.page-articles {
  --art-edge: color-mix(in srgb, var(--color-primary) 42%, transparent);
  --art-edge-soft: color-mix(in srgb, var(--color-primary) 20%, transparent);
  --art-accent-edge: color-mix(in srgb, var(--color-accent) 50%, transparent);
  --art-wash: color-mix(in srgb, var(--color-primary) 14%, transparent);
  display: block;
  overflow-x: clip;
}

.page-articles .crumb {
  padding-block: var(--space-2);
}

/* ---------- 首屏 ---------- */
.page-articles .cat-hero {
  position: relative;
  width: 100vw;
  margin-inline: calc(50% - 50vw);
  background: var(--color-surface);
}

.page-articles .cat-hero__frame {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-8) var(--space-6);
  border-block: var(--border-thin) solid var(--art-edge);
}

.page-articles .cat-hero__frame > img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-articles .cat-hero__tint {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(115deg, color-mix(in srgb, var(--color-primary) 58%, transparent) 0%, transparent 58%),
    linear-gradient(0deg, color-mix(in srgb, var(--color-surface) 62%, transparent) 0%, transparent 72%);
}

.page-articles .media-frame__scrim {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: var(--overlay-scrim);
}

.page-articles .cat-hero__body {
  position: relative;
  z-index: 3;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-2);
  color: var(--color-contrast-ink);
}

.page-articles .cat-hero__eyebrow {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.page-articles .cat-hero__title {
  margin: 0 0 var(--space-3);
  max-width: 18ch;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: -0.022em;
  color: var(--color-contrast-ink);
  text-shadow: 0 0 34px color-mix(in srgb, var(--color-primary) 38%, transparent);
}

.page-articles .cat-hero__lead {
  margin: 0 0 var(--space-6);
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-articles .cat-hero__figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  max-width: 46rem;
  padding-block-start: var(--space-3);
  border-block-start: var(--border-thin) solid var(--color-contrast-line);
}

.page-articles .fig {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 var(--space-1);
  position: relative;
  padding-block-start: var(--space-2);
}

.page-articles .fig::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  width: 28%;
  height: 2px;
  background: var(--color-contrast-accent);
}

.page-articles .fig__num {
  font-size: min(var(--text-figure), 9vw);
  line-height: 1;
  font-weight: 700;
  color: var(--color-contrast-ink);
}

.page-articles .fig__unit {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
}

.page-articles .fig__label {
  flex-basis: 100%;
  margin-block-start: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

/* ---------- 分类刻度带 ---------- */
.page-articles .cat-band__inner {
  position: relative;
  overflow: hidden;
  padding: var(--space-4) var(--space-2) var(--space-4);
  border: var(--border-thin) solid var(--art-edge);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--color-surface-alt) 0%, var(--color-surface) 100%);
  box-shadow: 0 0 32px color-mix(in srgb, var(--color-primary) 22%, transparent);
}

.page-articles .cat-band__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

.page-articles .cat-band__inner > *:not(.cat-band__bg) {
  position: relative;
  z-index: 1;
}

.page-articles .cat-band__title {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-shadow: 0 0 22px color-mix(in srgb, var(--color-primary) 45%, transparent);
}

.page-articles .cat-band__note {
  margin: 0 0 var(--space-3);
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-articles .cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-articles .cats__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-2) var(--space-2) 0;
  text-decoration: none;
  color: var(--color-ink);
  transition: color 0.2s ease;
}

.page-articles .cats__link::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  width: 22%;
  height: 2px;
  background: var(--color-line);
  transition: width 0.24s ease, background-color 0.24s ease;
}

.page-articles .cats__link:hover::before,
.page-articles .cats__link:focus-visible::before {
  width: 100%;
  background: var(--color-accent);
}

.page-articles .cats__link:hover,
.page-articles .cats__link:focus-visible {
  color: var(--color-primary-ink);
  color: color-mix(in srgb, var(--color-accent) 70%, var(--color-ink));
}

