.page-faq {
  --faq-card-bg: #FFFCF4;
  --faq-rail: 4px;
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(52px, 8vw, 108px) 0 clamp(30px, 4.5vw, 58px);
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: var(--gut);
  bottom: -1px;
  width: clamp(64px, 13vw, 170px);
  height: 2px;
  background: var(--gold);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
}

.page-faq .faq-hero-lead .eyebrow {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--ink-2);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(32px, 6.2vw, 74px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-faq .faq-hero-copy .lede {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-faq .faq-hero-note {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}

@media (min-width: 880px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 6vw, 84px);
  }
}

/* ---------- 骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
  padding-top: clamp(34px, 4.6vw, 62px);
  padding-bottom: var(--space-sec);
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(186px, 0.82fr) minmax(0, 2.6fr);
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--ink-2);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
  padding: 10px 14px 10px 12px;
  border: 1px solid var(--edge);
  border-left: 4px solid var(--acc, var(--edge));
  border-radius: var(--radius-sm);
  background: var(--faq-card-bg);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  opacity: 0.66;
}

.page-faq .faq-index-link--crimson { --acc: var(--crimson); }
.page-faq .faq-index-link--gold { --acc: var(--gold); }
.page-faq .faq-index-link--midnight { --acc: var(--midnight); }
.page-faq .faq-index-link--neon { --acc: var(--neon); }
.page-faq .faq-index-link--green { --acc: var(--green); }
.page-faq .faq-index-link--vermilion { --acc: var(--vermilion); }

.page-faq .faq-index-link:hover {
  border-color: var(--gold);
  transform: translateX(2px);
}

.page-faq .faq-index-link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-faq .faq-index-link[data-active="true"] {
  background: var(--crimson);
  border-color: var(--crimson);
  border-left-color: var(--gold);
  color: var(--paper);
}

.page-faq .faq-index-link[data-active="true"] .faq-index-num {
  opacity: 0.85;
}

@media (min-width: 960px) {
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-index-list {
    display: grid;
    gap: 5px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index-link {
    justify-content: flex-start;
    padding: 11px 14px 11px 12px;
  }
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(44px, 6vw, 82px);
}

.page-faq .faq-group {
  scroll-margin-top: 112px;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--edge);
  margin-bottom: 22px;
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 27px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.page-faq .faq-cards {
  display: grid;
  gap: 12px;
}

/* ---------- 问题卡 ---------- */
.page-faq .qa-card {
  position: relative;
  padding: 20px 20px 20px 24px;
  background: var(--faq-card-bg);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: box-shadow 0.22s ease, border-color 0.22s ease, transform 0.22s ease;
}

.page-faq .qa-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--faq-rail);
  background: var(--acc, var(--crimson));
  transition: width 0.22s ease;
}

.page-faq .qa-card--crimson { --acc: var(--crimson); }
.page-faq .qa-card--gold { --acc: var(--gold); }
.page-faq .qa-card--midnight { --acc: var(--midnight); }
.page-faq .qa-card--neon { --acc: var(--neon); }
.page-faq .qa-card--green { --acc: var(--green); }
.page-faq .qa-card--vermilion { --acc: var(--vermilion); }

.page-faq .qa-card:hover {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: var(--shadow-2);
}

.page-faq .qa-card:hover::before {
  width: calc(var(--faq-rail) + 1px);
}

.page-faq .qa-q {
  margin: 0 0 9px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .qa-a {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-faq .qa-a a {
  color: var(--crimson);
  text-underline-offset: 3px;
}

.page-faq .qa-a a:hover {
  color: var(--vermilion);
}

.page-faq .qa-a a:focus-visible,
.page-faq .qa-fold-body a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

/* ---------- 折叠 ---------- */
.page-faq .qa-fold {
  margin-top: 14px;
  border: 1px dashed var(--edge);
  border-radius: var(--radius-sm);
  background: rgba(217, 210, 194, 0.18);
}

.page-faq .qa-fold > summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  border-radius: var(--radius-sm);
}

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

.page-faq .qa-fold > summary::before {
  content: "";
  flex: none;
  width: 0;
  height: 0;
  border-left: 6px solid var(--gold);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transition: transform 0.22s ease;
}

.page-faq .qa-fold[open] > summary::before {
  transform: rotate(90deg);
}

.page-faq .qa-fold > summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .qa-fold-body {
  margin: 0;
  padding: 0 16px 16px 32px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-faq .qa-fold-body a {
  color: var(--crimson);
  text-underline-offset: 3px;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 18px;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--midnight);
  box-shadow: var(--shadow-1);
}

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

.page-faq .faq-figure--portrait {
  margin: 0;
}

/* ---------- 手机端章节布局 ---------- */
.page-faq .faq-mobile-layout {
  display: grid;
  gap: 18px;
}

@media (min-width: 860px) {
  .page-faq .faq-mobile-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    gap: 24px;
    align-items: start;
  }
}

/* ---------- 深色收束 ---------- */
.page-faq .faq-group--support {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 46px);
  border-radius: var(--radius);
  background: var(--midnight);
  color: var(--paper);
}

.page-faq .faq-group--support::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -90px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(62, 224, 206, 0.24), rgba(62, 224, 206, 0) 66%);
  pointer-events: none;
}

.page-faq .faq-group--support .faq-group-head {
  border-bottom-color: rgba(247, 242, 232, 0.22);
}

.page-faq .faq-group--support .faq-group-num {
  color: var(--neon);
}

.page-faq .faq-group--support h2 {
  color: var(--paper);
}

.page-faq .faq-support-body {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  max-width: 62ch;
}

.page-faq .faq-support-body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(247, 242, 232, 0.82);
}

.page-faq .faq-support-body .btn {
  justify-self: start;
  margin-top: 6px;
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-card,
  .page-faq .qa-card::before,
  .page-faq .qa-fold > summary::before,
  .page-faq .faq-index-link {
    transition: none;
  }

  .page-faq .qa-card:hover {
    transform: none;
  }

  .page-faq .faq-index-link:hover {
    transform: none;
  }
}