:root {
  color-scheme: dark;
  --bg: #09111e;
  --bg-soft: #101d32;
  --surface: rgba(8, 17, 31, 0.78);
  --surface-strong: rgba(14, 27, 45, 0.94);
  --line: rgba(148, 163, 184, 0.2);
  --text: #e2e8f0;
  --text-soft: #cbd5e1;
  --muted: #94a3b8;
  --primary: #38bdf8;
  --primary-strong: #0ea5e9;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(56, 189, 248, 0.18), transparent 28%),
    radial-gradient(circle at left 20%, rgba(59, 130, 246, 0.12), transparent 30%),
    linear-gradient(180deg, #07101c, #0a1424 55%, #0c1626);
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: #7dd3fc;
}

.marketing-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.site-header,
.site-footer,
.hero-panel,
.content-card {
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: blur(18px);
  box-shadow: 0 24px 80px rgba(2, 6, 23, 0.32);
}

.site-header,
.site-footer {
  border-radius: 24px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 22px;
  align-items: center;
  margin-bottom: 24px;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  display: inline-flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, #0ea5e9, #2563eb);
  color: white;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-name {
  color: white;
  font-size: 1.05rem;
  font-weight: 700;
}

.brand-subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-nav {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.nav-cta,
.button-primary {
  color: white;
  background: linear-gradient(135deg, var(--primary-strong), #2563eb);
  box-shadow: 0 18px 36px rgba(14, 165, 233, 0.22);
}

.button-secondary {
  color: var(--text);
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid rgba(148, 163, 184, 0.24);
}

.nav-cta:hover,
.button:hover {
  transform: translateY(-1px);
}

.page-main {
  display: grid;
  gap: 24px;
}

.hero-panel {
  border-radius: 32px;
  padding: 48px;
}

.eyebrow {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(125, 211, 252, 0.12);
  color: #7dd3fc;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 0.82rem;
}

.hero-panel h1 {
  margin: 18px 0 16px;
  font-size: clamp(2.4rem, 4vw, 4.4rem);
  line-height: 1.05;
}

.hero-copy {
  max-width: 820px;
  color: var(--text-soft);
  font-size: 1.08rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.hero-meta {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.content-stack {
  display: grid;
  gap: 24px;
}

.content-card {
  border-radius: 28px;
  padding: 28px;
}

.content-card-wide {
  grid-column: 1 / -1;
}

.content-card h2 {
  margin: 0 0 14px;
  font-size: 1.4rem;
}

.content-card p,
.content-card li {
  color: var(--text-soft);
  line-height: 1.8;
}

.content-card ul {
  margin: 0;
  padding-left: 20px;
}

.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer {
  margin-top: 28px;
  padding: 22px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.site-footer p {
  margin: 8px 0 0;
  color: var(--muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .site-header,
  .site-footer,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .site-header,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-panel {
    padding: 32px 24px;
  }

  .marketing-shell {
    width: min(100% - 24px, 1180px);
  }
}