/* ===== 问答中心 /questions/ ===== */
.page-faq{
  background:var(--blue-900);
  color:var(--silver-300);
  font-family:var(--font-body);
}

/* --- 首屏 --- */
.page-faq .faq-hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  padding:clamp(36px,7vw,84px) 0 clamp(42px,7vw,90px);
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(880px 420px at 84% -14%, rgba(75,255,158,.18), transparent 64%),
    radial-gradient(760px 430px at 2% 112%, rgba(95,216,245,.16), transparent 62%),
    linear-gradient(158deg, var(--blue-900) 0%, var(--blue-700) 56%, var(--blue-900) 100%);
}
.page-faq .faq-hero::before{
  content:"";
  position:absolute;
  z-index:-1;
  top:-26%;
  right:-16%;
  width:58%;
  height:152%;
  background:linear-gradient(118deg, rgba(75,255,158,.14), rgba(95,216,245,.05) 55%, transparent 82%);
  transform:rotate(11deg);
  pointer-events:none;
}
.page-faq .faq-hero__grid{
  display:grid;
  gap:clamp(26px,5vw,52px);
  align-items:center;
}
.page-faq .faq-hero__kicker{
  margin:0 0 16px;
  color:var(--green-400);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.24em;
}
.page-faq .faq-hero__title{
  margin:0 0 18px;
  color:var(--ice-white);
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(32px,6.2vw,62px);
  line-height:1.08;
  letter-spacing:-.02em;
}
.page-faq .faq-hero__lede{
  max-width:56ch;
  margin:0 0 26px;
  color:var(--silver-300);
  font-size:clamp(15px,1.6vw,17px);
  line-height:1.85;
}
.page-faq .faq-hero__tools{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.page-faq .faq-hero__art{
  position:relative;
  z-index:0;
}
.page-faq .faq-hero__art::after{
  content:"";
  position:absolute;
  z-index:-1;
  inset:auto -6% -10% 16%;
  height:56%;
  background:radial-gradient(closest-side, rgba(95,216,245,.3), transparent 72%);
  filter:blur(8px);
  pointer-events:none;
}
.page-faq .faq-hero__art img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  border-radius:var(--radius);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow);
}

/* --- 面包屑 --- */
.page-faq .faq-crumbs{
  padding-top:18px;
  font-size:13px;
  color:var(--silver-500);
}
.page-faq .faq-crumbs a{
  color:var(--silver-300);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s ease, border-color .2s ease;
}
.page-faq .faq-crumbs a:hover{
  color:var(--green-400);
  border-bottom-color:rgba(75,255,158,.5);
}
.page-faq .faq-crumbs .crumbs__sep{
  margin:0 8px;
  color:var(--silver-500);
}

/* --- 关键词筛选条 --- */
.page-faq .faq-search{
  padding:clamp(20px,4vw,34px) 0;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg, rgba(16,34,76,.55), rgba(8,18,43,.12));
}
.page-faq .faq-search__row{
  display:grid;
  gap:10px;
}
.page-faq .faq-search__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.3em;
  color:var(--silver-500);
}
.page-faq .faq-search__input{
  width:100%;
  padding:14px 16px;
  font-family:var(--font-body);
  font-size:16px;
  color:var(--ice-white);
  background:rgba(27,58,122,.35);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  transition:border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
}
.page-faq .faq-search__input::placeholder{color:var(--silver-500);}
.page-faq .faq-search__input:focus{
  outline:none;
  border-color:var(--green-400);
  background:rgba(27,58,122,.5);
  box-shadow:0 0 0 3px rgba(75,255,158,.18);
}

/* --- 主布局：左索引 + 右问答 --- */
.page-faq .faq-layout{
  display:grid;
  gap:clamp(24px,4vw,52px);
  padding-top:clamp(34px,6vw,70px);
  padding-bottom:clamp(52px,8vw,92px);
}

