.page-products {
  --pf-line: rgba(30, 42, 69, 0.9);
  --pf-line-soft: rgba(30, 42, 69, 0.55);
  --pf-line-faint: rgba(30, 42, 69, 0.32);
  --pf-cyan-soft: rgba(56, 232, 255, 0.09);
  --pf-cyan-edge: rgba(56, 232, 255, 0.22);
  --pf-panel: rgba(11, 18, 38, 0.6);
}

.page-products .section {
  padding-top: clamp(52px, 8vw, 104px);
}

.page-products .pf-breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */

.page-products .pf-hero {
  position: relative;
  padding-top: clamp(18px, 3vw, 34px);
  padding-bottom: clamp(6px, 2vw, 18px);
  overflow: hidden;
}

.page-products .pf-hero::before {
  content: "";
  position: absolute;
  inset: -90px -12% auto -12%;
  height: 460px;
  background:
    radial-gradient(58% 100% at 20% 0%, rgba(56, 232, 255, 0.15), transparent 68%),
    radial-gradient(52% 92% at 80% 8%, rgba(138, 107, 255, 0.13), transparent 70%),
    radial-gradient(46% 80% at 50% 100%, rgba(6, 43, 51, 0.55), transparent 72%);
  pointer-events: none;
}

.page-products .pf-hero__cols {
  position: relative;
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  align-items: end;
}

.page-products .pf-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 8.4vw, 78px);
  font-weight: 300;
  line-height: 1.06;
  letter-spacing: -0.012em;
  color: var(--mist-050);
}

.page-products .pf-hero__lede {
  margin-top: clamp(16px, 2.4vw, 26px);
  max-width: 36em;
}

.page-products .pf-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 3vw, 30px) 0 0;
}

/* ---------- 目录 ---------- */

.page-products .pf-toc {
  border-top: 1px solid var(--pf-line);
  padding-top: 16px;
}

.page-products .pf-toc__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--slate-400);
}

.page-products .pf-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .pf-toc__list a {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  color: var(--slate-400);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--pf-line-faint);
  transition: color 0.18s var(--ease);
}

.page-products .pf-toc__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--cyan-400);
  transition: width 0.26s var(--ease);
}

.page-products .pf-toc__list a:hover,
.page-products .pf-toc__list a:focus-visible {
  color: var(--mist-050);
}

.page-products .pf-toc__list a:hover::after,
.page-products .pf-toc__list a:focus-visible::after {
  width: 100%;
}

/* ---------- 通用段首 ---------- */

.page-products .pf-lede {
  max-width: 40em;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-products .pf-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

.page-products .pf-figure__frame {
  background:
    linear-gradient(180deg, rgba(6, 43, 51, 0.42), rgba(6, 11, 24, 0.7)),
    var(--ink-800);
  border: 1px solid var(--pf-line);
}

.page-products .pf-figure--band .pf-figure__frame {
  background:
    linear-gradient(120deg, rgba(6, 43, 51, 0.55), rgba(11, 18, 38, 0.85) 60%, rgba(138, 107, 255, 0.14)),
    var(--ink-800);
}

.page-products .pf-figure--grid .pf-figure__frame {
  background:
    linear-gradient(180deg, rgba(11, 18, 38, 0.8), rgba(6, 43, 51, 0.45)),
    var(--ink-800);
}

.page-products .pf-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 四块内容速览 ---------- */

.page-products .pf-quad {
  list-style: none;
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--pf-line-faint);
  border-top: 1px solid var(--pf-line-soft);
  border-bottom: 1px solid var(--pf-line-soft);
}

.page-products .pf-quad__item {
  padding: clamp(22px, 3vw, 34px) clamp(18px, 2.6vw, 30px);
  background: var(--ink-900);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-products .pf-quad__item:hover {
  background: var(--ink-800);
  transform: translateY(-2px);
}

.page-products .pf-quad__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan-400);
}

.page-products .pf-quad__title {
  margin: 10px 0 6px;
  font-size: 20px;
  font-weight: 500;
  color: var(--mist-050);
}

