.page-products {
  --pp-index: 208px;
  display: block;
  background: var(--ink-900);
  padding-bottom: 40px;
}

/* ---------- 面包屑 ---------- */
.page-products .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}
.page-products .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-products .breadcrumbs a:hover,
.page-products .breadcrumbs a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}
.page-products .breadcrumbs-sep {
  color: var(--hair-strong);
}

/* ---------- 首屏 ---------- */
.page-products .install-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 42px;
  background: var(--ink-900);
}
.page-products .install-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(760px 380px at 88% 4%, rgba(255, 106, 31, .18), transparent 60%),
    radial-gradient(620px 340px at 4% 94%, rgba(138, 92, 255, .16), transparent 64%);
  pointer-events: none;
}
.page-products .hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(147, 160, 196, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(147, 160, 196, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 78%);
  pointer-events: none;
}
.page-products .install-hero__shell {
  position: relative;
  display: grid;
  gap: 30px;
  align-items: start;
}
.page-products .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--neon);
}
.page-products .install-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 56px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--white);
}
.page-products .install-hero__lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}
.page-products .install-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-products .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.page-products .install-hero__media {
  margin: 0;
}

/* ---------- 版本刻度条 ---------- */
.page-products .version-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--hair);
}
.page-products .rail-item {
  position: relative;
  min-width: 0;
  padding: 16px 10px 0 12px;
  border-left: 1px solid var(--hair);
}
.page-products .rail-item:first-child {
  border-left: 0;
  padding-left: 0;
}
.page-products .rail-item::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-600);
  border: 1px solid var(--hair-strong);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}
.page-products .rail-item:first-child::before {
  left: 0;
}
.page-products .rail-item--now::before {
  top: -6px;
  left: 10px;
  width: 13px;
  height: 13px;
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: 0 0 14px rgba(255, 106, 31, .85), 0 0 30px rgba(255, 106, 31, .4);
}
.page-products .rail-item--now:first-child::before {
  left: -3px;
}
.page-products .rail-version {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  line-height: 1.5;
  color: var(--mist);
  transition: color .3s var(--ease);
}
.page-products .rail-item--now .rail-version {
  font-size: 20px;
  color: var(--amber);
  text-shadow: var(--glow-amber);
}
.page-products .rail-note {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  line-height: 1.55;
  color: var(--mist);
  opacity: .55;
  transition: opacity .2s var(--ease), color .2s var(--ease);
}
.page-products .rail-item:hover .rail-note,
.page-products .rail-item:focus-within .rail-note {
  opacity: 1;
  color: var(--white);
}
.page-products .rail-item--now .rail-note {
  opacity: 1;
  color: var(--amber);
}

/* ---------- 主布局 ---------- */
.page-products .install-layout {
  display: grid;
  gap: 0;
  padding-top: 12px;
  padding-bottom: 32px;
}
.page-products .install-main {
  min-width: 0;
}

/* ---------- 索引 ---------- */
.page-products .install-index {
  position: sticky;
  top: 0;
  z-index: 4;
  margin: 0 0 4px;
  padding: 10px 0 12px;
  background: linear-gradient(180deg, var(--ink-900) 74%, rgba(7, 11, 30, 0));
}
.page-products .toc-title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}
.page-products .toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-products .toc-list::-webkit-scrollbar {
  display: none;
}
.page-products .toc-list > li {
  flex: 0 0 auto;
}
.page-products .toc-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--hair);
  border-radius: 999px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}
.page-products .toc-link:hover,
.page-products .toc-link:focus-visible {
  color: var(--white);
  border-color: var(--hair-strong);
}
.page-products .toc-link[aria-current="true"] {
  color: var(--ink-900);
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: var(--glow-neon);
}

/* ---------- 章节通用 ---------- */
.page-products .pp-section {
  padding: 46px 0 8px;
  scroll-margin-top: 84px;
}
.page-products .pp-section:first-child {
  padding-top: 22px;
}
.page-products .pp-band {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 16px;
  align-items: start;
  margin: 0 0 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hair);
}
.page-products .pp-band::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 76px;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), rgba(255, 106, 31, 0));
}
.page-products .pp-band .band-num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  text-shadow: var(--glow-amber);
}
.page-products .pp-band .band-kicker {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}
.page-products .pp-band .band-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(21px, 4.6vw, 31px);
  line-height: 1.36;
  color: var(--white);
}
.page-products .pp-lead {
  max-width: 64ch;
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}
.page-products .pp-note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--ink-600);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--mist);
}
.page-products .pp-note a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 179, 71, .4);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-products .pp-note a:hover,
.page-products .pp-note a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}
.page-products .pp-subtitle {
  margin: 38px 0 18px;
  padding-left: 14px;
  border-left: 3px solid var(--neon);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.5;
  color: var(--white);
}

