/* =========================================================
   page-products · 产品中心
   作用域：.page-products
   ========================================================= */

.page-products {
  display: block;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-products .num {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
}

/* ============ 首屏 ============ */

.page-products .products-hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: clamp(560px, 80vh, 820px);
  padding: calc(var(--space-8) + var(--space-6)) 0 var(--space-6);
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

.page-products .products-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  z-index: 0;
}

.page-products .products-hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--overlay-scrim);
}

.page-products .products-hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
}

.page-products .products-hero__crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
}

.page-products .products-hero__crumbs a {
  color: var(--color-contrast-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
}

.page-products .products-hero__crumbs a:hover,
.page-products .products-hero__crumbs a:focus-visible {
  border-bottom-color: var(--color-contrast-accent);
}

.page-products .products-hero__sep {
  opacity: 0.6;
}

.page-products .products-hero__eyebrow {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.page-products .products-hero__title {
  margin: 0 0 var(--space-4);
  max-width: 11em;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.04;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-products .products-hero__lede {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-products .products-hero__figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-products .hero-figure__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-products .hero-figure__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  line-height: 1.4;
  color: var(--color-contrast-ink);
}

@media (min-width: 768px) {
  .page-products .hero-figure__label {
    font-size: var(--text-sm);
  }
}

/* ============ 项目索引 ============ */

.page-products .products-index {
  padding: var(--section-y) 0;
  background: var(--color-surface);
}

.page-products .products-index__head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.page-products .products-index__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-products .products-index__lede {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-products .products-index__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

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

@media (min-width: 1024px) {
  .page-products .products-index__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
  }
}

.page-products .products-index__item a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "num count"
    "name name"
    "hint hint";
  gap: var(--space-2);
  align-content: start;
  height: 100%;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  color: var(--color-ink);
  text-decoration: none;
  box-shadow: var(--shadow-1);
  transition: transform 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.page-products .products-index__item a:hover,
.page-products .products-index__item a:focus-visible {
  transform: translateY(-4px);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-2);
}

.page-products .products-index__num {
  grid-area: num;
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-products .products-index__name {
  grid-area: name;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-products .products-index__hint {
  grid-area: hint;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-products .products-index__count {
  grid-area: count;
  align-self: start;
  padding: 2px var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-highlight);
  color: var(--color-ink);
  font-size: var(--text-xs);
  white-space: nowrap;
}

.page-products .products-metrics {
  position: relative;
  margin-top: var(--space-8);
  padding-top: var(--space-4);
}

.page-products .products-metrics::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-line) 0 10px,
    transparent 10px 18px
  );
}

.page-products .products-metrics__label {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

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

.page-products .products-metrics__list li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-products .products-metrics__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

/* ============ 筛选条 ============ */

.page-products .products-filter-section {
  padding: 0 0 var(--space-6);
  background: var(--color-surface);
}

.page-products .products-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.page-products .products-filter__chip {
  padding: var(--space-2) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.page-products .products-filter__chip:hover {
  background: var(--color-highlight);
  color: var(--color-ink);
}

.page-products .products-filter__chip[aria-pressed="true"] {
  background: var(--color-primary-soft);
  border-color: var(--color-focus);
  color: var(--color-ink);
  font-weight: var(--weight-heading);
}

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

.page-products .products-filter__status {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ============ 分组区块 ============ */

.page-products .products-group {
  padding: calc(var(--section-y) * 0.72) 0;
}

@media (min-width: 768px) {
  .page-products .products-group {
    padding: var(--section-y) 0;
  }
}

.page-products .products-group--a {
  background: var(--color-surface);
}

.page-products .products-group--b {
  background: var(--color-surface-alt);
}

.page-products .products-group--c {
  background: var(--color-surface-deep);
}

.page-products .products-group--d {
  background: var(--color-surface);
}

.page-products .products-group__head {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-left: var(--space-4);
}

.page-products .products-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35em;
  bottom: 0.35em;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}

@media (min-width: 768px) {
  .page-products .products-group__head {
    grid-template-columns: auto minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--space-4);
    padding-left: var(--space-6);
  }
}

.page-products .products-group__num {
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-primary);
}

.page-products .products-group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

@media (min-width: 768px) {
  .page-products .products-group__title {
    font-size: var(--text-3xl);
  }
}

.page-products .products-group__lede {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-products .products-group__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .page-products .products-group__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: var(--space-6);
    align-items: start;
  }
}

.page-products .products-group__side {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

/* ============ 项目卡 ============ */

.page-products .proj-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-products .proj-card--media {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 440px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-1);
}

@media (min-width: 900px) {
  .page-products .proj-card--media {
    min-height: 520px;
  }
}

.page-products .proj-card--media .media__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center;
}

.page-products .proj-card--media .media__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-products .proj-card--media .media__body {
  position: relative;
  width: 100%;
  padding: var(--space-4);
}

@media (min-width: 768px) {
  .page-products .proj-card--media .media__body {
    padding: var(--space-6);
  }
}

.page-products .proj-card__body > * + * {
  margin-top: var(--space-3);
}

.page-products .proj-card__kicker {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-products .proj-card__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

@media (min-width: 768px) {
  .page-products .proj-card--media .proj-card__title {
    font-size: var(--text-3xl);
  }
}

