.page-products {
  --pr-rail: 13.5rem;
  --pr-gap: clamp(1.75rem, 4vw, 3.75rem);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* 首屏 */
.page-products .pr-hero-band {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.1rem, 3vw, 1.9rem) clamp(2.6rem, 6vw, 4.6rem);
  background: linear-gradient(172deg, var(--paper-lift) 0%, var(--paper) 72%);
  border-bottom: 1px solid var(--line);
}

.page-products .pr-hero-band::before {
  content: "";
  position: absolute;
  inset-block: 0;
  left: clamp(1rem, 20vw, 24rem);
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line-strong), transparent);
}

.page-products .pr-hero-band::after {
  content: "";
  position: absolute;
  top: -10%;
  right: -2.5rem;
  width: 6rem;
  height: 120%;
  background: var(--ink-deep);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  opacity: .92;
}

.page-products .pr-hero {
  position: relative;
  z-index: 1;
  max-width: 38rem;
  padding-right: 3rem;
}

.page-products .pr-hero .page-title {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5.6vw, 3.6rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  margin: .7rem 0 1rem;
  color: var(--ink);
}

.page-products .pr-hero .page-lede {
  max-width: 34rem;
  font-size: clamp(1rem, 2.2vw, 1.1rem);
  line-height: 1.85;
  color: var(--ink-deep);
  margin: 0;
}

.page-products .pr-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.6rem;
}

.page-products .pr-hero__meta {
  margin: 1.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
  font-size: .82rem;
  letter-spacing: .02em;
  color: var(--slate);
}

/* 主体两栏 */
.page-products .pr-body {
  display: grid;
  gap: var(--pr-gap);
  padding-block: clamp(2rem, 5vw, 3.6rem) clamp(2.6rem, 6vw, 5rem);
}

/* 左轴索引 */
.page-products .pr-toc {
  border-top: 2px solid var(--ink);
  padding-top: .9rem;
  min-width: 0;
}

.page-products .pr-toc__label {
  margin: 0 0 .8rem;
  font-size: .74rem;
  letter-spacing: .22em;
  color: var(--slate);
}

.page-products .pr-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-products .pr-toc__list::-webkit-scrollbar {
  display: none;
}

.page-products .pr-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  padding: .42rem .72rem;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  white-space: nowrap;
  font-size: .88rem;
  text-decoration: none;
  color: var(--ink-deep);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-products .pr-toc__link:hover {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-products .pr-toc__num {
  font-family: var(--font-num);
  font-size: .72rem;
  color: var(--cinnabar);
}

/* 章节 */
.page-products .pr-flow {
  min-width: 0;
}

.page-products .pr-sec {
  padding-block: clamp(1.9rem, 4vw, 3rem);
  scroll-margin-top: 5rem;
}

.page-products .pr-sec + .pr-sec {
  border-top: 1px solid var(--line);
}

.page-products .pr-sec:first-child {
  padding-top: 0;
}

.page-products .pr-sec__head {
  display: flex;
  align-items: flex-start;
  gap: .9rem;
  margin-bottom: 1.1rem;
}

.page-products .pr-sec__no {
  font-family: var(--font-num);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--cinnabar);
  padding-top: .6rem;
  flex: none;
}

.page-products .pr-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  line-height: 1.32;
  color: var(--ink);
}

.page-products .pr-sec__lede {
  margin: 0;
  max-width: 40rem;
  font-size: .98rem;
  line-height: 1.85;
  color: var(--ink-deep);
}

/* 入口路径 */
.page-products .pr-route {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
}

.page-products .pr-route__item {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: .15rem .7rem;
  padding: .95rem 0 .95rem 1.1rem;
  border-left: 2px solid var(--mist);
  transition: border-color .3s var(--ease);
}

.page-products .pr-route__item + .pr-route__item {
  border-top: 1px solid var(--line-soft);
}

.page-products .pr-route__item:hover {
  border-left-color: var(--cinnabar);
}

.page-products .pr-route__no {
  font-family: var(--font-num);
  font-size: .76rem;
  color: var(--gold);
  padding-top: .38rem;
}

