.page-products {
  --dl-gap: clamp(1.25rem, 3vw, 2.5rem);
  --track-card: min(58rem, 88vw);
  display: block;
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 面包屑 ---------- */
.page-products .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 clamp(1rem, 2.5vw, 1.75rem);
  font-size: 0.8125rem;
  color: var(--mist);
}

.page-products .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-products .breadcrumbs a:hover,
.page-products .breadcrumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-products .breadcrumbs [aria-current] {
  color: var(--white);
}

/* ---------- 双栏骨架 ---------- */
.page-products .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  min-width: 0;
}

.page-products .dl-canvas {
  order: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(2.75rem, 6vw, 5rem);
}

.page-products .dl-rail {
  order: 2;
  min-width: 0;
  border-top: var(--line-w) solid var(--line);
  padding-top: 1.1rem;
}

@media (min-width: 62rem) {
  .page-products .split {
    grid-template-columns: 14.5rem minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: start;
  }

  .page-products .dl-rail {
    order: 1;
    border-top: none;
    border-left: var(--line-w) solid var(--line);
    padding: 0 0 0 1.35rem;
    position: sticky;
    top: 6.5rem;
  }

  .page-products .dl-canvas {
    order: 2;
  }
}

/* ---------- 左栏索引 ---------- */
.page-products .rail-kicker {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-products .dl-rail-list {
  list-style: none;
  margin: 0 0 1.1rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.page-products .dl-rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.35rem 0.65rem;
  font-size: 0.8125rem;
  color: var(--mist);
  text-decoration: none;
  border: 2px solid var(--line);
  background: var(--ink-1);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-products .dl-rail-link .chapter-nav-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--line);
  transition: color 0.2s ease;
}

.page-products .dl-rail-link:hover,
.page-products .dl-rail-link:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
}

.page-products .dl-rail-link:hover .chapter-nav-num,
.page-products .dl-rail-link:focus-visible .chapter-nav-num {
  color: var(--cyan);
}

.page-products .dl-rail-link[data-active] {
  color: var(--ink-0);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-products .dl-rail-link[data-active] .chapter-nav-num {
  color: var(--ink-0);
}

@media (min-width: 62rem) {
  .page-products .dl-rail-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0.125rem;
  }

  .page-products .dl-rail-link {
    width: 100%;
    padding: 0.4rem 0.5rem;
    border: none;
    border-left: var(--line-w) solid transparent;
    background: transparent;
  }

  .page-products .dl-rail-link:hover,
  .page-products .dl-rail-link:focus-visible {
    border-left-color: var(--cyan);
  }

  .page-products .dl-rail-link[data-active] {
    background: var(--ink-2);
    color: var(--white);
    border-left-color: var(--cyan);
  }

  .page-products .dl-rail-link[data-active] .chapter-nav-num {
    color: var(--cyan);
  }
}

.page-products .rail-note {
  margin: 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--mist);
  max-width: 34ch;
}

/* ---------- 首屏 ---------- */
.page-products .dl-intro {
  position: relative;
  border: var(--line-w) solid var(--line);
  background:
    linear-gradient(135deg, rgba(43, 231, 208, 0.14), transparent 44%),
    var(--ink-1);
  padding: clamp(1.5rem, 4vw, 3rem);
  box-shadow: 8px 8px 0 0 rgba(43, 231, 208, 0.16);
}

.page-products .dl-intro::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: clamp(3rem, 8vw, 6rem);
  height: 6px;
  background: var(--orange);
}

.page-products .dl-intro h1 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 22ch;
}

.page-products .dl-intro .lede {
  margin: 0 0 1.6rem;
  max-width: 52ch;
  font-size: clamp(0.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: var(--mist);
}

.page-products .dl-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 区块通用 ---------- */
.page-products .dl-block {
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 3vw, 2rem);
  scroll-margin-top: 7rem;
}

.page-products .block-head {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 48rem) {
  .page-products .block-head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: clamp(1rem, 3vw, 2.25rem);
    align-items: start;
  }
}

