/* ==========================================================
   page-scenarios · 使用场景
   移动端优先；桌面端进入 12 列非对称栅格
   ========================================================== */

.page-scenarios {
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
}

.page-scenarios .sc-breadcrumb {
  margin-bottom: var(--space-4);
}

/* ---------- 首屏 ---------- */

.page-scenarios .sc-hero__eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.page-scenarios .sc-hero__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 34ch;
}

.page-scenarios .sc-hero__lead {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-hero__stage {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-scenarios .sc-hero__figure {
  margin: 0;
  aspect-ratio: 15 / 10;
  border-radius: var(--radius-lg);
}

.page-scenarios .sc-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-scenarios .sc-hero__cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-scenarios .sc-hero__card {
  min-width: 0;
}

.page-scenarios .sc-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  color: var(--color-ink);
  text-decoration: none;
  transition: background-color 160ms ease-out, border-color 160ms ease-out;
}

.page-scenarios .sc-card:hover,
.page-scenarios .sc-card:focus-visible {
  background: var(--color-surface);
  border-color: var(--color-primary);
}

.page-scenarios .sc-card:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-scenarios .sc-card__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-scenarios .sc-card__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-ink);
}

.page-scenarios .sc-card__time {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-scenarios .sc-card__entry {
  margin-top: auto;
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-soft);
}

@media (min-width: 1024px) {
  .page-scenarios .sc-hero__stage {
    grid-template-columns: 7fr 5fr;
    gap: var(--gutter);
    align-items: start;
  }

  .page-scenarios .sc-hero__figure {
    aspect-ratio: auto;
    height: 100%;
    min-height: calc(var(--space-8) * 6);
  }

  .page-scenarios .sc-hero__cards {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-scenarios .sc-hero__card:nth-child(1) {
    grid-column: 1 / 5;
  }

  .page-scenarios .sc-hero__card:nth-child(2) {
    grid-column: 5 / 7;
  }

  .page-scenarios .sc-hero__card:nth-child(3) {
    grid-column: 1 / 3;
  }

  .page-scenarios .sc-hero__card:nth-child(4) {
    grid-column: 3 / 7;
  }

  .page-scenarios .sc-hero__card:nth-child(1) .sc-card {
    min-height: calc(var(--space-8) * 3);
  }

  .page-scenarios .sc-hero__card:nth-child(2) .sc-card {
    min-height: calc(var(--space-8) * 4);
  }

  .page-scenarios .sc-hero__card:nth-child(3) .sc-card {
    min-height: calc(var(--space-8) * 2.5);
  }

  .page-scenarios .sc-hero__card:nth-child(4) .sc-card {
    min-height: calc(var(--space-8) * 3.5);
  }
}

/* ---------- 区块小标题 ---------- */

.page-scenarios .sc-head {
  max-width: 68ch;
  margin-bottom: var(--space-6);
}

.page-scenarios .sc-head__title {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

.page-scenarios .sc-head__note {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 四组定位 ---------- */

.page-scenarios .sc-groups__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.page-scenarios .sc-group {
  position: relative;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-scenarios .sc-group::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: var(--space-6);
  height: 3px;
  background: var(--color-accent);
}

.page-scenarios .sc-group__num {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-scenarios .sc-group__name {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  letter-spacing: 0.08em;
  color: var(--color-ink);
}

.page-scenarios .sc-group__desc {
  margin: 0 0 var(--space-2);
  max-width: 52ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-group__who {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-ink-muted);
}

@media (min-width: 1024px) {
  .page-scenarios .sc-groups__list {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-6) var(--gutter);
  }

  .page-scenarios .sc-group:nth-child(1) {
    grid-column: 1 / 7;
  }

  .page-scenarios .sc-group:nth-child(2) {
    grid-column: 8 / 13;
  }

  .page-scenarios .sc-group:nth-child(3) {
    grid-column: 1 / 6;
  }

  .page-scenarios .sc-group:nth-child(4) {
    grid-column: 6 / 13;
  }
}

/* ---------- 介入点折线 ---------- */

.page-scenarios .sc-tl__wrap {
  margin-top: var(--space-6);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-scenarios .sc-tl__hint {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-scenarios .sc-tl__svg {
  display: block;
  width: 100%;
  min-width: 680px;
  height: auto;
}

.page-scenarios .sc-tl__grid line {
  stroke: var(--color-line);
  stroke-width: 1;
}

.page-scenarios .sc-tl__line {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2;
  stroke-dasharray: 8 6;
}

.page-scenarios .sc-tl__node circle {
  fill: var(--color-surface);
  stroke: var(--color-accent);
  stroke-width: 3;
  transition: fill 160ms ease-out, stroke 160ms ease-out;
}

.page-scenarios .sc-tl__node:hover circle,
.page-scenarios .sc-tl__node:focus-visible circle {
  fill: var(--color-accent);
  stroke: var(--color-accent);
}

.page-scenarios .sc-tl__node:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-scenarios .sc-tl__node text {
  font-family: var(--font-mono);
  transition: fill 160ms ease-out;
}

.page-scenarios .sc-tl__name {
  font-size: var(--text-sm);
  fill: var(--color-ink);
  letter-spacing: 0.06em;
}

