.page-faq {
  --faq-index-w: 236px;
  --faq-sticky: 128px;
  position: relative;
}

.page-faq .faq-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--gold-hi);
  font-variant-numeric: tabular-nums;
}

/* ---------- 面包屑 ---------- */

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(26px, 4vw, 44px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--gold-hi);
  border-bottom-color: var(--line-strong);
  outline: none;
}

.page-faq .breadcrumb__sep {
  color: var(--line-strong);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6vw, 78px) 0 clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -20% -25% auto;
  height: 165%;
  pointer-events: none;
  background:
    linear-gradient(148deg, rgba(201, 162, 39, .13) 0%, rgba(201, 162, 39, 0) 46%),
    radial-gradient(86% 68% at 92% 2%, rgba(63, 224, 208, .10), rgba(63, 224, 208, 0) 62%),
    radial-gradient(72% 60% at 2% 98%, rgba(43, 27, 74, .55), rgba(43, 27, 74, 0) 72%);
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-faq .faq-hero__lead h1 {
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.2vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-hero__text {
  margin: 0;
  max-width: 32em;
  font-size: clamp(14.5px, 1.7vw, 16.5px);
  line-height: 1.85;
  color: rgba(234, 223, 200, .78);
}

.page-faq .faq-hero__aside {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background: linear-gradient(158deg, var(--panel) 0%, rgba(20, 58, 49, .7) 62%, rgba(43, 27, 74, .45) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
}

.page-faq .faq-hero__aside::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -1px;
  width: 46px;
  height: 46px;
  background: linear-gradient(225deg, rgba(201, 162, 39, .30), rgba(201, 162, 39, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero__aside-title {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--gold);
}

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

.page-faq .faq-hero__aside-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(234, 223, 200, .82);
}

.page-faq .faq-hero__aside-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(63, 224, 208, .14);
  align-self: center;
  animation: faq-pulse 2s var(--ease) infinite;
}

@keyframes faq-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(63, 224, 208, .14); }
  50% { box-shadow: 0 0 0 7px rgba(63, 224, 208, 0); }
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-body {
  padding-block: clamp(32px, 5vw, 64px) clamp(48px, 7vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

/* ---------- 左侧索引 ---------- */

.page-faq .faq-index__title {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-faq .faq-index__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 12px 11px 16px;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: 2px;
  height: 0;
  background: var(--gold);
  transform: translateY(-50%);
  transition: height .26s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--gold-hi);
  background: rgba(201, 162, 39, .07);
  outline: none;
}

.page-faq .faq-index__link:hover::before,
.page-faq .faq-index__link:focus-visible::before {
  height: 62%;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold);
  opacity: .85;
}

.page-faq .faq-index__foot {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-index__foot a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-index__foot a:hover,
.page-faq .faq-index__foot a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--gold-hi);
  outline: none;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: 128px;
  padding-top: clamp(30px, 5vw, 54px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-group:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* ---------- 图 ---------- */

.page-faq .faq-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-faq .figure-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 折叠面板 ---------- */

.page-faq .accordion {
  border-top: 1px solid var(--line-soft);
}

.page-faq .accordion__item {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .accordion__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  bottom: 13px;
  width: 2px;
  background: var(--cyan);
  opacity: 0;
  transition: opacity .22s var(--ease);
  pointer-events: none;
}

.page-faq .accordion__item[data-open]::before {
  opacity: 1;
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 4px 16px 18px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: clamp(16.5px, 2.1vw, 20px);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: .01em;
  color: var(--ink);
  transition: color .2s var(--ease);
}

.page-faq .accordion__trigger:hover {
  color: var(--gold-hi);
}

.page-faq .accordion__trigger:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .faq-chev {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 9px;
  border-right: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  transform: rotate(45deg);
  transition: transform .24s var(--ease), border-color .2s var(--ease);
}

.page-faq .accordion__item[data-open] .faq-chev {
  transform: rotate(-135deg);
  margin-top: 13px;
}

.page-faq .faq-answer {
  max-width: 44em;
  padding: 0 8px 20px 18px;
}

.page-faq .faq-answer p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(234, 223, 200, .78);
}

.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-answer__more {
  padding-top: 4px;
  font-size: 13.5px;
}

.page-faq .faq-answer__more a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-answer__more a:hover,
.page-faq .faq-answer__more a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--gold-hi);
  outline: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4.4fr);
    gap: clamp(32px, 5vw, 76px);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(44px, 6vw, 88px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
  }
}

@media (max-width: 560px) {
  .page-faq .accordion__trigger {
    padding: 14px 0 14px 14px;
  }

  .page-faq .faq-answer {
    padding: 0 0 18px 14px;
  }

  .page-faq .faq-hero__aside-list li {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-dot {
    animation: none;
  }

  .page-faq .faq-index__link::before,
  .page-faq .faq-chev,
  .page-faq .accordion__item::before,
  .page-faq .accordion__trigger,
  .page-faq .faq-index__link,
  .page-faq .breadcrumb a,
  .page-faq .faq-answer__more a {
    transition: none;
  }
}