:root {
  --seo-purple: #6b42f5;
  --seo-deep: #172033;
  --seo-muted: #657086;
  --seo-line: #e3e8f2;
  --seo-soft: #f6f3ff;
  --seo-green: #20a875;
}

* {
  box-sizing: border-box;
}

body.seo-page {
  margin: 0;
  color: var(--seo-deep);
  background: #fff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.seo-topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--seo-line);
  backdrop-filter: blur(16px);
}

.seo-logo img {
  width: 128px;
  height: auto;
  display: block;
}

.seo-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
}

.seo-nav a,
.seo-footer a {
  color: var(--seo-deep);
  text-decoration: none;
}

.seo-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--seo-line);
  border-radius: 12px;
  color: var(--seo-deep);
  background: #fff;
  font-weight: 700;
  text-decoration: none;
}

.seo-button.primary {
  color: #fff;
  border-color: var(--seo-purple);
  background: linear-gradient(135deg, #7a4cff, #4f2be5);
  box-shadow: 0 16px 36px rgba(106, 66, 245, 0.2);
}

.seo-container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.seo-hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  padding: 72px 0 52px;
}

.seo-kicker {
  color: var(--seo-purple);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.seo-hero h1,
.seo-article h1 {
  margin: 12px 0 18px;
  font-size: clamp(42px, 6vw, 82px);
  line-height: 0.95;
  letter-spacing: 0;
}

.seo-lead {
  max-width: 680px;
  color: var(--seo-muted);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.5;
}

.seo-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.seo-visual-card,
.seo-summary,
.seo-card,
.seo-faq details,
.seo-article {
  border: 1px solid var(--seo-line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 22px 60px rgba(23, 32, 51, 0.08);
}

.seo-visual-card {
  min-height: 360px;
  padding: 28px;
  overflow: hidden;
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 112, 81, 0.18), transparent 30%),
    radial-gradient(circle at 20% 70%, rgba(107, 66, 245, 0.22), transparent 34%),
    linear-gradient(135deg, #fff, #f8f6ff);
}

.seo-visual-card img {
  width: min(360px, 100%);
  display: block;
  margin: 0 auto;
}

.seo-summary {
  margin: 18px 0 46px;
  padding: 24px;
  background: var(--seo-soft);
}

.seo-summary strong {
  display: block;
  margin-bottom: 8px;
}

.seo-section {
  padding: 48px 0;
  border-top: 1px solid #eef2f7;
}

.seo-section h2 {
  margin: 0 0 16px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.1;
}

.seo-section p {
  color: var(--seo-muted);
  line-height: 1.65;
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 26px;
}

.seo-card {
  padding: 24px;
}

.seo-card h3 {
  margin: 0 0 10px;
  font-size: 21px;
}

.seo-check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  list-style: none;
}

.seo-check-list li {
  display: flex;
  gap: 10px;
  color: var(--seo-muted);
}

.seo-check-list li::before {
  content: "✓";
  display: grid;
  place-items: center;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  color: var(--seo-green);
  background: #e8f8f1;
  font-weight: 900;
}

.seo-faq {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.seo-faq details {
  padding: 18px 20px;
}

.seo-faq summary {
  cursor: pointer;
  font-weight: 800;
}

.seo-faq p {
  margin-bottom: 0;
}

.seo-cta-band {
  margin: 54px 0;
  padding: 36px;
  border-radius: 22px;
  color: #fff;
  background: linear-gradient(135deg, #2b075c, #6b42f5);
}

.seo-cta-band p {
  color: rgba(255, 255, 255, 0.78);
}

.seo-footer {
  padding: 30px 0 46px;
  color: var(--seo-muted);
  border-top: 1px solid var(--seo-line);
}

.seo-blog-list {
  display: grid;
  gap: 16px;
  margin: 28px 0;
}

.seo-blog-list a {
  display: block;
  padding: 20px;
  color: var(--seo-deep);
  text-decoration: none;
  border: 1px solid var(--seo-line);
  border-radius: 14px;
}

.seo-article {
  margin: 42px auto;
  padding: clamp(24px, 5vw, 56px);
}

.seo-meta {
  color: var(--seo-muted);
}

@media (max-width: 820px) {
  .seo-topbar {
    align-items: flex-start;
    padding: 14px 18px;
  }

  .seo-nav {
    display: none;
  }

  .seo-logo img {
    width: 112px;
  }

  .seo-hero,
  .seo-grid {
    grid-template-columns: 1fr;
  }

  .seo-hero {
    gap: 28px;
    padding-top: 48px;
  }

  .seo-visual-card {
    min-height: auto;
  }
}