.page-products {
  --pr-side: 13.5rem;
  --pr-cut: clamp(26px, 5vw, 56px);
  --pr-gap: clamp(1.75rem, 4.5vw, 3.5rem);
}

/* ---------- 首屏 ---------- */
.page-products .pr-hero {
  position: relative;
  background: var(--deep);
  color: var(--paper);
  padding-block: clamp(1.75rem, 5vw, 3.5rem) calc(clamp(2.25rem, 6vw, 4rem) + var(--pr-cut));
  overflow: hidden;
}

.page-products .pr-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: var(--pr-cut);
  background: var(--paper);
  clip-path: polygon(0 100%, 100% 34%, 100% 100%);
}

.page-products .pr-hero__in {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-products .pr-hero__kick {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-products .pr-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 6.2vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: -0.012em;
  font-weight: 700;
  margin: 0.6rem 0 0;
}

.page-products .pr-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 36em;
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-products .pr-hero__aside {
  align-self: end;
}

.page-products .pr-hero__aside-t {
  margin: 0 0 0.55rem;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--paper-dim);
  border-bottom: 1px solid var(--paper-line);
  padding-bottom: 0.5rem;
}

.page-products .pr-hero__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .pr-hero__list li {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.5rem 0;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--paper-line);
}

.page-products .pr-hero__list li:last-child {
  border-bottom: 0;
}

.page-products .pr-hero__list .mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--orange);
}

@media (min-width: 56rem) {
  .page-products .pr-hero__in {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- 主体分栏 ---------- */
.page-products .pr-body {
  display: grid;
  gap: var(--pr-gap);
  padding-block: clamp(1.75rem, 4.5vw, 3rem) clamp(2.5rem, 6vw, 5rem);
}

@media (min-width: 62rem) {
  .page-products .pr-body {
    grid-template-columns: var(--pr-side) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-products .pr-side {
    position: sticky;
    top: 5.5rem;
    align-self: start;
    max-height: calc(100vh - 7rem);
    overflow-y: auto;
  }
}

/* ---------- 左栏索引 ---------- */
.page-products .pr-side {
  border-top: 3px solid var(--blue);
  padding-top: 0.9rem;
}

.page-products .pr-index__title {
  margin: 0 0 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--brick);
}

.page-products .pr-index,
.page-products .pr-index__sub {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .pr-index > li {
  border-bottom: 1px solid var(--hair);
}

.page-products .pr-index > li > a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.55rem 0 0.5rem;
  font-size: 0.92rem;
  color: var(--ink);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-products .pr-index > li > a:hover,
.page-products .pr-index > li > a:focus-visible {
  color: var(--blue);
}

.page-products .pr-index .toc-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--brick);
}

.page-products .pr-index > li > a:hover .toc-num {
  color: var(--blue);
}

.page-products .pr-index__sub {
  padding: 0 0 0.6rem 1.5rem;
}

.page-products .pr-index__sub a {
  display: block;
  padding: 0.2rem 0;
  font-size: 0.82rem;
  color: var(--brick);
  text-decoration: none;
}

.page-products .pr-index__sub a:hover,
.page-products .pr-index__sub a:focus-visible {
  color: var(--blue);
}

.page-products .pr-status {
  margin-top: 1.4rem;
  border: 1px solid var(--hair);
  border-left: 3px solid var(--bronze);
  padding: 0.8rem 0.9rem;
}

.page-products .pr-status__t {
  margin: 0 0 0.45rem;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--bronze);
}

.page-products .pr-status__row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--ink);
}

.page-products .pr-status__meta {
  margin: 0.45rem 0 0;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--brick);
}

/* ---------- 章节通用 ---------- */
.page-products .pr-sec {
  scroll-margin-top: 6rem;
  margin-bottom: clamp(2.75rem, 7vw, 5rem);
}

.page-products .pr-sec:last-of-type {
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-products .pr-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(0.8rem, 2.5vw, 1.5rem);
  align-items: start;
  padding-bottom: 1rem;
  border-bottom: 3px solid var(--brick);
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-products .pr-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1;
  letter-spacing: 0.12em;
  color: var(--blue);
  border: 1px solid var(--hair);
  padding: 0.32rem 0.5rem;
  background: var(--paper);
}

.page-products .pr-sec__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.2vw, 2.15rem);
  line-height: 1.16;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.page-products .pr-sec__lede {
  margin: 0.7rem 0 0;
  max-width: 44em;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--brick);
}

/* ---------- 品类 ---------- */
.page-products .pr-cat {
  scroll-margin-top: 6rem;
  margin-bottom: clamp(2.25rem, 5vw, 3.5rem);
}

