  gap: 1rem;
}

.architecture-grid {
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: item;
}

.architecture-grid li,
.card-grid article,
.support-grid article {
  min-width: 0;
  padding: 1.65rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: linear-gradient(145deg, rgba(20, 43, 38, 0.86), rgba(11, 25, 21, 0.76));
}

.architecture-grid p,
.card-grid p,
.support-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.step {
  display: block;
  margin-bottom: 3.2rem;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 800;
}

.card-grid {
  grid-template-columns: repeat(2, 1fr);
}

.card-icon {
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  margin-bottom: 2.5rem;
  border: 1px solid #426f62;
  border-radius: 50%;
  color: var(--accent);
  font-size: 1.25rem;
}

.install {
  display: grid;
  grid-template-columns: minmax(16rem, 0.72fr) minmax(24rem, 1.28fr);
  gap: clamp(2rem, 7vw, 6rem);
}

.commands > div {
  margin-bottom: 1rem;
}

.commands p {
  margin-bottom: 0.45rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 750;
}

pre {
  margin: 0;
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid #31584c;
  border-radius: 0.5rem;
  color: #d9f7e9;
  background: #050d0b;
  font-size: 0.79rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.install-links {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.2rem;
  margin: 0;
  font-size: 0.85rem;
}

.security {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: center;
  gap: clamp(3rem, 10vw, 8rem);
}

.boundary-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.boundary-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.88rem;
}

.boundary-list span {
  color: var(--muted);
}

.boundary-list strong {
  color: var(--accent-strong);
  text-align: right;
}

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

.support-grid strong {
  color: var(--text);
}

.chinese-summary {
  max-width: 58rem;
  margin-inline: auto;
  text-align: center;
}

.chinese-summary h2 {
  max-width: none;
}

.chinese-summary > p:not(.eyebrow) {
  color: #c4d6cf;
  font-size: 1.08rem;
}

.chinese-summary .hero-actions {
  justify-content: center;
  margin-top: 2rem;
}

footer {
  min-height: 8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  color: var(--muted);
  font-size: 0.83rem;
}

footer p {
  margin: 0;
}

@media (max-width: 900px) {
  .site-header {
    padding: 1rem 0;
    align-items: flex-start;
  }

  .site-header nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .site-header nav a:not(.nav-cta):not([lang]) {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 4.5rem;
  }

  h1 {
    max-width: 13ch;
  }

  .product-preview {
    max-width: 42rem;
    transform: none;
  }

  .architecture-grid,
  .support-grid {
    grid-template-columns: 1fr;
  }

  .install,
  .security {
    grid-template-columns: 1fr;
  }

  .install-links {
    grid-column: 1;
  }
}

@media (max-width: 600px) {
  .site-header,
  main,
  footer {
    width: min(calc(100% - 1.5rem), var(--max));
  }

  .brand > span:last-child {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 3.7rem 0;
  }

  h1 {
    font-size: clamp(2.7rem, 14vw, 4rem);
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .preview-body {
    padding: 0.85rem;
    font-size: 0.68rem;
  }

  .preview-row {
    grid-template-columns: 1.15fr 0.72fr 0.9fr;
    gap: 0.4rem;
  }

  .boundary-list li,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  footer {
    justify-content: center;
    padding: 2rem 0;
  }

  footer nav {
    flex-wrap: wrap;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}