.page-products .pr-route__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 1.5;
  color: var(--ink);
}

.page-products .pr-route__text {
  grid-column: 2;
  margin: .25rem 0 0;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--ink-deep);
}

/* 离线包 */
.page-products .pr-offline {
  display: grid;
  gap: clamp(1.3rem, 3vw, 2.4rem);
  margin-top: 1.8rem;
}

.page-products .pr-figure {
  margin: 0;
  min-width: 0;
}

.page-products .pr-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-m);
}

.page-products .pr-figure--tall img {
  aspect-ratio: 8 / 11;
  clip-path: polygon(0 0, 100% 2.5%, 100% 100%, 0 97.5%);
}

.page-products .pr-figure__cap {
  margin-top: .65rem;
  font-size: .78rem;
  line-height: 1.6;
  color: var(--index-gray);
}

.page-products .pr-spec {
  margin: 0;
  padding: 0;
}

.page-products .pr-spec__row {
  display: grid;
  gap: .18rem;
  padding: .8rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-products .pr-spec__row:first-child {
  border-top: 1px solid var(--line);
}

.page-products .pr-spec dt {
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-products .pr-spec dd {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--ink);
}

/* 格式标签 */
.page-products .pr-formats {
  margin-top: 1.9rem;
}

.page-products .pr-formats__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0 0 1rem;
}

.page-products .pr-tab {
  font-size: .84rem;
  padding: .42rem .9rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  text-decoration: none;
  color: var(--ink-deep);
  transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.page-products .pr-tab:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--on-dark);
}

.page-products .pr-format {
  padding: 1rem 1.1rem;
  background: var(--paper-lift);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--mist);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-products .pr-format + .pr-format {
  margin-top: .75rem;
}

.page-products .pr-format:target {
  border-left-color: var(--cinnabar);
  box-shadow: var(--shadow-soft);
}

.page-products .pr-format__name {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .6rem;
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-size: 1.04rem;
  color: var(--ink);
}

.page-products .pr-format__name span {
  font-family: var(--font-num);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-products .pr-format p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--ink-deep);
}

/* 分类数字 */
.page-products .pr-counts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.2rem, 4vw, 3rem);
  margin: 1.8rem 0 1.6rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--line);
}

.page-products .pr-count {
  display: flex;
  flex-direction: column;
}

.page-products .pr-count__num {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8vw, 4.2rem);
  line-height: 1;
  color: var(--ink);
}

.page-products .pr-count--accent .pr-count__num {
  color: var(--cinnabar);
}

.page-products .pr-count__label {
  margin-top: .45rem;
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-products .pr-figure--wide img {
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-m) var(--radius-l) var(--radius-m) var(--radius-l);
}

/* 分类矩阵 */
.page-products .pr-matrix {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-products .pr-matrix__cell {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: .9rem .95rem;
  background: var(--paper-lift);
}

.page-products .pr-matrix__no {
  font-family: var(--font-num);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-products .pr-matrix__name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  color: var(--ink);
}

.page-products .pr-matrix__note {
  margin: 0;
  font-size: .8rem;
  line-height: 1.65;
  color: var(--slate);
}

/* 场景步骤 */
.page-products .pr-scenes {
  margin-top: 1.6rem;
}

.page-products .pr-scene {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: .35rem .9rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-products .pr-scene__no {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--gold);
}

.page-products .pr-scene__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 1.5;
  color: var(--ink);
}

.page-products .pr-scene__text {
  margin: .3rem 0 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--ink-deep);
}

.page-products .pr-scene__steps {
  grid-column: 2;
  list-style: none;
  margin: .6rem 0 0;
  padding: 0;
}

.page-products .pr-scene__steps li {
  position: relative;
  padding-left: 1.4rem;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--ink-deep);
}

.page-products .pr-scene__steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: .6rem;
  height: 1px;
  background: var(--cinnabar);
}

.page-products .pr-figure--aside {
  margin-top: 1.7rem;
}

.page-products .pr-figure--aside img {
  aspect-ratio: 9 / 7;
  border-radius: var(--radius-l) var(--radius-m) var(--radius-l) var(--radius-m);
}

