.page-faq {
  padding-bottom: var(--gap-section);
}

.page-faq .faq-intro {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 880px;
  padding: clamp(26px, 4.6vw, 54px) 0 var(--gap-block);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-intro .page-header__lede {
  color: var(--body-ink);
  font-size: 16px;
  line-height: 1.8;
}

.page-faq .faq-intro .page-header__meta {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 左右分栏外壳 ---------- */

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 6vw, 68px);
  padding-top: var(--gap-block);
}

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

.page-faq .faq-aside {
  display: flex;
  flex-direction: column;
  gap: 26px;
  min-width: 0;
}

/* ---------- 左栏：主题图 ---------- */

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--indigo);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

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

.page-faq .faq-figure--inline img {
  aspect-ratio: 12 / 5;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 左栏：分组目录 ---------- */

.page-faq .faq-nav__title {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-faq .faq-nav__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 12px;
  border-left: 1px solid var(--line);
  color: var(--body-ink);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  border-left-color: var(--ice);
  background: rgba(138, 221, 255, 0.07);
  color: var(--ice);
}

.page-faq .faq-nav__num {
  flex: none;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ice);
  font-variant-numeric: tabular-nums;
}

/* ---------- 左栏：提示块 ---------- */

.page-faq .faq-tip {
  padding: 16px 18px;
  background: var(--teal);
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
}

.page-faq .faq-tip strong {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-faq .faq-tip p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--body-ink);
}

/* ---------- 右栏：分组 ---------- */

.page-faq .faq-group {
  padding-bottom: clamp(34px, 4.6vw, 54px);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  padding-top: clamp(34px, 4.6vw, 54px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group--last {
  padding-bottom: 0;
}

.page-faq .faq-group__head {
  margin-bottom: 16px;
}

.page-faq .faq-group__kicker {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--aurora);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 29px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--pale);
}

/* ---------- 右栏：问答条目 ---------- */

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

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

.page-faq .faq-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 17px 46px 17px 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--pale);
  transition: color 0.18s ease;
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--ice);
}

.page-faq .faq-item summary:focus-visible {
  outline: 1px solid var(--amber);
  outline-offset: 3px;
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line);
  font-family: var(--font-num);
  font-size: 17px;
  line-height: 1;
  color: var(--ice);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
}

.page-faq .faq-answer {
  padding: 0 46px 24px 0;
  font-size: 15px;
  line-height: 1.84;
  color: var(--body-ink);
  animation: faq-open 0.26s ease-out;
}

.page-faq .faq-answer p {
  margin: 0 0 10px;
}

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

.page-faq .faq-answer a {
  color: var(--ice);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 行动区与底部条 ---------- */

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-bottombar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: clamp(38px, 5vw, 62px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-bottombar__link {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-bottombar__link:hover,
.page-faq .faq-bottombar__link:focus-visible {
  color: var(--ice);
  border-bottom-color: var(--line-ice);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) and (max-width: 999px) {
  .page-faq .faq-nav__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 18px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(228px, 292px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(268px, 330px) minmax(0, 1fr);
    gap: 84px;
  }
}

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

  .page-faq .faq-item summary::after,
  .page-faq .faq-nav__link,
  .page-faq .faq-bottombar__link {
    transition: none;
  }
}