.page-products {
  --prod-rail-w: 232px;
  --prod-tag-w: 156px;
  --prod-ink-soft: rgba(244, 241, 234, .68);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: 72px;
}

/* ---------- 面包屑 ---------- */
.page-products .prod-crumb-wrap {
  padding-top: 22px;
  padding-bottom: 10px;
}
.page-products .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--grey);
}
.page-products .breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.page-products .breadcrumb a:hover,
.page-products .breadcrumb a:focus-visible {
  color: var(--red);
  border-bottom-color: var(--red);
}
.page-products .breadcrumb .is-current {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-products .prod-hero {
  padding: 8px 0 44px;
}
.page-products .prod-hero-frame {
  background: var(--paper-2);
  border-radius: var(--radius-lg);
  padding: 34px 26px 30px;
  box-shadow: var(--shadow-1);
}
.page-products .prod-hero-head .kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--red);
  border-left: 3px solid var(--red);
  padding-left: 10px;
  margin-bottom: 16px;
}
.page-products .prod-hero-head h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.24;
  font-size: clamp(26px, 5.6vw, 48px);
  margin: 0 0 18px;
  color: var(--ink);
}
.page-products .prod-hero-head .lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
  max-width: 62ch;
}
.page-products .prod-hero-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 26px 0 24px;
  padding: 20px 0 4px;
  border-top: 1px solid var(--line-dark);
}
.page-products .prod-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 14px;
  border-left: 2px solid var(--gold-line);
}
.page-products .prod-stat-num {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy-900);
  letter-spacing: .02em;
}
.page-products .prod-stat-label {
  font-size: 13px;
  color: var(--grey);
  line-height: 1.5;
}
.page-products .prod-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-products .prod-hero-media {
  margin: 26px 0 0;
}

/* ---------- 三分栏骨架 ---------- */
.page-products .prod-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.page-products .prod-main {
  display: flex;
  flex-direction: column;
  gap: 44px;
  min-width: 0;
}
.page-products .prod-side {
  min-width: 0;
}

/* ---------- 左侧目录树 ---------- */
.page-products .prod-tree {
  padding: 20px 18px 22px;
  background: var(--paper-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
}
.page-products .prod-tree-head {
  border-bottom: 1px dashed var(--line-dark);
  padding-bottom: 12px;
  margin-bottom: 14px;
}
.page-products .prod-tree-cap {
  display: block;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold-deep);
  margin-bottom: 6px;
}
.page-products .prod-tree-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--ink);
}
.page-products .prod-tree-head .annotation {
  font-size: 12px;
  color: var(--grey);
  margin: 0;
}
.page-products .prod-tree-root,
.page-products .tree-children {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-products .tree-children {
  margin-left: 12px;
  border-left: 1px dashed var(--line-dark);
  padding-left: 10px;
}
.page-products .tree-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  background: transparent;
  border: 0;
  padding: 7px 4px;
  cursor: pointer;
  text-align: left;
  font: inherit;
  font-size: 13px;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  transition: background .18s var(--ease), color .18s var(--ease);
}
.page-products .tree-toggle:hover,
.page-products .tree-toggle:focus-visible {
  background: var(--index);
  color: var(--ink);
}
.page-products .tree-toggle:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 1px;
}
.page-products .tree-num {
  font-size: 11px;
  color: var(--gold-deep);
  letter-spacing: .04em;
  flex: 0 0 auto;
  min-width: 44px;
}
.page-products .tree-label {
  flex: 1 1 auto;
  line-height: 1.4;
}
.page-products .tree-caret {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--grey);
  border-bottom: 1.5px solid var(--grey);
  transform: rotate(45deg);
  transition: transform .2s var(--ease);
  flex: 0 0 auto;
  margin-top: -3px;
}
.page-products .tree-node[data-collapsed="true"] > .tree-toggle .tree-caret {
  transform: rotate(-45deg);
}
.page-products .tree-node[data-collapsed="true"] > .tree-children {
  display: none;
}
.page-products .tree-leaf {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 12.5px;
  line-height: 1.5;
  padding: 6px 4px 6px 0;
  color: var(--ink-soft);
  border-bottom: 1px dotted var(--line-dark-soft);
}
.page-products .tree-leaf:last-child {
  border-bottom: 0;
}
.page-products .tree-leaf .tree-num {
  color: var(--grey);
  min-width: 44px;
}

