.page-faq {
  --faq-index-w: 244px;
  --faq-spec-w: 172px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(64px, 9vw, 128px);
}

/* ---------- 面包屑 ---------- */
.page-faq .page-faq__crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: clamp(20px, 3vw, 36px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--turf-deep);
}
.page-faq .page-faq__crumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease-out;
}
.page-faq .page-faq__crumb a:hover {
  border-bottom-color: var(--whistle);
}
.page-faq .page-faq__crumb .breadcrumb__sep {
  color: var(--rule);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(36px, 5.5vw, 84px) clamp(36px, 5vw, 76px);
  border-bottom: 1px solid var(--rule);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(201, 192, 174, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 192, 174, 0.55) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.4;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 78%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 78%);
}
.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}
.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(34px, 6.2vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.page-faq .faq-hero .lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.75;
  color: var(--ink-2);
}
.page-faq .faq-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.page-faq .faq-figure {
  background: var(--chalk);
  padding: 14px 16px;
}
.page-faq .faq-figure dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--turf-deep);
}
.page-faq .faq-figure dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-style: italic;
  font-weight: 700;
  font-size: 28px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.page-faq .faq-figure dd span {
  font-size: 14px;
  font-style: normal;
  margin-left: 2px;
  color: var(--turf-deep);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-block: clamp(40px, 6vw, 80px) 0;
  align-items: start;
}

/* ---------- 左侧分类目录 ---------- */
.page-faq .faq-index {
  min-width: 0;
}
.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--turf-deep);
}
.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: 10px;
  padding: 10px 4px 10px 16px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink-2);
  text-decoration: none;
  transition: color 120ms ease-out;
}
.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--rule);
  transition: width 120ms ease-out, background 120ms ease-out;
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link.is-active {
  color: var(--ink);
}
.page-faq .faq-index__link:hover::before,
.page-faq .faq-index__link.is-active::before {
  width: 4px;
  background: var(--turf);
}
.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--rule);
  transition: color 120ms ease-out;
}
.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link.is-active .faq-index__num {
  color: var(--turf-deep);
}
.page-faq .faq-index__cta {
  margin-top: 22px;
  display: inline-flex;
  width: 100%;
  justify-content: center;
}

/* ---------- 右侧问答流 ---------- */
.page-faq .faq-flow {
  min-width: 0;
}
.page-faq .faq-flow > * + * {
  margin-top: clamp(44px, 5.5vw, 78px);
}

.page-faq .faq-cat {
  scroll-margin-top: 88px;
}
.page-faq .faq-cat__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink);
}
.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--turf);
}
.page-faq .faq-cat__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(23px, 3vw, 36px);
  line-height: 1.1;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.page-faq .faq-cat__intro {
  margin: 16px 0 24px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-faq .faq-cat__media {
  margin: 0 0 8px;
  border: 1px solid var(--rule);
  background: var(--paper-2);
}
.page-faq .faq-cat__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-cat__media .figure-note {
  margin: 10px 12px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-item {
  display: grid;
  gap: 12px;
  padding: 20px 0;
  border-top: 1px solid var(--rule);
}
.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--rule);
}
.page-faq .faq-item__main {
  min-width: 0;
}
.page-faq .faq-item__q {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.3;
  letter-spacing: 0;
  color: var(--ink);
}
.page-faq .faq-item__a {
  position: relative;
  margin: 10px 0 0;
  padding-left: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-faq .faq-item__a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.32em;
  bottom: 0.32em;
  width: 3px;
  background: var(--whistle);
}

/* 窄栏示例数据 */
.page-faq .faq-item__spec {
  border: 1px solid var(--rule);
  background: var(--chalk);
  padding: 12px 14px;
}
.page-faq .faq-item__spec-key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.5;
  color: var(--ink-2);
}
.page-faq .faq-item__spec-val {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-style: italic;
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--turf-deep);
}

/* ---------- 折叠面板 ---------- */
.page-faq .faq-item .fold {
  margin-top: 14px;
  border: 1px solid var(--rule);
  background: var(--chalk);
}
.page-faq .fold__head {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 11px 14px;
  border: 0;
  background: var(--paper-2);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  transition: background 120ms ease-out;
}
.page-faq .fold__head:hover {
  background: #ded4c1;
}
.page-faq .fold__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--turf-deep);
  flex: none;
}
.page-faq .fold__title {
  flex: 1;
  min-width: 0;
}
.page-faq .fold__sign {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
}
.page-faq .fold__sign::before,
.page-faq .fold__sign::after {
  content: "";
  position: absolute;
  background: var(--ink-2);
  transition: opacity 160ms ease-out;
}
.page-faq .fold__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}
.page-faq .fold__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}
.page-faq .fold__head[aria-expanded="true"] .fold__sign::after {
  opacity: 0;
}
.page-faq .fold__body {
  padding: 14px;
  border-top: 1px solid var(--rule);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-faq .fold__body > *:first-child {
  margin-top: 0;
}
.page-faq .fold__body > *:last-child {
  margin-bottom: 0;
}
.page-faq .fold__body p {
  margin: 0 0 0.9em;
}

/* ---------- 折叠内的字段条 ---------- */
.page-faq .faq-fields {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.page-faq .faq-fields > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 10px;
  background: var(--chalk);
}
.page-faq .faq-fields dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--turf-deep);
}
.page-faq .faq-fields dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-style: italic;
  color: var(--ink);
  text-align: right;
}

/* ---------- 中段图版 ---------- */
.page-faq .faq-plate {
  margin: 0 auto;
  max-width: 520px;
  padding: 14px;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  box-shadow: 4px 4px 0 rgba(201, 192, 174, 0.45);
}
.page-faq .faq-plate img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-plate .figure-note {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* ---------- 结尾入口 ---------- */
.page-faq .faq-next {
  border-top: 2px solid var(--ink);
  margin-top: clamp(48px, 6vw, 88px);
  padding-top: clamp(24px, 3vw, 40px);
}
.page-faq .faq-next__title {
  margin: 0 0 24px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.15;
  color: var(--ink);
}
.page-faq .faq-next__grid {
  display: grid;
  gap: 14px;
}
.page-faq .faq-next__card {
  display: grid;
  gap: 8px;
  padding: 20px 18px;
  border: 1px solid var(--rule);
  background: var(--chalk);
  color: var(--ink);
  text-decoration: none;
  transition: transform 120ms ease-out, border-color 120ms ease-out;
}
.page-faq .faq-next__card:hover {
  transform: translateY(-2px);
  border-color: var(--turf);
}
.page-faq .faq-next__card .mono-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--turf-deep);
}
.page-faq .faq-next__card strong {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.25;
  color: var(--ink);
}
.page-faq .faq-next__desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-2);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-item--split {
    grid-template-columns: minmax(0, 1fr) var(--faq-spec-w);
    gap: 26px;
    align-items: start;
  }
  .page-faq .faq-item__spec {
    text-align: right;
  }
  .page-faq .faq-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.9fr);
    align-items: end;
  }
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
  }
  .page-faq .faq-index {
    position: sticky;
    top: clamp(24px, 4vw, 48px);
    padding-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-index__link::before,
  .page-faq .faq-next__card,
  .page-faq .fold__head,
  .page-faq .fold__sign::before,
  .page-faq .fold__sign::after {
    transition: none;
  }
  .page-faq .faq-next__card:hover {
    transform: none;
  }
}