.page-start-checklist {
  --cl-line: var(--color-line);
  --cl-indent: calc(var(--space-6) + var(--space-2));
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-start-checklist .type-h2 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0;
}

/* 首屏 */
.page-start-checklist .cl-hero {
  padding-block: var(--space-6) var(--space-8);
}

.page-start-checklist .cl-hero__grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-start-checklist .cl-hero__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

.page-start-checklist .cl-hero__lede {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-start-checklist .cl-hero__figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-top: var(--space-3);
}

.page-start-checklist .cl-hero__figure .figure-num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-primary);
}

.page-start-checklist .cl-hero__figure-label {
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-ink);
}

.page-start-checklist .cl-hero__figure-note {
  max-width: 28ch;
  color: var(--color-ink-muted);
}

.page-start-checklist .cl-hero__media {
  margin-top: var(--space-8);
}

.page-start-checklist .media {
  margin: var(--space-4) 0 0;
}

.page-start-checklist .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-start-checklist .media-caption {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-start-checklist .cl-scale {
  margin-top: var(--space-6);
  height: var(--space-6);
  background-image: linear-gradient(to right, var(--cl-line) 0 1px, transparent 1px);
  background-size: calc(100% / 12) 100%;
  background-repeat: repeat-x;
}

/* 定位说明 */
.page-start-checklist .cl-scope__grid {
  display: grid;
  gap: var(--space-6);
}

.page-start-checklist .cl-scope__title {
  margin-top: var(--space-2);
}

.page-start-checklist .cl-scope__main p {
  margin-top: var(--space-4);
}

.page-start-checklist .cl-scope__aside {
  padding: var(--space-4);
  background: var(--color-surface-alt);
}

.page-start-checklist .cl-aside__label {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-start-checklist .cl-scope__aside p:last-child {
  margin: 0;
  color: var(--color-ink-soft);
}

/* 检查项分组 */
.page-start-checklist .cl-checks__title {
  margin-top: var(--space-2);
}

.page-start-checklist .cl-checks__intro {
  margin-top: var(--space-4);
  color: var(--color-ink-soft);
}

.page-start-checklist .cl-group {
  margin-top: var(--space-8);
}

.page-start-checklist .cl-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--cl-line);
}

.page-start-checklist .cl-group__name {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-start-checklist .cl-group__meta {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-start-checklist .cl-group__intro {
  margin: var(--space-4) 0 0;
  color: var(--color-ink-soft);
}

.page-start-checklist .cl-group__inner {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-start-checklist .cl-group__media {
  margin: 0;
}

.page-start-checklist .cl-group__media.media {
  margin-top: 0;
}

/* 单项检查 */
.page-start-checklist .check-item {
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--cl-line);
}

.page-start-checklist .check-item__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  align-items: baseline;
  cursor: pointer;
  list-style: none;
}

.page-start-checklist .check-item__head::-webkit-details-marker {
  display: none;
}

.page-start-checklist .check-item__head:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: var(--space-1);
}

.page-start-checklist .check-item__num {
  font-size: var(--text-lg);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-start-checklist .check-item__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-start-checklist .check-item__toggle {
  grid-column: 2;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-start-checklist .check-item__toggle::after {
  content: " ＋";
}

.page-start-checklist .check-item[open] .check-item__toggle::after {
  content: " －";
}

.page-start-checklist .check-item__point {
  grid-column: 2;
  display: block;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-start-checklist .check-item__body {
  margin-top: var(--space-3);
}

.page-start-checklist .check-item__why {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-start-checklist .check-item__why-label {
  margin-right: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-start-checklist .check-item__notes {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0 0;
}

.page-start-checklist .check-item__note {
  margin: 0;
  padding: var(--space-3);
  background: var(--color-surface-alt);
}

.page-start-checklist .check-item__note--fail {
  background: var(--color-surface-deep);
}

.page-start-checklist .check-item__note dt {
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-start-checklist .check-item__note dd {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink);
}

/* 适用与边界 */
.page-start-checklist .cl-fit__grid {
  display: grid;
  gap: var(--space-8);
}

.page-start-checklist .cl-fit__title {
  margin: 0;
}

.page-start-checklist .cl-fit__list {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.page-start-checklist .cl-fit__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--cl-line);
}

.page-start-checklist .cl-fit__mark {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-start-checklist .cl-fit__text {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink);
}

/* 深色收束带 */
.page-start-checklist .cl-cta {
  padding-block: var(--space-8);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-start-checklist .cl-cta__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.page-start-checklist .cl-cta__eyebrow {
  color: var(--color-contrast-accent);
}

.page-start-checklist .cl-cta__lead {
  margin: 0;
  max-width: var(--measure);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

/* 相邻主题索引 */
.page-start-checklist .cl-next__title {
  margin-top: var(--space-2);
}

.page-start-checklist .cl-index {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.page-start-checklist .cl-index .index-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  align-items: baseline;
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--cl-line);
}

.page-start-checklist .cl-index .index-row__meta {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-start-checklist .cl-index .index-row__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  text-decoration: none;
}

.page-start-checklist .cl-index .index-row__fields {
  grid-column: 2;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-start-checklist .cl-index .index-row__route {
  grid-column: 2;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-start-checklist .cl-index .index-row:hover .index-row__route,
.page-start-checklist .cl-index .index-row:focus-within .index-row__route {
  color: var(--color-accent);
}

/* 平板及以上 */
@media (min-width: 720px) {
  .page-start-checklist .check-item__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-start-checklist .cl-fit__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-start-checklist .cl-index .index-row {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .page-start-checklist .cl-index .index-row__title {
    grid-column: 2;
  }

  .page-start-checklist .cl-index .index-row__fields {
    grid-column: 2;
  }

  .page-start-checklist .cl-index .index-row__route {
    grid-column: 3;
    grid-row: 1;
  }
}

/* 桌面 */
@media (min-width: 900px) {
  .page-start-checklist .cl-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-start-checklist .cl-hero__figure {
    padding-top: var(--space-8);
    align-items: flex-end;
    text-align: right;
  }

  .page-start-checklist .cl-hero__figure-note {
    text-align: right;
  }

  .page-start-checklist .cl-scope__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-start-checklist .check-item__head {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .page-start-checklist .check-item__num {
    grid-row: 1;
  }

  .page-start-checklist .check-item__title {
    grid-column: 2;
    grid-row: 1;
  }

  .page-start-checklist .check-item__toggle {
    grid-column: 3;
    grid-row: 1;
  }

  .page-start-checklist .check-item__point {
    grid-column: 2 / 4;
  }

  .page-start-checklist .check-item__body {
    padding-inline-start: var(--cl-indent);
  }

  .page-start-checklist .cl-group__inner--with-media {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-start-checklist .cl-group__inner--with-media .cl-group__media {
    position: sticky;
    top: var(--space-6);
  }

  .page-start-checklist .cl-cta__inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-6);
  }

  .page-start-checklist .cl-cta__eyebrow {
    flex-basis: 100%;
  }
}