.page-articles .hero {
  padding: var(--space-6) 0 var(--space-4);
}

.page-articles .hero .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-3);
}

.page-articles .hero .crumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-articles .hero .crumbs a:hover,
.page-articles .hero .crumbs a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-articles .hero__frame {
  position: relative;
  border: var(--border-thick) solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-3) var(--space-4);
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--color-primary) 9%, transparent) 0%,
      transparent 46%),
    var(--color-surface);
  overflow: hidden;
}

.page-articles .hero__frame::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 42%, transparent);
  border-radius: var(--radius-sm);
  pointer-events: none;
}

.page-articles .hero__head {
  position: relative;
  z-index: 1;
  max-width: var(--measure);
}

.page-articles .hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.page-articles .hero__sub {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
  max-width: 46ch;
}

.page-articles .hero__band {
  position: relative;
  z-index: 1;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thick) solid var(--color-line);
  display: grid;
  gap: var(--space-4);
}

.page-articles .hero__readout {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-articles .hero__num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-accent);
  text-shadow: var(--shadow-2);
}

.page-articles .hero__num-cap {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-articles .hero__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.page-articles .hero__tags .tag {
  border-color: color-mix(in srgb, var(--color-primary) 55%, transparent);
  color: var(--color-ink);
}

.page-articles .band__figure {
  margin: 0 0 var(--space-6);
}

.page-articles .figure {
  margin: 0;
}

.page-articles .figure__frame {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  overflow: hidden;
}

.page-articles .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-articles .figure__cap {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
  max-width: var(--measure);
}

.page-articles .filter-bar {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--space-1);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-4);
  border-bottom: var(--border-thick) solid var(--color-line);
  -webkit-overflow-scrolling: touch;
}

.page-articles .filter-bar .chip {
  flex: 0 0 auto;
  cursor: pointer;
  white-space: nowrap;
}

.page-articles .filter-bar__count {
  flex: 0 0 auto;
  margin-left: auto;
  padding-left: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-articles .flow {
  display: grid;
  gap: 0;
}

.page-articles .flow-item {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: border-color 180ms ease;
}

.page-articles .flow-item:hover,
.page-articles .flow-item:focus-within {
  border-bottom-color: color-mix(in srgb, var(--color-primary) 60%, transparent);
}

.page-articles .flow-item__rail {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.page-articles .flow-item__no {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: color-mix(in srgb, var(--color-primary) 78%, var(--color-ink));
}

.page-articles .flow-item__round {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-articles .flow-item__body {
  display: grid;
  gap: var(--space-2);
  justify-items: start;
}

.page-articles .flow-item__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0;
  max-width: 32ch;
}

.page-articles .flow-item__point {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
  max-width: var(--measure);
}

.page-articles .flow-item__scope {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
  margin: 0;
  max-width: var(--measure);
}

.page-articles .flow-item__scope .mono {
  color: var(--color-ink);
  margin-right: var(--space-1);
}

.page-articles .flow-item__more {
  width: 100%;
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-2);
}

.page-articles .flow-item__more summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-accent);
  padding: var(--space-1) 0;
  transition: color 180ms ease;
}

.page-articles .flow-item__more summary::-webkit-details-marker {
  display: none;
}

.page-articles .flow-item__more summary::before {
  content: "＋ ";
}

.page-articles .flow-item__more[open] summary::before {
  content: "－ ";
}

.page-articles .flow-item__more summary:hover,
.page-articles .flow-item__more summary:focus-visible {
  color: var(--color-focus);
}

.page-articles .flow-item__more p {
  margin: var(--space-1) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-articles .flow-item__more a,
.page-articles .compare-tail a,
.page-articles .feedback-tail a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-accent) 55%, transparent);
  transition: border-color 180ms ease, color 180ms ease;
}

.page-articles .flow-item__more a:hover,
.page-articles .compare-tail a:hover,
.page-articles .feedback-tail a:hover,
.page-articles .flow-item__more a:focus-visible,
.page-articles .compare-tail a:focus-visible,
.page-articles .feedback-tail a:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

.page-articles .flow-figure {
  margin: var(--space-6) 0 0;
}

.page-articles .compare-grid {
  display: grid;
  gap: var(--space-6);
}

.page-articles .compare-visual {
  display: grid;
  gap: var(--space-4);
}

.page-articles .tilt-cards {
  display: grid;
  gap: var(--space-3);
  padding: 0 var(--space-1);
}

.page-articles .tilt-card {
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-primary-soft) 70%, var(--color-surface));
  transition: transform 200ms ease, border-color 200ms ease;
}

.page-articles .tilt-card--a {
  transform: rotate(-1.6deg);
}

.page-articles .tilt-card--b {
  transform: rotate(1.4deg);
}

.page-articles .tilt-card--a:hover,
.page-articles .tilt-card--b:hover,
.page-articles .tilt-card--a:focus-within,
.page-articles .tilt-card--b:focus-within {
  transform: rotate(0deg) translateY(-2px);
}

