.page-products {
  --pd-hair: var(--border-thin);
  --pd-glow-line: linear-gradient(
    90deg,
    var(--color-accent) 0%,
    color-mix(in srgb, var(--color-accent) 42%, transparent) 30%,
    transparent 78%
  );
  --pd-sticky-offset: var(--space-4);
}

/* ---------- 首屏 ---------- */

.page-products .pd-hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-8) var(--space-6);
  background-color: var(--color-surface);
  background-image:
    radial-gradient(circle at 6% -12%, color-mix(in srgb, var(--color-primary) 26%, transparent) 0%, transparent 56%),
    radial-gradient(circle at 94% 6%, color-mix(in srgb, var(--color-accent) 12%, transparent) 0%, transparent 46%);
  border-bottom: var(--pd-hair) solid var(--color-line);
}

.page-products .pd-hero__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-products .pd-hero__lede {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-products .pd-figures {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-2) var(--space-3);
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
}

.page-products .pd-figures__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.page-products .pd-figures__item + .pd-figures__item {
  padding-left: var(--space-3);
  border-left: var(--pd-hair) solid color-mix(in srgb, var(--color-accent) 52%, transparent);
}

.page-products .pd-figures__num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.page-products .pd-figures__key {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-products .pd-hero__rule {
  height: var(--pd-hair);
  margin-top: var(--space-6);
  background-image: var(--pd-glow-line);
}

.page-products .pd-hero__hint {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-products .pd-link {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-primary);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 160ms ease;
}

.page-products .pd-link:hover,
.page-products .pd-link:focus-visible {
  color: var(--color-primary);
}

.page-products .pd-link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 吸顶分组刻度条 ---------- */

.page-products .pd-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: color-mix(in srgb, var(--color-surface) 94%, transparent);
  border-bottom: var(--pd-hair) solid var(--color-line);
  backdrop-filter: blur(12px);
}

.page-products .pd-nav__inner {
  padding-block: var(--space-1);
}

.page-products .pd-nav__list {
  display: flex;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-products .pd-nav__list::-webkit-scrollbar {
  display: none;
}

.page-products .pd-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border: var(--pd-hair) solid transparent;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.page-products .pd-nav__link:hover {
  color: var(--color-ink);
}

.page-products .pd-nav__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 1px;
}

.page-products .pd-nav__link[aria-current="true"] {
  color: var(--color-ink);
  border-color: var(--color-primary);
  background-color: color-mix(in srgb, var(--color-primary) 16%, transparent);
}

.page-products .pd-nav__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.06em;
}

/* ---------- 图片 ---------- */

.page-products .pd-band {
  padding-top: var(--space-6);
}

.page-products .pd-shot {
  position: relative;
  margin: 0;
  border: var(--pd-hair) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface-alt);
}

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

.page-products .pd-shot--wide img {
  aspect-ratio: 16 / 7;
}

.page-products .pd-shot--square img {
  aspect-ratio: 1 / 1;
}

.page-products .pd-shot--landscape img {
  aspect-ratio: 10 / 7;
}

.page-products .pd-shot--tint::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-primary) 20%, transparent) 0%,
    color-mix(in srgb, var(--color-surface) 46%, transparent) 100%
  );
}

/* ---------- 分组区块 ---------- */

.page-products .pd-group {
  padding-block: var(--section-y);
  border-bottom: var(--pd-hair) solid var(--color-line);
}

.page-products .pd-group:nth-of-type(even) {
  background-color: color-mix(in srgb, var(--color-surface-alt) 34%, transparent);
}

.page-products .pd-group__head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.page-products .pd-group__num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-products .pd-group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-products .pd-group__note {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 卷条目 ---------- */

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

.page-products .pd-vol {
  display: grid;
  grid-template-columns: var(--space-6) minmax(0, 1fr);
  column-gap: var(--space-3);
  row-gap: var(--space-2);
  padding: var(--space-3) var(--space-2);
  border-top: var(--pd-hair) dashed var(--color-line);
  border-radius: var(--radius-sm);
  transition: background-color 160ms ease;
}

