.page-products {
  --pf-gap: clamp(16px, 2.6vw, 30px);
  --pf-rule: 1px solid rgba(14, 42, 71, .16);
  --pf-dash: 1px dashed rgba(14, 42, 71, .22);
  background: var(--paper);
  color: var(--char);
  padding-block: clamp(18px, 3.4vw, 36px) clamp(52px, 8vw, 96px);
  overflow-x: clip;
}

.page-products .pf-wrap {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-products .pf-crumb {
  margin-bottom: clamp(16px, 2.6vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-products .pf-hero {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-hero__panel {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(22px, 4vw, 46px);
  border-left: 6px solid var(--signal);
  box-shadow: var(--shadow-paper);
}

.page-products .pf-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--teal);
}

.page-products .pf-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-products .pf-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(.96rem, 1.6vw, 1.06rem);
  line-height: 1.78;
  color: rgba(247, 244, 236, .84);
}

.page-products .pf-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-products .pf-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(247, 244, 236, .22);
}

.page-products .pf-fact dt {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: rgba(247, 244, 236, .6);
  margin-bottom: 4px;
}

.page-products .pf-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.02rem, 2.2vw, 1.3rem);
  font-weight: 700;
  color: var(--mist);
}

.page-products .pf-hero__figure {
  margin: 0;
  padding: 10px;
  background: var(--mist);
  border: var(--pf-rule);
  box-shadow: var(--shadow-paper);
}

.page-products .pf-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  background: var(--paper);
}

.page-products .pf-hero__figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: rgba(8, 26, 46, .66);
}

/* ---------- 本页目录 ---------- */
.page-products .pf-toc {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  margin-top: clamp(24px, 4vw, 42px);
  padding-block: 12px;
  border-top: 2px solid var(--ink);
  border-bottom: var(--pf-rule);
}

.page-products .pf-toc__label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--archive);
}

.page-products .pf-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pf-toc__list a {
  font-size: .9rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

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

/* ---------- 章节通用 ---------- */
.page-products .pf-section {
  padding-block: clamp(36px, 5.6vw, 68px);
}

.page-products .pf-section + .pf-section {
  border-top: var(--pf-rule);
}

.page-products .pf-section__head {
  max-width: 62ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-products .pf-section__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--archive);
}

.page-products .pf-section__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-products .pf-section__lead {
  margin: 0;
  font-size: clamp(.94rem, 1.5vw, 1.02rem);
  line-height: 1.78;
  color: rgba(27, 31, 36, .8);
}

/* ---------- 服务节点图 ---------- */
.page-products .pf-map__board {
  position: relative;
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-map__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.page-products .pf-map__nodes {
  display: grid;
  gap: 10px;
}

.page-products .pf-node {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 2px 14px;
  padding: 14px 16px;
  background: var(--paper);
  border: var(--pf-rule);
  border-left: 4px solid var(--fog);
  color: var(--ink);
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}

.page-products .pf-node:hover {
  transform: translateX(2px);
  border-left-color: var(--teal);
}

.page-products .pf-node__num {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 700;
  opacity: .55;
}

.page-products .pf-node__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.02rem;
  letter-spacing: .01em;
}

.page-products .pf-node__hint {
  grid-column: 2;
  font-size: .8rem;
  line-height: 1.5;
  opacity: .62;
}

.page-products #pf-svc-1:checked ~ .pf-map__nodes .pf-node[for="pf-svc-1"],
.page-products #pf-svc-2:checked ~ .pf-map__nodes .pf-node[for="pf-svc-2"],
.page-products #pf-svc-3:checked ~ .pf-map__nodes .pf-node[for="pf-svc-3"],
.page-products #pf-svc-4:checked ~ .pf-map__nodes .pf-node[for="pf-svc-4"],
.page-products #pf-svc-5:checked ~ .pf-map__nodes .pf-node[for="pf-svc-5"] {
  background: var(--ink);
  color: var(--paper);
  border-left-color: var(--signal);
}

