.page-start-checklist {
  --cl-line: var(--color-line);
  --cl-text: var(--color-ink);
  --cl-dim: var(--color-ink-soft);
  --cl-accent: var(--color-primary);
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

/* ---------- 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-6);
}

.page-start-checklist .cl-hero__title {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

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

.page-start-checklist .cl-hero__lede a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: var(--border-thick);
}

.page-start-checklist .cl-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-4) 0 0;
  padding: var(--space-2) 0 0;
  border-top: var(--border-thin) solid var(--color-line);
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
}

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

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

@media (min-width: 900px) {
  .page-start-checklist .cl-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: end;
    column-gap: var(--space-8);
  }

  .page-start-checklist .cl-hero__title {
    font-size: var(--text-4xl);
  }
}

/* ---------- 定位说明 ---------- */

.page-start-checklist .cl-intro {
  padding-block: var(--space-8);
  background: var(--color-surface-alt);
}

.page-start-checklist .cl-intro__grid {
  display: grid;
  gap: var(--space-4);
}

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

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

.page-start-checklist .cl-intro__body p + p {
  margin-top: var(--space-3);
}

.page-start-checklist .pullquote {
  margin: var(--space-4) 0 0;
  padding-left: var(--space-4);
  border-left: var(--border-thick) solid var(--color-primary);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  text-indent: -0.5em;
}

@media (min-width: 900px) {
  .page-start-checklist .cl-intro__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    column-gap: var(--space-8);
    align-items: start;
  }
}

/* ---------- 分组色块 ---------- */

.page-start-checklist .cl-group {
  padding-block: var(--section-y);
}

.page-start-checklist .cl-group--deep {
  --cl-line: var(--color-contrast-line);
  --cl-text: var(--color-contrast-ink);
  --cl-dim: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
  --cl-accent: var(--color-contrast-accent);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-start-checklist .cl-group--primary {
  --cl-line: color-mix(in srgb, var(--color-primary-ink) 42%, var(--color-primary));
  --cl-text: var(--color-primary-ink);
  --cl-dim: var(--color-primary-ink);
  --cl-accent: var(--color-primary-ink);
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-start-checklist .cl-group__head {
  display: grid;
  gap: var(--space-2);
  align-items: baseline;
  margin: 0 0 var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: var(--border-thick) solid var(--cl-line);
}

.page-start-checklist .cl-group__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cl-accent);
}

.page-start-checklist .cl-group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  color: var(--cl-text);
}

.page-start-checklist .cl-group__lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--cl-dim);
}

.page-start-checklist .cl-group__figure {
  margin: 0 0 var(--space-6);
  max-width: 900px;
}

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

.page-start-checklist .media-frame__caption {
  color: var(--cl-dim);
}

@media (min-width: 900px) {
  .page-start-checklist .cl-group {
    padding-block: var(--section-y-lg);
  }

  .page-start-checklist .cl-group__head {
    grid-template-columns: auto minmax(0, 4fr) minmax(0, 6fr);
    column-gap: var(--space-6);
  }
}

/* ---------- 核对项清单 ---------- */

.page-start-checklist .cl-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--cl-line);
}

.page-start-checklist .cl-item {
  display: grid;
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-bottom: var(--border-thin) solid var(--cl-line);
}

.page-start-checklist .cl-item__lead {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-left: var(--space-2);
  border-left: var(--border-thick) solid transparent;
  transition: border-color 140ms linear;
}

.page-start-checklist .cl-item:has(.cl-item__input:checked) .cl-item__lead {
  border-left-color: var(--cl-accent);
}

.page-start-checklist .cl-item__input {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: var(--space-3);
  height: var(--space-3);
  margin: 0;
  border: var(--border-thick) solid currentColor;
  border-radius: 0;
  background: transparent;
  display: grid;
  place-content: center;
  cursor: pointer;
}

.page-start-checklist .cl-item__input::before {
  content: "";
  width: 55%;
  height: 55%;
  background: var(--cl-accent);
  transform: scale(0);
  transition: transform 140ms linear;
}

.page-start-checklist .cl-item__input:checked::before {
  transform: scale(1);
}

.page-start-checklist .cl-item__input:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: var(--border-thick);
}

.page-start-checklist .cl-group--deep .cl-item__input:focus-visible,
.page-start-checklist .cl-group--primary .cl-item__input:focus-visible {
  outline-color: var(--cl-accent);
}

.page-start-checklist .cl-item__label {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  min-height: var(--space-3);
  cursor: pointer;
}

