/* ============ 使用方案 /solutions/ ============ */
.page-solutions {
  --sol-node: 2.25rem;
}

/* ---------- 首屏 ---------- */
.page-solutions .sol-hero {
  padding: var(--space-6) 0 var(--section-y);
}

.page-solutions .sol-kicker {
  margin: var(--space-8) 0 0;
  color: var(--color-ink-muted);
}

.page-solutions .sol-title {
  margin: var(--space-3) 0 0;
  max-width: 13ch;
  letter-spacing: var(--tracking-heading);
}

.page-solutions .sol-lede {
  margin: var(--space-4) 0 0;
  max-width: 46ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-solutions .sol-figures {
  list-style: none;
  margin: var(--space-8) 0 0;
  padding: var(--space-3) 0 0;
  border-top: var(--border-thick) solid var(--color-ink);
  display: grid;
  gap: var(--space-4);
}

.page-solutions .sol-figures li {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-solutions .sol-figures .label {
  color: var(--color-ink-muted);
}

/* ---------- 步骤轨道 ---------- */
.page-solutions .sol-tracks {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.page-solutions .sol-track {
  display: grid;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-track[data-active] {
  border-top-color: var(--color-primary);
}

.page-solutions .sol-track-name {
  margin: 0;
  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);
}

.page-solutions .sol-track-rail {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-solutions .sol-track-rail::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: var(--border-thin);
  background: var(--color-line);
}

.page-solutions .sol-node {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--sol-node);
  height: var(--sol-node);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1;
  text-decoration: none;
  color: var(--color-ink);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-node--hot {
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.page-solutions .sol-node:hover,
.page-solutions .sol-node:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-solutions .sol-node--hot:hover,
.page-solutions .sol-node--hot:focus-visible {
  color: var(--color-primary-ink);
}

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

.page-solutions .sol-track-meta {
  margin: 0;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* ---------- 路径区块 ---------- */
.page-solutions .sol-path {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-path-head {
  display: grid;
  gap: var(--space-2);
}

.page-solutions .sol-path-head .label {
  color: var(--color-primary);
}

.page-solutions .sol-path-title {
  margin: 0;
  max-width: 15em;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-solutions .sol-path-head--narrow .sol-path-title {
  max-width: 13em;
}

.page-solutions .sol-path-head--narrower .sol-path-title {
  max-width: 11em;
}

.page-solutions .sol-path-lead {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

/* ---------- 步骤列表 ---------- */
.page-solutions .sol-steps {
  list-style: none;
  margin: var(--space-8) 0 0;
  padding: 0;
}

.page-solutions .sol-step {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-6) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-solutions .sol-step-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.page-solutions .sol-step-body {
  display: grid;
  gap: var(--space-2);
  max-width: var(--measure);
}

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

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

.page-solutions .sol-step-check {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary);
  background: var(--color-surface-alt);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-solutions .sol-step-check .label {
  display: inline;
  margin-right: var(--space-1);
  color: var(--color-ink-muted);
}

.page-solutions .sol-step-text a,
.page-solutions .sol-step-check a,
.page-solutions .sol-path-lead a,
.page-solutions .sol-dev-text a,
.page-solutions .sol-dev-fix a,
.page-solutions .sol-check-lead a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: var(--border-thin);
  text-underline-offset: 0.18em;
}

.page-solutions .sol-step-text a:hover,
.page-solutions .sol-dev-fix a:hover {
  color: var(--color-primary);
}

/* ---------- 图片 ---------- */
.page-solutions .media-frame {
  margin: 0;
  overflow: hidden;
}

.page-solutions .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-solutions .media-caption {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-solutions .sol-wide-figure {
  margin-top: var(--space-8);
}

/* ---------- 错位分栏 ---------- */
.page-solutions .sol-split {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.page-solutions .sol-split .sol-steps {
  margin-top: 0;
}

/* ---------- 偏差 ---------- */
.page-solutions .sol-dev-list {
  list-style: none;
  margin: var(--space-8) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-8);
}

.page-solutions .sol-dev {
  display: grid;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: var(--border-thick) solid var(--color-ink);
}

.page-solutions .sol-dev-index {
  color: var(--color-ink-muted);
}

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

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

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

.page-solutions .sol-dev-fix .label {
  display: inline;
  margin-right: var(--space-1);
  color: var(--color-primary);
}

/* ---------- 结果确认清单 ---------- */
.page-solutions .sol-check-panel {
  padding: var(--space-6) var(--space-3);
}

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

.page-solutions .sol-check-head {
  display: grid;
  gap: var(--space-2);
  align-content: start;
}

.page-solutions .sol-check-panel .label {
  color: var(--color-contrast-accent);
}

.page-solutions .sol-check-title {
  margin: 0;
  max-width: 18em;
  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-contrast-ink);
}

.page-solutions .sol-check-lead {
  margin: 0;
  max-width: 40ch;
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.page-solutions .sol-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
  align-content: start;
}

.page-solutions .sol-check-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  align-items: start;
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-solutions .sol-check-box {
  width: 0.85em;
  height: 0.85em;
  margin-top: 0.45em;
  border: var(--border-thin) solid var(--color-contrast-accent);
}

.page-solutions .sol-check-figure {
  margin: var(--space-8) 0 0;
  max-width: 34rem;
}

.page-solutions .sol-check-panel .media-frame {
  margin: 0;
}

.page-solutions .sol-check-panel .media-caption {
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-solutions .sol-step {
    grid-template-columns: auto 1fr;
    gap: var(--space-3);
  }
}

@media (min-width: 720px) {
  .page-solutions .sol-figures {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gutter);
  }
}

@media (min-width: 900px) {
  .page-solutions .sol-tracks {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gutter);
    align-items: start;
  }

  .page-solutions .sol-track:nth-child(2) {
    margin-top: var(--space-6);
  }

  .page-solutions .sol-track:nth-child(3) {
    margin-top: var(--space-8);
  }

  .page-solutions .sol-split {
    grid-template-columns: repeat(12, 1fr);
    gap: var(--gutter);
    align-items: start;
  }

  .page-solutions .sol-split--a .sol-split-steps {
    grid-row: 1;
    grid-column: 1 / span 8;
  }

  .page-solutions .sol-split--a .sol-split-fig {
    grid-row: 1;
    grid-column: 9 / span 4;
    margin-top: var(--space-8);
  }

  .page-solutions .sol-split--b .sol-split-steps {
    grid-row: 1;
    grid-column: 1 / span 7;
  }

  .page-solutions .sol-split--b .sol-split-fig {
    grid-row: 1;
    grid-column: 9 / span 4;
    margin-top: var(--space-6);
  }

  .page-solutions .sol-split--c .sol-split-steps {
    grid-row: 1;
    grid-column: 6 / span 7;
  }

  .page-solutions .sol-split--c .sol-split-fig {
    grid-row: 1;
    grid-column: 1 / span 4;
    margin-top: var(--space-6);
  }

  .page-solutions .sol-dev-list {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gutter);
  }

  .page-solutions .sol-check-panel {
    padding: var(--space-8);
  }

  .page-solutions .sol-check-cols {
    grid-template-columns: 4fr 7fr;
    gap: var(--space-8);
  }
}