.page-products .pf-quad__meta {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gold-400);
}

.page-products .pf-quad__body {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate-400);
}

.page-products .pf-quad__when {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--pf-line-faint);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--cyan-700);
}

/* ---------- 比例计算 ---------- */

.page-products .pf-ratio__layout {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-products .pf-ratio__figure {
  margin: 0;
}

.page-products .pf-steps {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  counter-reset: pf-step;
}

.page-products .pf-steps__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 14px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-top: 1px solid var(--pf-line-soft);
}

.page-products .pf-steps__item:last-child {
  border-bottom: 1px solid var(--pf-line-soft);
}

.page-products .pf-steps__no {
  grid-row: span 2;
  margin: 2px 0 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold-400);
}

.page-products .pf-steps__title {
  margin: 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--mist-050);
}

.page-products .pf-steps__body {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate-400);
}

.page-products .pf-ladder {
  margin-top: clamp(36px, 6vw, 62px);
  border-top: 1px solid var(--pf-line);
  padding-top: clamp(20px, 3vw, 28px);
}

.page-products .pf-ladder__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-products .pf-ladder__title {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 400;
  color: var(--mist-050);
}

.page-products .pf-ladder__hint {
  margin: 0;
  max-width: 44em;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-products .pf-ladder__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .pf-ladder__row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 13px 6px;
  border-bottom: 1px solid var(--pf-line-faint);
  transition: background 0.18s var(--ease);
}

.page-products .pf-ladder__row:hover {
  background: var(--pf-cyan-soft);
}

.page-products .pf-ladder__pct {
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--gold-400);
}

.page-products .pf-ladder__calc {
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--mist-050);
}

.page-products .pf-ladder__note {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ---------- 对照长表 ---------- */

.page-products .pf-tablewrap {
  margin-top: clamp(24px, 4vw, 38px);
  max-height: min(78vh, 760px);
  overflow: auto;
  border-top: 1px solid var(--pf-line);
  border-bottom: 1px solid var(--pf-line);
  scrollbar-width: thin;
  scrollbar-color: var(--cyan-700) transparent;
}

.page-products .pf-tablewrap:focus-visible {
  outline: 1px solid var(--cyan-400);
  outline-offset: 3px;
}

.page-products .pf-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-products .pf-table thead th {
  position: sticky;
  top: 0;
  z-index: 3;
  padding: 12px 14px;
  background: var(--ink-800);
  color: var(--slate-400);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-align: left;
  border-bottom: 1px solid var(--cyan-700);
  box-shadow: 0 8px 14px -10px rgba(56, 232, 255, 0.35);
}

.page-products .pf-table tbody td,
.page-products .pf-table tbody th {
  padding: 9px 14px;
  text-align: left;
  font-weight: 400;
  font-size: 14.5px;
  color: var(--mist-050);
  border-bottom: 1px solid var(--pf-line-faint);
  transition: background 0.16s var(--ease);
}

.page-products .pf-table tbody tr:hover td,
.page-products .pf-table tbody tr:hover th {
  background: var(--pf-cyan-soft);
}

.page-products .pf-table tbody td.num {
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}

.page-products .pf-table tbody td:nth-child(2) {
  color: var(--gold-400);
}

.page-products .pf-table tr.pf-group th {
  padding: 11px 14px;
  text-align: left;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--cyan-400);
  background: rgba(6, 43, 51, 0.6);
  border-top: 1px solid var(--pf-line);
  border-bottom: 1px solid var(--pf-line);
}

.page-products .pf-table tr.pf-group:hover th {
  background: rgba(6, 43, 51, 0.6);
}

.page-products .pf-cycles__note {
  margin-top: 18px;
  max-width: 46em;
}

/* ---------- 四类桌台 ---------- */

.page-products .pf-tables__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(24px, 4vw, 38px);
  background: var(--pf-line-faint);
  border-top: 1px solid var(--pf-line-soft);
  border-bottom: 1px solid var(--pf-line-soft);
}

