.page-solutions {
  --sol-tint: color-mix(in srgb, var(--color-primary) 8%, var(--color-surface));
}

/* ---------- 首屏 ---------- */

.page-solutions .sol-hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thick) solid var(--color-primary);
  padding: var(--space-8) 0 var(--space-6);
}

.page-solutions .sol-hero .breadcrumb {
  color: var(--color-contrast-ink);
  opacity: 0.72;
  margin: 0 0 var(--space-4);
}

.page-solutions .sol-hero .breadcrumb a {
  color: inherit;
}

.page-solutions .sol-hero__eyebrow {
  color: var(--color-contrast-accent);
  margin: 0 0 var(--space-2);
}

.page-solutions .sol-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-3);
  max-width: 22ch;
  text-wrap: balance;
}

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

.page-solutions .sol-figures {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: var(--space-4) 0 0;
  border-top: var(--border-thin) solid var(--color-contrast-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-2);
}

.page-solutions .sol-figure-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.page-solutions .sol-figure-num {
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--color-contrast-accent);
  display: block;
}

.page-solutions .sol-figure-label {
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

/* ---------- 图片 ---------- */

.page-solutions .sol-figure {
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-solutions .sol-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-solutions .sol-hero .sol-figure {
  border-color: var(--color-contrast-line);
  background: transparent;
}

.page-solutions .sol-figure--hero {
  margin-top: var(--space-6);
}

.page-solutions .sol-figure--band {
  margin: 0 0 var(--space-4);
}

.page-solutions .sol-figure .media-caption {
  padding: var(--space-1) var(--space-2) var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-solutions .sol-hero .sol-figure .media-caption {
  color: var(--color-contrast-ink);
  opacity: 0.7;
  background: var(--color-contrast-surface);
}

/* ---------- 目录 ---------- */

.page-solutions .sol-toc-wrap {
  background: var(--color-surface-alt);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-toc {
  padding: var(--space-4) 0;
}

.page-solutions .sol-toc .toc-title {
  font-family: var(--font-mono);
  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 .sol-toc .toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.page-solutions .sol-toc .toc-list a {
  display: block;
  padding: var(--space-1) var(--space-2);
  border-left: var(--border-thick) solid var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
}

.page-solutions .sol-toc .toc-list a:hover,
.page-solutions .sol-toc .toc-list a:focus-visible {
  border-left-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.page-solutions .sol-toc .toc-list a.is-current {
  border-left-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

/* ---------- 章节 ---------- */

.page-solutions .sol-group {
  padding: var(--section-y) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-group--alt {
  background: var(--color-surface-alt);
}

.page-solutions .sol-group--deep {
  background: var(--color-surface-deep);
  border-bottom: none;
}

.page-solutions .sol-head-text {
  max-width: var(--measure);
}

.page-solutions .sol-head-text .section-title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  margin: var(--space-1) 0 var(--space-2);
}

.page-solutions .sol-head-text .lede {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
}

.page-solutions .sol-head-row {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

/* ---------- 矩阵 ---------- */

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

.page-solutions .sol-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.page-solutions .sol-item:hover,
.page-solutions .sol-item:focus-within {
  border-color: var(--color-primary);
  background: var(--sol-tint);
}

.page-solutions .sol-item__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
  margin: 0;
}

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

.page-solutions .sol-item__desc {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
}

.page-solutions .sol-item__desc a,
.page-solutions .sol-fold .fold-body a,
.page-solutions .sol-tail a {
  color: var(--color-primary);
  text-underline-offset: 0.22em;
}

.page-solutions .sol-item__desc a:hover,
.page-solutions .sol-fold .fold-body a:hover,
.page-solutions .sol-tail a:hover {
  color: var(--color-accent);
}

.page-solutions .sol-meta {
  margin: 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-1) var(--space-2);
}

.page-solutions .sol-meta dt {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  margin: 0;
}

.page-solutions .sol-meta dd {
  font-size: var(--text-sm);
  color: var(--color-ink);
  margin: 0;
}

.page-solutions .sol-steps {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin: 0;
}

.page-solutions .sol-stepnum {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-primary);
}

.page-solutions .sol-stepunit {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

/* ---------- 折叠 ---------- */

.page-solutions .sol-fold {
  margin: 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-fold summary {
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  list-style: none;
}

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

.page-solutions .sol-fold summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--color-primary);
  margin-right: var(--space-1);
}

.page-solutions .sol-fold[open] summary::before {
  content: "−";
}

.page-solutions .sol-fold summary:hover {
  color: var(--color-primary);
}

.page-solutions .sol-fold .fold-body {
  padding-top: var(--space-1);
}

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

/* ---------- 路径轴 ---------- */

.page-solutions .sol-axis {
  margin: 0 0 var(--space-4);
}

.page-solutions .sol-axis-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
}

/* ---------- 标签切换 ---------- */

.page-solutions .sol-tabs {
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.page-solutions .sol-tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-tabs .tab-btn {
  flex: 1 1 auto;
  min-width: 0;
  padding: var(--space-2);
  border: none;
  border-right: var(--border-thin) solid var(--color-line);
  background: transparent;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  cursor: pointer;
  border-radius: 0;
}

.page-solutions .sol-tabs .tab-btn:last-child {
  border-right: none;
}

.page-solutions .sol-tabs .tab-btn:hover {
  background: var(--color-surface-alt);
  color: var(--color-primary);
}

.page-solutions .sol-tabs .tab-btn[aria-selected="true"] {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: var(--weight-heading);
}

.page-solutions .sol-tabs .tab-btn:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: -2px;
}

.page-solutions .sol-panel {
  padding: var(--space-2) var(--space-3) var(--space-1);
}

.page-solutions .sol-cond-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-solutions .sol-cond-list li {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-cond-list li:last-child {
  border-bottom: none;
}

.page-solutions .sol-cond-k {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.page-solutions .sol-cond-v {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

/* ---------- 要点框与收尾 ---------- */

.page-solutions .sol-notecards {
  display: grid;
  gap: var(--space-3);
}

.page-solutions .sol-note {
  margin: 0;
  border-left: var(--border-thick) solid var(--color-primary);
  background: var(--color-surface);
  padding: var(--space-3);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-solutions .sol-note .note-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-1);
}

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

.page-solutions .sol-tail {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-solutions .sol-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-solutions .sol-cond-list li {
    grid-template-columns: 9.5em minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-2);
  }
}

@media (min-width: 760px) {
  .page-solutions .sol-matrix--two,
  .page-solutions .sol-matrix--three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-solutions .sol-notecards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-solutions .sol-head-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-solutions .sol-head-row--flip .sol-head-text {
    order: 2;
  }

  .page-solutions .sol-head-row--flip .sol-figure {
    order: 1;
  }
}

@media (min-width: 1000px) {
  .page-solutions .sol-matrix--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-solutions .sol-group {
    padding: var(--section-y-lg) 0;
  }

  .page-solutions .sol-hero {
    padding-top: var(--section-y-lg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-solutions .sol-item {
    transition: none;
  }
}
<<<END>>>