:root {
  color-scheme: dark;
  --bg: #101110;
  --panel: #181a17;
  --ink: #f4f3ea;
  --muted: #bcbbb0;
  --line: #36372f;
  --accent: #ffe015;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.7; }
a { color: inherit; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
.wrap { width: min(1200px, calc(100% - 80px)); margin-inline: auto; }
.skip { position: absolute; top: .75rem; left: .75rem; padding: .5rem 1rem; background: var(--accent); color: #151510; transform: translateY(-200%); }
.skip:focus { transform: none; }
.site-header, .site-footer { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.site-header { min-height: 78px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: .65rem; font-weight: 760; letter-spacing: .13em; text-decoration: none; white-space: nowrap; }
.brand img { border-radius: 7px; }
nav { display: flex; gap: clamp(.85rem, 4vw, 2rem); font-size: .9rem; }
nav a, .site-footer a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current], .site-footer a:hover { color: var(--accent); }
.hero { display: grid; grid-template-columns: minmax(0, .84fr) minmax(0, 1.16fr); align-items: center; gap: clamp(1.5rem, 4vw, 4.2rem); padding-block: clamp(3rem, 8vw, 7rem); }
.eyebrow { display: flex; align-items: center; gap: .5rem; color: var(--accent); font-size: .78rem; letter-spacing: .15em; font-weight: 740; margin: 0 0 1rem; }
.signal { display: inline-block; width: .55rem; height: .55rem; background: var(--accent); border-radius: 50%; flex: none; }
h1, h2, h3 { line-height: 1.13; margin: 0; }
h1 { font-size: clamp(2.7rem, 6.1vw, 5.4rem); letter-spacing: -.065em; font-weight: 780; }
.intro { color: var(--muted); font-size: clamp(1.02rem, 1.75vw, 1.22rem); margin: 1.4rem 0 1.7rem; }
.action { display: inline-flex; gap: 1.15rem; justify-content: space-between; align-items: center; padding: .7rem 1.05rem; background: var(--accent); color: #121210; font-weight: 740; text-decoration: none; border-radius: 5px; }
.action:hover { background: #ffec72; }
.hero-image { margin: 0; border: 1px solid var(--line); background: var(--panel); }
.hero-image img { width: 100%; height: auto; display: block; }
.hero-image figcaption { display: flex; align-items: center; gap: .55rem; padding: .62rem .85rem; color: var(--muted); font-size: .75rem; }
.hero-image .signal { width: .4rem; height: .4rem; }
.workflow { border-top: 1px solid var(--line); padding-block: 3.75rem; }
h2 { font-size: clamp(1.55rem, 3.1vw, 2.35rem); }
.features { display: grid; grid-template-columns: repeat(3,1fr); gap: clamp(1rem, 3vw, 2.5rem); margin-top: 2.25rem; }
.features article { border-top: 1px solid var(--line); padding-top: 1rem; }
.index { color: var(--accent); font: 700 .85rem ui-monospace, monospace; display: block; margin-bottom: .8rem; }
h3 { font-size: 1.25rem; }
.features p, .reading section p, .steps { color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); min-height: 78px; font-size: .85rem; }
.site-footer a { white-space: nowrap; }
.reading { max-width: 820px; padding-block: clamp(3rem, 6vw, 6rem); }
.reading h1 { font-size: clamp(2.5rem, 6vw, 4.6rem); }
.reading section { border-top: 1px solid var(--line); padding-top: 1.6rem; margin-top: 2.25rem; }
.reading h2 { font-size: 1.55rem; }
.steps { padding-left: 1.45rem; }
.steps li + li { margin-top: .45rem; }
details { border-bottom: 1px solid var(--line); padding: .9rem 0; }
details:first-of-type { margin-top: .6rem; }
summary { font-weight: 680; cursor: pointer; }
details p { margin: .65rem 0 .15rem; }
.reading a { color: var(--accent); }
@media (max-width: 760px) {
  .wrap { width: calc(100% - 36px); }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { max-width: 32rem; }
  .features { grid-template-columns: 1fr; }
  .site-header { min-height: 64px; }
}
@media (max-width: 350px) {
  .wrap { width: calc(100% - 24px); }
  nav { gap: .6rem; font-size: .78rem; }
}
.site-footer .record { font-variant-numeric: tabular-nums; }
@media (max-width: 600px) {
  .site-footer { flex-wrap: wrap; justify-content: flex-start; gap: .55rem 1rem; padding-block: 1rem; }
  .site-footer p { flex-basis: 100%; margin: 0; }
}