.page-solutions {
  --sol-rail-w: 188px;
  --sol-spec-key: 72px;
}

/* ============ 首屏 ============ */

.page-solutions .sol-hero {
  padding-top: var(--space-4);
  padding-bottom: var(--section-y);
}

.page-solutions .sol-hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: end;
}

@media (min-width: 900px) {
  .page-solutions .sol-hero-inner {
    grid-template-columns: 1.1fr 1fr;
    gap: var(--space-8);
  }
}

.page-solutions .sol-hero-copy .kicker {
  color: var(--color-ink-soft);
  margin-bottom: var(--space-2);
}

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

.page-solutions .sol-hero-lede {
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-solutions .sol-hero-nums {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

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

.page-solutions .sol-num-value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.page-solutions .sol-num-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-solutions .sol-hero-visual {
  position: relative;
  min-width: 0;
}

.page-solutions .sol-chapter {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.86;
  letter-spacing: -0.02em;
  color: color-mix(in srgb, var(--color-accent) 58%, transparent);
  margin-bottom: calc(var(--space-3) * -1);
  position: relative;
  z-index: 2;
  padding-left: var(--space-1);
}

.page-solutions .sol-hero-imgwrap {
  position: relative;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 36%, transparent);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-2);
}

.page-solutions .sol-hero-imgwrap img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.62) contrast(1.04);
}

.page-solutions .sol-hero-imgwrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.page-solutions .sol-matrix {
  position: absolute;
  inset: auto var(--space-3) var(--space-3) var(--space-3);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: var(--space-2);
  grid-auto-flow: dense;
  gap: var(--space-1);
  z-index: 2;
}

.page-solutions .sol-m-cell {
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-line) 92%, transparent);
  background: color-mix(in srgb, var(--color-surface-alt) 88%, transparent);
}

.page-solutions .sol-m-cell:nth-child(1),
.page-solutions .sol-m-cell:nth-child(6),
.page-solutions .sol-m-cell:nth-child(8) {
  grid-row: span 3;
}

.page-solutions .sol-m-cell:nth-child(2),
.page-solutions .sol-m-cell:nth-child(5),
.page-solutions .sol-m-cell:nth-child(9) {
  grid-row: span 2;
}

.page-solutions .sol-m-cell:nth-child(3),
.page-solutions .sol-m-cell:nth-child(4),
.page-solutions .sol-m-cell:nth-child(7) {
  grid-row: span 4;
}

.page-solutions .sol-m-cell:nth-child(-n+3) {
  background: color-mix(in srgb, var(--color-primary-soft) 84%, transparent);
  border-color: color-mix(in srgb, var(--color-primary) 44%, transparent);
}

.page-solutions .sol-m-cell:nth-child(n+7) {
  border-color: color-mix(in srgb, var(--color-accent) 46%, transparent);
}

.page-solutions .sol-hero-cap {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* ============ 主体：轨道 + 内容流 ============ */

.page-solutions .sol-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-bottom: var(--section-y);
}

@media (min-width: 900px) {
  .page-solutions .sol-body {
    grid-template-columns: var(--sol-rail-w) minmax(0, 1fr);
    gap: var(--space-8);
  }
}

.page-solutions .sol-rail {
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  -webkit-overflow-scrolling: touch;
}

.page-solutions .sol-rail-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  flex: 0 0 auto;
  white-space: nowrap;
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-solutions .sol-rail-link:hover {
  color: var(--color-accent);
  border-color: color-mix(in srgb, var(--color-accent) 52%, transparent);
}

.page-solutions .sol-rail-link[aria-current="true"] {
  color: var(--color-accent);
  border-color: color-mix(in srgb, var(--color-accent) 60%, transparent);
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
}

.page-solutions .sol-rail-no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-solutions .sol-rail-link[aria-current="true"] .sol-rail-no {
  color: var(--color-accent);
}

@media (min-width: 900px) {
  .page-solutions .sol-rail {
    display: block;
    position: sticky;
    top: var(--space-6);
    align-self: start;
    overflow: visible;
    padding: 0 0 0 var(--space-2);
    border-bottom: 0;
    border-left: var(--border-thin) solid var(--color-line);
  }

  .page-solutions .sol-rail-link {
    display: block;
    white-space: normal;
    border: 0;
    border-radius: 0;
    padding: var(--space-2) 0;
    background: none;
    position: relative;
    line-height: 1.5;
  }

  .page-solutions .sol-rail-link + .sol-rail-link {
    border-top: var(--border-thin) solid color-mix(in srgb, var(--color-line) 70%, transparent);
  }

  .page-solutions .sol-rail-no {
    display: block;
    margin-bottom: var(--space-1);
  }

  .page-solutions .sol-rail-link[aria-current="true"] {
    background: none;
  }

  .page-solutions .sol-rail-link[aria-current="true"]::before {
    content: "";
    position: absolute;
    left: calc(var(--space-2) * -1);
    top: var(--space-2);
    width: var(--border-thick);
    height: var(--space-4);
    background: var(--color-accent);
  }
}

.page-solutions .sol-stream {
  display: flex;
  flex-direction: column;
  gap: var(--section-y);
  min-width: 0;
}

