.page-products {
  --pp-gap: clamp(1rem, 2.4vw, 1.75rem);
  --pp-pad: clamp(2.25rem, 5vw, 4.5rem);
  font-family: var(--font-sans);
  color: var(--space);
  background-color: var(--snow);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  overflow-x: hidden;
}

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

.page-products .mono-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--char);
}

.page-products .section {
  padding: var(--pp-pad) 0;
}

.page-products .section__title {
  margin: 0.4rem 0 0.75rem;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
  font-weight: 900;
}

.page-products .section__note {
  margin: 0;
  max-width: 70ch;
  color: var(--char);
  line-height: 1.8;
}

.page-products .section--ice {
  background: linear-gradient(180deg, rgba(143, 216, 255, 0.38), rgba(247, 251, 255, 0.94));
  border-top: var(--bw) solid var(--space);
  border-bottom: var(--bw) solid var(--space);
}

.page-products .section--deep {
  background: var(--deepice);
  color: var(--snow);
  border-top: var(--bw) solid var(--space);
  border-bottom: var(--bw) solid var(--space);
}

.page-products .section--deep .section__title,
.page-products .section--deep .section__note {
  color: var(--snow);
}

.page-products .section--deep .section__note {
  color: rgba(247, 251, 255, 0.82);
}

.page-products .section--deep .eyebrow {
  color: var(--aurora);
}

/* ---------- 首屏 ---------- */
.page-products .hero {
  border-bottom: var(--bw) solid var(--space);
  background:
    radial-gradient(1100px 500px at 88% -12%, rgba(94, 234, 212, 0.3), transparent 64%),
    linear-gradient(158deg, var(--ice) 0%, #DFF1FF 44%, var(--snow) 80%);
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(2rem, 5vw, 3.5rem);
}

.page-products .hero__grid {
  display: grid;
  gap: var(--pp-gap);
  align-items: start;
}

.page-products .hero h1 {
  margin: 0.55rem 0 0.9rem;
  font-size: clamp(1.85rem, 5.2vw, 3.35rem);
  line-height: 1.14;
  letter-spacing: 0.02em;
  font-weight: 900;
}

.page-products .hero__intro {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.85;
  color: var(--char);
}

.page-products .hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

.page-products .index-panel {
  margin-top: 1.75rem;
  padding: 0.9rem 1rem 1rem;
  border: var(--bw) solid var(--space);
  background: rgba(247, 251, 255, 0.88);
  box-shadow: var(--shadow-hard);
}

.page-products .index-list {
  list-style: none;
  margin: 0.55rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.page-products .index-list a {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  padding: 0.45rem 0.6rem;
  color: var(--space);
  text-decoration: none;
  font-size: 0.9375rem;
  border-left: 3px solid var(--ice);
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.page-products .index-list a:hover,
.page-products .index-list a:focus-visible {
  background: var(--ice-soft);
  border-left-color: var(--orange);
  transform: translateX(2px);
}

.page-products .index-list__idx {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-products .hero__stage {
  display: grid;
  gap: 1rem;
}

.page-products .stage-frame {
  margin: 0;
  border: var(--bw) solid var(--space);
  background: var(--deepice);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-products .stage-frame img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-products .stage-frame__cap {
  padding: 0.7rem 0.9rem;
  border-top: 2px solid var(--space);
  background: var(--deepice);
  color: var(--ice);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.page-products .stage-meta {
  border: 2px solid var(--space);
  background: var(--snow);
  display: grid;
}

.page-products .stage-meta__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px dashed var(--silver);
  font-size: 0.875rem;
}

.page-products .stage-meta__row:last-child {
  border-bottom: 0;
}

.page-products .stage-meta__row strong {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.03em;
  color: var(--deepice);
}

/* ---------- 三组入口 ---------- */
.page-products .matrix__grid {
  display: grid;
  gap: var(--pp-gap);
  margin-top: 1.75rem;
}

.page-products .entry-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.25rem 1.15rem 1.55rem;
  border: var(--bw) solid var(--space);
  background: var(--snow);
  box-shadow: var(--shadow-hard);
}

.page-products .entry-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 8px;
  background: var(--ice);
}