.page-scenarios .sc-tl__meta {
  font-size: var(--text-xs);
  fill: var(--color-ink-muted);
}

.page-scenarios .sc-tl__node:hover .sc-tl__name,
.page-scenarios .sc-tl__node:focus-visible .sc-tl__name {
  fill: var(--color-accent);
}

@media (min-width: 1024px) {
  .page-scenarios .sc-tl__wrap {
    padding: var(--space-4);
  }

  .page-scenarios .sc-tl__hint {
    display: none;
  }

  .page-scenarios .sc-tl__svg {
    min-width: 0;
  }
}

/* ---------- 12 条用法 ---------- */

.page-scenarios .sc-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.page-scenarios .sc-panel {
  outline: none;
}

.page-scenarios .sc-panel__lead {
  margin: 0 0 var(--space-4);
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-panel + .sc-panel {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-scenarios .sc-panel__grid {
  display: grid;
  gap: var(--space-4);
}

.page-scenarios .sc-panel__media {
  margin: 0;
  align-self: start;
}

.page-scenarios .sc-panel__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-scenarios .sc-entries {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-scenarios .sc-entry {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-scenarios .sc-entry:first-child {
  padding-top: 0;
}

.page-scenarios .sc-entry:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-scenarios .sc-entry__num {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
}

.page-scenarios .sc-entry__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

.page-scenarios .sc-entry__q {
  margin: 0 0 var(--space-2);
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-accent);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-entry__do {
  margin: 0 0 var(--space-2);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-scenarios .sc-entry__where {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-entry__where a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary-soft);
}

.page-scenarios .sc-entry__where a:hover,
.page-scenarios .sc-entry__where a:focus-visible {
  border-bottom-color: var(--color-primary);
  letter-spacing: 0.02em;
}

.page-scenarios .sc-entry__where a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-scenarios .sc-entry__aside {
  display: grid;
  gap: var(--space-1);
  align-content: start;
}

.page-scenarios .sc-note {
  margin: 0;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink);
}

.page-scenarios .sc-note--time {
  background: var(--color-primary-soft);
}

.page-scenarios .sc-note--cond {
  background: var(--color-highlight);
}

@media (min-width: 768px) {
  .page-scenarios .sc-entry {
    grid-template-columns: minmax(0, 1fr) 210px;
    gap: var(--space-3) var(--space-4);
  }
}

@media (min-width: 1024px) {
  .page-scenarios .sc-panel__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-scenarios .sc-panel__media {
    grid-column: 1 / 5;
  }

  .page-scenarios .sc-entries {
    grid-column: 5 / 13;
  }

  .page-scenarios .sc-entry {
    grid-template-columns: minmax(0, 1fr) 200px;
  }
}

/* ---------- 衔接 ---------- */

.page-scenarios .sc-flow {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-scenarios .sc-flow__grid {
  display: grid;
  gap: var(--space-4);
}

.page-scenarios .sc-flow__eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.page-scenarios .sc-flow__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: 0.02em;
  color: var(--color-contrast-ink);
}

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

.page-scenarios .sc-flow__steps li {
  display: grid;
  gap: var(--space-1);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-scenarios .sc-flow__steps li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-scenarios .sc-flow__num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
}

.page-scenarios .sc-flow__steps p {
  margin: 0;
  max-width: 60ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

@media (min-width: 640px) {
  .page-scenarios .sc-flow__steps li {
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
  }
}

@media (min-width: 1024px) {
  .page-scenarios .sc-flow__grid {
    grid-template-columns: 5fr 7fr;
    gap: var(--gutter);
    align-items: start;
  }
}

/* ---------- 出口 ---------- */

.page-scenarios .sc-exit__grid {
  display: grid;
  gap: var(--space-3);
}

.page-scenarios .sc-exit__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  transition: border-color 160ms ease-out;
}

.page-scenarios .sc-exit__item:hover {
  border-color: var(--color-accent);
}

.page-scenarios .sc-exit__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-scenarios .sc-exit__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: 0.04em;
  color: var(--color-ink);
}

.page-scenarios .sc-exit__text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-exit__item .btn {
  align-self: flex-start;
  margin-top: auto;
}

.page-scenarios .sc-exit__back {
  margin: var(--space-6) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-exit__back a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary-soft);
}

.page-scenarios .sc-exit__back a:hover,
.page-scenarios .sc-exit__back a:focus-visible {
  border-bottom-color: var(--color-primary);
}

.page-scenarios .sc-exit__back a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

@media (min-width: 768px) {
  .page-scenarios .sc-exit__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-scenarios .sc-exit__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-scenarios .sc-exit__item:nth-child(1) {
    grid-column: 1 / 5;
  }

  .page-scenarios .sc-exit__item:nth-child(2) {
    grid-column: 5 / 9;
  }

  .page-scenarios .sc-exit__item:nth-child(3) {
    grid-column: 9 / 13;
  }
}

/* ---------- 动效与无障碍 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-scenarios .sc-card,
  .page-scenarios .sc-tl__node circle,
  .page-scenarios .sc-tl__node text,
  .page-scenarios .sc-exit__item {
    transition: none;
  }
}
<<<END>>>