.page-faq{
  --faq-line:rgba(36,28,22,.26);
  --faq-line-soft:rgba(36,28,22,.14);
  --faq-warm:rgba(255,209,102,.55);
  padding-bottom:clamp(48px,7vw,90px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:26px;
  padding-top:clamp(18px,3vw,34px);
  padding-bottom:clamp(30px,5vw,52px);
}

.page-faq .faq-hero__main h1{
  margin:14px 0 0;
  font-size:clamp(26px,5.2vw,46px);
  line-height:1.22;
  letter-spacing:-.02em;
  font-weight:800;
  color:var(--paper);
  max-width:20em;
}

.page-faq .faq-hero__main .lede{
  margin-top:18px;
  max-width:38em;
  font-size:15px;
  line-height:1.8;
  color:var(--txt-body);
}

.page-faq .faq-hero__hint{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  line-height:1.7;
  color:var(--sage);
}

.page-faq .faq-hero__panel{
  position:relative;
  padding:22px 20px 18px;
  border:1px solid var(--line-cyan);
  border-radius:var(--radius-card);
  background:
    repeating-linear-gradient(0deg, rgba(110,139,127,.13) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(110,139,127,.13) 0 1px, transparent 1px 24px),
    linear-gradient(180deg, rgba(79,227,193,.06), rgba(79,227,193,0) 60%),
    var(--ink-2);
  box-shadow:var(--shadow-panel);
}

.page-faq .faq-facts{
  margin:18px 0 0;
  padding:0;
  list-style:none;
  display:grid;
  gap:2px;
}

.page-faq .faq-facts__item{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding:12px 0 12px 14px;
  border-left:2px solid rgba(79,227,193,.45);
  border-bottom:1px solid var(--line-soft);
}

.page-faq .faq-facts__item:last-child{
  border-bottom:0;
  padding-bottom:2px;
}

.page-faq .faq-facts__v{
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  color:var(--cyan);
  letter-spacing:.01em;
  line-height:1.2;
}

.page-faq .faq-facts__l{
  font-size:12.5px;
  line-height:1.6;
  color:var(--txt-dim);
}

/* ---------- 主体分屏 ---------- */
.page-faq .faq-shell{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:28px;
  align-items:start;
}

.page-faq .faq-rail .rail__list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:10px;
}

.page-faq .faq-rail .rail__link{
  display:inline-block;
  padding:6px 12px;
  border:1px solid var(--line-soft);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--txt-dim);
  text-decoration:none;
  transition:color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-rail .rail__link:hover{
  color:var(--cyan);
  border-color:var(--line-cyan);
}

.page-faq .faq-rail .rail__link.is-active{
  color:var(--cyan);
  border-color:var(--cyan);
  background:rgba(79,227,193,.08);
}

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

/* ---------- 章节 ---------- */
.page-faq .faq-sec{
  margin-bottom:clamp(34px,5vw,54px);
  scroll-margin-top:120px;
}

.page-faq .faq-sec__head{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line-soft);
}

.page-faq .faq-sec__num{
  font-family:var(--font-mono);
  font-size:clamp(22px,3.4vw,28px);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
  color:var(--cyan);
  line-height:1;
}

.page-faq .faq-sec__title{
  margin:0;
  font-size:clamp(17px,2.6vw,21px);
  font-weight:800;
  letter-spacing:.01em;
  color:var(--paper);
}

.page-faq .faq-sec__note{
  margin:10px 0 18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--sage);
}

.page-faq .faq-sec__tail{
  margin:16px 0 0;
  font-size:14.5px;
  line-height:1.8;
  color:var(--txt-body);
}

.page-faq .faq-inline{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(79,227,193,.4);
  padding-bottom:1px;
}

.page-faq .faq-inline:hover{
  border-bottom-color:var(--cyan);
}

/* ---------- 问答卡 ---------- */
.page-faq .qa{
  margin-bottom:12px;
  border:1px solid var(--faq-line);
  border-radius:var(--radius-card);
  background:var(--paper);
  color:var(--brown);
  box-shadow:0 1px 0 rgba(36,28,22,.2), 6px 6px 0 -2px rgba(9,33,27,.75);
  overflow:hidden;
  transition:box-shadow .2s ease, transform .2s ease;
}

.page-faq .qa:hover{
  transform:translateY(-2px);
  box-shadow:0 1px 0 rgba(36,28,22,.2), 8px 9px 0 -2px rgba(9,33,27,.8);
}

