.page-solutions {
  --sol-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --sol-cell-pad: var(--space-3);
}

/* ---------- 面包屑上下文 ---------- */
.page-solutions .crumb {
  padding-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.01em;
}
.page-solutions .crumb a {
  color: var(--color-primary);
  text-decoration: none;
}
.page-solutions .crumb a:hover {
  text-decoration: underline;
}
.page-solutions .crumb-sep {
  margin: 0 var(--space-1);
  color: var(--color-ink-muted);
}

/* ---------- 通用区块调整 ---------- */
.page-solutions .eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}
.page-solutions .section h2 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
  max-width: 30ch;
}

/* ---------- 首屏 ---------- */
.page-solutions .sec-hero {
  padding-top: var(--space-6);
  padding-bottom: var(--section-y-lg);
}
.page-solutions .hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}
.page-solutions .hero-copy h1 {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
}
.page-solutions .hero-lede {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
  max-width: 42ch;
}

.page-solutions .hero-nums {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
  padding-bottom: var(--space-4);
}
.page-solutions .num-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.page-solutions .num-figure {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: var(--weight-heading);
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: var(--color-primary);
}
.page-solutions .num-lg {
  font-size: var(--text-figure);
}
.page-solutions .num-md {
  font-size: var(--text-4xl);
  color: var(--color-accent);
}
.page-solutions .num-sm {
  font-size: var(--text-2xl);
  color: var(--color-ink-soft);
}
.page-solutions .num-label {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-solutions .scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}
.page-solutions .scene-list li {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  gap: var(--space-2) var(--space-4);
  align-items: baseline;
  padding: var(--space-2) 0;
}
.page-solutions .scene-key {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.page-solutions .scene-key::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--color-primary);
  vertical-align: middle;
  margin-right: var(--space-1);
}
.page-solutions .scene-desc {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

/* ---------- 首屏索引矩阵 ---------- */
.page-solutions .hero-matrix {
  position: relative;
  isolation: isolate;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-contrast-surface);
  min-height: 460px;
}
.page-solutions .hero-matrix-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-solutions .hero-matrix-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}
.page-solutions .hero-matrix::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--overlay-scrim);
  pointer-events: none;
}
.page-solutions .matrix-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(4, minmax(0, 1fr));
  min-height: 460px;
}
.page-solutions .matrix-cell {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--sol-cell-pad);
  border-right: var(--border-thin) solid var(--color-contrast-line);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  overflow: hidden;
  transition: background-color 160ms var(--sol-ease);
}
.page-solutions .matrix-cell:nth-child(2n) {
  border-right: 0;
}
.page-solutions .matrix-cell:nth-last-child(-n + 2) {
  border-bottom: 0;
}
.page-solutions .matrix-cell:hover,
.page-solutions .matrix-cell:focus-within {
  background: var(--color-contrast-line);
}
.page-solutions .matrix-cell:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: -2px;
}
.page-solutions .cell-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}
.page-solutions .cell-name {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  line-height: 1.35;
  color: var(--color-contrast-ink);
}
.page-solutions .cell-points {
  position: absolute;
  inset: auto 0 0 0;
  display: grid;
  gap: 2px;
  padding: var(--space-2) var(--sol-cell-pad);
  background: color-mix(in srgb, var(--color-contrast-surface) 94%, transparent);
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition: opacity 160ms var(--sol-ease), transform 160ms var(--sol-ease);
}
.page-solutions .cell-points span {
  font-size: var(--text-xs);
  line-height: 1.45;
  color: var(--color-contrast-ink);
}
.page-solutions .cell-points span::before {
  content: "·";
  margin-right: 6px;
  color: var(--color-contrast-accent);
}
.page-solutions .matrix-cell:hover .cell-points,
.page-solutions .matrix-cell:focus-within .cell-points {
  opacity: 1;
  transform: translateY(0);
}
@media (hover: none) {
  .page-solutions .cell-points {
    display: none;
  }
}

/* ---------- 四个场景分组 ---------- */
.page-solutions .sec-group {
  padding-top: var(--section-y);
  padding-bottom: var(--section-y);
}
.page-solutions .group-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  align-items: center;
}
.page-solutions .group-body h2 {
  max-width: 26ch;
}
.page-solutions .step-list {
  list-style: none;
  counter-reset: sol-step;
  margin: var(--space-4) 0 0;
  padding: 0;
}
.page-solutions .step-list li {
  counter-increment: sol-step;
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}
.page-solutions .step-list li:last-child {
  margin-bottom: 0;
}
.page-solutions .step-list li::before {
  content: counter(sol-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.22em;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  letter-spacing: 0.04em;
}
.page-solutions .step-list a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 42%, transparent);
}
.page-solutions .step-list a:hover {
  border-bottom-color: var(--color-primary);
}
.page-solutions .group-note {
  margin: var(--space-4) 0 0;
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  border-left: 2px solid var(--color-highlight);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
  max-width: 54ch;
}

