:root {
  --bg: #0b0f14;
  --bg-elevated: #121820;
  --text: #e8edf4;
  --text-muted: #8b9cb3;
  --accent: #3dd6c3;
  --accent-dim: rgba(61, 214, 195, 0.15);
  --border: rgba(139, 156, 179, 0.18);
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 10px;
  --max: 640px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(139, 156, 179, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 156, 179, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black 20%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.glow {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}

.glow-1 {
  top: -120px;
  right: -80px;
  background: var(--accent);
}

.glow-2 {
  bottom: -160px;
  left: -100px;
  background: #5b8def;
  opacity: 0.2;
}

.site-header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.logo:hover {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 0.25rem;
}

.nav-link {
  font-size: 0.9rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius);
  color: var(--text-muted);
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.nav-link--active {
  color: var(--text);
  background: var(--accent-dim);
  border: 1px solid rgba(61, 214, 195, 0.25);
}

.main {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin: 0 0 1rem;
}

.title {
  font-size: clamp(1.85rem, 4vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0 0 1.25rem;
}

.title-accent {
  color: var(--accent);
}

.lead {
  color: var(--text-muted);
  margin: 0 0 1.5rem;
}

.facts {
  margin: 0 0 2rem;
  padding-left: 1.15rem;
  color: var(--text-muted);
}

.facts li {
  margin-bottom: 0.5rem;
}

.facts li::marker {
  color: var(--accent);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.15rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #041210;
  box-shadow: 0 0 0 1px rgba(61, 214, 195, 0.4), 0 12px 32px rgba(61, 214, 195, 0.2);
}

.btn-primary:hover {
  box-shadow: 0 0 0 1px rgba(61, 214, 195, 0.55), 0 16px 40px rgba(61, 214, 195, 0.28);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: rgba(139, 156, 179, 0.35);
  background: rgba(255, 255, 255, 0.03);
}

.site-footer {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.65rem 1.25rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.site-footer__beian {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.site-footer__beian:hover {
  color: var(--accent);
  text-decoration: underline;
}