.content-group {
  margin-top: 2.5rem;
}

.content-group + .content-group {
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.content-group-heading {
  max-width: 820px;
  margin-bottom: .8rem;
}

.content-group-heading > p:last-child {
  margin: .3rem 0 0;
  color: var(--muted);
}

.content-label {
  margin: 0;
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.application-label { color: var(--blue-dark); }
.welding-section .article-label { color: var(--welding-accent-dark); }
.bolting-section .article-label { color: var(--bolting-accent-dark); }

.application-card {
  border-color: #9dbdcd;
  background: linear-gradient(180deg, #f5fbfd, #e7f1f5);
  box-shadow: 0 18px 45px rgba(47, 96, 123, .12);
}

.application-card .card-link {
  background: var(--blue-dark);
}

.application-card h3 {
  margin-top: .35rem;
}

.application-card-type {
  margin: -.25rem 0 .75rem;
  color: var(--blue-dark);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.article-cards {
  align-items: stretch;
  margin-top: 1.35rem;
}

.welding-section .article-cards {
  max-width: 720px;
  grid-template-columns: minmax(0, 1fr);
}

.bolting-section .article-cards {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.article-card {
  min-height: 220px;
  padding: 1.35rem;
  box-shadow: 0 18px 45px rgba(38, 55, 70, .1);
}

.article-cards .feature-card {
  grid-column: auto;
  min-height: 220px;
}

.article-card h3 {
  margin: .45rem 0 .45rem;
  font-size: clamp(1.35rem, 2.2vw, 1.65rem);
  line-height: 1.15;
}

.article-card > p {
  display: -webkit-box;
  margin: 0;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  color: #4b5961;
}

.welding-section .article-card {
  border-color: var(--welding-accent);
  background: linear-gradient(180deg, #fbfdff, var(--welding-soft));
}

.bolting-section .article-card {
  border-color: var(--bolting-accent);
  background: linear-gradient(180deg, #fbfefc, var(--bolting-soft));
}

.application-card::before,
.article-card::before {
  display: block;
  height: 5px;
  margin: -1.6rem -1.6rem 1.25rem;
  border-radius: var(--radius) var(--radius) 0 0;
  content: "";
}

.article-card::before {
  margin: -1.35rem -1.35rem 1rem;
}

.application-card::before { background: var(--blue); }
.welding-section .article-card::before { background: var(--welding-accent); }
.bolting-section .article-card::before { background: var(--bolting-accent); }

.article-card-link {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform .18s ease,
    border-color .18s ease,
    box-shadow .18s ease,
    background .18s ease;
}

.welding-section .article-card-link:hover {
  transform: translateY(-4px);
  border-color: var(--welding-accent-dark);
  background: linear-gradient(180deg, #fff, #d9ebf3);
  box-shadow: 0 24px 54px rgba(47, 96, 123, .18);
}

.bolting-section .article-card-link:hover {
  transform: translateY(-4px);
  border-color: var(--bolting-accent-dark);
  background: linear-gradient(180deg, #fff, #dceade);
  box-shadow: 0 24px 54px rgba(58, 110, 76, .18);
}

.article-card-link:hover h3 {
  text-decoration: underline;
  text-decoration-thickness: .08em;
  text-underline-offset: .16em;
}

.article-card-link:hover > p {
  color: #33434c;
}

.welding-section .article-card-link:focus-visible {
  outline: 3px solid var(--welding-accent-dark);
  outline-offset: 4px;
  transform: translateY(-2px);
  box-shadow: 0 22px 50px rgba(47, 96, 123, .18);
}

.bolting-section .article-card-link:focus-visible {
  outline: 3px solid var(--bolting-accent-dark);
  outline-offset: 4px;
  transform: translateY(-2px);
  box-shadow: 0 22px 50px rgba(58, 110, 76, .18);
}

.article-card-link:active {
  transform: translateY(0);
}

.development-note {
  max-width: 780px;
  margin-top: 2rem;
  padding: 1.15rem 1.3rem;
  border: 1px dashed #9fb0ba;
  border-radius: 10px;
  background: rgba(255,255,255,.55);
}

.development-note p {
  margin: .7rem 0 0;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .article-card-link { transition: none; }
  .article-card-link:hover,
  .article-card-link:focus-visible { transform: none; }
}

@media (max-width: 820px) {
  .content-group { margin-top: 2rem; }
  .bolting-section .article-cards { grid-template-columns: 1fr; }
  .welding-section .article-cards { max-width: none; }
}