:root {
  color-scheme: dark light;
  --bg: #0b1019;
  --surface: #111924;
  --raised: #182230;
  --ink: #eef3f8;
  --muted: #a9b8c8;
  --line: #2a3747;
  --accent: #78ddfa;
  --bright: #acbdff;
  --button: #8de4fb;
  --on-button: #0c2633;
  --grid: rgba(130, 172, 203, 0.05);
  --shadow: 0 22px 58px #0005;
  font:
    16px/1.55 "Segoe UI Variable Text",
    "Segoe UI",
    "Microsoft YaHei UI",
    system-ui,
    sans-serif;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --surface: #fff;
    --raised: #eaf0f6;
    --ink: #142235;
    --muted: #4c6074;
    --line: #cfdae4;
    --accent: #006787;
    --bright: #4148a0;
    --button: #075e80;
    --on-button: #fff;
    --grid: rgba(63, 91, 128, 0.07);
    --shadow: 0 20px 52px #1c30491c;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}
a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}
a:hover {
  text-decoration: underline;
}
a:focus-visible,
summary:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}
svg {
  width: 1.12em;
  height: 1.12em;
  flex: none;
}
img {
  max-width: 100%;
}
.wrap {
  width: min(1248px, calc(100% - 96px));
  margin-inline: auto;
}
.skip {
  position: absolute;
  left: 1rem;
  top: -5rem;
  background: var(--button);
  color: var(--on-button);
  padding: 0.5rem;
  z-index: 9;
}
.skip:focus {
  top: 0.5rem;
}
.mast {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.mast-inner,
.brand,
.mast nav,
.mast-end,
.actions,
.button,
.project-line,
.project-line div,
.resource-links,
.footer-inner,
.foot-links,
.file-meta,
.breadcrumbs,
.shot-caption,
.shot-caption span,
.origin-link,
.source-link,
.search-link {
  display: flex;
  align-items: center;
}
.mast-inner {
  height: 68px;
  gap: 46px;
}
.brand {
  gap: 10px;
  color: var(--ink);
  font-weight: 650;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand:hover {
  text-decoration: none;
}
.mast nav {
  gap: 30px;
}
.mast nav a,
.mast-end a {
  font-size: 0.9rem;
  font-weight: 550;
  color: var(--muted);
  text-decoration: none;
}
.mast nav a:hover,
.mast-end a:hover,
.mast nav a[aria-current="page"] {
  color: var(--ink);
}
.mast nav a[aria-current="page"] {
  border-bottom: 2px solid var(--accent);
  padding-block: 20px 18px;
}
.mast-end {
  margin-left: auto;
  gap: 16px;
}
.mast-end .lang {
  color: var(--ink);
  font-size: 0.78rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 3px 9px;
}
.git,
.features a,
.project-line a {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}
.hero {
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    radial-gradient(
      ellipse at 82% 31%,
      color-mix(in srgb, var(--bright) 10%, transparent),
      transparent 62%
    );
  background-size:
    42px 42px,
    42px 42px,
    auto;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.3fr);
  align-items: center;
  gap: clamp(28px, 4vw, 70px);
  padding-block: clamp(62px, 8vw, 112px);
}
.eyebrow,
.shot-caption,
.version-pill,
.file-meta,
.meta span {
  font-family: Consolas, "SFMono-Regular", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.11em;
}
.eyebrow {
  color: var(--accent);
  font-weight: 650;
  display: flex;
  align-items: center;
  gap: 9px;
}
.eyebrow b,
.shot-caption b {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}
h1,
h2,
h3,
p,
figure {
  margin: 0;
}
.hero h1 {
  font-size: clamp(3.4rem, 5.8vw, 5.3rem);
  line-height: 1.08;
  letter-spacing: -0.055em;
  font-weight: 590;
  margin: 20px 0 19px;
}
.hero h1 span {
  color: var(--accent);
  letter-spacing: -0.045em;
}
.lead {
  font-size: clamp(1rem, 1.35vw, 1.2rem);
  line-height: 1.8;
  color: var(--muted);
  max-width: 43rem;
}
.actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.button {
  border-radius: 8px;
  min-height: 44px;
  justify-content: center;
  gap: 9px;
  padding: 10px 19px;
  text-decoration: none;
  font-size: 0.95rem;
  line-height: 1.35;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
}
.button:hover {
  text-decoration: none;
  filter: brightness(1.08);
}
.primary {
  background: var(--button);
  color: var(--on-button);
  border: 1px solid var(--button);
}
.outline {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}
.meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  margin-top: 15px;
  font-size: 0.79rem;
}
.meta span,
.version-pill {
  letter-spacing: 0.025em;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 7px;
}
.product-shot {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 11px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.shot-caption {
  justify-content: space-between;
  color: var(--muted);
  padding: 9px 13px;
  font-size: 0.65rem;
  border-bottom: 1px solid var(--line);
}
.shot-caption span {
  gap: 7px;
}
.shot-caption b {
  width: 5px;
  height: 5px;
}
.product-shot a,
.product-shot img {
  width: 100%;
  height: auto;
  display: block;
}
.section-intro {
  margin-bottom: 25px;
}
.section-intro h2,
.subpage h1,
.paper h1 {
  margin-top: 10px;
  line-height: 1.16;
  letter-spacing: -0.035em;
}
.section-intro h2 {
  font-size: clamp(1.75rem, 3vw, 2.6rem);
}
.feature-section {
  padding-block: 54px 40px;
}
.features,
.packages {
  display: grid;
  gap: 16px;
}
.features {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.feature,
.package {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: 24px;
}
.feature i,
.package-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--raised);
  color: var(--accent);
}
.feature i svg,
.package-icon svg {
  width: 21px;
  height: 21px;
}
.feature h3 {
  font-size: 1.25rem;
  margin: 18px 0 7px;
}
.feature p,
.package p {
  color: var(--muted);
  line-height: 1.75;
}
.feature a,
.project-line a,
.resource-links a,
.origin-link,
.source-link {
  font-size: 0.88rem;
  text-decoration: none;
  font-weight: 550;
}
.feature a {
  margin-top: 16px;
}
.project-line {
  border-top: 1px solid var(--line);
  justify-content: space-between;
  padding-block: 20px 40px;
  gap: 16px;
}
.project-line div {
  gap: 12px;
}
.project-line span,
footer p {
  font-size: 0.8rem;
  color: var(--muted);
}
footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.footer-inner {
  justify-content: space-between;
  gap: 22px;
  padding-block: 27px;
}
.foot-links {
  gap: 20px;
  flex-wrap: wrap;
}
.foot-links a,
footer p a {
  color: var(--muted);
  font-size: 0.82rem;
  text-decoration: none;
}
footer p {
  margin-top: 7px;
}
footer .brand img {
  width: 24px;
  height: 24px;
}
footer .brand {
  font-size: 1rem;
}
.subpage,
.paper {
  padding-block: 58px 75px;
  min-height: calc(100vh - 179px);
}
.subpage h1,
.paper h1 {
  font-size: clamp(2.3rem, 5vw, 4.1rem);
  margin-bottom: 14px;
}
.packages {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 32px;
}
.package {
  padding: 28px;
  min-width: 0;
}
.package-icon {
  float: right;
}
.package .eyebrow {
  font-size: 0.68rem;
  margin-top: 4px;
}
.package h2 {
  margin: 14px 0 6px;
  font-size: 1.65rem;
}
.package p {
  min-height: 3.5em;
}
.package .button {
  display: inline-flex;
  margin: 15px 12px 16px 0;
}
.origin-link {
  display: inline-flex;
}
.file-meta {
  justify-content: space-between;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 13px;
  gap: 6px;
  letter-spacing: 0;
  color: var(--muted);
}
.package details {
  font-size: 0.82rem;
  margin-top: 8px;
}
.package summary,
.mobile-nav summary {
  cursor: pointer;
}
.digest {
  word-break: break-all;
}
.resource-links {
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 22px;
}
.paper {
  max-width: 850px;
}
.docs-shell {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr) 150px;
  gap: 36px;
  align-items: start;
}
.doc-nav,
.toc {
  position: sticky;
  top: 0;
  max-height: 100vh;
  overflow: auto;
  padding-block: 28px 35px;
}
.doc-nav strong {
  display: block;
  font-size: 1.38rem;
  margin: 5px 0 8px;
}
.version-pill {
  display: inline-block;
  color: var(--muted);
}
.search-link {
  gap: 7px;
  margin-top: 16px;
}
.doc-nav a,
.mobile-nav a,
.toc a {
  display: block;
  font-size: 0.86rem;
  text-decoration: none;
  color: var(--muted);
  padding: 4px 6px;
  overflow-wrap: anywhere;
}
.doc-nav h3,
.mobile-nav h3 {
  font-size: 0.82rem;
  margin: 15px 4px 4px;
}
.doc-nav .index-link {
  margin-top: 13px;
}
.doc-nav a[aria-current="page"],
