.page-products {
  --pp-rail-w: 236px;
  --pp-gap: clamp(24px, 3.5vw, 52px);
  --pp-accent: var(--ak-lime);
  background: var(--ak-night);
  color: var(--ak-bone);
  font-family: var(--ak-font-sans);
}

/* ---------- 首屏 ---------- */
.page-products .pp-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 64px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--ak-line);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(199, 255, 62, 0.12), transparent 62%),
    radial-gradient(90% 70% at 0% 110%, rgba(134, 167, 196, 0.1), transparent 60%),
    linear-gradient(180deg, var(--ak-panel), var(--ak-night));
}

.page-products .pp-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(44, 68, 56, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 68, 56, 0.55) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.35;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
}

.page-products .pp-hero__inner {
  position: relative;
  z-index: 1;
}

.page-products .ak-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--ak-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ak-mist);
}

.page-products .ak-crumbs a {
  color: var(--ak-steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ak-t-fast) var(--ak-ease), border-color var(--ak-t-fast) var(--ak-ease);
}

.page-products .ak-crumbs a:hover,
.page-products .ak-crumbs a:focus-visible {
  color: var(--ak-lime);
  border-bottom-color: var(--ak-lime);
  outline: none;
}

.page-products .ak-crumbs__sep {
  color: var(--ak-line);
}

.page-products .ak-crumbs [aria-current="page"] {
  color: var(--ak-bone);
}

.page-products .pp-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 36px);
  margin-top: clamp(20px, 3vw, 36px);
}

.page-products .pp-hero__lead .ak-kicker {
  font-family: var(--ak-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ak-lime);
  text-transform: uppercase;
  margin: 0;
}

.page-products .ak-h1 {
  margin: 14px 0 0;
  font-family: var(--ak-font-sans);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.1;
  letter-spacing: 0.005em;
  color: var(--ak-bone);
}

.page-products .pp-hero__lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--ak-mist);
}

.page-products .pp-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-products .pp-quick {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-products .pp-quick__item {
  display: flex;
  background: var(--ak-panel);
}

.page-products .pp-quick__item:first-child {
  grid-column: 1 / -1;
}

.page-products .pp-quick__link {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  text-decoration: none;
  color: inherit;
  background: var(--ak-panel);
  transition: background var(--ak-t-fast) var(--ak-ease);
}

.page-products .pp-quick__item:first-child .pp-quick__link {
  background: var(--ak-board);
}

.page-products .pp-quick__link:hover,
.page-products .pp-quick__link:focus-visible {
  background: var(--ak-board);
  outline: none;
}

.page-products .pp-quick__link:focus-visible {
  outline: 2px solid var(--ak-lime);
  outline-offset: -2px;
}

.page-products .pp-quick__no {
  font-family: var(--ak-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ak-lime);
}

.page-products .pp-quick__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ak-bone);
}

.page-products .pp-quick__desc {
  font-size: 13px;
  line-height: 1.62;
  color: var(--ak-mist);
}

/* ---------- 主体两栏 ---------- */
.page-products .pp-body {
  padding: clamp(32px, 5vw, 64px) 0 clamp(40px, 7vw, 88px);
}

.page-products .pp-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-products .pp-rail {
  border: 1px solid var(--ak-line);
  background: var(--ak-panel);
}

.page-products .pp-rail__title {
  margin: 0;
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--ak-line);
  font-family: var(--ak-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ak-steel);
  text-transform: uppercase;
}

.page-products .pp-rail__list {
  list-style: none;
  margin: 0;
  padding: 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-products .pp-rail__item {
  flex: 0 0 auto;
}

.page-products .pp-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  color: var(--ak-mist);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color var(--ak-t-fast) var(--ak-ease),
    border-color var(--ak-t-fast) var(--ak-ease),
    background var(--ak-t-fast) var(--ak-ease);
}

.page-products .pp-rail__idx {
  font-family: var(--ak-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ak-steel);
}

.page-products .pp-rail__link:hover,
.page-products .pp-rail__link:focus-visible {
  color: var(--ak-bone);
  background: var(--ak-board);
  border-left-color: var(--ak-lime);
  outline: none;
}

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

/* ---------- 章节 ---------- */
.page-products .pp-chapter {
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--ak-line);
  margin-bottom: clamp(34px, 4.5vw, 60px);
  scroll-margin-top: 96px;
}

