.page-products {
  --pd-gap: clamp(1.25rem, 3vw, 2.25rem);
  --pd-edge: clamp(1rem, 3vw, 1.75rem);
  --pd-ink: var(--frost-400);
}

/* ---------- 首屏 ---------- */
.page-products .pd-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--void-black);
  border-bottom: 1px solid var(--char-600);
}

.page-products .pd-hero__slash {
  position: absolute;
  z-index: 0;
  right: -18%;
  top: 6%;
  width: 78%;
  height: 118%;
  background: linear-gradient(150deg, rgba(228, 88, 30, 0.30), rgba(63, 126, 168, 0.12) 58%, transparent 84%);
  transform: rotate(-11deg);
  border-radius: var(--radius-l);
  pointer-events: none;
}

.page-products .pd-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--pd-gap);
  padding-block: clamp(2rem, 7vw, 4.5rem);
}

.page-products .pd-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--steel-500);
  text-transform: uppercase;
}

.page-products .pd-hero__copy .h-display {
  margin: 0;
}

.page-products .pd-hero__copy .lede {
  margin: 1rem 0 0;
  max-width: 34em;
}

.page-products .pd-hero__facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
  margin: 1.75rem 0 0;
  padding: 0;
}

.page-products .pd-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-left: 0.85rem;
  border-left: 3px solid var(--ember-500);
}

.page-products .pd-hero__facts .num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 5vw, 2.15rem);
  line-height: 1;
  color: var(--amber-400);
}

.page-products .pd-hero__factlabel {
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--steel-500);
}

.page-products .pd-hero__media {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--char-600);
  border-radius: var(--radius-l);
  background: var(--char-800);
}

.page-products .pd-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-products .pd-hero__media .media-frame__caption {
  padding: 0.65rem 0.9rem;
  border-top: 1px solid var(--char-600);
}

/* ---------- 正文两栏 ---------- */
.page-products .pd-body {
  display: grid;
  gap: var(--pd-gap);
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.page-products .pd-index {
  align-self: start;
}

.page-products .pd-index__title {
  margin: 0 0 0.6rem;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--steel-500);
}

.page-products .pd-index__list {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.6rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-products .pd-index__list li {
  flex: 0 0 auto;
}

.page-products .pd-index__list a {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--char-600);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--frost-400);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 150ms var(--ease), color 150ms var(--ease);
}

.page-products .pd-index__list a:hover,
.page-products .pd-index__list a:focus-visible {
  border-color: var(--ember-500);
  color: var(--frost-100);
}

.page-products .pd-index__list .num {
  font-family: var(--font-mono);
  color: var(--ember-300);
  margin-right: 0.15rem;
}

.page-products .pd-index__note {
  margin: 0.6rem 0 0;
  max-width: 22em;
}

/* ---------- 章节 ---------- */
.page-products .pd-sec {
  padding-block: clamp(1.75rem, 4.5vw, 3rem);
  border-top: 1px solid var(--char-600);
  scroll-margin-top: var(--sticky-top);
}

.page-products .pd-sec:first-child {
  border-top: none;
  padding-top: 0;
}

.page-products .pd-sec__index {
  margin: 0 0 0.4rem;
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  color: var(--ember-500);
}

.page-products .pd-sec .h-sec {
  margin: 0 0 0.9rem;
}

.page-products .pd-p {
  margin: 0 0 1.1rem;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--pd-ink);
}

.page-products .pd-p:last-child {
  margin-bottom: 0;
}

.page-products .pd-p a {
  color: var(--frost-100);
  text-decoration: underline;
  text-decoration-color: var(--ember-500);
  text-underline-offset: 3px;
}

.page-products .pd-p a:hover,
.page-products .pd-p a:focus-visible {
  color: var(--ember-300);
}

.page-products .pd-h3 {
  margin: 1.6rem 0 0.7rem;
  font-size: 1.0625rem;
  line-height: 1.35;
  color: var(--frost-100);
}

/* ---------- 字段分组卡 ---------- */
.page-products .pd-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 1.2rem 0 1.5rem;
}