/* ---------- 右侧章节索引 ---------- */
.page-products .prod-rail {
  padding: 18px 14px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: var(--paper-2);
}
.page-products .prod-rail-cap {
  display: block;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold-deep);
  margin-bottom: 12px;
}
.page-products .rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
}
.page-products .rail-item {
  display: flex;
  align-items: baseline;
  gap: 7px;
  font-size: 12.5px;
  color: var(--ink-soft);
  padding: 4px 0;
  border-left: 2px solid transparent;
  padding-left: 8px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-products .rail-item .mono {
  color: var(--grey);
  font-size: 11px;
}
.page-products .rail-item.is-active {
  color: var(--ink);
  border-left-color: var(--red);
}
.page-products .rail-item.is-active .mono {
  color: var(--red);
}

/* ---------- 内容区块 ---------- */
.page-products .prod-block {
  padding-top: 4px;
}
.page-products .prod-block .section-head {
  margin-bottom: 18px;
}
.page-products .prod-block .section-title {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.015em;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.34;
  margin: 0 0 8px;
  color: var(--ink);
}
.page-products .prod-block .section-note {
  font-size: 12.5px;
  color: var(--grey);
  margin: 0;
}
.page-products .prod-block p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 18px;
  max-width: 68ch;
}
.page-products .prod-block .kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--red);
  margin-bottom: 10px;
}
.page-products .prod-block .section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-products .prod-sub {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--navy-900);
  margin: 24px 0 10px;
  padding-left: 10px;
  border-left: 3px solid var(--gold);
}
.page-products .prod-inline-media {
  margin: 6px 0 22px;
}
.page-products .prod-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

/* ---------- 典型路径 ---------- */
.page-products .prod-path {
  background: var(--index);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
  margin: 4px 0 22px;
}
.page-products .prod-path-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--red);
  margin-bottom: 10px;
}
.page-products .prod-path-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: none;
}
.page-products .prod-path-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--ink);
  line-height: 1.5;
}
.page-products .prod-path-idx {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--navy-900);
  color: var(--paper);
  font-size: 12px;
}

/* ---------- 深底区块 ---------- */
.page-products .prod-block--ink {
  background: linear-gradient(150deg, var(--navy-900) 0%, var(--navy-800) 58%, var(--navy-700) 100%);
  border-radius: var(--radius-lg);
  padding: 30px 22px 32px;
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.page-products .prod-block--ink::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px dashed rgba(201, 162, 39, .3);
  border-radius: var(--radius);
  pointer-events: none;
}
.page-products .prod-block--ink .section-title {
  color: var(--paper);
}
.page-products .prod-block--ink .section-note,
.page-products .prod-block--ink .annotation {
  color: var(--prod-ink-soft);
}
.page-products .prod-block--ink .kicker {
  color: var(--gold);
}
.page-products .prod-block--ink p {
  color: rgba(244, 241, 234, .82);
}
.page-products .prod-block--ink > * {
  position: relative;
  z-index: 1;
}
.page-products .prod-ink-media {
  margin: 8px 0 24px;
  border: 1px solid rgba(244, 241, 234, .14);
}
.page-products .prod-steps {
  display: grid;
  gap: 12px;
  margin: 0 0 22px;
}
.page-products .prod-step {
  border-left: 2px solid var(--gold-line);
  padding: 4px 0 4px 14px;
}
.page-products .prod-step-num {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold);
  margin-bottom: 5px;
}
.page-products .prod-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(244, 241, 234, .86);
}

/* ---------- 记录定位表 ---------- */
.page-products .prod-datalist {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-top: 1px solid var(--line-dark);
}
.page-products .prod-datalist li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 4px;
  border-bottom: 1px solid var(--line-dark-soft);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}
.page-products .prod-datalist-key {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--navy-900);
  font-weight: 700;
}
.page-products .prod-inline-media--right {
  margin-bottom: 24px;
}

