.page-downloads {
  --lib-zebra: color-mix(in srgb, var(--color-surface-deep) 58%, transparent);
  --lib-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

.page-downloads .lib-section {
  padding-block: var(--section-y);
}

.page-downloads .lib-section--hero {
  padding-block: var(--space-6) var(--section-y);
}

.page-downloads .lib-section--alt {
  background-color: var(--color-surface-alt);
}

/* ---------- 首屏 ---------- */
.page-downloads .lib-hero__grid {
  display: grid;
  gap: var(--space-6);
}

.page-downloads .lib-hero__title {
  margin: var(--space-2) 0 0;
  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);
}

.page-downloads .lib-hero__lede {
  margin-top: var(--space-3);
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-downloads .lib-index {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-downloads .lib-index__link {
  display: grid;
  grid-template-columns: 2.4em minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
  padding: calc(var(--space-1) * 0.75) var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background-color 140ms var(--lib-ease);
}

.page-downloads .lib-index__link:hover {
  background-color: var(--color-primary-soft);
}

.page-downloads .lib-index__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-downloads .lib-index__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

/* ---------- 首屏右侧拼贴 ---------- */
.page-downloads .lib-collage {
  display: grid;
  gap: var(--space-3);
}

.page-downloads .lib-collage__media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-downloads .lib-collage__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-downloads .lib-collage__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-downloads .lib-shape {
  padding: var(--space-3);
  border-radius: var(--radius-lg);
}

.page-downloads .lib-shape--cal {
  background-color: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
}

.page-downloads .lib-shape--roster {
  background-color: var(--color-primary-soft);
  box-shadow: var(--shadow-1);
}

.page-downloads .lib-shape--timeline {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-downloads .lib-shape__label {
  display: block;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-downloads .lib-shape--timeline .lib-shape__label {
  color: var(--color-contrast-accent);
}

.page-downloads .lib-cal {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: calc(var(--space-1) / 2);
  margin-top: var(--space-2);
}

.page-downloads .lib-cal span {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-deep);
}

.page-downloads .lib-cal .is-lit {
  background-color: var(--color-primary);
}

.page-downloads .lib-cal .is-hot {
  background-color: var(--color-accent);
}

.page-downloads .lib-roster {
  display: grid;
  gap: calc(var(--space-1) * 1.5);
  margin-top: var(--space-2);
}

.page-downloads .lib-roster__row {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr) 3.4em;
  gap: var(--space-2);
  align-items: center;
}

.page-downloads .lib-roster__row i {
  display: block;
  height: var(--space-1);
  border-radius: var(--radius-pill);
  background-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.page-downloads .lib-roster__row:nth-child(2n) i {
  background-color: color-mix(in srgb, var(--color-accent) 42%, transparent);
}

.page-downloads .lib-tl {
  position: relative;
  height: var(--space-8);
  margin-top: var(--space-2);
}

.page-downloads .lib-tl::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background-color: var(--color-contrast-line);
}

.page-downloads .lib-tl__node {
  position: absolute;
  top: 50%;
  width: var(--space-1);
  height: var(--space-1);
  margin-top: calc(var(--space-1) / -2);
  border-radius: var(--radius-pill);
  background-color: var(--color-contrast-accent);
}

.page-downloads .lib-tl__node:nth-child(1) { left: 4%; }
.page-downloads .lib-tl__node:nth-child(2) { left: 22%; }
.page-downloads .lib-tl__node:nth-child(3) { left: 39%; }
.page-downloads .lib-tl__node:nth-child(4) { left: 57%; }
.page-downloads .lib-tl__node:nth-child(5) { left: 74%; }
.page-downloads .lib-tl__node:nth-child(6) { left: 92%; }

.page-downloads .lib-figures {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.page-downloads .lib-figure {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space-1) / 2);
}

.page-downloads .lib-figure__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-ink);
}

.page-downloads .lib-figure:nth-child(1) .lib-figure__num { font-size: var(--text-figure); }
.page-downloads .lib-figure:nth-child(2) .lib-figure__num { font-size: var(--text-3xl); }
.page-downloads .lib-figure:nth-child(3) .lib-figure__num { font-size: var(--text-xl); }

.page-downloads .lib-figure:nth-child(2) { padding-bottom: var(--space-1); }
.page-downloads .lib-figure:nth-child(3) { padding-bottom: var(--space-2); }

.page-downloads .lib-figure__key {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 类别跳转条 ---------- */
.page-downloads .lib-jump {
  padding-block: var(--space-3);
  background-color: var(--color-surface);
}

.page-downloads .lib-jump__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
}

.page-downloads .lib-jump__label {
  margin-right: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-downloads .tag-filter {
  display: inline-flex;
  align-items: center;
  padding: calc(var(--space-1) * 0.75) var(--space-2);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  font-size: var(--text-xs);
  text-decoration: none;
  transition: background-color 140ms var(--lib-ease), color 140ms var(--lib-ease);
}

.page-downloads .tag-filter:hover {
  background-color: var(--color-highlight);
}

.page-downloads .tag-filter.is-active {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}

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

/* ---------- 分组标题 ---------- */
.page-downloads .lib-split {
  display: grid;
  gap: var(--space-4);
}

