.page-faq {
  --faq-rail-w: 244px;
  --faq-gold-line: rgba(232, 181, 74, .55);
  --faq-panel: rgba(27, 31, 43, .62);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(84px, 13vw, 168px) clamp(44px, 7vw, 92px);
}

.page-faq .faq-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .faq-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.95), rgba(0,0,0,.25) 72%, transparent 100%);
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.95), rgba(0,0,0,.25) 72%, transparent 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse 46% 60% at 22% 0%, rgba(232, 181, 74, .16), transparent 68%),
    linear-gradient(180deg, rgba(7, 8, 12, .62) 0%, rgba(7, 8, 12, .8) 58%, var(--void) 100%);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2.4vw, 28px);
  max-width: 900px;
}

.page-faq .faq-hero-inner h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(38px, 6.6vw, 90px);
  line-height: 1.08;
  letter-spacing: .03em;
  color: var(--warm);
}

.page-faq .faq-hero-inner .lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.85;
  color: var(--warm-72);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 6px;
}

/* ---------- 检索示意 ---------- */
.page-faq .faq-search-zone {
  padding-block: clamp(48px, 7vw, 96px);
}

.page-faq .faq-search-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
}

.page-faq .faq-search-intro .section-title {
  margin: 10px 0 16px;
}

.page-faq .faq-search-lede {
  margin: 0 0 26px;
  max-width: 46ch;
  color: var(--warm-72);
  line-height: 1.85;
}

.page-faq .faq-search-figure {
  margin: 0;
  border-radius: var(--r-md) var(--r-lg) var(--r-xs) var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--stroke-soft);
}

.page-faq .faq-search-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .78;
}

.page-faq .search-demo {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--gold-16);
  border-radius: var(--r-lg) var(--r-xs) var(--r-lg) var(--r-lg);
  background: linear-gradient(158deg, rgba(27, 31, 43, .94), rgba(16, 19, 27, .78));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.page-faq .search-demo::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 214, 245, .16), transparent 70%);
  pointer-events: none;
}

.page-faq .search-field {
  display: block;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gold-40);
}

.page-faq .search-label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-faq .search-input {
  width: 100%;
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: var(--warm);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
}

.page-faq .search-input::placeholder {
  color: var(--warm-56);
}

.page-faq .search-input:focus-visible {
  outline: 2px solid var(--electric);
  outline-offset: 6px;
  border-radius: var(--r-xs);
}

.page-faq .search-count {
  margin: 18px 0 4px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ash);
}

.page-faq .search-hits {
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .search-hit {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
  justify-content: space-between;
  padding: 13px 0;
  border-top: 1px solid var(--stroke-soft);
}

.page-faq .search-hit[hidden] {
  display: none;
}

.page-faq .search-hit-title {
  color: var(--warm-86);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .search-hit-title:hover {
  color: var(--gold);
  border-bottom-color: var(--gold-40);
}

.page-faq .search-hit.is-hit .search-hit-title {
  color: var(--electric);
}

.page-faq .search-hit-meta {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ash);
}

.page-faq .search-empty {
  margin: 14px 0 0;
  font-size: 14px;
  color: var(--ash);
}

/* ---------- 索引轨 + 分组 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(72px, 10vw, 140px);
}

.page-faq .faq-rail {
  padding-bottom: 6px;
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--ash);
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail-list > li {
  flex: 0 0 auto;
}

.page-faq .rail-link {
  display: inline-block;
  padding: 8px 15px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  color: var(--warm-72);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color .24s var(--ease), border-color .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .rail-link:hover {
  color: var(--gold);
  border-color: var(--gold-40);
}

.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(58px, 8vw, 108px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: clamp(14px, 2.4vw, 28px);
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-group-num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: clamp(38px, 6vw, 74px);
  font-weight: 300;
  line-height: .9;
  letter-spacing: .02em;
  color: transparent;
  -webkit-text-stroke: 1.1px var(--gold-40);
}

.page-faq .faq-group-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-group-meta .section-title {
  margin: 0;
  font-size: clamp(22px, 2.7vw, 34px);
  line-height: 1.32;
}

