.page-products {
  --cat-line: 1px solid var(--grid-600);
  --cat-sand-wash: rgba(200, 178, 124, 0.12);
  --cat-cyan-wash: rgba(53, 240, 208, 0.08);
  --cat-gap: clamp(20px, 3vw, 40px);
  color: var(--paper-100);
  background: var(--ink-900);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-products .breadcrumb {
  padding-block: 20px 0;
  font-size: var(--fs-13);
  color: var(--slate-500);
}

.page-products .breadcrumb a {
  color: var(--slate-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-products .breadcrumb a:hover,
.page-products .breadcrumb a:focus-visible {
  color: var(--signal-cyan);
  border-bottom-color: var(--signal-cyan);
}

.page-products .breadcrumb__sep {
  margin-inline: 8px;
  color: var(--grid-600);
}

/* ---------- 首屏 ---------- */
.page-products .cat-intro {
  padding-block: clamp(24px, 4vw, 48px) clamp(28px, 4vw, 52px);
  border-bottom: var(--cat-line);
}

.page-products .cat-intro__title {
  font-family: var(--font-display);
  font-size: var(--fs-40);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  max-width: 20ch;
}

.page-products .cat-intro__lede {
  margin: 18px 0 0;
  max-width: 68ch;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: #cfd6d0;
}

.page-products .cat-paths {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid-600);
  border: var(--cat-line);
}

.page-products .cat-paths__item {
  background: var(--ink-900);
}

.page-products .cat-paths__link {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--paper-100);
  transition: background-color 200ms var(--ease);
}

.page-products .cat-paths__link:hover,
.page-products .cat-paths__link:focus-visible {
  background: var(--teal-700);
}

.page-products .cat-paths__link:focus-visible {
  outline: 2px solid var(--focus-violet);
  outline-offset: -2px;
}

.page-products .cat-paths__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--signal-cyan);
}

.page-products .cat-paths__label {
  font-family: var(--font-display);
  font-size: var(--fs-22);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-products .cat-paths__note {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--slate-500);
}

/* ---------- 章节抬头 ---------- */
.page-products .cat-sec {
  padding-block: clamp(32px, 5vw, 64px);
  border-bottom: var(--cat-line);
  scroll-margin-top: 24px;
}

.page-products .cat-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  margin-bottom: clamp(18px, 2.5vw, 28px);
}

.page-products .cat-sec__num {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--signal-cyan);
  border: var(--cat-line);
  padding: 3px 7px;
  align-self: center;
}

.page-products .cat-sec__num::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 6px;
  background: var(--signal-orange);
  vertical-align: middle;
}

.page-products .cat-sec__title {
  font-family: var(--font-display);
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0;
}

.page-products .cat-lede {
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: #cfd6d0;
}

.page-products .cat-aside-line {
  margin: 18px 0 0;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--slate-500);
  padding-left: 12px;
  border-left: 2px solid var(--grid-600);
}

.page-products .cat-aside-line a {
  color: var(--signal-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--grid-600);
}

.page-products .cat-aside-line a:hover,
.page-products .cat-aside-line a:focus-visible {
  border-bottom-color: var(--signal-cyan);
}

/* ---------- 双栏 ---------- */
.page-products .cat-split {
  display: grid;
  gap: var(--cat-gap);
}

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

.page-products .cat-split__media {
  margin: 0;
}

.page-products .media-frame {
  border: var(--cat-line);
  background: var(--charcoal-800);
  position: relative;
  overflow: hidden;
}

.page-products .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.04);
}

.page-products .media-frame--wide img {
  aspect-ratio: 21 / 9;
}

.page-products .media-frame--tall img {
  aspect-ratio: 3 / 4;
}

.page-products .media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--paper-100);
  background: rgba(10, 18, 16, 0.78);
  border-top: var(--cat-line);
  border-right: var(--cat-line);
}

/* ---------- 编号规则 ---------- */
.page-products .cat-rules {
  margin: 0;
  border-top: var(--cat-line);
}

.page-products .cat-rules__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: var(--cat-line);
}

.page-products .cat-rules dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--sand-400);
}

.page-products .cat-rules dd {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.65;
  color: #cfd6d0;
}

/* ---------- 统计行 ---------- */
.page-products .cat-stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
  padding-block: clamp(22px, 3.5vw, 38px);
  border-bottom: var(--cat-line);
  background: linear-gradient(90deg, var(--cat-cyan-wash), transparent 72%);
}

.page-products .cat-stat__num {
  font-family: var(--font-mono);
  font-size: var(--fs-56);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--signal-cyan);
  font-variant-numeric: tabular-nums;
}

.page-products .cat-stat__label {
  font-size: var(--fs-13);
  line-height: 1.6;
  color: var(--slate-500);
  max-width: 42ch;
}

