* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #0f172a;
  background: #f3f4f6;
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar {
  background: #0f172a;
  color: #e5e7eb;
  font-size: 0.85rem;
}

.topbar-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 6px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar a {
  color: #e5e7eb;
}

header.main-header {
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.logo span {
  color: #2563eb;
}

.tagline {
  font-size: 0.96rem;
  color: #4b5563;
  max-width: 460px;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.badge {
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid #e5e7eb;
  background: #f9fafb;
  color: #374151;
}

nav.main-nav a {
  margin-left: 16px;
  font-size: 0.92rem;
  font-weight: 500;
  color: #111827;
}

nav.main-nav a:first-child {
  margin-left: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: #2563eb;
  color: #ffffff;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-ghost {
  background: transparent;
  color: #2563eb;
  border-color: #bfdbfe;
}

.btn-ghost:hover {
  background: #eff6ff;
}

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 40px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: center;
  margin-bottom: 40px;
}

.hero h1 {
  font-size: 2.2rem;
  margin: 0 0 12px;
}

.hero p {
  font-size: 0.98rem;
  line-height: 1.7;
  color: #4b5563;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.hero-meta {
  font-size: 0.85rem;
  color: #6b7280;
  margin-top: 8px;
}

.hero-media {
  position: relative;
}

.hero-card {
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.35);
  border: 1px solid #0f172a;
}

.hero-card img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-note {
  position: absolute;
  bottom: 12px;
  left: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  background: rgba(15, 23, 42, 0.85);
  color: #e5e7eb;
}

.section {
  margin-top: 32px;
}

.section-title {
  font-size: 1.4rem;
  margin-bottom: 6px;
}

.section-lead {
  font-size: 0.98rem;
  color: #4b5563;
  margin-bottom: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.card {
  background: #ffffff;
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card h3 {
  font-size: 1.02rem;
  margin: 0 0 6px;
}

.card p {
  font-size: 0.94rem;
  color: #4b5563;
  line-height: 1.6;
  margin: 0 0 10px;
}

.card ul {
  padding-left: 18px;
  margin: 0 0 8px;
  font-size: 0.94rem;
  color: #4b5563;
}

.card-footer {
  margin-top: 6px;
  font-size: 0.86rem;
}

.pill-inline {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 0.75rem;
  font-weight: 500;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.step {
  background: #ffffff;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 0.94rem;
  color: #374151;
  box-shadow: 0 2px 6px rgba(15,23,42,0.06);
}

.step-label {
  font-weight: 600;
  margin-bottom: 4px;
  color: #111827;
}

.models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
}

.model-card {
  background: #ffffff;
  border-radius: 14px;
  padding: 14px 16px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
  font-size: 0.93rem;
}

.model-name {
  font-weight: 600;
  margin-bottom: 4px;
}

.model-meta {
  font-size: 0.8rem;
  color: #6b7280;
  margin-bottom: 6px;
}

.footer {
  border-top: 1px solid #e5e7eb;
  background: #ffffff;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px;
  font-size: 0.85rem;
  color: #6b7280;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
}

.footer a {
  color: #6b7280;
}

@media (max-width: 860px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  nav.main-nav {
    margin-top: 8px;
  }
  .hero {
    grid-template-columns: 1fr;
  }
}