.page-solutions {
  --ps-hero-pad: clamp(21px, 3.4vw, 49px);
  --ps-visual-ratio: 10 / 7;
  display: block;
}

.page-solutions .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 首屏框景 ---------- */

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

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

.page-solutions .hero-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}

.page-solutions .hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

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

.page-solutions .hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-6);
  padding: var(--ps-hero-pad);
}

.page-solutions .hero-eyebrow {
  margin: 0 0 var(--space-3);
  color: var(--color-contrast-accent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.24em;
}

.page-solutions .hero-title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-solutions .hero-lead {
  max-width: 54ch;
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.66;
  color: var(--color-contrast-ink);
  opacity: 0.84;
}

.page-solutions .hero-figs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-solutions .hero-fig {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-contrast-line);
}

.page-solutions .fig-num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-ink);
}

.page-solutions .hero-fig--key .fig-num {
  color: var(--color-contrast-accent);
}

.page-solutions .fig-label {
  font-size: var(--text-xs);
  line-height: 1.45;
  color: var(--color-contrast-ink);
  opacity: 0.68;
}

.page-solutions .hero-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-contrast-line);
}

.page-solutions .hero-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: 7px 14px;
  border: 1px solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.page-solutions .hero-nav a:hover,
.page-solutions .hero-nav a:focus-visible {
  border-color: var(--color-contrast-ink);
  background-color: color-mix(in srgb, var(--color-contrast-ink) 12%, transparent);
  transform: translateY(-2px);
}

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

.page-solutions .nav-idx {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-contrast-accent);
}

/* ---------- 分组通用 ---------- */

.page-solutions .group {
  padding-top: var(--section-y-lg);
  scroll-margin-top: 110px;
}

.page-solutions .group-head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.page-solutions .group-num {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-primary);
}

.page-solutions .group-title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

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

.page-solutions .group-grid {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

/* ---------- 模块清单 ---------- */

.page-solutions .module-list {
  display: grid;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-solutions .module {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-1) 0 var(--space-1) var(--space-3);
  border-left: 2px solid var(--color-primary-soft);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-solutions .module:hover {
  border-left-color: var(--color-primary);
  transform: translateX(2px);
}

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

.page-solutions .module-id {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-solutions .module-name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-ink);
}

.page-solutions .module-desc {
  margin: 0;
  max-width: 58ch;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-solutions .field-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-solutions .field {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-deep);
}

.page-solutions .field-key {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-solutions .field-val {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-solutions .source-note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-xs);
  line-height: 1.5;
  color: var(--color-ink-muted);
  text-align: right;
}

/* ---------- 分组视觉 ---------- */

.page-solutions .group-visual {
  position: relative;
  overflow: hidden;
  margin: 0;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
  aspect-ratio: var(--ps-visual-ratio);
}

.page-solutions .group-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.page-solutions .visual-cap {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--space-3);
  background: var(--overlay-scrim);
  color: var(--color-primary-ink);
  font-size: var(--text-xs);
  line-height: 1.55;
}

.page-solutions .group-visual--schema {
  display: grid;
  align-content: center;
  gap: var(--space-3);
  padding: var(--space-4);
  aspect-ratio: auto;
  border: var(--border-thin) solid var(--color-contrast-line);
  background-color: var(--color-contrast-surface);
}

.page-solutions .schema {
  display: block;
  width: 100%;
  height: auto;
}

.page-solutions .schema-rail line {
  stroke: var(--color-contrast-line);
  stroke-width: 1.5;
}

.page-solutions .schema-node circle {
  fill: var(--color-contrast-surface);
  stroke: var(--color-primary);
  stroke-width: 1.5;
}

.page-solutions .schema-target rect {
  fill: none;
  stroke: var(--color-contrast-accent);
  stroke-width: 1.5;
}

.page-solutions .schema-target line {
  stroke: var(--color-contrast-accent);
  stroke-width: 1.5;
  opacity: 0.7;
}

.page-solutions .schema-cap {
  margin: 0;
  font-size: var(--text-xs);
  line-height: 1.5;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

/* ---------- 模块索引 ---------- */

.page-solutions .index-section {
  padding-block: var(--section-y-lg);
  scroll-margin-top: 110px;
}

.page-solutions .index-head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

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

.page-solutions .table-wrap {
  overflow-x: auto;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

.page-solutions .index-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: var(--text-sm);
  line-height: 1.42;
}

.page-solutions .index-table th {
  padding: 10px 14px;
  text-align: left;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  background-color: var(--color-surface-deep);
  white-space: nowrap;
}

.page-solutions .index-table td {
  padding: 9px 14px;
  color: var(--color-ink);
  vertical-align: top;
}

.page-solutions .index-table tbody tr:nth-child(even) {
  background-color: var(--color-surface-alt);
}

.page-solutions .index-table tbody tr:hover {
  background-color: var(--color-primary-soft);
}

.page-solutions .index-table .c-id {
  font-family: var(--font-mono);
  color: var(--color-accent);
  white-space: nowrap;
}

.page-solutions .index-table .c-name {
  font-weight: 700;
  white-space: nowrap;
}

.page-solutions .index-table .c-group {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-solutions .index-foot {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.page-solutions .index-foot .source-note {
  margin: 0;
  text-align: right;
}

.page-solutions .index-note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

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

/* ---------- 平板与桌面 ---------- */

@media (min-width: 680px) {
  .page-solutions .hero-figs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-solutions .hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: var(--space-8);
    row-gap: var(--space-6);
    align-items: end;
  }

  .page-solutions .hero-nav {
    grid-column: 1 / -1;
  }

  .page-solutions .group-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: var(--space-8);
  }

  .page-solutions .group--flip .group-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-solutions .group--flip .group-visual {
    grid-column: 1;
    grid-row: 1;
  }

  .page-solutions .group--flip .group-list {
    grid-column: 2;
    grid-row: 1;
  }

  .page-solutions .group-visual {
    aspect-ratio: auto;
    min-height: 340px;
  }
}

@media (min-width: 1180px) {
  .page-solutions .group-visual {
    min-height: 400px;
  }
}