.page-solutions {
  --ps-glass-edge: color-mix(in srgb, var(--color-surface) 42%, transparent);
  --ps-panel-solid: var(--color-surface);
  --ps-panel-glass: color-mix(in srgb, var(--color-surface) 95%, transparent);
  --ps-band-veil: linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-primary) 26%, transparent) 0%,
    transparent 55%
  );
  --ps-ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ---------- 首屏 ---------- */

.page-solutions .hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-8) 0 var(--space-6);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.page-solutions .hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.page-solutions .hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      200deg,
      color-mix(in srgb, var(--color-primary) 62%, transparent) 0%,
      color-mix(in srgb, var(--color-contrast-surface) 88%, transparent) 72%
    ),
    var(--overlay-scrim);
}

.page-solutions .hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-4);
}

.page-solutions .hero__glass {
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--ps-glass-edge);
  background: color-mix(in srgb, var(--color-surface) 13%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(1.08);
  backdrop-filter: blur(16px) saturate(1.08);
  box-shadow: var(--shadow-2);
  color: var(--color-contrast-ink);
}

.page-solutions .hero__crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

.page-solutions .hero__crumbs a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-contrast-ink) 48%, transparent);
  transition: color 200ms var(--ps-ease), border-color 200ms var(--ps-ease);
}

.page-solutions .hero__crumbs a:hover,
.page-solutions .hero__crumbs a:focus-visible {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.page-solutions .hero__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: var(--leading-heading);
  letter-spacing: -0.02em;
  color: var(--color-contrast-ink);
}

.page-solutions .hero__lead {
  margin: var(--space-3) 0 0;
  max-width: 46ch;
  font-size: var(--text-lg);
  line-height: 1.72;
  color: color-mix(in srgb, var(--color-contrast-ink) 88%, transparent);
}

.page-solutions .hero__track {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-1);
}

.page-solutions .hero__track li {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) 0;
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid var(--ps-glass-edge);
  background: color-mix(in srgb, var(--color-surface) 11%, transparent);
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
  transition: background 240ms var(--ps-ease), border-color 240ms var(--ps-ease);
}

.page-solutions .hero__track li:nth-child(4n + 1) {
  border-color: color-mix(in srgb, var(--color-contrast-accent) 58%, transparent);
}

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

.page-solutions .figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--ps-glass-edge);
  background: color-mix(in srgb, var(--color-surface) 10%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.page-solutions .figure__num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-ink);
}

.page-solutions .figure__unit {
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

.page-solutions .figure__note {
  font-size: var(--text-xs);
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

/* ---------- 区块标题 ---------- */

.page-solutions .head,
.page-solutions .band__head {
  display: grid;
  gap: var(--space-2);
  max-width: 62ch;
  margin-bottom: var(--space-6);
}

.page-solutions .head__index,
.page-solutions .band__tick {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-accent);
}

.page-solutions .head h2,
.page-solutions .band__head h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

.page-solutions .band__head--invert h2 {
  color: var(--color-contrast-ink);
}

.page-solutions .band__head--invert p {
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

.page-solutions .band__head--invert .band__tick {
  color: var(--color-contrast-accent);
}

/* ---------- 步骤总览 ---------- */

.page-solutions .map__layout {
  align-items: start;
}

.page-solutions .map__groups {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-solutions .map__group {
  position: relative;
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
}

.page-solutions .map__tick {
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.page-solutions .map__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-solutions .map__desc {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

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

.page-solutions .map__steps li {
  display: flex;
  gap: var(--space-2);
  align-items: baseline;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink);
}

.page-solutions .map__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  background: var(--color-surface-deep);
  border-radius: calc(var(--radius-sm) / 3.5);
  padding: 2px var(--space-1);
}

.page-solutions .map__media {
  margin: var(--space-3) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  box-shadow: var(--shadow-1);
}

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

/* ---------- 步骤分区 ---------- */

.page-solutions .band {
  position: relative;
  isolation: isolate;
}

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

.page-solutions .band__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

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

.page-solutions .band__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ps-band-veil), var(--overlay-scrim);
}

.page-solutions .band__body {
  display: grid;
  gap: var(--space-4);
}

.page-solutions .band__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  box-shadow: var(--shadow-1);
}

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

/* ---------- 步骤抽屉 ---------- */

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

.page-solutions .step {
  position: relative;
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--color-line);
  background: var(--ps-panel-solid);
  background: var(--ps-panel-glass);
  -webkit-backdrop-filter: blur(14px) saturate(1.05);
  backdrop-filter: blur(14px) saturate(1.05);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: transform 240ms var(--ps-ease), border-color 240ms var(--ps-ease), box-shadow 240ms var(--ps-ease);
}

