.page-news {
  display: block;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 1rem;
  font-family: var(--font-body);
  color: var(--color-text-primary);
  letter-spacing: var(--letter-spacing-body);
}

.page-news__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0;
  font-size: 0.875rem;
  color: var(--color-metal-gray);
  border-bottom: 2px solid var(--color-neutral-light);
  margin-bottom: 1.5rem;
}

.page-news__breadcrumb-link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-standard);
}

.page-news__breadcrumb-link:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.page-news__breadcrumb-sep {
  color: var(--color-metal-gray);
  font-weight: 300;
}

.page-news__breadcrumb-current {
  color: var(--color-text-primary);
  font-weight: 600;
}

.page-news__header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 4px solid var(--color-accent);
  position: relative;
}

.page-news__header::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--color-primary);
}

.page-news__title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-heading);
  margin: 0 0 0.25rem 0;
  color: var(--color-primary-variant);
  line-height: 1.2;
}

.page-news__subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-metal-gray);
  margin: 0;
  font-weight: 400;
}

.page-news__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding: 0.75rem 0;
}

.page-news__filter-btn {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
  border: 2px solid var(--color-primary);
  border-radius: 0;
  background: var(--color-surface);
  color: var(--color-primary);
  cursor: pointer;
  transition: all var(--transition-standard);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.page-news__filter-btn:hover {
  background: var(--color-neutral-light);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.page-news__filter-btn--active,
.page-news__filter-btn[aria-pressed="true"] {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  border-color: var(--color-primary);
}

.page-news__filter-btn--active:hover,
.page-news__filter-btn[aria-pressed="true"]:hover {
  background: var(--color-primary-variant);
  border-color: var(--color-primary-variant);
  color: var(--color-text-on-dark);
}

.page-news__section {
  margin-bottom: 3rem;
  position: relative;
}

.page-news__section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-heading);
  color: var(--color-primary-variant);
  margin: 0 0 1.25rem 0;
  padding-left: 0.75rem;
  border-left: 4px solid var(--color-accent);
  line-height: 1.2;
}

.page-news__card {
  background: var(--color-surface);
  border: var(--border-print);
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
  margin-bottom: 1rem;
  position: relative;
  transition: box-shadow var(--transition-standard), transform var(--transition-standard);
}

.page-news__card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  transform: translateY(-2px);
}

.page-news__card--featured {
  border-left: 6px solid var(--color-accent);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: linear-gradient(135deg, var(--color-surface) 80%, var(--color-neutral-light) 100%);
}

.page-news__card--horizontal {
  display: flex;
  flex-direction: row;
  gap: 1rem;
  align-items: flex-start;
}

.page-news__card--preview {
  border-left: 4px solid var(--color-primary);
  background: var(--color-neutral-light);
  min-height: 160px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-news__card-body {
  flex: 1;
  min-width: 0;
}

.page-news__card-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: var(--letter-spacing-heading);
  margin: 0.25rem 0 0.5rem 0;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.page-news__card-text {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-neutral-dark);
  margin: 0 0 0.75rem 0;
}

.page-news__tag {
  display: inline-block;
  font-family: var(--font-caption);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border: 1px solid;
  margin-bottom: 0.25rem;
}

.page-news__tag--feature {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: rgba(232,122,30,0.08);
}

.page-news__tag--optimization {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(43,94,59,0.06);
}

.page-news__tag--future {
  color: var(--color-metal-gray);
  border-color: var(--color-metal-gray);
  background: rgba(138,141,145,0.08);
}

.page-news__featured-img {
  width: 100%;
  max-width: 200px;
  height: auto;
  aspect-ratio: 1/1;
  object-fit: contain;
  border: var(--border-print);
  padding: 0.5rem;
  background: var(--color-neutral-light);
  align-self: center;
}

.page-news__card-icon {
  width: 60px;
  height: 60px;
  min-width: 60px;
  object-fit: contain;
  border: 1px solid var(--color-neutral-light);
  padding: 0.25rem;
  background: var(--color-surface);
  flex-shrink: 0;
}

.page-news__media-block {
  margin: 1.25rem 0;
  padding: 0;
  background: var(--color-neutral-light);
  border: var(--border-print);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-news__media-block--wide {
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
}

.page-news__media-img {
  width: 100%;
  height: auto;
  max-width: 400px;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  margin: 0 auto;
}

.page-news__arrow-img {
  width: 100%;
  height: auto;
  max-width: 300px;
  aspect-ratio: 3/1;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  padding: 0.5rem;
}

.page-news__media-caption {
  font-family: var(--font-caption);
  font-size: 0.8125rem;
  color: var(--color-metal-gray);
  text-align: center;
  padding: 0.5rem 1rem 0.75rem;
  font-style: italic;
  border-top: 1px solid rgba(138,141,145,0.2);
  margin: 0;
}

.page-news__details {
  margin-top: 0.5rem;
  border-top: 1px dashed var(--color-neutral-light);
  padding-top: 0.5rem;
}

.page-news__details-summary {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  padding: 0.25rem 0;
  transition: color var(--transition-standard);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-news__details-summary::-webkit-details-marker {
  display: none;
}

.page-news__details-summary::before {
  content: '';
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(45deg);
  transition: transform var(--transition-standard);
  margin-top: -0.125rem;
}

details[open] .page-news__details-summary::before {
  transform: rotate(-135deg);
  margin-top: 0.125rem;
}

.page-news__details-summary:hover {
  color: var(--color-accent);
}

.page-news__details-body {
  padding: 0.75rem 0 0.25rem 1rem;
  border-left: 2px solid var(--color-neutral-light);
  margin-left: 0.25rem;
}

.page-news__details-body p {
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-neutral-dark);
  margin: 0 0 0.5rem 0;
}

.page-news__list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-news__preview-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-news__internal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 2rem 0 1rem;
  margin-top: 2rem;
  border-top: 2px solid var(--color-neutral-light);
}

.page-news__internal-link {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  padding: 0.5rem 1.25rem;
  border: 2px solid var(--color-primary);
  transition: all var(--transition-standard);
  letter-spacing: 0.03em;
}

.page-news__internal-link:hover {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  border-color: var(--color-primary);
}

@media (min-width: 640px) {
  .page-news {
    padding: 1.5rem 2rem;
  }

  .page-news__card--featured {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-news__featured-img {
    max-width: 180px;
    align-self: flex-start;
  }

  .page-news__card--horizontal {
    gap: 1.25rem;
  }

  .page-news__preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .page-news__media-block--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-news {
    padding: 2rem 2.5rem;
  }

  .page-news__list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .page-news__card--horizontal {
    margin-bottom: 0;
  }

  .page-news__media-block {
    grid-column: 1 / -1;
  }

  .page-news__preview-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-news__card--featured {
    padding: 2rem;
  }

  .page-news__section-title {
    font-size: 1.5rem;
  }

  .page-news__internal-nav {
    justify-content: center;
  }
}