.page-products .entry-card--mobile::after {
  background: var(--orange);
}

.page-products .entry-card--ops::after {
  background: var(--aurora);
}

.page-products .entry-card__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--deepice);
}

.page-products .entry-card__name {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.page-products .entry-card__desc {
  margin: 0;
  color: var(--char);
  font-size: 0.9375rem;
  line-height: 1.78;
}

.page-products .entry-card__list {
  margin: 0.25rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--char);
}

.page-products .entry-card__list li {
  position: relative;
  padding-left: 1.1rem;
}

.page-products .entry-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.5rem;
  height: 2px;
  background: var(--orange);
}

/* ---------- 桌面端能力 + 筛选 ---------- */
.page-products .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 0.6rem;
}

.page-products .chip {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  padding: 0.45rem 0.85rem;
  border: 2px solid var(--space);
  background: var(--snow);
  color: var(--space);
  cursor: pointer;
  transition: background 0.16s ease, box-shadow 0.16s ease, color 0.16s ease;
}

.page-products .chip:hover,
.page-products .chip:focus-visible {
  background: var(--ice-soft);
}

.page-products .chip[aria-pressed="true"] {
  background: var(--aurora);
  box-shadow: 3px 3px 0 var(--space);
}

.page-products .filter-status {
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--char);
}

.page-products .core__grid {
  display: grid;
  gap: var(--pp-gap);
}

.page-products .core-item {
  padding: 1rem 1.1rem 1.15rem;
  border: 2px solid var(--space);
  background: var(--snow);
  box-shadow: 4px 4px 0 var(--silver);
}

.page-products .core-item__idx {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-products .core-item h3 {
  margin: 0 0 0.45rem;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-products .core-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--char);
}

.page-products .filter-empty {
  margin: 1.25rem 0 0;
  padding: 1rem 1.1rem;
  border: 2px dashed var(--deepice);
  background: var(--snow);
  font-size: 0.9375rem;
  color: var(--char);
}

/* ---------- 内容专区横向轨道 ---------- */
.page-products .rail-wrap {
  margin-top: 1.5rem;
  padding: 1.25rem 0 1.5rem;
  border-top: 2px solid var(--space);
  border-bottom: 2px solid var(--space);
  background: var(--deepice);
}

.page-products .rail-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
}

.page-products .rail-head .mono-label {
  color: var(--ice);
}

.page-products .rail-hint {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--silver);
}

.page-products .rail {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0 clamp(1rem, 3vw, 2.25rem) 0.75rem;
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding-left: clamp(1rem, 3vw, 2.25rem);
  -webkit-overflow-scrolling: touch;
}

.page-products .rail::-webkit-scrollbar {
  height: 8px;
}

.page-products .rail::-webkit-scrollbar-track {
  background: rgba(247, 251, 255, 0.12);
}

.page-products .rail::-webkit-scrollbar-thumb {
  background: var(--orange);
}

.page-products .rail-card {
  flex: 0 0 min(76vw, 290px);
  scroll-snap-align: start;
  padding: 1rem 1rem 1.15rem;
  border: var(--bw) solid var(--ice);
  background: var(--snow);
  color: var(--space);
  box-shadow: 6px 6px 0 rgba(10, 27, 46, 0.55);
}

.page-products .rail-card__no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-products .rail-card h3 {
  margin: 0.35rem 0 0.4rem;
  font-size: 1.125rem;
  line-height: 1.35;
}

.page-products .rail-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--char);
}

.page-products .zone-figure {
  margin: 1.75rem 0 0;
  border: var(--bw) solid var(--space);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-products .zone-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 场馆工具与移动端 ---------- */
.page-products .duo {
  display: grid;
  gap: var(--pp-gap);
  align-items: center;
  padding: 1.5rem 0;
  border-bottom: 1px dashed rgba(199, 215, 229, 0.35);
}

.page-products .duo:first-of-type {
  margin-top: 1rem;
}

.page-products .duo:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-products .duo__media {
  margin: 0;
  border: var(--bw) solid var(--ice);
  overflow: hidden;
  box-shadow: 6px 6px 0 rgba(10, 27, 46, 0.5);
}

