/* ============================================================
   page: start-checklist ｜ 上手准备清单
   ============================================================ */

.page-start-checklist {
  --check-rule: var(--border-thin) solid var(--color-line);
  padding-bottom: var(--section-y);
}

/* ---------- 首屏导语 ---------- */

.page-start-checklist .check-intro {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-start-checklist .check-intro__title {
  margin: var(--space-2) 0 0;
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 20ch;
  text-wrap: balance;
}

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

.page-start-checklist .check-intro__tally {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  border-top: var(--check-rule);
  padding-top: var(--space-3);
}

.page-start-checklist .check-intro__tally-item {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-start-checklist .check-intro__tally-item .mono {
  color: var(--color-primary);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

/* ---------- 图片 ---------- */

.page-start-checklist .check-figure {
  margin: var(--space-6) auto;
}

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

.page-start-checklist .check-figure__cap {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* ---------- 执行顺序 ---------- */

.page-start-checklist .flow-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: var(--check-rule);
}

.page-start-checklist .flow-list__item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: var(--space-1) var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--check-rule);
}

.page-start-checklist .flow-list__no {
  grid-column: 1;
  grid-row: 1 / 3;
  font-size: var(--text-lg);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
  line-height: var(--leading-heading);
}

.page-start-checklist .flow-list__name {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-start-checklist .flow-list__text {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-start-checklist .quote-note {
  margin-top: var(--space-4);
}

/* ---------- 检查项列表 ---------- */

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

.page-start-checklist .check-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-4) 0 var(--space-4) var(--space-3);
  border-top: var(--check-rule);
  transition: background-color 160ms ease-out;
}

.page-start-checklist .check-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-4);
  bottom: var(--space-4);
  width: 2px;
  background-color: var(--color-line);
  transition: background-color 160ms ease-out;
}

.page-start-checklist .check-row:last-child {
  border-bottom: var(--check-rule);
}

.page-start-checklist .check-row:hover {
  background-color: var(--color-surface-alt);
}

.page-start-checklist .check-row:hover::before {
  background-color: var(--color-primary);
}

.page-start-checklist .check-row:has(.check-box__input:checked) {
  background-color: var(--color-primary-soft);
}

.page-start-checklist .check-row:has(.check-box__input:checked)::before {
  background-color: var(--color-primary);
}

/* 检查项头部：编号 + 名称 + 勾选 */

.page-start-checklist .check-row__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
}

.page-start-checklist .check-row__no {
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

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

.page-start-checklist .check-box {
  grid-column: 1 / -1;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-1);
  cursor: pointer;
  user-select: none;
}

.page-start-checklist .check-box__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
  pointer-events: none;
}

.page-start-checklist .check-box__mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  transition: background-color 160ms ease-out, border-color 160ms ease-out;
}

.page-start-checklist .check-box__input:checked + .check-box__mark {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.page-start-checklist .check-box__input:checked + .check-box__mark::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--color-primary-ink);
  border-bottom: 2px solid var(--color-primary-ink);
  transform: rotate(45deg);
}

.page-start-checklist .check-box__input:focus-visible + .check-box__mark {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-start-checklist .check-box__label {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

/* 通过与处置两栏 */

.page-start-checklist .check-row__panel {
  display: grid;
  gap: var(--space-1);
}

.page-start-checklist .check-row__tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-start-checklist .check-row__tag--fix {
  color: var(--color-ink-muted);
}

.page-start-checklist .check-row__panel p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 处置条带 ---------- */

.page-start-checklist .fix-strip {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: var(--check-rule);
}

.page-start-checklist .fix-strip__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--check-rule);
}

.page-start-checklist .fix-strip__key {
  justify-self: start;
  padding: 2px var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
  border-radius: var(--radius-sm);
}

.page-start-checklist .fix-strip__title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-start-checklist .fix-strip__text {
  margin: 0;
  max-width: 68ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-start-checklist .fix-strip__link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-start-checklist .fix-strip__link:hover {
  color: var(--color-focus);
}

.page-start-checklist .fix-strip__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------- 延伸入口 ---------- */

.page-start-checklist .exit-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: var(--check-rule);
}

.page-start-checklist .exit-list__item {
  border-bottom: var(--check-rule);
}

.page-start-checklist .exit-list__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding: var(--space-4) var(--space-2);
  text-decoration: none;
  color: inherit;
  transition: background-color 160ms ease-out;
}

.page-start-checklist .exit-list__link:hover {
  background-color: var(--color-surface-alt);
}

.page-start-checklist .exit-list__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: -2px;
}

.page-start-checklist .exit-list__no {
  grid-column: 1;
  grid-row: 1 / 3;
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
}

.page-start-checklist .exit-list__name {
  grid-column: 2;
  grid-row: 1;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-start-checklist .exit-list__link:hover .exit-list__name {
  color: var(--color-primary);
}

.page-start-checklist .exit-list__desc {
  grid-column: 2;
  grid-row: 2;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 桌面端：左右分栏对照 ---------- */

@media (min-width: 900px) {

  .page-start-checklist .check-intro {
    padding-top: var(--space-8);
    padding-bottom: var(--space-4);
  }

  .page-start-checklist .check-intro__title {
    font-size: var(--text-4xl);
    max-width: 24ch;
  }

  .page-start-checklist .check-intro__lede {
    font-size: var(--text-lg);
  }

  .page-start-checklist .flow-list__item {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: var(--space-1) var(--space-4);
    padding: var(--space-4) 0;
  }

  .page-start-checklist .flow-list__no {
    font-size: var(--text-xl);
  }

  .page-start-checklist .check-row {
    grid-template-columns: minmax(180px, 3fr) minmax(0, 5fr) minmax(0, 4fr);
    gap: 0 var(--space-4);
    align-items: start;
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
    padding-left: var(--space-4);
  }

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

  .page-start-checklist .check-row__panel--pass {
    grid-column: 2;
    grid-row: 1;
    padding-left: var(--space-4);
    border-left: var(--check-rule);
  }

  .page-start-checklist .check-row__panel--fix {
    grid-column: 3;
    grid-row: 1;
    padding-left: var(--space-4);
    border-left: var(--check-rule);
  }

  .page-start-checklist .check-row__panel p {
    max-width: 40ch;
  }

  .page-start-checklist .fix-strip__row {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
    padding: var(--space-4) 0;
  }

  .page-start-checklist .fix-strip__key {
    justify-self: stretch;
    text-align: center;
  }
}

@media (min-width: 1180px) {

  .page-start-checklist .check-row {
    grid-template-columns: minmax(210px, 3fr) minmax(0, 5fr) minmax(0, 4fr);
  }

  .page-start-checklist .check-row__no {
    font-size: var(--text-2xl);
  }
}

/* ---------- 降低动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-start-checklist .check-row,
  .page-start-checklist .check-row::before,
  .page-start-checklist .check-box__mark,
  .page-start-checklist .exit-list__link {
    transition: none;
  }
}
<<<END>>>