.page-faq{
  --faq-hair: rgba(31,53,96,.9);
  --faq-soft: rgba(31,53,96,.6);
  --faq-panel: rgba(16,31,60,.72);
  --faq-dim: rgba(108,129,168,.78);
  --faq-faint: rgba(108,129,168,.46);
  background: var(--deep);
  color: var(--fog);
  padding-bottom: clamp(48px,8vw,110px);
  overflow-x: clip;
}

.page-faq a:focus-visible,
.page-faq button:focus-visible{
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb{
  padding-top: clamp(18px,3.4vw,34px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(22px,3.4vw,40px);
  padding-block: clamp(20px,3.6vw,44px) clamp(26px,4vw,54px);
}
.page-faq .faq-hero__lead .index-label{
  margin: 0 0 14px;
}
.page-faq .faq-hero h1{
  margin: 0 0 18px;
}
.page-faq .faq-lede{
  margin: 0;
  max-width: 40em;
  font-size: clamp(15px,1.5vw,17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__side{
  border-top: 1px solid var(--faq-hair);
  padding-top: 18px;
}
.page-faq .faq-checklist{
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}
.page-faq .faq-checklist li{
  display: grid;
  grid-template-columns: auto minmax(0,1fr);
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}
.page-faq .faq-checklist .mono{
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--gold);
}

/* ---------- 横幅 ---------- */
.page-faq .faq-banner{
  margin-bottom: clamp(30px,4.4vw,58px);
}
.page-faq .faq-frame{
  display: block;
  margin: 0;
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-organic);
  overflow: hidden;
  background: var(--panel);
}
.page-faq .faq-frame img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  filter: saturate(.88) contrast(1.04);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-main{
  padding-top: 0;
}
.page-faq .faq-layout{
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: clamp(26px,3.6vw,48px);
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-index__head{
  margin: 0 0 12px;
}
.page-faq .faq-index__list{
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-index__list li{
  flex: 0 0 auto;
}
.page-faq .faq-index__item{
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 10px 14px;
  border: 1px solid var(--faq-hair);
  border-radius: 3px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.2;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease);
}
.page-faq .faq-index__item .mono{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--faq-faint);
  transition: color var(--t-fast) var(--ease);
}
.page-faq .faq-index__item:hover{
  color: var(--fog);
  border-color: var(--cyan);
  background: var(--faq-panel);
}
.page-faq .faq-index__item:hover .mono{
  color: var(--cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-groups > .qa-group + .qa-group{
  margin-top: clamp(34px,4.6vw,64px);
}
.page-faq .qa-group{
  scroll-margin-top: 100px;
}
.page-faq .qa-group::after{
  content: "";
  display: block;
  clear: both;
}
.page-faq .qa-group .section-head{
  margin-bottom: clamp(16px,2vw,24px);
}
.page-faq .qa-group .section-head h2{
  margin: 8px 0 0;
}

/* ---------- 组内示意图 ---------- */
.page-faq .faq-figure{
  margin: 0 0 clamp(18px,2.4vw,26px);
  border: 1px solid var(--faq-hair);
  border-radius: 4px;
  overflow: hidden;
  background: var(--panel);
}
.page-faq .faq-figure img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 2;
  object-fit: cover;
}
.page-faq .faq-figure .media-caption{
  display: block;
  padding: 11px 16px 13px;
  border-top: 1px solid var(--faq-hair);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--faq-dim);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa{
  border-top: 1px solid var(--faq-hair);
}
.page-faq .qa:last-child{
  border-bottom: 1px solid var(--faq-hair);
}
.page-faq .qa__q{
  display: grid;
  grid-template-columns: auto minmax(0,1fr) auto;
  align-items: start;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 19px 4px;
  background: none;
  border: 0;
  color: var(--fog);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--t-fast) var(--ease);
}
.page-faq .qa__q:hover{
  background: rgba(16,31,60,.6);
}
.page-faq .qa__no{
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--faq-faint);
  transition: color var(--t-fast) var(--ease);
}
.page-faq .qa__text{
  font-size: clamp(15px,1.6vw,17px);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: .01em;
}
.page-faq .qa__q:hover .qa__no{
  color: var(--gold);
}
.page-faq .qa__q:hover .expand-mark::before,
.page-faq .qa__q:hover .expand-mark::after{
  background: var(--gold);
}

.page-faq .expand-mark{
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  transition: transform 180ms var(--ease);
}
.page-faq .expand-mark::before,
.page-faq .expand-mark::after{
  content: "";
  position: absolute;
  background: var(--muted);
  transition: background-color var(--t-fast) var(--ease);
}
.page-faq .expand-mark::before{
  left: 0;
  top: 6.5px;
  width: 14px;
  height: 1px;
}
.page-faq .expand-mark::after{
  left: 6.5px;
  top: 0;
  width: 1px;
  height: 14px;
}
.page-faq [data-expand][data-open="true"] .expand-mark{
  transform: rotate(45deg);
}
.page-faq [data-expand][data-open="true"] .expand-mark::before,
.page-faq [data-expand][data-open="true"] .expand-mark::after{
  background: var(--gold);
}
.page-faq [data-expand][data-open="false"] > .expand-body{
  display: none;
}

.page-faq .qa__body{
  margin: 0 0 22px;
  padding: 2px 0 2px clamp(14px,2vw,22px);
  border-left: 1px solid var(--edge);
  max-width: 46em;
}
.page-faq .qa__body p{
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}
.page-faq .qa__body p:first-child{
  color: var(--fog);
}
.page-faq .qa__body p:last-of-type{
  margin-bottom: 0;
}
.page-faq .qa__link{
  display: inline-block;
  margin-top: 14px;
  padding-bottom: 2px;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53,223,214,.38);
  transition: color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}
.page-faq .qa__link:hover{
  color: var(--fog);
  border-color: var(--fog);
}
.page-faq .qa__body .copy-btn{
  margin-top: 14px;
}

/* ---------- 组间反色薄条 ---------- */
.page-faq .faq-break{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  margin: clamp(28px,4vw,48px) 0;
  padding: 12px 18px;
  border-radius: 2px;
  font-size: 13px;
  line-height: 1.65;
}
.page-faq .faq-break .mono{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  opacity: .7;
}
.page-faq .faq-break a{
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* ---------- 平板 ---------- */
@media (min-width: 860px){
  .page-faq .faq-hero{
    grid-template-columns: 1.15fr .85fr;
    align-items: end;
  }
  .page-faq .faq-hero__side{
    border-top: 0;
    border-left: 1px solid var(--faq-hair);
    padding: 4px 0 4px clamp(18px,2.4vw,34px);
  }
  .page-faq .faq-figure{
    float: right;
    width: min(46%, 360px);
    margin: 4px 0 20px 28px;
  }
  .page-faq .faq-figure img{
    aspect-ratio: 5 / 4;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px){
  .page-faq .faq-layout{
    grid-template-columns: minmax(200px, 250px) minmax(0,1fr);
    gap: clamp(34px,4.6vw,72px);
  }
  .page-faq .faq-index{
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-faq .faq-index__list{
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }
  .page-faq .faq-index__list li{
    flex: none;
  }
  .page-faq .faq-index__item{
    display: flex;
    width: 100%;
    padding: 10px 10px 10px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
  }
  .page-faq .faq-index__item:hover,
  .page-faq .faq-index__item:focus-visible{
    border-left-color: var(--gold);
    background: var(--faq-panel);
  }
  .page-faq .qa__q{
    padding: 21px 6px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-faq *{
    transition-duration: 1ms !important;
  }
  .page-faq [data-expand][data-open="true"] .expand-mark{
    transform: none;
  }
}