.page-products .duo__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-products .duo__body h3 {
  margin: 0 0 0.6rem;
  font-size: 1.35rem;
  line-height: 1.3;
  color: var(--snow);
}

.page-products .duo__body p {
  margin: 0;
  color: rgba(247, 251, 255, 0.86);
  line-height: 1.85;
  font-size: 0.9375rem;
}

.page-products .fold {
  margin-top: 1.1rem;
  border: 2px solid var(--ice);
  background: rgba(247, 251, 255, 0.06);
}

.page-products .fold summary {
  cursor: pointer;
  padding: 0.7rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--aurora);
  list-style: none;
}

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

.page-products .fold summary::before {
  content: "＋";
  display: inline-block;
  margin-right: 0.5rem;
  color: var(--orange);
}

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

.page-products .fold__body {
  padding: 0 0.9rem 0.9rem;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(247, 251, 255, 0.85);
}

.page-products .fold__body ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.35rem;
}

/* ---------- 订阅与反馈 ---------- */
.page-products .feedback__grid {
  display: grid;
  gap: var(--pp-gap);
  margin-top: 1.75rem;
}

.page-products .panel {
  padding: 1.25rem 1.2rem 1.4rem;
  border: var(--bw) solid var(--space);
  box-shadow: var(--shadow-hard);
}

.page-products .panel h3 {
  margin: 0.45rem 0 0.6rem;
  font-size: 1.1875rem;
  line-height: 1.35;
}

.page-products .panel p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--char);
}

.page-products .panel--ice {
  background: var(--ice-soft);
}

.page-products .panel--paper {
  background: var(--paper);
}

.page-products .panel .btn {
  margin-top: 1.1rem;
}

/* ---------- 版本路线 ---------- */
.page-products .timeline {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: var(--pp-gap);
}

.page-products .timeline__item {
  padding: 1rem 1.1rem 1.2rem;
  border: 2px solid var(--space);
  background: var(--snow);
  box-shadow: 5px 5px 0 var(--silver);
}

.page-products .timeline__ver {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-products .timeline__item h3 {
  margin: 0 0 0.45rem;
  font-size: 1.125rem;
}

.page-products .timeline__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--char);
}

.page-products .version-figure {
  margin: 1.75rem 0 0;
  border: var(--bw) solid var(--space);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: var(--snow);
}

.page-products .version-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-products .version-figure figcaption {
  padding: 0.65rem 0.9rem;
  border-top: 2px solid var(--space);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--deepice);
}

/* ---------- 使用场景 ---------- */
.page-products .scenarios {
  display: grid;
  gap: var(--pp-gap);
  margin-top: 1.75rem;
}

.page-products .scenario {
  padding: 1.1rem 1.1rem 1.25rem;
  border: 2px solid var(--space);
  border-left: 8px solid var(--orange);
  background: var(--snow);
}

.page-products .scenario:nth-child(even) {
  border-left-color: var(--deepice);
}

.page-products .scenario h3 {
  margin: 0 0 0.45rem;
  font-size: 1.0625rem;
}

.page-products .scenario p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--char);
}

/* ---------- 结尾 ---------- */
.page-products .closing {
  border-top: 6px solid var(--orange);
  background: var(--space);
  color: var(--snow);
  padding: clamp(2rem, 5vw, 3.75rem) 0;
}

.page-products .closing__inner {
  display: grid;
  gap: 0.9rem;
}

.page-products .closing h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: 0.02em;
}

.page-products .closing p {
  margin: 0;
  max-width: 62ch;
  line-height: 1.85;
  color: rgba(247, 251, 255, 0.82);
}

.page-products .closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-products .index-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

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

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

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

@media (min-width: 900px) {
  .page-products .hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(1.5rem, 3vw, 3rem);
  }

  .page-products .duo {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(1.5rem, 3vw, 2.75rem);
  }

  .page-products .duo--reverse .duo__media {
    order: 2;
  }

  .page-products .timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .rail-card {
    flex-basis: 320px;
  }
}

@media (min-width: 1080px) {
  .page-products .matrix__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .scenarios {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .index-list a,
  .page-products .chip {
    transition: none;
  }

  .page-products .index-list a:hover,
  .page-products .index-list a:focus-visible {
    transform: none;
  }
}