.page-products {
  --pm-radius: 2px;
  --pm-rule: rgba(42, 82, 124, 0.72);
}

.page-products section[id] {
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-products img {
  max-width: 100%;
  height: auto;
}

/* ---------- 布局骨架：左侧索引 + 右侧内容 ---------- */
.page-products .dl-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-bottom: 88px;
}

.page-products .dl-main {
  min-width: 0;
}

/* ---------- 版本索引条 ---------- */
.page-products .ver-rail {
  margin: 0 -24px 6px;
  padding: 14px 24px;
  background: var(--deep);
  border-top: 1px solid var(--pm-rule);
  border-bottom: 1px solid var(--pm-rule);
}

.page-products .ver-rail-cap,
.page-products .ver-rail-num {
  display: none;
}

.page-products .ver-index {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-products .ver-index::-webkit-scrollbar {
  display: none;
}

.page-products .ver-link {
  display: block;
  white-space: nowrap;
  padding: 6px 13px;
  border: 1px solid var(--pm-rule);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-products .ver-link:hover,
.page-products .ver-link:focus-visible {
  color: var(--gold);
  border-color: var(--gold-dim);
  background: rgba(228, 176, 74, 0.08);
}

/* ---------- 首屏下载卡片 ---------- */
.page-products .dl-hero {
  padding-top: 20px;
  padding-bottom: 6px;
}

.page-products .dl-card {
  position: relative;
  overflow: hidden;
  padding: 88px 22px 34px;
  border: 1px solid var(--pm-rule);
  border-radius: var(--pm-radius);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(47, 165, 160, 0.16) 0%, rgba(10, 27, 51, 0) 55%),
    linear-gradient(155deg, var(--deep) 0%, var(--ink) 72%);
  box-shadow: 0 22px 46px -34px rgba(0, 0, 0, 0.95);
}

.page-products .dl-version {
  position: absolute;
  top: 10px;
  left: 18px;
  font-family: var(--font-mono);
  font-size: 76px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.06em;
  color: rgba(228, 176, 74, 0.14);
  pointer-events: none;
  user-select: none;
}

.page-products .dl-hero-grid {
  display: grid;
  gap: 28px;
}

.page-products .dl-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-products .dl-lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-products .dl-cta {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  box-shadow: inset 0 0 0 1px var(--gold-dim);
}

.page-products .dl-cta::after {
  content: "";
  position: absolute;
  top: -12%;
  bottom: -12%;
  left: -58%;
  width: 42%;
  background: linear-gradient(100deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.42) 50%, rgba(255, 255, 255, 0) 100%);
  transform: skewX(-16deg);
  transition: left 440ms var(--ease);
  pointer-events: none;
}

.page-products .dl-cta:hover::after,
.page-products .dl-cta:focus-visible::after {
  left: 122%;
}

.page-products .dl-note {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--muted);
}

.page-products .dl-hero-figure {
  margin: 0;
  border: 1px solid var(--pm-rule);
  border-radius: var(--pm-radius);
  overflow: hidden;
  background: var(--steel);
  box-shadow: 0 16px 36px -28px rgba(0, 0, 0, 0.95);
}

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

/* ---------- 通用段落说明 ---------- */
.page-products .section-lede {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-products .media-frame {
  margin: 28px 0 0;
}

/* ---------- 系统要求表 ---------- */
.page-products .req-table {
  margin-top: 26px;
  border: 1px solid var(--pm-rule);
  border-radius: var(--pm-radius);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-products .req-row {
  display: grid;
  grid-template-columns: 0.9fr 1fr 1.1fr;
  min-width: 560px;
  border-top: 1px solid var(--pm-rule);
}

.page-products .req-row:first-child {
  border-top: 0;
}

.page-products .req-row > span {
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
  border-left: 1px solid var(--pm-rule);
}

.page-products .req-row > span:first-child {
  border-left: 0;
}

.page-products .req-head {
  background: var(--steel);
}

.page-products .req-head > span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-products .req-key {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(22, 56, 95, 0.42);
  color: var(--text);
}

.page-products .req-figure {
  margin: 28px 0 0;
}

/* ---------- 安装步骤 ---------- */
.page-products .steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .step {
  position: relative;
  padding: 24px 20px 22px;
  border: 1px solid var(--pm-rule);
  border-radius: var(--pm-radius);
  background: linear-gradient(180deg, rgba(22, 56, 95, 0.55) 0%, rgba(10, 27, 51, 0.32) 100%);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-products .step:hover {
  border-color: var(--gold-dim);
  transform: translateY(-2px);
}

.page-products .step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-products .step h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  color: var(--text);
}