.page-solutions .group-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
}
.page-solutions .group-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-solutions .group-figure figcaption {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  line-height: 1.55;
  color: var(--color-ink-muted);
  background: var(--color-surface);
}

.page-solutions .group-figure--calendar img { aspect-ratio: 16 / 10; }
.page-solutions .group-figure--tags img { aspect-ratio: 4 / 3; }
.page-solutions .group-figure--timeline img { aspect-ratio: 21 / 9; }
.page-solutions .group-figure--devices img { aspect-ratio: 3 / 2; }

.page-solutions .group-figure--timeline {
  border-left: 2px solid var(--color-contrast-accent);
}
.page-solutions .group-figure--devices {
  border-left: 2px solid var(--color-accent);
}

/* ---------- 方案对照表（深底） ---------- */
.page-solutions .sec-plan-map {
  padding-top: var(--section-y-lg);
  padding-bottom: var(--section-y-lg);
}
.page-solutions .sec-plan-map .eyebrow {
  color: var(--color-contrast-accent);
}
.page-solutions .sec-plan-map h2 {
  color: var(--color-contrast-ink);
  max-width: 20ch;
}
.page-solutions .plan-map-intro {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.78;
  margin: 0 0 var(--space-6);
  max-width: 54ch;
}
.page-solutions .plan-map {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-solutions .plan-map-row {
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}
.page-solutions .plan-map-row:first-child {
  border-top: var(--border-thin) solid var(--color-contrast-line);
}
.page-solutions .plan-map-row details > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  align-items: baseline;
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
}
.page-solutions .plan-map-row details > summary::-webkit-details-marker {
  display: none;
}
.page-solutions .plan-map-row details > summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
}
.page-solutions .pm-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}
.page-solutions .pm-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.3;
  color: var(--color-contrast-ink);
}
.page-solutions .pm-for {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}
.page-solutions .pm-dep {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
  opacity: 0.55;
  white-space: nowrap;
}
.page-solutions .pm-detail {
  padding: 0 0 var(--space-4) var(--space-6);
  max-width: 74ch;
}
.page-solutions .pm-detail p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}
.page-solutions .pm-detail .pm-boundary {
  margin: 0;
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-contrast-accent);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.7;
}

/* ---------- 边界与前提 ---------- */
.page-solutions .sec-limits {
  padding-top: var(--section-y);
  padding-bottom: var(--section-y-lg);
}
.page-solutions .limits-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6) var(--space-8);
}
.page-solutions .limit-card {
  padding: 0;
}
.page-solutions .limit-card h3 {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-solutions .limit-card p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-solutions .limit-card a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 42%, transparent);
}
.page-solutions .limit-card a:hover {
  border-bottom-color: var(--color-primary);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-solutions .limits-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-solutions .limits-grid > .limit-card:nth-child(1),
  .page-solutions .limits-grid > .limit-card:nth-child(6) {
    grid-column: span 2;
  }
}

@media (min-width: 960px) {
  .page-solutions .hero-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: start;
  }
  .page-solutions .hero-nums {
    gap: var(--space-6) var(--space-8);
  }
  .page-solutions .scene-list {
    gap: 0;
  }
  .page-solutions .group-row {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }
  .page-solutions .group-row--b {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .page-solutions .group-row--c {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: var(--space-6);
  }
  .page-solutions .group-row--d {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .page-solutions .group-row--b .group-body,
  .page-solutions .group-row--d .group-body {
    order: 2;
  }
  .page-solutions .group-row--b .group-figure,
  .page-solutions .group-row--d .group-figure {
    order: 1;
  }
  .page-solutions .group-row--c .group-figure {
    align-self: start;
    margin-top: var(--space-4);
  }
  .page-solutions .plan-map-row details > summary {
    grid-template-columns: 4ch minmax(0, 1.15fr) minmax(0, 1.6fr) minmax(0, 0.75fr);
    gap: var(--space-4);
    padding: var(--space-4) 0;
    align-items: center;
  }
  .page-solutions .pm-detail {
    padding-left: calc(4ch + var(--space-4));
    padding-bottom: var(--space-6);
  }
  .page-solutions .limits-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-solutions .limits-grid > .limit-card:nth-child(1),
  .page-solutions .limits-grid > .limit-card:nth-child(6) {
    grid-column: auto;
  }
  .page-solutions .limits-grid > .limit-card:nth-child(2),
  .page-solutions .limits-grid > .limit-card:nth-child(4) {
    margin-top: var(--space-4);
  }
}

@media (min-width: 1100px) {
  .page-solutions .hero-matrix,
  .page-solutions .matrix-grid {
    min-height: 520px;
  }
  .page-solutions .section h2 {
    font-size: var(--text-2xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-solutions .matrix-cell,
  .page-solutions .cell-points {
    transition: none;
  }
}