.page-products {
  --prod-gap: clamp(1.25rem, 2.6vw, 2.75rem);
  --prod-rail-w: 236px;
  --prod-line: rgba(42, 74, 62, 0.7);
  --prod-panel: #0d211a;
}

/* ---------- 页头 ---------- */
.page-products .prod-head {
  padding-block: clamp(1.5rem, 3vw, 2.5rem) clamp(2rem, 4vw, 3.25rem);
}

.page-products .prod-head .eyebrow {
  display: inline-block;
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-products .prod-head-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-products h1 {
  margin: 0 0 var(--space-3);
  font-size: var(--fs-display);
  line-height: var(--lh-tight);
  letter-spacing: -0.025em;
  max-width: 18ch;
}

.page-products .prod-lede {
  margin: 0 0 var(--space-4);
  max-width: 44ch;
  color: var(--paper-86);
  font-size: 1.0625rem;
  line-height: var(--lh-body);
}

.page-products .prod-nodes {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-products .prod-nodes li {
  background: var(--ink-800);
  padding: 0.7rem 0.85rem;
}

.page-products .prod-nodes .k {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-products .prod-nodes .v {
  display: block;
  margin-top: 0.25rem;
  font-size: var(--fs-small);
  color: var(--paper-86);
}

.page-products .prod-nodes li.prod-node--key .k {
  color: var(--amber);
}

.page-products .prod-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

/* ---------- 手机展示 ---------- */
.page-products .prod-phone-wrap {
  position: relative;
  max-width: 420px;
  margin-inline: auto;
  padding-block: 0.5rem;
}

.page-products .prod-phone {
  margin: 0;
}

.page-products .prod-phone-frame {
  width: min(100%, 300px);
  margin-inline: auto;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-700);
  box-shadow: 14px 16px 0 rgba(18, 48, 39, 0.55), 0 0 0 1px rgba(72, 242, 200, 0.08);
}

.page-products .prod-phone-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-products .prod-phone .media-caption {
  margin-top: 0.75rem;
  text-align: center;
  font-size: var(--fs-label);
  color: var(--mist);
}

.page-products .prod-chip {
  display: none;
}

/* ---------- 双栏与索引轴 ---------- */
.page-products .prod-split {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  padding-bottom: clamp(1rem, 2vw, 1.5rem);
}

.page-products .prod-rail-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-products .prod-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
}

.page-products .spy-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.4rem 0 0.4rem 0.7rem;
  border-left: 1px solid var(--line);
  color: var(--mist);
  font-size: var(--fs-small);
  line-height: 1.4;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-products .spy-link .num {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  opacity: 0.75;
}

.page-products .spy-link:hover,
.page-products .spy-link:focus-visible {
  color: var(--paper);
  border-left-color: var(--teal);
}

.page-products .spy-link.is-active {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-products .prod-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-products .prod-sec {
  padding-block: clamp(1.75rem, 3.5vw, 2.75rem);
  border-top: 1px solid var(--line-soft);
}

.page-products .prod-sec:first-of-type {
  border-top: 0;
  padding-top: clamp(0.75rem, 1.5vw, 1.25rem);
}

.page-products .prod-kicker {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-products .prod-h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-h2);
  line-height: 1.16;
  letter-spacing: -0.02em;
  max-width: 22ch;
}

.page-products .prod-note {
  margin: 0 0 var(--space-4);
  max-width: 48ch;
  color: var(--mist);
  line-height: var(--lh-body);
}

/* ---------- 时间线说明 ---------- */
.page-products .prod-stops {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-products .prod-stops li {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  background: var(--ink-800);
}

.page-products .prod-stops li:nth-child(2) {
  border-left-color: var(--cyan);
}

.page-products .prod-stops li:nth-child(3) {
  border-left-color: var(--amber);
}

.page-products .prod-stops h3 {
  margin: 0 0 0.35rem;
  font-size: var(--fs-h3);
  line-height: 1.35;
}

.page-products .prod-stops p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--paper-86);
}

/* ---------- 功能矩阵 ---------- */
.page-products .prod-matrix {
  display: grid;
  gap: 0.875rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-products .prod-mx {
  position: relative;
  margin: 0;
  padding: 1.25rem 1.125rem;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-products .prod-mx-num {
  display: block;
  margin: 0 0 0.5rem;
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-products .prod-mx h3 {
  margin: 0 0 0.5rem;
  font-size: var(--fs-h3);
  line-height: 1.35;
}

.page-products .prod-mx p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--paper-86);
}

