.page-faq {
  --faq-measure: 64ch;
  --faq-rule: rgba(124, 154, 143, 0.22);
  background: var(--c-ink);
  color: var(--c-paper);
  padding-bottom: clamp(24px, 5vw, 56px);
}

.page-faq [hidden] {
  display: none !important;
}

.page-faq .breadcrumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-faq .display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.3rem, 8vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  color: var(--c-paper);
}

/* 首屏声明 */
.faq-head {
  padding-block: clamp(16px, 3vw, 28px) clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--faq-rule);
}

.faq-head__lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.75;
  color: var(--c-rock);
}

.faq-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: clamp(20px, 3vw, 30px);
}

.faq-quick__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--c-mist);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.faq-quick__link:hover,
.faq-quick__link:focus-visible {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* 分组筛选条 */
.faq-filterbar-outer {
  position: sticky;
  top: 62px;
  z-index: 30;
  background: var(--c-ink);
  border-block: 1px solid var(--faq-rule);
}

.faq-filterbar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-block: 12px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.faq-filterbar::-webkit-scrollbar {
  display: none;
}

.page-faq .filter-btn {
  flex: 0 0 auto;
  white-space: nowrap;
}

.faq-count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  margin-left: 7px;
  opacity: 0.72;
}

/* 分组 */
.faq-group {
  padding-block: clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--faq-rule);
}

.faq-group:last-of-type {
  border-bottom: 0;
}

.faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.faq-group__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
}

.faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.25rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.faq-group__note {
  grid-column: 2;
  margin: 0;
  max-width: 50ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-rock);
}

/* 问答条目 */
.faq-list {
  display: grid;
}

.qa {
  border-top: 1px solid var(--faq-rule);
}

.qa:last-child {
  border-bottom: 1px solid var(--faq-rule);
}

.qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 16px 0 16px 13px;
  border-left: 2px solid transparent;
  cursor: pointer;
  list-style: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.qa__q::-webkit-details-marker {
  display: none;
}

.qa__q:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.qa__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-rock);
  padding-top: 6px;
}

.qa__label {
  font-size: clamp(1.05rem, 2.2vw, 1.4rem);
  font-weight: 500;
  line-height: 1.42;
  color: var(--c-paper);
}

.qa__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  flex: none;
}

.qa__mark::before,
.qa__mark::after {
  content: "";
  position: absolute;
  background: var(--c-rock);
  transition: transform 0.18s ease, opacity 0.18s ease, background 0.18s ease;
}

.qa__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.qa__mark::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.qa[open] .qa__q {
  border-left-color: var(--c-cyan);
}

.qa[open] .qa__label {
  color: var(--c-cyan);
}

.qa[open] .qa__mark::before {
  background: var(--c-cyan);
}

.qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.qa__a {
  padding: 0 0 20px 13px;
}

.qa__a p {
  margin: 0 0 10px;
  max-width: var(--faq-measure);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-paper);
  opacity: 0.86;
}

.qa__a p:last-child {
  margin-bottom: 0;
}

.qa__a ol {
  margin: 4px 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
  max-width: var(--faq-measure);
}

.qa__a ol li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 32px;
  margin-bottom: 8px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-paper);
  opacity: 0.86;
}

.qa__a ol li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
  opacity: 1;
}

/* 配图 */
.faq-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.faq-figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.faq-figure .media__caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--c-rock);
}

/* 左右分栏的查看与对照 */
.faq-split {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.faq-split__main {
  min-width: 0;
}

.faq-split__side {
  min-width: 0;
}

.faq-split__side .faq-figure {
  margin-bottom: 0;
}

/* 米白纸张块 */
.faq-group--paper {
  background: var(--c-paper);
  color: var(--c-print);
  padding: clamp(22px, 4vw, 44px);
  margin-block: clamp(24px, 4vw, 48px);
  border-bottom: 0;
  box-shadow: 10px 10px 0 var(--c-print);
}

.faq-group--paper .faq-group__idx {
  color: var(--c-clay);
}

.faq-group--paper .faq-group__note {
  color: rgba(5, 10, 8, 0.66);
}

.faq-group--paper .qa {
  border-top-color: rgba(5, 10, 8, 0.16);
}

.faq-group--paper .qa:last-child {
  border-bottom-color: rgba(5, 10, 8, 0.16);
}

.faq-group--paper .qa__label,
.faq-group--paper .qa[open] .qa__label {
  color: var(--c-print);
}

.faq-group--paper .qa__num {
  color: var(--c-clay);
}

.faq-group--paper .qa__mark::before,
.faq-group--paper .qa__mark::after {
  background: var(--c-clay);
}

.faq-group--paper .qa[open] .qa__q {
  border-left-color: var(--c-clay);
}

.faq-group--paper .qa__a p,
.faq-group--paper .qa__a ol li {
  color: rgba(5, 10, 8, 0.78);
  opacity: 1;
}

.faq-group--paper .qa__a ol li::before {
  color: var(--c-clay);
}

.faq-group--paper .qa__q:focus-visible {
  outline-color: var(--c-clay);
}

/* 收尾联系面板 */
.faq-help {
  margin-block: clamp(36px, 6vw, 76px) clamp(12px, 3vw, 28px);
  padding: clamp(24px, 5vw, 48px);
  background: var(--c-panel);
  border: 1px solid var(--line-strong);
  box-shadow: 10px 10px 0 var(--c-print);
}

.faq-help h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.4vw, 2.75rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.faq-help p {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-rock);
}

.faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

@media (max-width: 860px) {
  .faq-filterbar-outer {
    top: 56px;
  }
}

@media (min-width: 720px) {
  .qa__q {
    gap: 16px;
    padding: 20px 0 20px 16px;
  }

  .qa__a {
    padding: 0 0 24px 16px;
  }

  .faq-group__head {
    gap: 10px 20px;
  }
}

@media (min-width: 960px) {
  .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: start;
  }

  .faq-split__side .faq-figure {
    position: sticky;
    top: 130px;
  }

  .qa__label {
    font-size: 1.375rem;
  }

  .faq-help {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 12px 32px;
  }

  .faq-help h2 {
    grid-column: 1;
  }

  .faq-help p {
    grid-column: 1;
  }

  .faq-help__actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin-top: 0;
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__q,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-quick__link {
    transition: none;
  }
}
<<<END>>>