.page-articles .tilt-card__k {
  display: block;
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.page-articles .tilt-card__v {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-articles .compare-table-wrap {
  overflow-x: auto;
  border-top: var(--border-thick) solid var(--color-primary);
  border-bottom: var(--border-thick) solid var(--color-line);
  -webkit-overflow-scrolling: touch;
}

.page-articles .compare-table-wrap .table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-articles .compare-caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  padding: var(--space-2) 0;
}

.page-articles .compare-table-wrap th,
.page-articles .compare-table-wrap td {
  text-align: left;
  padding: var(--space-2) var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  line-height: 1.5;
  color: var(--color-ink-soft);
  vertical-align: top;
}

.page-articles .compare-table-wrap thead th {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  color: var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-line);
}

.page-articles .compare-table-wrap tbody th {
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  white-space: nowrap;
}

.page-articles .compare-table-wrap tbody tr {
  transition: background-color 180ms ease;
}

.page-articles .compare-table-wrap tbody tr:hover {
  background-color: var(--color-highlight);
}

.page-articles .compare-tail {
  margin: var(--space-4) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-articles .feedback-grid {
  display: grid;
  gap: var(--space-4);
}

.page-articles .feedback-figure {
  margin: 0;
}

.page-articles .feedback-quotes {
  display: grid;
  gap: 0;
}

.page-articles .quote {
  margin: 0;
  padding: var(--space-3) 0 var(--space-3) var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-articles .quote:last-child {
  border-bottom: none;
}

.page-articles .quote blockquote {
  margin: 0;
}

.page-articles .quote blockquote p {
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  max-width: 34ch;
}

.page-articles .quote__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-articles .quote__state {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  color: var(--color-accent-ink);
  background: var(--color-accent);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
}

.page-articles .feedback-tail {
  margin: var(--space-6) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-articles .next {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-articles .next .section-head__no {
  color: var(--color-contrast-accent);
}

.page-articles .next .section-head__title {
  color: var(--color-contrast-ink);
}

.page-articles .next .section-head__note {
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-articles .next .rule-thin,
.page-articles .next .rule-thick,
.page-articles .next .rule-double {
  border-color: var(--color-contrast-line);
}

.page-articles .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--border-thick) solid var(--color-contrast-ink);
}

.page-articles .next-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-articles .next-item__no {
  font-size: var(--text-lg);
  line-height: 1;
  font-weight: 700;
  color: var(--color-contrast-accent);
}

.page-articles .next-item__body {
  display: grid;
  gap: var(--space-1);
  justify-items: start;
}

.page-articles .next-item__body h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-articles .next-item__body p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.8;
  max-width: 48ch;
}

.page-articles .next-item__body .btn--ghost {
  margin-top: var(--space-1);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-ink);
}

.page-articles .next-item__body .btn--ghost:hover,
.page-articles .next-item__body .btn--ghost:focus-visible {
  color: var(--color-contrast-surface);
  background: var(--color-contrast-ink);
}

.page-articles .next-cta {
  margin-top: var(--space-6);
  padding: var(--space-4);
  border: var(--border-thick) solid var(--color-contrast-ink);
  border-radius: var(--radius-lg);
  background: transparent;
  display: grid;
  gap: var(--space-3);
  justify-items: start;
}

.page-articles .next-cta p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  max-width: var(--measure);
}

@media (min-width: 640px) {
  .page-articles .hero__frame {
    padding: var(--space-8) var(--space-6) var(--space-6);
  }

  .page-articles .hero__band {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: var(--space-6);
  }

  .page-articles .hero__tags {
    justify-content: flex-end;
  }

  .page-articles .tilt-cards {
    grid-template-columns: 1fr 1fr;
  }

  .page-articles .next-item {
    grid-template-columns: 72px 1fr;
  }
}

@media (min-width: 900px) {
  .page-articles .flow-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-6) 0;
  }

  .page-articles .flow-item__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
    padding-top: 2px;
  }

  .page-articles .flow-item__no {
    font-size: var(--text-2xl);
  }

  .page-articles .compare-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 8fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-articles .compare-visual {
    gap: var(--space-6);
    position: sticky;
    top: var(--space-3);
  }

  .page-articles .tilt-cards {
    grid-template-columns: 1fr;
  }

  .page-articles .feedback-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-articles .next-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: var(--border-thick) solid var(--color-contrast-ink);
  }

  .page-articles .next-item {
    padding: var(--space-6) var(--space-4) var(--space-6) 0;
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
  }

  .page-articles .next-item:nth-child(odd) {
    border-right: var(--border-thin) solid var(--color-contrast-line);
  }

  .page-articles .next-item:nth-child(even) {
    padding-left: var(--space-4);
  }
}

@media (min-width: 1100px) {
  .page-articles .flow-item {
    grid-template-columns: 200px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-articles .tilt-card,
  .page-articles .flow-item,
  .page-articles .compare-table-wrap tbody tr {
    transition: none;
  }

  .page-articles .tilt-card--a,
  .page-articles .tilt-card--b {
    transform: none;
  }
}