.page-faq {
  --faq-shadow: 0 10px 22px rgba(31, 42, 46, .08);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: 56px;
}

.page-faq .page-shell {
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-faq .breadcrumb {
  padding-top: 18px;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 6px;
  color: var(--teal-gray);
}

.page-faq .breadcrumb__link {
  color: var(--lake);
  text-decoration: none;
}

.page-faq .breadcrumb__link:hover {
  color: var(--amber-ink);
  text-decoration: underline;
}

.page-faq .mono-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  line-height: 1.5;
  padding: 3px 8px;
  border: 1px solid var(--grid);
  border-radius: 2px;
  color: var(--ink-soft);
  background: var(--card);
  margin: 0;
}

.page-faq .mono-tag--lake {
  color: var(--lake);
  border-color: var(--mist);
  background: transparent;
}

.page-faq .chapter {
  margin-bottom: 14px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 26px;
  padding-block: 24px 34px;
  border-bottom: 1px solid var(--ink);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 71px, rgba(217, 210, 195, .55) 71px 72px),
    repeating-linear-gradient(90deg, transparent 0 71px, rgba(217, 210, 195, .55) 71px 72px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  pointer-events: none;
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7.2vw, 52px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq .faq-hero__chips a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--lake);
  background: var(--card);
  border: 1px solid var(--mist);
  border-radius: 3px;
  padding: 7px 11px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-hero__chips a:hover,
.page-faq .faq-hero__chips a:focus-visible {
  background: var(--lake);
  border-color: var(--lake);
  color: var(--paper);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--grid);
  background: var(--card);
}

/* ---------- 快速定位 ---------- */
.page-faq .faq-index {
  margin-top: 32px;
  padding-block: 28px 32px;
  background: linear-gradient(180deg, var(--paper-deep) 0%, var(--paper) 100%);
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-index__lead {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 15px;
  color: var(--ink-soft);
}

.page-faq .faq-index__grid {
  display: grid;
  gap: 12px;
}

.page-faq .idx-card {
  position: relative;
  display: block;
  text-decoration: none;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--grid);
  padding: 16px 16px 18px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .idx-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.page-faq .idx-card:hover,
.page-faq .idx-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--lake);
  box-shadow: var(--faq-shadow);
}

.page-faq .idx-card:hover::before,
.page-faq .idx-card:focus-visible::before {
  transform: scaleX(1);
}

.page-faq .idx-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--lake);
  opacity: .85;
}

.page-faq .idx-card__label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-faq .idx-card__desc {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-faq .idx-card__count {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--teal-gray);
}

.page-faq .faq-index__figure {
  margin: 20px 0 0;
  max-width: 560px;
}

.page-faq .faq-index__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--grid);
  background: var(--card);
}

.page-faq .img-caption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--teal-gray);
}

/* ---------- 问答组 ---------- */
.page-faq .qa {
  padding-top: 36px;
}

.page-faq .qa-group {
  display: grid;
  gap: 14px;
  padding-block: 24px;
  border-top: 1px solid var(--ink);
}

.page-faq .qa-group__rail h3 {
  margin: 10px 0 6px;
  font-family: var(--font-head);
  font-size: 25px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--deep-teal);
}

.page-faq .qa-group__rail p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-faq .qa-group__list {
  display: grid;
  gap: 8px;
}

.page-faq .qa-item {
  background: var(--card);
  border: 1px solid var(--grid);
  box-shadow: inset 3px 0 0 transparent;
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-item:hover {
  border-color: var(--mist);
}

.page-faq .qa-item[open] {
  box-shadow: inset 4px 0 0 var(--orange);
  border-color: var(--mist);
}

.page-faq .qa-item__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-item__head:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}

.page-faq .qa-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--lake);
  border: 1px solid var(--mist);
  border-radius: 2px;
  padding: 1px 6px;
}

.page-faq .qa-item__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .qa-item[open] .qa-item__q {
  color: var(--deep-teal);
}

.page-faq .qa-item__mark {
  width: 9px;
  height: 9px;
  margin-right: 4px;
  border-right: 2px solid var(--lake);
  border-bottom: 2px solid var(--lake);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-item[open] .qa-item__mark {
  transform: rotate(-135deg);
  border-color: var(--amber);
}

.page-faq .qa-item__body {
  padding: 0 14px 16px 14px;
}

.page-faq .qa-item__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .qa-item__next {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--amber-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-item__next:hover,
.page-faq .qa-item__next:focus-visible {
  color: var(--amber-deep);
  border-color: var(--amber-deep);
}

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

.page-faq .qa-item[open] .qa-item__body {
  animation: faq-panel-in 240ms var(--ease) both;
}

/* ---------- 兜底通道 ---------- */
.page-faq .faq-help {
  padding-top: 38px;
}

.page-faq .faq-help__lead {
  margin: 0 0 20px;
  max-width: 56ch;
  font-size: 15px;
  color: var(--ink-soft);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 12px;
}

.page-faq .faq-help__card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--grid);
  padding: 18px;
}

.page-faq .faq-help__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  color: var(--deep-teal);
}

.page-faq .faq-help__card p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-help__value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .01em;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-help__card--cta {
  background: var(--deep-teal);
  border-color: var(--deep-teal);
}

.page-faq .faq-help__card--cta h3 {
  color: var(--paper);
}

.page-faq .faq-help__card--cta p {
  color: rgba(247, 243, 234, .84);
}

.page-faq .faq-help__card--cta .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .qa-item__q {
    font-size: 17px;
  }

  .page-faq .qa-item__head {
    padding: 14px 18px;
  }

  .page-faq .qa-item__body {
    padding: 0 18px 18px 18px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 40px;
    padding-block: 40px 46px;
  }

  .page-faq .faq-hero__figure {
    transform: rotate(-1deg);
  }

  .page-faq .faq-index {
    margin-top: 40px;
    padding-block: 34px 38px;
  }

  .page-faq .faq-index__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .idx-card:nth-child(even) {
    margin-top: 18px;
  }

  .page-faq .faq-index__figure {
    max-width: 420px;
    margin: 24px 0 0 auto;
  }

  .page-faq .qa {
    padding-top: 46px;
  }

  .page-faq .qa-group {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 32px;
    padding-block: 28px;
  }

  .page-faq .qa-group__rail {
    position: sticky;
    top: 20px;
    align-self: start;
  }

  .page-faq .qa-group__rail p {
    font-size: 14px;
  }

  .page-faq .faq-help {
    padding-top: 48px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item[open] .qa-item__body {
    animation: none;
  }

  .page-faq .idx-card,
  .page-faq .idx-card::before,
  .page-faq .qa-item__mark,
  .page-faq .qa-item__next,
  .page-faq .faq-hero__chips a {
    transition: none;
  }

  .page-faq .faq-hero__figure {
    transform: none;
  }
}