:root {
  color-scheme: dark;
  --canvas: #0a0a0a;
  --surface-soft: #111;
  --surface-card: #1a1a1a;
  --surface-elevated: #242424;
  --hairline: #2a2a2a;
  --hairline-strong: #3a3a3a;
  --text: #fff;
  --body: #ccc;
  --body-strong: #e8e8e8;
  --muted: #888;
  --muted-soft: #5a5a5a;
  --primary: #3f8cff;
  --primary-active: #2f7df2;
  --primary-soft: rgba(63, 140, 255, 0.16);
  --on-primary: #07111f;
  --success: #22c55e;
  --max: 1280px;
  --section: 96px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    linear-gradient(rgba(255, 255, 255, 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.026) 1px, transparent 1px),
    radial-gradient(circle at 78% 8%, rgba(63, 140, 255, 0.2), transparent 360px),
    var(--canvas);
  background-size: 32px 32px, 32px 32px, auto, auto;
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background: linear-gradient(180deg, transparent 0%, rgba(10, 10, 10, 0.72) 42%, var(--canvas) 100%);
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scanLine {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(360%);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  width: 100%;
  height: 64px;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(20px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid var(--hairline);
  background: rgba(10, 10, 10, 0.88);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 24px rgba(63, 140, 255, 0.16);
}

.brand-copy strong,
.brand-copy small {
  display: block;
  line-height: 1;
}

.brand-copy strong {
  font-size: 15px;
  font-weight: 700;
}

.brand-copy small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 9px 12px;
  border-radius: var(--radius-md);
  color: var(--body);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text);
  background: var(--surface-card);
}

.github-link {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  color: var(--text);
  background: var(--surface-card);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.github-link:hover {
  border-color: var(--primary);
}

.github-link svg {
  flex: 0 0 auto;
}

.language-toggle {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  color: var(--body-strong);
  background: transparent;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.language-toggle:hover {
  border-color: var(--primary);
  color: var(--text);
}

.language-divider {
  color: var(--muted-soft);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  background: var(--surface-card);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(360px, 5fr);
  gap: 48px 32px;
  align-items: center;
  padding: var(--section) 0 56px;
}

.hero-copy,
.code-window,
.stat-strip,
.product-shot {
  animation: riseIn 680ms ease both;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(48px, 7vw, 86px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4.5vw, 58px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
}

.hero-lede,
.section-heading p,
.virtual-band p {
  max-width: 680px;
  color: var(--body);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.62;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  border-color: var(--primary);
  color: var(--on-primary);
  background: var(--primary);
}

.button.primary:hover {
  background: var(--primary-active);
}

.button.secondary {
  color: var(--text);
  background: var(--surface-card);
}

.button.inverse {
  border-color: #050505;
  color: var(--text);
  background: #050505;
}

.code-window,
.command-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--surface-card);
}

.code-window::after {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.24;
  background: linear-gradient(180deg, transparent, rgba(63, 140, 255, 0.36), transparent);
  animation: scanLine 5s linear infinite;
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--hairline);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.window-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--hairline-strong);
}

.window-bar span:first-child {
  background: var(--primary);
}

.window-bar strong {
  margin-left: auto;
}

pre {
  margin: 0;
  overflow-x: auto;
}

code {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 14px;
  line-height: 1.6;
}

.code-window pre {
  padding: 24px;
}

.code-window code {
  color: var(--body-strong);
}

.code-muted {
  color: var(--primary);
}

.stat-strip {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--hairline);
}

.stat-strip dt {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
}

.stat-strip dd {
  margin: 0;
  color: var(--primary);
  font-size: clamp(30px, 4.2vw, 56px);
  font-weight: 700;
  line-height: 1;
}

.product-shot {
  grid-column: 1 / -1;
  margin: 0;
}

.product-shot img {
  width: 100%;
  height: auto;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--surface-card);
}

.product-shot figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.quickstart,
.section-block {
  padding: var(--section) 0;
  border-top: 1px solid var(--hairline);
}

.download-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: 28px;
  align-items: stretch;
  padding: 56px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(63, 140, 255, 0.18), transparent 48%),
    var(--surface-card);
}

.download-copy {
  align-self: center;
}

.download-copy h2 {
  max-width: 720px;
}

.download-copy p:last-child {
  max-width: 620px;
  margin: 0;
  color: var(--body);
  font-size: 18px;
  line-height: 1.62;
}

.download-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-lg);
  background: rgba(5, 5, 5, 0.64);
}

.download-card span {
  width: fit-content;
  padding: 7px 10px;
  border: 1px solid rgba(63, 140, 255, 0.34);
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.download-card strong {
  display: block;
  color: var(--text);
  font-size: 24px;
  line-height: 1.2;
}