/* --- 左侧分类索引 --- */
.page-faq .faq-index{
  border-top:2px solid var(--green-400);
  padding-top:14px;
}
.page-faq .faq-index__title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.3em;
  color:var(--silver-500);
}
.page-faq .faq-index__list{
  display:flex;
  flex-wrap:nowrap;
  gap:8px;
  margin:0;
  padding:0 0 6px;
  list-style:none;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
.page-faq .faq-index__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:9px 13px;
  color:var(--silver-300);
  font-size:14px;
  line-height:1.4;
  text-decoration:none;
  white-space:nowrap;
  border-left:2px solid transparent;
  border-radius:var(--radius);
  transition:background-color .2s ease, color .2s ease, border-color .2s ease;
}
.page-faq .faq-index__link:hover{
  background:rgba(27,58,122,.5);
  color:var(--ice-white);
}
.page-faq .faq-index__link.is-active,
.page-faq .faq-index__link[aria-current]{
  color:var(--ice-white);
  background:rgba(27,58,122,.62);
  border-left-color:var(--green-400);
}
.page-faq .faq-index__num{
  font-size:12px;
  letter-spacing:.06em;
  color:var(--cyan-400);
}
.page-faq .faq-index__link.is-active .faq-index__num,
.page-faq .faq-index__link[aria-current] .faq-index__num{
  color:var(--green-400);
}

/* --- 问答分组 --- */
.page-faq .faq-group{
  margin-bottom:clamp(34px,5vw,56px);
  scroll-margin-top:110px;
}
.page-faq .faq-group:last-of-type{margin-bottom:clamp(20px,3vw,30px);}
.page-faq .faq-group__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 14px;
  margin:0 0 16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.page-faq .faq-group__num{
  font-size:13px;
  letter-spacing:.1em;
  color:var(--green-400);
}
.page-faq .faq-group__title{
  margin:0;
  color:var(--ice-white);
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(19px,2.4vw,24px);
  letter-spacing:-.01em;
}
.page-faq .faq-group__hint{
  margin-left:auto;
  font-size:11px;
  letter-spacing:.22em;
  color:var(--silver-500);
}

/* --- 折叠问答条目 --- */
.page-faq .faq-item{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  background:linear-gradient(180deg, rgba(16,34,76,.62), rgba(8,18,43,.62));
  transition:border-color .22s ease, background .22s ease;
}
.page-faq .faq-item + .faq-item{margin-top:10px;}
.page-faq .faq-item:hover{
  border-color:var(--line-strong);
  background:linear-gradient(180deg, rgba(27,58,122,.6), rgba(8,18,43,.72));
}
.page-faq .faq-item[open]{
  border-color:rgba(75,255,158,.42);
  background:linear-gradient(180deg, rgba(27,58,122,.66), rgba(8,18,43,.78));
}
.page-faq .faq-item__head{
  position:relative;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:14px;
  align-items:center;
  padding:16px 18px 16px 22px;
  cursor:pointer;
  list-style:none;
  color:var(--ice-white);
  font-size:clamp(15px,1.7vw,16.5px);
  line-height:1.6;
}
.page-faq .faq-item__head::-webkit-details-marker{display:none;}
.page-faq .faq-item__head::marker{content:"";}
.page-faq .faq-item__head::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:3px;
  background:linear-gradient(180deg, var(--green-400), var(--cyan-400));
  transform:scaleY(0);
  transform-origin:top center;
  transition:transform .3s cubic-bezier(.4,0,.2,1);
}
.page-faq .faq-item__head:hover::before,
.page-faq .faq-item[open] .faq-item__head::before{transform:scaleY(1);}
.page-faq .faq-item__num{
  font-size:12px;
  letter-spacing:.08em;
  color:var(--cyan-400);
  padding-top:2px;
}
.page-faq .faq-item[open] .faq-item__num{color:var(--green-400);}
.page-faq .faq-item__q{
  min-width:0;
}
.page-faq .faq-item__mark{
  position:relative;
  width:16px;
  height:16px;
  flex:none;
}
.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:var(--silver-300);
  transition:transform .26s ease, background-color .26s ease;
}
.page-faq .faq-item__mark::before{
  width:12px;
  height:2px;
  transform:translate(-50%,-50%);
}
.page-faq .faq-item__mark::after{
  width:2px;
  height:12px;
  transform:translate(-50%,-50%);
}
.page-faq .faq-item[open] .faq-item__mark::before{background:var(--green-400);}
.page-faq .faq-item[open] .faq-item__mark::after{transform:translate(-50%,-50%) scaleY(0);}
.page-faq .faq-item__body{
  padding:0 22px 18px 54px;
  color:var(--silver-300);
  font-size:15px;
  line-height:1.85;
}
.page-faq .faq-item__body p{margin:0;}
.page-faq .faq-item__body strong{
  color:var(--ice-white);
  font-weight:700;
}
.page-faq .faq-item[open] .faq-item__body{
  animation:faqRise .32s ease both;
}
@keyframes faqRise{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:none;}
}