.page-products .block-head .chapter-index {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

.page-products .block-head-text h2 {
  margin: 0.35rem 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.35rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-products .block-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-products .dl-figure {
  margin: 0;
}

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

/* ---------- 版本对照矩阵 ---------- */
.page-products .cmp-board {
  border: var(--line-w) solid var(--line);
  background: var(--ink-1);
  overflow: hidden;
}

.page-products .cmp-head {
  display: none;
}

.page-products .cmp-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .cmp-row {
  padding: 1.1rem 1rem;
}

.page-products .cmp-row + .cmp-row {
  border-top: 2px solid var(--line);
}

.page-products .cmp-row:hover {
  background: rgba(43, 231, 208, 0.05);
}

.page-products .cmp-key {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-products .cmp-head .cmp-key {
  font-size: 0.75rem;
  color: var(--mist);
}

.page-products .cmp-val {
  margin: 0 0 0.6rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .cmp-val:last-child {
  margin-bottom: 0;
}

.page-products .cmp-val--lead {
  color: var(--white);
  position: relative;
  padding-left: 0.85rem;
}

.page-products .cmp-val--lead::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--orange);
}

@media (max-width: 47.99rem) {
  .page-products .cmp-val::before {
    display: none;
  }

  .page-products .cmp-val[data-side]::after {
    content: attr(data-side);
    display: block;
    margin-bottom: 0.2rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.16em;
    color: var(--cyan);
  }

  .page-products .cmp-val--lead {
    padding-left: 0.85rem;
  }

  .page-products .cmp-val--lead::before {
    display: block;
    top: 1.5em;
  }
}

@media (min-width: 48rem) {
  .page-products .cmp-head {
    display: grid;
    grid-template-columns: minmax(9rem, 1.05fr) minmax(0, 1.45fr) minmax(0, 1.45fr);
    gap: 1.25rem;
    padding: 0.85rem 1.25rem;
    background: var(--ink-2);
    border-bottom: var(--line-w) solid var(--line);
  }

  .page-products .cmp-head .cmp-key,
  .page-products .cmp-head .cmp-col {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.16em;
    color: var(--cyan);
  }

  .page-products .cmp-row {
    display: grid;
    grid-template-columns: minmax(9rem, 1.05fr) minmax(0, 1.45fr) minmax(0, 1.45fr);
    gap: 1.25rem;
    align-items: start;
    padding: 1.1rem 1.25rem;
  }

  .page-products .cmp-key {
    margin: 0;
    font-size: 0.9375rem;
  }

  .page-products .cmp-val {
    margin: 0;
  }
}

/* ---------- 功能横滑轨道 ---------- */
.page-products .fn-track-wrap {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.page-products .track-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}

.page-products .track-hint {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-products .fn-track {
  display: flex;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 0.25rem 0.25rem 1.1rem;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
  -webkit-overflow-scrolling: touch;
}

.page-products .fn-track:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-products .fn-track::-webkit-scrollbar {
  height: 6px;
}

.page-products .fn-track::-webkit-scrollbar-track {
  background: var(--ink-1);
}

.page-products .fn-track::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-products .fn-card {
  scroll-snap-align: start;
  scroll-margin-top: 7rem;
  flex: 0 0 var(--track-card);
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.5vw, 1.75rem);
  padding: clamp(1.25rem, 3vw, 2.25rem);
  border: var(--line-w) solid var(--line);
  background: var(--ink-1);
  box-shadow: 6px 6px 0 0 rgba(7, 11, 31, 0.9);
}

.page-products .fn-head {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-products .fn-num {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  color: var(--ink-0);
  background: var(--cyan);
  padding: 0.2rem 0.55rem;
}

.page-products .fn-card h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 1.95rem);
  line-height: 1.18;
  color: var(--white);
}

.page-products .fn-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.1rem, 2.5vw, 1.75rem);
}

.page-products .fn-body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.page-products .fn-body > p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-products .fn-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-products .fn-points li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--white);
}