.page-downloads .lib-head {
  max-width: var(--measure);
}

.page-downloads .lib-head__range {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
}

.page-downloads .lib-head h2 {
  margin: var(--space-1) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-downloads .lib-head p {
  margin-top: var(--space-2);
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-downloads .lib-head a {
  color: var(--color-primary);
}

.page-downloads .lib-shot {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-downloads .lib-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-downloads .lib-shot .media-caption {
  padding: var(--space-2) 0 0;
}

/* ---------- 条目 ---------- */
.page-downloads .lib-entries {
  margin-top: var(--space-6);
  display: grid;
  gap: 2px;
}

.page-downloads .lib-entry {
  border-radius: var(--radius-sm);
  transition: background-color 140ms var(--lib-ease);
}

.page-downloads .lib-entry:nth-child(even) {
  background-color: var(--lib-zebra);
}

.page-downloads .lib-entry summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  list-style: none;
}

.page-downloads .lib-entry summary::-webkit-details-marker {
  display: none;
}

.page-downloads .lib-entry summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.page-downloads .lib-entry__no {
  flex: 0 0 3.2em;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

.page-downloads .lib-entry__name {
  flex: 1 1 auto;
  min-width: 0;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.35;
  color: var(--color-ink);
}

.page-downloads .lib-entry__type {
  flex: 0 0 auto;
  margin-left: auto;
  padding: calc(var(--space-1) / 2) var(--space-1);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-deep);
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

.page-downloads .lib-entry[open] .lib-entry__type {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
}

.page-downloads .lib-entry__cue {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  transition: transform 140ms var(--lib-ease), color 140ms var(--lib-ease);
}

.page-downloads .lib-entry[open] .lib-entry__cue {
  transform: rotate(45deg);
  color: var(--color-accent);
}

.page-downloads .lib-entry__body {
  display: grid;
  gap: var(--space-2);
  padding: 0 var(--space-3) var(--space-3);
}

.page-downloads .lib-entry__line {
  display: grid;
  gap: calc(var(--space-1) / 2);
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-downloads .lib-entry__key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-downloads .lib-entry__line a {
  color: var(--color-primary);
}

.page-downloads .lib-fields {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space-1) / 2);
}

.page-downloads .lib-field {
  padding: calc(var(--space-1) / 2) var(--space-1);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-deep);
  color: var(--color-ink-soft);
  font-size: var(--text-xs);
}

.page-downloads .quote {
  margin: var(--space-6) 0 0;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  background-color: var(--color-highlight);
  color: var(--color-ink);
  max-width: var(--measure);
}

.page-downloads .quote p {
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
}

/* ---------- 收尾深底区 ---------- */
.page-downloads .lib-outro {
  padding-block: var(--section-y-lg);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-downloads .lib-outro__grid {
  display: grid;
  gap: var(--space-6);
}

.page-downloads .lib-outro__eyebrow {
  color: var(--color-contrast-accent);
}

.page-downloads .lib-outro h2 {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-downloads .lib-outro__lede {
  margin-top: var(--space-3);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-downloads .lib-outro a {
  color: var(--color-contrast-accent);
  text-underline-offset: 3px;
}

.page-downloads .lib-outro a:focus-visible {
  outline: 2px solid var(--color-contrast-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.page-downloads .lib-outro__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-downloads .lib-outro__list li {
  display: grid;
  grid-template-columns: 2em minmax(0, 1fr);
  gap: var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 88%, transparent);
}

.page-downloads .lib-outro__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
  padding-top: calc(var(--space-1) * 0.75);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-downloads .lib-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-4);
  }

  .page-downloads .lib-entry__line {
    grid-template-columns: 6.5em minmax(0, 1fr);
    gap: var(--space-2);
  }

  .page-downloads .lib-entry__key {
    padding-top: calc(var(--space-1) / 2);
  }
}

@media (min-width: 1024px) {
  .page-downloads .lib-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: var(--gutter);
    align-items: start;
  }

  .page-downloads .lib-collage {
    display: block;
    position: relative;
  }

  .page-downloads .lib-shape {
    position: relative;
  }

  .page-downloads .lib-shape--cal {
    width: 74%;
    margin-top: calc(var(--space-6) * -1);
  }

  .page-downloads .lib-shape--roster {
    width: 68%;
    margin-left: 32%;
    margin-top: calc(var(--space-4) * -1);
  }

  .page-downloads .lib-shape--timeline {
    width: 62%;
    margin-left: 6%;
    margin-top: calc(var(--space-3) * -1);
  }

  .page-downloads .lib-split {
    grid-template-columns: 6fr 5fr;
    gap: var(--gutter);
    align-items: start;
  }

  .page-downloads .lib-split--reverse {
    grid-template-columns: 5fr 6fr;
  }

  .page-downloads .lib-outro__grid {
    grid-template-columns: 5fr 6fr;
    gap: var(--space-8);
    align-items: start;
  }

  .page-downloads .lib-entries {
    margin-top: var(--space-8);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-downloads .lib-index__link,
  .page-downloads .tag-filter,
  .page-downloads .lib-entry,
  .page-downloads .lib-entry__cue {
    transition: none;
  }
}