.page-faq {
  --faq-ink-soft: #2C3A36;
  --faq-line: rgba(17, 26, 24, .18);
  --faq-line-dark: rgba(245, 250, 255, .22);
  --faq-gap: 1.25rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background: var(--night);
  border-bottom: var(--rule) solid var(--yellow);
  padding: 2rem 0 2.75rem;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    180deg,
    rgba(245, 250, 255, .045) 0 1px,
    transparent 1px 5px
  );
  pointer-events: none;
}

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

.page-faq .breadcrumb {
  margin-bottom: 1.5rem;
}

.page-faq .faq-hero__title {
  font-size: clamp(1.9rem, 6.4vw, 3.5rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--white);
  margin: 0 0 1rem;
  max-width: 20ch;
  text-shadow: 0 1px 0 rgba(0, 0, 0, .35);
}

.page-faq .faq-hero__lead {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(245, 250, 255, .82);
  max-width: 62ch;
  margin: 0 0 1.75rem;
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.75rem;
  list-style: none;
  margin: 0;
  padding: 1rem 0 0;
  border-top: 1px dashed var(--faq-line-dark);
  font-size: .875rem;
  color: var(--mist);
  letter-spacing: .04em;
}

.page-faq .faq-hero__stats .num {
  color: var(--yellow);
  font-size: 1.375rem;
  font-weight: 700;
  margin-right: .25rem;
}

/* ---------- 结构图与分区导航 ---------- */
.page-faq .faq-map {
  background: var(--green-900);
  padding: 2.5rem 0 3rem;
}

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

.page-faq .faq-map__title {
  font-size: clamp(1.25rem, 3.6vw, 1.75rem);
  color: var(--white);
  margin: 0 0 1.25rem;
  padding-bottom: .5rem;
  border-bottom: var(--rule) solid var(--yellow);
  display: inline-block;
}

.page-faq .faq-nav-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-nav-card {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1.1rem 1.15rem 1.25rem;
  background: var(--green-700);
  border: 3px solid var(--white);
  box-shadow: 6px 6px 0 var(--night);
  color: var(--white);
  text-decoration: none;
  transition: transform var(--dur-mid) var(--ease),
              box-shadow var(--dur-mid) var(--ease),
              border-color var(--dur-mid) var(--ease);
}

.page-faq .faq-nav-card:hover,
.page-faq .faq-nav-card:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 var(--night);
  border-color: var(--yellow);
  outline: none;
}

.page-faq .faq-nav-card__no {
  font-size: .8125rem;
  letter-spacing: .18em;
  color: var(--yellow);
}

.page-faq .faq-nav-card__title {
  font-size: 1.1875rem;
  font-weight: 700;
  line-height: 1.35;
}

.page-faq .faq-nav-card__count {
  font-size: .8125rem;
  color: var(--yellow);
  letter-spacing: .06em;
}

.page-faq .faq-nav-card__keys {
  margin-top: .35rem;
  padding-top: .65rem;
  border-top: 1px dashed var(--faq-line-dark);
  font-size: .8125rem;
  line-height: 1.7;
  color: rgba(245, 250, 255, .66);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-answers {
  background: var(--paper);
  color: var(--ink);
  padding: 2.5rem 0 3.5rem;
}

.page-faq .faq-search {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  margin-bottom: 2.25rem;
  padding: 1rem 1.1rem;
  background: var(--white);
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 rgba(17, 26, 24, .16);
}

.page-faq .faq-search__label {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--night);
  text-transform: uppercase;
}

.page-faq .faq-search__input {
  width: 100%;
  padding: .65rem .75rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--faq-line);
  border-left: 4px solid var(--yellow);
  border-radius: 0;
}

.page-faq .faq-search__input:focus {
  outline: 2px solid var(--night-600);
  outline-offset: 1px;
}

.page-faq .faq-block {
  padding-top: 2rem;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.page-faq .faq-block + .faq-block {
  margin-top: 2.5rem;
  border-top: 3px solid var(--ink);
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no title"
    "no note";
  column-gap: .9rem;
  align-items: baseline;
  margin-bottom: 1.25rem;
}

.page-faq .faq-block__head .chapter-no {
  grid-area: no;
  color: var(--night-600);
  padding-top: .3rem;
}

.page-faq .faq-block__title {
  grid-area: title;
  font-size: clamp(1.4rem, 4.4vw, 2.125rem);
  line-height: 1.25;
  color: var(--ink);
  margin: 0;
  border-bottom: 4px solid var(--yellow);
  display: inline-block;
  width: fit-content;
  padding-bottom: .25rem;
}