.page-products .fn-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.5rem;
  height: 2px;
  background: var(--cyan);
}

@media (min-width: 52rem) {
  .page-products .fn-main {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .fn-main--single {
    grid-template-columns: minmax(0, 1fr);
  }
}

.page-products .fn-figure img {
  max-height: 26rem;
}

.page-products .fn-figure--phone {
  max-width: 17rem;
  margin-inline: auto;
  border-width: 4px;
}

.page-products .fn-figure--phone img {
  max-height: 24rem;
}

/* ---------- 筛选面板示意 ---------- */
.page-products .query-demo {
  border: var(--line-w) solid var(--line);
  background: var(--ink-2);
}

.page-products .query-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.9rem;
  padding: 0.8rem 1rem;
}

.page-products .query-row + .query-row {
  border-top: 2px solid var(--line);
}

.page-products .query-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
  min-width: 4.5rem;
}

.page-products .query-val {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--white);
}

/* ---------- 安装与更新 ---------- */
.page-products .install-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

@media (min-width: 62rem) {
  .page-products .install-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-products .install-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  counter-reset: none;
}

.page-products .step {
  border: var(--line-w) solid var(--line);
  background: var(--ink-1);
  transition: border-color 0.2s ease;
}

.page-products .step[open] {
  border-color: var(--cyan);
}

.page-products .step summary {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  list-style: none;
}

.page-products .step summary::-webkit-details-marker {
  display: none;
}

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

.page-products .step-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--orange);
  border: 2px solid var(--orange);
  padding: 0.05rem 0.4rem;
}

.page-products .step-title {
  flex: 1;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-products .step-mark {
  position: relative;
  flex: none;
  width: 0.95rem;
  height: 0.95rem;
}

.page-products .step-mark::before,
.page-products .step-mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--cyan);
  transform: translateY(-50%);
}

.page-products .step-mark::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform 0.2s ease;
}

.page-products .step[open] .step-mark::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-products .step-text {
  margin: 0;
  padding: 0.15rem 1rem 1.1rem 3.6rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--mist);
}

@media (max-width: 33.99rem) {
  .page-products .step-text {
    padding-left: 1rem;
  }
}

.page-products .install-note {
  margin: 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--line);
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 68ch;
}

.page-products .install-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid rgba(43, 231, 208, 0.35);
  transition: border-color 0.2s ease;
}

.page-products .install-note a:hover,
.page-products .install-note a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 设备与账号 ---------- */
.page-products .device-grid {
  display: grid;
  gap: clamp(1rem, 2.5vw, 1.5rem);
}

@media (min-width: 48rem) {
  .page-products .device-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .device-card--wide {
    grid-column: 1 / -1;
  }
}

.page-products .device-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: clamp(1.1rem, 2.5vw, 1.75rem);
  border: var(--line-w) solid var(--line);
  background: var(--ink-2);
}

.page-products .device-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-products .device-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  line-height: 1.28;
  color: var(--white);
}

.page-products .device-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-products .device-card li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-products .device-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.45rem;
  height: 2px;
  background: var(--orange);
}

.page-products .device-card li a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid rgba(43, 231, 208, 0.35);
}

.page-products .device-card li a:hover,
.page-products .device-card li a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 收尾入口 ---------- */
.page-products .dl-next {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: var(--line-w) solid var(--line);
  background: linear-gradient(120deg, var(--ink-2), var(--ink-1));
}

.page-products .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

@media (min-width: 48rem) {
  .page-products .next-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.4rem 1.75rem;
  }
}

.page-products .next-list a {
  display: block;
  padding: 0.55rem 0;
  font-size: 0.9375rem;
  color: var(--white);
  text-decoration: none;
  border-bottom: 2px solid var(--line);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-products .next-list a:hover,
.page-products .next-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

@media (prefers-reduced-motion: reduce) {
  .page-products * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-products .fn-track {
    scroll-behavior: auto;
  }
}