:root {
  --bg: #0a0f1c;
  --panel: #101a2e;
  --panel-2: #0d1526;
  --text: #e8eef9;
  --muted: #93a4bf;
  --accent: #3dd6c0;
  --accent-2: #7aa7ff;
  --border: #1d2a44;
  --radius: 14px;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 70% -10%, #12224a 0%, var(--bg) 55%);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

header.site {
  border-bottom: 1px solid var(--border);
  background: rgba(10, 15, 28, .72);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .2px; color: var(--text); }
.brand svg { width: 26px; height: 26px; }
.nav a.link { color: var(--muted); font-size: 14px; }
.nav a.link:hover { color: var(--text); text-decoration: none; }
.nav .spacer { flex: 1; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #06201c; }
.btn.primary:hover { filter: brightness(1.05); }

.hero {
  padding: 84px 0 56px;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .3px;
  text-transform: uppercase;
}
.badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(61, 214, 192, .12);
}

h1 { font-size: clamp(34px, 5vw, 54px); line-height: 1.12; letter-spacing: -1.2px; margin: 18px 0 16px; }
.lead { color: var(--muted); font-size: 18px; max-width: 560px; }
.actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }

.term {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .35);
}
.term .bar { display: flex; gap: 7px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.term .bar i { width: 10px; height: 10px; border-radius: 50%; background: #2a3a58; }
.term pre {
  margin: 0;
  padding: 20px;
  font: 13px/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: #cfe0f7;
  overflow-x: auto;
}
.term .ok { color: var(--accent); }
.term .dim { color: var(--muted); }

section { padding: 56px 0; border-top: 1px solid var(--border); }
h2 { font-size: 28px; letter-spacing: -.5px; margin: 0 0 8px; }
.sub { color: var(--muted); margin: 0 0 28px; }

.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: rgba(61, 214, 192, .1);
  color: var(--accent);
  margin-bottom: 14px;
}
.icon svg { width: 18px; height: 18px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
td code { color: var(--accent); }

footer.site { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: 13px; }
footer .row { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
footer .spacer { flex: 1; }

.page { padding: 56px 0; }
.page h1 { font-size: 38px; }
.page h2 { font-size: 22px; margin-top: 34px; }
.page p, .page li { color: var(--muted); }
.page code { color: var(--accent); }
.note {
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  background: rgba(61, 214, 192, .06);
  border-radius: 0 10px 10px 0;
  color: var(--muted);
}

pre.code {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  font: 13px/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: #cfe0f7;
}

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 56px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .nav a.link { display: none; }
}
@media (max-width: 520px) {
  .grid { grid-template-columns: 1fr; }
  h1 { font-size: 34px; }
}