.page-faq {
  --faq-index-w: 262px;
  --faq-gap: 20px;
  padding-top: 26px;
  padding-bottom: 88px;
}

.page-faq .breadcrumb {
  margin-bottom: 20px;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 26px;
  padding: 30px 22px;
  border-radius: var(--radius-l);
  background:
    radial-gradient(115% 130% at 88% 6%, rgba(25, 227, 209, 0.16), transparent 62%),
    linear-gradient(158deg, var(--ink-800) 0%, var(--ink-900) 64%);
  margin-bottom: 42px;
}

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

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(27px, 6vw, 46px);
  line-height: 1.16;
  letter-spacing: -0.012em;
  font-weight: 800;
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-faq .faq-hero__stat {
  flex: 1 1 118px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--panel);
}

.page-faq .faq-hero__stat-num {
  font-size: 25px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-hero__stat-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 左右分置主体 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  align-self: start;
  padding: 18px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: rgba(10, 37, 64, 0.6);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  padding-left: 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 10px 10px 14px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  font-size: 15px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text);
  background: rgba(25, 227, 209, 0.07);
  border-left-color: var(--cyan-soft);
  outline: none;
}

.page-faq .faq-index__link.is-active {
  color: var(--cyan);
  font-weight: 600;
  background: rgba(25, 227, 209, 0.11);
  border-left-color: var(--cyan);
}

.page-faq .faq-index__count {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .faq-index__link.is-active .faq-index__count {
  color: var(--cyan-soft);
}

/* ---------- 右侧答案区 ---------- */
.page-faq .faq-answers {
  display: flex;
  flex-direction: column;
  gap: 48px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-group__head h2 {
  flex: 1 1 auto;
  margin: 0;
  font-size: clamp(21px, 4vw, 30px);
  line-height: 1.24;
  letter-spacing: -0.008em;
  font-weight: 800;
}

.page-faq .faq-group__head .tag {
  flex: 0 0 auto;
}

.page-faq .faq-group__note {
  margin: 14px 0 6px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
}

/* ---------- 单条问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.25s var(--ease);
}

.page-faq .qa[open] {
  background: linear-gradient(180deg, rgba(18, 50, 75, 0.55), rgba(18, 50, 75, 0));
}

.page-faq .qa__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 8px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease);
}

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

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 8px;
}

.page-faq .qa__q-text {
  min-width: 0;
}

.page-faq .qa__chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--cyan);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .qa[open] .qa__chevron {
  transform: rotate(180deg);
  border-color: var(--cyan);
  background: rgba(25, 227, 209, 0.13);
}

.page-faq .qa__body {
  padding: 0 8px 20px;
  max-width: 68ch;
}

.page-faq .qa__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .qa__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 209, 0.42);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

/* ---------- 章节配图 ---------- */
.page-faq .faq-group__media {
  margin: 26px 0 0;
}

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

@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 38px 34px;
  }

  .page-faq .faq-body {
    gap: 36px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: 34px;
  }

  .page-faq .faq-hero__meta {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-hero__stat {
    flex: 0 0 auto;
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero {
    padding: 24px 16px;
  }

  .page-faq .faq-index {
    padding: 14px 12px;
  }

  .page-faq .qa__q {
    font-size: 15.5px;
    padding: 15px 4px;
  }

  .page-faq .qa__body {
    padding: 0 4px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__chevron,
  .page-faq .qa,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .qa[open] .qa__chevron {
    transform: none;
  }
}