.page-products {
  --pd-gap: 16px;
  --pd-surface: linear-gradient(158deg, rgba(108, 63, 197, .18), rgba(20, 42, 92, .72) 46%, rgba(11, 27, 58, .92));
  --pd-hair: 1px solid rgba(42, 58, 102, .7);
}

/* ---------- 章节刻度导航 ---------- */
.page-products .pd-rail { display: none; }

@media (min-width: 1400px) {
  .page-products .pd-rail {
    display: grid;
    gap: 2px;
    position: fixed;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
    padding: 10px 6px;
    border: var(--glass-line);
    border-radius: var(--r-m);
    background: rgba(11, 27, 58, .78);
  }
}

.page-products .pd-rail__item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 9px;
  border-left: 2px solid transparent;
  border-radius: var(--r-s);
  font-size: var(--fs-12);
  color: var(--c-ink-dim);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease;
}

.page-products .pd-rail__item:hover,
.page-products .pd-rail__item:focus-visible {
  color: var(--c-ink-bright);
  border-left-color: var(--c-pulse);
}

/* ---------- 首屏框景 ---------- */
.page-products .pd-hero__frame {
  position: relative;
  margin-top: var(--sp-3);
  padding: clamp(24px, 4.5vw, 58px);
  border: var(--glass-line);
  border-radius: var(--r-l);
  background:
    radial-gradient(120% 100% at 84% 4%, rgba(154, 107, 255, .22), transparent 58%),
    linear-gradient(180deg, rgba(20, 42, 92, .62), rgba(11, 27, 58, .94));
  overflow: hidden;
}

.page-products .pd-hero__frame::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -42%;
  width: min(520px, 72%);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 255, .16), transparent 66%);
  pointer-events: none;
}

.page-products .pd-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--sp-5);
}

@media (min-width: 880px) {
  .page-products .pd-hero__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: end;
  }
}

.page-products .pd-hero h1 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 6.4vw, 3.8rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--c-ink-bright);
}

.page-products .pd-hero__intro {
  margin: var(--sp-3) 0 0;
  max-width: 48ch;
  font-size: var(--fs-17);
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--c-ink);
}

.page-products .pd-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3) var(--sp-1);
  margin: 0;
}

.page-products .pd-stat {
  min-width: 0;
  padding-left: 12px;
  border-left: 2px solid var(--c-galaxy);
}

.page-products .pd-stat__label {
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--c-ink-dim);
}

.page-products .pd-stat__num {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-28);
  line-height: 1;
  letter-spacing: .06em;
  color: var(--c-pulse);
}

/* ---------- 章节头 ---------- */
.page-products .pd-head {
  display: grid;
  gap: var(--sp-1);
  max-width: 64ch;
  margin-bottom: var(--sp-5);
}

.page-products .pd-head h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3.4vw, 2.3rem);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--c-ink-bright);
}

.page-products .pd-head__lede {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.85;
  color: var(--c-ink-dim);
}

.page-products .pd-sub {
  margin: 0 0 12px;
  font-size: var(--fs-17);
  color: var(--c-ink-bright);
}

/* ---------- 三入口卡 ---------- */
.page-products .pd-entries {
  display: grid;
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}

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

.page-products .pd-entry {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--sp-3);
  border: var(--glass-line);
  border-radius: var(--r-m);
  background: var(--pd-surface);
  color: inherit;
  text-decoration: none;
  transition: border-color .24s ease, transform .24s ease;
}

.page-products .pd-entry:hover,
.page-products .pd-entry:focus-visible {
  border-color: var(--c-pulse);
  transform: translateY(-3px);
}

.page-products .pd-entry__code {
  margin: 0;
  font-size: var(--fs-21);
  letter-spacing: .1em;
  color: var(--c-galaxy-2);
}

.page-products .pd-entry__title {
  margin: 0;
  font-size: var(--fs-21);
  line-height: 1.35;
  color: var(--c-ink-bright);
}

.page-products .pd-entry__meta {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--c-pulse);
}

.page-products .pd-entry__desc {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--c-ink-dim);
}

/* ---------- 图形容器 ---------- */
.page-products .pd-figure {
  margin: var(--sp-5) 0 0;
  border: var(--glass-line);
  border-radius: var(--r-m);
  background: rgba(11, 27, 58, .6);
  overflow: hidden;
}

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

.page-products .pd-figure figcaption {
  padding: 11px 16px;
  border-top: 1px solid rgba(42, 58, 102, .6);
  font-size: var(--fs-12);
  line-height: 1.75;
  color: var(--c-ink-dim);
}

