.page-faq{
  --faq-surface:#F4F2EA;
  --faq-hair:rgba(182,188,181,.28);
  display:block;
  overflow-x:clip;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs{margin:0;padding:14px 0 0;}
.page-faq .breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0;}
.page-faq .breadcrumbs li{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--concrete);}
.page-faq .breadcrumbs a{color:var(--teal);text-decoration:none;border-bottom:1px solid transparent;}
.page-faq .breadcrumbs a:hover{border-bottom-color:var(--teal);}

/* ---------- 章节节奏 ---------- */
.page-faq .section{padding:clamp(38px,5.5vw,68px) 0;position:relative;}
.page-faq .section--tight{padding:clamp(28px,4vw,46px) 0;}
.page-faq .section--paper{background:var(--paper);color:var(--ink);}
.page-faq .section--deep{background:var(--green-deep);color:var(--paper);}
.page-faq .section--carbon{background:var(--carbon);color:var(--paper);}

.page-faq .section__head{margin-bottom:clamp(20px,3vw,32px);max-width:52ch;}
.page-faq .section__head h2{font-size:clamp(23px,3.4vw,34px);line-height:1.25;letter-spacing:.02em;margin:8px 0 10px;font-weight:800;}
.page-faq .section__head p{font-size:15px;line-height:1.8;margin:0;opacity:.86;}
.page-faq .section--deep .section__head p,
.page-faq .section--carbon .section__head p{color:var(--mist);}
.page-faq .section--paper .section__head p{color:var(--ink);}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero{
  padding:clamp(26px,4.5vw,52px) 0 clamp(34px,6vw,60px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(53,240,208,.16), rgba(11,59,46,0) 58%),
    linear-gradient(180deg,var(--green-deep),var(--green));
  color:var(--paper);
  border-bottom:2px solid var(--carbon);
}
.page-faq .faq-hero__grid{display:grid;gap:clamp(22px,4vw,44px);grid-template-columns:1fr;}
.page-faq .faq-hero h1{
  font-size:clamp(28px,5.2vw,52px);
  line-height:1.16;
  letter-spacing:.02em;
  font-weight:900;
  margin:10px 0 16px;
  max-width:22ch;
}
.page-faq .faq-hero__lead{font-size:15.5px;line-height:1.85;color:var(--mist);max-width:42em;margin:0 0 18px;}
.page-faq .faq-hero__note{font-size:14px;line-height:1.8;color:var(--mist);margin:0;}

.page-faq .faq-hero__panel{
  border:2px solid var(--carbon);
  background:rgba(6,42,33,.86);
  box-shadow:var(--shadow-cyan);
  padding:16px 14px 12px;
}
.page-faq .faq-hero__panel .mono-label{color:var(--concrete);display:block;margin:0 4px 10px;}
.page-faq .faq-hero__panel ol{list-style:none;margin:0;padding:0;}
.page-faq .faq-hero__panel li + li{border-top:1px solid var(--faq-hair);}
.page-faq .faq-hero__panel a{
  display:flex;
  gap:12px;
  align-items:baseline;
  padding:11px 6px;
  color:var(--paper);
  text-decoration:none;
  font-size:15px;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.page-faq .faq-hero__panel a:hover,
.page-faq .faq-hero__panel a:focus-visible{background:rgba(53,240,208,.12);color:var(--cyan);}
.page-faq .index-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--cyan);}

/* ---------- 三步上手 ---------- */
.page-faq .steps{display:grid;gap:var(--gap);grid-template-columns:1fr;}
.page-faq .step{
  border:2px solid var(--carbon);
  background:var(--green);
  color:var(--paper);
  box-shadow:var(--shadow-hard);
  padding:20px 18px 22px;
}
.page-faq .step__num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(28px,4vw,38px);
  line-height:1;
  color:var(--cyan);
  margin-bottom:12px;
  font-variant-numeric:tabular-nums;
}
.page-faq .step h3{font-size:18px;line-height:1.4;margin:0 0 10px;font-weight:800;letter-spacing:.02em;}
.page-faq .step p{margin:0;font-size:14.5px;line-height:1.8;color:var(--mist);}