/* ============ 分组 ============ */

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

.page-solutions .sol-group-head .kicker {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-accent);
}

.page-solutions .sol-group-head .kicker::before {
  content: "";
  flex: 0 0 auto;
  width: var(--space-6);
  height: var(--border-thin);
  background: var(--color-accent);
}

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

@media (min-width: 700px) {
  .page-solutions .sol-group-h {
    font-size: var(--text-3xl);
  }
}

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

/* ============ 方案条目 ============ */

.page-solutions .sol-plans {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-solutions .sol-plan {
  position: relative;
  width: 100%;
  min-width: 0;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-solutions .sol-plan:hover,
.page-solutions .sol-plan:focus-within {
  border-color: color-mix(in srgb, var(--color-accent) 58%, transparent);
}

.page-solutions .sol-plan--lead {
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-accent) 46%, transparent);
  padding: var(--space-4) var(--space-3);
}

@media (min-width: 820px) {
  .page-solutions .sol-plan--wide {
    width: 88%;
  }

  .page-solutions .sol-plan--narrow {
    width: 74%;
    margin-left: auto;
  }
}

.page-solutions .sol-plan-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
}

.page-solutions .sol-plan-no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.8;
  color: var(--color-accent);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 44%, transparent);
  border-radius: var(--radius-sm);
  padding: 0 var(--space-1);
}

.page-solutions .sol-plan-h {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
}

@media (min-width: 820px) {
  .page-solutions .sol-plan--lead .sol-plan-h {
    font-size: var(--text-xl);
  }
}

.page-solutions .sol-plan-lede {
  margin-top: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-solutions .sol-plan-spec {
  margin: var(--space-3) 0 0;
  padding: var(--space-3) 0 0;
  border-top: var(--border-thin) solid var(--color-line);
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.page-solutions .sol-plan-spec li {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
}

@media (min-width: 620px) {
  .page-solutions .sol-plan-spec li {
    grid-template-columns: var(--sol-spec-key) minmax(0, 1fr);
    gap: var(--space-2);
    align-items: baseline;
  }
}

.page-solutions .sol-plan-k {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.page-solutions .sol-plan-v {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-solutions .sol-plan-fields {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease;
}

.page-solutions .sol-plan:hover .sol-plan-fields,
.page-solutions .sol-plan:focus-within .sol-plan-fields {
  max-height: 8em;
  opacity: 1;
}

@media (max-width: 819px) {
  .page-solutions .sol-plan-fields {
    max-height: none;
    opacity: 1;
  }
}

.page-solutions .sol-plan-next {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
}

/* ============ 图片区 ============ */

.page-solutions .sol-shot {
  position: relative;
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-alt);
}

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

.page-solutions .sol-shot--wide img {
  aspect-ratio: 7 / 4;
}

.page-solutions .sol-shot--small img {
  aspect-ratio: 9 / 7;
}

.page-solutions .sol-shot--square img {
  aspect-ratio: 1 / 1;
}

.page-solutions .sol-shot-scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  display: flex;
  align-items: flex-end;
  padding: var(--space-3);
  margin: 0;
}

.page-solutions .sol-shot-body {
  display: block;
  max-width: 48ch;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-contrast-ink);
}

.page-solutions .sol-shot-cap {
  padding: var(--space-2);
  margin: 0;
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
  border-top: var(--border-thin) solid var(--color-line);
}

@media (min-width: 820px) {
  .page-solutions .sol-shot--small {
    width: 64%;
    margin-left: auto;
  }

  .page-solutions .sol-shot--square {
    width: 58%;
  }
}

/* ============ 结论条与取舍 ============ */

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

.page-solutions .sol-mistakes {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-mistakes li {
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  display: grid;
  gap: var(--space-2);
}

@media (min-width: 820px) {
  .page-solutions .sol-mistakes li {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }
}

.page-solutions .sol-mistake-h {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-accent);
  margin: 0;
}

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

.page-solutions .sol-choose {
  margin-top: var(--space-6);
  padding: var(--space-4);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 38%, transparent);
  border-left: var(--border-thick) solid var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-1);
}

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

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

.page-solutions .sol-tie {
  margin-top: var(--space-6);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ============ 行动出口 ============ */

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

.page-solutions .sol-exit-frame {
  padding: var(--space-6) var(--space-4);
}

@media (min-width: 820px) {
  .page-solutions .sol-exit-frame {
    padding: var(--space-8) var(--space-6);
  }
}

.page-solutions .sol-exit-h {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-3) 0 var(--space-3);
  max-width: 24ch;
}

@media (min-width: 820px) {
  .page-solutions .sol-exit-h {
    font-size: var(--text-3xl);
  }
}

.page-solutions .sol-exit-b {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-2);
}

.page-solutions .sol-exit-b strong {
  color: var(--color-accent);
  font-weight: var(--weight-heading);
  font-family: var(--font-mono);
}

.page-solutions .sol-exit-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-solutions .sol-copy-status {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ============ 动效偏好 ============ */

@media (prefers-reduced-motion: reduce) {
  .page-solutions .sol-plan,
  .page-solutions .sol-rail-link,
  .page-solutions .sol-plan-fields {
    transition: none;
  }
}