/* =============================================================
   HCN AUTHORITY CONTENT STYLESHEET
   Engineering Guides + Case Studies 页面样式
   4-Layer SEO Architecture: Products / Applications / Guides / Case Studies
   ============================================================= */

/* ── SHARED AUTHORITY HERO ────────────────────────────────── */

.hcn-authority-hero {
  background: linear-gradient(135deg, #071832 0%, #0b2545 55%, #143662 100%);
  padding: 3rem 0 3.5rem;
  color: #fff;
}
.hcn-authority-hero--cs {
  background: linear-gradient(135deg, #071832 0%, #1a1035 55%, #0d2240 100%);
}
.hcn-authority-hero__inner {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.hcn-authority-hero__kicker {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--hcn-gold);
  margin: 0;
}
.hcn-authority-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: #fff;
  margin: 0;
  line-height: 1.1;
}
.hcn-authority-hero__lead {
  font-size: 1.05rem;
  color: rgba(255,255,255,.8);
  max-width: 60ch;
  line-height: 1.65;
  margin: 0;
}
.hcn-authority-hero__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: rgba(255,255,255,.55);
  margin-top: 0.25rem;
}

/* ── GUIDE CATEGORY FILTER BAR ────────────────────────────── */

.hcn-guide-category-bar {
  background: #fff;
  border-bottom: 1px solid var(--hcn-gray-300);
  padding: 0.85rem 0;
}
.hcn-guide-category-bar__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

/* ── GUIDE CARD GRID ──────────────────────────────────────── */

.hcn-guide-grid-section {
  padding: 3rem 0;
  background: var(--hcn-gray-50);
}
.hcn-guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.hcn-guide-grid--small {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.hcn-guide-card {
  background: #fff;
  border-radius: var(--hcn-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--hcn-gray-300);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.hcn-guide-card:hover {
  box-shadow: var(--shadow-md);
  border-top-color: var(--hcn-gold);
}
.hcn-guide-card--small {
  padding: 1.1rem;
  border-radius: var(--hcn-radius);
}
.hcn-guide-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}
.hcn-guide-card__category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--hcn-gold-dark);
  background: #fef9e7;
  padding: 0.15rem 0.5rem;
  border-radius: 99px;
}
.hcn-guide-card__read-time {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.78rem;
  color: var(--hcn-gray-500);
}
.hcn-guide-card__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 0;
  line-height: 1.3;
  flex: 1;
}
.hcn-guide-card__title a { color: inherit; text-decoration: none; }
.hcn-guide-card__title a:hover { color: var(--hcn-gold-dark); }
.hcn-guide-card__excerpt {
  font-size: 0.88rem;
  color: var(--hcn-gray-500);
  line-height: 1.6;
  margin: 0;
}
.hcn-guide-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--hcn-gray-300);
  margin-top: auto;
}
.hcn-guide-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--hcn-navy);
  text-decoration: none;
  transition: color 0.2s, gap 0.2s;
}
.hcn-guide-card__cta:hover { color: var(--hcn-gold-dark); gap: 0.5rem; }
.hcn-guide-card__product-link {
  font-size: 0.78rem;
  color: var(--hcn-gray-500);
  text-decoration: underline;
}
.hcn-guide-card__product-link:hover { color: var(--hcn-navy); }

/* ── GUIDE SINGLE: HERO ───────────────────────────────────── */

.hcn-guide-hero {
  background: linear-gradient(135deg, #071832 0%, #0b2545 55%, #143662 100%);
  padding: 2.5rem 0 3rem;
  color: #fff;
}
.hcn-guide-hero__inner { display: flex; flex-direction: column; gap: 0.75rem; }
.hcn-guide-hero__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.hcn-guide-hero__category {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--hcn-gold);
  background: rgba(212,160,23,.15);
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
}
.hcn-guide-hero__time,
.hcn-guide-hero__author {
  font-size: 0.82rem;
  color: rgba(255,255,255,.6);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.hcn-guide-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3.5vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.12;
  margin: 0;
}
.hcn-guide-hero__excerpt {
  font-size: 1rem;
  color: rgba(255,255,255,.78);
  max-width: 62ch;
  line-height: 1.65;
  margin: 0;
}

