.page-products {
  --pp-rail: 0px;
  --pp-rail-gap: clamp(1.5rem, 4vw, 2.75rem);
  --pp-block: clamp(3.25rem, 8vw, 7rem);
  --pp-border: 3px solid var(--ink-900);
  position: relative;
  overflow-x: clip;
  background: var(--snow);
  color: var(--graphite);
  font-family: var(--font-sans);
  font-size: 1rem;
}

@media (min-width: 900px) {
  .page-products {
    --pp-rail: 5.5rem;
  }
}

/* ---------- 通用排版 ---------- */

.page-products .pp-crumb {
  padding-block: 1rem;
  border-bottom: var(--pp-border);
  background: var(--snow);
}

.page-products .pp-eyebrow {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-products .pp-eyebrow--signal {
  color: var(--signal);
}

.page-products .pp-section--mist .pp-eyebrow {
  color: var(--ink-700);
}

.page-products .pp-h1 {
  margin: 0 0 1.1rem;
  font-family: var(--font-sans);
  font-size: clamp(2.2rem, 7.2vw, 4.25rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--snow);
}

.page-products .pp-h2 {
  margin: 0 0 1rem;
  font-family: var(--font-sans);
  font-size: clamp(1.55rem, 4.2vw, 2.6rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--ink-900);
}

.page-products .pp-h2--light {
  color: var(--snow);
}

.page-products .pp-lede {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(1rem, 2.2vw, 1.12rem);
  line-height: 1.78;
  color: var(--mist);
}

.page-products .pp-text {
  margin: 0 0 1rem;
  max-width: 68ch;
  line-height: 1.78;
  color: var(--graphite);
}

.page-products .pp-text--tight {
  margin-top: 1.5rem;
  font-size: .95rem;
  color: var(--ink-700);
}

.page-products .pp-section--ink .pp-text {
  color: var(--mist);
}

.page-products .pp-section--ink .pp-h2 {
  color: var(--snow);
}

/* ---------- 首屏 ---------- */

.page-products .pp-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.5rem, 6vw, 4.25rem) clamp(3rem, 7vw, 5.5rem);
  background: var(--ink-800);
  border-bottom: var(--pp-border);
}

.page-products .pp-hero::after {
  content: "";
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: -26%;
  height: 46%;
  background: var(--signal);
  opacity: .12;
  transform: rotate(-2.5deg);
  pointer-events: none;
}

.page-products .pp-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(2rem, 5vw, 3.25rem);
  align-items: end;
}

@media (min-width: 900px) {
  .page-products .pp-hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

.page-products .pp-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 1.75rem;
}

.page-products .pp-facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 3px;
  background: var(--ink-700);
  border: 3px solid var(--ink-700);
}

.page-products .pp-fact {
  background: var(--ink-800);
  padding: 1.1rem 1rem;
  min-width: 0;
}

.page-products .pp-fact dt {
  margin-bottom: .5rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-products .pp-fact dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .3rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--snow);
}

.page-products .pp-num {
  font-size: clamp(1.5rem, 4.4vw, 2.05rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--snow);
}

.page-products .pp-num--signal {
  color: var(--signal);
}

.page-products .pp-unit {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 分带与栅格 ---------- */

.page-products .pp-section {
  padding-block: var(--pp-block);
  background: var(--snow);
  border-top: var(--pp-border);
}

.page-products .pp-section--mist {
  background: var(--mist);
}

.page-products .pp-section--ink {
  background: var(--ink-800);
  color: var(--snow);
  border-top-color: var(--ink-900);
}

.page-products .pp-rail-grid {
  display: grid;
  gap: var(--pp-rail-gap);
}

@media (min-width: 900px) {
  .page-products .pp-rail-grid {
    grid-template-columns: var(--pp-rail) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.25rem);
  }
}

.page-products .pp-body {
  min-width: 0;
}

.page-products .pp-rail-num {
  position: relative;
  display: block;
  padding-left: .9rem;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 8vw, 4.5rem);
  font-weight: 700;
  line-height: .85;
  letter-spacing: -.06em;
  color: var(--ink-800);
}

.page-products .pp-rail-num::before {
  content: "";
  position: absolute;
  left: 0;
  top: .12em;
  width: 3px;
  height: .72em;
  background: var(--signal);
}

.page-products .pp-section--ink .pp-rail-num {
  color: var(--snow);
}

.page-products .pp-section--ink .pp-rail-num::before {
  background: var(--pulse);
}

