.page-faq {
  display: block;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: 18px;
  padding-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}
.page-faq .breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
}
.page-faq .breadcrumb a:hover {
  color: var(--vermilion-dark);
}
.page-faq .breadcrumb__sep {
  margin: 0 8px;
  color: var(--copper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background: var(--teal);
  color: var(--on-dark);
  overflow: hidden;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(112deg, rgba(233, 227, 214, .07) 0 1px, transparent 1px 16px);
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -70px;
  width: 300px;
  height: 300px;
  border: 1px solid rgba(169, 123, 51, .45);
  transform: rotate(18deg);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 48px;
  padding-bottom: 42px;
}
.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--copper-soft);
}
.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  max-width: 20em;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper);
}
.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--on-dark);
}

.page-faq .faq-meta {
  margin: 30px 0 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(233, 227, 214, .22);
  border: 1px solid rgba(233, 227, 214, .22);
}
.page-faq .faq-meta > div {
  background: var(--teal);
  padding: 14px 16px;
  min-width: 0;
}
.page-faq .faq-meta dt {
  margin-bottom: 7px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--copper-soft);
}
.page-faq .faq-meta dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  font-variant-numeric: tabular-nums;
  color: var(--on-dark);
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-index {
  background: var(--paper-2);
  border-bottom: 1px solid var(--grid);
}
.page-faq .faq-index__list {
  margin: 0;
  padding-top: 14px;
  padding-bottom: 14px;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 14px;
}
.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 2px;
  min-width: 0;
  border-bottom: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--speed), color var(--speed);
}
.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-bottom-color: var(--vermilion);
  color: var(--vermilion-dark);
}
.page-faq .faq-index__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--copper);
}

/* ---------- 正文骨架 ---------- */
.page-faq .faq-body {
  padding-top: 4px;
  padding-bottom: 20px;
}
.page-faq .faq-group {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: 32px 0 28px;
  border-top: 1px solid var(--grid);
  scroll-margin-top: 110px;
}
.page-faq .faq-group:first-child {
  border-top: 0;
}
.page-faq .faq-group__rail {
  min-width: 0;
}
.page-faq .faq-group__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--copper);
}
.page-faq .faq-group__title {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--ink);
}
.page-faq .faq-group__tag {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--grid);
  border-left: 3px solid var(--copper);
  background: var(--paper-2);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--ink-soft);
}
.page-faq .faq-group__body {
  min-width: 0;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--grid);
}
.page-faq .qa__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  padding: 15px 0 15px 16px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
  transition: color var(--speed);
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q::marker {
  content: "";
}
.page-faq .qa__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  background: var(--vermilion);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--speed) ease;
}
.page-faq .qa[open] > .qa__q::before {
  transform: scaleY(1);
}
.page-faq .qa__q:hover {
  color: var(--vermilion-dark);
}
.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
}
.page-faq .qa__icon {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 6px;
}
.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  background: var(--copper);
  transition: transform var(--speed) ease, background-color var(--speed) ease;
}
.page-faq .qa__icon::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 2px;
}
.page-faq .qa__icon::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
}
.page-faq .qa[open] .qa__icon::before {
  background: var(--vermilion);
}
.page-faq .qa[open] .qa__icon::after {
  transform: scaleY(0);
}

.page-faq .qa__a {
  margin: 0 0 18px 16px;
  padding: 14px 15px;
  border: 1px solid var(--grid);
  background: var(--paper-2);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-faq .qa__a p {
  margin: 0 0 10px;
}
.page-faq .qa__a p:last-child {
  margin-bottom: 0;
}
.page-faq .qa__a .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  border-bottom: 1.5px solid var(--copper);
  padding-bottom: 1px;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 2px;
  padding: 10px;
  border: 1px solid var(--grid);
  background: var(--paper-2);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 1px solid var(--grid);
  background: var(--paper);
}
.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  margin-top: 10px;
  background: var(--indigo);
  color: var(--on-dark);
}
.page-faq .faq-outro__inner {
  padding-top: 42px;
  padding-bottom: 46px;
}
.page-faq .faq-outro .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--copper-soft);
}
.page-faq .faq-outro h2 {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 34px);
  line-height: 1.28;
  letter-spacing: -.02em;
  color: var(--paper);
}
.page-faq .faq-outro .copy {
  margin: 0 0 22px;
  max-width: 48em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--on-dark);
}
.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-faq .faq-outro .btn.btn--ghost {
  border-color: rgba(233, 227, 214, .5);
  color: var(--on-dark);
}
.page-faq .faq-outro .btn.btn--ghost:hover {
  border-color: var(--copper-soft);
  color: var(--paper);
}

/* ---------- 入场 ---------- */
.page-faq [data-reveal] {
  transform: translateY(14px);
  transition: transform .5s ease;
}
.page-faq [data-reveal].is-visible {
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-index__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-hero__inner {
    padding-top: 60px;
    padding-bottom: 52px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-group {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 36px;
    padding: 44px 0 38px;
  }
  .page-faq .faq-group__rail {
    position: sticky;
    top: 108px;
    align-self: start;
  }
  .page-faq .qa__q {
    font-size: 18px;
    padding: 18px 0 18px 18px;
  }
  .page-faq .qa__q::before {
    top: 16px;
    bottom: 16px;
  }
  .page-faq .qa__a {
    margin-left: 18px;
    margin-bottom: 22px;
    padding: 16px 20px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
  .page-faq .faq-group {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__q::before,
  .page-faq .qa__icon::before,
  .page-faq .qa__icon::after,
  .page-faq .faq-index__list a,
  .page-faq [data-reveal] {
    transition: none;
  }
  .page-faq [data-reveal] {
    transform: none;
  }
}