.page-downloads {
  --lib-hair: color-mix(in srgb, var(--color-ink) 22%, transparent);
}

/* ── 首屏 ───────────────────────────────── */
.page-downloads .lib-hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-6) 0 var(--section-y);
  border-bottom: var(--border-thick) solid var(--color-ink);
  overflow: hidden;
}

.page-downloads .lib-hero .crumbs__link,
.page-downloads .lib-hero .crumbs__current {
  color: var(--color-contrast-ink);
}

.page-downloads .lib-hero .crumbs__link {
  text-decoration: underline;
  text-decoration-color: var(--color-contrast-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.page-downloads .lib-hero__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

.page-downloads .lib-hero__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: var(--tracking-heading);
  margin: var(--space-4) 0 0;
  color: var(--color-contrast-ink);
}

.page-downloads .lib-hero__title em {
  display: block;
  font-style: normal;
  font-size: var(--text-lg);
  font-weight: var(--weight-body);
  letter-spacing: 0.06em;
  line-height: var(--leading-body);
  color: var(--color-contrast-accent);
  margin-top: var(--space-3);
}

.page-downloads .lib-hero__lead {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-downloads .lib-hero__lead .hl-box {
  background: var(--color-highlight);
  color: var(--color-ink);
  padding: 0 4px;
}

.page-downloads .lib-hero__media {
  border: var(--border-thick) solid var(--color-contrast-ink);
  box-shadow: 8px 8px 0 var(--color-contrast-accent);
}

.page-downloads .lib-hero__media img,
.page-downloads .lib-entries__fig img,
.page-downloads .lib-access__fig img {
  max-width: 100%;
  display: block;
}

/* ── 首屏拼贴 ─────────────────────────────── */
.page-downloads .lib-collage {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-2);
  align-items: start;
  margin-top: var(--space-8);
}

.page-downloads .lib-tile {
  border: var(--border-thick) solid var(--color-ink);
  background: var(--color-surface);
  color: var(--color-ink);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  justify-content: flex-end;
  min-height: 140px;
}

.page-downloads .lib-tile__count {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-downloads .lib-tile__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0;
}

.page-downloads .lib-tile__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-downloads .lib-tile--lead {
  grid-column: 1 / span 5;
  grid-row: 1;
  min-height: 244px;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: 10px 10px 0 var(--color-accent);
}

.page-downloads .lib-tile--lead .lib-tile__count,
.page-downloads .lib-tile--lead .lib-tile__desc {
  color: var(--color-primary-ink);
}

.page-downloads .lib-tile--lead .lib-tile__name {
  font-size: var(--text-2xl);
}

.page-downloads .lib-tile--b {
  grid-column: 6 / span 4;
  grid-row: 1;
  min-height: 158px;
  border-width: var(--border-thin);
  box-shadow: 6px 6px 0 var(--color-primary);
}

.page-downloads .lib-tile--c {
  grid-column: 10 / span 3;
  grid-row: 1;
  min-height: 196px;
  box-shadow: 6px 6px 0 var(--color-contrast-accent);
}

.page-downloads .lib-tile--d {
  grid-column: 1 / span 4;
  grid-row: 2;
  min-height: 168px;
  border-width: var(--border-thin);
  box-shadow: 8px 8px 0 var(--color-contrast-accent);
}

.page-downloads .lib-tile--e {
  grid-column: 5 / span 5;
  grid-row: 2;
  min-height: 214px;
  box-shadow: 6px 6px 0 var(--color-primary);
}

.page-downloads .lib-stat {
  grid-column: 10 / span 3;
  grid-row: 2;
  border: var(--border-thick) solid var(--color-accent);
  background: var(--color-contrast-surface);
  box-shadow: 8px 8px 0 var(--color-primary);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  justify-content: center;
  min-height: 168px;
}

.page-downloads .lib-stat .figure__num {
  font-size: var(--text-4xl);
}

.page-downloads .lib-stat .figure__label {
  color: var(--color-contrast-ink);
}

/* ── 条目清单 ─────────────────────────────── */
.page-downloads .lib-entries__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: end;
}

.page-downloads .lib-entries__fig {
  border: var(--border-thick) solid var(--color-ink);
  box-shadow: var(--shadow-1);
}

.page-downloads .filter-bar {
  margin-top: var(--space-6);
}

.page-downloads .lib-list {
  display: grid;
  grid-template-columns: 1fr;
  column-gap: var(--space-8);
  row-gap: var(--space-6);
  margin-top: var(--space-8);
  align-items: start;
}

.page-downloads .lib-item {
  position: relative;
  border: var(--border-thick) solid var(--color-ink);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
  padding: var(--space-6) var(--space-3) var(--space-3);
  transition: box-shadow 180ms ease, transform 180ms ease;
}

.page-downloads .lib-item:hover {
  box-shadow: 8px 8px 0 var(--color-ink);
  transform: translate(-2px, -2px);
}

.page-downloads .lib-item__num {
  position: absolute;
  top: -20px;
  left: var(--space-2);
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  background: var(--color-surface);
  padding: 0 var(--space-1);
  pointer-events: none;
}

.page-downloads .lib-item .tag {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
}