.page-products .step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 收藏与费用 ---------- */
.page-products .fav-grid {
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-products .fav-grid .media-frame {
  margin: 0;
}

.page-products .fav-copy > p {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-products .fav-list {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .fav-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-products .fav-dot {
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(47, 165, 160, 0.16);
}

.page-products .fav-link {
  margin: 24px 0 0;
}

/* ---------- 更新节奏 ---------- */
.page-products .cadence-notes {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-products .cadence-note {
  padding: 20px 20px 22px;
  border: 1px solid var(--pm-rule);
  border-radius: var(--pm-radius);
  background: var(--ink);
}

.page-products .note-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--jade-light);
}

.page-products .cadence-note p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-products .cadence-link {
  margin: 26px 0 0;
}

/* ---------- 安装答疑 ---------- */
.page-products .qa-list {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.page-products .qa {
  border: 1px solid var(--pm-rule);
  border-radius: var(--pm-radius);
  background: rgba(15, 40, 70, 0.55);
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-products .qa[open] {
  border-color: var(--gold-dim);
  background: rgba(22, 56, 95, 0.5);
}

.page-products .qa summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 19px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.5;
  color: var(--text);
  transition: color 180ms var(--ease);
}

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

.page-products .qa summary::marker {
  content: "";
}

.page-products .qa summary:hover,
.page-products .qa summary:focus-visible {
  color: var(--gold);
}

.page-products .qa-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--pm-rule);
  border-radius: 50%;
  color: var(--gold);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.page-products .qa[open] .qa-icon {
  transform: rotate(90deg);
  border-color: var(--gold-dim);
}

.page-products .qa-a {
  padding: 0 20px 22px;
}

.page-products .qa-a p {
  margin: 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 更换设备 ---------- */
.page-products .device-band {
  display: grid;
  gap: 26px;
  padding: 32px 24px;
  border: 1px solid var(--gold-dim);
  border-radius: var(--pm-radius);
  background:
    radial-gradient(90% 120% at 0% 0%, rgba(228, 176, 74, 0.13) 0%, rgba(10, 27, 51, 0) 62%),
    var(--deep);
}

.page-products .device-band h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-products .device-text {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-products .device-metric {
  display: grid;
  justify-items: center;
  gap: 2px;
  padding: 22px 30px;
  border: 1px solid var(--pm-rule);
  border-radius: var(--pm-radius);
  background: rgba(10, 27, 51, 0.62);
}

.page-products .metric-num {
  font-family: var(--font-mono);
  font-size: 60px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--gold);
}

.page-products .metric-unit {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--muted);
}

.page-products .metric-label {
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  line-height: 1.5;
  color: var(--muted);
  text-align: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-products .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-products .device-band {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 44px;
    padding: 40px 38px;
  }
}

@media (min-width: 880px) {
  .page-products .dl-card {
    padding: 96px 40px 44px;
  }

  .page-products .dl-version {
    left: 26px;
    font-size: 92px;
  }

  .page-products .dl-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 42px;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-products .fav-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 46px;
  }
}

@media (min-width: 1024px) {
  .page-products .dl-layout {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 50px;
  }

  .page-products .ver-rail {
    position: sticky;
    top: calc(var(--head-h) + 34px);
    align-self: start;
    margin: 0;
    padding: 6px 0 0;
    background: transparent;
    border: 0;
  }

  .page-products .ver-rail-cap {
    display: block;
    margin: 0 0 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--muted);
  }

  .page-products .ver-rail-num {
    display: block;
    margin: 0 0 20px;
    font-family: var(--font-mono);
    font-size: 46px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.04em;
    color: var(--gold);
  }

  .page-products .ver-index {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--pm-rule);
  }

  .page-products .ver-link {
    position: relative;
    border: 0;
    border-radius: 0;
    padding: 9px 0 9px 16px;
    background: transparent;
    font-family: var(--font-body);
    font-size: 14px;
    color: var(--muted);
  }

  .page-products .ver-link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 1px;
    height: 0;
    background: var(--gold);
    transform: translateY(-50%);
    transition: height 200ms var(--ease);
  }

  .page-products .ver-link:hover,
  .page-products .ver-link:focus-visible {
    background: transparent;
    border-color: transparent;
    color: var(--gold);
  }

  .page-products .ver-link:hover::before,
  .page-products .ver-link:focus-visible::before {
    height: 62%;
  }

  .page-products .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .dl-cta::after {
    display: none;
  }

  .page-products .step:hover {
    transform: none;
  }

  .page-products .qa-icon,
  .page-products .ver-link::before,
  .page-products .step {
    transition: none;
  }
}