:root {
  color-scheme: dark;
  --bg: #080a10;
  --card: #121622;
  --line: rgba(255, 255, 255, .1);
  --text: #f5f7ff;
  --muted: #a8afc2;
  --accent: #8c7cff;
  --accent-2: #50d6c2;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 15% -10%, rgba(140, 124, 255, .22), transparent 34rem),
    radial-gradient(circle at 95% 10%, rgba(80, 214, 194, .12), transparent 28rem),
    var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Segoe UI", sans-serif;
}

a { color: #a99cff; text-underline-offset: 3px; }
a:hover { color: #c5bcff; }

.shell { width: min(880px, calc(100% - 36px)); margin: 0 auto; }

header {
  position: sticky;
  top: 0;
  z-index: 2;
  background: rgba(8, 10, 16, .82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

nav { min-height: 64px; display: flex; align-items: center; gap: 22px; }
.brand { margin-right: auto; color: var(--text); font-size: 18px; font-weight: 760; text-decoration: none; }
nav a:not(.brand) { color: var(--muted); font-size: 14px; text-decoration: none; }
nav a[aria-current="page"] { color: var(--text); }

main { padding: 72px 0 80px; }
.eyebrow { color: var(--accent-2); font-size: 13px; font-weight: 720; letter-spacing: .09em; text-transform: uppercase; }
h1 { margin: 10px 0 14px; font-size: clamp(36px, 7vw, 62px); line-height: 1.08; letter-spacing: -.035em; }
.lead { max-width: 680px; margin: 0; color: var(--muted); font-size: 18px; }
.updated { margin: 18px 0 42px; color: var(--muted); font-size: 14px; }

.card {
  margin: 18px 0;
  padding: 26px 28px;
  background: linear-gradient(145deg, rgba(22, 27, 43, .94), rgba(15, 18, 29, .94));
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 18px 70px rgba(0, 0, 0, .22);
}

h2 { margin: 0 0 12px; font-size: 22px; letter-spacing: -.015em; }
h3 { margin: 24px 0 8px; font-size: 17px; }
p { margin: 9px 0; }
ul, ol { margin: 8px 0 8px 1.2em; padding: 0; }
li + li { margin-top: 7px; }
.public-links { overflow-wrap: anywhere; }
.muted, .en { color: var(--muted); }
.en { border-top: 1px solid var(--line); margin-top: 18px; padding-top: 18px; }
.contact { display: inline-flex; align-items: center; margin-top: 8px; padding: 10px 15px; border-radius: 999px; background: rgba(140, 124, 255, .14); text-decoration: none; font-weight: 650; }

.faq summary { cursor: pointer; font-weight: 680; }
.faq details + details { border-top: 1px solid var(--line); margin-top: 15px; padding-top: 15px; }

footer { padding: 26px 0 42px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }

@media (max-width: 640px) {
  .shell { width: min(100% - 24px, 880px); }
  nav { gap: 12px; overflow-x: auto; }
  nav a:not(.brand) { white-space: nowrap; }
  main { padding-top: 48px; }
  .card { padding: 21px 19px; border-radius: 17px; }
}