/* ---------- 厅别区 ---------- */
.page-products .pd-hall-top {
  display: grid;
  gap: var(--sp-5);
  margin-bottom: var(--sp-3);
}

@media (min-width: 880px) {
  .page-products .pd-hall-top {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

.page-products .pd-hall-note p {
  margin: 0 0 12px;
  max-width: 42ch;
  font-size: var(--fs-15);
  line-height: 1.85;
  color: var(--c-ink-dim);
}

.page-products .pd-hall-note__meta {
  margin: 0;
  font-size: var(--fs-13);
  letter-spacing: .06em;
  color: var(--c-pulse);
}

.page-products .pd-hall-top .pd-figure {
  margin-top: 0;
}

.page-products .pd-groups {
  display: grid;
  gap: var(--pd-gap);
  margin-top: var(--sp-5);
}

.page-products .pd-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 14px 16px;
  border: var(--glass-line);
  border-radius: var(--r-m);
  background: rgba(20, 42, 92, .5);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color .24s ease, background-color .24s ease;
}

.page-products .pd-group__head:hover {
  border-color: var(--c-galaxy-2);
}

.page-products .pd-group[data-open="true"] .pd-group__head {
  border-color: var(--c-pulse);
  background: rgba(20, 42, 92, .74);
}

.page-products .pd-group__mark {
  font-size: var(--fs-13);
  letter-spacing: .08em;
  color: var(--c-galaxy-2);
}

.page-products .pd-group__name {
  font-size: var(--fs-17);
  color: var(--c-ink-bright);
}

.page-products .pd-group__meta {
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--c-ink-dim);
}

@media (max-width: 640px) {
  .page-products .pd-group__head {
    grid-template-columns: auto minmax(0, 1fr);
  }
  .page-products .pd-group__meta {
    grid-column: 1 / -1;
  }
}

.page-products .pd-group__body {
  padding-top: 14px;
}

.page-products .pd-group__inner {
  display: grid;
  gap: 8px;
}

@media (min-width: 720px) {
  .page-products .pd-group__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-products .pd-hall {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 10px 14px;
  border: var(--pd-hair);
  border-radius: var(--r-s);
  background: linear-gradient(90deg, rgba(108, 63, 197, .14), rgba(11, 27, 58, .6) 46%);
  transition: border-color .24s ease;
}

.page-products .pd-hall:hover {
  border-color: var(--c-galaxy-2);
}

.page-products .pd-hall__code {
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--c-pulse);
}

.page-products .pd-hall__name {
  font-size: var(--fs-15);
  color: var(--c-ink);
}

.page-products .pd-hall__count {
  font-size: var(--fs-13);
  letter-spacing: .06em;
  color: var(--c-ink-dim);
}

/* ---------- 呼吸刻度带 ---------- */
.page-products .pd-rule-band {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 10px 0;
}

.page-products .pd-rule-band__lead {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-pulse);
  box-shadow: var(--glow-pulse);
}

.page-products .pd-rule-band__ticks {
  flex: 1;
  height: 12px;
  border-bottom: 1px solid var(--c-rule);
  background-image: repeating-linear-gradient(90deg, var(--c-rule) 0 1px, transparent 1px 18px);
}

/* ---------- 档位刻度 ---------- */
.page-products .pd-tier-gauge {
  display: flex;
  gap: 6px;
  margin-top: var(--sp-5);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-rule);
}

.page-products .pd-tier-gauge__seg {
  position: relative;
  flex: 1 1 0;
  padding-top: 26px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--c-ink-dim);
  text-align: center;
  white-space: nowrap;
}

.page-products .pd-tier-gauge__seg::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 18px;
  transform: translateX(-50%);
  background: var(--c-galaxy-2);
}

.page-products .pd-tier-gauge__seg:nth-child(1) { flex-grow: 86; }
.page-products .pd-tier-gauge__seg:nth-child(2) { flex-grow: 104; }
.page-products .pd-tier-gauge__seg:nth-child(3) { flex-grow: 112; }
.page-products .pd-tier-gauge__seg:nth-child(4) { flex-grow: 121; }
.page-products .pd-tier-gauge__seg:nth-child(5) { flex-grow: 89; }

