:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 28px; }
body { margin: 0; font-size: 15px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
[hidden] { display: none !important; }
a { color: inherit; text-underline-offset: 4px; }
a:hover { color: var(--accent); }
button { font: inherit; cursor: pointer; }
a, button, summary { touch-action: manipulation; }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
h1, h2, h3, h4, p, dl, dd { margin: 0; }
h1, h2, h3, h4 { font-weight: 600; }
h1 { font-size: clamp(30px, 3.4vw, 44px); line-height: 1.42; letter-spacing: -.025em; text-wrap: balance; }
h2 { font-size: 23px; line-height: 1.5; }
h3 { font-size: 17px; line-height: 1.5; }
p, dd, td { overflow-wrap: anywhere; }
img { display: block; }
.page { max-width: 1160px; margin: auto; padding: 0 40px; }
.skip-link { position: absolute; left: 16px; top: -100px; padding: 10px 16px; background: white; z-index: 5; }
.skip-link:focus { top: 12px; }
.site-header { min-height: 88px; display: flex; gap: 28px; align-items: center; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; white-space: nowrap; font-size: 22px; font-weight: 600; }
.brand-english { margin-left: 5px; font-size: 17px; font-weight: 500; color: var(--muted); }
nav { display: flex; gap: 24px; margin-left: auto; }
nav a { text-decoration: none; font-size: 13px; padding: 8px 0; }
.intro { display: grid; grid-template-columns: minmax(0, 1.8fr) minmax(250px, 1fr); gap: 80px; padding: 68px 0 64px; }
.release-label { color: var(--accent-hover); font-size: 13px; margin-bottom: 20px; }
.intro-description { color: var(--muted); max-width: 550px; margin-top: 22px; font-size: 16px; }
.intro-links { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 26px; margin-top: 28px; }
.button { display: inline-flex; min-height: 44px; align-items: center; padding: 8px 20px; color: white; background: var(--accent); border-radius: 6px; text-decoration: none; font-size: 14px; font-weight: 500; }
.button:hover { color: white; background: var(--accent-hover); }
.text-link { font-size: 14px; }
.project-facts { align-self: center; border-top: 1px solid var(--line); }
.project-facts > div { padding: 12px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 12px; font-size: 13px; }
dt { color: var(--muted); }
.section { padding: 42px 0 48px; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 1fr 1.8fr; align-items: start; gap: 40px; margin-bottom: 30px; }
.section-heading p { color: var(--muted); font-size: 14px; }
.component-release { border-left: 3px solid var(--accent); padding-left: 28px; }
.component-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 10px 20px; margin-bottom: 12px; }
.component-heading h3 { font: 600 21px/1.6 "SFMono-Regular", Consolas, monospace; }
.component-version { display: inline-block; color: var(--muted); font-size: 12px; font-weight: 400; }
.component-release > p { max-width: 800px; }
.component-facts { margin-top: 20px; }
.component-facts > div { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 24px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 13px; }
.component-facts dd { color: var(--muted); }
.publication-note { margin-top: 16px; color: var(--accent-hover); font-size: 13px; }
.download-links { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; margin-top: 22px; font-size: 14px; }
.distribution-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 48px; margin-top: 32px; }
.distribution-list article { border-top: 1px solid var(--line); padding-top: 20px; }
.distribution-list h3 { font-size: 15px; margin-bottom: 8px; }
.distribution-list h4 { font-size: 17px; margin-bottom: 8px; }
.distribution-list p { color: var(--muted); font-size: 13px; }
.feature-list, .feature-detail-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 48px; }
.feature-list article, .feature-detail-list article { padding: 24px 0; border-top: 1px solid var(--line); }