.page-faq .faq-block__note {
  grid-area: note;
  margin: .55rem 0 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .faq-item details > summary {
  list-style: none;
  cursor: pointer;
}

.page-faq .faq-item details > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 2.6rem 1fr 1.2rem;
  align-items: start;
  gap: .5rem;
  padding: 1.05rem 0;
  transition: background-color var(--dur-fast) linear;
}

.page-faq .faq-item__q:hover {
  background: rgba(242, 208, 36, .16);
}

.page-faq .faq-item__no {
  font-size: .875rem;
  letter-spacing: .08em;
  color: var(--night-600);
  padding-top: .28rem;
}

.page-faq .faq-item__text {
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-item__mark {
  width: .62rem;
  height: .62rem;
  margin-top: .5rem;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(45deg);
  transition: transform var(--dur-mid) var(--ease);
}

.page-faq .faq-item details[open] .faq-item__mark {
  transform: rotate(-135deg);
}

.page-faq .faq-item__a {
  padding: 0 0 1.2rem 3.1rem;
  font-size: .975rem;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-client__figure {
  margin: 0 0 1.5rem;
  max-width: 26rem;
}

.page-faq .faq-link {
  color: var(--night);
  text-decoration: none;
  border-bottom: 2px solid var(--yellow);
  font-weight: 600;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  background: rgba(242, 208, 36, .35);
  outline: none;
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-help {
  background: var(--night);
  border-top: var(--rule) solid var(--yellow);
  padding: 2.5rem 0 3rem;
  color: var(--white);
}

.page-faq .faq-help__title {
  font-size: clamp(1.4rem, 4.4vw, 2.125rem);
  line-height: 1.25;
  color: var(--white);
  margin: 0 0 .75rem;
}

.page-faq .faq-help__lead {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(245, 250, 255, .8);
  max-width: 58ch;
  margin: 0 0 1.75rem;
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-help__item {
  padding: 1.1rem 1.15rem;
  background: var(--green-900);
  border-left: 6px solid var(--yellow);
}

.page-faq .faq-help__label {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--yellow);
  text-transform: uppercase;
}

.page-faq .faq-help__value {
  margin: 0 0 .55rem;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-help__desc {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: rgba(245, 250, 255, .68);
}

.page-faq .faq-help .faq-link {
  color: var(--white);
  border-bottom-color: var(--yellow);
}

.page-faq .faq-help__note {
  margin: 1.75rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--faq-line-dark);
  font-size: .8125rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: 3rem 0 3.5rem;
  }

  .page-faq .faq-map {
    padding: 3.25rem 0 3.75rem;
  }

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

  .page-faq .faq-answers {
    padding: 3.25rem 0 4.5rem;
  }

  .page-faq .faq-search {
    flex-direction: row;
    align-items: center;
    gap: 1rem;
  }

  .page-faq .faq-search__label {
    flex: 0 0 auto;
  }

  .page-faq .faq-item__q {
    grid-template-columns: 3.4rem 1fr 1.4rem;
    gap: 1rem;
    padding: 1.2rem 0;
  }

  .page-faq .faq-item__a {
    padding-left: 4.4rem;
  }

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

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 3.75rem 0 4.25rem;
  }

  .page-faq .faq-hero__title {
    font-size: clamp(2.5rem, 4.2vw, 3.75rem);
  }

  .page-faq .faq-hero__lead {
    font-size: 1.0625rem;
  }

  .page-faq .faq-nav-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-faq .faq-block + .faq-block {
    margin-top: 3.5rem;
  }

  .page-faq .faq-item__q {
    grid-template-columns: 4rem 1fr 1.6rem;
    padding: 1.35rem 0;
  }

  .page-faq .faq-item__text {
    font-size: 1.125rem;
  }

  .page-faq .faq-item__a {
    padding-left: 5rem;
    padding-bottom: 1.5rem;
    max-width: 78ch;
  }

  .page-faq .faq-client__figure {
    float: right;
    margin: 0 0 1.5rem 2.5rem;
    shape-outside: margin-box;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-faq .faq-help {
    padding: 3.25rem 0 3.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-nav-card,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__q {
    transition: none;
  }

  .page-faq .faq-nav-card:hover,
  .page-faq .faq-nav-card:focus-visible {
    transform: none;
    box-shadow: 6px 6px 0 var(--night);
  }
}
<<<END>>>