.page-faq {
  --faq-rail: 236px;
  --faq-gap: 64px;
  display: block;
}

.page-faq .faq-top {
  padding-top: clamp(24px, 4vw, 44px);
}

.page-faq .breadcrumb {
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  max-width: 840px;
  padding-bottom: clamp(40px, 5vw, 64px);
}

.page-faq .faq-hero h1 {
  margin: 18px 0 22px;
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 66ch;
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-mid);
}

/* ---------- 首屏插图 ---------- */

.page-faq .faq-figure {
  padding-bottom: clamp(32px, 4vw, 52px);
}

.page-faq .faq-figure__box {
  margin: 0;
}

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

/* ---------- 主栅格 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: clamp(32px, 5vw, 56px) 0 clamp(72px, 9vw, 112px);
  align-items: start;
}

/* ---------- 左侧索引 ---------- */

.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-faq .faq-rail__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
}

.page-faq .faq-rail__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0 24px;
}

.page-faq .faq-rail__item {
  margin: 0;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: 15px;
  line-height: 1.4;
  color: var(--text-mid);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-rail__num {
  font-size: 12px;
  color: var(--text-faint);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--text);
  border-bottom-color: var(--green);
}

.page-faq .faq-rail__link:hover .faq-rail__num,
.page-faq .faq-rail__link:focus-visible .faq-rail__num {
  color: var(--green);
}

.page-faq .faq-rail__foot {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(48px, 6vw, 72px);
  padding-top: clamp(40px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "idx title"
    "note note";
  column-gap: 14px;
  row-gap: 10px;
  margin-bottom: 8px;
}

.page-faq .faq-group__index {
  grid-area: idx;
  margin: 0;
  align-self: baseline;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  grid-area: title;
  margin: 0;
  font-size: 22px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--text);
}

.page-faq .faq-group__note {
  grid-area: note;
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .qa:first-of-type {
  margin-top: 20px;
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 4px 18px 0;
  cursor: pointer;
  list-style: none;
  color: var(--text);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa__q::after {
  content: "";
  flex: 0 0 auto;
  align-self: center;
  margin-left: auto;
  width: 10px;
  height: 1px;
  background: var(--text-faint);
  transition: width 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .qa__q:hover {
  color: var(--green);
}

.page-faq .qa__q:hover::after {
  width: 22px;
  background: var(--green);
}

.page-faq .qa[open] .qa__q::after {
  width: 22px;
  background: var(--orange);
}

.page-faq .qa__num {
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--text-faint);
}

.page-faq .qa__text {
  font-size: 17px;
  font-weight: 300;
  line-height: 1.6;
}

.page-faq .qa__a {
  padding: 0 0 22px 46px;
}

.page-faq .qa[open] .qa__a {
  animation: faq-rise 0.24s var(--ease) both;
}

@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-mid);
}

.page-faq .qa__a a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--green-deep);
  transition: border-color 0.2s var(--ease);
}

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

.page-faq .qa-key {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  background: var(--ink-200);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 1px 6px;
}

/* ---------- 组内插图 ---------- */

.page-faq .faq-inline-figure {
  margin: 28px 0 32px;
}

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

/* ---------- 收尾 ---------- */

.page-faq .faq-coda {
  padding-top: 28px;
}

.page-faq .faq-coda__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-mid);
}

.page-faq .faq-coda__text a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--green-deep);
  transition: border-color 0.2s var(--ease);
}

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

/* ---------- 平板 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-rail__list {
    display: block;
  }

  .page-faq .faq-rail__link {
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 7px 0 7px 14px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--green);
    border-bottom-color: transparent;
  }

  .page-faq .faq-group__head {
    grid-template-columns: 44px 1fr;
    grid-template-areas:
      "idx title"
      "idx note";
    column-gap: 18px;
    row-gap: 12px;
  }

  .page-faq .qa__a {
    padding-left: 62px;
  }
}

/* ---------- 桌面：左右分置 ---------- */

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
    padding-top: clamp(48px, 5.5vw, 76px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-group__head {
    grid-template-columns: 56px 1fr;
  }

  .page-faq .qa__q {
    padding: 20px 4px 20px 0;
  }

  .page-faq .qa__a {
    padding-left: 74px;
    padding-bottom: 26px;
  }

  .page-faq .faq-inline-figure {
    margin: 32px 0 40px;
  }

  .page-faq .faq-figure__box {
    max-width: 900px;
  }
}

/* ---------- 减少动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .qa__q::after,
  .page-faq .faq-rail__link,
  .page-faq .qa__q {
    transition: none;
  }
}