.page-start-checklist .cl-item__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--cl-dim);
}

.page-start-checklist .cl-item__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-lg);
  line-height: 1.15;
  color: var(--cl-text);
  transition: color 140ms linear;
}

.page-start-checklist .cl-item:has(.cl-item__input:checked) .cl-item__title {
  color: var(--cl-accent);
}

.page-start-checklist .cl-item__body {
  max-width: var(--measure);
}

.page-start-checklist .cl-item__body p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--cl-dim);
}

.page-start-checklist .cl-item__alt {
  margin: var(--space-3) 0 0;
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--cl-accent);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--cl-dim);
}

.page-start-checklist .cl-item__alt-label {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--cl-accent);
}

.page-start-checklist .cl-item__figure {
  margin: var(--space-4) 0 0;
  max-width: 400px;
}

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

@media (min-width: 860px) {
  .page-start-checklist .cl-item {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    column-gap: var(--space-6);
    align-items: start;
  }
}

/* ---------- 自检表 ---------- */

.page-start-checklist .cl-check {
  padding-block: var(--section-y);
  background: var(--color-surface);
}

.page-start-checklist .cl-check__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
}

.page-start-checklist .cl-check__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-6);
  color: var(--color-ink-soft);
}

.page-start-checklist .cl-table-scroll {
  overflow-x: auto;
}

.page-start-checklist .cl-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

.page-start-checklist .cl-table__caption {
  caption-side: top;
  padding: 0 0 var(--space-2);
  text-align: left;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-start-checklist .cl-table th,
.page-start-checklist .cl-table td {
  padding: var(--space-3);
  text-align: left;
  vertical-align: top;
  border-bottom: var(--border-thin) solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-start-checklist .cl-table thead th {
  background: var(--color-surface-deep);
  border-bottom: var(--border-thick) solid var(--color-ink);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink);
}

.page-start-checklist .cl-table tbody th {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-ink);
  border-left: var(--border-thick) solid var(--color-primary);
}

.page-start-checklist .cl-table tbody td {
  color: var(--color-ink-soft);
}

.page-start-checklist .cl-table tbody tr:hover {
  background: var(--color-surface-alt);
}

/* ---------- 相邻入口 ---------- */

.page-start-checklist .cl-next {
  padding-block: var(--section-y);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-start-checklist .cl-next__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-start-checklist .cl-next__lede {
  max-width: var(--measure);
  margin: var(--space-2) 0 0;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
}

.page-start-checklist .cl-next__list {
  list-style: none;
  display: grid;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-start-checklist .cl-next__item {
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-start-checklist .cl-next__link {
  display: block;
  padding: var(--space-4);
  text-decoration: none;
  color: inherit;
  transition: background-color 140ms linear, color 140ms linear;
}

.page-start-checklist .cl-next__link:hover,
.page-start-checklist .cl-next__link:focus-visible {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  outline: none;
}

.page-start-checklist .cl-next__kicker {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}

.page-start-checklist .cl-next__name {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-lg);
  line-height: 1.2;
}

.page-start-checklist .cl-next__desc {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, var(--color-contrast-surface));
}

.page-start-checklist .cl-next__link:hover .cl-next__kicker,
.page-start-checklist .cl-next__link:hover .cl-next__desc,
.page-start-checklist .cl-next__link:focus-visible .cl-next__kicker,
.page-start-checklist .cl-next__link:focus-visible .cl-next__desc {
  color: var(--color-primary-ink);
}

@media (min-width: 760px) {
  .page-start-checklist .cl-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-start-checklist .cl-next__item:nth-child(odd) {
    border-right: var(--border-thin) solid var(--color-contrast-line);
  }
}

/* ---------- 页缘刻度 ---------- */

.page-start-checklist .cl-gauge {
  display: none;
}

@media (min-width: 1500px) {
  .page-start-checklist .cl-gauge {
    display: block;
    position: fixed;
    top: 50%;
    right: 0;
    width: var(--space-2);
    height: 260px;
    transform: translateY(-50%);
    pointer-events: none;
    opacity: 0.45;
    border-right: var(--border-thick) solid var(--color-primary);
    background-image: repeating-linear-gradient(
      to bottom,
      var(--color-ink-muted) 0 1px,
      transparent 1px 16px
    );
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-start-checklist .cl-item__input::before,
  .page-start-checklist .cl-item__lead,
  .page-start-checklist .cl-item__title,
  .page-start-checklist .cl-next__link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>