.page-solutions .step:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-line));
  box-shadow: var(--shadow-2);
}

.page-solutions .step[open] {
  border-color: color-mix(in srgb, var(--color-primary) 54%, var(--color-line));
}

.page-solutions .step__summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  padding: var(--space-3) var(--space-6) var(--space-3) var(--space-3);
  cursor: pointer;
  list-style: none;
}

.page-solutions .step__summary::-webkit-details-marker {
  display: none;
}

.page-solutions .step__summary::marker {
  content: "";
}

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

.page-solutions .step__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

.page-solutions .step[open] .step__num {
  color: var(--color-accent);
}

.page-solutions .step__title {
  flex: 1 1 16ch;
  min-width: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.45;
  color: var(--color-ink);
}

.page-solutions .step__group {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  background: var(--color-surface-deep);
  border-radius: calc(var(--radius-sm) / 3.5);
  padding: 2px var(--space-1);
}

.page-solutions .step__caret {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--color-ink-muted);
  border-bottom: 2px solid var(--color-ink-muted);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 240ms var(--ps-ease), border-color 240ms var(--ps-ease);
  pointer-events: none;
}

.page-solutions .step[open] .step__caret {
  transform: translateY(-30%) rotate(225deg);
  border-color: var(--color-accent);
}

.page-solutions .step__panel {
  display: grid;
  gap: var(--space-3);
  padding: 0 var(--space-3) var(--space-4);
}

.page-solutions .step[open] .step__panel {
  animation: ps-step-open 240ms var(--ps-ease) both;
}

@keyframes ps-step-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-solutions .step__block {
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-line);
}

.page-solutions .step__block--confirm {
  border-left-color: var(--color-accent);
}

.page-solutions .step__block-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-solutions .step__block--confirm .step__block-title {
  color: var(--color-accent);
}

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

/* ---------- 卡点 ---------- */

.page-solutions .trouble__list {
  counter-reset: ps-trouble;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-solutions .trouble__item {
  position: relative;
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
  transition: border-color 240ms var(--ps-ease), box-shadow 240ms var(--ps-ease);
}

.page-solutions .trouble__item:hover {
  border-color: color-mix(in srgb, var(--color-primary) 42%, var(--color-line));
  box-shadow: var(--shadow-1);
}

.page-solutions .trouble__item::before {
  counter-increment: ps-trouble;
  content: counter(ps-trouble, decimal-leading-zero);
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-solutions .trouble__sym {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.45;
  color: var(--color-ink);
}

.page-solutions .trouble__fix {
  margin: var(--space-1) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 相关入口 ---------- */

.page-solutions .next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-solutions .next__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
  text-decoration: none;
  transition: transform 240ms var(--ps-ease), border-color 240ms var(--ps-ease), box-shadow 240ms var(--ps-ease);
}

.page-solutions .next__link:hover,
.page-solutions .next__link:focus-visible {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--color-primary) 48%, var(--color-line));
  box-shadow: var(--shadow-1);
}

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

.page-solutions .next__kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.page-solutions .next__text {
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-solutions .hero {
    padding: var(--space-8) 0 var(--space-8);
  }

  .page-solutions .hero__glass {
    padding: var(--space-6) var(--space-4);
  }

  .page-solutions .hero__track {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .page-solutions .trouble__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }

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

  .page-solutions .step__panel {
    padding: 0 var(--space-6) var(--space-6) var(--space-3);
  }
}

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

  .page-solutions .hero__track li {
    font-size: var(--text-4xl);
    padding: var(--space-3) 0;
  }

  .page-solutions .head h2,
  .page-solutions .band__head h2 {
    font-size: var(--text-4xl);
  }

  .page-solutions .band__head {
    margin-bottom: var(--space-8);
  }

  .page-solutions .map__media {
    margin-top: 0;
  }

  .page-solutions .band__body--split {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-solutions .step__panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3) var(--space-4);
    padding: 0 var(--space-6) var(--space-6) var(--space-3);
  }

  .page-solutions .step__block--confirm {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1080px) {
  .page-solutions .next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-solutions .step,
  .page-solutions .step__caret,
  .page-solutions .next__link,
  .page-solutions .trouble__item {
    transition: none;
  }

  .page-solutions .step[open] .step__panel {
    animation: none;
  }

  .page-solutions .step:hover,
  .page-solutions .next__link:hover {
    transform: none;
  }
}
<<<END>>>