/* ---------- 筛选示例 ---------- */
.page-faq .filter-mock{
  margin-top:var(--gap);
  border:2px solid var(--carbon);
  background:var(--faq-surface);
  padding:16px 16px 18px;
  box-shadow:6px 6px 0 rgba(16,19,20,.16);
  display:grid;
  gap:12px;
}
.page-faq .filter-mock .mono-label{color:var(--concrete);margin:0 0 2px;display:block;}
.page-faq .filter-mock__row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.page-faq .filter-mock__label{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--concrete);
  min-width:74px;
  flex:0 0 auto;
}
.page-faq .chip{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  padding:5px 10px;
  border:1.5px solid var(--carbon);
  background:var(--paper);
  color:var(--ink);
  white-space:nowrap;
}
.page-faq .chip--on{background:var(--green);color:var(--cyan);}

/* ---------- 图片容器 ---------- */
.page-faq .media{margin:calc(var(--gap) + 8px) 0 0;}
.page-faq .media__img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  border:2px solid var(--carbon);
  background:var(--green-deep);
}
.page-faq .media__caption{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  line-height:1.7;
  color:var(--concrete);
  margin-top:10px;
}

/* ---------- 问答 ---------- */
.page-faq .qa-list{display:grid;gap:12px;}
.page-faq .qa{
  border:2px solid var(--carbon);
  background:var(--green);
  color:var(--paper);
  transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.page-faq .qa[open]{
  box-shadow:inset 6px 0 0 var(--cyan);
  border-color:#0A2C23;
}
.page-faq .qa > summary{
  position:relative;
  cursor:pointer;
  list-style:none;
  padding:16px 50px 16px 18px;
  font-size:15.5px;
  font-weight:700;
  line-height:1.6;
  letter-spacing:.01em;
}
.page-faq .qa > summary::-webkit-details-marker{display:none;}
.page-faq .qa > summary::after{
  content:"";
  position:absolute;
  right:20px;
  top:22px;
  width:10px;
  height:10px;
  border-right:2px solid var(--cyan);
  border-bottom:2px solid var(--cyan);
  transform:rotate(45deg);
  transition:transform .2s var(--ease);
}
.page-faq .qa[open] > summary::after{transform:rotate(-135deg);}
.page-faq .qa > summary:focus-visible{outline:2px solid var(--cyan);outline-offset:-4px;}
.page-faq .qa__body{padding:2px 20px 20px 24px;border-top:1px solid var(--faq-hair);}
.page-faq .qa__body p{margin:14px 0 0;font-size:14.5px;line-height:1.85;color:var(--mist);max-width:44em;}

.page-faq .legend{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  margin-top:clamp(20px,3vw,30px);
  padding-top:16px;
  border-top:1px solid var(--faq-hair);
}
.page-faq .legend__item{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--mist);}
.page-faq .legend__dot{width:12px;height:12px;border-radius:999px;flex:0 0 auto;border:1px solid rgba(16,19,20,.5);}
.page-faq .legend__dot--red{background:var(--red);}
.page-faq .legend__dot--yellow{background:var(--yellow);}
.page-faq .legend__dot--cyan{background:var(--cyan);}
.page-faq .legend__dot--teal{background:var(--teal);}
.page-faq .legend__dot--gray{background:var(--concrete);}

/* ---------- 勘误 ---------- */
.page-faq .errata-grid{display:grid;gap:clamp(24px,4vw,44px);grid-template-columns:1fr;}
.page-faq .errata-main h2{font-size:clamp(22px,3.2vw,32px);line-height:1.28;letter-spacing:.02em;font-weight:800;margin:8px 0 12px;}
.page-faq .errata-main .prose{max-width:42em;line-height:1.85;font-size:15px;margin:0 0 22px;}

