.page-products {
  --pp-rail: 236px;
  --pp-offset: calc(var(--topbar-h) + 24px);
}

.page-products .breadcrumb {
  padding-block: 24px 0;
}

/* ---------- 首屏 ---------- */
.page-products .pp-hero {
  padding-block: 22px 34px;
}

.page-products .pp-hero__grid {
  display: grid;
  gap: 28px;
}

.page-products .pp-hero h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(30px, 7.6vw, 58px);
  line-height: 1.2;
  letter-spacing: .01em;
  margin: 12px 0 18px;
  color: var(--bb-ink);
}

.page-products .pp-hero__meta {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--bb-line-strong);
  font-size: 12.5px;
  line-height: 1.9;
  color: rgba(28, 31, 36, .66);
}

.page-products .pp-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--bb-line);
  border: 1px solid var(--bb-line-strong);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-products .pp-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 16px 16px;
  background: var(--bb-paper);
}

.page-products .pp-stats .stat__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 9vw, 60px);
  line-height: .92;
  letter-spacing: .03em;
  font-variant-numeric: tabular-nums;
  color: var(--bb-blue);
}

.page-products .pp-stats .stat__unit {
  font-family: var(--font-serif);
  font-size: 12.5px;
  margin-left: .2em;
  color: rgba(28, 31, 36, .6);
}

.page-products .pp-stats .stat__label {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(28, 31, 36, .7);
}

.page-products .pp-stats .stat:first-child {
  background: var(--bb-blue);
}

.page-products .pp-stats .stat:first-child .stat__num {
  color: #fff;
}

.page-products .pp-stats .stat:first-child .stat__unit,
.page-products .pp-stats .stat:first-child .stat__label {
  color: var(--bb-on-dark);
}

/* ---------- 类目通栏 ---------- */
.page-products .pp-cats {
  padding-block: 6px 30px;
}

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

.page-products .pp-cats .figure__frame {
  background: var(--bb-gray);
}

/* ---------- 打断条 ---------- */
.page-products .pp-interrupt {
  display: grid;
  gap: 6px;
  padding-block: 24px;
  border-top: 1px solid var(--bb-line-strong);
  border-bottom: 1px solid var(--bb-line-strong);
}

.page-products .pp-interrupt--after {
  margin-block: 10px 8px;
}

.page-products .pp-interrupt__num {
  display: flex;
  align-items: baseline;
  gap: .18em;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(52px, 13vw, 96px);
  line-height: .92;
  letter-spacing: .03em;
  color: var(--bb-orange);
  font-variant-numeric: tabular-nums;
}

.page-products .pp-interrupt__unit {
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0;
  color: var(--bb-ink);
}

.page-products .pp-interrupt__note {
  margin: 4px 0 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(28, 31, 36, .74);
}

/* ---------- 命名规则 ---------- */
.page-products .pp-naming__grid {
  display: grid;
  gap: 30px;
}

.page-products .pp-naming__formula {
  margin: 6px 0 22px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 4.2vw, 26px);
  letter-spacing: .06em;
  color: var(--bb-yellow);
  word-break: break-word;
}

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

.page-products .pp-naming__parts li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  padding-block: 16px;
  border-top: 1px solid rgba(255, 255, 255, .24);
}

.page-products .pp-naming__parts strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 15.5px;
  margin-bottom: 4px;
}

.page-products .pp-naming__parts p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--bb-on-dark);
}

.page-products .pp-naming__idx {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: .06em;
  color: var(--bb-orange);
  line-height: 1.4;
}

.page-products .pp-naming__fig .figure__frame {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .22);
}

.page-products .pp-naming__fig .figure__cap {
  color: var(--bb-on-dark);
}

/* ---------- 规格对照主舞台 ---------- */
.page-products .pp-stage {
  padding-block: 52px 44px;
}

.page-products .pp-stage__head {
  max-width: 60ch;
}

.page-products .pp-stage__head p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(28, 31, 36, .78);
}

.page-products .pp-stage__layout {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

.page-products .pp-index {
  background: var(--bb-gray);
  border-radius: var(--r-md);
  padding: 16px 14px;
}

.page-products .pp-index__cat {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--bb-ink);
}

.page-products .pp-index__code {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .06em;
  padding: 1px 8px;
  border-radius: var(--r-sm);
  background: var(--bb-blue);
  color: #fff;
}

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

.page-products .pp-index__list a {
  display: block;
  padding: 5px 8px;
  border-left: 3px solid transparent;
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .01em;
  color: var(--bb-ink);
  text-decoration: none;
}

.page-products .pp-index__list a:hover,
.page-products .pp-index__list a:focus-visible {
  background: var(--bb-paper);
  border-left-color: var(--bb-orange);
  color: var(--bb-blue);
}

