.page-products {
  background: var(--paper);
  display: block;
  padding-top: calc(var(--header-h) + 6px);
  padding-bottom: clamp(40px, 6vw, 72px);
}

/* ---------- 面包屑 ---------- */

.page-products .pp-crumbs {
  padding-bottom: 16px;
}

/* ---------- 首屏 ---------- */

.page-products .pp-head {
  background: transparent;
  padding-top: clamp(8px, 2vw, 20px);
  padding-bottom: clamp(28px, 4vw, 48px);
}

.page-products .pp-head-grid {
  align-items: start;
  row-gap: 34px;
}

.page-products .pp-title {
  margin: 10px 0 20px;
  max-width: 15ch;
}

.page-products .pp-head-main .lede {
  margin: 0 0 28px;
  max-width: 54ch;
}

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

.page-products .pp-status {
  background: var(--paper-2);
  border: 1px solid var(--hair);
  border-radius: var(--radius-md);
  padding: 22px 24px 24px;
}

.page-products .pp-status-title {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ice-ink);
}

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

.page-products .pp-status-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hair);
}

.page-products .pp-status-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-products .pp-status-key {
  font-size: 14px;
  color: var(--ink-muted);
}

.page-products .pp-status-val {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-products .pp-status-note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-muted);
}

/* ---------- 外壳：索引 + 主内容 ---------- */

.page-products .pp-shell {
  display: block;
  padding: 0 clamp(18px, 4vw, 32px);
}

.page-products .pp-index {
  display: none;
}

.page-products .pp-main {
  display: block;
}

.page-products .pp-main > .section {
  border-radius: var(--radius-lg);
  padding: clamp(38px, 6vw, 68px) clamp(22px, 4vw, 48px);
  margin-bottom: 18px;
}

.page-products .pp-main > .section:last-child {
  margin-bottom: 0;
}

.page-products .pp-sec--outline {
  border: 1px solid var(--hair);
}

.page-products .pp-chapter-num {
  display: inline-block;
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  line-height: .9;
  color: var(--hair);
  letter-spacing: -0.04em;
  margin-bottom: 6px;
}

.page-products .pp-sec .h-section {
  margin: 0 0 16px;
  max-width: 26ch;
}

.page-products .pp-sec .lede {
  margin: 0 0 34px;
  max-width: 58ch;
}

/* ---------- 章节 01：平台 ---------- */

.page-products .pp-media-lead {
  margin: 0 0 30px;
}

.page-products .pp-plat-nav {
  list-style: none;
  margin: 0 0 26px;
  padding: 0 0 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-products .pp-plat-pill {
  display: inline-block;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--hair);
  background: var(--paper);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: .04em;
  text-decoration: none;
  transition: border-color 180ms var(--ease), transform 180ms var(--ease), color 180ms var(--ease);
}

.page-products .pp-plat-pill:hover,
.page-products .pp-plat-pill:focus-visible {
  border-color: var(--pulse-ink);
  color: var(--pulse-ink);
  transform: translateY(-2px);
}

.page-products .pp-plat-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-products .pp-plat {
  flex: 1 1 240px;
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--hair);
  border-radius: var(--radius-md);
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 260ms var(--ease), border-color 260ms var(--ease);
}

.page-products .pp-plat:hover {
  transform: translateY(-3px);
  border-color: var(--pulse-ink);
}

.page-products .pp-plat-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-products .pp-plat-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-products .pp-plat-kind {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ice-ink);
}

.page-products .pp-plat-ver {
  margin: 2px 0 4px;
  font-size: clamp(1.6rem, 4vw, 2rem);
  line-height: 1;
  color: var(--gold-ink);
  letter-spacing: -0.02em;
}

.page-products .pp-plat-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-products .pp-plat-note {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-muted);
}

/* ---------- 章节 02：版本卡片 ---------- */

.page-products .pp-version-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-products .pp-version-card {
  background: var(--black);
  border: 1px solid var(--night-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-night);
}

.page-products .pp-version-media {
  margin: 0;
  line-height: 0;
}

.page-products .pp-version-media img {
  display: block;
  width: 100%;
  height: clamp(150px, 22vw, 200px);
  object-fit: cover;
  opacity: .6;
}