.page-faq .flow{list-style:none;margin:0;padding:0;display:grid;gap:14px;}
.page-faq .flow__item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:14px;
  border:2px solid var(--carbon);
  background:#F7F5EF;
  padding:16px 16px 18px;
  box-shadow:5px 5px 0 rgba(16,19,20,.14);
}
.page-faq .flow__num{
  font-family:var(--font-mono);
  font-size:20px;
  line-height:1.2;
  color:var(--teal);
  font-variant-numeric:tabular-nums;
}
.page-faq .flow__item h3{font-size:16px;margin:0 0 8px;font-weight:800;letter-spacing:.02em;}
.page-faq .flow__item p{margin:0;font-size:14.5px;line-height:1.8;color:var(--ink);}
.page-faq .errata-note{
  margin:20px 0 0;
  padding:14px 16px;
  border-left:6px solid var(--yellow);
  background:#F7F5EF;
  font-size:14px;
  line-height:1.8;
  color:var(--ink);
}
.page-faq .errata-figure{margin-top:0;}

/* ---------- 多端同步 ---------- */
.page-faq .sync-grid{display:grid;gap:var(--gap);grid-template-columns:1fr;}
.page-faq .sync-card{
  border:2px solid #23332F;
  background:rgba(11,59,46,.55);
  padding:18px 18px 20px;
  transition:transform .18s var(--ease),border-color .18s var(--ease);
}
.page-faq .sync-card:hover{transform:translateY(-2px);border-color:var(--cyan);}
.page-faq .sync-card .mono-label{display:block;color:var(--cyan);margin:0 0 10px;}
.page-faq .sync-card h3{font-size:17px;margin:0 0 10px;font-weight:800;letter-spacing:.02em;}
.page-faq .sync-card p{margin:0;font-size:14.5px;line-height:1.8;color:var(--mist);}
.page-faq .sync-foot{margin:clamp(20px,3vw,28px) 0 0;font-size:14.5px;line-height:1.8;color:var(--mist);max-width:52em;}

/* ---------- 机构版 ---------- */
.page-faq .org-grid{display:grid;gap:var(--gap);grid-template-columns:1fr;}
.page-faq .org-item{
  border:2px solid var(--carbon);
  background:var(--green);
  padding:20px 18px 22px;
  box-shadow:6px 6px 0 rgba(53,240,208,.28);
}
.page-faq .org-item h3{font-size:17px;line-height:1.45;margin:0 0 10px;font-weight:800;letter-spacing:.02em;}
.page-faq .org-item p{margin:0;font-size:14.5px;line-height:1.85;color:var(--mist);}

/* ---------- 结尾 ---------- */
.page-faq .cta-band{background:var(--paper);color:var(--ink);border-top:2px solid var(--carbon);}
.page-faq .cta-band__inner{
  display:grid;
  gap:20px;
  align-items:center;
  border:2px solid var(--carbon);
  background:linear-gradient(120deg,#F7F5EF 60%,rgba(53,240,208,.22));
  box-shadow:7px 7px 0 var(--carbon);
  padding:clamp(20px,3vw,32px);
}
.page-faq .cta-band__inner h2{font-size:clamp(20px,3vw,28px);line-height:1.3;margin:8px 0 10px;font-weight:800;letter-spacing:.02em;}
.page-faq .cta-band__inner p{margin:0;font-size:14.5px;line-height:1.75;color:var(--ink);}
.page-faq .cta-band__actions{display:flex;flex-wrap:wrap;gap:12px;}
.page-faq .link{color:var(--teal);text-decoration:underline;text-underline-offset:3px;}
.page-faq .section--deep .link,
.page-faq .section--carbon .link{color:var(--cyan);}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  .page-faq .sync-grid,
  .page-faq .org-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .page-faq .filter-mock__label{min-width:92px;}
}

@media (min-width:900px){
  .page-faq .faq-hero__grid{grid-template-columns:minmax(0,1.32fr) minmax(0,1fr);align-items:start;}
  .page-faq .steps{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-faq .errata-grid{grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);align-items:start;}
  .page-faq .errata-figure{margin-top:0;}
  .page-faq .cta-band__inner{grid-template-columns:minmax(0,1.4fr) auto;}
  .page-faq .cta-band__actions{justify-content:flex-end;}
}

@media (min-width:1180px){
  .page-faq .sync-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-faq .org-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
}

@media (prefers-reduced-motion:reduce){
  .page-faq .step,
  .page-faq .qa,
  .page-faq .sync-card,
  .page-faq .org-item{transition:none;}
  .page-faq .sync-card:hover{transform:none;}
}