.page-products .pr-cat:last-child {
  margin-bottom: 0;
}

.page-products .pr-cat__band {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  width: 100%;
  padding: 0.7rem 2.5rem 0.7rem 1rem;
  background: var(--brick);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, calc(100% - 2.25rem) 100%, 0 100%);
  margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
}

.page-products .pr-cat__code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-products .pr-cat__band h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.2vw, 1.42rem);
  letter-spacing: 0.01em;
}

.page-products .pr-cat__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-products .pr-cat__copy {
  order: 1;
}

.page-products .pr-cat__media,
.page-products .pr-cat .pr-fig {
  order: 2;
}

.page-products .pr-cat__copy > p {
  margin: 0 0 1rem;
  font-size: 0.97rem;
  line-height: 1.88;
  color: var(--ink);
}

@media (min-width: 48rem) {
  .page-products .pr-cat__band {
    width: fit-content;
    min-width: 46%;
  }

  .page-products .pr-cat__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: start;
  }

  .page-products .pr-cat:nth-of-type(even) .pr-cat__copy {
    order: 2;
  }

  .page-products .pr-cat:nth-of-type(even) .pr-fig,
  .page-products .pr-cat:nth-of-type(even) .pr-cat__note {
    order: 1;
  }
}

/* ---------- 规格表 ---------- */
.page-products .pr-spec {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-products .pr-spec li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: baseline;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--hair);
}

.page-products .pr-spec__k {
  font-size: 0.86rem;
  color: var(--brick);
}

.page-products .pr-spec__v {
  font-family: var(--font-mono);
  font-size: clamp(1.02rem, 1.9vw, 1.3rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-align: right;
  line-height: 1.3;
}

.page-products .pr-spec__v em {
  font-style: normal;
  font-size: 0.62em;
  letter-spacing: 0.06em;
  color: var(--bronze);
  margin-left: 0.16em;
}

/* ---------- 剖面示意图 ---------- */
.page-products .pr-detail {
  display: block;
  width: 100%;
  height: auto;
  max-width: 24rem;
  margin-top: 1.2rem;
  color: var(--brick);
  border: 1px solid var(--hair);
  background: linear-gradient(180deg, rgba(46, 110, 96, 0.05), transparent 60%);
}

/* ---------- 图片 ---------- */
.page-products .pr-fig {
  margin: 0;
}

.page-products .pr-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--hair);
  background: var(--hair);
}

.page-products .pr-fig--fence img,
.page-products .pr-fig--install img {
  aspect-ratio: 4 / 3;
}

.page-products .pr-fig--wide img {
  aspect-ratio: 16 / 9;
}

.page-products .pr-fig__cap {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--brick);
}

/* ---------- 配套器材的组合说明 ---------- */
.page-products .pr-cat__note {
  border: 1px solid var(--hair);
  border-top: 3px solid var(--orange);
  padding: clamp(1rem, 2.5vw, 1.4rem);
  background: rgba(245, 240, 230, 0.6);
}

.page-products .pr-cat__note-t {
  margin: 0 0 0.7rem;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--brick);
}

.page-products .pr-cat__note ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .pr-cat__note li {
  padding: 0.5rem 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink);
  border-bottom: 1px solid var(--hair);
}

.page-products .pr-cat__note li:last-child {
  border-bottom: 0;
}

/* ---------- 检测 ---------- */
.page-products .pr-test {
  display: grid;
  gap: clamp(1.4rem, 3.5vw, 2.5rem);
}

.page-products .pr-test__intro {
  margin: 0 0 1.3rem;
  font-size: 0.97rem;
  line-height: 1.88;
  color: var(--ink);
}

.page-products .pr-metric {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-products .pr-metric > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(0.8rem, 2vw, 1.4rem);
  padding: 1rem 0;
  border-bottom: 1px solid var(--hair);
}

.page-products .pr-metric__n {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--bronze);
  padding-top: 0.3rem;
}

.page-products .pr-metric h3 {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.9vw, 1.2rem);
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-products .pr-metric p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--brick);
}

.page-products .pr-test__side {
  border: 1px solid var(--hair);
  border-top: 3px solid var(--bronze);
  padding: clamp(1rem, 2.5vw, 1.5rem);
  background: linear-gradient(180deg, rgba(46, 110, 96, 0.07), transparent 55%);
  align-self: start;
}

.page-products .pr-test__side-t {
  margin: 0.75rem 0 0.6rem;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--bronze);
}

