:root {
  --bg: #0b1020;
  --bg2: #0f1730;
  --card: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8edf7;
  --muted: #9aa6c0;
  --accent: #5eead4;
  --accent2: #818cf8;
  --primary: linear-gradient(135deg, #5eead4, #818cf8);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(1200px 600px at 70% -10%, #1b2750 0%, var(--bg) 55%) fixed;
  color: var(--text);
  line-height: 1.6;
}

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

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
  backdrop-filter: blur(10px);
  background: rgba(11, 16, 32, 0.6);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.logo { width: 28px; height: 28px; border-radius: 8px; }
.links { display: flex; align-items: center; gap: 18px; color: var(--muted); }
.links a:hover { color: var(--text); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 12px; font-weight: 600;
  border: 1px solid var(--border); transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--primary); color: #07111f; border: none; box-shadow: 0 8px 24px rgba(94, 234, 212, 0.25); }
.btn.small { padding: 7px 14px; border-radius: 10px; }
.btn.small:hover { background: rgba(255,255,255,0.06); }

/* Hero */
.hero { padding: 80px 24px 48px; text-align: center; }
.hero-inner { max-width: 820px; margin: 0 auto; }
.badge {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  background: rgba(94, 234, 212, 0.12); color: var(--accent);
  border: 1px solid rgba(94, 234, 212, 0.3); font-size: 14px; font-weight: 600;
}
.hero h1 { font-size: clamp(32px, 6vw, 56px); margin: 18px 0 10px; line-height: 1.1; }
.accent {
  background: var(--primary); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.subtitle { color: var(--muted); font-size: 18px; margin: 0 auto 28px; max-width: 640px; }
.hero-actions { display: flex; gap: 16px; align-items: center; justify-content: center; flex-wrap: wrap; }
.meta { color: var(--muted); font-size: 14px; }
.hero-meta {
  list-style: none; display: flex; gap: 22px; justify-content: center; flex-wrap: wrap;
  padding: 0; margin: 34px 0 0; color: var(--muted); font-size: 14px;
}
.hero-meta b { color: var(--text); }

/* Sections */
.section { max-width: 980px; margin: 0 auto; padding: 56px 24px; }
.section h2 { font-size: 28px; margin: 0 0 26px; text-align: center; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 22px; transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-3px); border-color: rgba(94,234,212,0.4); }
.card .ico { font-size: 32px; margin-bottom: 8px; }
.card h3 { margin: 6px 0; font-size: 18px; }
.card p { color: var(--muted); margin: 0; font-size: 15px; }

.steps { max-width: 720px; margin: 0 auto; padding-left: 22px; color: var(--muted); }
.steps li { margin: 12px 0; }
.steps b { color: var(--text); }
.steps code, .changelog-box code { background: rgba(255,255,255,0.06); padding: 2px 6px; border-radius: 6px; font-size: 14px; }

.changelog-box {
  max-width: 720px; margin: 0 auto; background: var(--card);
  border: 1px solid var(--border); border-radius: 16px; padding: 22px 26px;
}
.cl-date { color: var(--accent); font-weight: 600; margin-top: 0; }
#changelog { color: var(--text); margin-bottom: 0; }

/* Footer */
.footer { text-align: center; color: var(--muted); padding: 40px 24px; border-top: 1px solid var(--border); font-size: 14px; }

@media (max-width: 600px) {
  .links a:not(.btn) { display: none; }
  .hero { padding-top: 56px; }
}