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

.page-downloads .lib-item__line {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-downloads .lib-item__key {
  display: inline-block;
  min-width: 3.2em;
  margin-right: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

/* ── 适用对象表 ───────────────────────────── */
.page-downloads .lib-table-wrap {
  margin-top: var(--space-6);
  overflow-x: auto;
  border: var(--border-thick) solid var(--color-ink);
  background: var(--color-surface);
  box-shadow: var(--shadow-2);
}

.page-downloads .lib-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-downloads .lib-table th,
.page-downloads .lib-table td {
  padding: var(--space-2);
  text-align: left;
  vertical-align: top;
  line-height: var(--leading-body);
  border-bottom: var(--border-thin) solid var(--lib-hair);
}

.page-downloads .lib-table tbody tr:last-child th,
.page-downloads .lib-table tbody tr:last-child td {
  border-bottom: none;
}

.page-downloads .lib-table thead th {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  border-bottom: none;
}

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

.page-downloads .lib-table__who {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  padding: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}

.page-downloads .lib-table a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-downloads .lib-table a:hover {
  color: var(--color-focus);
}

/* ── 获取与使用 ───────────────────────────── */
.page-downloads .lib-access {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
  align-items: start;
}

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

.page-downloads .lib-step {
  position: relative;
  border: var(--border-thick) solid var(--color-ink);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-8);
}

.page-downloads .lib-step__num {
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-primary);
}

.page-downloads .lib-step__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: var(--tracking-heading);
  margin: 0;
  color: var(--color-ink);
}

.page-downloads .lib-step__text {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-downloads .lib-access__fig {
  border: var(--border-thick) solid var(--color-ink);
  box-shadow: var(--shadow-2);
}

.page-downloads .lib-limits {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-downloads .lib-limits__list {
  margin: var(--space-2) 0 0;
  padding-left: 1.2em;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
}

.page-downloads .lib-limits__list li + li {
  margin-top: var(--space-1);
}

/* ── 相关入口 ─────────────────────────────── */
.page-downloads .section--deep .sec-head__kicker {
  color: var(--color-contrast-accent);
}

.page-downloads .section--deep .sec-head__title {
  color: var(--color-contrast-ink);
}

.page-downloads .section--deep .sec-head__desc {
  color: var(--color-contrast-ink);
}

.page-downloads .lib-routes {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-2);
  margin-top: var(--space-6);
  align-items: stretch;
}

.page-downloads .lib-route {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  border: var(--border-thick) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
  text-decoration: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.page-downloads .lib-route--a { grid-column: 1 / span 5; }
.page-downloads .lib-route--b { grid-column: 6 / span 3; }
.page-downloads .lib-route--c { grid-column: 9 / span 4; }
.page-downloads .lib-route--d { grid-column: 1 / span 7; }
.page-downloads .lib-route--e { grid-column: 8 / span 5; }

.page-downloads .lib-route:hover {
  border-color: var(--color-contrast-accent);
  transform: translateY(-4px);
}

.page-downloads .lib-route:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 4px;
}

.page-downloads .lib-route__num {
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  color: var(--color-contrast-accent);
}

.page-downloads .lib-route__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
}

.page-downloads .lib-route__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-downloads .lib-route__go {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  padding-top: var(--space-2);
}

/* ── 响应式 ───────────────────────────────── */
@media (min-width: 900px) {
  .page-downloads .lib-hero__top {
    grid-template-columns: 1.15fr 1fr;
    gap: var(--space-8);
    align-items: center;
  }

  .page-downloads .lib-entries__head {
    grid-template-columns: 1.35fr 1fr;
    gap: var(--space-8);
  }

  .page-downloads .lib-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-downloads .lib-item:nth-child(odd) {
    grid-column: 1;
  }

  .page-downloads .lib-item:nth-child(even) {
    grid-column: 2;
    margin-top: var(--space-6);
  }

  .page-downloads .lib-access {
    grid-template-columns: 1.25fr 1fr;
    gap: var(--space-8);
  }

  .page-downloads .lib-limits {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }
}

@media (max-width: 899px) {
  .page-downloads .lib-collage {
    grid-template-columns: 1fr;
  }

  .page-downloads .lib-tile,
  .page-downloads .lib-stat {
    grid-column: auto;
    grid-row: auto;
    min-height: 0;
  }

  .page-downloads .lib-tile--lead {
    min-height: 200px;
  }

  .page-downloads .lib-routes {
    grid-template-columns: 1fr;
  }

  .page-downloads .lib-route {
    grid-column: auto;
  }

  .page-downloads .lib-stat .figure__num {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 600px) {
  .page-downloads .lib-item {
    padding: var(--space-6) var(--space-2) var(--space-2);
  }

  .page-downloads .lib-item__num {
    font-size: var(--text-2xl);
    top: -16px;
  }

  .page-downloads .lib-step {
    padding: var(--space-2) var(--space-2) var(--space-2) var(--space-6);
  }

  .page-downloads .lib-step__num {
    left: var(--space-2);
  }

  .page-downloads .lib-hero__media {
    box-shadow: 6px 6px 0 var(--color-contrast-accent);
  }

  .page-downloads .lib-tile--lead {
    box-shadow: 6px 6px 0 var(--color-accent);
  }
}