.page-faq {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-faq .crumbs {
  padding-top: clamp(14px, 2.4vw, 22px);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t), border-color var(--t);
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .crumbs span[aria-hidden] {
  margin: 0 6px;
  color: var(--rule);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  margin-top: clamp(16px, 2.6vw, 26px);
  padding: clamp(30px, 5.4vw, 60px) 0 clamp(26px, 4.4vw, 48px);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(56, 242, 208, 0.14) 0%, rgba(56, 242, 208, 0) 58%),
    linear-gradient(180deg, var(--grass) 0%, var(--ink) 92%);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-hero__in {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(28px, 6.2vw, 50px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.02em;
  max-width: 20em;
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-faq .faq-metric {
  background: var(--ink);
  padding: 16px 14px 18px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-faq .faq-metric__v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4.4vw, 36px);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 8px;
  justify-self: start;
  min-width: 2.4em;
}

.page-faq .faq-metric__l {
  font-size: 12.5px;
  line-height: 1.55;
  letter-spacing: 0.04em;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__in {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }

  .page-faq .faq-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 索引 + 答案 ---------- */
.page-faq .faq-shell {
  padding-top: clamp(28px, 5vw, 56px);
}

.page-faq .faq-index {
  border-top: 1px solid var(--rule);
  padding-top: 18px;
}

.page-faq .faq-index .eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq .faq-index__toc {
  display: flex;
  flex-direction: column;
  border-left: 2px solid var(--rule);
}

.page-faq .faq-index__toc a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 10px 4px 10px 14px;
  margin-left: -2px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t), border-color var(--t), background var(--t);
}

.page-faq .faq-index__toc a:hover,
.page-faq .faq-index__toc a:focus-visible {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(56, 242, 208, 0.06);
}

.page-faq .faq-index__toc a[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--orange);
}

.page-faq .faq-idx {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-index__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: border-color var(--t), color var(--t);
}

.page-faq .faq-index__foot a:hover,
.page-faq .faq-index__foot a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-answers {
  margin-top: clamp(30px, 5vw, 48px);
}

.page-faq .faq-sec {
  padding-bottom: clamp(26px, 4vw, 42px);
  margin-bottom: clamp(26px, 4vw, 42px);
  border-bottom: 1px solid var(--rule);
  scroll-margin-top: calc(var(--head-h) + 20px);
}

.page-faq .faq-sec:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-faq .faq-sec__head h2 {
  margin: 0;
  font-size: clamp(21px, 3.6vw, 30px);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.015em;
}

.page-faq .faq-sec__head .faq-idx {
  border-bottom: 2px solid var(--gold);
  padding-bottom: 2px;
}

.page-faq .faq-sec__lede {
  margin: 12px 0 20px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .fold {
  background: var(--graphite);
  border: 1px solid var(--rule);
  transition: background var(--t), border-color var(--t);
}

.page-faq .fold + .fold {
  margin-top: 8px;
}

.page-faq .fold summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 12px;
  gap: 14px;
  align-items: center;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
  transition: background var(--t), color var(--t);
}

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

.page-faq .fold summary::after {
  content: "";
  width: 12px;
  height: 12px;
  border: 1px solid var(--cyan);
  background: transparent;
  transition: background var(--t), border-color var(--t);
}

.page-faq .fold summary:hover,
.page-faq .fold summary:focus-visible {
  background: var(--grass-2);
  color: var(--cyan);
}

.page-faq .fold[open] {
  background: var(--grass);
  border-color: var(--rule);
}

.page-faq .fold[open] summary::after {
  background: var(--cyan);
}

.page-faq .fold[open] summary {
  color: var(--cyan);
}

.page-faq .fold__body {
  padding: 0 16px 16px;
}

.page-faq .fold__body p {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  border-top: 1px solid var(--rule);
  padding-top: 14px;
}

.page-faq .fold__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: border-color var(--t);
}

.page-faq .fold__body a:hover,
.page-faq .fold__body a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 4px 0 20px;
  max-width: 360px;
}

.page-faq .faq-figure--wide {
  max-width: 520px;
}

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

.page-faq .faq-figure .media__cap {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 反馈步骤 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 1px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-faq .faq-steps li {
  background: var(--ink);
  padding: 16px 16px 18px;
  display: grid;
  gap: 6px;
  align-content: start;
  transition: background var(--t);
}

.page-faq .faq-steps li:hover {
  background: var(--grass-2);
}

.page-faq .faq-steps__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-steps__t {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-steps__d {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 640px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 桌面分栏 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: 252px minmax(0, 1fr);
    gap: clamp(32px, 4.6vw, 68px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--head-h) + 22px);
    border-top: 0;
    padding-top: 4px;
  }

  .page-faq .faq-answers {
    margin-top: 0;
  }

  .page-faq .faq-figure {
    float: right;
    margin: 0 0 18px 28px;
  }

  .page-faq .faq-sec::after {
    content: "";
    display: block;
    clear: both;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fold,
  .page-faq .fold summary,
  .page-faq .fold summary::after,
  .page-faq .faq-index__toc a,
  .page-faq .faq-steps li {
    transition: none;
  }
}