.page-scenarios {
  background: var(--color-surface);
  color: var(--color-ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-scenarios .sc-hero {
  position: relative;
  padding: calc(var(--space-8) * 1.3) 0 var(--space-8);
  background:
    radial-gradient(115% 78% at 12% 0%, color-mix(in srgb, var(--color-primary) 16%, transparent) 0%, transparent 60%),
    radial-gradient(90% 60% at 96% 8%, color-mix(in srgb, var(--color-accent) 10%, transparent) 0%, transparent 58%),
    linear-gradient(180deg, var(--color-surface) 0%, var(--color-surface-alt) 100%);
}

.page-scenarios .sc-hero::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-primary) 35%, var(--color-primary) 65%, transparent 100%);
  opacity: 0.65;
}

.page-scenarios .sc-crumb-current {
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.page-scenarios .sc-hero__title {
  margin: var(--space-3) 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.04;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 18ch;
}

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

.page-scenarios .sc-figs {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-scenarios .sc-fig {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
}

.page-scenarios .sc-fig__value {
  font-size: var(--text-figure);
  line-height: 0.94;
  font-weight: var(--weight-heading);
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.page-scenarios .sc-fig__label {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
}

/* ---------- 首屏刻度带 ---------- */
.page-scenarios .sc-band {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
}

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

.page-scenarios .sc-band__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: var(--space-2);
  row-gap: var(--space-1);
  align-items: baseline;
  padding: var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface-deep) 55%, transparent);
  text-decoration: none;
  color: var(--color-ink);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.page-scenarios .sc-band__link:hover,
.page-scenarios .sc-band__link:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-1);
  transform: translateY(-2px);
}

.page-scenarios .sc-band__link[aria-current="true"] {
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary-soft) 70%, transparent);
}

.page-scenarios .sc-band__num {
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.page-scenarios .sc-band__label {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
}

.page-scenarios .sc-band__meta {
  grid-column: 2;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-scenarios .sc-band__link .meter {
  grid-column: 2;
  margin-top: var(--space-1);
}

/* ---------- 章节定位条 ---------- */
.page-scenarios .sc-nav {
  background: color-mix(in srgb, var(--color-surface-alt) 92%, transparent);
  border-bottom: 1px solid var(--color-line);
}

.page-scenarios .sc-nav .section-nav__list {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-2);
  overflow-x: auto;
  padding-block: var(--space-2);
  margin: 0;
  list-style: none;
  scrollbar-width: thin;
}

.page-scenarios .sc-nav .section-nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  white-space: nowrap;
  padding: 6px var(--space-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-scenarios .sc-nav .section-nav__link:hover,
.page-scenarios .sc-nav .section-nav__link:focus-visible {
  color: var(--color-ink);
  border-color: var(--color-primary);
}

.page-scenarios .sc-nav .section-nav__link[aria-current="true"] {
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.page-scenarios .sc-nav .section-nav__num {
  font-size: var(--text-xs);
  opacity: 0.85;
}

/* ---------- 场景分组 ---------- */
.page-scenarios .sc-group {
  scroll-margin-top: var(--space-6);
}

.page-scenarios .sc-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: var(--space-3);
  row-gap: var(--space-2);
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-scenarios .sc-group__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-size: var(--text-2xl);
  line-height: 0.9;
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

.page-scenarios .sc-group__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

.page-scenarios .sc-group__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

/* ---------- 情境卡 ---------- */
.page-scenarios .sc-cases {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-scenarios .sc-case {
  position: relative;
  padding: var(--space-3) var(--space-2) var(--space-3) var(--space-3);
  border-bottom: 1px dashed var(--color-line);
  border-left: 2px solid transparent;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-scenarios .sc-case:first-child {
  border-top: 1px dashed var(--color-line);
}

.page-scenarios .sc-case:hover,
.page-scenarios .sc-case:focus-within {
  border-left-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-surface-deep) 42%, transparent);
}

