.page-faq {
  --faq-body-text: #C6CEE3;
  --faq-line-soft: 1px solid rgba(124, 137, 173, 0.18);
  --faq-line-mid: 1px solid rgba(124, 137, 173, 0.30);
  --faq-pad: 18px;
  background: var(--ink-night);
  color: var(--white);
  padding: 34px 0 88px;
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .breadcrumb {
  margin-bottom: 30px;
}

/* ---------- 首屏拼贴 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-bottom: 40px;
  border-bottom: var(--faq-line-mid);
}

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

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 20em;
}

.page-faq .faq-hero .lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-body-text);
}

.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  background: rgba(124, 137, 173, 0.22);
  border: var(--faq-line-mid);
}

.page-faq .faq-metric {
  margin: 0;
  padding: 12px 14px 14px;
  background: var(--ink-night);
}

.page-faq .faq-metric dt {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-metric dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-faq .faq-metric__v {
  font-family: var(--font-mono);
  font-size: 24px;
  letter-spacing: 0.08em;
  color: var(--gold);
  line-height: 1;
}

.page-faq .faq-metric__u {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: var(--faq-line-mid);
  background: var(--ink-slate);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.9;
}

.page-faq .faq-hero__figure figcaption {
  padding: 10px 12px;
  border-top: var(--faq-line-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  margin-top: 40px;
}

/* 左侧索引轨 */
.page-faq .faq-toc {
  min-width: 0;
  border-top: var(--faq-line-mid);
  padding-top: 16px;
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-toc__item + .faq-toc__item {
  border-top: var(--faq-line-soft);
}

.page-faq .faq-toc__link {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 10px;
  padding: 11px 4px 10px 0;
  text-decoration: none;
  color: var(--faq-body-text);
  font-size: 14px;
  line-height: 1.5;
  transition: color 160ms var(--ease);
}

.page-faq .faq-toc__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 160ms var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--gold);
}

.page-faq .faq-toc__link:hover::after,
.page-faq .faq-toc__link:focus-visible::after {
  width: 100%;
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  transition: color 160ms var(--ease);
}

.page-faq .faq-toc__link:hover .faq-toc__num,
.page-faq .faq-toc__link:focus-visible .faq-toc__num {
  color: var(--gold);
}

.page-faq .faq-toc__count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .faq-toc__note {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

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

.page-faq .faq-group + .faq-group {
  margin-top: 54px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: 14px;
  row-gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(232, 184, 92, 0.42);
}

.page-faq .faq-group__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -0.005em;
  color: var(--white);
}

.page-faq .faq-group__desc {
  grid-column: 1 / -1;
  margin: 0;
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-list {
  margin-top: 2px;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border-bottom: var(--faq-line-soft);
  border-left: 2px solid transparent;
  padding-left: 12px;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-item:hover {
  border-left-color: rgba(79, 227, 209, 0.42);
  background: rgba(18, 24, 43, 0.55);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  background: rgba(18, 24, 43, 0.78);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 16px 6px;
  cursor: pointer;
  list-style: none;
  transition: color 160ms var(--ease);
}

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

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

.page-faq .faq-item__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  transition: color 160ms var(--ease);
}

.page-faq .faq-item:hover .faq-item__code,
.page-faq .faq-item[open] .faq-item__code {
  color: var(--cyan);
}

.page-faq .faq-item__text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--white);
}

.page-faq .faq-item__sign {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--mist);
  transition: color 160ms var(--ease);
}

.page-faq .faq-item__sign::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__sign::before {
  content: "–";
}

.page-faq .faq-item:hover .faq-item__sign,
.page-faq .faq-item[open] .faq-item__sign {
  color: var(--gold);
}

.page-faq .faq-item__a {
  padding: 0 6px 20px;
  border-top: var(--faq-line-soft);
  margin-top: -1px;
  padding-top: 14px;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--faq-body-text);
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  padding-bottom: 1px;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 160ms var(--ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  background-size: 100% 1px;
}

