/* ============================================================
   专栏内容 / 条目流 —— page-articles
   ============================================================ */

.page-articles .art-hero {
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--color-primary-soft) 60%, transparent) 0%,
      transparent 240px
    );
}

.page-articles .breadcrumb {
  margin-bottom: var(--space-3);
}

.page-articles .art-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);
  word-break: break-word;
}

.page-articles .art-hero__lede {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-articles .art-hero__rule {
  margin: var(--space-4) 0 var(--space-4);
}

.page-articles .art-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.page-articles .art-hero__figure {
  margin: 0;
}

.page-articles .art-hero__figure .figure__frame {
  aspect-ratio: 820 / 560;
}

.page-articles .art-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-2);
}

.page-articles .art-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-articles .art-stat__num {
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.95;
  letter-spacing: 0.01em;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.page-articles .art-stat--accent .art-stat__num {
  color: var(--color-accent);
}

.page-articles .art-stat__label {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.page-articles .art-stat__meta {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-muted);
}

/* ---------- 条目流 ---------- */

.page-articles .art-stream {
  padding-block: var(--section-y);
}

.page-articles .art-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2);
  margin: var(--space-4) 0 var(--space-3);
  background: var(--color-surface-alt);
  border: 3px double var(--color-primary);
}

.page-articles .art-filter__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  padding-right: var(--space-2);
  border-right: 1px dotted var(--color-line);
}

.page-articles .filter-btn {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  padding: 5px 12px;
  background: var(--color-surface);
  color: var(--color-ink);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease;
}

.page-articles .filter-btn:hover {
  background: var(--color-highlight);
  border-color: var(--color-primary);
}

.page-articles .filter-btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-articles .filter-btn.is-active,
.page-articles .filter-btn[aria-pressed="true"] {
  background: var(--color-highlight);
  border-color: var(--color-accent);
  color: var(--color-ink);
}

.page-articles .filter-count {
  margin-left: auto;
  padding-left: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

.page-articles .art-empty {
  margin: 0 0 var(--space-3);
  padding: var(--space-3) 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  border-bottom: 1px dotted var(--color-line);
}

.page-articles .entry-list {
  border-top: 3px double var(--color-line);
}

.page-articles .entry {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  grid-template-areas:
    "num main"
    ". side";
  gap: var(--space-1) var(--space-2);
  padding: var(--space-3) 0 var(--space-3) var(--space-2);
  border-bottom: 1px dotted var(--color-line);
  transition: background-color 160ms ease;
}

.page-articles .entry:hover {
  background: var(--color-surface-alt);
}

.page-articles .entry.is-current::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-3);
  width: 3px;
  height: 30px;
  background: var(--color-accent);
}

.page-articles .entry__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.page-articles .entry__main {
  grid-area: main;
  min-width: 0;
}

.page-articles .entry__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-articles .entry__excerpt {
  margin: 0;
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
}

.page-articles .entry__more {
  margin-top: var(--space-1);
}

.page-articles .entry__more > summary {
  display: inline-block;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-primary);
  border-bottom: 1px dotted var(--color-primary);
}

.page-articles .entry__more > summary::-webkit-details-marker {
  display: none;
}

.page-articles .entry__more > summary::after {
  content: " +";
  color: var(--color-accent);
}

.page-articles .entry__more[open] > summary::after {
  content: " −";
}

.page-articles .entry__more > summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-articles .entry__note {
  margin: var(--space-2) 0 0;
  padding-left: var(--space-2);
  max-width: 62ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  border-left: 2px solid var(--color-accent);
}

.page-articles .entry__note a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}

.page-articles .entry__side {
  grid-area: side;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
}

.page-articles .entry__meta {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.page-articles .art-stream__figure {
  margin: var(--space-4) 0;
}

.page-articles .art-stream__figure .figure__frame {
  aspect-ratio: 720 / 440;
}

/* ---------- 四个主题标签 ---------- */

.page-articles .art-tags {
  padding-block: var(--section-y);
}

.page-articles .art-tags__lede {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-articles .art-tags__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-articles .art-tag {
  padding: var(--space-3) var(--space-2);
  background: var(--color-surface);
  border-top: 3px double var(--color-primary);
}

.page-articles .art-tag__icon {
  display: block;
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-2);
  color: var(--color-primary);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: square;
}

.page-articles .art-tag__name {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-articles .art-tag__scope,
.page-articles .art-tag__rule {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .art-tag__rule {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px dotted var(--color-line);
  color: var(--color-ink);
}

.page-articles .art-tags__figure {
  margin: var(--space-4) 0 0;
}

.page-articles .art-tags__figure .figure__frame {
  aspect-ratio: 760 / 480;
}

/* ---------- 赛季周期笔记 ---------- */

.page-articles .art-series {
  padding-block: var(--section-y-lg);
}

.page-articles .art-series__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
  align-items: start;
}

.page-articles .art-series__text .lede {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  color: var(--color-ink);
}

.page-articles .art-series__list {
  list-style: none;
  counter-reset: art-series;
  margin: 0 0 var(--space-3);
  padding: 0;
  border-top: 1px dotted var(--color-line);
}

.page-articles .art-series__list li {
  position: relative;
  counter-increment: art-series;
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  border-bottom: 1px dotted var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-articles .art-series__list li::before {
  content: counter(art-series, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

.page-articles .art-series__list strong {
  color: var(--color-ink);
  font-weight: 600;
}

.page-articles .art-series__figure {
  margin: 0;
}

.page-articles .art-series__figure .figure__frame {
  aspect-ratio: 840 / 520;
}

/* ---------- 阅读索引与更新节奏 ---------- */

.page-articles .art-index {
  padding-block: var(--section-y);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-articles .art-index .sec-num {
  color: var(--color-contrast-accent);
}

.page-articles .art-index .sec-title {
  color: var(--color-contrast-ink);
}

.page-articles .art-index .sec-kicker {
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-articles .art-index .sec-head {
  border-bottom-color: var(--color-contrast-line);
}

.page-articles .art-index__rhythm {
  margin: var(--space-4) 0 0;
  padding-bottom: var(--space-3);
  border-bottom: 1px dotted var(--color-contrast-line);
}

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

.page-articles .art-index__facts {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-contrast-accent);
}

.page-articles .art-index__toc {
  margin-top: var(--space-4);
}

.page-articles .art-index .toc__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
}

.page-articles .art-index .toc__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 var(--space-3);
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
}

.page-articles .art-index .toc__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: 7px 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  text-decoration: none;
  color: var(--color-contrast-ink);
  border-bottom: 1px dotted var(--color-contrast-line);
  transition: color 160ms ease, border-color 160ms ease;
}

.page-articles .art-index .toc__link:hover,
.page-articles .art-index .toc__link:focus-visible,
.page-articles .art-index .toc__link[aria-current="true"] {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.page-articles .art-index .toc__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-articles .art-tags__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-articles .art-index .toc__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-articles .art-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
  }

  .page-articles .art-hero__stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-articles .entry {
    grid-template-columns: 64px minmax(0, 1fr) 168px;
    grid-template-areas: "num main side";
    gap: var(--space-1) var(--space-3);
    padding-block: var(--space-4);
  }

  .page-articles .entry__side {
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-start;
    text-align: right;
  }

  .page-articles .art-stream__figure {
    max-width: 720px;
    margin-inline: auto;
  }

  .page-articles .art-series__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
    gap: var(--space-6);
  }
}

@media (min-width: 980px) {
  .page-articles .art-tags__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-articles .art-index .toc__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-articles .entry,
  .page-articles .filter-btn,
  .page-articles .art-index .toc__link {
    transition: none;
  }
}