.page-products {
  --pd-rail-w: 196px;
  --pd-shadow-soft: 0 1px 0 rgba(28, 27, 24, .04), 0 10px 22px -18px rgba(28, 27, 24, .45);
  --pd-shadow-lift: 0 2px 0 rgba(28, 27, 24, .05), 0 18px 30px -20px rgba(28, 27, 24, .55);
}

.page-products .pd-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-block: 18px 56px;
}

/* ---------- 左侧索引条 ---------- */
.page-products .pd-rail {
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding-block: 12px;
}

.page-products .pd-rail__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ink-2);
}

.page-products .pd-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-products .pd-rail__list a {
  display: block;
  white-space: nowrap;
  padding: 6px 11px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-2);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.page-products .pd-rail__list a:hover {
  border-color: var(--line-strong);
  color: var(--ink);
  background: var(--paper-2);
}

.page-products .pd-rail__list a:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

.page-products .pd-rail__list a[aria-current="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-products .pd-rail__cta {
  margin-top: 12px;
}

/* ---------- 首屏框景 ---------- */
.page-products .pd-hero {
  position: relative;
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(130% 80% at 88% -12%, rgba(169, 192, 199, .30), transparent 62%),
    linear-gradient(180deg, rgba(234, 226, 212, .55), transparent 40%),
    var(--paper);
  padding: clamp(20px, 3.2vw, 40px);
  overflow: hidden;
}

.page-products .pd-hero::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px solid var(--line);
  pointer-events: none;
}

.page-products .pd-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  align-items: start;
}

.page-products .pd-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(27px, 4.6vw, 52px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--ink);
}

.page-products .pd-hero h1 b {
  font-weight: 700;
  display: inline-block;
  position: relative;
}

.page-products .pd-hero h1 b::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .08em;
  height: 6px;
  background: var(--cinnabar-2);
  opacity: .55;
  z-index: -1;
}

.page-products .pd-hero__lead {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-products .pd-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 2.6vw, 28px);
}

/* ---------- 首屏数据条 ---------- */
.page-products .pd-stats {
  margin-top: clamp(22px, 3vw, 32px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-products .pd-stat {
  background: var(--paper);
  padding: 13px 14px 15px;
}

.page-products .pd-stat__num {
  display: block;
  font-size: clamp(19px, 2.3vw, 26px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-products .pd-stat:nth-child(2) .pd-stat__num,
.page-products .pd-stat:nth-child(3) .pd-stat__num {
  color: var(--silver);
}

.page-products .pd-stat:nth-child(4) .pd-stat__num {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--cinnabar);
  letter-spacing: .02em;
}

.page-products .pd-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--ink-2);
}

/* ---------- 图片基类 ---------- */
.page-products .pd-fig {
  position: relative;
  margin: 0;
  display: block;
}

.page-products .pd-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
}

.page-products .pd-fig__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 4px 8px;
  font-size: 10.5px;
  letter-spacing: .12em;
  background: var(--ink);
  color: var(--paper);
}

.page-products .pd-hero__media .pd-fig__cap,
.page-products .pd-hero__media.pd-fig .pd-fig__cap {
  display: none;
}

/* ---------- 章节抬头 ---------- */
.page-products .pd-section {
  padding-top: clamp(40px, 6vw, 76px);
}

.page-products .pd-head {
  display: grid;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-products .pd-head__num {
  display: block;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-products .pd-head h2 {
  margin: 0;
  font-size: clamp(21px, 2.7vw, 32px);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-products .pd-head p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-products .pd-note {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 68ch;
  padding-left: 14px;
  border-left: 2px solid var(--silver-2);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 三种翻法 ---------- */
.page-products .pd-lenses {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-products .pd-lens {
  border: 1px solid var(--line);
  background: var(--paper-2);
  padding: 18px 18px 20px;
  transition: transform .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-products .pd-lens:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--pd-shadow-soft);
}

.page-products .pd-lens__num {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--silver);
}

.page-products .pd-lens h3 {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-products .pd-lens p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-2);
}

/* ---------- 筛选 ---------- */
.page-products .pd-filter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  align-items: start;
}