/* ---------- 版本概览 ---------- */
.page-products .change-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-products .change-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 16px 18px;
  background: var(--ink-800);
  border: 1px solid var(--hair);
  border-left: 2px solid var(--ink-600);
  border-radius: var(--radius);
  transition: border-color .22s var(--ease), transform .22s var(--ease), box-shadow .22s var(--ease);
}
.page-products .change-item:hover {
  transform: translateY(-2px);
  border-left-color: var(--neon);
  box-shadow: var(--shadow-soft);
}
.page-products .change-key {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
  white-space: nowrap;
}
.page-products .change-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--white);
}

/* ---------- 系统要求 ---------- */
.page-products .req-grid {
  display: grid;
  gap: 22px;
}
.page-products .req-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  background: var(--ink-800);
}
.page-products .req-table {
  width: 100%;
  min-width: 470px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-products .req-caption {
  padding: 13px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
  border-bottom: 1px solid var(--hair);
}
.page-products .req-table th,
.page-products .req-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--hair);
}
.page-products .req-table thead th {
  background: var(--ink-700);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber);
}
.page-products .req-table tbody th {
  font-size: 13px;
  font-weight: 500;
  color: var(--mist);
  white-space: nowrap;
}
.page-products .req-table td {
  color: var(--white);
}
.page-products .req-table tbody tr {
  transition: background .2s var(--ease);
}
.page-products .req-table tbody tr:hover {
  background: rgba(255, 106, 31, .06);
}
.page-products .req-table tbody tr:last-child th,
.page-products .req-table tbody tr:last-child td {
  border-bottom: 0;
}
.page-products .req-media {
  margin: 0;
}

/* ---------- 图片框景 ---------- */
.page-products .media-frame {
  position: relative;
  overflow: hidden;
  margin: 0;
  aspect-ratio: auto;
  border: 1px solid var(--hair);
  border-radius: var(--radius-lg);
  background: var(--ink-700);
  box-shadow: var(--shadow-soft);
}
.page-products .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 四步安装 ---------- */
.page-products .step-stack {
  display: grid;
  gap: 0;
}
.page-products .step-card {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px 18px;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(27, 36, 80, .78), rgba(14, 22, 51, .96));
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}
.page-products .step-card + .step-card {
  margin-top: 14px;
}
.page-products .step-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 106, 31, .5);
  box-shadow: 0 0 0 1px rgba(255, 106, 31, .16), var(--shadow-soft);
}
.page-products .step-num {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  text-shadow: var(--glow-amber);
}
.page-products .step-title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.5;
  color: var(--white);
}
.page-products .step-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}
.page-products .step-media {
  margin: 14px 0;
}

/* ---------- 打开之后 ---------- */
.page-products .look-grid {
  display: grid;
  gap: 26px;
}
.page-products .look-order {
  counter-reset: look;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-products .look-order > li {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 20px;
}
.page-products .look-order > li:last-child {
  padding-bottom: 0;
}
.page-products .look-order > li::before {
  counter-increment: look;
  content: "0" counter(look);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.6;
  color: var(--amber);
  text-shadow: var(--glow-amber);
}
.page-products .look-order > li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 8px;
  top: 30px;
  bottom: 6px;
  width: 1px;
  background-image: linear-gradient(to bottom, var(--hair-strong) 45%, transparent 45%);
  background-size: 1px 8px;
}
.page-products .look-body {
  min-width: 0;
}
.page-products .look-title {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
}
.page-products .look-order p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}
.page-products .look-media {
  margin: 0;
}

/* ---------- 活动形态 ---------- */
.page-products .activity-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-products .activity-card {
  padding: 18px 18px 20px;
  border: 1px solid var(--hair);
  border-top: 2px solid var(--ink-600);
  border-radius: var(--radius);
  background: var(--ink-800);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease);
}
.page-products .activity-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}
.page-products .activity-card:nth-child(1) {
  border-top-color: var(--neon);
}
.page-products .activity-card:nth-child(2) {
  border-top-color: var(--amber);
}
.page-products .activity-card:nth-child(3) {
  border-top-color: var(--violet);
}
.page-products .activity-card:nth-child(4) {
  border-top-color: var(--cyan);
}
.page-products .activity-tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
}
.page-products .activity-title {
  margin: 0 0 8px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}
.page-products .activity-body {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 更新记录 ---------- */
.page-products .log-grid {
  display: grid;
  gap: 26px;
}
.page-products .log-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--hair);
}
.page-products .log-item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--hair);
  transition: background .2s var(--ease);
}
.page-products .log-item:hover {
  background: rgba(255, 106, 31, .05);
}
.page-products .log-version {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.5;
  color: var(--amber);
  text-shadow: var(--glow-amber);
}
.page-products .log-body {
  min-width: 0;
}
.page-products .log-time {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}
.page-products .log-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--white);
}
.page-products .log-media {
  margin: 0;
}