/* 常见问题 */
.page-products .pr-ask {
  display: grid;
  gap: clamp(1.3rem, 3vw, 2.4rem);
  margin-top: 1.4rem;
}

.page-products .pr-faq {
  border-top: 1px solid var(--line);
}

.page-products .pr-faq__item {
  border-bottom: 1px solid var(--line-soft);
}

.page-products .pr-faq__q {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: .95rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-products .pr-faq__q::after {
  content: "+";
  font-family: var(--font-num);
  font-size: 1rem;
  color: var(--cinnabar);
}

.page-products .pr-faq__item[open] .pr-faq__q::after {
  content: "−";
}

.page-products .pr-faq__a {
  margin: 0 0 1rem;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--ink-deep);
}

.page-products .pr-ask__more {
  margin: 1.6rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
  font-size: .92rem;
  line-height: 1.85;
  color: var(--ink-deep);
}

/* 页尾横幅 */
.page-products .pr-banner {
  display: grid;
  gap: clamp(1.1rem, 3vw, 2rem);
  margin-block: clamp(1.8rem, 4vw, 3rem) clamp(2.4rem, 6vw, 4.6rem);
  padding: clamp(1.4rem, 3.4vw, 2.6rem);
  background: var(--ink-deep);
  color: var(--on-dark);
  border-radius: var(--radius-l);
  overflow: hidden;
}

.page-products .pr-banner__kicker {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-products .pr-banner h2 {
  margin: .6rem 0 .8rem;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.05rem);
  line-height: 1.34;
  color: var(--on-dark);
}

.page-products .pr-banner__text {
  margin: 0;
  max-width: 30rem;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--on-dark-dim);
}

.page-products .pr-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.4rem;
}

.page-products .pr-banner .btn--outline {
  color: var(--on-dark);
  border-color: var(--line-invert);
}

.page-products .pr-banner .btn--outline:hover {
  background: var(--on-dark);
  border-color: var(--on-dark);
  color: var(--ink);
}

.page-products .pr-banner__fig {
  margin: 0;
  min-width: 0;
}

.page-products .pr-banner__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-m);
  opacity: .92;
}

/* 断点 */
@media (min-width: 34rem) {
  .page-products .pr-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 46rem) {
  .page-products .pr-spec__row {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    gap: 1.4rem;
    align-items: baseline;
  }

  .page-products .pr-formats__tabs {
    flex-wrap: nowrap;
  }
}

@media (min-width: 52rem) {
  .page-products .pr-offline {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-products .pr-ask {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
  }

  .page-products .pr-scene {
    grid-template-columns: 2.6rem minmax(0, 1fr) minmax(0, 17rem);
    align-items: start;
    gap: .35rem 1.4rem;
  }

  .page-products .pr-scene__steps {
    grid-column: 3;
    margin-top: 0;
    padding-left: 1rem;
    border-left: 1px solid var(--line-soft);
  }

  .page-products .pr-figure--aside {
    max-width: 36rem;
    margin-left: auto;
    margin-top: 2rem;
  }

  .page-products .pr-banner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }
}

@media (min-width: 60rem) {
  .page-products .pr-matrix {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .pr-hero-band::after {
    width: min(30rem, 40%);
    right: -5rem;
  }

  .page-products .pr-hero {
    padding-right: 0;
  }
}

@media (min-width: 62rem) {
  .page-products .pr-body {
    grid-template-columns: var(--pr-rail) minmax(0, 1fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-products .pr-toc {
    position: sticky;
    top: 2rem;
  }

  .page-products .pr-toc__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-products .pr-toc__link {
    white-space: normal;
    border: 0;
    border-left: 1px solid var(--line);
    border-radius: 0;
    padding: .55rem 0 .55rem .9rem;
    transition: border-color .25s var(--ease), color .25s var(--ease);
  }

  .page-products .pr-toc__link:hover {
    border-left-color: var(--cinnabar);
  }
}
<<<END>>>