:root {
  color-scheme: dark;
  --bg: #07111f;
  --surface: #0d1b2e;
  --line: #1d3856;
  --text: #eff7ff;
  --muted: #a8bad0;
  --blue: #46b9ff;
  --blue-dark: #1677c2;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.7 Inter, "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--blue); }
.wrap { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 5; border-bottom: 1px solid rgba(168, 186, 208, .18); background: rgba(7, 17, 31, .92); backdrop-filter: blur(14px); }
.site-header .wrap, .site-footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 72px; }
.brand { font-size: 18px; font-weight: 800; letter-spacing: .02em; white-space: nowrap; }
.brand span { color: var(--blue); }
nav { display: flex; flex-wrap: wrap; gap: 20px; color: var(--muted); font-size: 14px; }
.button { display: inline-block; padding: 10px 18px; border: 1px solid var(--blue); border-radius: 8px; background: var(--blue); color: #04111f; font-weight: 700; }
.button:hover { background: #8ad7ff; color: #04111f; }
.button--quiet { background: transparent; color: var(--blue); }
.hero { padding: 110px 0 78px; background: radial-gradient(circle at 72% 10%, rgba(46, 167, 255, .25), transparent 32%), linear-gradient(135deg, #081a30, #07111f 62%); }
.eyebrow { margin: 0 0 14px; color: var(--blue); font-size: 14px; font-weight: 700; letter-spacing: .08em; }
h1, h2, h3 { line-height: 1.25; }
h1 { max-width: 860px; margin: 0; font-size: clamp(38px, 6vw, 66px); letter-spacing: -.04em; }
h2 { margin: 0 0 18px; font-size: clamp(26px, 4vw, 38px); }
h3 { margin: 0 0 8px; font-size: 20px; }
.lead { max-width: 750px; margin: 22px 0 30px; color: var(--muted); font-size: 19px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.section { padding: 74px 0; }
.section--surface { background: var(--surface); border-block: 1px solid var(--line); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid--two { grid-template-columns: repeat(2, 1fr); }
.card { padding: 26px; border: 1px solid var(--line); border-radius: 12px; background: rgba(8, 26, 48, .58); }
.card p, .prose p, .prose li { color: var(--muted); }
.card p { margin-bottom: 0; }
.meta { color: var(--muted); }
.prose { width: min(100%, 820px); }
.prose h2 { margin-top: 48px; }
.prose h3 { margin-top: 28px; }
.prose code { display: block; overflow-x: auto; margin: 18px 0; padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: #040b14; color: #cbeeff; font: 14px/1.65 ui-monospace, Consolas, monospace; white-space: pre; }
.faq details { padding: 18px 0; border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { color: var(--muted); }
.site-footer { margin-top: 50px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.site-footer .wrap { justify-content: flex-start; flex-wrap: wrap; }
.site-footer nav { margin-left: auto; }
@media (max-width: 760px) {
  .site-header .wrap { min-height: 64px; align-items: flex-start; padding-block: 14px; }
  .site-header nav { gap: 10px 16px; }
  .hero { padding: 78px 0 56px; }
  .grid, .grid--two { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
  .site-footer .wrap { padding-block: 20px; }
  .site-footer nav { margin-left: 0; }
}