.oai-seo-shell {
  max-width: 980px;
  margin: 32px auto;
  padding: 0 20px;
}

.oai-seo-article {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 20px;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.06);
  overflow: hidden;
}

.oai-seo-intro-card {
  margin: 24px;
  padding: 24px;
  border-radius: 18px;
  background: linear-gradient(135deg, #f8fbff 0%, #eef6ff 100%);
  border: 1px solid #dbeafe;
}

.oai-seo-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #2563eb;
  margin-bottom: 8px;
}

.oai-seo-intro-card h2 {
  margin: 0 0 8px;
  font-size: 28px;
  line-height: 1.2;
}

.oai-seo-intro-card p {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: #334155;
}

.oai-seo-summary {
  margin: 0 24px 24px;
  padding: 20px;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  background: #f8fafc;
}

.oai-seo-summary-title {
  font-size: 14px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
}

.oai-seo-summary ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px 16px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.oai-seo-summary li { margin: 0; }

.oai-seo-summary a {
  display: block;
  padding: 10px 12px;
  border-radius: 12px;
  text-decoration: none;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  color: #1e293b;
  font-weight: 600;
}

.oai-seo-summary a:hover {
  background: #eff6ff;
  border-color: #bfdbfe;
}

.oai-seo-content {
  padding: 8px 24px 32px;
}

.oai-seo-content h1,
.oai-seo-content h2,
.oai-seo-content h3 {
  color: #0f172a;
  line-height: 1.25;
}

.oai-seo-content h2 {
  margin-top: 40px;
  margin-bottom: 14px;
  padding-left: 14px;
  border-left: 4px solid #2563eb;
  font-size: 30px;
}

.oai-seo-content h3 {
  margin-top: 28px;
  margin-bottom: 10px;
  font-size: 22px;
}

.oai-seo-content p,
.oai-seo-content li {
  font-size: 17px;
  line-height: 1.8;
  color: #334155;
}

.oai-seo-content ul,
.oai-seo-content ol {
  padding-left: 24px;
}

.oai-seo-content a {
  color: #1d4ed8;
  text-underline-offset: 2px;
}

.oai-seo-context {
  margin: 22px 0 28px;
  padding: 18px 20px;
  border-radius: 16px;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  color: #1e293b;
  font-size: 16px;
  line-height: 1.7;
}

.oai-seo-faq-note {
  margin: 8px 0 18px;
  padding: 14px 16px;
  border-left: 4px solid #0ea5e9;
  background: #f0f9ff;
  border-radius: 12px;
  color: #0f172a;
}

.oai-seo-table-wrap {
  overflow-x: auto;
  margin: 22px 0;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
}

.oai-seo-content table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  min-width: 640px;
}

.oai-seo-content th,
.oai-seo-content td {
  padding: 14px 16px;
  border-bottom: 1px solid #e2e8f0;
  text-align: left;
  vertical-align: top;
}

.oai-seo-content th {
  background: #f8fafc;
  color: #0f172a;
}

.oai-seo-content blockquote {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 4px solid #2563eb;
  background: #eff6ff;
  border-radius: 14px;
}

@media (max-width: 767px) {
  .oai-seo-shell {
    padding: 0 12px;
    margin: 20px auto;
  }

  .oai-seo-intro-card,
  .oai-seo-summary,
  .oai-seo-content {
    margin-left: 16px;
    margin-right: 16px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .oai-seo-content {
    margin: 0;
    padding-top: 0;
    padding-bottom: 24px;
  }

  .oai-seo-intro-card h2,
  .oai-seo-content h2 {
    font-size: 24px;
  }

  .oai-seo-content p,
  .oai-seo-content li {
    font-size: 16px;
  }

  .oai-seo-summary ul {
    grid-template-columns: 1fr;
  }
}


.oai-seo-sim-cta {
  margin: 30px 0;
  padding: 22px 28px 18px;
  border-radius: 18px;
  background: #f3f4f6;
  border: 1px solid #cfe0ff;
  text-align: center;
}

.oai-seo-sim-cta-title {
  margin: 0 0 12px;
  font-size: 20px;
  line-height: 1.35;
  font-weight: 700;
  color: #1e3a8a;
}

.oai-seo-content .oai-seo-sim-cta p {
  margin: 0;
  color: #334155;
}

.oai-seo-content .oai-seo-sim-cta-action {
  margin-top: 18px;
}

.oai-seo-sim-cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 134px;
  min-height: 48px;
  padding: 12px 24px;
  border-radius: 14px;
  background: #2563eb;
  color: #ffffff !important;
  text-decoration: none;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.22);
}

.oai-seo-sim-cta-button:hover {
  background: #1d4ed8;
}