.page-faq {
  --faq-rail-w: 236px;
  --faq-no-w: 2.6rem;
  --faq-gap: 10px;
  background: var(--bg);
  color: var(--fg);
}

/* 面包屑 */
.page-faq .crumbs {
  padding-top: clamp(20px, 3vw, 34px);
}
.page-faq .crumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--muted);
  opacity: 0.6;
}
.page-faq .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.page-faq .crumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 4vw, 54px) 0 clamp(34px, 5vw, 70px);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(620px 420px at 84% 16%, rgba(47, 230, 200, 0.15), transparent 72%),
    radial-gradient(460px 340px at 4% 92%, rgba(255, 107, 74, 0.11), transparent 70%);
}
.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  align-items: end;
}
.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-size: clamp(2.05rem, 5vw, 4.2rem);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: 0.02em;
  color: var(--fg-strong);
}
.page-faq .faq-hero__text .lede {
  margin: 20px 0 0;
  max-width: 46ch;
  color: var(--fg);
}
.page-faq .faq-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-faq .faq-hero__art img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--edge);
  border-radius: 2px;
  box-shadow: var(--shadow-hard);
  object-fit: cover;
}

/* 主框架：左索引 + 右问答 */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
  align-items: start;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .faq-rail {
  border-top: 2px solid var(--cyan);
  padding-top: 14px;
}
.page-faq .faq-rail__label {
  margin: 0 0 10px;
  color: var(--muted);
}
.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-left: 2px solid var(--edge-soft);
  color: var(--fg);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}
.page-faq .faq-rail__list a:hover {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(47, 230, 200, 0.06);
}
.page-faq .faq-rail__no {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

/* 分类区块 */
.page-faq .faq-block {
  scroll-margin-top: 96px;
  padding-top: clamp(6px, 1vw, 14px);
}
.page-faq .faq-block + .faq-block {
  margin-top: clamp(38px, 5vw, 66px);
  padding-top: clamp(30px, 4vw, 46px);
  border-top: 1px solid var(--edge-soft);
}
.page-faq .faq-block__head {
  margin-bottom: clamp(14px, 2vw, 22px);
}
.page-faq .faq-block__title {
  margin: 8px 0 0;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--fg-strong);
}
.page-faq .faq-block__note {
  margin: 10px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 折叠问答 */
.page-faq .faq-item {
  border-bottom: 2px solid var(--edge-soft);
  transition: border-color var(--ease);
}
.page-faq .faq-item[open] {
  border-bottom-color: var(--cyan);
}
.page-faq .faq-item__sum {
  display: grid;
  grid-template-columns: var(--faq-no-w) minmax(0, 1fr) 1.6rem;
  gap: var(--faq-gap);
  align-items: baseline;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 1.15vw, 17px);
  line-height: 1.6;
  color: var(--fg-strong);
}
.page-faq .faq-item__sum::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__sum::marker {
  content: "";
}
.page-faq .faq-item__no {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.page-faq .faq-item__q {
  transition: color var(--ease);
}
.page-faq .faq-item__sum:hover .faq-item__q {
  color: var(--cyan);
}
.page-faq .faq-item[open] .faq-item__q {
  color: var(--cyan);
}
.page-faq .faq-item__mark {
  position: relative;
  justify-self: end;
  align-self: center;
  width: 14px;
  height: 14px;
}
.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--ease), opacity var(--ease);
}
.page-faq .faq-item__mark::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
}
.page-faq .faq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
}
.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}
.page-faq .faq-item__body {
  padding: 0 0 22px;
}
.page-faq .faq-item__body p {
  margin: 0;
  max-width: 68ch;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--fg);
}

/* 配图 */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 30px) 0 4px;
  max-width: 560px;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--edge);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
  object-fit: cover;
}
.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--muted);
}

/* 相关条目 */
.page-faq .faq-rel {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  padding-bottom: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-faq .faq-rel::-webkit-scrollbar {
  height: 6px;
}
.page-faq .faq-rel::-webkit-scrollbar-thumb {
  background: var(--edge-soft);
  border-radius: 999px;
}
.page-faq .faq-rel__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 2px solid var(--edge-soft);
  border-radius: 2px;
  color: var(--fg);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--ease), color var(--ease), transform var(--ease);
}
.page-faq .faq-rel__link span {
  color: var(--coral);
}
.page-faq .faq-rel__link:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

/* 材料清单与联系 */
.page-faq .faq-assist {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}
.page-faq .faq-card {
  padding: clamp(20px, 3vw, 30px);
  background: var(--surface);
  border: 2px solid var(--edge);
  border-radius: 2px;
  box-shadow: var(--shadow-hard);
}
.page-faq .faq-card--accent {
  border-left: 8px solid var(--coral);
}
.page-faq .faq-card .idx {
  margin: 0 0 14px;
  color: var(--mist);
}
.page-faq .faq-card__lead {
  margin: 0 0 16px;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--fg);
}
.page-faq .material-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .material-list li {
  position: relative;
  padding-left: 30px;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--fg-strong);
}
.page-faq .material-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.34em;
  width: 14px;
  height: 14px;
  border: 2px solid var(--cyan);
  border-radius: 2px;
}
.page-faq .material-list li::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.58em;
  width: 6px;
  height: 3px;
  border-left: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(-45deg);
}
.page-faq .faq-card__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}
.page-faq .faq-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .faq-contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--edge-soft);
  font-size: 15px;
}
.page-faq .faq-contact li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.page-faq .faq-contact__k {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  min-width: 2.5rem;
}
.page-faq .faq-contact a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease);
}
.page-faq .faq-contact a:hover {
  border-bottom-color: var(--cyan);
}

/* 响应式 */
@media (min-width: 720px) {
  .page-faq .faq-item__body {
    padding-left: calc(var(--faq-no-w) + var(--faq-gap));
    padding-right: 1.6rem;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-assist {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 5fr 7fr;
    gap: clamp(36px, 5vw, 72px);
  }
  .page-faq .faq-hero__art {
    margin-bottom: 0;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-rel__link,
  .page-faq .faq-rail__list a,
  .page-faq .crumbs a,
  .page-faq .faq-contact a {
    transition-duration: 0ms;
  }
}