.page-faq {
  --faq-hair: 1px solid rgba(127, 178, 196, .42);
  --faq-hair-soft: 1px solid rgba(127, 178, 196, .26);
  --faq-hair-gold: 1px solid rgba(201, 154, 75, .34);
  --faq-gap: clamp(56px, 8vw, 92px);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: var(--faq-gap);
}

.page-faq > section + section {
  margin-top: var(--faq-gap);
}

/* ---------- 封面 ---------- */

.page-faq__cover {
  padding: clamp(26px, 5vw, 48px) 0 clamp(18px, 3vw, 28px);
}

.page-faq__kicker {
  margin: 22px 0 0;
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange-paper);
}

.page-faq__title {
  margin: 12px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq__lede {
  margin: 18px 0 0;
  max-width: 40em;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq__facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: var(--faq-hair);
}

.page-faq__fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: var(--faq-hair-soft);
}

.page-faq__fact-k {
  flex: none;
  min-width: 72px;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq__fact-v {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--cold);
}

/* ---------- 通用引导段 ---------- */

.page-faq__intro {
  margin: 18px 0 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 四步流程 ---------- */

.step-strip {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.step-strip__link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 10px 16px;
  border: var(--faq-hair);
  border-radius: var(--radius-pill);
  text-decoration: none;
  color: var(--ink);
  transition: border-color .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease);
}

.step-strip__link:hover,
.step-strip__link:focus-visible {
  border-color: var(--cold);
  background: rgba(30, 107, 132, .09);
  color: var(--cold);
}

.step-strip__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--cold);
}

.step-strip__name {
  font-family: var(--font-label);
  font-size: 13px;
  letter-spacing: .1em;
  color: inherit;
}

.page-faq__figure {
  margin: 28px 0 0;
}

.page-faq .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.step-notes {
  margin-top: 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: var(--faq-hair);
}

.step-note {
  padding: 22px 0;
  border-bottom: var(--faq-hair-soft);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.step-note__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.step-note__id {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cold);
}

.step-note__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.step-note__rows {
  display: grid;
  gap: 10px;
}

.step-note__row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.step-note__k {
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.step-note__v {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

.step-note__row--flag .step-note__k,
.step-note__row--flag .step-note__v {
  color: var(--orange-paper);
}

/* ---------- 折叠单元 ---------- */

.faq-list {
  margin-top: 26px;
  display: grid;
  gap: 12px;
}

.faq-item {
  border: var(--faq-hair);
  border-radius: var(--radius-md);
  background: rgba(235, 211, 163, .14);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.faq-item:hover {
  border-color: rgba(30, 107, 132, .45);
}

.faq-item[open] {
  border-color: rgba(30, 107, 132, .42);
  background: rgba(235, 211, 163, .24);
}

.faq-item__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
}

.faq-item__head::-webkit-details-marker {
  display: none;
}

.faq-item__head:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--cold);
  border-radius: var(--radius-md);
}

.faq-item__num {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cold);
}

.faq-item__title {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.faq-item__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  color: var(--ochre);
}

.faq-item__mark::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  margin-top: -.75px;
  background: currentColor;
}

.faq-item__mark::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1.5px;
  margin-left: -.75px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.faq-item__body {
  padding: 16px 18px 20px;
  border-top: var(--faq-hair-soft);
}

.page-faq .prose {
  max-width: 42em;
}

.page-faq .prose p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .prose p:last-child {
  margin-bottom: 0;
}

.faq-item__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.faq-figure {
  margin: 0;
}

.mis-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.mis-list__item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--orange-paper);
}

.mis-list__item::before {
  content: "×";
  font-family: var(--font-mono);
  line-height: 1.5;
  color: var(--orange);
}

/* ---------- 字段示意 ---------- */

.field-map {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.field-map__row {
  display: grid;
  grid-template-columns: max-content minmax(16px, 1fr) max-content;
  align-items: baseline;
  gap: 8px;
}

.field-map__k {
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.field-map__dots {
  border-bottom: 1px dashed rgba(127, 178, 196, .7);
  transform: translateY(-4px);
}