.page-products .pf-map__panels {
  min-height: 100%;
}

.page-products .pf-panel {
  display: none;
  background: var(--mist);
  border: var(--pf-rule);
  border-top: 4px solid var(--ink);
  padding: clamp(18px, 3vw, 32px);
  height: 100%;
}

.page-products .pf-panel h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.08rem, 2.1vw, 1.34rem);
  line-height: 1.36;
  color: var(--ink);
}

.page-products .pf-panel p {
  margin: 0 0 12px;
  font-size: .96rem;
  line-height: 1.78;
  color: rgba(27, 31, 36, .84);
}

.page-products .pf-panel__use {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  align-items: baseline;
  padding-top: 12px;
  border-top: var(--pf-dash);
  font-size: .88rem !important;
}

.page-products .pf-panel__use span {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--archive);
}

.page-products .pf-panel__link {
  margin: 0 !important;
}

.page-products .pf-panel__link a {
  font-weight: 700;
  font-size: .92rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--signal);
}

.page-products .pf-panel__link a:hover,
.page-products .pf-panel__link a:focus-visible {
  color: var(--signal);
}

.page-products #pf-svc-1:checked ~ .pf-map__panels .pf-panel[data-svc="1"],
.page-products #pf-svc-2:checked ~ .pf-map__panels .pf-panel[data-svc="2"],
.page-products #pf-svc-3:checked ~ .pf-map__panels .pf-panel[data-svc="3"],
.page-products #pf-svc-4:checked ~ .pf-map__panels .pf-panel[data-svc="4"],
.page-products #pf-svc-5:checked ~ .pf-map__panels .pf-panel[data-svc="5"] {
  display: block;
}

/* ---------- 三步绑定 ---------- */
.page-products .pf-binding__grid {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-steps {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-products .pf-step {
  background: var(--paper);
  border: var(--pf-rule);
  border-left: 4px solid var(--fog);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-products .pf-step[open] {
  background: #FFFFFF;
  border-left-color: var(--signal);
}

.page-products .pf-step summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 4px 14px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-products .pf-step summary::-webkit-details-marker {
  display: none;
}

.page-products .pf-step__num {
  grid-row: span 2;
  display: inline-grid;
  place-items: center;
  min-width: 36px;
  height: 36px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .9rem;
  font-weight: 700;
}

.page-products .pf-step__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.02rem;
  color: var(--ink);
}

.page-products .pf-step__meta {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: rgba(27, 31, 36, .6);
}

.page-products .pf-step__body {
  padding: 4px 16px 18px;
  border-top: var(--pf-dash);
  margin-top: 2px;
}

.page-products .pf-step__body p {
  margin: 12px 0 0;
  font-size: .94rem;
  line-height: 1.76;
  color: rgba(27, 31, 36, .82);
}

.page-products .pf-step__tip {
  padding-left: 12px;
  border-left: 2px solid var(--mist);
  color: rgba(27, 31, 36, .68) !important;
  font-size: .88rem !important;
}

.page-products .pf-binding__figure {
  margin: 0;
  padding: 10px;
  background: var(--ink);
  border: var(--pf-rule);
  box-shadow: var(--shadow-paper);
}

.page-products .pf-binding__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 13;
  object-fit: cover;
  background: var(--mist);
}

.page-products .pf-binding__figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: rgba(217, 240, 236, .8);
}

.page-products .pf-binding__cta {
  margin: clamp(18px, 3vw, 28px) 0 0;
}

/* ---------- 2.3 版结构 ---------- */
.page-products .pf-navstruct__grid {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-navstruct__figure {
  margin: 0;
  padding: 10px;
  background: var(--mist);
  border: var(--pf-rule);
  box-shadow: var(--shadow-paper);
}

.page-products .pf-navstruct__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 8;
  object-fit: cover;
  background: var(--paper);
}