@media (max-width: 600px) {
  .page-products .pd-tier-gauge {
    flex-direction: column;
    gap: 8px;
    padding-bottom: 0;
    border-bottom: 0;
  }
  .page-products .pd-tier-gauge__seg {
    flex: 1 1 auto;
    padding: 6px 0 6px 20px;
    border-left: 1px solid var(--c-rule);
    text-align: left;
  }
  .page-products .pd-tier-gauge__seg::before {
    top: 50%;
    left: 0;
    width: 12px;
    height: 2px;
    transform: translateY(-50%);
  }
}

.page-products .pd-tiers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}

.page-products .pd-tier {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
}

.page-products .pd-tier__code {
  margin: 0;
  font-size: var(--fs-13);
  letter-spacing: .1em;
  color: var(--c-galaxy-2);
}

.page-products .pd-tier__count {
  margin: 0;
  font-size: var(--fs-28);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--c-pulse);
}

.page-products .pd-tier__count span {
  margin-left: 5px;
  font-size: var(--fs-12);
  color: var(--c-ink-dim);
}

.page-products .pd-tier__hint {
  margin: 0;
  font-size: var(--fs-13);
  line-height: 1.8;
  color: var(--c-ink-dim);
}

/* ---------- 分屏旁注通用 ---------- */
.page-products .split__aside h3 {
  margin: 0 0 10px;
  font-size: var(--fs-17);
  color: var(--c-ink-bright);
}

.page-products .split__aside p {
  margin: 0 0 12px;
  max-width: 42ch;
  font-size: var(--fs-15);
  line-height: 1.85;
  color: var(--c-ink-dim);
}

.page-products .pd-code {
  display: grid;
  gap: 10px;
}

.page-products .pd-code__row {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 12px 14px;
  border: var(--pd-hair);
  border-radius: var(--r-s);
  background: rgba(11, 27, 58, .55);
}

.page-products .pd-code__key {
  font-size: var(--fs-15);
  letter-spacing: .08em;
  color: var(--c-pulse);
}

.page-products .pd-code__val {
  font-size: var(--fs-13);
  line-height: 1.75;
  color: var(--c-ink-dim);
}

.page-products .pd-code__val a {
  color: var(--c-galaxy-2);
}

@media (max-width: 560px) {
  .page-products .pd-code__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }
}

/* ---------- 字段表 ---------- */
.page-products .pd-field-grid {
  display: grid;
  gap: var(--sp-5);
}

@media (min-width: 900px) {
  .page-products .pd-field-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-products .pd-table-wrap {
  overflow-x: auto;
  border: var(--glass-line);
  border-radius: var(--r-m);
  background: rgba(11, 27, 58, .5);
}

.page-products .pd-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: var(--fs-15);
}

.page-products .pd-table th,
.page-products .pd-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(42, 58, 102, .6);
  text-align: left;
  vertical-align: top;
}

.page-products .pd-table tbody tr:last-child th,
.page-products .pd-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-products .pd-table thead th {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--c-pulse);
}

.page-products .pd-table tbody th {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  font-weight: 400;
  white-space: nowrap;
  color: var(--c-ink-bright);
}

.page-products .pd-table td {
  line-height: 1.75;
  color: var(--c-ink-dim);
}

.page-products .pd-field-side {
  padding: var(--sp-3);
  border: var(--glass-line);
  border-radius: var(--r-m);
  background: var(--pd-surface);
}

.page-products .pd-muted-list {
  display: grid;
  gap: 8px;
  margin: 0 0 var(--sp-3);
  padding: 0;
  list-style: none;
}

.page-products .pd-muted-list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-15);
  line-height: 1.7;
  color: var(--c-ink-dim);
}

.page-products .pd-muted-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border: 1px solid var(--c-amber);
  border-radius: 50%;
}

.page-products .pd-field-side__note {
  margin: 0 0 var(--sp-3);
  font-size: var(--fs-13);
  line-height: 1.8;
  color: var(--c-ink-dim);
}

/* ---------- 前缀路径 ---------- */
.page-products .pd-prefix {
  display: grid;
  gap: 10px;
  margin-bottom: var(--sp-5);
}

.page-products .pd-prefix__row {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 11px 14px;
  border-left: 2px solid var(--c-galaxy);
  border-radius: 0 var(--r-s) var(--r-s) 0;
  background: rgba(20, 42, 92, .42);
}

.page-products .pd-prefix__code {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: .06em;
  color: var(--c-pulse);
}

.page-products .pd-prefix__desc {
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--c-ink-dim);
}

@media (max-width: 560px) {
  .page-products .pd-prefix__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }
}

