.page-faq {
  padding-top: clamp(18px, 3.6vw, 42px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-faq .faq-hero {
  position: relative;
  padding-bottom: clamp(18px, 2.6vw, 30px);
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  left: -8%;
  width: 78%;
  height: 260px;
  background: radial-gradient(58% 100% at 18% 12%, rgba(47, 240, 203, .15), rgba(10, 14, 13, 0) 72%);
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-title {
  margin: 14px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.6vw, 48px);
  line-height: 1.06;
  color: var(--c-text);
}

.page-faq .faq-lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 46em;
  color: var(--c-muted);
}

.page-faq .faq-quicklinks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  background: var(--c-glass);
  color: var(--c-text);
  font-size: 14px;
  text-decoration: none;
  transition: border-color .16s var(--ease), color .16s var(--ease), background-color .16s var(--ease);
}

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

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(24px, 4vw, 46px);
}

/* ---------- 索引轨道 ---------- */

.page-faq .faq-index {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-deep);
  padding: 14px 16px 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-orange-soft);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 7px 12px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  color: var(--c-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

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

.page-faq .faq-index__num {
  font-size: 11px;
  color: var(--c-cyan-dim);
}

.page-faq .faq-index__note {
  display: none;
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--c-line);
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(30px, 5vw, 58px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.14;
  color: var(--c-text);
}

.page-faq .faq-group__hint {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-muted);
}

.page-faq .faq-group__lede {
  max-width: 44em;
  margin: 12px 0 0;
  color: var(--c-muted);
}

/* ---------- 三步 ---------- */

.page-faq .faq-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--c-line);
}

.page-faq .faq-step {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--c-deep);
}

.page-faq .faq-step__num {
  display: block;
  font-size: 26px;
  line-height: 1;
  color: var(--c-orange);
}

.page-faq .faq-step__title {
  margin: 10px 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--c-text);
}

.page-faq .faq-step p {
  margin: 0;
  color: var(--c-muted);
  font-size: 15.5px;
  line-height: 1.72;
}

/* ---------- 图 ---------- */

.page-faq .faq-figure {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: var(--c-deep);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ---------- 手风琴 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 10px;
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-item {
  border: 1px solid var(--c-line);
  border-left: 3px solid transparent;
  border-radius: var(--radius-s);
  background: var(--c-deep);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--c-cyan-dim);
  border-left-color: var(--c-cyan-dim);
}

.page-faq .faq-item[open] {
  border-left-color: var(--c-cyan);
  background: var(--c-glass);
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 16px 16px 18px;
  color: var(--c-text);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
}

.page-faq .faq-q::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--c-cyan);
  transition: transform .2s var(--ease);
}

.page-faq .faq-item[open] .faq-q::after {
  transform: rotate(45deg);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -4px;
  border-radius: var(--radius-s);
}

.page-faq .faq-a {
  padding: 0 18px 18px;
  border-top: 1px solid var(--c-line);
  margin-top: -1px;
  padding-top: 14px;
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 60ch;
  color: var(--c-muted);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-faq .faq-num {
  color: var(--c-orange-soft);
  font-weight: 700;
}

.page-faq .faq-meta {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
}

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 88px;
    padding: 20px 18px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    width: 100%;
    padding: 9px 10px;
    border: 0;
    border-left: 3px solid transparent;
    border-radius: 0;
    color: var(--c-muted);
    font-size: 15px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--c-cyan);
    background: var(--c-glass);
    color: var(--c-text);
  }

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

  .page-faq .faq-index__note {
    display: block;
  }

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

  .page-faq .faq-q {
    padding: 18px 20px;
    font-size: 17px;
  }

  .page-faq .faq-a {
    padding: 16px 20px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-q::after,
  .page-faq .faq-quick,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .faq-item:hover,
  .page-faq .faq-item[open] {
    transform: none;
  }
}