.feature-list h3 { margin-bottom: 10px; }
.feature-list p { font-size: 14px; color: var(--muted); }
.more-details { margin-top: 24px; border-top: 1px solid var(--line); padding-top: 16px; }
summary { cursor: pointer; font-size: 14px; color: var(--accent-hover); padding: 6px 0; }
summary:hover { color: var(--accent); }
.more-details[open] > summary { margin-bottom: 18px; }
.more-details .table-wrap { margin-top: 20px; }
.checksum { margin-top: 14px; }
.checksum summary { font-size: 12px; }
.checksum code { display: block; max-width: 100%; margin-top: 8px; font: 12px/1.8 "SFMono-Regular", Consolas, monospace; overflow-wrap: anywhere; user-select: all; }
.platform-summary > div { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.8fr); gap: 40px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 14px; }
.platform-summary dt { color: var(--ink); }
.platform-summary dd { color: var(--muted); }
.feature-heading { display: flex; align-items: baseline; gap: 12px; justify-content: space-between; margin-bottom: 12px; }
.status { flex-shrink: 0; font-size: 11px; color: var(--muted); padding: 1px 7px; border: 1px solid var(--line); border-radius: 3px; line-height: 1.8; }
.status.experimental { color: var(--accent-hover); border-color: #c7b4d9; }
.detail { margin-top: 10px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; text-align: left; }
th, td { vertical-align: top; padding: 16px 20px 16px 0; border-bottom: 1px solid var(--line); }
thead th { color: var(--muted); font-size: 12px; font-weight: 500; padding-top: 0; }
th[scope=row] { width: 110px; font-weight: 600; white-space: nowrap; }
td { width: 45%; }
td:last-child { color: var(--muted); padding-right: 0; }
.release-list { list-style: none; counter-reset: release; margin: 0; padding: 0; }
.release-list li { counter-increment: release; display: grid; grid-template-columns: 32px minmax(180px, .75fr) minmax(0, 1.7fr); gap: 24px; padding: 22px 0; border-top: 1px solid var(--line); }
.release-list li::before { content: counter(release, decimal-leading-zero); color: var(--accent); font: 13px/2 "SFMono-Regular", Consolas, monospace; }
.release-list h3 { font-size: 16px; }
.release-list p { font-size: 14px; color: var(--muted); }
.scope-note { border-left: 2px solid #b29bc5; padding: 0 0 0 18px; margin-top: 24px; color: var(--muted); font-size: 13px; }
.technical-list > div { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 36px; padding: 18px 0; border-top: 1px solid var(--line); font-size: 14px; }
.technical-list dt { color: var(--ink); font-weight: 500; }
.technical-list dd { color: var(--muted); }
.technical-links { display: flex; flex-wrap: wrap; gap: 16px 28px; margin-top: 24px; font-size: 14px; }
footer { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; padding: 26px 0 34px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
footer > span { margin-right: auto; color: var(--ink); }
.footer-engine { color: var(--muted); }
@media (max-width: 960px) {
  .site-header { gap: 20px; flex-wrap: wrap; padding: 16px 0; }
  nav { gap: 20px; order: 3; width: 100%; }
  .language-switcher { margin-left: auto; }
  .intro { gap: 36px; padding: 48px 0; grid-template-columns: minmax(0, 1.3fr) minmax(240px, 1fr); }
  .feature-list, .feature-detail-list { column-gap: 32px; }
  .feature-heading { flex-wrap: wrap; gap: 6px 12px; }
}
@media (max-width: 640px) {
  .page { padding: 0 22px; }
  .site-header { gap: 10px; }
  .brand { font-size: 21px; }
  nav { gap: 12px 22px; flex-wrap: wrap; }
  nav a { font-size: 12px; }
  .intro { grid-template-columns: 1fr; gap: 36px; padding: 36px 0; }
  .intro-description { font-size: 15px; }
  .project-facts > div { padding: 10px 0; grid-template-columns: 100px minmax(0, 1fr); }
  .section { padding: 30px 0 34px; }
  .section-heading { grid-template-columns: 1fr; gap: 10px; margin-bottom: 22px; }