/* ---------- 安装自查 ---------- */
.page-products .faq-stack {
  display: grid;
  gap: 10px;
}
.page-products .fix-item {
  overflow: hidden;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  background: var(--ink-800);
  transition: border-color .2s var(--ease);
}
.page-products .fix-item[open] {
  border-color: rgba(255, 106, 31, .4);
}
.page-products .fix-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 54px;
  padding: 14px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
  transition: color .2s var(--ease);
}
.page-products .fix-item summary::-webkit-details-marker {
  display: none;
}
.page-products .fix-item summary:hover,
.page-products .fix-item summary:focus-visible {
  color: var(--amber);
}
.page-products .fix-item summary::after {
  content: "";
  flex: 0 0 auto;
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--neon);
  border-bottom: 1.5px solid var(--neon);
  transform: rotate(45deg);
  transition: transform .24s var(--ease);
}
.page-products .fix-item[open] summary::after {
  transform: rotate(225deg);
}
.page-products .fix-body {
  padding: 14px 18px 18px;
  border-top: 1px solid var(--hair);
}
.page-products .fix-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 求助通道 ---------- */
.page-products .pp-section--contact {
  margin-top: 26px;
  padding: 40px 0 32px;
  border-top: 1px solid var(--hair);
}
.page-products .help-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-products .help-card {
  padding: 20px;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(27, 36, 80, .72), rgba(7, 11, 30, .92));
}
.page-products .help-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--mist);
}
.page-products .help-card .help-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}
.page-products .help-card .help-strong {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--white);
}
.page-products .help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 断点 ---------- */
@media (max-width: 719px) {
  .page-products .version-rail {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: 104px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: none;
  }
  .page-products .version-rail::-webkit-scrollbar {
    display: none;
  }
  .page-products .rail-note {
    display: none;
  }
  .page-products .rail-item--now .rail-version {
    font-size: 18px;
  }
}

@media (max-width: 560px) {
  .page-products .pp-band .band-num {
    font-size: 20px;
  }
  .page-products .change-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .page-products .step-card {
    gap: 12px;
    padding: 18px 16px;
  }
  .page-products .log-item {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 12px;
  }
}

@media (min-width: 640px) {
  .page-products .activity-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-products .step-media {
    width: 82%;
    margin-left: auto;
    margin-right: 0;
  }
}

@media (min-width: 760px) {
  .page-products .help-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-products .install-hero {
    padding: 34px 0 54px;
  }
  .page-products .install-hero__shell {
    grid-template-columns: 1.08fr .92fr;
    gap: 48px;
    align-items: center;
  }
  .page-products .req-grid {
    grid-template-columns: 1.1fr .9fr;
    gap: 32px;
    align-items: start;
  }
  .page-products .look-grid {
    grid-template-columns: 1.1fr .9fr;
    gap: 36px;
    align-items: start;
  }
  .page-products .log-grid {
    grid-template-columns: .9fr 1.1fr;
    gap: 40px;
    align-items: start;
  }
  .page-products .pp-section {
    padding-top: 56px;
  }
}

@media (min-width: 1080px) {
  .page-products .install-layout {
    grid-template-columns: minmax(0, 1fr) var(--pp-index);
    column-gap: 52px;
    align-items: start;
    padding-top: 26px;
  }
  .page-products .install-index {
    position: sticky;
    top: 96px;
    margin: 0;
    padding: 4px 0 4px 16px;
    background: none;
    border-left: 1px solid var(--hair);
  }
  .page-products .toc-title {
    margin-bottom: 14px;
  }
  .page-products .toc-list {
    display: block;
    overflow: visible;
    padding: 0;
  }
  .page-products .toc-list > li {
    margin-bottom: 2px;
  }
  .page-products .toc-link {
    display: block;
    min-height: 40px;
    padding: 9px 0;
    border: 0;
    border-radius: 0;
    font-size: 13px;
  }
  .page-products .toc-link:hover,
  .page-products .toc-link:focus-visible {
    color: var(--white);
  }
  .page-products .toc-link[aria-current="true"] {
    background: none;
    color: var(--amber);
    box-shadow: none;
    font-weight: 600;
  }
  .page-products .toc-link[aria-current="true"]::before {
    content: "";
    position: absolute;
    left: -17px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: var(--neon);
    box-shadow: var(--glow-neon);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .step-card:hover,
  .page-products .change-item:hover,
  .page-products .activity-card:hover {
    transform: none;
  }
}
</main>