.page-solutions {
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  letter-spacing: 0.01em;
  overflow-x: clip;
}

.page-solutions .sol-crumb {
  padding-top: var(--space-4);
  padding-bottom: var(--space-2);
}

/* ============ 首屏 ============ */
.page-solutions .sol-hero {
  padding-top: var(--space-4);
  padding-bottom: var(--space-8);
}

.page-solutions .sol-hero__head {
  max-width: 74ch;
  margin: 0 auto var(--space-6);
  text-align: center;
}

.page-solutions .sol-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.06;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

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

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

.page-solutions .sol-map {
  position: relative;
  margin: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-contrast-surface);
  overflow: hidden;
}

.page-solutions .sol-map__media {
  position: relative;
}

.page-solutions .sol-map__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-solutions .sol-map__overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(62%, 288px);
  padding: var(--space-3) var(--space-3) var(--space-8);
  background: color-mix(in srgb, var(--color-contrast-surface) 86%, transparent);
  border-left: 1px solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
  overflow-y: auto;
}

.page-solutions .sol-map__overlay-tag {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
  border-bottom: 1px solid var(--color-contrast-line);
  padding-bottom: var(--space-1);
}

.page-solutions .sol-map__overlay-list,
.page-solutions .sol-map__more-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.page-solutions .sol-map__overlay-list li,
.page-solutions .sol-map__more-list li {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr);
  gap: var(--space-1);
  font-size: var(--text-xs);
  line-height: 1.6;
  padding-bottom: var(--space-1);
  border-bottom: 1px solid var(--color-contrast-line);
}

.page-solutions .sol-map__overlay-list li span,
.page-solutions .sol-map__more-list li span {
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.page-solutions .sol-map__overlay-list li b,
.page-solutions .sol-map__more-list li b {
  font-weight: var(--weight-body);
  font-variant-numeric: tabular-nums;
}

.page-solutions .sol-map__more {
  margin-top: var(--space-2);
}

.page-solutions .sol-map__more summary {
  cursor: pointer;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
  padding: var(--space-1) 0;
  border-top: 1px solid var(--color-contrast-line);
  list-style: none;
}

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

.page-solutions .sol-map__more summary::before {
  content: "+ ";
}

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

.page-solutions .sol-map__more-list {
  margin-top: var(--space-1);
}

.page-solutions .sol-map__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 62%;
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  border-top: 1px solid var(--color-line);
  border-right: 1px solid var(--color-line);
  font-size: var(--text-xs);
  line-height: 1.55;
}

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

.page-solutions .sol-bigfig {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.page-solutions .sol-bigfig--accent {
  background: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

.page-solutions .sol-bigfig__num {
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
}

.page-solutions .sol-bigfig--accent .sol-bigfig__num {
  color: var(--color-contrast-accent);
}

.page-solutions .sol-bigfig__label {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.2;
}

.page-solutions .sol-bigfig__note {
  font-size: var(--text-xs);
  line-height: 1.55;
  color: var(--color-ink-muted);
}

.page-solutions .sol-bigfig--accent .sol-bigfig__note {
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, transparent);
}

/* ============ 方案横带 ============ */
.page-solutions .sol-plans {
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
  border-top: 3px double var(--color-line);
}

.page-solutions .sol-band-head {
  margin-bottom: var(--space-6);
}

.page-solutions .sol-band-head--center {
  text-align: center;
  max-width: 62ch;
  margin-left: auto;
  margin-right: auto;
}

.page-solutions .sol-band-head__title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: var(--space-2) 0 var(--space-2);
}

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

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

.page-solutions .sol-strip {
  border-top: 1px solid var(--color-line);
  padding: var(--space-6) 0;
}

.page-solutions .sol-strip:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-solutions .sol-strip__head {
  min-width: 0;
}

.page-solutions .sol-strip__meta {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
}

.page-solutions .sol-strip__title {
  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);
  margin: 0 0 var(--space-3);
}

.page-solutions .sol-strip__who {
  margin: 0;
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-primary);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-solutions .sol-strip__body {
  min-width: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-solutions .sol-strip__body > p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
}

.page-solutions .sol-steps {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
}

.page-solutions .sol-steps li {
  display: block;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.75;
}

.page-solutions .sol-steps li:first-child {
  border-top: 1px solid var(--color-line);
}

.page-solutions .sol-steps__k {
  display: inline-block;
  min-width: 4.2em;
  margin-right: var(--space-1);
  font-weight: var(--weight-heading);
  color: var(--color-accent);
}

