.page-solutions-industry {
  --pi-index-w: 216px;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

/* ---------- 标题层级 ---------- */
.page-solutions-industry h1,
.page-solutions-industry h2,
.page-solutions-industry h3 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: inherit;
}

.page-solutions-industry h1 {
  margin: 0 0 var(--space-3);
  font-size: clamp(var(--text-2xl), 6vw, var(--text-3xl));
}

.page-solutions-industry h2 {
  margin: 0 0 var(--space-3);
  font-size: clamp(var(--text-xl), 4.2vw, var(--text-2xl));
}

.page-solutions-industry h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: 700;
}

/* ---------- 首屏 ---------- */
.page-solutions-industry .pi-hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-4) var(--space-8);
  background: var(--color-surface);
  border-bottom: var(--border-thick) solid var(--color-ink);
}

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

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

.page-solutions-industry .pi-lead {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  font-size: var(--text-lg);
  line-height: 1.7;
}

.page-solutions-industry .pi-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.04);
}

/* ---------- 首屏数字条 ---------- */
.page-solutions-industry .pi-stats {
  display: grid;
  gap: 1px;
  margin: var(--space-6) 0 0;
  padding: 0;
  background: var(--color-line);
  border-top: var(--border-thick) solid var(--color-ink);
}

.page-solutions-industry .pi-stats > div {
  padding: var(--space-3) var(--space-2) var(--space-4);
  background: var(--color-surface);
}

.page-solutions-industry .pi-stats dt {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: -0.03em;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.page-solutions-industry .pi-stats dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

/* ---------- 主布局 ---------- */
.page-solutions-industry .pi-layout {
  display: grid;
  row-gap: 0;
}

/* ---------- 左侧小节索引 ---------- */
.page-solutions-industry .pi-index {
  display: none;
}

.page-solutions-industry .pi-index__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-solutions-industry .pi-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thick) solid var(--color-ink);
}

.page-solutions-industry .side-link {
  display: block;
  padding: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background-color 180ms ease, color 180ms ease;
}

.page-solutions-industry .side-link:hover,
.page-solutions-industry .side-link:focus-visible {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

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

.page-solutions-industry:has(#pain:target) .side-link[href="#pain"],
.page-solutions-industry:has(#fit:target) .side-link[href="#fit"],
.page-solutions-industry:has(#relay:target) .side-link[href="#relay"],
.page-solutions-industry:has(#diff:target) .side-link[href="#diff"],
.page-solutions-industry:has(#next:target) .side-link[href="#next"] {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

/* ---------- 正文章节 ---------- */
.page-solutions-industry .pi-section {
  position: relative;
  padding-block: var(--section-y);
}

.page-solutions-industry .pi-body > .pi-section + .pi-section {
  border-top: var(--border-thick) solid var(--color-ink);
}

.page-solutions-industry .pi-prose p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
}

.page-solutions-industry .pi-prose p:last-child {
  margin-bottom: 0;
}

.page-solutions-industry .pi-invert .pi-prose p {
  color: var(--color-contrast-ink);
}

/* ---------- 深底反转章节 ---------- */
.page-solutions-industry .pi-invert {
  padding-block: var(--section-y-lg);
  padding-inline: var(--space-4);
  color: var(--color-contrast-ink);
  border-top: none;
}

.page-solutions-industry .pi-invert::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(-1 * var(--gutter));
  right: calc(-1 * var(--gutter));
  background: var(--color-contrast-surface);
  z-index: -1;
}

.page-solutions-industry .pi-invert h2,
.page-solutions-industry .pi-invert h3 {
  color: var(--color-contrast-ink);
}

.page-solutions-industry .pi-invert .section-signature {
  color: var(--color-contrast-accent);
}

/* ---------- 列表 ---------- */
.page-solutions-industry .pi-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-solutions-industry .pi-list li {
  position: relative;
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  border-bottom: var(--border-thin) solid color-mix(in srgb, currentColor 20%, transparent);
  font-size: var(--text-base);
  line-height: 1.65;
}

.page-solutions-industry .pi-list li:last-child {
  border-bottom: none;
}

.page-solutions-industry .pi-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(var(--space-2) + 10px);
  width: var(--space-1);
  height: var(--space-1);
  background: var(--color-accent);
}

.page-solutions-industry .pi-list--no li::before {
  background: color-mix(in srgb, currentColor 55%, transparent);
}

.page-solutions-industry .pi-list strong {
  font-weight: 700;
}

/* ---------- 适配对象 / 不适配 ---------- */
.page-solutions-industry .pi-fit {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.page-solutions-industry .pi-fit__col--no h3 {
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

/* ---------- 步骤条 ---------- */
.page-solutions-industry .pi-stepbar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: var(--space-4);
  background: var(--color-line);
  border-top: var(--border-thick) solid var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-ink);
}

.page-solutions-industry .pi-stepbar a {
  display: block;
  padding: var(--space-3) var(--space-2);
  background: var(--color-surface-alt);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: background-color 180ms ease, color 180ms ease;
}

