:root {
  --bg: #0e1116;
  --bg-soft: #151a22;
  --card: #1a2130;
  --card-hover: #212a3c;
  --border: #2a3446;
  --text: #e6ebf2;
  --text-dim: #9aa7b8;
  --accent: #4da3ff;
  --accent-2: #7b5cff;
  --radius: 14px;
  --wrap: 1080px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(77, 163, 255, .14), transparent 60%),
    radial-gradient(1000px 500px at 90% 0%, rgba(123, 92, 255, .12), transparent 55%),
    var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC",
        "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }

code {
  background: rgba(255, 255, 255, .06);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: .9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(14, 17, 22, .72);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  font-size: 26px;
  line-height: 1;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(77,163,255,.20), rgba(123,92,255,.20));
  border: 1px solid var(--border);
}
.brand-text h1 { margin: 0; font-size: 18px; letter-spacing: .3px; }
.brand-text p { margin: 2px 0 0; font-size: 12.5px; color: var(--text-dim); }
.site-nav { display: flex; gap: 6px; }
.site-nav a {
  padding: 7px 12px;
  border-radius: 9px;
  font-size: 14px;
  color: var(--text-dim);
  transition: background .16s, color .16s;
}
.site-nav a:hover { background: var(--card); color: var(--text); }

/* ---------- main ---------- */
main { flex: 1; padding: 34px 0 56px; }

.hero {
  padding: 26px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0));
}
.hero h2 { margin: 0 0 8px; font-size: 22px; line-height: 1.4; }
.hero p { margin: 0; color: var(--text-dim); font-size: 14.5px; }

.section { margin-top: 38px; }
.section-head {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px;
}
.section-head h3 { margin: 0; font-size: 17px; }
.tag {
  font-size: 11.5px;
  color: var(--accent);
  border: 1px solid rgba(77,163,255,.35);
  background: rgba(77,163,255,.10);
  padding: 2px 9px;
  border-radius: 999px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 14px;
}
.card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  transition: transform .16s ease, background .16s, border-color .16s;
}
.card:hover { background: var(--card-hover); border-color: #3a465c; }
.card-icon { font-size: 22px; line-height: 1; margin-bottom: 6px; }
.card-title { font-weight: 600; font-size: 15px; }
.card-desc { font-size: 13px; color: var(--text-dim); }
.card.is-soon { opacity: .72; cursor: not-allowed; }
.card.is-soon:hover { transform: none; background: var(--card); border-color: var(--border); }

.about {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
  padding: 18px 20px;
}
.about p { margin: 6px 0; color: var(--text-dim); font-size: 14.5px; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  color: var(--text-dim);
  font-size: 13px;
}
.site-footer .wrap { display: flex; align-items: center; gap: 8px; }
.dot { opacity: .5; }

@media (max-width: 560px) {
  .site-nav { display: none; }
  .hero h2 { font-size: 19px; }
  main { padding-top: 22px; }
}