  .component-release { padding-left: 16px; }
  .component-facts > div { grid-template-columns: 1fr; gap: 4px; }
  .distribution-list { grid-template-columns: 1fr; gap: 24px; }
  .feature-list, .feature-detail-list { grid-template-columns: 1fr; }
  .feature-list article, .feature-detail-list article { padding: 22px 0; }
  .feature-list article:last-child, .feature-detail-list article:last-child { padding-bottom: 0; }
  .platform-summary > div { grid-template-columns: 1fr; gap: 2px; }
  th, td { padding: 12px 12px 12px 0; font-size: 12px; }
  th[scope=row] { width: 64px; }
  .release-list li { grid-template-columns: 24px minmax(0, 1fr); gap: 6px 14px; padding: 18px 0; }
  .release-list p { grid-column: 2; }
  .technical-list > div { grid-template-columns: 1fr; gap: 8px; padding: 18px 0; }
  footer > span { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}

.roadmap-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.roadmap-summary article{border-top:1px solid var(--line);padding-top:20px}.roadmap-summary h3{margin:12px 0 9px}.roadmap-summary p{font-size:14px;color:var(--muted)}
@media(max-width:640px){.roadmap-summary{grid-template-columns:1fr;gap:22px}}
/* Nearby release and developer entry points. */
:root { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "PingFang SC", "Microsoft JhengHei", "Microsoft YaHei", sans-serif; }
.intro { grid-template-columns: minmax(0,1.35fr) minmax(0,1fr); gap: 56px; align-items: center; }
.flow-card { margin: 0; padding: 26px; background: #f2eff5; border: 1px solid #ded5e5; border-radius: 14px; }
.flow-heading { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.flow-heading .status { margin-left: auto; }
.flow-dot { width: 7px; height: 7px; background: var(--accent); border-radius: 50%; }
.flow-devices { display: flex; align-items: center; justify-content: space-evenly; gap: 16px; padding: 28px 0; }
.flow-devices > div { display: grid; justify-items: center; gap: 8px; font-size: 13px; }
.device-mark { font-size: 45px; line-height: 1; color: var(--accent-hover); }
.flow-arrow { font-size: 25px; color: var(--accent); }
.flow-row { display: flex; align-items: center; gap: 14px; padding: 11px 0; border-top: 1px solid #ded5e5; font-size: 13px; }
.step-number { font: 12px/1.5 monospace; color: var(--accent); }
.flow-card figcaption { font-size: 11px; color: #686270; padding-top: 18px; line-height: 1.7; }
.nearby-features { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 28px; }
.feature-kicker { display: block; font: 11px/1.5 monospace; color: var(--accent-hover); margin-bottom: 15px; letter-spacing: .08em; }
.sdk-contract { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; padding: 22px 0; }
.sdk-contract code { font-size: 20px; color: var(--accent-hover); }
.faq-list details { padding: 15px 0; border-top: 1px solid var(--line); }
.faq-list p { margin-top: 10px; color: var(--muted); font-size: 14px; max-width: 850px; }
.contract-card { display: grid; gap: 15px; border-left: 3px solid var(--accent); padding: 24px 28px; background: #f2eff5; border-radius: 0 12px 12px 0; }
.contract-card > code { font-size: 24px; color: var(--accent-hover); }
.contract-card > p:first-child { font-size: 13px; color: var(--muted); }
.access-steps { padding-left: 24px; }
.access-steps li { padding: 14px 0 14px 12px; }
.access-steps li::marker { color: var(--accent); }
.access-steps p { margin-top: 8px; color: var(--muted); font-size: 14px; }
.resource-row { display: flex; align-items: center; gap: 28px; justify-content: space-between; }
.resource-row a { flex-shrink: 0; font-size: 14px; }
@media (max-width: 960px) { .intro { gap: 32px; } .language-switcher { margin-left: auto; } }
@media (max-width: 720px) { .intro { grid-template-columns: 1fr; } .nearby-features { grid-template-columns: 1fr; gap: 0; } .resource-row { flex-direction: column; align-items: start; } .flow-card { padding: 22px; } }