.page-faq {
  --faq-side: 252px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 30px 0 36px;
  background:
    radial-gradient(130% 100% at 88% -12%, rgba(46, 111, 82, 0.62), rgba(11, 46, 35, 0) 62%),
    var(--pitch-deep);
  border-bottom: 1px solid var(--line-green);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -96px;
  bottom: -160px;
  width: 340px;
  height: 340px;
  border: 1px solid var(--line-green);
  border-radius: 50%;
  opacity: 0.7;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 18em;
  font-family: var(--font-display);
  font-size: clamp(28px, 6.4vw, 54px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--board-blue);
}

.page-faq .faq-hero .stat-strip {
  margin-top: 26px;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-top: 28px;
  padding-bottom: 48px;
}

/* ---------- 主题目录 ---------- */
.page-faq .faq-toc {
  padding-left: 14px;
  border-left: 2px solid var(--line-green);
}

.page-faq .faq-toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--board-blue);
}

.page-faq .faq-toc ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc a {
  display: block;
  padding: 4px 0;
  font-size: 15px;
  color: var(--board-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--card-yellow);
  border-bottom-color: var(--card-yellow);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: 38px;
  scroll-margin-top: calc(var(--topbar-h) + 20px);
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 26px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-green);
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--card-yellow);
}

.page-faq .faq-group__head h2 {
  margin: 0;
}

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  background: var(--pitch-mid);
  border: 1px solid var(--line-green);
  border-radius: var(--radius-md);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .faq-item:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-item[open] {
  border-color: var(--card-yellow);
}

.page-faq .faq-item--paper {
  background: var(--paper);
  border-color: var(--grid-grey);
}

.page-faq .faq-item--paper[open] {
  border-color: var(--card-yellow);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item--paper > summary {
  color: var(--ink);
}

.page-faq .faq-q-mark {
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border: 1px solid var(--card-yellow);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 20px;
  text-align: center;
  color: var(--card-yellow);
  transition: transform var(--t-mid) var(--ease);
}

.page-faq .faq-item[open] .faq-q-mark {
  transform: rotate(45deg);
}

/* ---------- 答案 ---------- */
.page-faq .faq-a {
  padding: 0 18px 18px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--board-blue);
}

.page-faq .faq-item--paper .faq-a {
  color: #35433d;
}

.page-faq .faq-a a {
  color: var(--card-yellow);
  text-decoration: none;
  border-bottom: 1px solid var(--line-green);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-item--paper .faq-a a {
  color: var(--pitch-mid);
  border-bottom-color: var(--line-green);
}

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

/* ---------- 编号步骤 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 10px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 14px;
  background: rgba(11, 46, 35, 0.06);
  border: 1px solid var(--grid-grey);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-steps__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--card-red);
}

/* ---------- 浅底窄注释 ---------- */
.page-faq .faq-note {
  margin: 16px 0 0;
  padding: 14px 18px;
  background: var(--pitch-soft);
  border-left: 3px solid var(--card-yellow);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-note__label {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--pitch-mid);
}

/* ---------- 示意图 ---------- */
.page-faq .faq-figure {
  margin: 16px 0 0;
}

.page-faq .faq-figure .image-frame {
  margin: 0;
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--board-blue);
}

.page-faq .faq-item--paper .faq-figure figcaption {
  color: #55635c;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  padding-top: 26px;
  border-top: 1px solid var(--line-green);
}

.page-faq .faq-cta__text {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--board-blue);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .to-top {
  display: inline-block;
  margin-top: 20px;
  font-size: 13px;
  color: var(--board-blue);
  text-decoration: none;
  border-bottom: 1px solid var(--line-green);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .to-top:hover,
.page-faq .to-top:focus-visible {
  color: var(--card-yellow);
  border-bottom-color: var(--card-yellow);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 40px 0 46px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: 48px;
    padding-top: 44px;
    padding-bottom: 76px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
    padding-left: 18px;
  }

  .page-faq .faq-toc ul {
    display: block;
  }

  .page-faq .faq-toc a {
    padding: 7px 0;
  }

  .page-faq .faq-item > summary {
    padding: 18px 22px;
    font-size: 17px;
  }

  .page-faq .faq-a {
    max-width: 40em;
    padding: 0 22px 20px 22px;
  }

  .page-faq .faq-note {
    max-width: 40em;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-side: 268px;
  }

  .page-faq .faq-body {
    gap: 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-q-mark,
  .page-faq .faq-toc a,
  .page-faq .faq-a a,
  .page-faq .to-top {
    transition: none;
  }
}
<<<END>>>