.page-products .pd-group {
  padding: 0.9rem 1rem;
  background: var(--char-800);
  border: 1px solid var(--char-600);
  border-top: 3px solid var(--ember-500);
  border-radius: var(--radius-s);
}

.page-products .pd-group__count {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.375rem;
  line-height: 1;
  color: var(--amber-400);
}

.page-products .pd-group__title {
  margin: 0.45rem 0 0.3rem;
  font-size: 0.9375rem;
  color: var(--frost-100);
}

.page-products .pd-group__note {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--steel-500);
}

/* ---------- 表格 ---------- */
.page-products .pd-tablewrap {
  position: relative;
  margin-top: 0.5rem;
  overflow-x: auto;
  border: 1px solid var(--char-600);
  border-radius: var(--radius-m);
  background: var(--char-800);
  -webkit-overflow-scrolling: touch;
}

.page-products .pd-table {
  width: 100%;
  min-width: 44rem;
  border-collapse: collapse;
  font-size: 0.875rem;
  line-height: 1.6;
}

.page-products .pd-table caption {
  caption-side: top;
  padding: 0.7rem 0.9rem;
  text-align: left;
  color: var(--steel-500);
  border-bottom: 1px solid var(--char-600);
}

.page-products .pd-table thead th {
  position: sticky;
  top: 0;
  z-index: 3;
  padding: 0.6rem 0.9rem;
  text-align: left;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--frost-400);
  background: var(--char-600);
  border-bottom: 1px solid var(--char-600);
  white-space: nowrap;
}

.page-products .pd-table tbody th,
.page-products .pd-table tbody td {
  padding: 0.65rem 0.9rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--char-600);
  color: var(--pd-ink);
}

.page-products .pd-table tbody th {
  font-weight: 600;
  color: var(--frost-100);
  white-space: nowrap;
}

.page-products .pd-table tbody td:nth-child(2) {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--data-blue);
  white-space: nowrap;
}

.page-products .pd-table tbody td:nth-child(3) {
  min-width: 16rem;
  white-space: normal;
}

.page-products .pd-table tbody td:last-child {
  white-space: nowrap;
}

.page-products .pd-table tbody tr:last-child th,
.page-products .pd-table tbody tr:last-child td {
  border-bottom: none;
}

.page-products .pd-table thead th:first-child,
.page-products .pd-table tbody th {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--char-800);
  box-shadow: 1px 0 0 var(--char-600);
}

.page-products .pd-table thead th:first-child {
  z-index: 4;
  background: var(--char-600);
}

/* ---------- 公式与规则 ---------- */
.page-products .pd-formula {
  margin: 1rem 0 1.4rem;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(0.9rem, 2.6vw, 1.1rem);
  line-height: 1.5;
  color: var(--char-800);
  background: var(--frost-100);
  border-left: 4px solid var(--ember-500);
  border-radius: var(--radius-m);
  white-space: nowrap;
}

.page-products .pd-rules {
  display: grid;
  gap: 0.65rem;
  margin: 0 0 1.2rem;
  padding: 0;
}

.page-products .pd-rule {
  padding: 0.8rem 1rem;
  background: var(--char-800);
  border: 1px solid var(--char-600);
  border-left: 3px solid var(--data-blue);
  border-radius: var(--radius-s);
}

.page-products .pd-rule dt {
  margin-bottom: 0.3rem;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--data-blue);
}

.page-products .pd-rule dd {
  margin: 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--pd-ink);
}

/* ---------- 折叠条目 ---------- */
.page-products .pd-fold {
  margin-bottom: 0.5rem;
  padding: 0.45rem 0.9rem;
  background: rgba(42, 40, 37, 0.55);
  border: 1px solid var(--char-600);
  border-radius: var(--radius-s);
}

.page-products .pd-fold summary {
  padding: 0.35rem 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--frost-100);
  cursor: pointer;
  list-style: none;
}

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

.page-products .pd-fold summary::after {
  content: "＋";
  float: right;
  font-family: var(--font-mono);
  color: var(--ember-500);
}

.page-products .pd-fold[open] summary::after {
  content: "－";
}

.page-products .pd-fold__body {
  margin: 0.2rem 0 0.65rem;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--pd-ink);
}