.page-products .pd-chipset {
  margin-top: 20px;
}

.page-products .pd-chipset:first-child {
  margin-top: 0;
}

.page-products .pd-chipset__label {
  margin: 0 0 9px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-2);
}

.page-products .pd-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-products .pd-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1;
  padding: 9px 13px;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  cursor: pointer;
  transition: background-color .16s var(--ease), border-color .16s var(--ease), color .16s var(--ease), transform .16s var(--ease);
}

.page-products .pd-chip:hover {
  transform: translateY(-1px);
  border-color: var(--silver);
  color: var(--ink);
}

.page-products .pd-chip:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
}

.page-products .pd-chip[aria-pressed="true"] {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--paper);
}

.page-products .pd-filter__fig {
  max-width: 300px;
}

/* ---------- 主题簇 ---------- */
.page-products .pd-clusters {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  align-items: start;
}

.page-products .pd-clusters__fig {
  max-width: 320px;
}

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

.page-products .pd-cluster-list li {
  display: grid;
  grid-template-columns: 2.4em minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 10px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--line);
  transition: background-color .16s var(--ease), padding-left .16s var(--ease);
}

.page-products .pd-cluster-list li:hover {
  background: var(--paper-2);
  padding-left: 10px;
}

.page-products .pd-cluster-list__id {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-products .pd-cluster-list__name {
  font-size: 15px;
  color: var(--ink);
}

.page-products .pd-cluster-list__count {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-2);
}

/* ---------- 条目卡 ---------- */
.page-products .pd-entries {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-products .pd-entry {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--pd-shadow-soft);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease), transform .18s var(--ease);
}

.page-products .pd-entry:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--pd-shadow-lift);
}

.page-products .pd-entry[open] {
  border-color: var(--silver);
}

.page-products .pd-entry summary {
  position: relative;
  display: grid;
  gap: 9px;
  padding: 16px 44px 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-products .pd-entry summary::-webkit-details-marker {
  display: none;
}

.page-products .pd-entry summary:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: -2px;
}

.page-products .pd-entry summary::after {
  content: "＋";
  position: absolute;
  right: 16px;
  top: 18px;
  font-size: 13px;
  color: var(--silver);
  transition: color .16s var(--ease);
}

.page-products .pd-entry[open] summary::after {
  content: "－";
  color: var(--cinnabar);
}

.page-products .pd-entry__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-products .pd-entry__id {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-products .pd-entry__ver {
  font-size: 10.5px;
  letter-spacing: .08em;
  padding: 2px 7px;
  border: 1px solid var(--silver-2);
  color: var(--silver);
  border-radius: 2px;
}

.page-products .pd-entry__title {
  display: block;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-products .pd-entry__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-2);
}

.page-products .pd-entry__body {
  padding: 14px 18px 18px;
  border-top: 1px dashed var(--line-strong);
}

.page-products .pd-entry__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-products .pd-entry__stamp {
  margin-top: 10px !important;
  font-size: 11.5px !important;
  letter-spacing: .05em;
  color: var(--silver) !important;
}

.page-products .pd-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.page-products .pd-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  padding: 3px 8px;
  border: 1px solid var(--line);
  background: var(--paper-2);
  color: var(--ink-2);
  border-radius: 2px;
}

/* ---------- 版本深色块 ---------- */
.page-products .pd-dark {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(22px, 3.6vw, 44px);
  border: 1px solid var(--ink);
}

.page-products .pd-dark::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px solid var(--line-light);
  pointer-events: none;
}

.page-products .pd-dark__head {
  position: relative;
  display: grid;
  gap: 10px;
  max-width: 66ch;
}

.page-products .pd-dark__head .pd-head__num {
  color: var(--gold);
}

.page-products .pd-dark__head h2 {
  margin: 0;
  font-size: clamp(21px, 2.7vw, 32px);
  font-weight: 300;
  line-height: 1.3;
  color: var(--paper);
}

.page-products .pd-dark__head p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 239, 230, .78);
}

.page-products .pd-dark__fig {
  position: relative;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-products .pd-dark__fig img {
  border-color: var(--line-light);
  background: var(--ink-soft);
}