/* ---------- 设备三列 ---------- */
.page-products .prod-devices {
  display: grid;
  gap: 14px;
  margin: 0 0 22px;
}
.page-products .prod-device {
  background: var(--paper-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 16px 16px 15px;
}
.page-products .prod-device-key {
  display: block;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--red);
  margin-bottom: 8px;
}
.page-products .prod-device p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 订阅卡 ---------- */
.page-products .prod-block--tight .section-note {
  margin-bottom: 0;
}
.page-products .prod-subscribe {
  display: grid;
  gap: 16px;
  margin: 6px 0 22px;
}
.page-products .prod-sub-card {
  background: var(--paper-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  padding: 22px 20px 20px;
}
.page-products .prod-sub-card .card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--navy-900);
  color: var(--paper);
  font-size: 12px;
  margin-bottom: 12px;
}
.page-products .prod-sub-card .card-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 10px;
}
.page-products .prod-sub-card .card-body {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 12px;
}
.page-products .prod-sub-card .card-meta {
  font-size: 12px;
  color: var(--grey);
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line-dark);
}
.page-products .prod-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-products .prod-hero-frame {
    padding: 40px 38px 34px;
  }
  .page-products .prod-hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
  .page-products .prod-block--ink {
    padding: 38px 34px 40px;
  }
  .page-products .prod-path-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
  .page-products .prod-datalist li {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
  .page-products .prod-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-products .prod-devices {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-products .prod-subscribe {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-products .prod-block .section-head {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
  .page-products .prod-block .section-head .kicker {
    margin-bottom: 0;
    text-align: right;
  }
}

/* ---------- 桌面三栏 ---------- */
@media (min-width: 1100px) {
  .page-products .prod-layout {
    grid-template-columns: var(--prod-rail-w) minmax(0, 1fr);
    gap: 36px 40px;
    align-items: start;
  }
  .page-products .prod-side-left {
    grid-column: 1;
    grid-row: 1;
    position: sticky;
    top: calc(var(--header-h-compact) + 18px);
    max-height: calc(100vh - var(--header-h-compact) - 42px);
    overflow-y: auto;
    scrollbar-width: thin;
  }
  .page-products .prod-main {
    grid-column: 2;
    grid-row: 1;
  }
  .page-products .prod-side-right {
    grid-column: 1 / -1;
    grid-row: 2;
    position: static;
  }
  .page-products .prod-rail {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 14px 20px;
    background: transparent;
    border: 0;
    border-top: 1px solid var(--line-dark);
    border-bottom: 1px solid var(--line-dark);
    border-radius: 0;
  }
  .page-products .prod-rail-cap {
    margin-bottom: 0;
    flex: 0 0 auto;
  }
  .page-products .rail {
    flex: 1 1 auto;
    flex-wrap: wrap;
    gap: 6px 22px;
  }
  .page-products .rail-item {
    border-left: 0;
    padding-left: 0;
    border-bottom: 2px solid transparent;
    transition: color .2s var(--ease), border-color .2s var(--ease);
  }
  .page-products .rail-item.is-active {
    border-left-color: transparent;
    border-bottom-color: var(--red);
  }
}

@media (min-width: 1280px) {
  .page-products .prod-layout {
    grid-template-columns: var(--prod-rail-w) minmax(0, 1fr) var(--prod-tag-w);
    gap: 44px;
  }
  .page-products .prod-main {
    grid-column: 2;
  }
  .page-products .prod-side-right {
    grid-column: 3;
    grid-row: 1;
    position: sticky;
    top: calc(var(--header-h-compact) + 18px);
    max-height: calc(100vh - var(--header-h-compact) - 42px);
    overflow-y: auto;
    scrollbar-width: thin;
  }
  .page-products .prod-rail {
    display: block;
    padding: 18px 14px;
    background: var(--paper-2);
    border: 1px solid var(--line-dark);
    border-radius: var(--radius-lg);
  }
  .page-products .prod-rail-cap {
    display: block;
    margin-bottom: 12px;
  }
  .page-products .rail {
    display: grid;
    gap: 4px;
  }
  .page-products .rail-item {
    border-left: 2px solid transparent;
    border-bottom: 0;
    padding-left: 8px;
  }
  .page-products .rail-item.is-active {
    border-left-color: var(--red);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}
<<<END>>>