/* ── GUIDE SINGLE: BODY LAYOUT ────────────────────────────── */

.hcn-guide-body-wrap { padding: 3rem 0; }
.hcn-guide-body-inner {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 900px) {
  .hcn-guide-body-inner {
    grid-template-columns: 1fr;
  }
  .hcn-guide-toc {
    order: -1;
  }
}

/* TOC Sidebar */
.hcn-guide-toc { position: sticky; top: 90px; }
.hcn-guide-toc__inner {
  background: var(--hcn-gray-50);
  border: 1px solid var(--hcn-gray-300);
  border-radius: var(--hcn-radius-lg);
  padding: 1.25rem;
}
.hcn-guide-toc__heading {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--hcn-navy);
  margin: 0 0 0.75rem;
}
.hcn-guide-toc__list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  counter-reset: toc;
}
.hcn-guide-toc__list li {
  counter-increment: toc;
  margin-bottom: 0.5rem;
}
.hcn-guide-toc__list a {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.84rem;
  color: var(--hcn-gray-700);
  text-decoration: none;
  line-height: 1.4;
  transition: color 0.18s;
}
.hcn-guide-toc__list a::before {
  content: counter(toc) '.';
  font-weight: 700;
  color: var(--hcn-gold-dark);
  flex-shrink: 0;
  font-size: 0.78rem;
  margin-top: 1px;
}
.hcn-guide-toc__list a:hover { color: var(--hcn-navy); }
.hcn-guide-toc__cta {
  padding-top: 1rem;
  border-top: 1px solid var(--hcn-gray-300);
  font-size: 0.82rem;
  color: var(--hcn-gray-500);
}
.hcn-guide-toc__cta p { margin: 0 0 0.65rem; }
.hcn-guide-toc__products {
  padding-top: 1rem;
  border-top: 1px solid var(--hcn-gray-300);
  margin-top: 1rem;
}
.hcn-guide-toc__products h3 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--hcn-navy);
  margin: 0 0 0.5rem;
}
.hcn-guide-toc__products ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.hcn-guide-toc__products li { margin-bottom: 0.35rem; }
.hcn-guide-toc__products a {
  font-size: 0.83rem;
  color: var(--hcn-navy);
  text-decoration: underline;
}
.hcn-guide-toc__products a:hover { color: var(--hcn-gold-dark); }

/* Article Content */
.hcn-guide-article { max-width: 72ch; }
.hcn-guide-section { margin-bottom: 2.5rem; }
.hcn-guide-section h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 2.2vw, 1.65rem);
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--hcn-gray-300);
}
.hcn-guide-section h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 1.5rem 0 0.65rem;
}
.hcn-guide-section p {
  color: var(--hcn-gray-700);
  font-size: 0.97rem;
  line-height: 1.75;
  margin: 0 0 0.85rem;
}

/* Article lists */
.hcn-guide-list,
.hcn-guide-numbered {
  padding-left: 0;
  margin: 0.5rem 0 1rem;
}
.hcn-guide-list {
  list-style: none;
}
.hcn-guide-list li {
  position: relative;
  padding-left: 1.3rem;
  font-size: 0.95rem;
  color: var(--hcn-gray-700);
  line-height: 1.65;
  margin-bottom: 0.55rem;
}
.hcn-guide-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--hcn-gold);
}
.hcn-guide-numbered {
  list-style: none;
  counter-reset: guide-num;
}
.hcn-guide-numbered li {
  counter-increment: guide-num;
  position: relative;
  padding-left: 2rem;
  font-size: 0.95rem;
  color: var(--hcn-gray-700);
  line-height: 1.65;
  margin-bottom: 0.65rem;
}
.hcn-guide-numbered li::before {
  content: counter(guide-num);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.4rem;
  height: 1.4rem;
  background: var(--hcn-navy);
  color: #fff;
  border-radius: 50%;
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Article table */
.hcn-guide-table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border-radius: var(--hcn-radius-lg);
  border: 1px solid var(--hcn-gray-300);
}
.hcn-guide-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.hcn-guide-table thead th {
  background: var(--hcn-navy);
  color: #fff;
  padding: 0.7rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.hcn-guide-table tbody tr:nth-child(even) { background: var(--hcn-gray-50); }
.hcn-guide-table tbody td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--hcn-gray-300);
  color: var(--hcn-gray-700);
  vertical-align: top;
  line-height: 1.5;
}
.hcn-guide-table tbody tr:last-child td { border-bottom: none; }