.page-products .pp-table {
  min-width: 760px;
}

.page-products .pp-table__cap {
  caption-side: top;
  text-align: left;
  padding: 0 0 10px;
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(28, 31, 36, .66);
}

.page-products .pp-table th,
.page-products .pp-table td {
  font-variant-numeric: tabular-nums;
}

.page-products .pp-table td:first-child,
.page-products .pp-table th:first-child {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  white-space: nowrap;
}

.page-products .pp-table tr[id] {
  scroll-margin-top: var(--pp-offset);
}

.page-products .pp-table tbody[id] {
  scroll-margin-top: var(--pp-offset);
}

.page-products .pp-table td.pp-diff {
  position: relative;
  padding-left: 18px;
  color: var(--bb-red);
}

.page-products .pp-table td.pp-diff::after {
  content: "";
  position: absolute;
  left: 7px;
  bottom: 6px;
  width: 0;
  height: 0;
  border-left: 7px solid transparent;
  border-bottom: 7px solid var(--bb-red);
}

.page-products .pp-stage__foot {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

.page-products .pp-notes {
  border: 1px solid var(--bb-line-strong);
  border-radius: var(--r-md);
  padding: 14px 16px;
  background: #fff;
}

.page-products .pp-notes summary {
  cursor: pointer;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 15px;
  color: var(--bb-ink);
}

.page-products .pp-notes ul {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 7px;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(28, 31, 36, .78);
}

.page-products .pp-knob .figure__frame {
  background: var(--bb-gray);
}

/* ---------- 渠道版对照 ---------- */
.page-products .pp-channel__grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-products .pp-channel__col {
  border-radius: var(--r-lg);
  padding: 22px 20px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .24);
}

.page-products .pp-channel__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: .06em;
  color: #fff;
}

.page-products .pp-pairs {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-products .pp-pairs > div {
  display: grid;
  gap: 3px;
  padding-block: 11px;
  border-top: 1px dashed rgba(255, 255, 255, .3);
}

.page-products .pp-pairs > div:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-products .pp-pairs dt {
  font-size: 12.5px;
  letter-spacing: .05em;
  color: rgba(255, 255, 255, .74);
}

.page-products .pp-pairs dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: #fff;
}

.page-products .pp-channel__figs {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.page-products .pp-channel__figs .figure__frame {
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .2);
}

.page-products .pp-channel__figs .figure__cap {
  color: var(--bb-on-dark);
}

/* ---------- 系列追踪 ---------- */
.page-products .pp-series {
  padding-block: 52px 40px;
}

.page-products .pp-series__table {
  min-width: 680px;
  margin-top: 22px;
}

.page-products .pp-series__table td:nth-child(3) {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-products .pp-series__more {
  margin-top: 22px;
}

/* ---------- 询价前置 ---------- */
.page-products .pp-prep__grid {
  display: grid;
  gap: 26px;
}

.page-products .pp-prep__intro p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--bb-on-dark);
}

.page-products .pp-prep__hint {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 3px solid var(--bb-orange);
  font-size: 13.5px !important;
  color: rgba(255, 255, 255, .8) !important;
}

.page-products .pp-prep__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-products .pp-prep__list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 2px 14px;
  padding: 16px 18px;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .09);
  border: 1px solid rgba(255, 255, 255, .22);
}

.page-products .pp-prep__num {
  grid-row: span 2;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: .05em;
  color: var(--bb-yellow);
}

.page-products .pp-prep__list strong {
  font-family: var(--font-serif);
  font-size: 15.5px;
  color: #fff;
}

.page-products .pp-prep__list span:last-child {
  font-size: 14px;
  line-height: 1.75;
  color: var(--bb-on-dark);
}

.page-products .pp-prep__cta {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 22px;
  margin: 6px 0 0;
}

.page-products .pp-prep__link {
  color: #fff;
  font-size: 14.5px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-products .pp-index {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 18px;
  }

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

@media (min-width: 900px) {
  .page-products .pp-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: end;
  }

  .page-products .pp-stats {
    margin-bottom: 10px;
  }

  .page-products .pp-naming__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-products .pp-stage__layout {
    grid-template-columns: var(--pp-rail) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-products .pp-index {
    display: block;
    position: sticky;
    top: var(--pp-offset);
    max-height: calc(100vh - var(--pp-offset) - 24px);
    overflow-y: auto;
  }

  .page-products .pp-index__group + .pp-index__group {
    margin-top: 16px;
  }

  .page-products .pp-stage__foot {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-products .pp-channel__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-products .pp-prep__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 44px;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-products .pp-interrupt {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: 8px 32px;
  }

  .page-products .pp-interrupt .annotation {
    grid-column: 1;
  }

  .page-products .pp-interrupt__num {
    grid-column: 1;
  }

  .page-products .pp-interrupt__note {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: end;
    margin: 0 0 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pp-index__list a {
    transition: none;
  }
}