.page-solutions .sol-startline {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
}

.page-solutions .sol-startline__mark {
  flex: 0 0 auto;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: 2px var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
}

.page-solutions .sol-strip__figure {
  margin: 0 0 var(--space-4);
  border: 1px solid var(--color-line);
  background: var(--color-surface-alt);
  padding: var(--space-1);
}

.page-solutions .sol-strip__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-solutions .sol-strip__figure figcaption {
  padding: var(--space-1) var(--space-1) 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.page-solutions .sol-tail {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink);
  text-decoration: none;
  font-size: var(--text-sm);
  line-height: 1.7;
  transition: background-color 240ms cubic-bezier(0.2, 0.7, 0.2, 1), color 240ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.page-solutions .sol-tail::after {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid var(--color-primary);
  opacity: 0.4;
  pointer-events: none;
}

.page-solutions .sol-tail__text {
  position: relative;
  z-index: 1;
}

.page-solutions .sol-tail__text b {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
}

.page-solutions .sol-tail__arrow {
  position: relative;
  z-index: 1;
  font-size: var(--text-lg);
  color: var(--color-primary);
  flex: 0 0 auto;
}

.page-solutions .sol-tail:hover,
.page-solutions .sol-tail:focus-visible {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-solutions .sol-tail:hover .sol-tail__arrow,
.page-solutions .sol-tail:focus-visible .sol-tail__arrow {
  color: var(--color-contrast-accent);
}

.page-solutions .sol-tail:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ============ 折线图 ============ */
.page-solutions .sol-chart {
  margin: 0 0 var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--color-line);
  background: var(--color-surface-alt);
}

.page-solutions .sol-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-solutions .sol-chart__grid {
  stroke: var(--color-line);
  stroke-width: 1;
}

.page-solutions .sol-chart__line {
  fill: none;
  stroke-width: 1.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-solutions .sol-chart__line--red {
  stroke: var(--color-primary);
}

.page-solutions .sol-chart__line--gold {
  stroke: var(--color-accent);
}

.page-solutions .sol-chart__dot--red {
  fill: var(--color-primary);
}

.page-solutions .sol-chart__dot--gold {
  fill: var(--color-accent);
}

.page-solutions .sol-chart__axis {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--color-ink-muted);
  letter-spacing: 0.08em;
}

.page-solutions .sol-chart__axis--unit {
  font-size: 10px;
  fill: var(--color-ink-soft);
  letter-spacing: 0.04em;
}

.page-solutions .sol-chart__caption {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-line);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-solutions .sol-chart__key {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
}

.page-solutions .sol-chart__key--red {
  color: var(--color-primary);
}

.page-solutions .sol-chart__key--gold {
  color: var(--color-accent);
}

/* ============ 起点岔路 ============ */
.page-solutions .sol-fork-section {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  border-top: 3px double var(--color-line);
  background: var(--color-surface-alt);
}

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

.page-solutions .sol-fork__branch {
  position: relative;
  padding: var(--space-4);
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-solutions .sol-fork__mark {
  margin: 0;
  display: inline-block;
  align-self: flex-start;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: 3px var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
}

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

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

.page-solutions .sol-fork__branch .btn {
  align-self: flex-start;
  margin-top: auto;
}

.page-solutions .sol-exit {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  align-items: center;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

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

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

.page-solutions .sol-exit .btn {
  justify-self: start;
}

.page-solutions a:focus-visible,
.page-solutions summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ============ 断点 ============ */
@media (min-width: 720px) {
  .page-solutions .sol-hero__figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-solutions .sol-exit {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-solutions .sol-exit .btn {
    justify-self: end;
  }
}

@media (min-width: 960px) {
  .page-solutions .sol-hero__stage {
    grid-template-columns: minmax(0, 1fr) 232px;
    align-items: stretch;
    gap: var(--space-4);
  }

  .page-solutions .sol-hero__figures {
    grid-template-columns: minmax(0, 1fr);
    grid-auto-rows: 1fr;
  }

  .page-solutions .sol-strip__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-solutions .sol-strip--b .sol-strip__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    margin-left: 8.333%;
  }

  .page-solutions .sol-strip--c .sol-strip__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-solutions .sol-strip--d .sol-strip__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    margin-right: 8.333%;
  }

  .page-solutions .sol-strip--e .sol-strip__inner {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-solutions * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-solutions .reveal {
    transform: none !important;
    opacity: 1 !important;
  }
}
<<<END>>>