.page-scenarios .sc-case__no {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.14em;
}

.page-scenarios .sc-case__title {
  margin: var(--space-1) 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-scenarios .sc-case__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-case__meta {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
  letter-spacing: 0.02em;
}

.page-scenarios .sc-case__path {
  position: relative;
  display: inline-block;
  padding-bottom: 3px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 42%, transparent);
  transition: border-color 160ms ease, color 160ms ease;
}

.page-scenarios .sc-case__path::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 1px;
  width: 100%;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}

.page-scenarios .sc-case:hover .sc-case__path::after,
.page-scenarios .sc-case__path:focus-visible::after {
  transform: scaleX(1);
}

.page-scenarios .sc-case__path:hover,
.page-scenarios .sc-case__path:focus-visible {
  color: var(--color-ink);
  border-bottom-color: transparent;
}

/* ---------- 旁注与要点 ---------- */
.page-scenarios .sc-group__aside {
  display: grid;
  gap: var(--space-4);
  align-content: start;
}

.page-scenarios .sc-group__figure {
  margin: 0;
}

.page-scenarios .sc-group__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  filter: saturate(0.72) contrast(1.06);
}

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

.page-scenarios .sc-points__item {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-scenarios .sc-points__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: var(--space-2);
  height: 1px;
  background: var(--color-accent);
}

.page-scenarios .sc-points--framed {
  padding: var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-surface-alt) 80%, transparent);
}

/* ---------- 引用分组面板 ---------- */
.page-scenarios .sc-panel {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
}

.page-scenarios .sc-cases--plain .sc-case {
  padding-inline: 0;
  border-left: none;
  background: none;
}

.page-scenarios .sc-cases--plain .sc-case:first-child {
  border-top: none;
}

.page-scenarios .sc-cases--plain .sc-case:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-scenarios .sc-inline-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-scenarios .sc-inline-link:hover,
.page-scenarios .sc-inline-link:focus-visible {
  color: var(--color-accent);
}

/* ---------- 返回索引 ---------- */
.page-scenarios .sc-return__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-scenarios .sc-return__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: var(--space-3);
  row-gap: var(--space-1);
  align-items: baseline;
  padding: var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface-deep) 48%, transparent);
  text-decoration: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.page-scenarios .sc-return__link:hover,
.page-scenarios .sc-return__link:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-1);
}

.page-scenarios .sc-return__num {
  grid-row: 1 / span 2;
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.1em;
}

.page-scenarios .sc-return__name {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-scenarios .sc-return__desc {
  grid-column: 2;
  font-size: var(--text-base);
  color: var(--color-ink-muted);
}

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

/* ---------- 焦点可见 ---------- */
.page-scenarios a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-scenarios .sc-figs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-scenarios .sc-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-scenarios .sc-return__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-scenarios .sc-figs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-scenarios .sc-band {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-scenarios .sc-band__link {
    grid-template-columns: minmax(0, 1fr);
    row-gap: var(--space-1);
  }

  .page-scenarios .sc-band__num {
    grid-column: 1;
  }

  .page-scenarios .sc-band__meta,
  .page-scenarios .sc-band__link .meter {
    grid-column: 1;
  }

  .page-scenarios .sc-group__body {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-scenarios .sc-group--flip .sc-group__main {
    order: 2;
  }

  .page-scenarios .sc-group--flip .sc-group__aside {
    order: 1;
  }

  .page-scenarios .sc-group__title {
    font-size: var(--text-2xl);
  }

  .page-scenarios .sc-return__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-scenarios .sc-band__link {
    padding: var(--space-4) var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-scenarios .sc-band__link,
  .page-scenarios .sc-case,
  .page-scenarios .sc-case__path::after,
  .page-scenarios .sc-return__link {
    transition: none;
  }

  .page-scenarios .sc-band__link:hover,
  .page-scenarios .sc-band__link:focus-visible {
    transform: none;
  }
}