.page-products {
  --cat-line: rgba(30, 67, 89, .55);
  --cat-panel: rgba(16, 43, 63, .34);
  padding-bottom: 4rem;
  color: var(--paper);
}

/* ---------- 面包屑 ---------- */
.page-products .crumbs {
  padding: 1.2rem 0 .4rem;
}

.page-products .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-products .crumbs li + li::before {
  content: "/";
  margin-right: .4rem;
  color: var(--line);
}

.page-products .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-products .crumbs a:hover,
.page-products .crumbs a:focus-visible {
  color: var(--amber-bright);
  border-bottom-color: var(--amber);
}

/* ---------- 首屏 ---------- */
.page-products .cat-hero {
  padding: 1.25rem 0 2.5rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-products .cat-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

.page-products .cat-hero h1 {
  margin: .65rem 0 1rem;
  font-family: var(--font-head);
  font-size: clamp(30px, 7.2vw, 52px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-products .cat-hero .lede {
  max-width: 58ch;
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-products .cat-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 1.6rem;
}

.page-products .cat-hero__actions--tight {
  margin-top: 1.25rem;
}

.page-products .cat-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.6rem;
  margin: 1.9rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-products .cat-facts li {
  flex: 1 1 42%;
  min-width: 128px;
  padding: .95rem 0 .1rem;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-products .cat-facts b {
  display: block;
  margin-bottom: .15rem;
  font-family: var(--font-head);
  font-size: clamp(24px, 5vw, 30px);
  font-weight: 800;
  line-height: 1;
  color: var(--amber-bright);
  font-variant-numeric: tabular-nums;
}

.page-products .cat-hero__visual {
  order: -1;
}

.page-products .cat-plan {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-sm);
  box-shadow: 0 0 0 1px var(--line-soft);
}

/* ---------- 主体两栏 ---------- */
.page-products .cat-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  padding-top: 2.25rem;
}

.page-products .cat-flow {
  min-width: 0;
}

/* ---------- 左侧索引轴 ---------- */
.page-products .cat-rail {
  padding: .8rem 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-products .cat-rail .index-rail__label {
  margin: 0 0 .55rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-products .cat-rail .index-rail__list {
  display: flex;
  gap: .4rem;
  margin: 0;
  padding: 0 0 .2rem;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-products .index-rail__link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .35rem .55rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  color: var(--mist);
  white-space: nowrap;
  text-decoration: none;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}

.page-products .index-rail__link:hover,
.page-products .index-rail__link:focus-visible {
  color: var(--paper);
  border-color: var(--line);
  background: rgba(224, 163, 64, .09);
}

.page-products .index-rail__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--amber);
}

/* ---------- 通用区块 ---------- */
.page-products .cat-sec {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--line-soft);
}

.page-products .cat-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-products .cat-sec h2 {
  margin: .5rem 0 .85rem;
  font-family: var(--font-head);
  font-size: clamp(22px, 4.8vw, 34px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-products .cat-sec .lede {
  max-width: 66ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-products .cat-note {
  margin: 1.5rem 0 0;
  padding-left: .9rem;
  border-left: 2px solid var(--line);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-products .cat-note a,
.page-products .cat-inline-link {
  color: var(--amber-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(224, 163, 64, .45);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-products .cat-note a:hover,
.page-products .cat-inline-link:hover,
.page-products .cat-note a:focus-visible,
.page-products .cat-inline-link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 图片 ---------- */
.page-products .cat-fig {
  margin: 1.75rem 0 1.75rem;
}

.page-products .cat-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-sm);
  box-shadow: 0 0 0 1px var(--line-soft);
}

.page-products .figure__caption {
  margin-top: .7rem;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 型号索引表 ---------- */
.page-products .cat-table-wrap {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  background: rgba(10, 26, 41, .45);
  overflow: auto;
  max-height: 70vh;
}

.page-products .cat-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.page-products .cat-table th,
.page-products .cat-table td {
  padding: .58rem .7rem;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13.5px;
}

.page-products .cat-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--slate);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--mist);
  white-space: nowrap;
}

.page-products .cat-table__group th {
  padding: .55rem .7rem;
  background: rgba(198, 64, 46, .16);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--cinnabar-bright);
  text-align: left;
}

.page-products .cat-table__code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--amber-bright);
  white-space: nowrap;
}

.page-products .cat-table__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--mist);
  white-space: nowrap;
}

.page-products .cat-table .num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--paper);
}

.page-products .cat-table tbody tr:hover td,
.page-products .cat-table tbody tr:hover th {
  background: rgba(224, 163, 64, .06);
}

/* ---------- 导出清单卡片 ---------- */
.page-products .cat-lists {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-products .cat-list-card {
  display: flex;
  flex-direction: column;
  gap: .85rem;
  padding: 1.35rem 1.2rem 1.2rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--cat-panel);
}