/* ---------- 装前检查 ---------- */

.page-products .pp-checks {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  border-top: var(--pp-border);
}

.page-products .pp-checks > li {
  display: grid;
  gap: .3rem 1.5rem;
  padding: 1.35rem 0;
  border-bottom: var(--pp-border);
}

@media (min-width: 640px) {
  .page-products .pp-checks > li {
    grid-template-columns: 8.5rem minmax(0, 1fr);
  }
}

.page-products .pp-check-key {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-700);
  padding-top: .22rem;
}

.page-products .pp-checks p {
  margin: 0;
  max-width: 62ch;
  line-height: 1.75;
}

/* ---------- 通用图片位 ---------- */

.page-products .pp-figure {
  position: relative;
  margin: 2.25rem 0 0;
  border: var(--pp-border);
  background: var(--snow);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

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

.page-products .pp-figure figcaption {
  padding: .55rem .85rem;
  border-top: var(--pp-border);
  background: var(--signal);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink-900);
}

.page-products .pp-figure--ink {
  border-color: var(--ink-950);
  box-shadow: 6px 6px 0 var(--ink-950);
}

.page-products .pp-figure--ink figcaption {
  border-top-color: var(--ink-950);
  background: var(--pulse);
  color: var(--ink-950);
}

/* ---------- 安卓 / iOS 切换 ---------- */

.page-products .pp-switch {
  margin-top: 2.25rem;
}

.page-products .pp-tabs {
  display: flex;
  width: fit-content;
  max-width: 100%;
  border: var(--pp-border);
  background: var(--ink-900);
}

.page-products .pp-tab {
  padding: .72rem 1.35rem;
  border-right: var(--pp-border);
  background: var(--snow);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-products .pp-tab:last-child {
  border-right: 0;
}

.page-products #pp-os-android:checked ~ .pp-tabs .pp-tab:nth-child(1),
.page-products #pp-os-ios:checked ~ .pp-tabs .pp-tab:nth-child(2) {
  background: var(--ink-900);
  color: var(--signal);
}

.page-products #pp-os-android:focus-visible ~ .pp-tabs .pp-tab:nth-child(1),
.page-products #pp-os-ios:focus-visible ~ .pp-tabs .pp-tab:nth-child(2) {
  outline: 3px solid var(--ice);
  outline-offset: 3px;
}

.page-products .pp-install-grid {
  margin-top: 1.75rem;
  display: grid;
  gap: 2rem;
}

@media (min-width: 840px) {
  .page-products .pp-install-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 290px);
    gap: clamp(1.75rem, 4vw, 3.25rem);
    align-items: start;
  }
}

.page-products .pp-panels {
  min-width: 0;
}

.page-products .pp-panel--ios {
  display: none;
}

.page-products #pp-os-ios:checked ~ .pp-install-grid .pp-panel--ios {
  display: block;
}

.page-products #pp-os-ios:checked ~ .pp-install-grid .pp-panel--android {
  display: none;
}

.page-products .pp-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--pp-border);
}

.page-products .pp-steps > li {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: .3rem 1rem;
  padding: 1.05rem 0;
  border-bottom: var(--pp-border);
}

.page-products .pp-step-no {
  font-family: var(--font-mono);
  font-size: .85rem;
  font-weight: 700;
  line-height: 1.75;
  color: var(--pulse);
}

.page-products .pp-step-body {
  min-width: 0;
  line-height: 1.72;
}

.page-products .pp-step-body strong {
  font-weight: 700;
  color: var(--ink-900);
}

.page-products .pp-phone {
  margin: 0;
  justify-self: start;
  width: 100%;
  max-width: 290px;
  padding: .55rem .55rem 0;
  border: var(--pp-border);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}

.page-products .pp-phone img {
  display: block;
  width: 100%;
  height: auto;
}

.page-products .pp-phone figcaption {
  padding: .6rem .2rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-align: center;
  color: var(--signal);
}

/* ---------- 复制条 ---------- */

.page-products .pp-copybar {
  margin-top: 2.25rem;
  padding-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: .8rem 1.1rem;
  align-items: center;
  border-top: var(--pp-border);
}

.page-products .pp-copyitem {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .55rem;
  max-width: 100%;
  padding: .5rem .8rem;
  border: var(--pp-border);
  background: var(--snow);
}

