:root {
  --bg: #07111f;
  --bg-soft: #0d1b30;
  --card: rgba(10, 22, 40, 0.78);
  --card-border: rgba(212, 175, 55, 0.16);
  --text: #eff4ff;
  --muted: #9fb1d1;
  --primary: #d4af37;
  --line: rgba(255, 255, 255, 0.08);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font: 16px/1.7 "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(212, 175, 55, 0.18), transparent 32%),
    radial-gradient(circle at top right, rgba(86, 164, 255, 0.12), transparent 28%),
    linear-gradient(180deg, #09111d 0%, #07111f 40%, #081424 100%);
}

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

img {
  display: block;
  max-width: 100%;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(7, 17, 31, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.site-header .shell,
.hero,
.section,
.site-footer .shell {
  display: flex;
  align-items: center;
}

.site-header .shell {
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

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

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 20px;
  color: #fff;
  background: linear-gradient(135deg, #f6df8a 0%, var(--primary) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4), 0 12px 28px rgba(212, 175, 55, 0.3);
}

.brand-copy strong,
.brand-copy span {
  display: block;
}

.brand-copy strong {
  font-size: 18px;
  letter-spacing: 0.04em;
}

.brand-copy span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

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

.nav a {
  color: var(--muted);
  transition: color 0.2s ease;
}

.nav a:hover {
  color: #fff;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #0a1322;
  background: linear-gradient(135deg, #f6df8a 0%, var(--primary) 100%);
  box-shadow: 0 14px 32px rgba(212, 175, 55, 0.26);
}

.btn-secondary {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.hero-wrap {
  overflow: hidden;
}

.hero {
  align-items: stretch;
  justify-content: space-between;
  gap: 40px;
  padding: 84px 0 52px;
}

.hero-copy {
  flex: 1 1 560px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  color: #f5deb3;
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid rgba(212, 175, 55, 0.22);
  font-size: 13px;
}

.hero h1 {
  margin: 18px 0 16px;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.08;
  letter-spacing: 0.02em;
}

.hero p {
  margin: 0;
  max-width: 680px;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions,
.hero-points,
.stat-grid,
.feature-grid,
.scene-grid,
.faq-list,
.footer-links {
  display: grid;
}

.hero-actions {
  margin-top: 28px;
  grid-template-columns: repeat(2, minmax(0, max-content));
  gap: 14px;
}

.hero-points {
  margin-top: 26px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.point-card,
.stat-card,
.feature-card,
.scene-card,
.faq-item,
.showcase-card {
  border: 1px solid var(--card-border);
  background: var(--card);
  box-shadow: var(--shadow);
}

.point-card {
  padding: 16px 18px;
  border-radius: 22px;
}

.point-card strong,
.stat-card strong,
.feature-card strong,
.scene-card strong {
  display: block;
}

.point-card strong {
  margin-bottom: 6px;
  font-size: 14px;
}

.point-card span {
  color: var(--muted);
  font-size: 13px;
}

.hero-side {
  flex: 0 0 380px;
  display: flex;
}

.showcase-card {
  width: 100%;
  padding: 26px;
  border-radius: 28px;
  position: relative;
  overflow: hidden;
}

.showcase-card::after {
  content: "";
  position: absolute;
  inset: auto -48px -48px auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.22) 0%, rgba(212, 175, 55, 0) 72%);
}

.showcase-card h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.showcase-card p {
  margin: 0;
  color: var(--muted);
}

.stat-grid,
.feature-grid,
.scene-grid,
.faq-list {
  gap: 18px;
}

.stat-grid {
  margin-top: 28px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat-card,
.feature-card,
.scene-card,
.faq-item {
  padding: 22px;
  border-radius: 24px;
}

.stat-card strong {
  font-size: 28px;
  line-height: 1.1;
}

.stat-card span,
.feature-card p,
.scene-card p,
.faq-item p,
.section-copy p {
  color: var(--muted);
}

.section {
  flex-direction: column;
  align-items: stretch;
  padding: 32px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 24px;
}

.section-copy h2 {
  margin: 0 0 8px;
  font-size: clamp(26px, 4vw, 40px);
}

.section-copy p {
  margin: 0;
  max-width: 720px;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card strong,
.scene-card strong,
.faq-item strong {
  margin-bottom: 8px;
  font-size: 18px;
}

.feature-card p,
.scene-card p,
.faq-item p {
  margin: 0;
}

.scene-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(86, 164, 255, 0.08);
  color: #b9d6ff;
  font-size: 12px;
  border: 1px solid rgba(86, 164, 255, 0.16);
}

.faq-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.section-cta {
  margin-top: 26px;
  padding: 28px;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.18) 0%, rgba(15, 33, 58, 0.94) 100%);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

.section-cta h3 {
  margin: 0 0 6px;
  font-size: 22px;
}

.section-cta p {
  margin: 0;
  color: #d7e1f5;
}

.site-footer {
  margin-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-footer .shell {
  justify-content: space-between;
  gap: 18px;
  min-height: 88px;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  grid-auto-flow: column;
  gap: 18px;
}

.page-404 {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 0;
}

.page-404 .showcase-card {
  max-width: 720px;
}

.page-404 h1 {
  margin: 0 0 12px;
  font-size: clamp(42px, 8vw, 86px);
  line-height: 1;
}

.page-404 .lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 17px;
}

@media (max-width: 1024px) {
  .hero,
  .section-cta,
  .site-footer .shell {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-side,
  .hero-copy {
    flex-basis: auto;
    width: 100%;
  }

  .feature-grid,
  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header .shell {
    min-height: 64px;
  }

  .nav {
    display: none;
  }

  .hero {
    padding: 56px 0 30px;
  }

  .hero-actions,
  .hero-points,
  .stat-grid,
  .feature-grid,
  .scene-grid,
  .faq-list {
    grid-template-columns: 1fr;
  }

  .section,
  .site-footer {
    padding-top: 24px;
  }

  .section-head {
    align-items: flex-start;
  }

  .footer-links {
    grid-auto-flow: row;
    gap: 10px;
  }
}