/* ---------- 图解与步骤 ---------- */
.page-products .pd-figure {
  margin: 1.4rem 0;
  overflow: hidden;
  border: 1px solid var(--char-600);
  border-radius: var(--radius-m);
  background: var(--char-800);
}

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

.page-products .pd-figure .media-frame__caption {
  padding: 0.65rem 0.9rem;
  border-top: 1px solid var(--char-600);
}

.page-products .pd-steps {
  list-style: none;
  counter-reset: pd-step;
  display: grid;
  gap: 0.6rem;
  margin: 0 0 1.2rem;
  padding: 0;
}

.page-products .pd-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.7rem;
  align-items: start;
  max-width: 36em;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--pd-ink);
}

.page-products .pd-steps__n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--void-black);
  background: var(--amber-400);
  border-radius: 50%;
}

/* ---------- 级别刻度 ---------- */
.page-products .pd-tiers {
  list-style: none;
  display: grid;
  gap: 0.7rem;
  margin: 1.2rem 0 1.4rem;
  padding: 0;
}

.page-products .pd-tier {
  padding: 0.9rem 1rem;
  background: var(--char-800);
  border: 1px solid var(--char-600);
  border-radius: var(--radius-s);
}

.page-products .pd-tier__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
}

.page-products .pd-tier__name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--frost-100);
}

.page-products .pd-tier__val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.875rem;
  color: var(--amber-400);
}

.page-products .pd-meter {
  display: block;
  height: 6px;
  border-radius: 999px;
  background: var(--char-600);
  overflow: hidden;
}

.page-products .pd-meter__fill {
  display: block;
  width: var(--bar, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--data-blue-deep), var(--data-blue));
}

.page-products .pd-tier__note {
  margin: 0.6rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--steel-500);
}

/* ---------- 列表与可读性 ---------- */
.page-products .pd-bullets {
  list-style: none;
  display: grid;
  gap: 0.55rem;
  margin: 0 0 1.1rem;
  padding: 0;
}

.page-products .pd-bullets li {
  position: relative;
  max-width: 34em;
  padding-left: 1.1rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--pd-ink);
}

.page-products .pd-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.42rem;
  height: 0.42rem;
  background: var(--ember-500);
  transform: rotate(45deg);
}

.page-products .pd-bullets strong {
  color: var(--frost-100);
}

.page-products .pd-readability {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.2rem;
}

.page-products .pd-readability .media-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--char-600);
  border-radius: var(--radius-m);
  background: var(--char-800);
}

.page-products .pd-readability .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 26rem;
  object-fit: cover;
}

.page-products .pd-readability .media-frame__caption {
  padding: 0.65rem 0.9rem;
  border-top: 1px solid var(--char-600);
}

.page-products .pd-readability .pd-bullets {
  margin-bottom: 0;
}

/* ---------- 焦点态 ---------- */
.page-products a:focus-visible,
.page-products summary:focus-visible,
.page-products [tabindex]:focus-visible {
  outline: 2px solid var(--ember-500);
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-products .pd-groups {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-products .pd-readability {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-products .pd-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }

  .page-products .pd-hero__media {
    transform: translateY(1.25rem) rotate(-1.2deg);
  }
}

@media (min-width: 1000px) {
  .page-products .pd-body {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: clamp(1.5rem, 3.5vw, 3rem);
  }

  .page-products .pd-index__inner {
    position: sticky;
    top: var(--sticky-top);
  }

  .page-products .pd-index__list {
    flex-direction: column;
    gap: 0.15rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-products .pd-index__list a {
    display: block;
    border: none;
    border-left: 2px solid var(--char-600);
    border-radius: 0;
    padding: 0.35rem 0 0.35rem 0.7rem;
  }

  .page-products .pd-index__list a:hover,
  .page-products .pd-index__list a:focus-visible {
    border-left-color: var(--ember-500);
    background: rgba(228, 88, 30, 0.07);
  }

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

  .page-products .pd-sec--duo {
    padding-left: 1.25rem;
    border-left: 1px solid var(--char-600);
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-products .pd-hero__media {
    transform: none;
  }

  .page-products .pd-index__list a {
    transition: none;
  }
}

.page-products {
  --bar: 1rem;
}