/* ===== 版本谱系页 · 页面专属样式 ===== */
.page-products {
  --vc-gold: var(--gold);
  --vc-red: var(--cinnabar);
  --vc-line: var(--line-pale);
  --vc-card-bg: rgba(255,255,255,.72);
  --vc-shadow: var(--shadow-card);
}

.page-products .page-heading {
  margin: 1.5rem 0 2rem;
}

.page-products .page-intro {
  margin-top: .75rem;
  max-width: 46em;
  line-height: 1.75;
  color: var(--ink-muted);
}

.page-products .search-heading-row {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  margin-bottom: 1rem;
}

.page-products .version-search-block,
.page-products .archive-block,
.page-products .compare-block,
.page-products .usage-block {
  margin-top: 3rem;
}

/* ---------- 版本筛选与搜索 ---------- */
.page-products .search-board {
  position: relative;
  padding: 1.25rem;
  border: 1px solid var(--vc-line);
  border-radius: var(--radius);
  background:
    linear-gradient(45deg, rgba(26,26,26,.03) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(26,26,26,.03) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(26,26,26,.03) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(26,26,26,.03) 75%),
    var(--vc-card-bg);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  box-shadow: var(--vc-shadow);
}

.page-products .search-row {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.page-products .search-label {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: .875rem;
  letter-spacing: .08em;
}

.page-products .search-input {
  width: 100%;
  padding: .75rem 1rem;
  border: 1px solid var(--line-ink);
  border-radius: var(--radius-sm);
  background: var(--white);
  font-family: var(--font-mono);
  font-size: .875rem;
  color: var(--ink);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-products .search-input:focus {
  outline: none;
  border-color: var(--vc-gold);
  box-shadow: 0 0 0 3px rgba(201,165,74,.25);
}

.page-products .tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1rem;
}

.page-products .tag-filter .tag {
  cursor: pointer;
  border: 1px solid var(--vc-line);
  background: transparent;
  padding: .375rem .75rem;
  border-radius: 999px;
  font-size: .8125rem;
  font-family: var(--font-sans);
  transition: all var(--transition-base);
}

.page-products .tag-filter .tag[aria-pressed="true"],
.page-products .tag-filter .tag-gold {
  border-color: var(--vc-gold);
  background: rgba(201,165,74,.18);
  color: var(--ink);
}

.page-products .search-count {
  margin-top: 1rem;
  padding-top: .75rem;
  border-top: 1px dashed var(--line-ink);
  font-size: .875rem;
  color: var(--ink-muted);
}

.page-products .count-num {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  color: var(--vc-red);
}

/* ---------- 版本列表与详情 · 布局 ---------- */
.page-products .archive-grid {
  display: grid;
  gap: 1.25rem;
}

.page-products .version-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-products .cover-figure,
.page-products .timeline-figure {
  margin: 0;
  text-align: center;
}

.page-products .cover-figure img,
.page-products .timeline-figure img {
  display: block;
  width: 100%;
  max-width: 300px;
  margin-inline: auto;
  height: auto;
  border: 1px solid var(--vc-line);
  border-radius: var(--radius);
}

.page-products .cover-figure figcaption,
.page-products .timeline-figure figcaption {
  margin-top: .5rem;
  font-size: .8125rem;
  color: var(--ink-muted);
}

/* ---------- 版本目录 ---------- */
.page-products .tree-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--vc-line);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: .9375rem;
}

.page-products .caption-count {
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--vc-gold);
}

.page-products .version-tree {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .version-node + .version-node {
  border-top: 1px dashed var(--line-ink);
}

.page-products .node-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  padding: .625rem .5rem;
  text-decoration: none;
  color: var(--ink);
  border-left: 3px solid transparent;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.page-products .node-link::before {
  content: "";
  width: 10px;
  height: 10px;
  border: 2px solid var(--vc-gold);
  border-radius: 50%;
  background: var(--parchment);
  flex-shrink: 0;
}

.page-products .node-no {
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-products .node-name {
  font-size: .875rem;
  color: var(--ink-muted);
}

.page-products .node-link.is-active,
.page-products .node-link:hover {
  background: rgba(201,165,74,.12);
  border-left-color: var(--vc-gold);
}