/* ---------- 折叠清单 ---------- */
.page-products .cat-list {
  border-top: var(--cat-line);
}

.page-products .cat-item {
  border-bottom: var(--cat-line);
  scroll-margin-top: 24px;
}

.page-products .cat-item__summary {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px 2px;
  cursor: pointer;
  list-style: none;
  transition: background-color 200ms var(--ease);
}

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

.page-products .cat-item__summary:hover {
  background: var(--teal-700);
}

.page-products .cat-item__summary:focus-visible {
  outline: 2px solid var(--focus-violet);
  outline-offset: -2px;
}

.page-products .cat-item__code {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  color: var(--sand-400);
  letter-spacing: 0.06em;
}

.page-products .cat-item__name {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-products .cat-item__meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-products .cat-item__count {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  color: var(--signal-cyan);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-products .cat-item__sign {
  width: 14px;
  height: 14px;
  position: relative;
  flex: none;
  border: 1px solid var(--grid-600);
}

.page-products .cat-item__sign::before,
.page-products .cat-item__sign::after {
  content: "";
  position: absolute;
  background: var(--slate-500);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

.page-products .cat-item__sign::before {
  left: 3px;
  right: 3px;
  top: 6px;
  height: 1px;
}

.page-products .cat-item__sign::after {
  top: 3px;
  bottom: 3px;
  left: 6px;
  width: 1px;
}

.page-products .cat-item[open] .cat-item__sign::after {
  opacity: 0;
  transform: scaleY(0.2);
}

.page-products .cat-item[open] .cat-item__sign {
  border-color: var(--signal-cyan);
}

.page-products .cat-item__body {
  padding: 2px 2px 18px 2.2rem;
  animation: cat-reveal 220ms var(--ease);
}

@keyframes cat-reveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

.page-products .cat-item__body p {
  margin: 0 0 10px;
  font-size: var(--fs-16);
  line-height: 1.68;
  color: #cfd6d0;
  max-width: 62ch;
}

.page-products .cat-item__subs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px !important;
}

.page-products .cat-item__subs-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--slate-500);
  margin-right: 4px;
}

.page-products .tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: var(--fs-12);
  line-height: 1.6;
  color: var(--paper-100);
  background: var(--charcoal-800);
  border: 1px solid var(--grid-600);
}

.page-products .cat-item__sample {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--sand-400) !important;
  padding: 8px 10px;
  background: var(--charcoal-800);
  border-left: 2px solid var(--sand-400);
}

/* ---------- 通道对照 ---------- */
.page-products .cat-duo {
  display: grid;
  gap: 0;
}

.page-products .cat-channel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: cat-ch;
  border-top: var(--cat-line);
}

.page-products .cat-channel-list li {
  counter-increment: cat-ch;
  position: relative;
  padding: 12px 0 12px 2.4rem;
  border-bottom: var(--cat-line);
  font-size: var(--fs-13);
  line-height: 1.68;
  color: var(--slate-500);
}

.page-products .cat-channel-list li::before {
  content: counter(cat-ch, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--signal-cyan);
}

.page-products .cat-channel-list__name {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper-100);
  margin-bottom: 2px;
}

/* ---------- iOS 入口 ---------- */
.page-products .cat-ios {
  border: 1px solid var(--signal-orange);
  background: linear-gradient(160deg, rgba(255, 138, 61, 0.14), rgba(255, 138, 61, 0.02) 62%);
  padding: 18px 18px 20px;
}

.page-products .cat-ios__flag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--signal-orange);
}

.page-products .cat-ios__version {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-56);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}

.page-products .cat-ios__req {
  margin: 6px 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  color: var(--sand-400);
}

.page-products .cat-ios__text {
  margin: 0 0 16px;
  font-size: var(--fs-16);
  line-height: 1.68;
  color: #cfd6d0;
}

.page-products .cat-ios__media {
  margin: 20px 0 0;
}

.page-products .btn--ghost {
  text-decoration: none;
}

/* ---------- 三步路径 ---------- */
.page-products .cat-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
  border-top: var(--cat-line);
}

.page-products .cat-steps__item {
  position: relative;
  padding: 18px 0 18px 3rem;
  border-bottom: var(--cat-line);
}

.page-products .cat-steps__num {
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  line-height: 1;
  color: var(--signal-cyan);
}

.page-products .cat-steps__item::before {
  content: "";
  position: absolute;
  left: 1.55rem;
  top: 20px;
  bottom: -1px;
  width: 1px;
  background: var(--grid-600);
}

.page-products .cat-steps__item:last-child::before {
  display: none;
}

.page-products .cat-steps__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  line-height: 1.3;
}

.page-products .cat-steps__item p {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.68;
  color: #cfd6d0;
  max-width: 56ch;
}