.page-products .pd-vol:hover,
.page-products .pd-vol:focus-within {
  background-color: color-mix(in srgb, var(--color-surface-alt) 52%, transparent);
}

.page-products .pd-vol__num {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
}

.page-products .pd-vol__body {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
}

.page-products .pd-vol__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-products .pd-vol__scope {
  margin: var(--space-1) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-products .pd-vol__facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}

.page-products .pd-vol__key {
  margin-right: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-products .pd-vol__val {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-products .pd-vol__check {
  margin: var(--space-2) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-ink-muted) 78%, transparent);
  transition: color 160ms ease;
}

.page-products .pd-vol:hover .pd-vol__check,
.page-products .pd-vol:focus-within .pd-vol__check {
  color: var(--color-ink-soft);
}

.page-products .pd-vol__state {
  grid-column: 2;
  grid-row: 2;
  justify-self: start;
  align-self: start;
  border-radius: 0;
  font-family: var(--font-mono);
}

/* 每组首条：玻璃质感卷封面 */

.page-products .pd-vol--lead {
  margin-bottom: var(--space-2);
  padding: var(--space-4) var(--space-3);
  border-top: 0;
  border: var(--pd-hair) solid color-mix(in srgb, var(--color-primary) 56%, transparent);
  border-radius: var(--radius-lg);
  background-color: color-mix(in srgb, var(--color-surface-deep) 62%, transparent);
  box-shadow: var(--shadow-1);
}

.page-products .pd-vol--lead:hover,
.page-products .pd-vol--lead:focus-within {
  background-color: color-mix(in srgb, var(--color-surface-deep) 74%, transparent);
  box-shadow: var(--shadow-2);
}

/* ---------- 说明块 ---------- */

.page-products .pd-note {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--pd-hair) dashed var(--color-line);
}

.page-products .pd-note__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-products .pd-note__list {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-3) 0 0;
  padding: 0;
  max-width: var(--measure);
  list-style: none;
}

.page-products .pd-note__list li {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-products .pd-note__key {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-products .pd-note__foot {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-products .pd-fields {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
}

.page-products .pd-fields__row {
  display: grid;
  gap: var(--space-1);
}

.page-products .pd-fields dt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
}

.page-products .pd-fields dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 尾部：核对与修订 ---------- */

.page-products .pd-tail {
  padding-block: var(--section-y-lg) var(--section-y);
  background-image: linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-surface) 92%, transparent) 0%,
    color-mix(in srgb, var(--color-surface-alt) 58%, transparent) 100%
  );
}

.page-products .pd-check {
  display: grid;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pd-check__item {
  padding-top: var(--space-3);
  border-top: var(--pd-hair) dashed var(--color-line);
}

.page-products .pd-check__num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-products .pd-check__item h3 {
  margin: var(--space-1) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-products .pd-check__item p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-products .pd-shot--tail {
  margin-top: var(--space-6);
}

.page-products .pd-return {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.page-products .pd-tail__foot {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* 锚点滚动避让吸顶刻度条 */

.page-products [data-section] {
  scroll-margin-top: var(--pd-sticky-offset);
}

/* ---------- 响应式 ---------- */

@media (min-width: 768px) {
  .page-products .pd-hero {
    padding-block: var(--space-8) var(--space-8);
  }

  .page-products .pd-figures {
    gap: var(--space-2) var(--space-6);
  }

  .page-products .pd-shot--side {
    max-width: 62%;
  }

  .page-products .pd-check {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-6);
  }
}

@media (min-width: 900px) {
  .page-products .pd-vol {
    grid-template-columns: var(--space-8) minmax(0, 1fr) auto;
    align-items: start;
    column-gap: var(--space-4);
    padding: var(--space-4) var(--space-3);
  }

  .page-products .pd-vol__num {
    font-size: var(--text-xl);
  }

  .page-products .pd-vol__state {
    grid-column: 3;
    grid-row: 1;
  }

  .page-products .pd-vol--lead {
    padding: var(--space-6) var(--space-4);
  }

  .page-products .pd-return {
    gap: var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pd-vol,
  .page-products .pd-vol__check,
  .page-products .pd-nav__link,
  .page-products .pd-link {
    transition: none;
  }
}