/* ============================================================
   案例矩阵 /solutions/ 页面专属样式
   作用域：.page-solutions
   ============================================================ */

.page-solutions .hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--color-surface);
  border-bottom: var(--border-thick) solid var(--color-ink);
  padding-block: var(--space-4) var(--section-y-lg);
}

.page-solutions .hero-blob {
  position: absolute;
  z-index: 0;
  pointer-events: none;
}

.page-solutions .hero-blob--a {
  top: calc(var(--space-8) * -1);
  right: calc(var(--space-6) * -1);
  width: calc(var(--space-8) * 3);
  height: calc(var(--space-8) * 3);
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  border: var(--border-thick) solid var(--color-primary);
}

.page-solutions .hero-blob--b {
  bottom: var(--space-6);
  left: calc(var(--space-6) * -1);
  width: calc(var(--space-8) * 2);
  height: var(--space-4);
  background: var(--color-highlight);
  border-radius: var(--radius-sm);
  transform: rotate(-7deg);
}

.page-solutions .hero .container {
  position: relative;
  z-index: 1;
}

.page-solutions .breadcrumb {
  margin-bottom: var(--space-4);
}

.page-solutions .hero-inner {
  display: grid;
  gap: var(--space-6);
}

.page-solutions .hero-lead {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: flex-start;
}

.page-solutions .hero-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
}

.page-solutions .hero-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 900;
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-solutions .hero-sub {
  margin: 0;
  max-width: 46ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-solutions .hero-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-solutions .tile {
  grid-column: span 2;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
}

.page-solutions .tile--total {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-solutions .tile--page {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-solutions .tile-num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-solutions .tile-label {
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}

.page-solutions .tile-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-solutions .tile-chip {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-solutions .tile-chip-code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-solutions .tile-chip strong {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

/* ---------- 分组刻度 ---------- */

.page-solutions .overview-band {
  padding-block: var(--section-y);
}

.page-solutions .overview {
  display: grid;
  gap: var(--space-6);
}

.page-solutions .overview-text {
  display: grid;
  gap: var(--space-2);
}

.page-solutions .overview-text .prose {
  margin: 0;
  color: var(--color-ink-soft);
}

.page-solutions .overview-text a {
  color: var(--color-ink);
  text-decoration-color: var(--color-primary);
  text-decoration-thickness: 3px;
  text-underline-offset: 3px;
}

.page-solutions .scale {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-solutions .scale-item {
  display: grid;
  gap: var(--space-1);
}

.page-solutions .scale-link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-ink);
}

.page-solutions .scale-code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.12em;
  padding: 0 var(--space-1);
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-solutions .scale-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
}

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

.page-solutions .scale-link:hover .scale-name,
.page-solutions .scale-link:focus-visible .scale-name {
  text-decoration: underline;
  text-decoration-color: var(--color-primary);
  text-decoration-thickness: 3px;
  text-underline-offset: 3px;
}

.page-solutions .scale-track {
  display: block;
  height: var(--space-2);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
  overflow: hidden;
}

.page-solutions .scale-fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--color-primary);
}

.page-solutions .scale-item:nth-child(1) .scale-fill { width: 30%; }
.page-solutions .scale-item:nth-child(2) .scale-fill { width: 30%; background: var(--color-accent); }
.page-solutions .scale-item:nth-child(3) .scale-fill { width: 20%; }
.page-solutions .scale-item:nth-child(4) .scale-fill { width: 20%; background: var(--color-accent); }

/* ---------- 矩阵组 ---------- */

.page-solutions .matrix-band {
  padding-block: var(--section-y);
}

.page-solutions .group-head {
  position: sticky;
  top: calc(var(--space-6) + var(--space-4));
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  padding-block: var(--space-2);
  margin-bottom: var(--space-4);
  background: var(--color-surface);
  box-shadow: 0 var(--space-2) 0 var(--color-surface);
  border-bottom: var(--border-thick) solid var(--color-primary);
}

.page-solutions .band--alt .group-head {
  background: var(--color-surface-alt);
  box-shadow: 0 var(--space-2) 0 var(--color-surface-alt);
}

.page-solutions .band--tint .group-head {
  background: var(--color-primary-soft);
  box-shadow: 0 var(--space-2) 0 var(--color-primary-soft);
  border-bottom-color: var(--color-accent);
}

.page-solutions .band--contrast .group-head {
  background: var(--color-contrast-surface);
  box-shadow: 0 var(--space-2) 0 var(--color-contrast-surface);
  border-bottom-color: var(--color-contrast-accent);
}

.page-solutions .group-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: calc(var(--space-6) + var(--space-2));
  padding: var(--space-1) var(--space-2);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.1em;
  box-shadow: var(--shadow-1);
}

.page-solutions .band--contrast .group-code {
  background: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
  border-color: var(--color-contrast-accent);
}

.page-solutions .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);
}

.page-solutions .band--contrast .group-title {
  color: var(--color-contrast-ink);
}

.page-solutions .group-meta {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.page-solutions .band--contrast .group-meta {
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-solutions .group-body {
  display: grid;
  gap: var(--space-4);
}

.page-solutions .group-figure {
  margin: 0;
}

.page-solutions .group-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  background: var(--color-surface-deep);
}

.page-solutions .group-cap {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-solutions .band--contrast .group-cap {
  color: var(--color-contrast-ink);
  opacity: 0.7;
}

