.page-faq {
  --faq-line: rgba(192, 138, 62, 0.28);
  --faq-line-strong: rgba(192, 138, 62, 0.55);
  --faq-rail-w: 236px;
  --faq-indent: 58px;
}

/* ---------- 页头 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 48px 0 56px;
  background:
    radial-gradient(720px 300px at 84% 8%, rgba(240, 217, 168, 0.09), transparent 70%),
    var(--ink);
  border-bottom: 1px solid var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: center;
}

.page-faq .faq-hero__eyebrow {
  margin: 18px 0 0;
  color: var(--graphite);
}

.page-faq .faq-hero__title {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.6vw, 3.3rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-body);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--faq-line);
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--copper);
}

.page-faq .faq-hero__meta .mono {
  font-family: var(--font-mono);
  color: var(--copper-bright);
}

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

.page-faq .faq-hero__figure .media-frame {
  border: 1px solid var(--faq-line);
}

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

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  padding: 52px 0 76px;
  background: var(--ink);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

/* ---------- 左侧主题索引 ---------- */
.page-faq .faq-index-col {
  min-width: 0;
}

.page-faq .faq-index {
  border-left: 1px solid var(--faq-line);
  padding-left: 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  color: var(--graphite);
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 8px 8px 8px 10px;
  border-left: 2px solid transparent;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.6;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover {
  color: var(--white);
  background: var(--wash-copper);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--copper-bright);
  outline-offset: 2px;
}

.page-faq .faq-index__link[data-active="true"] {
  color: var(--copper-bright);
  border-left-color: var(--copper);
  background: var(--wash-copper);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--copper);
}

.page-faq .faq-index__foot {
  margin: 18px 0 0;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--graphite);
}

/* ---------- 主内容 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .filter-bar {
  margin-bottom: 18px;
}

.page-faq .filter-empty {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--graphite);
}

.page-faq .faq-note {
  margin: 0 0 44px;
  padding: 24px 26px;
}

.page-faq .faq-note__label {
  margin: 0 0 10px;
  color: var(--cinnabar);
}

.page-faq .faq-note__text {
  margin: 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-bottom: 54px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 8px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line-strong);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--copper);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.2vw, 1.7rem);
  line-height: 1.3;
  color: var(--white);
}

.page-faq .faq-group__desc {
  grid-column: 2;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-items {
  display: block;
}

.page-faq .faq-item {
  position: relative;
  padding-left: 14px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--copper-bright), var(--copper));
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-item[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px;
  padding: 17px 4px 17px 2px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  font-size: 16.5px;
  line-height: 1.62;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--copper-bright);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--copper-bright);
  outline-offset: 3px;
}

.page-faq .faq-item__id {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--copper);
  padding-top: 4px;
}

.page-faq .faq-item__mark {
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 7px;
  flex: none;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--copper);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 1px;
}

.page-faq .faq-item__mark::after {
  left: 5px;
  top: 0;
  width: 1px;
  height: 12px;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--copper-bright);
}

.page-faq .faq-item__a {
  padding: 0 20px 22px var(--faq-indent);
  color: var(--text-body);
  font-size: 15.5px;
  line-height: 1.86;
  animation: faqReveal 200ms var(--ease);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 58ch;
}

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

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 46px;
}

.page-faq .faq-figure .media-frame {
  border: 1px solid var(--faq-line);
}

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

.page-faq .faq-figure .media-frame__cap {
  position: static;
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--graphite);
}

/* ---------- 收束 ---------- */
.page-faq .faq-tail {
  margin-top: 8px;
  padding-top: 34px;
  border-top: 1px solid var(--faq-line-strong);
}

.page-faq .faq-tail__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.3rem, 2.3vw, 1.8rem);
  color: var(--white);
}

.page-faq .faq-tail__text {
  margin: 0 0 22px;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-body);
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.page-faq .faq-tail__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-tail__links a {
  color: var(--copper);
  text-decoration: none;
  font-size: 14.5px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-tail__links a:hover {
  color: var(--copper-bright);
  border-bottom-color: var(--copper-bright);
}

.page-faq .faq-tail__links a:focus-visible {
  outline: 2px solid var(--copper-bright);
  outline-offset: 3px;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 767px) {
  .page-faq .faq-hero {
    padding: 32px 0 40px;
  }

  .page-faq .faq-index {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--faq-line);
    padding-top: 14px;
  }

  .page-faq .faq-index__list {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

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

  .page-faq .faq-index__link {
    grid-template-columns: none;
    gap: 4px;
    padding: 8px 12px;
    border-left: none;
    border: 1px solid var(--faq-line);
    white-space: nowrap;
    font-size: 13.5px;
  }

  .page-faq .faq-index__link[data-active="true"] {
    border-color: var(--copper);
  }

  .page-faq .faq-index__foot {
    display: none;
  }

  .page-faq .faq-body {
    padding: 36px 0 56px;
  }

  .page-faq .faq-note {
    padding: 20px 18px;
    margin-bottom: 34px;
  }

  .page-faq .faq-item {
    padding-left: 10px;
  }

  .page-faq .faq-item__a {
    padding: 0 6px 20px 0;
  }

  .page-faq .faq-group {
    margin-bottom: 42px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: auto minmax(0, 1fr);
  }
}

@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: 64px 0 68px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 52px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}