.page-products .pp-version-body {
  padding: clamp(22px, 3.6vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-products .pp-version-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--ice);
}

.page-products .pp-version-num {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
}

.page-products .pp-version-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--night-text);
}

.page-products .pp-version-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--night-muted);
}

.page-products .pp-version-points {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products .pp-version-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--night-text);
}

.page-products .pp-version-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--pulse);
}

.page-products .pp-version-card--flat .pp-version-body {
  padding-top: clamp(28px, 4vw, 40px);
}

/* ---------- 章节 03：换版本轨道 ---------- */

.page-products .pp-media-track {
  margin: 0 0 32px;
}

.page-products .pp-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-products .pp-track-step {
  position: relative;
  background: var(--night);
  border: 1px solid var(--night-line);
  border-radius: var(--radius-md);
  padding: 24px 22px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-products .pp-track-num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--pulse);
  padding: 4px 10px;
  border: 1px solid rgba(53, 214, 164, .4);
  border-radius: var(--radius-pill);
  align-self: flex-start;
}

.page-products .pp-track-title {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--night-text);
}

.page-products .pp-track-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--night-muted);
}

.page-products .pp-track-detail {
  margin-top: 6px;
  border-top: 1px solid var(--night-line);
  padding-top: 14px;
}

.page-products .pp-track-detail summary {
  cursor: pointer;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ice);
  list-style: none;
}

.page-products .pp-track-detail summary::-webkit-details-marker {
  display: none;
}

.page-products .pp-track-detail summary::after {
  content: " +";
  font-family: var(--font-mono);
}

.page-products .pp-track-detail[open] summary::after {
  content: " −";
}

.page-products .pp-detail-line {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--night-muted);
  border-left: 1px solid var(--night-line);
  padding-left: 12px;
}

/* ---------- 章节 04：移动端入口 ---------- */

.page-products .pp-entry-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-products .pp-media-entry {
  margin: 0;
}

.page-products .pp-entry-notes .eyebrow {
  margin: 0 0 14px;
}

.page-products .pp-entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-products .pp-entry-list li {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hair);
}

.page-products .pp-entry-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-products .pp-entry-list .h-sub {
  margin: 0 0 6px;
}

.page-products .pp-entry-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-muted);
}

/* ---------- 章节 05：校验 ---------- */

.page-products .pp-verify-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-products .pp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.page-products .pp-table-caption {
  caption-side: top;
  text-align: left;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ice-ink);
  padding-bottom: 12px;
}

.page-products .pp-table th,
.page-products .pp-table td {
  text-align: left;
  padding: 14px 12px 14px 0;
  border-bottom: 1px solid var(--hair);
  vertical-align: top;
}

.page-products .pp-table thead th {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--ink-muted);
  border-bottom-color: var(--ink-muted);
}

.page-products .pp-table tbody td:first-child {
  color: var(--ink);
  font-size: 13px;
  white-space: nowrap;
}

.page-products .pp-table tbody td {
  color: var(--ink);
  line-height: 1.65;
}

.page-products .pp-verify-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-products .pp-verify-steps li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.page-products .pp-verify-idx {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--pulse-ink);
  color: var(--pulse-ink);
  font-size: 12px;
  line-height: 24px;
  text-align: center;
}

.page-products .pp-verify-steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-products .pp-media-verify {
  margin: 0;
}

/* ---------- 章节 06：节奏与兼容 ---------- */

.page-products .pp-cadence-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 30px;
}

.page-products .pp-cadence {
  background: var(--black);
  border: 1px solid var(--night-line);
  border-radius: var(--radius-md);
  padding: 24px 22px;
}

.page-products .pp-cadence-num {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 3.4vw, 1.9rem);
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-products .pp-cadence .h-sub {
  margin: 0 0 10px;
  color: var(--night-text);
}

.page-products .pp-cadence p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--night-muted);
}

.page-products .pp-compat {
  border-top: 1px solid var(--night-line);
  padding-top: 26px;
}