.page-products .pf-table-item {
  padding: clamp(20px, 3vw, 30px) clamp(18px, 2.6vw, 28px);
  background: var(--ink-900);
  transition: background 0.2s var(--ease);
}

.page-products .pf-table-item:hover {
  background: var(--ink-800);
}

.page-products .pf-table-item__no {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--violet-500);
}

.page-products .pf-table-item__title {
  margin: 10px 0 14px;
  font-size: 20px;
  font-weight: 500;
  color: var(--mist-050);
}

.page-products .pf-table-item__line {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate-400);
}

.page-products .pf-table-item__line:last-child {
  margin-bottom: 0;
}

.page-products .pf-table-item__label {
  display: block;
  margin-bottom: 4px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan-400);
}

.page-products .pf-table-item__line + .pf-table-item__line .pf-table-item__label {
  color: var(--coral-500);
}

/* ---------- 分类索引 ---------- */

.page-products .pf-cat-grid {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-products .pf-cat {
  border-top: 1px solid var(--pf-line);
  padding-top: 14px;
}

.page-products .pf-cat__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.page-products .pf-cat__no {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
}

.page-products .pf-cat__name {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--mist-050);
}

.page-products .pf-cat__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .pf-cat__list li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 10px;
  padding: 6px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--slate-400);
  border-bottom: 1px solid var(--pf-line-faint);
}

.page-products .pf-cat__list li:last-child {
  border-bottom: 0;
}

.page-products .pf-cat__code {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-700);
}

/* ---------- 更新与引用 ---------- */

.page-products .pf-updates__layout {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  margin-top: clamp(22px, 3vw, 32px);
}

.page-products .pf-cadence {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-products .pf-cadence__item {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 4px 16px;
  align-items: start;
  padding: 15px 0;
  border-top: 1px solid var(--pf-line-soft);
}

.page-products .pf-cadence__item:last-child {
  border-bottom: 1px solid var(--pf-line-soft);
}

.page-products .pf-cadence__when {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan-400);
}

.page-products .pf-cadence__item:last-child .pf-cadence__when {
  color: var(--gold-400);
}

.page-products .pf-cadence__what {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate-400);
}

.page-products .pf-ref {
  margin-top: clamp(26px, 4vw, 38px);
  padding: clamp(18px, 2.6vw, 26px);
  border-left: 1px solid var(--cyan-700);
  background: linear-gradient(90deg, rgba(6, 43, 51, 0.42), rgba(6, 11, 24, 0));
}

.page-products .pf-ref__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--mist-050);
}

.page-products .pf-ref__body {
  margin: 0;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate-400);
}

.page-products .pf-next {
  border-top: 1px solid var(--pf-line);
  padding-top: 16px;
}

.page-products .pf-next__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--slate-400);
}

.page-products .pf-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .pf-next__list a {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 12px 0;
  text-decoration: none;
  border-bottom: 1px solid var(--pf-line-faint);
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-products .pf-next__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--cyan-400);
  transition: width 0.26s var(--ease);
}

.page-products .pf-next__list a:hover::after,
.page-products .pf-next__list a:focus-visible::after {
  width: 100%;
}

.page-products .pf-next__label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-products .pf-next__go {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-products .pf-next__list a:hover .pf-next__label,
.page-products .pf-next__list a:focus-visible .pf-next__label {
  color: var(--mist-050);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-products .pf-quad {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-products .pf-ladder__row {
    grid-template-columns: 92px 250px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-products .pf-ladder__note {
    grid-column: 3;
  }
}

@media (min-width: 900px) {
  .page-products .pf-hero__cols {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: clamp(40px, 6vw, 72px);
  }

  .page-products .pf-ratio__layout {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }

  .page-products .pf-ratio__figure {
    position: sticky;
    top: 92px;
  }

  .page-products .pf-updates__layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-products .pf-cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .pf-table {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pf-quad__item,
  .page-products .pf-ladder__row,
  .page-products .pf-table-item,
  .page-products .pf-toc__list a::after,
  .page-products .pf-next__list a::after {
    transition: none;
  }
}
<<<END>>>