/* ---------- 版本详情卡片 ---------- */
.page-products .version-detail-panel {
  min-width: 0;
}

.page-products .version-card {
  padding: 1.25rem;
  border: 1px solid var(--vc-line);
  border-radius: var(--radius);
  background: var(--vc-card-bg);
  box-shadow: var(--vc-shadow);
}

.page-products .version-head {
  margin-bottom: 1rem;
}

.page-products .version-badges {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: .75rem;
}

.page-products .version-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 .5rem;
}

.page-products .version-abstract {
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.6;
}

.page-products .version-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem .75rem;
  margin: 0 0 1rem;
  padding: .75rem;
  border: 1px solid var(--vc-line);
  border-radius: var(--radius-sm);
  background: rgba(242,234,217,.45);
}

.page-products .fact-item dt {
  font-size: .75rem;
  color: var(--ink-muted);
  letter-spacing: .05em;
}

.page-products .fact-item dd {
  margin: .125rem 0 0;
  font-weight: 700;
  font-size: .9375rem;
}

/* ---------- 界面演变与对比滑块 ---------- */
.page-products .evolution-figure {
  margin: 1rem 0;
}

.page-products .evolution-figure figcaption {
  margin-top: .5rem;
  font-size: .8125rem;
  color: var(--ink-muted);
  text-align: center;
}

.page-products .compare-slider-box {
  position: relative;
  aspect-ratio: 8 / 5;
  border: 1px solid var(--vc-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
  user-select: none;
}

.page-products .compare-baseline,
.page-products .compare-overlay {
  position: absolute;
  inset: 0;
}

.page-products .compare-baseline img,
.page-products .compare-overlay img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: none;
}

.page-products .compare-overlay {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 50%;
  overflow: hidden;
  border-right: 2px solid var(--vc-gold);
}

.page-products .compare-overlay img {
  width: 200%;
  height: 100%;
  object-fit: cover;
}

.page-products .compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--vc-gold);
  z-index: 2;
}

.page-products .compare-handle::after {
  content: "◂ ▸";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--brown);
  color: var(--white);
  font-size: .75rem;
  letter-spacing: .1em;
  padding: .25rem .5rem;
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 0 0 2px rgba(201,165,74,.5);
}

/* ---------- 版本详情标签 ---------- */
.page-products .detail-tabs {
  margin-top: 1.25rem;
}

.page-products .tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding-bottom: .75rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--vc-line);
}

.page-products .tab-btn,
.page-products .compare-tab-btn {
  border: 1px solid var(--vc-line);
  background: transparent;
  padding: .5rem 1rem;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: .875rem;
  color: var(--ink-muted);
  cursor: pointer;
  transition: all var(--transition-base);
}

.page-products .tab-btn:hover,
.page-products .compare-tab-btn:hover {
  border-color: var(--vc-gold);
  color: var(--ink);
}

.page-products .tab-pane + .tab-pane {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--vc-line);
}

.page-products .pane-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  margin: 0 0 .75rem;
}

.page-products .note-inline {
  margin-left: .25rem;
  font-size: .75rem;
  font-weight: 400;
  color: var(--ink-muted);
}

.page-products .feature-list {
  display: grid;
  gap: .75rem;
  margin: 0;
}

.page-products .feature-row {
  display: grid;
  grid-template-columns: 7em 1fr;
  gap: .75rem;
  padding: .75rem;
  border-left: 3px solid var(--vc-gold);
  border-radius: var(--radius-sm);
  background: rgba(242,234,217,.35);
}

.page-products .feature-row dt {
  font-weight: 700;
  color: var(--ink);
}

.page-products .feature-row dd {
  margin: 0;
  color: var(--ink-muted);
  line-height: 1.5;
}

.page-products .update-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .5rem;
}

.page-products .update-list li {
  padding: .75rem;
  border-left: 3px solid var(--vc-red);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(195,39,43,.05);
  font-size: .9375rem;
  line-height: 1.5;
}

.page-products .update-label {
  display: inline-block;
  margin-right: .5rem;
  padding: .125rem .375rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--vc-red);
  background: rgba(195,39,43,.08);
}

.page-products .flow-figure,
.page-products .announce-figure {
  margin: 1rem 0 0;
}

.page-products .flow-figure img,
.page-products .announce-figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--vc-line);
  border-radius: var(--radius);
}