.mobile-nav a[aria-current="page"] {
  color: var(--accent);
  background: var(--raised);
  border-radius: 5px;
}
.doc-nav .dev-ref {
  margin-top: 18px;
  color: var(--accent);
}
.doc-center {
  padding-block: 32px 55px;
  min-width: 0;
}
.breadcrumbs {
  gap: 8px;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 16px;
}
.mobile-nav {
  display: none;
}
.toc {
  font-size: 0.8rem;
}
.toc a {
  margin-block: 4px;
}
.prose {
  line-height: 1.85;
  overflow-wrap: anywhere;
}
.prose h1 {
  line-height: 1.2;
  font-size: 2.3rem;
  margin: 0 0 20px;
  letter-spacing: -0.04em;
}
.prose h2 {
  margin: 32px 0 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 1.55rem;
}
.prose h3 {
  margin: 23px 0 7px;
}
.prose p,
.prose ul,
.prose ol,
.prose pre,
.prose table {
  margin: 12px 0;
}
.prose blockquote {
  border-left: 3px solid var(--accent);
  margin: 15px 0;
  padding-left: 15px;
  color: var(--muted);
}
code {
  font-family: Consolas, monospace;
}
.prose :not(pre) > code {
  font-size: 0.88em;
  background: var(--raised);
  border-radius: 4px;
  padding: 1px 4px;
}
.prose pre {
  background: var(--raised);
  border-radius: 8px;
  border: 1px solid var(--line);
  padding: 14px;
  overflow: auto;
  line-height: 1.5;
  font-size: 0.85rem;
}
.prose table {
  border-collapse: collapse;
  display: block;
  max-width: 100%;
  overflow: auto;
  font-size: 0.9rem;
}
.prose th,
.prose td {
  padding: 8px 10px;
  border: 1px solid var(--line);
  text-align: left;
}
.prose th {
  background: var(--raised);
}
.source-link {
  display: inline-flex;
  gap: 5px;
  margin-top: 25px;
}
.search-form {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 24px 0;
}
.search-form input {
  min-width: 0;
  flex: 1;
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 9px;
  border-radius: 7px;
}
.search-results {
  list-style: none;
  padding: 0;
}
.search-results li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.search-results p {
  color: var(--muted);
  font-size: 0.9rem;
}
.paper > .eyebrow {
  margin-bottom: 16px;
}
@media (max-width: 1080px) {
  .wrap {
    width: calc(100% - 48px);
  }
  .docs-shell {
    grid-template-columns: 185px minmax(0, 1fr);
    gap: 24px;
  }
  .toc {
    display: none;
  }
  .hero-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 22px;
  }
  .mast-inner {
    gap: 30px;
  }
}
@media (max-width: 760px) {
  .wrap {
    width: calc(100% - 32px);
  }
  .mast-inner {
    height: 58px;
    gap: 18px;
  }
  .mast nav {
    gap: 14px;
  }
  .mast nav a[aria-current="page"] {
    padding-block: 16px 14px;
  }
  .mast-end {
    gap: 8px;
  }
  .git {
    font-size: 0 !important;
  }
  .git svg {
    font-size: 16px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    padding-block: 40px;
    gap: 26px;
  }
  .hero h1 {
    font-size: clamp(3.25rem, 10vw, 4rem);
    margin: 13px 0;
  }
  .hero h1 br {
    display: none;
  }
  .hero h1 span:before {
    content: " ";
  }
  .hero .lead {
    max-width: 34rem;
  }
  .actions {
    margin-top: 18px;
  }
  .product-shot {
    max-width: 600px;
  }
  .features,
  .packages {
    grid-template-columns: 1fr;
  }
  .feature-section {
    padding-block: 34px 24px;
  }
  .feature,
  .package {
    padding: 19px;
  }
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
  .foot-links {
    gap: 12px;
  }
  .subpage,
  .paper {
    padding-block: 32px 45px;
  }
  .docs-shell {
    display: block;
  }
  .doc-nav {
    display: none;
  }
  .mobile-nav {
    display: block;
    background: var(--raised);
    padding: 10px 12px;
    border-radius: 6px;
    margin: 0 0 15px;
  }
  .doc-center {
    padding-top: 17px;
  }
  .project-line {
    flex-wrap: wrap;
  }
  .brand {
    gap: 6px;
    font-size: 1.06rem;
  }
  .brand img {
    width: 26px;
    height: 26px;
  }
}
@media (max-width: 410px) {
  .mast-inner {
    gap: 12px;
  }
  .mast nav {
    gap: 9px;
  }
  .mast nav a {
    font-size: 0.8rem;
  }
  .mast-end {
    gap: 6px;
  }
  .hero h1 {
    font-size: 2.8rem;
  }
  .feature-section .eyebrow,
  .shot-caption {
    letter-spacing: 0.05em;
  }
}

.requirements {
  max-width: 820px;
  margin-top: 28px;
}