.page-scenarios {
  --sc-stripe: repeating-linear-gradient(36deg,
      var(--color-primary) 0 8px,
      color-mix(in srgb, var(--color-surface) 86%, var(--color-primary)) 8px 16px);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: var(--leading-body);
  overflow-x: hidden;
}

.page-scenarios h2,
.page-scenarios h3 {
  font-family: var(--font-heading);
  color: var(--color-ink);
  letter-spacing: var(--tracking-heading);
}

.page-scenarios a {
  color: var(--color-primary);
}

.page-scenarios a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 首屏 ---------- */

.page-scenarios .sc-hero {
  position: relative;
  background: var(--color-surface);
  padding-block: var(--space-6) var(--section-y);
}

.page-scenarios .sc-hero::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 8px;
  background-image: var(--sc-stripe);
  opacity: 0.85;
}

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

.page-scenarios .sc-kicker {
  margin: 0;
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--color-accent);
}

.page-scenarios .sc-title {
  position: relative;
  margin: var(--space-2) 0 var(--space-3);
  padding-left: clamp(22px, 3.4vw, 38px);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-scenarios .sc-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.08em;
  width: clamp(10px, 1.3vw, 15px);
  height: 1.55em;
  border-radius: var(--radius-pill);
  background-image: var(--sc-stripe);
}

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

.page-scenarios .sc-figures {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.page-scenarios .sc-fig {
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary-soft);
}

.page-scenarios .sc-fig-num {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-primary);
}

.page-scenarios .sc-fig-num small {
  margin-left: 4px;
  font-size: var(--text-lg);
  font-weight: var(--weight-body);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-fig-cap {
  display: block;
  margin-top: var(--space-1);
  max-width: 36ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-hero-figure {
  display: flex;
  flex-direction: column;
  margin: 0;
  gap: var(--space-2);
}

.page-scenarios .sc-hero-media {
  flex: 1;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-2);
}

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

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

/* ---------- 跳转条 ---------- */

.page-scenarios .sc-jump {
  background: var(--color-surface-alt);
  padding-block: var(--space-4);
  border-block: var(--border-thin) dashed var(--color-line);
}

.page-scenarios .sc-jump-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
}

.page-scenarios .sc-jump-label {
  margin: 0;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-muted);
}

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

.page-scenarios .sc-jump-list a {
  display: inline-block;
  padding: 9px 18px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}

.page-scenarios .sc-jump-list a:hover {
  background: var(--color-highlight);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ---------- 通用场景组 ---------- */

.page-scenarios .sc-group {
  padding-block: var(--section-y);
  background: var(--color-surface);
}

.page-scenarios .sc-chapter {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.page-scenarios .chapter-index {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-accent);
}

.page-scenarios .chapter-title {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-scenarios .sc-group-note {
  margin: 0 0 var(--space-6);
  max-width: var(--measure);
}

/* ---------- 场景条目 ---------- */

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

.page-scenarios .sc-item + .sc-item {
  padding-top: var(--space-6);
  border-top: var(--border-thin) dashed var(--color-line);
}

.page-scenarios .sc-item-num {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-accent);
}

.page-scenarios .sc-item-for {
  display: inline-block;
  margin: 0 0 var(--space-2);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-ink);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

.page-scenarios .sc-item-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-scenarios .sc-item-lead {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-scenarios .sc-item-facts {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-3);
  display: grid;
  gap: 7px;
  font-size: var(--text-sm);
}

.page-scenarios .sc-steps {
  margin: 0;
  padding-left: var(--space-4);
  display: grid;
  gap: 7px;
  font-size: var(--text-sm);
}

.page-scenarios .sc-steps a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 展开组件 ---------- */

.page-scenarios .disclosure {
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--color-line) 70%, transparent);
  transition: background-color 220ms ease, box-shadow 220ms ease;
}

.page-scenarios .disclosure[data-open] {
  background: var(--color-primary-soft);
  box-shadow: inset 4px 0 0 var(--color-primary);
}

.page-scenarios .disclosure-trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: none;
  border: 0;
  font: inherit;
  font-weight: 600;
  color: var(--color-ink);
  text-align: left;
  cursor: pointer;
}

.page-scenarios .disclosure-trigger:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.page-scenarios .disclosure-panel {
  padding: 0 var(--space-3) var(--space-3);
}

/* ---------- 分栏组 ---------- */

.page-scenarios .sc-split {
  display: grid;
  gap: var(--space-6);
}

.page-scenarios .sc-split-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

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

/* ---------- 深色时间轴 ---------- */

.page-scenarios .sc-timeline {
  position: relative;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--section-y);
  overflow: hidden;
}

.page-scenarios .sc-timeline::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 8px;
  background-image: repeating-linear-gradient(36deg,
      var(--color-contrast-accent) 0 8px,
      transparent 8px 16px);
  opacity: 0.75;
}