.page-articles .cats__no {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-articles .cats__name {
  flex: 1 1 auto;
  font-size: var(--text-lg);
  font-weight: 600;
}

.page-articles .cats__count {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-ink);
}

.page-articles .cats__unit {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 目录 ---------- */
.page-articles .cat-dir__head {
  max-width: 62ch;
  margin-block-end: var(--space-4);
}

.page-articles .cat-dir__head h2 {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-shadow: 0 0 26px color-mix(in srgb, var(--color-primary) 32%, transparent);
}

.page-articles .cat-dir__head p:last-child {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

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

.page-articles .cat-dir__band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 220;
  object-fit: cover;
  border-radius: var(--radius-md);
  opacity: 0.75;
}

.page-articles .cat-dir__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.page-articles .group {
  scroll-margin-block-start: var(--space-8);
}

.page-articles .group__head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-block-end: var(--space-2);
}

.page-articles .group__no {
  font-size: var(--text-sm);
  color: var(--color-accent);
}

.page-articles .group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-articles .rule-ticks {
  flex: 1 1 4rem;
  height: 6px;
  min-width: 3rem;
  background: repeating-linear-gradient(
    90deg,
    var(--color-line) 0 1px,
    transparent 1px 0.75rem
  );
}

.page-articles .group__count {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-articles .entry {
  position: relative;
  padding-inline-start: var(--space-2);
  border-radius: var(--radius-sm);
}

.page-articles .entry::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-primary) 100%);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.28s ease;
}

.page-articles .entry:hover::before,
.page-articles .entry:focus-within::before,
.page-articles .entry[open]::before {
  transform: scaleY(1);
}

.page-articles .entry__head {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  grid-template-areas:
    "no title"
    "no desc"
    ".  meta";
  gap: var(--space-1) var(--space-2);
  padding: var(--space-3) var(--space-2) var(--space-3) 0;
  cursor: pointer;
  list-style: none;
  align-items: start;
}

.page-articles .entry__head::-webkit-details-marker {
  display: none;
}

.page-articles .entry__no {
  grid-area: no;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  transition: color 0.2s ease;
}

.page-articles .entry:hover .entry__no,
.page-articles .entry[open] .entry__no {
  color: var(--color-accent);
}

.page-articles .entry__title {
  grid-area: title;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.008em;
}

.page-articles .entry__desc {
  grid-area: desc;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-articles .entry__tag {
  grid-area: meta;
  justify-self: start;
}

.page-articles .entry__state {
  grid-area: meta;
  justify-self: start;
  margin-inline-start: 6.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-articles .entry__toggle {
  display: none;
}

.page-articles .entry__toggle::before {
  content: "+";
}

.page-articles .entry[open] .entry__toggle::before {
  content: "−";
}

.page-articles .entry__body {
  padding: 0 var(--space-2) var(--space-3) 0;
}

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

.page-articles .entry__body a {
  color: var(--color-accent);
  text-decoration: none;
  border-block-end: var(--border-thin) solid var(--art-accent-edge);
}

.page-articles .entry__body a:hover,
.page-articles .entry__body a:focus-visible {
  color: var(--color-focus);
}

/* ---------- 高频阅读入口 ---------- */
.page-articles .cat-popular__panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--art-edge);
  box-shadow: 0 0 40px color-mix(in srgb, var(--color-primary) 24%, transparent);
}

.page-articles .cat-popular__panel > img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-articles .cat-popular__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--overlay-scrim);
}

.page-articles .cat-popular__body {
  position: relative;
  z-index: 2;
  padding: var(--space-6) var(--space-3);
  color: var(--color-contrast-ink);
}

.page-articles .cat-popular__body h2 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-articles .cat-popular__body .lead-line {
  margin: 0 0 var(--space-4);
  max-width: 54ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