.page-products .proj-card__desc {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-products .proj-card--media .proj-card__desc {
  color: var(--color-contrast-ink);
}

.page-products .proj-card__basis {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
}

.page-products .proj-card--media .proj-card__basis {
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

@media (hover: hover) {
  .page-products .proj-card--media .proj-card__basis {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    opacity: 0;
    overflow: hidden;
    transition: max-height 180ms ease, opacity 180ms ease, margin-top 180ms ease,
      padding-top 180ms ease, border-color 180ms ease;
  }

  .page-products .proj-card--media:hover .proj-card__basis,
  .page-products .proj-card--media:focus-within .proj-card__basis {
    max-height: 12em;
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top-color: var(--color-contrast-line);
    opacity: 1;
  }
}

/* 浅色小卡 */

.page-products .proj-card--plain {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-products .proj-card--plain .proj-card__kicker {
  color: var(--color-accent);
}

.page-products .proj-card--plain .proj-card__title {
  font-size: var(--text-xl);
  color: var(--color-ink);
}

.page-products .proj-card--plain .proj-card__desc {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-products .proj-card--plain .proj-card__basis {
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-muted);
}

@media (hover: hover) {
  .page-products .proj-card--plain .proj-card__basis {
    max-height: 0;
    margin: 0;
    padding-top: 0;
    border-top-color: transparent;
    opacity: 0;
    overflow: hidden;
    transition: max-height 180ms ease, opacity 180ms ease, padding-top 180ms ease,
      border-color 180ms ease;
  }

  .page-products .proj-card--plain:hover .proj-card__basis,
  .page-products .proj-card--plain:focus-within .proj-card__basis {
    max-height: 12em;
    padding-top: var(--space-3);
    border-top-color: var(--color-line);
    opacity: 1;
  }
}

/* 元信息 */

.page-products .proj-meta {
  display: grid;
  gap: var(--space-2);
  margin: 0;
}

.page-products .proj-meta__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
}

@media (min-width: 560px) {
  .page-products .proj-meta__row {
    grid-template-columns: 6em minmax(0, 1fr);
    gap: var(--space-2);
    align-items: baseline;
  }
}

.page-products .proj-meta__key {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.page-products .proj-card--media .proj-meta__key {
  color: var(--color-contrast-accent);
}

.page-products .proj-meta__val {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.5;
}

.page-products .proj-card--plain .proj-meta__val {
  color: var(--color-ink-soft);
}

.page-products .proj-card--media .proj-meta__val {
  color: var(--color-contrast-ink);
}

.page-products .proj-meta__note {
  font-size: var(--text-xs);
  color: inherit;
  opacity: 0.85;
}

.page-products .cadence-bar {
  display: inline-block;
  width: 76px;
  height: 6px;
  border-radius: var(--radius-pill);
  background: repeating-linear-gradient(
    90deg,
    var(--color-accent) 0 5px,
    transparent 5px 10px
  );
}

.page-products .proj-card--media .cadence-bar {
  background: repeating-linear-gradient(
    90deg,
    var(--color-contrast-accent) 0 5px,
    transparent 5px 10px
  );
}

/* 旁注 */

.page-products .proj-note {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-primary-soft);
  color: var(--color-ink);
  box-shadow: var(--shadow-1);
}

.page-products .proj-note__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-products .proj-note p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-products .proj-note a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
}

.page-products .proj-note a:hover,
.page-products .proj-note a:focus-visible {
  color: var(--color-ink);
  border-bottom-color: var(--color-ink);
}

/* ============ 出口 ============ */

.page-products .products-exit {
  padding: calc(var(--section-y) * 0.8) 0 var(--section-y);
  background: var(--color-surface-alt);
}

.page-products .products-exit__eyebrow {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-products .products-exit__title {
  margin: 0 0 var(--space-6);
  max-width: var(--measure);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

@media (min-width: 768px) {
  .page-products .products-exit__title {
    font-size: var(--text-3xl);
  }
}

.page-products .products-exit__routes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .page-products .products-exit__routes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }
}

.page-products .exit-route {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  height: 100%;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
  text-decoration: none;
  box-shadow: var(--shadow-1);
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.page-products .exit-route:hover,
.page-products .exit-route:focus-visible {
  transform: translateY(-4px);
  background: var(--color-highlight);
  box-shadow: var(--shadow-2);
}

.page-products .exit-route__num {
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-products .exit-route__name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-products .exit-route__desc {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-products .products-exit__help {
  margin: var(--space-6) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-products .products-exit__help a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
}

.page-products .products-exit__help a:hover,
.page-products .products-exit__help a:focus-visible {
  color: var(--color-ink);
  border-bottom-color: var(--color-ink);
}

/* ============ 动效 ============ */

.page-products [data-reveal] {
  transition: opacity 320ms ease, transform 320ms ease;
}

.page-products [data-reveal].reveal {
  opacity: 0;
  transform: translateY(12px);
}

.page-products [data-reveal].reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-products [data-reveal],
  .page-products [data-reveal].reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-products .products-index__item a,
  .page-products .exit-route {
    transition: none;
  }
}

/* ============ 命中态 ============ */

.page-products [data-filter-item].is-hidden,
.page-products [data-filter-item][hidden] {
  display: none;
}
<<<END>>>