/* ---------- 术语卡 ---------- */
.page-products .pd-card-layout {
  display: grid;
  gap: var(--sp-5);
}

@media (min-width: 1000px) {
  .page-products .pd-card-layout {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-products .pd-term-grid {
  display: grid;
  gap: var(--sp-3);
}

@media (min-width: 640px) {
  .page-products .pd-term-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-products .term-card {
  min-height: 216px;
  border-radius: var(--r-m);
  perspective: 1200px;
}

.page-products .term-card:focus-visible,
.page-products .term-card:focus-within {
  outline: 2px solid var(--c-pulse);
  outline-offset: 2px;
}

.page-products .term-card__inner {
  position: relative;
  width: 100%;
  height: 216px;
  transform-style: preserve-3d;
  transition: transform .56s cubic-bezier(.4, .1, .2, 1);
}

.page-products .term-card:is(:hover, :focus-within) .term-card__inner {
  transform: rotateY(180deg);
}

.page-products .term-card__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  overflow: hidden;
  border: var(--glass-line);
  border-radius: var(--r-m);
  background: var(--pd-surface);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-products .term-card__face--back {
  transform: rotateY(180deg);
  background: linear-gradient(158deg, rgba(0, 229, 255, .12), rgba(20, 42, 92, .8) 52%, rgba(11, 27, 58, .94));
}

.page-products .term-card__badge {
  position: absolute;
  top: 0;
  right: 0;
  padding: 4px 10px;
  border-left: 1px solid rgba(0, 229, 255, .5);
  border-bottom: 1px solid rgba(0, 229, 255, .5);
  border-radius: 0 var(--r-m) 0 var(--r-m);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--c-ink-bright);
  background: rgba(108, 63, 197, .72);
}

.page-products .pd-card__id {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--c-pulse);
}

.page-products .pd-card__term {
  margin: 0;
  font-size: var(--fs-21);
  line-height: 1.35;
  color: var(--c-ink-bright);
}

.page-products .pd-card__group {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--c-ink-dim);
}

.page-products .pd-card__hint {
  margin: auto 0 0;
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--c-ink-dim);
}

.page-products .pd-card__back-label {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--c-galaxy-2);
}

.page-products .pd-card__fields {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pd-card__fields li {
  padding-bottom: 5px;
  border-bottom: 1px dashed rgba(42, 58, 102, .8);
  font-size: var(--fs-13);
  line-height: 1.6;
  color: var(--c-ink);
}

.page-products .pd-card__back-meta {
  margin: auto 0 0;
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--c-pulse);
}

.page-products .pd-figure--struct {
  margin-top: 0;
}

@media (min-width: 1000px) {
  .page-products .pd-figure--struct {
    margin-top: 0;
  }
}

/* ---------- 收尾 ---------- */
.page-products .pd-outro__card {
  padding: clamp(24px, 3.6vw, 48px);
  border: var(--glass-line);
  border-radius: var(--r-l);
  background:
    radial-gradient(110% 120% at 6% 0%, rgba(108, 63, 197, .26), transparent 62%),
    linear-gradient(180deg, rgba(20, 42, 92, .62), rgba(11, 27, 58, .92));
}

.page-products .pd-outro__card h2 {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.3;
  color: var(--c-ink-bright);
}

.page-products .pd-outro__card p {
  margin: 0 0 var(--sp-3);
  max-width: 54ch;
  font-size: var(--fs-15);
  line-height: 1.85;
  color: var(--c-ink-dim);
}

.page-products .pd-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-products .pd-outro__link {
  padding: 9px 16px;
  border: var(--glass-line);
  border-radius: 999px;
  font-size: var(--fs-13);
  color: var(--c-ink);
  text-decoration: none;
  transition: border-color .24s ease, color .24s ease;
}

.page-products .pd-outro__link:hover,
.page-products .pd-outro__link:focus-visible {
  border-color: var(--c-pulse);
  color: var(--c-ink-bright);
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 520px) {
  .page-products .pd-hero__frame {
    padding: 20px;
  }
  .page-products .pd-stats {
    gap: var(--sp-3) 12px;
  }
  .page-products .pd-stat__num {
    font-size: var(--fs-21);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pd-entry,
  .page-products .pd-hall,
  .page-products .pd-group__head,
  .page-products .term-card__inner,
  .page-products .pd-outro__link,
  .page-products .pd-rail__item {
    transition: none;
  }
  .page-products .term-card__inner {
    transform: none;
  }
}