.page-faq {
  --faq-rule: rgba(11, 31, 58, .16);
  --faq-rule-soft: rgba(11, 31, 58, .08);
  --faq-muted: #4E6280;
  background: var(--paper);
  color: var(--ink);
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq {
    scroll-behavior: smooth;
  }
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-faq .faq-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 72px);
  line-height: 1.03;
  letter-spacing: -.02em;
  color: var(--deep-sea);
  margin: 10px 0 18px;
  max-width: 18ch;
}

.page-faq .faq-lede {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  max-width: 60ch;
  margin: 0;
  color: var(--ink);
}

.page-faq .faq-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-faq .faq-quick a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  text-decoration: none;
  color: var(--deep-sea);
  border: 1px solid var(--faq-rule);
  padding: 7px 12px;
  background: transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-faq .faq-quick a:hover,
.page-faq .faq-quick a:focus-visible {
  color: var(--data-white);
  background: var(--flame);
  border-color: var(--flame);
}

.page-faq .faq-quick a:focus-visible {
  outline: 2px solid var(--flame);
  outline-offset: 2px;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 30px;
  padding: 32px 0 48px;
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 56px;
    padding: 46px 0 64px;
  }
}

/* ---------- 侧边阶段导航 ---------- */
.page-faq .faq-rail__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--flame);
  margin: 0 0 10px;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  text-decoration: none;
  font-size: 14px;
  color: var(--faq-muted);
  border-bottom: 2px solid transparent;
  padding: 6px 2px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--relay-blue);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--deep-sea);
  border-bottom-color: var(--flame);
}

.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--flame);
  outline-offset: 3px;
}

@media (min-width: 900px) {
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    padding: 9px 0;
    border-bottom: 1px solid var(--faq-rule-soft);
    width: 100%;
    justify-content: flex-start;
  }
}

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

.page-faq .faq-sec {
  padding-top: 24px;
  border-top: 1px solid var(--faq-rule);
  margin-bottom: 52px;
}

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

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 8px;
}

.page-faq .faq-sec__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--flame);
  flex: 0 0 auto;
}

.page-faq .faq-sec__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4vw, 38px);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--deep-sea);
  margin: 0;
}

.page-faq .faq-sec__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--faq-muted);
  margin: 0 0 14px 27px;
  max-width: 56ch;
}

.page-faq .faq-sec__note a {
  color: var(--relay-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-sec__note a:hover,
.page-faq .faq-sec__note a:focus-visible {
  color: var(--flame);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  transition: background-color .16s var(--ease);
}

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

.page-faq .faq-item summary::before {
  content: "";
  flex: 0 0 3px;
  align-self: stretch;
  min-height: 22px;
  background: var(--flame);
  opacity: 0;
  transition: opacity .18s var(--ease);
}

.page-faq .faq-item[open] summary::before {
  opacity: 1;
}

.page-faq .faq-item summary:hover .faq-q,
.page-faq .faq-item summary:focus-visible .faq-q {
  color: var(--flame);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--flame);
  outline-offset: -2px;
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--relay-blue);
  padding-top: 6px;
  flex: 0 0 auto;
}

.page-faq .faq-q {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--deep-sea);
  margin: 0;
  flex: 1 1 auto;
  transition: color .16s var(--ease);
}

@media (min-width: 700px) {
  .page-faq .faq-q {
    font-size: 21px;
  }
}

.page-faq .faq-a {
  padding: 0 0 22px 27px;
}

.page-faq .faq-a p {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  max-width: 66ch;
  margin: 0 0 12px;
}

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

.page-faq .faq-a a {
  color: var(--relay-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 步骤清单 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  max-width: 66ch;
}

.page-faq .faq-steps li {
  display: flex;
  gap: 12px;
  padding: 11px 0;
  font-size: 15px;
  line-height: 1.72;
  border-top: 1px solid var(--faq-rule-soft);
}

.page-faq .faq-steps li:first-child {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--relay-blue);
  flex: 0 0 20px;
  padding-top: 2px;
  transition: color .15s var(--ease);
}

.page-faq .faq-steps li:hover .faq-step__num {
  color: var(--flame);
}

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 24px;
  margin-top: 6px;
}

@media (min-width: 1000px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 38px;
    align-items: start;
  }
}

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-rule);
}

.page-faq .faq-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--faq-muted);
  padding-top: 9px;
  margin-top: 10px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-figure--sync {
  margin-top: 10px;
}

.page-faq .faq-figure--export {
  margin-top: 24px;
}

/* ---------- 页尾支持块 ---------- */
.page-faq .faq-cta {
  background: var(--deep-sea);
  color: var(--paper);
  padding: 34px 22px 30px;
  margin-bottom: 56px;
  border-top: 3px solid var(--flame);
}

@media (min-width: 700px) {
  .page-faq .faq-cta {
    padding: 46px 40px 40px;
  }
}

.page-faq .faq-cta .eyebrow--light {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--flame-soft);
  margin: 0 0 12px;
}

.page-faq .faq-cta__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.6vw, 44px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paper);
  margin: 0 0 14px;
  max-width: 22ch;
}

.page-faq .faq-cta__text {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--mist);
  max-width: 62ch;
  margin: 0;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-cta__meta {
  display: grid;
  gap: 16px;
  margin: 32px 0 0;
  padding-top: 24px;
  border-top: 1px solid rgba(169, 184, 203, .3);
}

@media (min-width: 760px) {
  .page-faq .faq-cta__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }
}

.page-faq .faq-cta__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--flame-soft);
  margin-bottom: 6px;
}

.page-faq .faq-cta__meta dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-cta__meta dd.num {
  font-family: var(--font-mono);
}

/* ---------- 进入视口的轻渐入 ---------- */
.page-faq [data-reveal] {
  opacity: 1;
}

.page-faq.js [data-reveal] {
  opacity: 0;
  transition: opacity .16s var(--ease);
}

.page-faq.js [data-reveal].is-visible {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq.js [data-reveal] {
    opacity: 1;
    transition: none;
  }

  .page-faq .faq-item summary::before,
  .page-faq .faq-step__num,
  .page-faq .faq-q {
    transition: none;
  }
}
</final>