.page-products .cat-list-card--index {
  border-top: 2px solid var(--amber);
}

.page-products .cat-list-card--export {
  border-top: 2px solid var(--cinnabar);
}

.page-products .cat-list-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

.page-products .cat-list-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-products .cat-list-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

.page-products .cat-fields {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-products .cat-fields li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: .48rem 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--paper-soft);
}

.page-products .cat-fields li span:last-child {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--mist);
  text-align: right;
}

/* ---------- 章节折叠 ---------- */
.page-products .cat-accordion {
  border-top: 1px solid var(--line-soft);
}

.page-products .cat-chapter {
  border-bottom: 1px solid var(--line-soft);
}

.page-products .cat-chapter__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: .7rem;
  padding: .95rem .15rem;
  cursor: pointer;
  list-style: none;
  transition: color .18s var(--ease);
}

.page-products .cat-chapter__sum::-webkit-details-marker {
  display: none;
}

.page-products .cat-chapter__sum::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--amber);
  transition: transform .22s var(--ease), color .18s var(--ease);
}

.page-products .cat-chapter[open] .cat-chapter__sum::after {
  content: "−";
  color: var(--amber-bright);
}

.page-products .cat-chapter__sum:hover .cat-chapter__title,
.page-products .cat-chapter__sum:focus-visible .cat-chapter__title {
  color: var(--amber-bright);
}

.page-products .cat-chapter__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-products .cat-chapter__title {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
  transition: color .18s var(--ease);
}

.page-products .cat-chapter__list {
  margin: 0;
  padding: 0 0 .85rem;
  list-style: none;
}

.page-products .cat-chapter__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .35rem .9rem;
  padding: .5rem .15rem .5rem 1.9rem;
  border-top: 1px dashed var(--cat-line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-soft);
}

.page-products .cat-chapter__sec {
  min-width: 2.4rem;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

.page-products .cat-chapter__ver {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .02em;
  color: var(--celadon-bright);
  white-space: nowrap;
}

/* ---------- 版本对照 ---------- */
.page-products .cat-builds {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-products .cat-build {
  padding: 1.35rem 1.2rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(10, 26, 41, .5);
}

.page-products .cat-build__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
  margin-bottom: .9rem;
}

.page-products .cat-build h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  color: var(--paper);
}

.page-products .cat-ticks {
  margin: 0;
  padding: 0 0 0 1.1rem;
  list-style: none;
  border-left: 1px solid var(--line-soft);
}

.page-products .cat-ticks li {
  position: relative;
  padding: 0 0 1rem 1rem;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-products .cat-ticks li:last-child {
  padding-bottom: .2rem;
}

.page-products .cat-ticks li::before {
  content: "";
  position: absolute;
  left: -1.42rem;
  top: .62rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(71, 174, 147, .18);
}

.page-products .cat-ticks--flow li::before {
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(224, 163, 64, .18);
}

.page-products .cat-ticks strong {
  font-weight: 600;
  color: var(--amber-bright);
}

.page-products .cat-ticks a {
  color: var(--amber-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(224, 163, 64, .45);
}

.page-products .cat-ticks a:hover,
.page-products .cat-ticks a:focus-visible {
  border-bottom-color: var(--amber);
}

/* ---------- 取用与收藏 ---------- */
.page-products .cat-save {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: 1.5rem 1.2rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(135deg, rgba(198, 64, 46, .14), rgba(224, 163, 64, .09));
}

.page-products .cat-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .cat-steps li {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .6rem 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-products .cat-steps li:last-child {
  border-bottom: 0;
}

.page-products .cat-save__side {
  padding: 1.1rem 1rem;
  border-radius: var(--r-sm);
  background: rgba(10, 26, 41, .55);
  box-shadow: inset 0 0 0 1px var(--line-soft);
}

.page-products .cat-save__title {
  margin: 0 0 .6rem;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-products .cat-save__side p {
  margin: 0 0 .85rem;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-products .cat-lists,
  .page-products .cat-builds {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .cat-facts li {
    flex: 1 1 auto;
  }
}

@media (min-width: 900px) {
  .page-products .cat-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
    gap: 3rem;
  }

  .page-products .cat-hero__visual {
    order: 0;
  }

  .page-products .cat-save {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
    padding: 1.75rem 1.6rem;
  }
}

@media (min-width: 1024px) {
  .page-products .cat-body {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-products .cat-rail {
    position: sticky;
    top: 2rem;
    padding: 0;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-products .cat-rail .index-rail__label {
    padding-left: .85rem;
  }

  .page-products .cat-rail .index-rail__list {
    flex-direction: column;
    gap: .1rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-products .index-rail__link {
    width: 100%;
  }

  .page-products .cat-table th,
  .page-products .cat-table td {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .index-rail__link,
  .page-products .cat-chapter__sum,
  .page-products .cat-chapter__sum::after,
  .page-products .crumbs a {
    transition: none;
  }
}