/* --- 图文说明 --- */
.page-faq .faq-figure{
  margin:0 0 clamp(34px,5vw,56px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--blue-700);
}
.page-faq .faq-figure img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
}
.page-faq .faq-figure__cap{
  padding:12px 16px;
  border-top:1px solid var(--line);
  background:rgba(8,18,43,.7);
  color:var(--silver-300);
  font-size:13px;
  line-height:1.7;
}

/* --- 联系引导面板 --- */
.page-faq .faq-ask{
  padding:clamp(20px,3.5vw,34px);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  background:
    radial-gradient(520px 240px at 100% 0%, rgba(255,122,41,.15), transparent 68%),
    linear-gradient(150deg, rgba(27,58,122,.7), rgba(8,18,43,.88));
}
.page-faq .faq-ask__lede{
  margin:0 0 22px;
  color:var(--silver-300);
  font-size:15px;
  line-height:1.85;
}
.page-faq .faq-ask__grid{
  display:grid;
  gap:14px;
  margin-bottom:24px;
}
.page-faq .faq-ask__cell{
  padding:16px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:rgba(8,18,43,.62);
}
.page-faq .faq-ask__num{
  display:block;
  margin-bottom:8px;
  font-size:11px;
  letter-spacing:.2em;
  color:var(--cyan-400);
}
.page-faq .faq-ask__label{
  margin:0 0 6px;
  color:var(--ice-white);
  font-size:15px;
  font-weight:700;
  line-height:1.5;
}
.page-faq .faq-ask__label--mono{
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.02em;
  color:var(--green-400);
  word-break:break-all;
}
.page-faq .faq-ask__text{
  margin:0;
  color:var(--silver-300);
  font-size:13.5px;
  line-height:1.75;
}

/* --- 空态 --- */
.page-faq .faq-empty{
  margin:18px 0 0;
  padding:14px 16px;
  border-left:3px solid var(--orange-500);
  border-radius:0 var(--radius) var(--radius) 0;
  background:rgba(255,122,41,.09);
  color:var(--silver-300);
  font-size:15px;
  line-height:1.7;
}

/* --- 响应式 --- */
@media (min-width:760px){
  .page-faq .faq-search__row{
    grid-template-columns:auto minmax(0,1fr);
    align-items:center;
    gap:22px;
  }
  .page-faq .faq-ask__grid{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
}

@media (min-width:900px){
  .page-faq .faq-hero__grid{
    grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  }
  .page-faq .faq-layout{
    grid-template-columns:minmax(0,246px) minmax(0,1fr);
    align-items:start;
  }
  .page-faq .faq-index{
    position:sticky;
    top:92px;
  }
  .page-faq .faq-index__list{
    display:grid;
    gap:2px;
    overflow:visible;
    padding-bottom:0;
  }
  .page-faq .faq-index__link{
    white-space:normal;
    align-items:flex-start;
    padding:10px 14px;
    border-radius:0 var(--radius) var(--radius) 0;
  }
  .page-faq .faq-group__hint{margin-left:auto;}
}

@media (max-width:560px){
  .page-faq .faq-item__head{
    padding:14px 14px 14px 16px;
    gap:10px;
  }
  .page-faq .faq-item__body{
    padding:0 16px 16px 16px;
  }
  .page-faq .faq-group__hint{
    width:100%;
    margin-left:0;
  }
  .page-faq .faq-ask__label--mono{font-size:13px;}
}

@media (prefers-reduced-motion:reduce){
  .page-faq .faq-item[open] .faq-item__body{animation:none;}
  .page-faq .faq-item__head::before,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after{transition:none;}
}