.page-products .pp-compat .eyebrow {
  margin: 0 0 16px;
  color: var(--ice);
}

.page-products .pp-compat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-products .pp-compat-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.page-products .pp-compat-idx {
  flex: none;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--pulse);
  padding-top: 3px;
}

.page-products .pp-compat-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--night-text);
}

.page-products .pp-compat-note {
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--night-muted);
}

/* ---------- 章节 07：出口 ---------- */

.page-products .pp-exit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-products .pp-exit {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--night-line);
  background: var(--night);
  text-decoration: none;
  transition: transform 260ms var(--ease), border-color 260ms var(--ease);
}

.page-products .pp-exit:hover,
.page-products .pp-exit:focus-visible {
  transform: translateY(-3px);
  border-color: var(--pulse);
}

.page-products .pp-exit-tag {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ice);
}

.page-products .pp-exit-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--night-text);
}

.page-products .pp-exit p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--night-muted);
}

.page-products .pp-exit-go {
  margin-top: auto;
  padding-top: 10px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--pulse);
}

.page-products .pp-foot-note {
  margin-top: 30px;
  border-top: 1px solid var(--night-line);
  padding-top: 22px;
}

.page-products .pp-foot-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--night-muted);
  max-width: 62ch;
}

/* ---------- 图片通用 ---------- */

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

/* ---------- 响应式 ---------- */

@media (max-width: 719px) {
  .page-products .pp-plat-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 8px;
  }

  .page-products .pp-plat-nav::-webkit-scrollbar {
    display: none;
  }

  .page-products .pp-plat-pill {
    flex: none;
  }

  .page-products .pp-table {
    font-size: 13px;
  }

  .page-products .pp-table th,
  .page-products .pp-table td {
    padding: 12px 8px 12px 0;
  }
}

@media (min-width: 720px) {
  .page-products .pp-cadence-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-products .pp-entry-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 34px;
  }
}

@media (min-width: 860px) {
  .page-products .pp-version-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-products .pp-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-products .pp-track-step::after {
    content: "";
    position: absolute;
    top: 34px;
    left: calc(100% + 1px);
    width: 13px;
    height: 1px;
    background: var(--pulse);
    opacity: .55;
  }

  .page-products .pp-track-step:last-child::after {
    display: none;
  }

  .page-products .pp-verify-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 36px;
  }
}

@media (min-width: 1080px) {
  .page-products .pp-shell {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 32px;
    display: grid;
    grid-template-columns: 184px minmax(0, 1fr);
    column-gap: 36px;
    align-items: start;
  }

  .page-products .pp-index {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 34px);
    padding-top: 34px;
  }

  .page-products .pp-index .chapter-index-title {
    margin: 0 0 14px;
    font-size: 11px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--ink-muted);
  }

  .page-products .pp-index .chapter-index-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 2px;
  }

  .page-products .pp-index .chapter-link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 7px 0 7px 12px;
    border-left: 2px solid transparent;
    font-size: 13px;
    line-height: 1.5;
    color: var(--ink-muted);
    text-decoration: none;
    transition: color 180ms var(--ease), border-color 180ms var(--ease);
  }

  .page-products .pp-index .chapter-link:hover {
    color: var(--ink);
  }

  .page-products .pp-index .chapter-link[aria-current="true"] {
    color: var(--ink);
    border-left-color: var(--pulse);
  }

  .page-products .pp-index .chapter-idx {
    font-size: 11px;
    letter-spacing: .08em;
    color: var(--ice-ink);
  }

  .page-products .pp-main > .section {
    padding: clamp(48px, 5vw, 72px) clamp(30px, 4vw, 52px);
    margin-bottom: 22px;
  }
}

@media (min-width: 1200px) {
  .page-products .pp-title {
    font-size: clamp(2.8rem, 4.4vw, 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pp-plat,
  .page-products .pp-plat-pill,
  .page-products .pp-exit {
    transition: none;
  }

  .page-products .pp-plat:hover,
  .page-products .pp-plat-pill:hover,
  .page-products .pp-exit:hover {
    transform: none;
  }
}