.page-products .pf-navstruct__figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: rgba(8, 26, 46, .66);
}

.page-products .pf-blocks {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: start;
}

.page-products .pf-block {
  background: var(--paper);
  border: var(--pf-rule);
  border-left: 4px solid var(--ink);
  padding: 16px 18px;
  transition: border-left-color .2s var(--ease), transform .2s var(--ease);
}

.page-products .pf-block:hover {
  border-left-color: var(--teal);
  transform: translateX(2px);
}

.page-products .pf-block__k {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--archive);
}

.page-products .pf-block h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.04rem;
  line-height: 1.4;
  color: var(--ink);
}

.page-products .pf-block p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.74;
  color: rgba(27, 31, 36, .8);
}

.page-products .pf-navstruct__note {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 14px 18px;
  background: var(--mist);
  border-left: 4px solid var(--teal);
  font-size: .9rem;
  line-height: 1.76;
  color: rgba(8, 26, 46, .84);
}

/* ---------- 反馈与导出 ---------- */
.page-products .pf-feedback__grid {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-fb {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: var(--pf-rule);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: var(--shadow-paper);
}

.page-products .pf-fb--export {
  background: var(--mist);
}

.page-products .pf-fb__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.06rem, 2vw, 1.26rem);
  line-height: 1.36;
  color: var(--ink);
}

.page-products .pf-fb__lead {
  margin: 0;
  font-size: .94rem;
  line-height: 1.78;
  color: rgba(27, 31, 36, .82);
}

.page-products .pf-fb__types {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .pf-fb__types li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: var(--pf-dash);
  font-size: .9rem;
  line-height: 1.7;
  color: rgba(27, 31, 36, .82);
}

.page-products .pf-fb__figure {
  margin: 18px 0 0;
  padding: 8px;
  background: #FFFFFF;
  border: var(--pf-rule);
}

.page-products .pf-fb__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-products .pf-fb__figure figcaption {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: rgba(8, 26, 46, .62);
}

.page-products .pf-fb__link {
  margin: 14px 0 0;
}

.page-products .pf-fb__link a {
  font-weight: 700;
  font-size: .92rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--signal);
}

.page-products .pf-fb__link a:hover,
.page-products .pf-fb__link a:focus-visible {
  color: var(--signal);
}

.page-products .pf-export {
  position: relative;
  margin-top: 18px;
  background: var(--paper);
  border: var(--pf-rule);
}

.page-products .pf-export__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.page-products .pf-export__tabs {
  display: flex;
  border-bottom: var(--pf-rule);
}

.page-products .pf-export__tab {
  flex: 1 1 0;
  padding: 12px 8px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .02em;
  color: rgba(8, 26, 46, .62);
  background: var(--fog);
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: color .2s var(--ease), background-color .2s var(--ease),
              border-color .2s var(--ease);
}

.page-products .pf-export__tab:hover {
  color: var(--ink);
}

.page-products #pf-exp-csv:checked ~ .pf-export__tabs .pf-export__tab[for="pf-exp-csv"],
.page-products #pf-exp-bookmark:checked ~ .pf-export__tabs .pf-export__tab[for="pf-exp-bookmark"] {
  background: var(--paper);
  color: var(--ink);
  border-bottom-color: var(--teal);
}

.page-products .pf-export__panel {
  display: none;
  padding: 16px 16px 18px;
}

.page-products #pf-exp-csv:checked ~ .pf-export__panels .pf-export__panel[data-exp="csv"],
.page-products #pf-exp-bookmark:checked ~ .pf-export__panels .pf-export__panel[data-exp="bookmark"] {
  display: block;
}

.page-products .pf-export__panel p {
  margin: 0 0 8px;
  font-size: .92rem;
  line-height: 1.76;
  color: rgba(27, 31, 36, .82);
}