.download-card p {
  margin: 0;
  color: var(--body);
  font-size: 15px;
  line-height: 1.58;
}

.quickstart {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 24px;
}

.quickstart-lead,
.step-grid li,
.feature-card,
.flow-grid article {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--surface-card);
}

.quickstart-lead {
  padding: 28px;
}

.quickstart-lead h2 {
  margin: 0;
  font-size: 36px;
}

.step-grid,
.feature-grid,
.flow-grid,
.usage-layout {
  display: grid;
  gap: 16px;
}

.step-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 0;
  margin: 0;
  list-style: none;
}

.step-grid li {
  min-width: 0;
  padding: 28px;
}

.step-grid span,
.feature-card span,
.flow-grid span {
  display: block;
  margin-bottom: 26px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.step-grid strong {
  display: block;
  margin-bottom: 12px;
  font-size: 22px;
  font-weight: 700;
}

.step-grid p,
.feature-card p,
.flow-grid p {
  margin: 0;
  color: var(--body);
  font-size: 16px;
  line-height: 1.58;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  min-height: 260px;
  padding: 32px;
}

.feature-card-blue {
  border-color: var(--primary);
  color: var(--on-primary);
  background: var(--primary);
}

.feature-card-blue span,
.feature-card-blue p {
  color: var(--on-primary);
}

.architecture {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 56px;
  align-items: start;
}

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

.flow-grid article {
  padding: 28px 32px;
}

.usage-layout {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.command-card {
  min-width: 0;
  padding: 24px;
}

.command-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  margin-bottom: 18px;
}

.command-head .eyebrow,
.command-head h3 {
  grid-column: 1;
}

.command-head h3 {
  margin: 0;
}

.copy-button {
  grid-row: 1 / span 2;
  grid-column: 2;
  min-height: 36px;
  padding: 8px 14px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  color: var(--text);
  background: var(--surface-elevated);
  cursor: pointer;
}

.command-card pre {
  padding: 18px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  background: #050505;
}

.command-card code {
  color: var(--body-strong);
  overflow-wrap: anywhere;
}

.quality-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.quality-row span {
  padding: 9px 12px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  color: var(--body-strong);
  background: var(--surface-card);
  font-size: 13px;
  font-weight: 600;
}

.virtual-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: end;
  padding: 64px;
  border: 0;
  border-radius: var(--radius-lg);
  color: var(--on-primary);
  background: var(--primary);
}

.virtual-band .eyebrow,
.virtual-band p {
  color: var(--on-primary);
}

.virtual-band h2 {
  max-width: 760px;
}

.site-footer {
  display: flex;
  min-height: 96px;
  align-items: center;
  gap: 20px;
  justify-content: space-between;
  border-top: 1px solid var(--hairline);
  color: var(--muted);
  font-size: 14px;
}

.site-footer strong {
  color: var(--text);
}

.site-footer a {
  color: var(--body-strong);
  font-weight: 600;
  text-decoration: none;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms ease, transform 620ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .hero,
  .download-band,
  .quickstart,
  .architecture,
  .usage-layout,
  .virtual-band {
    grid-template-columns: 1fr;
  }

  .code-window {
    max-width: 680px;
  }

  .step-grid,
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .virtual-band {
    padding: 40px;
  }

  .download-card .button,
  .virtual-band .button {
    justify-self: start;
  }
}

@media (max-width: 760px) {
  .site-header {
    padding: 0 14px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    right: 12px;
    left: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    background: var(--surface-card);
  }

  .site-nav.is-open {
    display: flex;
  }

  .github-link span {
    display: none;
  }

  .github-link {
    width: 40px;
    justify-content: center;
    padding: 0;
  }

  .language-toggle {
    width: 52px;
    justify-content: center;
    padding: 0;
  }

  main,
  .site-footer {
    width: min(calc(100% - 24px), var(--max));
  }

  .hero {
    padding-top: 64px;
  }

  h1 {
    font-size: clamp(38px, 12vw, 54px);
  }

  h2 {
    font-size: clamp(30px, 10vw, 42px);
  }

  .hero-lede,
  .section-heading p,
  .virtual-band p {
    font-size: 16px;
  }

  .stat-strip,
  .step-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .quickstart,
  .section-block {
    padding: 72px 0;
  }

  .download-band {
    padding: 24px;
  }

  .feature-card,
  .download-card,
  .step-grid li,
  .flow-grid article,
  .command-card {
    padding: 24px;
  }

  .hero-actions,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .code-window pre {
    white-space: pre-wrap;
  }

  .code-window code {
    overflow-wrap: anywhere;
  }
}