.page-solutions-industry .pi-stepbar a:hover,
.page-solutions-industry .pi-stepbar a:focus-visible {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-solutions-industry .pi-stepbar a:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: -4px;
}

.page-solutions-industry .pi-stepbar__no {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-lg);
  color: var(--color-accent);
}

.page-solutions-industry .pi-stepbar a:hover .pi-stepbar__no,
.page-solutions-industry .pi-stepbar a:focus-visible .pi-stepbar__no {
  color: inherit;
}

/* ---------- 步骤详情 ---------- */
.page-solutions-industry .pi-steps {
  list-style: none;
  display: grid;
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
  padding: 0;
}

.page-solutions-industry .pi-step {
  padding: var(--space-2) var(--space-2) var(--space-3);
  border-top: var(--border-thick) solid var(--color-ink);
  transition: background-color 180ms ease;
}

.page-solutions-industry .pi-step:target {
  background: var(--color-primary-soft);
}

.page-solutions-industry .pi-step__no {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
}

.page-solutions-industry .pi-step p {
  margin: 0 0 var(--space-2);
  max-width: var(--measure);
}

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

.page-solutions-industry .pi-copy {
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

/* ---------- 图片 ---------- */
.page-solutions-industry .pi-figure {
  margin: var(--space-6) 0 0;
}

.page-solutions-industry .pi-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.04);
}

.page-solutions-industry .pi-figure--wide img {
  aspect-ratio: 3 / 2;
}

.page-solutions-industry .pi-figure .media-caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 材料清单 ---------- */
.page-solutions-industry .pi-materials {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-surface-deep);
}

.page-solutions-industry .pi-materials h3 {
  margin-bottom: var(--space-3);
}

/* ---------- 方案对照 ---------- */
.page-solutions-industry .pi-compare {
  display: grid;
  gap: 1px;
  margin-top: var(--space-4);
  background: var(--color-line);
}

.page-solutions-industry .pi-compare__col {
  padding: var(--space-4);
  transition: background-color 180ms ease, color 180ms ease;
}

.page-solutions-industry .pi-compare__col h3 {
  margin-top: var(--space-2);
}

.page-solutions-industry .pi-compare__col--general {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-solutions-industry .pi-compare__col--custom {
  background: var(--color-surface-deep);
  color: var(--color-ink);
}

.page-solutions-industry .pi-compare:hover .pi-compare__col--general,
.page-solutions-industry .pi-compare:focus-within .pi-compare__col--general {
  background: var(--color-surface-deep);
  color: var(--color-ink);
}

.page-solutions-industry .pi-compare:hover .pi-compare__col--custom,
.page-solutions-industry .pi-compare:focus-within .pi-compare__col--custom {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-solutions-industry .pi-compare__tag {
  display: inline-block;
  margin: 0;
  padding: var(--space-1) var(--space-2);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
}

/* ---------- 结尾行动区 ---------- */
.page-solutions-industry .pi-cta {
  padding: var(--space-6) var(--space-4);
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-solutions-industry .pi-cta__sig {
  color: var(--color-primary-ink);
}

.page-solutions-industry .pi-cta h2 {
  color: var(--color-primary-ink);
}

.page-solutions-industry .pi-cta__grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.page-solutions-industry .pi-cta__cell h3 {
  color: var(--color-primary-ink);
  font-size: var(--text-lg);
}

.page-solutions-industry .pi-cta__cell p {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: 1.7;
}

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

.page-solutions-industry .pi-cta a:hover,
.page-solutions-industry .pi-cta a:focus-visible {
  background: var(--color-primary-ink);
  color: var(--color-primary);
  text-decoration: none;
  outline: none;
}

.page-solutions-industry .pi-cta a:focus-visible {
  outline: var(--border-thick) solid var(--color-contrast-surface);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-solutions-industry .pi-stepbar {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-solutions-industry .pi-stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 860px) {
  .page-solutions-industry .pi-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }

  .page-solutions-industry .pi-fit {
    grid-template-columns: 8fr 4fr;
    gap: var(--space-8);
  }

  .page-solutions-industry .pi-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .page-solutions-industry .pi-compare {
    grid-template-columns: 1fr 1fr;
  }

  .page-solutions-industry .pi-cta__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-solutions-industry .pi-layout {
    grid-template-columns: var(--pi-index-w) 1fr;
    column-gap: var(--space-8);
  }

  .page-solutions-industry .pi-index {
    display: block;
    position: sticky;
    top: var(--space-6);
    align-self: start;
    padding-block: var(--section-y);
  }
}

@media (min-width: 1220px) {
  .page-solutions-industry .pi-invert::before {
    left: calc(-1 * var(--space-6));
    right: calc(-1 * var(--space-6));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-solutions-industry .side-link,
  .page-solutions-industry .pi-stepbar a,
  .page-solutions-industry .pi-step,
  .page-solutions-industry .pi-compare__col {
    transition: none;
  }
}