.page-faq {
  --faq-pad: 18px;
  --faq-rail: 250px;
  background: var(--ink);
  color: var(--mist);
  font-family: var(--sans);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 34px 0 52px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(760px 380px at 88% -12%, rgba(53, 208, 196, .12), transparent 70%),
    radial-gradient(620px 340px at 4% 112%, rgba(242, 166, 59, .08), transparent 72%);
  overflow: hidden;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 32px;
  align-items: end;
}

.page-faq .crumb {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  margin-bottom: 18px;
}

.page-faq .crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .crumb a:hover,
.page-faq .crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .crumb__sep {
  margin: 0 8px;
  color: var(--line);
}

.page-faq .eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-faq .faq-hero h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(29px, 5.4vw, 50px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--mist);
  margin: 0;
  max-width: 19ch;
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 56ch;
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-faq .faq-hero__meta li {
  border: 1px solid var(--line);
  background: rgba(18, 40, 62, .72);
  padding: 7px 13px;
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: .02em;
}

.page-faq .faq-hero__meta .num {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--amber);
  margin-right: 3px;
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--indigo);
  overflow: hidden;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  opacity: .9;
}

.page-faq .faq-hero__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 7px 14px;
  background: var(--amber);
  color: #24170a;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .05em;
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-body {
  padding: 44px 0 76px;
}

.page-faq .faq-body__grid {
  display: grid;
  gap: 30px;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  background: var(--indigo);
  padding: 18px 16px;
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--geo);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--mist);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--muted);
  text-decoration: none;
  font-size: 13.5px;
  transition: color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--mist);
  border-left-color: var(--cyan);
  background: rgba(53, 208, 196, .08);
}

.page-faq .faq-index__num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-index__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-faq .faq-index__count {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--amber);
}

.page-faq .faq-index__top {
  display: inline-block;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  width: 100%;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  transition: color .16s var(--ease);
}

.page-faq .faq-index__top:hover,
.page-faq .faq-index__top:focus-visible {
  color: var(--cyan);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  margin-bottom: 48px;
  scroll-margin-top: 108px;
}

.page-faq .faq-group--last {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 6px;
}

.page-faq .faq-group__idx {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-faq .faq-group__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 32px);
  line-height: 1.22;
  color: var(--mist);
  margin: 0;
}

.page-faq .faq-group__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 62ch;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  border-top: 0;
}

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line);
  transition: background .16s var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: transparent;
  transition: background .16s var(--ease);
}

.page-faq .faq-item:hover {
  background: rgba(23, 52, 80, .5);
}

.page-faq .faq-item[data-open]::before,
.page-faq .faq-item:has(.drawer__title[aria-expanded="true"])::before {
  background: var(--cyan);
}

.page-faq .faq-q {
  margin: 0;
  font-weight: inherit;
}

.page-faq .faq-q .drawer__title {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 18px;
  gap: 10px;
  align-items: baseline;
  width: 100%;
  padding: var(--faq-pad) 10px var(--faq-pad) 14px;
  background: none;
  border: 0;
  text-align: left;
  color: var(--mist);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  cursor: pointer;
  transition: color .16s var(--ease);
}

.page-faq .faq-q .drawer__title:hover,
.page-faq .faq-q .drawer__title:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-q__num {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--amber);
}

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

.page-faq .faq-q .drawer__sign {
  position: relative;
  display: block;
  width: 12px;
  height: 12px;
  align-self: center;
  transition: transform .18s var(--ease);
}

.page-faq .faq-q .drawer__sign::before,
.page-faq .faq-q .drawer__sign::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: background .16s var(--ease);
}

.page-faq .faq-q .drawer__sign::before {
  top: 5px;
  left: 0;
  width: 12px;
  height: 1px;
}

.page-faq .faq-q .drawer__sign::after {
  top: 0;
  left: 5px;
  width: 1px;
  height: 12px;
}