.page-products .prod-mx p a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .prod-mx--a {
  background: linear-gradient(155deg, rgba(28, 122, 99, 0.42), rgba(13, 33, 26, 0.94));
  border-color: rgba(72, 242, 200, 0.28);
}

.page-products .prod-mx--a .prod-mx-num {
  color: var(--cyan);
}

.page-products .prod-mx--b {
  background: var(--ink-700);
}

.page-products .prod-mx--c {
  background: var(--ink-800);
  border-left: 3px solid var(--amber);
}

.page-products .prod-mx--d {
  background: rgba(72, 242, 200, 0.07);
  border-color: var(--line-soft);
}

.page-products .prod-mx-more {
  margin-top: 0.85rem;
}

.page-products .prod-mx-more summary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  color: var(--cyan);
  list-style: none;
}

.page-products .prod-mx-more summary::-webkit-details-marker {
  display: none;
}

.page-products .prod-mx-more summary::before {
  content: "+";
  font-size: 0.875rem;
}

.page-products .prod-mx-more[open] summary::before {
  content: "–";
}

.page-products .prod-mx-more summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-products .prod-mx-more p {
  margin: 0.5rem 0 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--paper-86);
}

.page-products .prod-mx-more p a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 图片通用 ---------- */
.page-products .prod-fig {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
}

.page-products .prod-fig-frame {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.page-products .prod-fig-frame--wide {
  aspect-ratio: 3 / 2;
}

.page-products .prod-fig-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-products .prod-fig .media-caption {
  margin-top: 0.7rem;
  font-size: var(--fs-label);
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 节点时间线 ---------- */
.page-products .prod-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-products .prod-tl-item {
  position: relative;
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
}

.page-products .prod-tl-item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 0.55rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.page-products .prod-tl-item--key::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 181, 71, 0.18);
}

.page-products .prod-tl-time {
  display: block;
  font-size: var(--fs-label);
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-products .prod-tl-item--key .prod-tl-time {
  color: var(--amber);
}

.page-products .prod-tl-item h3 {
  margin: 0.35rem 0 0.3rem;
  font-size: var(--fs-h3);
  line-height: 1.35;
}

.page-products .prod-tl-item p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--paper-86);
}

.page-products .prod-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0 0;
  padding: 0;
}

/* ---------- 迭代列表 ---------- */
.page-products .prod-vers {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-products .prod-vers li {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 0.5rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-products .prod-vers li:nth-child(even) {
  background: rgba(18, 48, 39, 0.5);
}

.page-products .prod-vers .idx {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  color: var(--teal);
}

.page-products .prod-vers h3 {
  margin: 0;
  font-size: var(--fs-h3);
  line-height: 1.35;
}

.page-products .prod-vers p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 设备区 ---------- */
.page-products .prod-band {
  padding-block: clamp(2rem, 4vw, 3.25rem);
}

.page-products .prod-devices {
  background: var(--ink-800);
  border-block: 1px solid var(--line);
}

.page-products .dev-switch {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-products .dev-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-products .dev-tab {
  flex: 1 1 8rem;
  cursor: pointer;
  padding: 0.7rem 1rem;
  border: 1px solid var(--line);
  background: var(--ink-700);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.08em;
  text-align: center;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.page-products .dev-tab:hover {
  color: var(--paper);
  border-color: var(--teal);
}

.page-products .dev-radio:checked + .dev-tab {
  background: var(--cyan-soft);
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-products .dev-radio:focus-visible + .dev-tab {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-products .dev-panels {
  flex: 0 0 100%;
  margin-top: 1rem;
  padding: clamp(1rem, 2.5vw, 1.5rem);
  border: 1px solid var(--line);
  background: rgba(7, 19, 15, 0.6);
}

.page-products .dev-panel {
  display: none;
}

.page-products #dev-ios:checked ~ .dev-panels .dev-panel--ios,
.page-products #dev-android:checked ~ .dev-panels .dev-panel--android,
.page-products #dev-web:checked ~ .dev-panels .dev-panel--web {
  display: block;
}

.page-products .dev-panel h3 {
  margin: 0 0 0.5rem;
  font-size: var(--fs-h3);
  line-height: 1.35;
}

.page-products .dev-panel > p {
  margin: 0 0 0.85rem;
  max-width: 46ch;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--paper-86);
}

.page-products .dev-panel > p a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .dev-panel .prod-tags {
  margin-top: 0;
}