.page-scenarios .sc-tl-head {
  margin-bottom: var(--space-6);
}

.page-scenarios .sc-tl-kicker {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.page-scenarios .sc-pulse {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-contrast-accent);
  flex: none;
}

.page-scenarios .sc-tl-title {
  margin: 0;
  max-width: 26ch;
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-scenarios .sc-tl-line {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: var(--space-3);
  color: var(--color-contrast-line);
}

.page-scenarios .sc-tl-line circle {
  fill: var(--color-contrast-accent);
}

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

.page-scenarios .sc-tl-node {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border-top: var(--border-thin) dashed var(--color-contrast-line);
  background: color-mix(in srgb, var(--color-contrast-ink) 8%, transparent);
  transition: background-color 220ms ease, transform 220ms ease;
}

.page-scenarios .sc-tl-node:hover {
  background: color-mix(in srgb, var(--color-contrast-ink) 16%, transparent);
  transform: translateY(-2px);
}

.page-scenarios .sc-tl-time {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-accent);
}

.page-scenarios .sc-tl-what {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
  color: var(--color-contrast-ink);
}

.page-scenarios .sc-tl-sample {
  margin: 0;
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
}

/* ---------- 长期跟踪横幅 ---------- */

.page-scenarios .sc-banner {
  position: relative;
  margin: 0 0 var(--space-6);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-scenarios .sc-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 5;
  object-fit: cover;
}

.page-scenarios .sc-banner-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}

.page-scenarios .sc-banner-tag {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--color-contrast-accent);
}

.page-scenarios .sc-banner-title {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

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

/* ---------- 起步出口 ---------- */

.page-scenarios .sc-start {
  background: var(--color-surface);
  padding-block: var(--section-y-lg) var(--section-y);
}

.page-scenarios .sc-start-bar {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-1);
}

.page-scenarios .sc-start-copy h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-primary-ink);
}

.page-scenarios .sc-start-copy p {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  color: var(--color-primary-ink);
}

.page-scenarios .sc-start-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-scenarios .sc-btn-solid,
.page-scenarios .sc-btn-line {
  display: inline-block;
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}

.page-scenarios .sc-btn-solid {
  background: var(--color-primary-ink);
  color: var(--color-primary);
}

.page-scenarios .sc-btn-solid:hover {
  background: var(--color-highlight);
  color: var(--color-primary);
}

.page-scenarios .sc-btn-line {
  background: transparent;
  color: var(--color-primary-ink);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary-ink) 65%, transparent);
}

.page-scenarios .sc-btn-line:hover {
  background: var(--color-highlight);
  color: var(--color-primary);
  border-color: var(--color-highlight);
}

.page-scenarios .sc-entries {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-scenarios .sc-entries a {
  display: block;
  height: 100%;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border-bottom: var(--border-thin) dashed var(--color-line);
  background: var(--color-surface-alt);
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background-color 200ms ease, color 200ms ease;
}

.page-scenarios .sc-entries a:hover {
  background: var(--color-highlight);
  color: var(--color-primary);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-scenarios .sc-fig--2 {
    margin-left: var(--space-6);
  }

  .page-scenarios .sc-fig--3 {
    margin-left: calc(var(--space-8) + var(--space-2));
  }

  .page-scenarios .sc-tl-nodes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-scenarios .sc-start-bar {
    padding: var(--space-8);
  }

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

  .page-scenarios .sc-banner-overlay {
    padding: var(--space-6);
  }

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

@media (min-width: 860px) {
  .page-scenarios .sc-list--offset .sc-item {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-scenarios .sc-list--offset .sc-item-num {
    margin-bottom: 0;
  }

  .page-scenarios .sc-start-bar {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
    gap: var(--space-8);
  }

  .page-scenarios .sc-start-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-scenarios .sc-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-8);
    align-items: stretch;
  }

  .page-scenarios .sc-hero-media {
    aspect-ratio: auto;
    min-height: 440px;
  }

  .page-scenarios .sc-split {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-scenarios .sc-split--reverse {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-scenarios .sc-split--reverse .sc-split-media {
    order: 2;
  }

  .page-scenarios .sc-tl-nodes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-3);
  }
}

@media (min-width: 1000px) {
  .page-scenarios .sc-list--pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-8);
  }

  .page-scenarios .sc-list--pair .sc-item + .sc-item {
    padding-top: 0;
    border-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-scenarios .sc-jump-list a,
  .page-scenarios .sc-tl-node,
  .page-scenarios .disclosure,
  .page-scenarios .sc-btn-solid,
  .page-scenarios .sc-btn-line,
  .page-scenarios .sc-entries a {
    transition: none;
  }

  .page-scenarios .sc-tl-node:hover {
    transform: none;
  }
}