.page-products .pp-chapter:last-child {
  margin-bottom: 0;
}

.page-products .pp-chapter:target {
  border-top-color: var(--pp-accent);
}

.page-products #ios { --pp-accent: var(--ak-lime); }
.page-products #latest { --pp-accent: var(--ak-steel); }
.page-products #register { --pp-accent: var(--ak-orange); }
.page-products #range { --pp-accent: var(--ak-lime); }
.page-products #versions { --pp-accent: var(--ak-steel); }
.page-products #cases { --pp-accent: var(--ak-orange); }
.page-products #cross { --pp-accent: var(--ak-lime); }

.page-products .pp-chapter__head {
  max-width: 44em;
  margin-bottom: clamp(18px, 2.5vw, 28px);
}

.page-products .pp-chapter__no {
  margin: 0 0 10px;
  font-family: var(--ak-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--pp-accent);
}

.page-products .pp-chapter .ak-h2 {
  margin: 0 0 12px;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.28;
  font-weight: 800;
  color: var(--ak-bone);
  letter-spacing: 0.004em;
}

.page-products .pp-text {
  margin: 0 0 12px;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ak-mist);
}

.page-products .pp-text:last-child {
  margin-bottom: 0;
}

.page-products .pp-note {
  margin: clamp(16px, 2vw, 22px) 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--pp-accent);
  background: var(--ak-panel);
  font-size: 14px;
  line-height: 1.72;
  color: var(--ak-bone);
}

/* ---------- 分栏与图 ---------- */
.page-products .pp-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 30px);
  align-items: start;
}

.page-products .pp-figure {
  margin: 0;
  border: 1px solid var(--ak-line);
  background: var(--ak-panel);
  padding: 10px;
}

.page-products .pp-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(44, 68, 56, 0.9);
  background: var(--ak-board);
}

.page-products .pp-figure__cap {
  margin-top: 10px;
  font-family: var(--ak-font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--ak-mist);
}

.page-products .pp-figure--wide {
  margin-top: clamp(18px, 2.5vw, 26px);
}

/* ---------- 设备框 ---------- */
.page-products .pp-device {
  margin: 0 auto;
  width: 100%;
  max-width: 360px;
  border: 1px solid var(--ak-line);
  border-radius: 20px;
  padding: 12px 12px 14px;
  background: linear-gradient(180deg, var(--ak-board), var(--ak-panel));
  box-shadow: 0 20px 40px -32px rgba(0, 0, 0, 0.9);
}

.page-products .pp-device img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid rgba(44, 68, 56, 0.9);
}

.page-products .pp-device__cap {
  margin-top: 12px;
  font-family: var(--ak-font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--ak-mist);
  text-align: center;
}

/* ---------- 规格表 ---------- */
.page-products .pp-spec {
  margin: 18px 0 0;
  border-top: 1px solid var(--ak-line);
}

.page-products .pp-spec__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--ak-line);
}

.page-products .pp-spec dt {
  font-family: var(--ak-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ak-lime);
  padding-top: 2px;
}

.page-products .pp-spec dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ak-bone);
}

/* ---------- 交锋矩阵 ---------- */
.page-products .pp-matrix-wrap {
  margin-top: 18px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--ak-line);
  background: var(--ak-panel);
}

.page-products .pp-matrix {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13px;
}

.page-products .pp-matrix th {
  padding: 11px 12px;
  text-align: left;
  font-family: var(--ak-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ak-steel);
  border-bottom: 1px solid var(--ak-line);
  white-space: nowrap;
}

.page-products .pp-matrix td {
  padding: 12px;
  border-bottom: 1px solid var(--ak-line);
  font-family: var(--ak-font-mono);
  font-size: 12.5px;
  color: var(--ak-bone);
  white-space: nowrap;
}

.page-products .pp-matrix tbody tr:last-child td {
  border-bottom: none;
}

.page-products .pp-matrix tbody tr {
  transition: background var(--ak-t-fast) var(--ak-ease);
}

.page-products .pp-matrix tbody tr:hover {
  background: var(--ak-board);
}

.page-products .pp-matrix .ak-tag {
  font-family: var(--ak-font-sans);
  font-size: 11.5px;
}

/* ---------- 注册三步 ---------- */
.page-products .pp-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-products .pp-step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 18px 24px;
  background: var(--ak-panel);
  transition: background var(--ak-t-fast) var(--ak-ease);
}

.page-products .pp-step::after {
  content: "";
  position: absolute;
  top: 22px;
  right: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ak-orange);
  opacity: 0.85;
}