.page-products .pp-copykey {
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-products .pp-copyval {
  font-family: var(--font-mono);
  font-size: .84rem;
  font-weight: 700;
  color: var(--ink-900);
}

/* ---------- 双端对照表 ---------- */

.page-products .pp-tablewrap {
  margin-top: 2rem;
  border: var(--pp-border);
  background: var(--ink-800);
}

.page-products .pp-compare {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: .92rem;
}

.page-products .pp-compare th,
.page-products .pp-compare td {
  padding: .95rem 1.1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 3px solid var(--ink-700);
}

.page-products .pp-compare thead th {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--signal);
  background: var(--ink-900);
}

.page-products .pp-compare tbody th {
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 700;
  white-space: nowrap;
  color: var(--mist);
  background: var(--ink-900);
}

.page-products .pp-compare td {
  color: var(--snow);
  line-height: 1.7;
}

.page-products .pp-compare tbody tr:last-child th,
.page-products .pp-compare tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 换设备顺序 ---------- */

.page-products .pp-sequence {
  list-style: none;
  margin: 2.25rem 0 0;
  padding: 0;
}

.page-products .pp-sequence > li {
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 1fr);
  gap: .3rem 1.25rem;
  padding: 1.4rem 0;
  border-top: var(--pp-border);
}

.page-products .pp-sequence > li:last-child {
  border-bottom: var(--pp-border);
}

.page-products .pp-seq-num {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ice);
}

.page-products .pp-sequence p {
  margin: 0;
  max-width: 64ch;
  line-height: 1.72;
}

.page-products .pp-sequence strong {
  font-weight: 700;
  color: var(--ink-900);
}

/* ---------- 版本节奏 ---------- */

.page-products .pp-timeline {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-top: 2.25rem;
  border: var(--pp-border);
  background: var(--snow);
}

.page-products .pp-legend {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: .7rem;
}

.page-products .pp-legend li {
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  font-size: .92rem;
  line-height: 1.6;
  color: var(--ink-800);
}

.page-products .pp-dot {
  flex: 0 0 auto;
  width: .85rem;
  height: .85rem;
  margin-top: .3rem;
  border: 3px solid var(--ink-900);
}

.page-products .pp-dot--signal {
  background: var(--signal);
}

.page-products .pp-dot--pulse {
  background: var(--pulse);
}

.page-products .pp-faq {
  margin-top: 2.25rem;
  border-top: var(--pp-border);
}

.page-products .pp-faq .faq-item {
  border-bottom: var(--pp-border);
}

.page-products .pp-faq .faq-body p {
  margin: 0 0 .5rem;
  max-width: 66ch;
  line-height: 1.75;
}

.page-products .pp-faq .faq-body a {
  color: var(--ink-700);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .pp-faq .faq-body a:hover,
.page-products .pp-faq .faq-body a:focus-visible {
  color: var(--pulse);
}

/* ---------- 收束带 ---------- */

.page-products .pp-outro {
  padding-block: clamp(3rem, 7vw, 5.75rem);
  background: var(--ink-900);
  color: var(--snow);
  border-top: 3px solid var(--signal);
}

.page-products .pp-outro-links {
  display: grid;
  gap: 0;
  margin-top: 1.5rem;
  border-top: 3px solid var(--ink-700);
}

.page-products .pp-outro-links a {
  display: block;
  min-width: 0;
  padding: 1.1rem 0;
  border-bottom: 3px solid var(--ink-700);
  font-family: var(--font-mono);
  font-size: clamp(.9rem, 2.4vw, 1.15rem);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--snow);
  text-decoration: none;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.page-products .pp-outro-links a:hover,
.page-products .pp-outro-links a:focus-visible {
  color: var(--signal);
  padding-left: .75rem;
}

@media (min-width: 760px) {
  .page-products .pp-outro-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 3rem;
  }
}

/* ---------- 窄屏兜底 ---------- */

@media (max-width: 520px) {
  .page-products .pp-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-products .pp-tab {
    padding: .7rem 1rem;
    font-size: .72rem;
  }

  .page-products .pp-steps > li,
  .page-products .pp-sequence > li {
    grid-template-columns: 2.1rem minmax(0, 1fr);
    gap: .3rem .8rem;
  }

  .page-products .pp-phone {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pp-tab,
  .page-products .pp-outro-links a {
    transition: none;
  }
}
<<<END>>>