.page-products .pf-export__meta {
  margin: 0 !important;
  font-family: var(--font-mono);
  font-size: .74rem !important;
  letter-spacing: .04em;
  color: rgba(8, 26, 46, .6) !important;
}

/* ---------- 适用场景 ---------- */
.page-products .pf-scenes__list {
  display: grid;
  gap: var(--pf-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pf-scene {
  position: relative;
  background: var(--paper);
  border: var(--pf-rule);
  border-top: 4px solid var(--ink);
  padding: 18px;
  transition: transform .2s var(--ease), border-top-color .2s var(--ease);
}

.page-products .pf-scene:hover {
  transform: translateY(-2px);
  border-top-color: var(--signal);
}

.page-products .pf-scene__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--archive);
}

.page-products .pf-scene h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--ink);
}

.page-products .pf-scene p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.74;
  color: rgba(27, 31, 36, .8);
}

/* ---------- 服务保障 ---------- */
.page-products .pf-support {
  padding-block: 0;
  border-top: 0 !important;
  margin-top: clamp(14px, 2.4vw, 24px);
}

.page-products .pf-support__inner {
  position: relative;
  background: var(--ink-deep);
  color: var(--paper);
  padding: clamp(24px, 4.4vw, 52px);
  border-left: 6px solid var(--teal);
}

.page-products .pf-support__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--teal);
}

.page-products .pf-support__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  line-height: 1.2;
  color: var(--paper);
}

.page-products .pf-support__lead {
  margin: 0;
  max-width: 56ch;
  font-size: .96rem;
  line-height: 1.78;
  color: rgba(247, 244, 236, .78);
}

.page-products .pf-support__list {
  display: grid;
  gap: 14px;
  margin: clamp(20px, 3.4vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-products .pf-support__list li {
  padding: 14px 0 0;
  border-top: 1px solid rgba(247, 244, 236, .18);
}

.page-products .pf-support__k {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: rgba(217, 240, 236, .66);
}

.page-products .pf-support__v {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(1.02rem, 2.2vw, 1.24rem);
  font-weight: 700;
  color: var(--mist);
}

.page-products .pf-support__d {
  margin: 0;
  font-size: .88rem;
  line-height: 1.7;
  color: rgba(247, 244, 236, .7);
}

.page-products .pf-support__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin: clamp(22px, 3.4vw, 32px) 0 0;
}

.page-products .pf-support__link {
  font-size: .9rem;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 240, 236, .5);
}

.page-products .pf-support__link:hover,
.page-products .pf-support__link:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

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

  .page-products .pf-steps .pf-step:first-child {
    grid-column: 1 / -1;
  }

  .page-products .pf-support__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 28px;
  }
}

@media (min-width: 860px) {
  .page-products .pf-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .pf-binding__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

  .page-products .pf-steps .pf-step:first-child {
    grid-column: auto;
  }

  .page-products .pf-navstruct__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
  }

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

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

@media (min-width: 900px) {
  .page-products .pf-hero {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(20px, 3vw, 36px);
  }

  .page-products .pf-hero__figure {
    transform: translateY(26px);
  }

  .page-products .pf-map__board {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-products .pf-node {
    padding: 16px 18px;
  }

  .page-products .pf-support__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-products .pf-scenes__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .pf-scene:nth-child(even) {
    transform: translateY(16px);
  }

  .page-products .pf-scene:nth-child(even):hover {
    transform: translateY(14px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pf-node,
  .page-products .pf-block,
  .page-products .pf-scene,
  .page-products .pf-step,
  .page-products .pf-export__tab,
  .page-products .pf-toc__list a {
    transition: none;
  }

  .page-products .pf-node:hover,
  .page-products .pf-block:hover,
  .page-products .pf-scene:hover,
  .page-products .pf-scene:nth-child(even),
  .page-products .pf-scene:nth-child(even):hover,
  .page-products .pf-hero__figure {
    transform: none;
  }
}
<<<END>>>
```