.page-products .prod-fig--devices .prod-fig-frame {
  aspect-ratio: 4 / 3;
}

/* ---------- 场景 ---------- */
.page-products .prod-scene-grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

.page-products .prod-fig--night {
  margin: 0;
}

.page-products .prod-scene-copy {
  min-width: 0;
}

.page-products .prod-scene-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-products .prod-scene {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 0 0.9rem 1rem;
  border-left: 1px solid var(--line);
}

.page-products .prod-scene:nth-child(2) {
  border-left-color: var(--amber);
}

.page-products .prod-scene-num {
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-products .prod-scene h3 {
  margin: 0;
  font-size: var(--fs-h3);
  line-height: 1.35;
}

.page-products .prod-scene p {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.78;
  color: var(--paper-86);
}

/* ---------- 结尾行动 ---------- */
.page-products .prod-cta {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding: clamp(1.35rem, 3vw, 2.25rem);
  display: grid;
  gap: 1.25rem;
  border: 1px solid rgba(72, 242, 200, 0.28);
  background: linear-gradient(135deg, rgba(28, 122, 99, 0.26), rgba(7, 19, 15, 0.92));
}

.page-products .prod-cta-title {
  margin: 0 0 0.5rem;
  font-size: var(--fs-h3);
  line-height: 1.4;
}

.page-products .prod-cta p {
  margin: 0;
  max-width: 52ch;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--paper-86);
}

.page-products .prod-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

/* ---------- 平板 ---------- */
@media (min-width: 40rem) {
  .page-products .prod-nodes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-products .prod-stops li:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 48rem) {
  .page-products .prod-matrix {
    grid-template-columns: 1.45fr 1fr;
    grid-template-areas:
      "a b"
      "a c"
      "d d";
  }

  .page-products .prod-mx--a {
    grid-area: a;
  }

  .page-products .prod-mx--b {
    grid-area: b;
  }

  .page-products .prod-mx--c {
    grid-area: c;
  }

  .page-products .prod-mx--d {
    grid-area: d;
  }

  .page-products .prod-vers li {
    grid-template-columns: 3rem minmax(0, 13rem) minmax(0, 1fr);
    align-items: baseline;
    gap: 0.25rem 1rem;
  }

  .page-products .prod-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 60rem) {
  .page-products .prod-head-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-products .prod-phone {
    padding-block: 1rem;
  }

  .page-products .prod-phone-frame {
    width: min(100%, 320px);
  }

  .page-products .prod-chip {
    display: block;
    position: absolute;
    padding: 0.4rem 0.65rem;
    font-size: var(--fs-label);
    letter-spacing: 0.06em;
    line-height: 1.3;
    background: rgba(7, 19, 15, 0.9);
    border: 1px solid var(--line);
    color: var(--paper-86);
  }

  .page-products .prod-chip--a {
    top: 16%;
    left: 0;
    border-color: rgba(255, 181, 71, 0.55);
    color: var(--amber);
  }

  .page-products .prod-chip--b {
    bottom: 22%;
    right: 0;
    border-color: rgba(72, 242, 200, 0.5);
    color: var(--cyan);
  }

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

  .page-products .prod-stops li:first-child {
    grid-column: auto;
  }

  .page-products .prod-tl {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    position: relative;
  }

  .page-products .prod-tl::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 6px;
    height: 1px;
    background: var(--line);
  }

  .page-products .prod-tl-item {
    padding: 1.9rem 0.9rem 0;
    border-left: 0;
  }

  .page-products .prod-tl-item::before {
    top: 2px;
    left: 0.9rem;
  }

  .page-products .prod-scene-grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }

  .page-products .prod-scene-copy .prod-h2 {
    max-width: 20ch;
  }
}

@media (min-width: 64rem) {
  .page-products .prod-split {
    grid-template-columns: var(--prod-rail-w) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-products .prod-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
    align-self: start;
    padding-right: 0.5rem;
  }

  .page-products .prod-rail-list {
    display: block;
  }

  .page-products .prod-rail-list li + li {
    margin-top: 0.15rem;
  }

  .page-products .spy-link {
    display: flex;
    padding-left: 0.85rem;
    font-size: var(--fs-small);
  }
}

@media (min-width: 80rem) {
  .page-products .prod-matrix {
    grid-template-columns: 1.6fr 1fr;
    grid-template-areas:
      "a b"
      "a c"
      "d d";
    gap: 1rem;
  }

  .page-products h1 {
    max-width: 16ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .spy-link,
  .page-products .dev-tab {
    transition: none;
  }
}
<<<END>>>