* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: #f5f7fb;
  background:
    radial-gradient(circle at top, rgba(55, 110, 255, 0.25), transparent 35%),
    linear-gradient(135deg, #07111f 0%, #0f1f36 45%, #16345c 100%);
}

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

.page-shell {
  min-height: 100vh;
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

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

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-copy strong {
  font-size: 18px;
}

.brand-copy span,
.site-footer {
  color: rgba(245, 247, 251, 0.72);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
}

.site-nav a {
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: #ffffff;
}

.hero-section {
  flex: 1;
  margin: 32px 0;
  padding: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 32px;
  background: rgba(8, 17, 32, 0.48);
  backdrop-filter: blur(14px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.eyebrow {
  margin: 0 0 16px;
  color: #90b6ff;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-section h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.15;
}

.hero-text {
  width: min(680px, 100%);
  margin: 20px 0 0;
  color: rgba(245, 247, 251, 0.78);
  font-size: 18px;
  line-height: 1.8;
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.action-button {
  min-width: 180px;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 16px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.action-button:hover {
  transform: translateY(-2px);
}

.primary {
  background: linear-gradient(135deg, #4a8dff 0%, #7b61ff 100%);
  box-shadow: 0 12px 30px rgba(74, 141, 255, 0.35);
}

.site-footer {
  font-size: 13px;
}

@media (max-width: 768px) {
  .page-shell {
    padding: 18px;
  }

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

  .site-footer {
    flex-direction: column;
    align-items: center;
  }

  .site-nav {
    gap: 16px;
    flex-wrap: wrap;
  }

  .hero-section {
    padding: 36px 22px;
    align-items: flex-start;
    text-align: left;
  }

  .hero-text {
    font-size: 16px;
  }

  .hero-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .action-button {
    width: 100%;
    text-align: center;
  }
}