.field-map__v {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--cold);
  text-align: right;
}

/* ---------- 选型条款 ---------- */

.selection-panel {
  margin-top: 24px;
  padding: clamp(20px, 4vw, 34px);
  border: var(--faq-hair-gold);
  border-radius: var(--radius-lg);
  background: var(--paper-2);
}

.selection-line {
  display: block;
  margin: 0;
  padding-left: 16px;
  border-left: 3px solid var(--ochre);
  font-family: var(--font-display);
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink);
}

.selection-rows {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--faq-hair-soft);
}

.selection-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: var(--faq-hair-soft);
}

.selection-row__k {
  font-family: var(--font-label);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ochre);
}

.selection-row__v {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 提异议 ---------- */

.dispute-band {
  margin-top: 24px;
  padding: clamp(22px, 4vw, 38px);
  border-radius: var(--radius-lg);
  background: var(--rail-bg);
  color: var(--paper);
}

.dispute-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.dispute-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
}

.dispute-step__num {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cold-light);
}

.dispute-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

.dispute-note {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(127, 178, 196, .34);
  font-size: 13px;
  line-height: 1.8;
  color: var(--sand-light);
}

.dispute-note .mono {
  color: var(--sand);
}

.dispute-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.dispute-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 20px;
  border: 1px solid rgba(127, 178, 196, .55);
  border-radius: var(--radius-pill);
  font-family: var(--font-label);
  font-size: 12.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--paper);
  transition: background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.dispute-link:hover,
.dispute-link:focus-visible {
  background: rgba(127, 178, 196, .18);
  border-color: var(--cold-light);
}

.dispute-link--solid {
  background: var(--sand);
  border-color: var(--sand);
  color: var(--ink);
}

.dispute-link--solid:hover,
.dispute-link--solid:focus-visible {
  background: var(--sand-light);
  border-color: var(--sand-light);
  color: var(--ink);
}

/* ---------- 常见错误 ---------- */

.error-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.error-col {
  padding: 20px;
  border-radius: var(--radius-md);
  border: var(--faq-hair-soft);
}

.error-col--no {
  background: rgba(107, 96, 85, .09);
}

.error-col--yes {
  background: rgba(30, 107, 132, .08);
  border-color: rgba(30, 107, 132, .34);
}

.error-col__cap {
  margin: 0 0 14px;
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cold);
}

.error-col--no .error-col__cap {
  color: var(--muted);
}

.error-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.error-list__item {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.65;
}

.error-col--no .error-list__item {
  color: var(--muted);
}

.error-col--yes .error-list__item {
  color: var(--ink);
}

.error-list__item::before {
  font-family: var(--font-mono);
  line-height: 1.5;
}

.error-col--no .error-list__item::before {
  content: "—";
  color: var(--muted);
}

.error-col--yes .error-list__item::before {
  content: "✓";
  color: var(--cold);
}

.page-faq__tail {
  display: block;
  margin: 26px 0 0;
  max-width: 44em;
}

.page-faq__tail a {
  color: var(--cold);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq__fact {
    padding: 14px 20px;
    border-bottom: 0;
    border-left: var(--faq-hair-soft);
  }

  .page-faq__fact:nth-child(odd) {
    border-left: 0;
    padding-left: 0;
  }

  .page-faq__fact:nth-child(n+3) {
    border-top: var(--faq-hair-soft);
  }

  .step-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .selection-row {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

@media (min-width: 880px) {
  .page-faq__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq__fact:nth-child(n+3) {
    border-top: 0;
  }

  .page-faq__fact:nth-child(odd) {
    border-left: var(--faq-hair-soft);
    padding-left: 20px;
  }

  .page-faq__fact:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .step-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
  }

  .step-note {
    padding: 26px 0;
  }

  .error-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .faq-item__head {
    padding: 18px 24px;
  }

  .faq-item__body {
    padding: 18px 24px 24px;
  }

  .faq-item__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    gap: 34px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: .01ms !important;
  }

  .faq-item__mark::after {
    transition: none;
  }
}