/* Mid-article CTA block */
.hcn-guide-cta-block {
  background: linear-gradient(135deg, var(--hcn-navy) 0%, var(--hcn-navy-light) 100%);
  border-radius: var(--hcn-radius-lg);
  padding: 1.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin: 2.5rem 0;
  flex-wrap: wrap;
}
.hcn-guide-cta-block__body {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  flex: 1;
}
.hcn-guide-cta-block__body svg { color: var(--hcn-gold); flex-shrink: 0; margin-top: 2px; }
.hcn-guide-cta-block__body strong { display: block; color: #fff; font-size: 1rem; margin-bottom: 0.3rem; }
.hcn-guide-cta-block__body p { color: rgba(255,255,255,.75); font-size: 0.88rem; margin: 0; }
.hcn-guide-cta-block__actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex-shrink: 0;
}

/* Guide related section */
.hcn-guide-related { background: var(--hcn-gray-50); padding: 3rem 0; }
.hcn-guide-related__title {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 0 0 1.5rem;
}
.hcn-guide-related__group-label {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--hcn-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 1rem;
}

/* Back link */
.hcn-guide-back-link { padding: 1.5rem 0; border-top: 1px solid var(--hcn-gray-300); }
.hcn-guide-back-link__btn {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--hcn-navy);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.18s;
}
.hcn-guide-back-link__btn:hover { color: var(--hcn-gold-dark); }

/* ── CASE STUDY CARDS ─────────────────────────────────────── */

.hcn-cs-grid-section { padding: 3rem 0; }
.hcn-cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.hcn-cs-grid--small {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.hcn-cs-card {
  background: #fff;
  border-radius: var(--hcn-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--hcn-gray-300);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.hcn-cs-card:hover {
  box-shadow: var(--shadow-md);
  border-top-color: var(--hcn-gold);
}
.hcn-cs-card--small { padding: 1.1rem; border-radius: var(--hcn-radius); }
.hcn-cs-card__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.hcn-cs-card__category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--hcn-gold-dark);
  background: #fef9e7;
  padding: 0.15rem 0.5rem;
  border-radius: 99px;
}
.hcn-cs-card__region {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.78rem;
  color: var(--hcn-gray-500);
}
.hcn-cs-card__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 0;
  line-height: 1.3;
  flex: 1;
}
.hcn-cs-card__title a { color: inherit; text-decoration: none; }
.hcn-cs-card__title a:hover { color: var(--hcn-gold-dark); }
.hcn-cs-card__excerpt {
  font-size: 0.87rem;
  color: var(--hcn-gray-500);
  line-height: 1.6;
  margin: 0;
}
.hcn-cs-card__metrics {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.hcn-cs-card__metric {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.hcn-cs-card__metric strong {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--hcn-navy);
  line-height: 1;
}
.hcn-cs-card__metric span {
  font-size: 0.75rem;
  color: var(--hcn-gray-500);
  line-height: 1.3;
}
.hcn-cs-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--hcn-gray-300);
  margin-top: auto;
  flex-wrap: wrap;
}
.hcn-cs-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--hcn-navy);
  text-decoration: none;
  transition: color 0.2s;
}
.hcn-cs-card__cta:hover { color: var(--hcn-gold-dark); }
.hcn-cs-card__product {
  font-size: 0.78rem;
  color: var(--hcn-gray-500);
  font-style: italic;
}