.page-faq .faq-item[data-open] .faq-q .drawer__sign,
.page-faq .faq-item:has(.drawer__title[aria-expanded="true"]) .faq-q .drawer__sign {
  transform: rotate(90deg);
}

.page-faq .faq-item[data-open] .faq-q .drawer__sign::after,
.page-faq .faq-item:has(.drawer__title[aria-expanded="true"]) .faq-q .drawer__sign::after {
  opacity: 0;
}

.page-faq .faq-item .drawer__body {
  overflow: hidden;
  max-height: 0;
  transition: max-height .22s var(--ease);
}

.page-faq .faq-item[data-open] .drawer__body,
.page-faq .faq-item:has(.drawer__title[aria-expanded="true"]) .drawer__body {
  max-height: 520px;
}

.page-faq .faq-item .drawer__inner {
  padding: 0 16px 22px 62px;
}

.page-faq .faq-a {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
  max-width: 66ch;
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 208, 196, .45);
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-copy {
  margin-top: 14px;
  padding: 5px 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible,
.page-faq .faq-copy.is-copied {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 全宽提示条 ---------- */
.page-faq .faq-note {
  margin: 0 0 44px;
  padding: 16px 20px;
  border: 1px solid var(--amber);
  background: linear-gradient(96deg, rgba(242, 166, 59, .12), rgba(242, 166, 59, .02));
  display: grid;
  gap: 8px;
}

.page-faq .faq-note__tag {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-faq .faq-note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 74ch;
}

.page-faq .faq-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 208, 196, .5);
}

.page-faq .faq-note a:hover,
.page-faq .faq-note a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 双端对照图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 4px;
  border: 1px solid var(--line);
  background: var(--indigo);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: .9;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: .02em;
}

/* ---------- 联系前准备 ---------- */
.page-faq .faq-help {
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  background: var(--indigo);
  padding: 26px 22px;
}

.page-faq .faq-help__label {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.3;
  color: var(--mist);
  max-width: 26ch;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 12px 14px;
  background: var(--ink);
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .faq-help__n {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--amber);
  letter-spacing: .04em;
}

.page-faq .faq-help__text {
  margin: 22px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 72ch;
}

.page-faq .faq-help__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 208, 196, .5);
}

.page-faq .faq-help__text a:hover,
.page-faq .faq-help__text a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-help__acts {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 44px 0 66px;
  }

  .page-faq .faq-hero__meta li {
    padding: 8px 15px;
    font-size: 13px;
  }

  .page-faq .faq-body {
    padding: 60px 0 96px;
  }

  .page-faq .faq-index {
    padding: 20px;
  }

  .page-faq .faq-q .drawer__title {
    grid-template-columns: 44px minmax(0, 1fr) 18px;
    gap: 12px;
    font-size: 16.5px;
    padding: 20px 12px 20px 16px;
  }

  .page-faq .faq-item .drawer__inner {
    padding: 0 18px 24px 72px;
  }

  .page-faq .faq-note {
    padding: 18px 24px;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .faq-help {
    padding: 34px 32px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 48px;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-group {
    margin-bottom: 60px;
  }

  .page-faq .faq-group__head {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr);
    column-gap: 16px;
    align-items: baseline;
    padding-bottom: 18px;
  }

  .page-faq .faq-group__idx {
    margin-bottom: 0;
    grid-row: 1 / 3;
  }

  .page-faq .faq-group__title,
  .page-faq .faq-group__desc {
    grid-column: 2;
  }

  .page-faq .faq-list {
    padding-left: 72px;
  }

  .page-faq .faq-note {
    margin-left: 72px;
  }

  .page-faq .faq-figure {
    margin-left: 72px;
  }

  .page-faq .faq-help {
    margin-left: 72px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__inner {
    gap: 64px;
  }

  .page-faq .faq-body__grid {
    gap: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item .drawer__body,
  .page-faq .faq-index__list a,
  .page-faq .faq-q .drawer__title,
  .page-faq .faq-q .drawer__sign,
  .page-faq .faq-copy {
    transition: none;
  }
}