.page-faq .faq-group-meta .tag {
  align-self: flex-start;
}

/* ---------- 折叠条目 ---------- */
.page-faq .fold {
  border-top: 1px solid var(--stroke-soft);
}

.page-faq .fold-item {
  padding-left: clamp(14px, 2vw, 24px);
  border-left: 1px solid transparent;
  transition: border-color .32s var(--ease);
}

.page-faq .fold-item + .fold-item {
  border-top: 1px solid var(--stroke-soft);
}

.page-faq .fold-item[open] {
  border-left-color: var(--gold);
}

.page-faq .fold-summary {
  position: relative;
  display: block;
  padding: clamp(18px, 2.4vw, 26px) 44px clamp(18px, 2.4vw, 26px) 0;
  color: var(--warm);
  font-size: clamp(16px, 1.45vw, 19px);
  line-height: 1.62;
  cursor: pointer;
  list-style: none;
  transition: color .24s var(--ease);
}

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

.page-faq .fold-summary:hover {
  color: var(--gold);
}

.page-faq .fold-summary::after {
  content: "";
  position: absolute;
  right: 4px;
  top: 50%;
  width: 13px;
  height: 1px;
  background: var(--ash);
  transform: translateY(-50%);
  transition: background-color .28s var(--ease);
}

.page-faq .fold-summary::before {
  content: "";
  position: absolute;
  right: 4px;
  top: 50%;
  width: 13px;
  height: 1px;
  background: var(--ash);
  transform: translateY(-50%) rotate(90deg);
  transition: transform .32s var(--ease), background-color .28s var(--ease);
}

.page-faq .fold-item[open] > .fold-summary::before {
  transform: translateY(-50%) rotate(0deg);
  background: var(--gold);
}

.page-faq .fold-item[open] > .fold-summary::after {
  background: var(--gold);
}

.page-faq .fold-body {
  padding-bottom: clamp(18px, 2.4vw, 26px);
  color: var(--warm-72);
  line-height: 1.85;
}

.page-faq .fold-body p {
  margin: 0;
  max-width: 64ch;
}

.page-faq .faq-related {
  margin: 20px 0 0;
  font-size: 14px;
  color: var(--ash);
}

.page-faq .faq-related a {
  display: inline-block;
  margin-left: 12px;
  color: var(--warm-72);
  text-decoration: none;
  border-bottom: 1px solid var(--stroke);
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-related a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold-40);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact-panel {
  margin-top: clamp(26px, 4vw, 40px);
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--gold-16);
  border-radius: var(--r-xs) var(--r-lg) var(--r-lg) var(--r-lg);
  background:
    radial-gradient(ellipse 60% 120% at 100% 0%, rgba(139, 92, 246, .14), transparent 65%),
    linear-gradient(150deg, rgba(27, 31, 43, .82), rgba(16, 19, 27, .7));
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.page-faq .faq-contact-label {
  margin: 0 0 6px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ash);
}

.page-faq .faq-contact-value {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--warm);
  letter-spacing: .02em;
  word-break: break-word;
}

.page-faq .faq-contact-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-56);
}

.page-faq .faq-contact-panel .btn {
  justify-self: start;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-search-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: clamp(36px, 5vw, 68px);
  }

  .page-faq .faq-contact-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact-note,
  .page-faq .faq-contact-panel .btn {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(44px, 6vw, 88px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 40px);
    padding-bottom: 0;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail-list > li {
    width: 100%;
  }

  .page-faq .rail-link {
    display: block;
    padding: 12px 0 12px 18px;
    border: 0;
    border-left: 1px solid var(--stroke);
    border-radius: 0;
    font-size: 15px;
    white-space: normal;
    transition: color .24s var(--ease), border-color .24s var(--ease);
  }

  .page-faq .rail-link[aria-current="true"] {
    color: var(--gold);
    border-left-color: var(--gold);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fold-item,
  .page-faq .fold-summary,
  .page-faq .fold-summary::before,
  .page-faq .fold-summary::after,
  .page-faq .rail-link,
  .page-faq .search-hit-title,
  .page-faq .faq-related a {
    transition-duration: .01ms;
  }
}