:root {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  color-scheme: light dark;
  background: #080b11;
  color: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(2rem, 6vw, 5rem) clamp(1.5rem, 4vw, 3rem);
  background: radial-gradient(circle at 20% 20%, rgba(56, 189, 248, 0.2), transparent 55%),
              radial-gradient(circle at 80% 0%, rgba(99, 102, 241, 0.25), transparent 60%),
              linear-gradient(160deg, #0f172a, #020617 70%);
}

main {
  width: min(1100px, 100%);
  display: grid;
  gap: clamp(1.8rem, 4vw, 2.6rem);
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 22px;
  padding: clamp(2rem, 6vw, 4rem);
  box-shadow: 0 40px 120px rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(16px);
}

header {
  display: grid;
  gap: 0.8rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(148, 163, 184, 0.8);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.15;
  font-weight: 700;
  color: #f8fafc;
}

.intro {
  margin: 0;
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.7;
  color: rgba(226, 232, 240, 0.88);
  max-width: 60ch;
}

.status-strip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: rgba(20, 30, 48, 0.7);
  border: 1px solid rgba(51, 65, 85, 0.5);
  font-size: 0.85rem;
  color: rgba(148, 163, 184, 0.95);
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: linear-gradient(120deg, #34d399, #22c55e);
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.15);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(1.2rem, 3vw, 1.8rem);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.6rem;
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.85));
  border: 1px solid rgba(148, 163, 184, 0.16);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(94, 234, 212, 0.5);
  box-shadow: 0 25px 60px rgba(14, 165, 233, 0.25);
}

.badge {
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.16);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: #7dd3fc;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.card h2 {
  margin: 0;
  font-size: 1.35rem;
  color: #f1f5f9;
}

.card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(203, 213, 225, 0.9);
}

.card footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.88rem;
  color: rgba(148, 163, 184, 0.95);
}

.card a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  border-radius: 12px;
  background: linear-gradient(130deg, #38bdf8, #2563eb);
  color: #f8fafc;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 0 18px 35px rgba(37, 99, 235, 0.28);
}

.card a:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 40px rgba(37, 99, 235, 0.35);
}

.cta-section {
  display: grid;
  gap: 0.8rem;
  padding: 1.6rem;
  border-radius: 18px;
  background: linear-gradient(150deg, rgba(17, 24, 39, 0.92), rgba(30, 58, 138, 0.75));
  border: 1px solid rgba(99, 102, 241, 0.28);
  text-align: center;
}

.cta-section h3 {
  margin: 0;
  font-size: 1.2rem;
  color: #eef2ff;
}

.cta-section p {
  margin: 0;
  font-size: 0.95rem;
  color: rgba(199, 210, 254, 0.88);
}

footer.page-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: rgba(148, 163, 184, 0.85);
}

footer.page-footer a {
  color: rgba(96, 165, 250, 0.9);
  text-decoration: none;
}

@media (max-width: 640px) {
  body {
    padding: 1.5rem;
  }

  main {
    padding: clamp(1.4rem, 4vw, 2rem);
  }

  footer.page-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}