/* ---------- 更新表格 ---------- */
.page-products .cat-table-wrap {
  overflow-x: auto;
  border: var(--cat-line);
  background: var(--charcoal-800);
}

.page-products .cat-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: var(--fs-13);
}

.page-products .cat-table caption {
  text-align: left;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--slate-500);
  border-bottom: var(--cat-line);
  background: var(--ink-900);
}

.page-products .cat-table th,
.page-products .cat-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--grid-600);
  text-align: left;
  font-weight: 400;
  color: #cfd6d0;
  white-space: nowrap;
}

.page-products .cat-table thead th {
  background: var(--cat-sand-wash);
  color: var(--sand-400);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
}

.page-products .cat-table tbody th[scope="row"] {
  color: var(--paper-100);
  white-space: normal;
  min-width: 9rem;
}

.page-products .cat-table__code {
  font-family: var(--font-mono);
  color: var(--sand-400) !important;
  letter-spacing: 0.06em;
}

.page-products .cat-table__num {
  font-family: var(--font-mono);
  text-align: right !important;
  font-variant-numeric: tabular-nums;
  color: var(--signal-cyan) !important;
}

.page-products .cat-table tfoot th,
.page-products .cat-table tfoot td {
  border-bottom: none;
  border-top: 1px solid var(--grid-600);
  background: var(--cat-sand-wash);
  font-weight: 700;
}

.page-products .cat-table tbody tr:hover,
.page-products .cat-table tbody tr:focus-within {
  background: var(--teal-700);
}

/* ---------- 找不到条目 ---------- */
.page-products .cat-help {
  display: grid;
  gap: var(--cat-gap);
}

.page-products .cat-help__card {
  border: var(--cat-line);
  background: var(--charcoal-800);
  padding: 18px;
}

.page-products .cat-help__card .eyebrow {
  margin: 0 0 8px;
}

.page-products .cat-help__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  line-height: 1.3;
}

.page-products .cat-help__card p {
  margin: 0 0 12px;
  font-size: var(--fs-16);
  line-height: 1.68;
  color: #cfd6d0;
}

.page-products .cat-help__card a {
  color: var(--signal-cyan);
  font-size: var(--fs-13);
  text-decoration: none;
  border-bottom: 1px solid var(--grid-600);
}

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

.page-products .cat-help__contact {
  margin: 0 !important;
}

/* ---------- 末尾横幅 ---------- */
.page-products .cat-banner {
  margin-top: clamp(32px, 5vw, 64px);
  border: var(--cat-line);
  background: var(--charcoal-800);
  display: grid;
  gap: 0;
}

.page-products .cat-banner__media {
  margin: 0;
  border: none;
  border-bottom: var(--cat-line);
}

.page-products .cat-banner__body {
  padding: 20px;
}

.page-products .cat-banner__body .eyebrow {
  margin: 0 0 10px;
}

.page-products .cat-banner__text {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: var(--fs-22);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  max-width: 30ch;
}

.page-products .cat-banner .btn--signal {
  text-decoration: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-products .cat-intro__title {
    font-size: var(--fs-56);
  }

  .page-products .cat-rules__row {
    grid-template-columns: 8rem minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-products .cat-help {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .cat-paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .cat-item__summary {
    grid-template-columns: 3rem minmax(0, 1fr) auto;
    padding: 14px 4px;
  }

  .page-products .cat-item__body {
    padding-left: 3rem;
  }
}

@media (min-width: 900px) {
  .page-products .cat-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-products .cat-split--reverse {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-products .cat-split--list {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .page-products .cat-split__media {
    position: sticky;
    top: 24px;
  }

  .page-products .cat-sec__title {
    font-size: var(--fs-40);
  }

  .page-products .cat-banner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: stretch;
  }

  .page-products .cat-banner__media {
    border-bottom: none;
    border-right: var(--cat-line);
  }

  .page-products .cat-banner__media img {
    height: 100%;
    aspect-ratio: 21 / 9;
  }

  .page-products .cat-banner__body {
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
  }
}

@media (min-width: 1180px) {
  .page-products .cat-duo {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 0;
  }

  .page-products .cat-sec--duo {
    border-bottom: none;
  }

  .page-products .cat-sec--duo:first-child {
    border-right: var(--cat-line);
    padding-right: var(--cat-gap);
  }

  .page-products .cat-sec--duo:last-child {
    padding-left: var(--cat-gap);
  }

  .page-products .cat-intro__title {
    font-size: var(--fs-56);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .cat-item__body {
    animation: none;
  }

  .page-products .cat-paths__link,
  .page-products .cat-item__summary,
  .page-products .cat-item__sign::before,
  .page-products .cat-item__sign::after {
    transition: none;
  }
}
<<<END>>>