.page-faq {
  --faq-index-w: 300px;
  --faq-gap: 72px;
  padding-block: 32px 96px;
}

/* ---------- 首屏主题区 ---------- */
.page-faq .faq-lede {
  position: relative;
  margin-top: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-lede::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 2px;
  background: var(--green);
  border-radius: var(--r-pill);
}

.page-faq .faq-lede .page-head__title {
  letter-spacing: -0.02em;
}

.page-faq .faq-lede__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-lede__stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-lede__stats .data-num {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--green);
  text-align: left;
  line-height: 1;
}

.page-faq .faq-lede__stats .muted {
  font-size: 0.84rem;
}

/* ---------- 主分栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 48px;
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 左侧问题目录 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-900);
  padding: 22px 18px;
}

@media (min-width: 960px) {
  .page-faq .faq-index {
    position: sticky;
    top: 88px;
    max-height: calc(100vh - 128px);
    overflow-y: auto;
  }
}

.page-faq .faq-index__title {
  margin: 0 0 16px;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

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

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 12px;
  align-items: baseline;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  color: var(--paper);
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.page-faq .faq-index__list a:hover {
  background: var(--ink-800);
  border-color: var(--green);
  transform: translateY(-2px);
}

.page-faq .faq-index__num {
  grid-row: span 2;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--green);
  text-align: left;
  padding-top: 2px;
}

.page-faq .faq-index__label {
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-faq .faq-index__desc {
  grid-column: 2;
  font-size: 0.76rem;
  line-height: 1.5;
}

.page-faq .faq-index__panel {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  padding-inline: 12px;
}

.page-faq .faq-index__panel-title {
  margin: 0 0 8px;
  font-size: 0.88rem;
  font-weight: 700;
}

.page-faq .faq-index__panel p {
  margin: 0 0 12px;
  font-size: 0.8rem;
  line-height: 1.65;
}

.page-faq .faq-index__panel-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 右侧答案区 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  min-width: 0;
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    --faq-gap: 92px;
  }
}

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

.page-faq .faq-group__head {
  max-width: 62ch;
}

.page-faq .faq-group__head .section__title {
  margin: 10px 0 12px;
}

.page-faq .faq-group__head .section__lead {
  margin: 0;
}

.page-faq .faq-trend {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin: 22px 0 4px;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 26px 0 4px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--ink-900);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 18px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-faq .faq-figure--device {
  background:
    radial-gradient(120% 80% at 80% 0%, rgba(77, 163, 255, 0.14), rgba(10, 13, 16, 0) 62%),
    var(--ink-900);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-900);
  overflow: hidden;
  scroll-margin-top: 104px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.page-faq .faq-item:hover {
  border-color: #3a505c;
}

.page-faq .faq-item[open] {
  border-color: rgba(61, 255, 136, 0.42);
  box-shadow: var(--shadow-lift);
  background:
    linear-gradient(180deg, rgba(61, 255, 136, 0.07) 0%, rgba(61, 255, 136, 0) 46%),
    var(--ink-900);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 18px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__idx {
  width: 24px;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--green);
  text-align: left;
}

.page-faq .faq-item__mark {
  position: relative;
  width: 26px;
  height: 26px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--mist);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: background-color 160ms ease, transform 200ms ease, opacity 200ms ease;
}

.page-faq .faq-item__mark::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .faq-item:hover .faq-item__mark {
  border-color: var(--green);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--green);
  background: rgba(61, 255, 136, 0.12);
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--green);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 18px 20px 18px;
}

@media (min-width: 640px) {
  .page-faq .faq-item__q {
    padding: 20px 22px;
  }

  .page-faq .faq-item__a {
    padding: 0 22px 24px 60px;
  }
}

.page-faq .faq-item__scope {
  margin: 0 0 12px;
  padding-left: 10px;
  border-left: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--faint);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 64ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--mist);
}

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

/* ---------- 页尾补充 ---------- */
.page-faq .faq-tail {
  margin-top: 88px;
  padding: 32px 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(90% 120% at 12% 0%, rgba(61, 255, 136, 0.1), rgba(10, 13, 16, 0) 64%),
    var(--ink-900);
}

.page-faq .faq-tail .section__title {
  margin: 0 0 10px;
  font-size: clamp(1.25rem, 2vw, 1.65rem);
}

.page-faq .faq-tail .section__lead {
  margin: 0 0 20px;
  max-width: 58ch;
}

.page-faq .faq-tail__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

@media (max-width: 479px) {
  .page-faq .faq-lede__stats {
    gap: 10px 22px;
  }

  .page-faq .faq-lede__stats .data-num {
    font-size: 1.45rem;
  }

  .page-faq .faq-item__q {
    gap: 10px;
    font-size: 0.95rem;
  }

  .page-faq .faq-tail {
    margin-top: 64px;
    padding: 24px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .faq-item,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after {
    transition: none;
  }

  .page-faq .faq-index__list a:hover {
    transform: none;
  }
}