/* 步骤列表 */
.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 4px 0 12px;
  padding: 0;
  max-width: 38em;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  border-top: var(--faq-line-soft);
  font-size: 14px;
  line-height: 1.72;
  color: var(--faq-body-text);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

/* 口径小表 */
.page-faq .faq-table-wrap {
  margin: 6px 0 4px;
  overflow-x: auto;
  border: var(--faq-line-soft);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
  font-size: 13px;
}

.page-faq .faq-table caption {
  padding: 10px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
  border-bottom: var(--faq-line-soft);
}

.page-faq .faq-table th {
  padding: 9px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--mist);
  white-space: nowrap;
  border-bottom: var(--faq-line-mid);
}

.page-faq .faq-table td {
  padding: 10px 12px;
  vertical-align: top;
  line-height: 1.7;
  color: var(--faq-body-text);
  border-bottom: var(--faq-line-soft);
}

.page-faq .faq-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-table tbody tr:hover td {
  border-bottom-color: rgba(79, 227, 209, 0.5);
}

.page-faq .faq-table td:first-child {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--white);
  white-space: nowrap;
}

/* 章节配图 */
.page-faq .faq-figure {
  margin: 22px 0 0;
  border: var(--faq-line-mid);
  background: var(--ink-slate);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 22 / 15;
  object-fit: cover;
  opacity: 0.88;
}

.page-faq .faq-figure figcaption {
  padding: 10px 12px;
  border-top: var(--faq-line-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.65;
  color: var(--mist);
}

/* 结尾提示 */
.page-faq .faq-outro {
  margin-top: 54px;
  padding: 18px 18px 20px;
  border: var(--faq-line-mid);
  border-left: 2px solid var(--cyan);
  background: var(--ink-slate);
}

.page-faq .faq-outro__k {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-faq .faq-outro__v {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--faq-body-text);
}

.page-faq .faq-outro__mail {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--white);
  word-break: break-all;
}

.page-faq .faq-outro a {
  color: var(--cyan);
  text-decoration: none;
  padding-bottom: 1px;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 160ms var(--ease);
}

.page-faq .faq-outro a:hover,
.page-faq .faq-outro a:focus-visible {
  background-size: 100% 1px;
}

/* ---------- 平板以上 ---------- */
@media (min-width: 720px) {
  .page-faq {
    --faq-pad: 22px;
    padding-top: 44px;
  }

  .page-faq .faq-hero h1 {
    font-size: 34px;
  }

  .page-faq .faq-hero .lede {
    font-size: 16px;
  }

  .page-faq .faq-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-group__title {
    font-size: 23px;
  }

  .page-faq .faq-item__text {
    font-size: 16px;
  }

  .page-faq .faq-item__q {
    padding: 18px 8px;
  }

  .page-faq .faq-item {
    padding-left: 16px;
  }

  .page-faq .faq-item__a {
    padding: 16px 8px 22px;
  }
}

/* ---------- 桌面：首屏拼贴 + 左侧索引轨 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
    padding-bottom: 46px;
  }

  .page-faq .faq-hero h1 {
    font-size: 40px;
    max-width: 16em;
  }

  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 46px;
    margin-top: 46px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    border-top: 0;
    padding-top: 0;
    border-left: var(--faq-line-mid);
    padding-left: 16px;
  }

  .page-faq .faq-group__head {
    column-gap: 18px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 64px;
  }

  .page-faq .faq-hero h1 {
    font-size: 46px;
  }

  .page-faq .faq-item__a p {
    font-size: 15px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-toc__link::after,
  .page-faq .faq-toc__num,
  .page-faq .faq-item,
  .page-faq .faq-item__code,
  .page-faq .faq-item__sign,
  .page-faq .faq-item__a a,
  .page-faq .faq-outro a {
    transition: none;
  }

  .page-faq .faq-toc__link:hover::after,
  .page-faq .faq-toc__link:focus-visible::after {
    width: 0;
  }
}