.page-products .pd-dark__fig .pd-fig__cap {
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 版本刻度 ---------- */
.page-products .pd-timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-products .pd-timeline__item {
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-products .pd-timeline__dot {
  width: 9px;
  height: 9px;
  border: 1px solid var(--silver-2);
  background: transparent;
}

.page-products .pd-timeline__item--now .pd-timeline__dot {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-products .pd-timeline__ver {
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--paper);
}

.page-products .pd-timeline__item--now .pd-timeline__ver {
  color: var(--cinnabar-2);
}

.page-products .pd-timeline__note {
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(244, 239, 230, .62);
}

.page-products .pd-dark__link {
  position: relative;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-light);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 239, 230, .78);
}

.page-products .pd-dark__link a {
  color: var(--cinnabar-2);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 179, 158, .5);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-products .pd-dark__link a:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-products .pd-dark__link a:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

/* ---------- 更新流程 ---------- */
.page-products .pd-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-products .pd-flow__step {
  padding: 18px 4px 20px;
  border-bottom: 1px solid var(--line);
}

.page-products .pd-flow__num {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--silver);
}

.page-products .pd-flow__step h3 {
  margin: 8px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-products .pd-flow__step p {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 页尾引导 ---------- */
.page-products .pd-section--last {
  padding-bottom: clamp(48px, 6vw, 72px);
}

.page-products .pd-outro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 32px);
  align-items: start;
  border-top: 1px solid var(--line-strong);
  padding-top: clamp(22px, 3vw, 32px);
}

.page-products .pd-outro__body h2 {
  margin: 10px 0 0;
  font-size: clamp(21px, 2.7vw, 32px);
  font-weight: 400;
  line-height: 1.3;
  color: var(--ink);
}

.page-products .pd-outro__body p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-products .pd-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-products .pd-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .pd-lenses {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
  }

  .page-products .pd-lens {
    border: 0;
  }

  .page-products .pd-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    padding-top: 22px;
  }

  .page-products .pd-timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 26px;
    height: 1px;
    background: var(--line-light);
  }

  .page-products .pd-timeline__item {
    position: relative;
  }
}

@media (min-width: 820px) {
  .page-products .pd-entries {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 16px;
  }

  .page-products .pd-entry:nth-child(even) {
    margin-top: 30px;
  }

  .page-products .pd-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 24px;
  }

  .page-products .pd-flow__step {
    border-bottom: 0;
    border-top: 2px solid var(--line-strong);
    padding-top: 14px;
  }

  .page-products .pd-flow__step:nth-child(2) {
    border-top-color: var(--silver-2);
  }

  .page-products .pd-flow__step:nth-child(3) {
    border-top-color: var(--cinnabar);
  }
}

@media (min-width: 900px) {
  .page-products .pd-layout {
    grid-template-columns: var(--pd-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    padding-block: 34px 88px;
  }

  .page-products .pd-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    align-self: start;
    border-top: 0;
    border-bottom: 0;
    padding-block: 0;
  }

  .page-products .pd-rail__label {
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line-strong);
  }

  .page-products .pd-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-products .pd-rail__list a {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 9px 10px;
    font-size: 13px;
    transition: background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
  }

  .page-products .pd-rail__list a[aria-current="true"] {
    background: var(--paper-2);
    border-left-color: var(--cinnabar);
    color: var(--ink);
  }

  .page-products .pd-rail__cta {
    margin-top: 18px;
  }

  .page-products .pd-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-products .pd-hero__media {
    padding-top: 6px;
  }

  .page-products .pd-filter {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }

  .page-products .pd-filter__fig {
    max-width: none;
  }

  .page-products .pd-clusters {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  }

  .page-products .pd-clusters__fig {
    max-width: none;
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-products .pd-outro {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 3.5vw, 44px);
  }

  .page-products .pd-section--last {
    padding-bottom: clamp(48px, 5vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pd-chip,
  .page-products .pd-entry,
  .page-products .pd-lens,
  .page-products .pd-cluster-list li,
  .page-products .pd-rail__list a {
    transition: none;
  }

  .page-products .pd-entry:hover,
  .page-products .pd-lens:hover,
  .page-products .pd-chip:hover {
    transform: none;
  }
}
<<<END>>>