:root {
  --bg: #0b0d12;
  --panel: #12151d;
  --line: #232838;
  --fg: #e8ecf4;
  --muted: #8f9bb3;
  --accent: #5b8cff;
  --ok: #3ddc97;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Noto Sans CJK SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: 100%; max-width: 940px; margin: 0 auto; padding: 0 24px; }

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

/* header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(11, 13, 18, .85);
  backdrop-filter: saturate(160%) blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 600; }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: grid; place-items: center;
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, #5b8cff, #8f6bff);
  font-size: 12px; font-weight: 700; color: #fff; letter-spacing: .5px;
}
.brand-tag {
  font-size: 11px; font-weight: 500; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px;
}
.site-nav { display: flex; gap: 22px; font-size: 14px; }
.site-nav a { color: var(--muted); }
.site-nav a:hover { color: var(--fg); text-decoration: none; }

/* hero */
.hero { padding: 88px 0 56px; }
.eyebrow {
  margin: 0 0 14px; font-size: 12px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--accent); font-weight: 600;
}
.hero h1 {
  margin: 0 0 18px; font-size: clamp(34px, 6vw, 54px);
  line-height: 1.15; letter-spacing: -.02em; font-weight: 700;
}
.lede { margin: 0; max-width: 620px; color: var(--muted); font-size: 17px; }
.cta { margin-top: 34px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 10px;
  font-size: 15px; font-weight: 500; border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: #6d99ff; }
.btn.ghost { border-color: var(--line); color: var(--fg); }
.btn.ghost:hover { border-color: #37405a; }

/* stats */
.stats { padding: 8px 0 56px; }
.grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 20px;
}
.card .k { font-size: 12px; color: var(--muted); letter-spacing: .06em; }
.card .v { font-size: 20px; font-weight: 650; margin: 6px 0 4px; }
.card .v.ok { color: var(--ok); }
.card .d { font-size: 13px; color: var(--muted); }

/* prose */
.prose { padding: 8px 0 80px; border-top: 1px solid var(--line); }
.prose h2 { font-size: 20px; margin: 38px 0 12px; letter-spacing: -.01em; }
.prose p { margin: 0 0 14px; color: var(--muted); max-width: 680px; }

/* footer */
.site-footer {
  border-top: 1px solid var(--line); padding: 26px 0;
  font-size: 13px; color: var(--muted);
}
.site-footer .dot { margin: 0 8px; opacity: .5; }