/* ── CASE STUDY SINGLE ────────────────────────────────────── */

.hcn-cs-hero {
  background: linear-gradient(135deg, #071832 0%, #1a1035 55%, #0d2240 100%);
  padding: 2.5rem 0 2rem;
  color: #fff;
}
.hcn-cs-hero__inner { display: flex; flex-direction: column; gap: 0.75rem; }
.hcn-cs-hero__badges { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.hcn-cs-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.12;
  margin: 0;
}

/* Snapshot bar */
.hcn-cs-snapshot {
  background: var(--hcn-navy);
  padding: 1rem 0;
}
.hcn-cs-snapshot__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
}
.hcn-cs-snapshot__item {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.hcn-cs-snapshot__label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,.5);
}
.hcn-cs-snapshot__item strong {
  color: #fff;
  font-size: 0.95rem;
}

/* Case study body */
.hcn-cs-body-wrap { padding: 3rem 0; }
.hcn-cs-body-inner {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 900px) {
  .hcn-cs-body-inner { grid-template-columns: 1fr; }
  .hcn-cs-sidebar { order: -1; }
}

/* Sidebar */
.hcn-cs-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.hcn-cs-results {
  background: var(--hcn-navy);
  border-radius: var(--hcn-radius-lg);
  padding: 1.5rem;
  color: #fff;
}
.hcn-cs-results__title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--hcn-gold);
  margin: 0 0 1rem;
}
.hcn-cs-result-item {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: 0.85rem;
}
.hcn-cs-result-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.hcn-cs-result-item__metric {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--hcn-gold);
  line-height: 1;
}
.hcn-cs-result-item__label {
  font-size: 0.82rem;
  color: rgba(255,255,255,.7);
  line-height: 1.4;
}
.hcn-cs-sidebar-section {
  background: var(--hcn-gray-50);
  border: 1px solid var(--hcn-gray-300);
  border-radius: var(--hcn-radius-lg);
  padding: 1.25rem;
}
.hcn-cs-sidebar-section__title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--hcn-navy);
  margin: 0 0 0.65rem;
}
.hcn-cs-sidebar-section__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.hcn-cs-sidebar-section__list li { margin-bottom: 0.4rem; }
.hcn-cs-sidebar-section__list a {
  font-size: 0.85rem;
  color: var(--hcn-navy);
  text-decoration: underline;
}
.hcn-cs-sidebar-section__list a:hover { color: var(--hcn-gold-dark); }
.hcn-cs-sidebar-cta {
  background: var(--hcn-gray-50);
  border: 1px solid var(--hcn-gray-300);
  border-radius: var(--hcn-radius-lg);
  padding: 1.25rem;
  text-align: center;
}
.hcn-cs-sidebar-cta p {
  font-size: 0.85rem;
  color: var(--hcn-gray-500);
  margin: 0 0 0.75rem;
}