.page-products .pp-step:hover {
  background: var(--ak-board);
}

.page-products .pp-step__no {
  font-family: var(--ak-font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ak-lime);
}

.page-products .pp-step__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ak-bone);
}

.page-products .pp-step__desc {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ak-mist);
}

.page-products .pp-register-extra {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-products .pp-register-extra .ak-btn {
  margin-top: 6px;
}

/* ---------- 对照路径 ---------- */
.page-products .pp-path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-products .pp-path__item {
  background: var(--ak-panel);
  padding: 20px 18px 22px;
  border-top: 2px solid transparent;
  transition: border-color var(--ak-t-fast) var(--ak-ease),
    background var(--ak-t-fast) var(--ak-ease);
}

.page-products .pp-path__item:hover {
  background: var(--ak-board);
  border-top-color: var(--ak-lime);
}

.page-products .pp-path__no {
  display: block;
  font-family: var(--ak-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ak-steel);
  margin-bottom: 10px;
}

.page-products .pp-path__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ak-bone);
}

.page-products .pp-path__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--ak-mist);
}

/* ---------- 版本时间轴 ---------- */
.page-products .pp-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--ak-line);
}

.page-products .pp-timeline__item {
  position: relative;
  padding-bottom: 22px;
}

.page-products .pp-timeline__item:last-child {
  padding-bottom: 4px;
}

.page-products .pp-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--ak-night);
  border: 1px solid var(--ak-steel);
  transform: rotate(45deg);
}

.page-products .pp-timeline__ver {
  margin: 0 0 6px;
  font-family: var(--ak-font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--ak-lime);
}

.page-products .pp-timeline__text {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--ak-mist);
}

/* ---------- 案例合集 ---------- */
.page-products .pp-cases {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-products .pp-case {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 22px;
  background: var(--ak-panel);
  transition: background var(--ak-t-fast) var(--ak-ease);
}

.page-products .pp-case:hover {
  background: var(--ak-board);
}

.page-products .pp-case .ak-tag {
  align-self: flex-start;
}

.page-products .pp-case__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ak-bone);
}

.page-products .pp-case__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--ak-mist);
}

/* ---------- 跨端 ---------- */
.page-products .pp-cross {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ak-line);
  border: 1px solid var(--ak-line);
}

.page-products .pp-cross__col {
  background: var(--ak-panel);
  padding: 20px 18px 22px;
}

.page-products .pp-cross__title {
  margin: 0 0 12px;
  font-family: var(--ak-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ak-steel);
}

.page-products .pp-cross__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products .pp-cross__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ak-bone);
}

.page-products .pp-cross__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--ak-lime);
}

/* ---------- 收尾 ---------- */
.page-products .pp-outro {
  border-top: 1px solid var(--ak-line);
  background: linear-gradient(180deg, var(--ak-panel), var(--ak-night));
  padding: clamp(30px, 4.5vw, 56px) 0 clamp(36px, 5vw, 64px);
}

.page-products .pp-outro__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 28px);
  align-items: center;
}

.page-products .pp-outro .ak-h2 {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.3;
  color: var(--ak-bone);
}

.page-products .pp-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-products .pp-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-products .pp-split--wide {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 1fr);
  }

  .page-products .pp-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .pp-cases {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-products .pp-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-products .pp-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .pp-outro__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-products .pp-outro__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-products .pp-body__grid {
    grid-template-columns: var(--pp-rail-w) minmax(0, 1fr);
    gap: var(--pp-gap);
  }

  .page-products .pp-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-products .pp-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow-x: visible;
    padding: 10px 8px 12px;
  }

  .page-products .pp-rail__item {
    flex: 1 1 auto;
  }

  .page-products .pp-rail__link {
    border: 1px solid transparent;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-products .pp-rail__link:hover,
  .page-products .pp-rail__link:focus-visible {
    border-left-color: var(--ak-lime);
  }
}

@media (min-width: 1200px) {
  .page-products .pp-device {
    margin: 0;
  }
}

@media (max-width: 719px) {
  .page-products .pp-quick {
    grid-template-columns: 1fr;
  }

  .page-products .pp-quick__item:first-child {
    grid-column: auto;
  }

  .page-products .pp-spec__row {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pp-quick__link,
  .page-products .pp-rail__link,
  .page-products .pp-step,
  .page-products .pp-case,
  .page-products .pp-path__item,
  .page-products .pp-matrix tbody tr,
  .page-products .ak-crumbs a {
    transition: none;
  }
}
<<<END>>>