/* ===== 使用指南 / page-faq ===== */
.page-faq{
  --faq-w: 68ch;
  --faq-rule: rgba(180,116,75,.24);
  --faq-answer: rgba(232,237,230,.82);
  --faq-rail: rgba(159,184,172,.28);
  background: var(--ink);
  color: var(--bone);
  padding-bottom: var(--block-gap);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb{ margin-top: 22px; }

/* ---------- 首屏：主题声明 + 折叠示意 ---------- */
.page-faq .faq-hero{
  display: grid;
  gap: 30px;
  margin-top: 24px;
}
.page-faq .faq-kicker{
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}
.page-faq .display{
  margin: 0 0 18px;
  color: var(--bone);
}
.page-faq .lede{
  max-width: 54ch;
  margin: 0;
  color: rgba(232,237,230,.8);
}
.page-faq .stat-row{
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line-cyan);
}
.page-faq .stat{
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.page-faq .stat-value{
  font-size: 22px;
  line-height: 1.1;
  color: var(--amber);
}
.page-faq .stat-label{
  font-size: 13px;
  color: var(--stone);
}

.page-faq .faq-hero-media{
  position: relative;
  margin: 0;
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
}
.page-faq .faq-hero-media img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-hero-media .media-cap{
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 22px 16px 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
  background: linear-gradient(to top, rgba(7,20,16,.92), rgba(7,20,16,0));
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-index{
  display: flex;
  gap: 10px;
  overflow-x: auto;
  margin-top: 46px;
  padding: 4px 0 14px;
  border-bottom: 1px solid var(--line-mist);
  scrollbar-width: none;
  scroll-snap-type: x proximity;
}
.page-faq .faq-index::-webkit-scrollbar{ display: none; }
.page-faq .faq-index-link{
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: 7px 15px;
  border: 1px solid var(--line-mist);
  border-radius: var(--pill);
  font-size: 13px;
  white-space: nowrap;
  color: var(--mist);
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}
.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible{
  color: var(--cyan);
  border-color: var(--line-cyan);
  background: rgba(53,242,200,.06);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group{
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: 96px;
}
.page-faq .faq-ghead{
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 8px;
}
.page-faq .faq-gnum{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--clay);
}
.page-faq .faq-gtitle{
  margin: 0;
  font-family: var(--font-cond);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--bone);
}
.page-faq .faq-gnote{
  max-width: 58ch;
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item{
  border-left: 2px solid var(--faq-rail);
  padding-left: 14px;
  transition: border-color .18s ease;
}
.page-faq .faq-item + .faq-item{ margin-top: 2px; }
.page-faq .faq-item[open]{ border-left-color: var(--cyan); }

.page-faq .faq-q{
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 6px 14px 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--bone);
  cursor: pointer;
  list-style: none;
  border-radius: 8px;
}
.page-faq .faq-q::-webkit-details-marker{ display: none; }
.page-faq .faq-q::marker{ content: ""; }
.page-faq .faq-q:focus-visible{
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}
.page-faq .faq-no{
  flex: 0 0 22px;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
  transition: color .18s ease;
}
.page-faq .faq-item[open] .faq-no{ color: var(--cyan); }
.page-faq .faq-text{
  flex: 1 1 auto;
  min-width: 0;
  transition: color .18s ease;
}
.page-faq .faq-q:hover .faq-text{ color: var(--cyan); }

.page-faq .faq-mark{
  position: relative;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  margin-top: 8px;
  margin-left: auto;
}
.page-faq .faq-mark::before,
.page-faq .faq-mark::after{
  content: "";
  position: absolute;
  background: var(--stone);
  transition: background-color .18s ease, transform .18s ease;
}
.page-faq .faq-mark::before{ left: 0; top: 5.5px; width: 12px; height: 1.5px; }
.page-faq .faq-mark::after{ left: 5.5px; top: 0; width: 1.5px; height: 12px; }
.page-faq .faq-item[open] .faq-mark::before{ background: var(--cyan); }
.page-faq .faq-item[open] .faq-mark::after{ transform: scaleY(0); }

.page-faq .faq-a{
  max-width: var(--faq-w);
  padding: 0 6px 22px 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-answer);
}
.page-faq .faq-a p{ margin: 0; }
.page-faq .faq-a p + p{ margin-top: 10px; }
.page-faq .faq-a a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}
.page-faq .faq-a a:hover{ border-bottom-color: var(--cyan); }

.page-faq .faq-ref{
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--amber);
  border-bottom: 1px dashed rgba(232,176,75,.45);
  white-space: nowrap;
  cursor: help;
}

.page-faq .faq-meta{
  display: flex;
  justify-content: flex-end;
  margin-top: 14px;
}
.page-faq .faq-ver{
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--line-mist);
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 流程示意 ---------- */
.page-faq .faq-figure{
  margin: 56px 0 0;
  border: 1px solid var(--line-mist);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
}
.page-faq .faq-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure .media-cap{
  display: block;
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line-mist);
}

/* ---------- 尾部 ---------- */
.page-faq .faq-tail{
  display: grid;
  gap: 22px;
  margin-top: 72px;
  padding-top: 30px;
  border-top: 1px solid var(--line-cyan);
}
.page-faq .faq-tail-title{
  margin: 0 0 12px;
  font-family: var(--font-cond);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--bone);
}
.page-faq .faq-tail-copy p{
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(232,237,230,.82);
}
.page-faq .faq-tail-copy .note{
  margin-top: 14px;
  font-size: 14px;
  color: var(--mist);
}
.page-faq .faq-tail-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 展开动效 ---------- */
.page-faq .faq-item[open] .faq-a{
  animation: faq-reveal .18s ease-out;
}
@keyframes faq-reveal{
  from{ opacity: 0; transform: translateY(-4px); }
  to{ opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce){
  .page-faq .faq-item[open] .faq-a{ animation: none; }
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px){
  .page-faq .faq-no{ flex-basis: 30px; }
  .page-faq .faq-a{ padding-left: 42px; }
}

@media (min-width: 900px){
  .page-faq .faq-hero{
    grid-template-columns: minmax(0,7fr) minmax(0,5fr);
    align-items: start;
    gap: 56px;
    margin-top: 30px;
  }
  .page-faq .faq-group{
    margin-top: 72px;
    padding-top: 44px;
  }
  .page-faq .faq-tail{
    grid-template-columns: minmax(0,7fr) minmax(0,5fr);
    gap: 48px;
    align-items: start;
  }
  .page-faq .faq-tail-actions{ justify-content: flex-end; }
}
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