.page-solutions .entry-list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-solutions .entry {
  padding: var(--space-3);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.page-solutions .entry:hover,
.page-solutions .entry:focus-within {
  transform: translate(calc(var(--space-1) * -0.5), calc(var(--space-1) * -0.5));
  box-shadow: var(--shadow-2);
  border-color: var(--color-primary);
}

.page-solutions .entry-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.page-solutions .entry-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-solutions .entry-title {
  margin: var(--space-2) 0 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-solutions .entry-structure {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-solutions .entry-label {
  display: inline-block;
  margin-right: var(--space-1);
  padding: 0 var(--space-1);
  border-radius: var(--radius-sm);
  background: var(--color-highlight);
  color: var(--color-ink);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
}

.page-solutions .entry-points {
  display: grid;
  gap: var(--space-1);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}

.page-solutions .entry-points li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-solutions .entry-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: var(--space-1);
  height: var(--space-1);
  background: var(--color-primary);
}

.page-solutions .band--tint .entry-points li::before {
  background: var(--color-accent);
}

.page-solutions .group-extra {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-thick) solid var(--color-line);
}

.page-solutions .band--contrast .group-extra {
  border-top-color: var(--color-contrast-line);
}

.page-solutions .group-extra summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-solutions .band--contrast .group-extra summary {
  color: var(--color-contrast-ink);
}

.page-solutions .group-extra summary::-webkit-details-marker {
  display: none;
}

.page-solutions .group-extra summary::before {
  content: "＋";
  display: inline-block;
  margin-right: var(--space-1);
  color: var(--color-primary);
  font-weight: 900;
}

.page-solutions .group-extra[open] summary::before {
  content: "－";
}

.page-solutions .extra-points {
  display: grid;
  gap: var(--space-1);
  margin: var(--space-2) 0 0;
  padding-left: var(--space-3);
}

.page-solutions .extra-points li {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-solutions .band--contrast .extra-points li {
  color: var(--color-contrast-ink);
  opacity: 0.85;
}

.page-solutions .extra-points a {
  color: inherit;
  text-decoration-color: var(--color-primary);
  text-decoration-thickness: 3px;
  text-underline-offset: 3px;
}

/* ---------- 跨组对照 ---------- */

.page-solutions .compare-band {
  padding-block: var(--section-y-lg);
}

.page-solutions .compare-head {
  margin-bottom: var(--space-4);
}

.page-solutions .compare-figure {
  margin: 0 0 var(--space-6);
}

.page-solutions .compare-img {
  aspect-ratio: 25 / 14;
}

.page-solutions .compare-list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-solutions .compare-item {
  padding: var(--space-3);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
}

.page-solutions .compare-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-solutions .compare-title::after {
  content: "";
  display: block;
  width: var(--space-6);
  margin-top: var(--space-1);
  border-bottom: var(--border-thick) solid var(--color-primary);
}

.page-solutions .compare-item p {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-solutions .compare-note {
  margin: var(--space-4) 0 0;
  padding: var(--space-3);
  border-left: var(--border-thick) solid var(--color-accent);
  background: var(--color-highlight);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-solutions .compare-note a {
  color: var(--color-ink);
  text-decoration-color: var(--color-primary);
  text-decoration-thickness: 3px;
  text-underline-offset: 3px;
}

/* ---------- 收尾入口 ---------- */

.page-solutions .next-band {
  padding-block: var(--section-y);
}

.page-solutions .next-band .prose {
  margin: var(--space-2) 0 var(--space-4);
  color: var(--color-ink-soft);
}

.page-solutions .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-solutions .hero-board {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-solutions .tile-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-solutions .tile-chip:nth-child(odd) {
    transform: translateY(calc(var(--space-2) * -1)) rotate(-1deg);
  }

  .page-solutions .tile-chip:nth-child(even) {
    transform: translateY(var(--space-1)) rotate(1.2deg);
  }

  .page-solutions .compare-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-solutions .compare-item:nth-child(even) {
    transform: translateY(var(--space-2));
  }
}

@media (min-width: 900px) {
  .page-solutions .hero {
    padding-block: var(--space-6) var(--section-y-lg);
  }

  .page-solutions .hero-inner {
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: var(--gutter);
    align-items: end;
  }

  .page-solutions .hero-lead {
    grid-column: 1 / span 2;
  }

  .page-solutions .hero-title {
    writing-mode: vertical-rl;
  }

  .page-solutions .hero-board {
    grid-column: 3 / span 5;
  }

  .page-solutions .overview {
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: var(--gutter);
    align-items: start;
  }

  .page-solutions .overview-text {
    grid-column: 1 / span 3;
  }

  .page-solutions .scale {
    grid-column: 4 / span 4;
    gap: var(--space-4);
  }

  .page-solutions .group-body {
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: var(--gutter);
    align-items: start;
  }

  .page-solutions .group-figure {
    grid-column: 1 / span 3;
    grid-row: 1;
  }

  .page-solutions .entry-list {
    grid-column: 4 / span 4;
    grid-row: 1;
  }

  .page-solutions .group-body--flip .group-figure {
    grid-column: 5 / span 3;
  }

  .page-solutions .group-body--flip .entry-list {
    grid-column: 1 / span 4;
  }

  .page-solutions .compare-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-solutions .compare-item:nth-child(3n) {
    transform: translateY(var(--space-4));
  }
}