.page-products .pr-test__side p {
  margin: 0 0 0.8rem;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-products .pr-test__side-note {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--brick);
  padding-top: 0.8rem;
  border-top: 1px solid var(--hair);
}

@media (min-width: 56rem) {
  .page-products .pr-test {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  }
}

/* ---------- 深化设计流程 ---------- */
.page-products .pr-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.page-products .pr-flow > li {
  position: relative;
  padding: 0 0 clamp(1.25rem, 3vw, 1.8rem) clamp(2rem, 5vw, 3.25rem);
  border-left: 1px solid var(--hair);
  margin-left: 0.7rem;
}

.page-products .pr-flow > li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-products .pr-flow__n {
  position: absolute;
  left: -0.7rem;
  top: 0;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--paper);
  background: var(--blue);
  padding: 0.28rem 0.38rem;
  line-height: 1;
}

.page-products .pr-flow h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-products .pr-flow p {
  margin: 0 0 0.5rem;
  max-width: 40em;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-products .pr-flow__out {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--bronze);
}

/* ---------- 数据块 ---------- */
.page-products .pr-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border-block: 1px solid var(--hair);
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-products .pr-figures__item {
  background: var(--paper);
  padding: clamp(0.9rem, 2.5vw, 1.4rem);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-products .pr-figures__v {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.2vw, 2.45rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--blue);
}

.page-products .pr-figures__u {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--bronze);
}

.page-products .pr-figures__l {
  margin-top: 0.25rem;
  font-size: 0.84rem;
  color: var(--brick);
}

@media (min-width: 48rem) {
  .page-products .pr-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 供货说明 ---------- */
.page-products .pr-supply {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-products .pr-supply__copy p {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
  line-height: 1.88;
  color: var(--ink);
}

.page-products .pr-supply__copy p:last-child {
  margin-bottom: 0;
}

@media (min-width: 56rem) {
  .page-products .pr-supply {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 安装记录手风琴 ---------- */
.page-products .pr-steps {
  margin-bottom: clamp(1.5rem, 4vw, 2.25rem);
}

.page-products .pr-step {
  border: 1px solid var(--hair);
  border-left: 3px solid var(--hair);
  margin-bottom: 0.5rem;
  background: var(--paper);
  transition: border-color var(--dur) var(--ease);
}

.page-products .pr-step[open] {
  border-left-color: var(--blue);
}

.page-products .pr-step summary {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
}

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

.page-products .pr-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--blue);
}

.page-products .pr-step[open] summary::after {
  content: "–";
}

.page-products .pr-step__n {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--brick);
}

.page-products .pr-step[open] .pr-step__n {
  color: var(--blue);
}

.page-products .pr-step__body {
  padding: 0 1rem 1rem 1rem;
}

.page-products .pr-step__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--brick);
}

/* ---------- 安装交付 ---------- */
.page-products .pr-install {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-products .pr-install__copy p {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
  line-height: 1.88;
  color: var(--ink);
}

.page-products .pr-install__copy p:last-child {
  margin-bottom: 0;
}

@media (min-width: 56rem) {
  .page-products .pr-install {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 维保改造 ---------- */
.page-products .pr-serv {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
  display: grid;
  gap: clamp(1rem, 2.5vw, 1.6rem);
}

.page-products .pr-serv > li {
  border-top: 3px solid var(--blue);
  padding-top: 0.9rem;
}

.page-products .pr-serv h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-products .pr-serv p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--brick);
}

.page-products .pr-serv__note {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--ink);
  border-left: 3px solid var(--lime);
  padding-left: 0.9rem;
}

@media (min-width: 48rem) {
  .page-products .pr-serv {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 收尾行动区 ---------- */
.page-products .pr-cta {
  background: var(--deep);
  color: var(--paper);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  clip-path: polygon(0 clamp(14px, 3vw, 34px), 100% 0, 100% 100%, 0 100%);
  margin-top: clamp(1rem, 3vw, 2rem);
}

.page-products .pr-cta__in {
  max-width: 42em;
}

.page-products .pr-cta__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-products .pr-cta h2 {
  margin: 0.7rem 0 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2.2rem);
  line-height: 1.18;
  letter-spacing: -0.005em;
}

.page-products .pr-cta p {
  margin: 0 0 1.5rem;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--paper-dim);
  max-width: 40em;
}

.page-products .pr-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 30rem) {
  .page-products .pr-spec li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.15rem;
  }

  .page-products .pr-spec__v {
    text-align: left;
  }

  .page-products .pr-cat__band {
    padding-right: 1.75rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-products .pr-step,
  .page-products .pr-index > li > a {
    transition: none;
  }
}
<<<END>>>