.page-products .flow-figure figcaption,
.page-products .announce-figure figcaption {
  margin-top: .5rem;
  font-size: .8125rem;
  color: var(--ink-muted);
}

/* ---------- 其余版本速查 ---------- */
.page-products .other-versions {
  margin-top: 1.25rem;
  padding: 1.25rem;
  border: 1px solid var(--vc-line);
  border-radius: var(--radius);
  background: rgba(229,223,211,.42);
}

.page-products .mini-version-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .5rem;
}

.page-products .mini-item {
  display: grid;
  grid-template-columns: 4.5em 1fr;
  gap: .125rem .75rem;
  align-items: baseline;
  padding: .75rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--white);
}

.page-products .mini-item:target {
  border-color: var(--vc-gold);
  box-shadow: 0 0 0 3px rgba(201,165,74,.22);
}

.page-products .mini-no {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--vc-red);
}

.page-products .mini-name {
  font-weight: 700;
  color: var(--ink);
}

.page-products .mini-desc {
  grid-column: 1 / -1;
  margin: 0;
  font-size: .875rem;
  color: var(--ink-muted);
  line-height: 1.5;
}

/* ---------- 邻近版本对比 ---------- */
.page-products .compare-board {
  padding: 1.25rem;
  border: 1px solid var(--vc-line);
  border-radius: var(--radius);
  background: var(--vc-card-bg);
}

.page-products .compare-tabs {
  display: grid;
  gap: 1rem;
}

.page-products .compare-tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-products .compare-panel + .compare-panel {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--vc-line);
}

.page-products .compare-grid {
  display: grid;
  gap: 1rem;
}

.page-products .compare-col {
  padding: 1rem;
  border-radius: var(--radius-sm);
}

.page-products .compare-col.is-before {
  border: 1px solid rgba(195,39,43,.25);
  background: rgba(195,39,43,.04);
}

.page-products .compare-col.is-after {
  border: 1px solid var(--vc-line);
  background: rgba(201,165,74,.1);
}

.page-products .col-head {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding-bottom: .5rem;
  margin-bottom: .75rem;
  border-bottom: 1px solid var(--vc-line);
}

.page-products .col-stamp {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: .9375rem;
  color: var(--ink);
}

.page-products .col-version {
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--vc-red);
}

.page-products .diff-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .375rem;
  font-size: .875rem;
  line-height: 1.5;
  color: var(--ink-muted);
}

.page-products .diff-list li {
  padding-left: 1rem;
  position: relative;
}

.page-products .diff-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .5em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--vc-gold);
}

.page-products .compare-col.is-before .diff-list li::before {
  background: var(--vc-red);
}

.page-products .compare-mid {
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-products .compare-mid span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--vc-line);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--vc-gold);
  background: var(--parchment);
}

.page-products .compare-note {
  margin-top: 1rem;
  padding-top: .75rem;
  border-top: 1px dashed var(--vc-line);
  font-size: .8125rem;
  color: var(--ink-muted);
}

/* ---------- 使用说明 ---------- */
.page-products .usage-board {
  padding: 1.25rem;
  border-left: 4px solid var(--vc-gold);
  border-radius: var(--radius);
  background: var(--vc-card-bg);
  line-height: 1.75;
  color: var(--ink-muted);
}

.page-products .usage-board p + p {
  margin-top: .75rem;
}

.page-products .usage-board a {
  color: var(--celadon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式增强 ---------- */
@media (min-width: 640px) {
  .page-products .mini-version-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-products .compare-grid {
    grid-template-columns: 1fr 2.5rem 1fr;
    align-items: stretch;
  }

  .page-products .version-facts {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-products .search-heading-row {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
  }

  .page-products .archive-grid {
    grid-template-columns: 280px minmax(0, 1fr);
    align-items: start;
  }

  .page-products .version-sidebar {
    position: sticky;
    top: calc(var(--header-h) + 1rem);
  }

  .page-products .search-board,
  .page-products .version-card,
  .page-products .compare-board,
  .page-products .usage-board {
    padding: 1.5rem;
  }

  .page-products .version-title {
    font-size: 2rem;
  }

  .page-products .mini-version-list {
    grid-template-columns: repeat(3, 1fr);
  }
}