:root {
  --seo-shell: 1120px;
  --seo-bg: #f6f9fd;
  --seo-surface: rgba(255, 255, 255, 0.96);
  --seo-border: rgba(15, 23, 42, 0.08);
  --seo-ink: #0f172a;
  --seo-ink-soft: #334155;
  --seo-muted: #64748b;
  --seo-accent: #0f5bd7;
  --seo-accent-soft: #eaf3ff;
}

* {
  box-sizing: border-box;
}

.seo-page {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(15, 91, 215, 0.08), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, var(--seo-bg) 100%);
  color: var(--seo-ink);
}

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

.seo-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--seo-border);
}

.seo-topbar-inner {
  width: min(100% - 32px, var(--seo-shell));
  margin: 0 auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.seo-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.seo-brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f5bd7, #2677e8);
  color: #fff;
}

.seo-brand-mark svg {
  width: 18px;
  height: 18px;
}

.seo-brand-text {
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.seo-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.seo-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border-radius: 999px;
  color: var(--seo-ink-soft);
  text-decoration: none;
  font-size: 13px;
  font-weight: 800;
}

.seo-nav a:hover,
.seo-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.92);
  color: var(--seo-ink);
}

.seo-nav-cta {
  border: 1px solid rgba(15, 23, 42, 0.1);
  background: #fff;
}

.seo-main {
  padding: 40px 0 72px;
}

.seo-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: start;
}

.seo-eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--seo-accent-soft);
  color: var(--seo-accent);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.seo-hero h1,
.seo-section h2,
.seo-final h2 {
  margin: 16px 0 0;
  color: #0b1b33;
  line-height: 1.04;
  letter-spacing: -0.05em;
}

.seo-hero h1 {
  font-size: clamp(2.7rem, 5vw, 4.5rem);
}

.seo-section h2,
.seo-final h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

.seo-lead,
.seo-section p,
.seo-side-card p,
.seo-feature-card p,
.seo-detail-card p,
.seo-final p {
  color: var(--seo-muted);
  line-height: 1.72;
  font-size: 15px;
}

.seo-lead {
  margin: 18px 0 0;
  font-size: 18px;
}

.seo-action-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.seo-button {
  min-height: 50px;
  padding: 0 18px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 14px;
  font-weight: 900;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.seo-button:hover,
.seo-button:focus-visible {
  transform: translateY(-1px);
}

.seo-button-primary {
  background: linear-gradient(135deg, #0f5bd7, #2677e8);
  color: #fff;
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.22);
}

.seo-button-secondary {
  border: 1px solid rgba(15, 23, 42, 0.1);
  background: #fff;
  color: var(--seo-ink);
}

.seo-side-card,
.seo-section,
.seo-final {
  margin-top: 24px;
  padding: 28px;
  border: 1px solid var(--seo-border);
  border-radius: 24px;
  background: var(--seo-surface);
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.06);
}

.seo-side-card {
  margin-top: 0;
}

.seo-side-card h2,
.seo-side-card h3 {
  margin: 14px 0 0;
  color: var(--seo-ink);
  font-size: 28px;
  letter-spacing: -0.04em;
}

.seo-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
}

.seo-chip {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid rgba(15, 23, 42, 0.08);
  color: var(--seo-ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.seo-section-grid,
.seo-feature-grid,
.seo-detail-grid {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

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

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

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

.seo-feature-card,
.seo-detail-card {
  padding: 20px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  background: #fff;
}

.seo-feature-card h3,
.seo-detail-card h3 {
  margin: 0 0 10px;
  color: var(--seo-ink);
  font-size: 20px;
  letter-spacing: -0.03em;
}

.seo-bullet-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.seo-bullet-list li {
  position: relative;
  padding-left: 24px;
  color: var(--seo-ink-soft);
  font-size: 15px;
  line-height: 1.68;
}

.seo-bullet-list li + li {
  margin-top: 10px;
}

.seo-bullet-list li::before {
  content: "•";
  position: absolute;
  left: 8px;
  top: 0;
  color: var(--seo-accent);
  font-weight: 900;
}

.seo-footer {
  padding: 24px 0 40px;
  text-align: center;
  color: var(--seo-muted);
}

.seo-footer a {
  margin: 0 10px;
  color: var(--seo-ink-soft);
  text-decoration: none;
  font-weight: 800;
}

@media (max-width: 980px) {
  .seo-hero,
  .seo-section-grid,
  .seo-feature-grid,
  .seo-detail-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .seo-topbar {
    position: static;
  }

  .seo-topbar-inner {
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .seo-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .seo-main {
    padding-top: 24px;
  }

  .seo-shell {
    width: calc(100vw - 24px);
  }
}