.page-faq {
  --faq-index-w: 236px;
  --faq-rule: rgba(217, 220, 207, 0.18);
  --faq-rule-strong: rgba(217, 220, 207, 0.42);
}

/* 面包屑与首屏 */
.page-faq .faq-crumbs {
  padding-top: 1.6rem;
  padding-bottom: 0.4rem;
}

.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  padding-top: clamp(1.25rem, 3.5vw, 2.5rem);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-hero__lead .display {
  margin: 0.5rem 0 1rem;
}

.page-faq .faq-hero__lead .lede {
  max-width: 60ch;
}

.page-faq .faq-hero__panel {
  border: 1px solid var(--line);
  background: var(--card-bg);
  padding: 1.15rem 1.25rem 1.3rem;
}

.page-faq .faq-hero__panel-key {
  margin: 0 0 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-faq .faq-hero__panel-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-hero__panel-list a {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.68rem 0.2rem;
  border-top: 1px solid var(--faq-rule);
  color: var(--fg);
  text-decoration: none;
  font-size: var(--fs-small);
  font-weight: 600;
  transition: color 0.18s ease, padding-left 0.18s ease;
}

.page-faq .faq-hero__panel-list a:hover {
  color: var(--lime);
  padding-left: 0.55rem;
}

.page-faq .faq-hero__panel-list .mono {
  color: var(--corner);
  font-size: 0.8125rem;
}

/* 主体两栏：左侧索引 + 右侧问答 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index__key {
  margin: 0 0 0.7rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--faq-rule-strong);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.68rem;
  padding: 0.68rem 0.5rem 0.68rem 0.85rem;
  border-bottom: 1px solid var(--faq-rule);
  color: var(--muted);
  text-decoration: none;
  font-size: var(--fs-small);
  font-weight: 600;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 3px;
  background: transparent;
  transition: background-color 0.18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link[data-active] {
  color: var(--fg);
  background-color: rgba(200, 240, 74, 0.06);
}

.page-faq .faq-index__link:hover::before,
.page-faq .faq-index__link[data-active]::before {
  background-color: var(--lime);
}

.page-faq .faq-index__num {
  color: var(--corner);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.page-faq .faq-index__noteee,
.page-faq .faq-index__note {
  margin: 1.25rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-index__note .link {
  color: var(--lime);
}

/* 分组标题 */
.page-faq .faq-group {
  margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
  scroll-margin-top: 5.5rem;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 0.9rem;
  row-gap: 0.35rem;
  align-items: baseline;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--faq-rule-strong);
  margin-bottom: 1.75rem;
}

.page-faq .faq-group__head .chapter-num {
  grid-row: 1 / span 2;
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  line-height: 1;
}

.page-faq .faq-group__head .chapter-title {
  grid-column: 2;
  margin: 0;
}

.page-faq .faq-group__lede {
  grid-column: 2;
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.7;
}

.page-faq .faq-figure {
  margin: 0 0 2rem;
}

/* 问答条目 */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.15rem 0.25rem 1.15rem 0;
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  font-size: clamp(1rem, 1.7vw, 1.125rem);
  line-height: 1.55;
  color: var(--fg);
  transition: color 0.18s ease;
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:hover {
  color: var(--lime);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 0.25rem;
  border: 1px solid var(--faq-rule-strong);
  color: var(--muted);
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-faq .faq-q__mark::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-q__mark::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.page-faq .faq-item[open] .faq-q__mark {
  background-color: var(--lime);
  border-color: var(--lime);
  color: var(--char);
}

.page-faq .faq-item[open] .faq-q__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  max-width: 74ch;
  padding: 0 0 1.6rem 0;
  animation: faq-reveal 0.22s ease-out;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-a__lead {
  margin: 0 0 1rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--corner);
  color: var(--fg);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 2.4rem;
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.75;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.18rem;
  width: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--olive);
}

.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  top: 1.35rem;
  bottom: -0.55rem;
  width: 1px;
  background: var(--faq-rule);
}

.page-faq .faq-steps li:last-child::after {
  display: none;
}

/* 底部联系区 */
.page-faq .faq-contact {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.page-faq .faq-contact__lead .h2 {
  margin: 0.5rem 0 1rem;
}

.page-faq .faq-contact__lead p {
  max-width: 58ch;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-contact__lead p + p {
  margin-top: 0.9rem;
}

.page-faq .faq-contact__panel {
  border: 1px solid rgba(20, 17, 15, 0.16);
  padding: 1.2rem 1.25rem 1.4rem;
  background: rgba(20, 17, 15, 0.03);
}

.page-faq .faq-contact__list {
  margin: 0 0 1.2rem;
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.2rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(20, 17, 15, 0.14);
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-contact__row dt {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: rgba(20, 17, 15, 0.55);
  font-weight: 600;
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--char);
  word-break: break-word;
}

.page-faq .faq-contact__panel .copy-btn {
  font-family: var(--font-mono);
}

/* 响应式 */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 3.5rem);
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 6.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 0.9rem;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: clamp(3.5rem, 7vh, 5rem);
  }

  .page-faq .faq-group__head {
    column-gap: 1.4rem;
    padding-bottom: 1.15rem;
    margin-bottom: 2rem;
  }
}

@media (min-width: 1240px) {
  .page-faq {
    --faq-index-w: 260px;
  }
}
<<<END>>>