/* ---------- V3 分类入口 ---------- */
.page-articles .cat-v3__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-articles .cat-v3__lead h2 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-articles .cat-v3__lead p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .v3-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-block-start: var(--border-thin) solid var(--art-edge);
}

.page-articles .v3-list__item {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-block-end: var(--border-thin) solid var(--color-line);
}

.page-articles .v3-list__no {
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-articles .v3-list__name {
  flex: 1 1 auto;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
}

.page-articles .v3-list__sub {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 更新节奏 ---------- */
.page-articles .cat-rhythm__head {
  max-width: 62ch;
  margin-block-end: var(--space-4);
}

.page-articles .cat-rhythm__head h2 {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-shadow: 0 0 26px color-mix(in srgb, var(--color-primary) 32%, transparent);
}

.page-articles .cat-rhythm__head p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-articles .rhythm {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin: 0 0 var(--space-6);
  padding: 0;
  list-style: none;
}

.page-articles .rhythm__item {
  padding-block-start: var(--space-3);
  border-block-start: 2px solid var(--art-wash);
}

.page-articles .rhythm__no {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-block-end: var(--space-1);
}

.page-articles .rhythm__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-ink);
}

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

.page-articles .rhythm__item a {
  color: var(--color-accent);
  text-decoration: none;
  border-block-end: var(--border-thin) solid var(--art-accent-edge);
}

.page-articles .rhythm__item a:hover,
.page-articles .rhythm__item a:focus-visible {
  color: var(--color-focus);
}

.page-articles .cat-rhythm__next {
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-3);
  border-inline-start: 3px solid var(--color-accent);
  background: linear-gradient(90deg, color-mix(in srgb, var(--color-primary) 16%, transparent) 0%, transparent 78%);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-articles .cat-rhythm__next-title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-ink);
}

.page-articles .next-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-articles .next-list__item {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: var(--space-1) var(--space-2);
  align-items: baseline;
}

.page-articles .next-list__no {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-articles .next-list__item a {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  border-block-end: var(--border-thin) solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-articles .next-list__item a:hover,
.page-articles .next-list__item a:focus-visible {
  color: var(--color-focus);
  border-block-end-color: var(--art-accent-edge);
}

.page-articles .next-list__note {
  grid-column: 2;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-articles .cats {
    grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
    gap: 0 var(--space-2);
  }

  .page-articles .v3-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-4);
  }

  .page-articles .rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-articles .next-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2) var(--space-4);
  }
}

@media (min-width: 960px) {
  .page-articles .cat-hero__frame {
    padding-block: var(--space-8) var(--space-8);
  }

  .page-articles .cat-band__inner {
    padding: var(--space-4) var(--space-4);
  }

  .page-articles .cat-dir__band {
    margin-block-end: var(--space-8);
  }

  .page-articles .entry__head {
    grid-template-columns: 3.6rem minmax(0, 1fr) auto auto 1.4rem;
    grid-template-areas:
      "no title tag state toggle"
      "no desc  tag state toggle";
    align-items: center;
    gap: 0 var(--space-2);
  }

  .page-articles .entry__tag,
  .page-articles .entry__state {
    align-self: center;
  }

  .page-articles .entry__state {
    margin-inline-start: 0;
    text-align: end;
  }

  .page-articles .entry__toggle {
    display: block;
    justify-self: end;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-ink-muted);
  }

  .page-articles .entry__body {
    padding-inline-start: calc(3.6rem + var(--space-2));
  }

  .page-articles .cat-popular__body {
    padding: var(--space-8) var(--space-6);
  }

  .page-articles .cat-popular__body h2 {
    font-size: var(--text-4xl);
  }

  .page-articles .cat-v3__grid {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-6);
    align-items: start;
  }

  .page-articles .cat-rhythm__next {
    padding-inline-start: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-articles *,
  .page-articles *::before,
  .page-articles *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
</main>