:root {
  color-scheme: light;
  --bg: #ffffff;
  --panel: #f6f7f8;
  --text: #22252a;
  --muted: #626974;
  --line: #dfe2e6;
  --link: #285ba5;
  --accent: #22252a;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 88px; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.55; }
a { color: var(--link); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: #173d73; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--link); outline-offset: 5px; }
h1, h2, h3, p, figure { margin: 0; }
h1 { font-size: 19.2px; font-weight: 650; line-height: 1.4; margin: 32px 0 20px; }
h2 { font-size: 20px; line-height: 1.4; margin-bottom: 16px; font-weight: 700; }
h3 { font-size: 16px; line-height: 1.5; margin-bottom: 8px; font-weight: 650; }
p + p { margin-top: 16px; }
img { display: block; max-width: 100%; height: auto; }
[hidden] { display: none !important; }
.page-width { width: min(768px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 16px; z-index: 20; padding: 10px 16px; background: var(--text); color: var(--bg); }
.skip-link:focus { top: 8px; }
.product-strip { background: var(--panel); border-bottom: 1px solid var(--line); }
.product-strip > .page-width { display: flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 30px; overflow-x: auto; scrollbar-width: none; }
.product-strip > .page-width::-webkit-scrollbar { display: none; }
.product-strip a { color: var(--muted); font-size: 12px; text-decoration: none; white-space: nowrap; }
.product-strip a:hover, .product-strip [aria-current="page"] { color: var(--accent); }
.product-strip [aria-current="page"] { font-weight: 650; }
.site-header { position: sticky; top: 0; z-index: 10; background: var(--bg); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 64px; display: flex; align-items: center; gap: 10px; padding-block: 10px; }
.header-inner > div { display: flex; align-items: baseline; gap: 10px; }
.wordmark { color: var(--text); text-decoration: none; font-size: 20px; font-weight: 700; letter-spacing: -.045em; line-height: 1.1; white-space: nowrap; }
.byline { color: var(--muted); font-size: 10px; white-space: nowrap; text-decoration: none; }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 34px; padding: 6px 15px; border: 1px solid var(--text); border-radius: 10px; background: var(--text); color: #fff; text-decoration: none; font-size: 13px; font-weight: 650; line-height: 1.5; }
.button:hover { background: #414750; border-color: #414750; color: #fff; }
.button.secondary { color: var(--text); border-color: #e9ebee; background: #e9ebee; }
.button.secondary:hover { border-color: #dce0e5; background: #dce0e5; color: var(--text); }
.button.outline { color: var(--text); border-color: var(--line); background: transparent; }
.button.outline:hover { border-color: #a1a8b2; background: var(--panel); }
.media-placeholder { display: grid; place-items: center; width: 100%; aspect-ratio: 16 / 9; padding: 20px; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; color: var(--muted); font-size: 12px; text-align: center; }
.cover { margin-top: 32px; margin-bottom: 38px; }
.category { display: inline-block; padding: 0 6px; border: 1px solid var(--line); color: var(--muted); background: var(--panel); font-size: 12px; font-weight: 650; line-height: 1.5; letter-spacing: .06em; }
.intro > p:not(.category) { margin-bottom: 16px; }
.availability, .product-detail { color: var(--muted); font-size: 14px; }
.product-overview h3 { font-size: 18px; }
.resources-section { margin-top: 58px; margin-bottom: 48px; padding-top: 34px; border-top: 1px solid var(--line); }
.resources-section h2 { margin-top: 16px; }
.resource-options { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 26px; }
.resource-options > div { border-top: 1px solid var(--line); padding-top: 20px; }
.resource-options p { font-size: 14px; }
.comparison-table { width: 100%; margin-top: 18px; border-collapse: collapse; font-size: 14px; }
.comparison-table th, .comparison-table td { padding: 12px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison-table thead { background: var(--panel); }
.comparison-table td, .comparison-table th:not(:first-child) { white-space: nowrap; }
.content-section { margin-top: 44px; }
.media-caption { margin-top: 16px; color: var(--muted); font-style: italic; }
.media-row { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 22px; margin-top: 30px; }
.media-row > div { min-width: 0; }
.media-row.reverse > .media-placeholder { grid-column: 2; grid-row: 1; }
.media-row.reverse > div:not(.media-placeholder) { grid-column: 1; grid-row: 1; }
.feature-list, .link-list { padding-left: 22px; margin: 12px 0 0; }
.feature-list li, .link-list li { margin-block: 7px; }
.compatibility { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; margin-bottom: 18px; padding: 12px 15px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); font-size: 14px; }
.compatibility span { color: var(--muted); }
.content-section ol { padding-left: 23px; }
.content-section ol li { margin-block: 10px; }
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-size: 15px; }
.faq details p { color: var(--muted); margin-top: 12px; font-size: 14px; }
.download-panel { margin-block: 44px 48px; padding: 26px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.download-panel h2 { margin-bottom: 12px; }
.download-panel > p { color: var(--muted); font-size: 14px; }
.release-label { margin: 12px 0; color: var(--muted); font-size: 14px; }
.site-footer { padding-block: 26px 40px; border-top: 1px solid var(--line); }
.site-footer p { color: var(--muted); font-size: 12px; margin-top: 12px; }
.site-footer > a:not(.wordmark) { font-size: 12px; }
.site-footer > a + a { margin-left: 18px; }
@media (max-width: 700px) {
  .header-inner { flex-wrap: wrap; gap: 7px 10px; }
  .header-actions { margin-left: auto; }
  .wordmark { font-size: 17px; }
  .byline { font-size: 9px; }
  .button { padding: 6px 11px; font-size: 12px; }
}
@media (max-width: 560px) {
  html { scroll-padding-top: 118px; }
  .product-strip > .page-width { gap: 24px; justify-content: start; }
  .header-inner { padding-block: 12px; }
  .header-actions { flex-basis: 100%; margin-top: 4px; }
  .cover { margin-top: 22px; margin-bottom: 26px; }
  h1 { font-size: 18px; margin-top: 24px; }
  .media-row { grid-template-columns: 1fr; gap: 15px; }
  .resource-options { grid-template-columns: 1fr; }
  .resources-section { margin-top: 40px; }
  .comparison-table th, .comparison-table td { padding: 10px 6px; }
  .media-row.reverse > .media-placeholder, .media-row.reverse > div:not(.media-placeholder) { grid-column: auto; grid-row: auto; }
  .content-section { margin-top: 34px; }
  .download-panel { padding: 20px; }
}