/* Case study article */
.hcn-cs-article { max-width: 68ch; }
.hcn-cs-lead {
  background: var(--hcn-gray-50);
  border-left: 4px solid var(--hcn-gold);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  border-radius: 0 var(--hcn-radius) var(--hcn-radius) 0;
}
.hcn-cs-lead p {
  margin: 0;
  font-size: 1rem;
  color: var(--hcn-gray-700);
  line-height: 1.7;
}
.hcn-cs-section { margin-bottom: 2.5rem; }
.hcn-cs-section h2 {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 0 0 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--hcn-gray-300);
}
.hcn-cs-section__tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  flex-shrink: 0;
}
.hcn-cs-section__tag--challenge { background: #fee2e2; color: #7f1d1d; }
.hcn-cs-section__tag--solution  { background: #d1fae5; color: #064e3b; }
.hcn-cs-section__tag--results   { background: #dbeafe; color: #1e3a8a; }
.hcn-cs-section p {
  font-size: 0.97rem;
  color: var(--hcn-gray-700);
  line-height: 1.75;
  margin: 0 0 0.85rem;
}
.hcn-cs-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}
.hcn-cs-results-grid__item {
  background: var(--hcn-navy);
  border-radius: var(--hcn-radius-lg);
  padding: 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.hcn-cs-results-grid__item strong {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--hcn-gold);
  line-height: 1;
}
.hcn-cs-results-grid__item span {
  font-size: 0.78rem;
  color: rgba(255,255,255,.7);
  line-height: 1.35;
}
.hcn-cs-testimonial {
  background: var(--hcn-gray-50);
  border-left: 4px solid var(--hcn-gold);
  padding: 1.5rem 1.75rem;
  margin: 2rem 0;
  border-radius: 0 var(--hcn-radius-lg) var(--hcn-radius-lg) 0;
}
.hcn-cs-testimonial p {
  font-size: 1.05rem;
  color: var(--hcn-dark);
  font-style: italic;
  line-height: 1.7;
  margin: 0 0 0.75rem;
}
.hcn-cs-testimonial cite {
  font-size: 0.82rem;
  color: var(--hcn-gray-500);
  font-style: normal;
  font-weight: 600;
}
.hcn-cs-related-guides { margin-top: 2.5rem; }
.hcn-cs-related-guides h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 0 0 1rem;
}

/* CS CTA band */
.hcn-cs-cta-band {
  background: linear-gradient(135deg, var(--hcn-navy) 0%, #0d2a50 100%);
  padding: 3rem 0;
}
.hcn-cs-cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.hcn-cs-cta-band__inner h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  margin: 0 0 0.35rem;
}
.hcn-cs-cta-band__inner p {
  color: rgba(255,255,255,.75);
  font-size: 0.95rem;
  margin: 0;
}
.hcn-cs-cta-band__actions {
  display: flex;
  gap: 0.75rem;
  flex-shrink: 0;
  flex-wrap: wrap;
}

/* More case studies section */
.hcn-cs-more { padding: 2.5rem 0; border-top: 1px solid var(--hcn-gray-300); }
.hcn-cs-more__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 0 0 1.25rem;
}

/* ── CROSS-LINK CARDS ─────────────────────────────────────── */

.hcn-authority-cross-links {
  padding: 3rem 0;
  background: var(--hcn-gray-50);
  border-top: 1px solid var(--hcn-gray-300);
}
.hcn-authority-cross-links__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--hcn-navy);
  margin: 0 0 1.5rem;
}
.hcn-authority-cross-links__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}
.hcn-cross-link-card {
  background: #fff;
  border: 1.5px solid var(--hcn-gray-300);
  border-radius: var(--hcn-radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.hcn-cross-link-card:hover {
  border-color: var(--hcn-navy);
  box-shadow: var(--shadow-sm);
}
.hcn-cross-link-card--cta {
  background: var(--hcn-navy);
  border-color: var(--hcn-navy);
  color: #fff;
}
.hcn-cross-link-card svg { color: var(--hcn-gold); }
.hcn-cross-link-card--cta svg { color: var(--hcn-gold); }
.hcn-cross-link-card strong {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--hcn-navy);
}
.hcn-cross-link-card--cta strong { color: #fff; }
.hcn-cross-link-card span {
  font-size: 0.83rem;
  color: var(--hcn-gray-500);
  line-height: 1.5;
}
.hcn-cross-link-card--cta span { color: rgba(255,255,255,.7); }

/* ── RESPONSIVE ────────────────────────────────────────────── */

@media (max-width: 768px) {
  .hcn-guide-cta-block { flex-direction: column; }
  .hcn-cs-cta-band__inner { flex-direction: column; align-items: flex-start; }
  .hcn-guide-grid { grid-template-columns: 1fr; }
  .hcn-cs-grid { grid-template-columns: 1fr; }
  .hcn-authority-cross-links__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .hcn-authority-cross-links__grid { grid-template-columns: 1fr; }
}