.page-faq .qa__q{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:15px 16px;
  cursor:pointer;
  list-style:none;
  font-size:15px;
  font-weight:800;
  line-height:1.65;
  color:var(--brown);
}

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

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

.page-faq .qa__idx{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--brown);
  background:var(--faq-warm);
  border-radius:4px;
  padding:2px 6px;
  margin-top:3px;
  line-height:1.5;
}

.page-faq .qa__text{
  flex:1 1 auto;
  min-width:0;
}

.page-faq .qa__icon{
  position:relative;
  flex:0 0 auto;
  width:16px;
  height:16px;
  margin-top:4px;
  color:var(--brown);
}

.page-faq .qa__icon::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:7px;
  height:2px;
  background:currentColor;
  border-radius:2px;
}

.page-faq .qa__icon::after{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  left:7px;
  width:2px;
  background:currentColor;
  border-radius:2px;
  transition:transform .2s ease, opacity .2s ease;
}

.page-faq .qa[open] .qa__icon::after{
  transform:scaleY(0);
  opacity:0;
}

.page-faq .qa__a{
  margin:0 16px 16px;
  padding-top:12px;
  border-top:1px solid var(--faq-line-soft);
  font-size:14.5px;
  line-height:1.8;
  color:var(--brown);
}

.page-faq .qa__a p{
  margin:0;
}

.page-faq .qa[open] .qa__a{
  animation:faqAnswerIn .22s ease-out;
}

@keyframes faqAnswerIn{
  from{
    opacity:0;
    transform:translateY(-4px);
  }
  to{
    opacity:1;
    transform:none;
  }
}

.page-faq .k{
  font-family:var(--font-mono);
  font-style:normal;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  color:var(--brown);
  background:var(--faq-warm);
  border-radius:4px;
  padding:0 4px;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure{
  margin:20px 0 0;
  border:1px solid var(--line-soft);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact{
  margin-bottom:16px;
  padding:20px;
  border:1px solid var(--line-soft);
  border-radius:var(--radius-card);
  background:linear-gradient(180deg, rgba(79,227,193,.05), rgba(79,227,193,0) 55%), var(--ink-2);
  box-shadow:var(--shadow-panel);
}

.page-faq .faq-contact .footer-contact__row{
  display:flex;
  flex-wrap:wrap;
  gap:6px 14px;
  padding:10px 0;
  border-bottom:1px solid var(--line-soft);
}

.page-faq .faq-contact .footer-contact__key{
  flex:0 0 84px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--sage);
}

.page-faq .faq-contact .footer-contact__val{
  flex:1 1 220px;
  min-width:0;
  font-size:14.5px;
  line-height:1.7;
  color:var(--paper);
  word-break:break-word;
}

.page-faq .faq-contact__note{
  margin:14px 0 0;
  font-size:13.5px;
  line-height:1.75;
  color:var(--txt-dim);
}

/* ---------- 结尾提示 ---------- */
.page-faq .copy-hint{
  background:rgba(79,227,193,.06);
  border-radius:var(--radius-sm);
  padding:4px 0;
}

.page-faq .faq-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:20px;
}

/* ---------- 中屏及以上 ---------- */
@media (min-width:760px){
  .page-faq .faq-hero{
    grid-template-columns:minmax(0,1.45fr) minmax(0,.95fr);
    align-items:end;
    gap:44px;
  }

  .page-faq .faq-actions{
    gap:14px;
  }
}

@media (min-width:1000px){
  .page-faq .faq-shell{
    grid-template-columns:280px minmax(0,1fr);
    gap:52px;
  }

  .page-faq .faq-rail{
    position:sticky;
    top:104px;
  }

  .page-faq .faq-rail .rail__list{
    display:block;
    gap:0;
    margin-top:14px;
  }

  .page-faq .faq-rail .rail__link{
    display:block;
    padding:9px 10px;
    border:0;
    border-left:2px solid transparent;
    border-radius:0;
    background:none;
    font-size:12.5px;
  }

  .page-faq .faq-rail .rail__link.is-active{
    background:none;
    border-left-color:var(--cyan);
  }

  .page-faq .qa__q{
    padding:17px 20px;
    font-size:15.5px;
  }

  .page-faq .qa__a{
    margin:0 20px 18px;
    padding-top:14px;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-faq .qa,
  .page-faq .qa__icon::after,
  .page-faq .faq-rail .rail__link{
    transition:none;
  }

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

  .page-faq .qa[open] .qa__a{
    animation:none;
  }
}
<<<END>>>