/* ============================================================
   帮助中心 · page-faq
   移动端优先，1024px 起切换为索引 + 答案流双栏
   ============================================================ */

/* ---------- 首屏 ---------- */
.page-faq .faq-hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  padding:clamp(1.5rem,4.5vw,2.75rem) 0 clamp(1.75rem,4vw,2.75rem);
  background:linear-gradient(180deg,var(--ink-900),var(--ink));
}
.page-faq .faq-hero__bg{
  position:absolute;
  inset:0;
  z-index:-2;
}
.page-faq .faq-hero__bg img{
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.32;
  filter:saturate(.82);
}
.page-faq .faq-hero::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(120% 100% at 84% 0%, rgba(232,181,74,.20), transparent 58%),
    linear-gradient(180deg, rgba(11,7,19,.55) 0%, rgba(21,11,36,.94) 72%, var(--ink) 100%);
}
.page-faq .faq-hero__inner{
  display:grid;
  gap:.9rem;
}

.page-faq .breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  margin:0;
  padding:0;
  list-style:none;
  font-size:.8125rem;
  color:var(--muted);
}
.page-faq .breadcrumb li{
  display:flex;
  align-items:center;
  gap:.5rem;
}
.page-faq .breadcrumb li + li::before{
  content:"/";
  color:rgba(185,174,203,.45);
}
.page-faq .breadcrumb a{
  color:var(--muted);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible{
  color:var(--gold);
}
.page-faq .breadcrumb [aria-current]{
  color:var(--ivory);
}

.page-faq .faq-hero__title{
  margin:0;
  max-width:20em;
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(1.75rem,4.6vw,3rem);
  line-height:1.24;
  letter-spacing:-.01em;
  color:var(--ivory);
}
.page-faq .faq-hero__lede{
  margin:0;
  max-width:38em;
  font-size:clamp(.9688rem,1.6vw,1.0625rem);
  line-height:1.78;
  color:var(--muted);
}
.page-faq .faq-facts{
  display:flex;
  flex-wrap:wrap;
  gap:.45rem 1.5rem;
  margin:.35rem 0 0;
  padding:0;
  list-style:none;
  font-size:.8438rem;
  color:var(--muted);
}
.page-faq .faq-facts li{
  display:flex;
  align-items:baseline;
  gap:.4rem;
}
.page-faq .faq-facts b{
  font-family:var(--mono);
  font-size:1rem;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--gold);
}

/* ---------- 搜索条 ---------- */
.page-faq .faq-find{
  padding:clamp(1.25rem,3vw,2rem) 0 0;
}
.page-faq .faq-search{
  display:grid;
  gap:.6rem;
  padding:1.05rem 1.1rem 1.15rem;
  border:1px solid rgba(232,181,74,.26);
  border-radius:var(--radius-lg);
  background:linear-gradient(180deg,rgba(36,20,54,.96),rgba(21,11,36,.96));
  box-shadow:0 20px 50px -32px rgba(0,0,0,.95);
}
.page-faq .faq-search__label{
  font-family:var(--mono);
  font-size:.75rem;
  letter-spacing:.16em;
  color:var(--gold);
}
.page-faq .faq-search__input{
  width:100%;
  box-sizing:border-box;
  padding:.82rem .95rem;
  font-family:var(--sans);
  font-size:1rem;
  color:var(--ivory);
  background:var(--ink-900);
  border:1px solid rgba(185,174,203,.26);
  border-radius:12px;
  transition:border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-faq .faq-search__input::placeholder{
  color:rgba(185,174,203,.6);
}
.page-faq .faq-search__input:focus{
  outline:none;
  border-color:var(--gold);
  box-shadow:0 0 0 3px rgba(232,181,74,.18);
}
.page-faq .faq-search__status{
  margin:0;
  min-height:1.25em;
  font-size:.8125rem;
  line-height:1.6;
  color:var(--muted);
}

/* ---------- 高频问题 ---------- */
.page-faq .faq-top{
  padding:clamp(2rem,4.5vw,3.25rem) 0 0;
}
.page-faq .faq-top__list{
  display:grid;
  gap:.65rem;
  margin:1.5rem 0 0;
  padding:0;
  list-style:none;
}
.page-faq .faq-top__item{
  min-width:0;
}
.page-faq .faq-top__link{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:.3rem .8rem;
  padding:.95rem 1rem;
  border:1px solid rgba(185,174,203,.14);
  border-radius:14px;
  background:var(--ink-2);
  text-decoration:none;
  transition:transform 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}
.page-faq .faq-top__num{
  grid-row:span 2;
  font-family:var(--mono);
  font-size:.75rem;
  letter-spacing:.12em;
  color:var(--gold);
  padding-top:.2rem;
}
.page-faq .faq-top__q{
  font-size:.9375rem;
  font-weight:600;
  line-height:1.6;
  color:var(--ivory);
}
.page-faq .faq-top__a{
  font-size:.8438rem;
  line-height:1.68;
  color:var(--muted);
}
.page-faq .faq-top__link:hover,
.page-faq .faq-top__link:focus-visible{
  transform:translateY(-2px);
  border-color:rgba(232,181,74,.55);
  background:rgba(36,20,54,.92);
}

/* ---------- 主体：索引 + 答案流 ---------- */
.page-faq .faq-body{
  padding:clamp(2rem,4.5vw,3.5rem) 0 clamp(2rem,4vw,3rem);
}
.page-faq .faq-body__grid{
  display:grid;
  gap:1.75rem;
  min-width:0;
}
.page-faq .faq-index{
  min-width:0;
}
.page-faq .faq-index__inner{
  display:grid;
  gap:1rem;
  padding:1rem 1.05rem 1.15rem;
  border:1px solid rgba(185,174,203,.16);
  border-radius:var(--radius);
  background:rgba(36,20,54,.55);
}
.page-faq .faq-index__title{
  margin:0;
  font-family:var(--mono);
  font-size:.75rem;
  letter-spacing:.16em;
  color:var(--gold);
}
.page-faq .faq-index__list{
  display:flex;
  gap:.5rem;
  margin:0;
  padding:0 0 .3rem;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:thin;
  -webkit-overflow-scrolling:touch;
}
.page-faq .faq-index__link{
  display:flex;
  flex:0 0 auto;
  align-items:baseline;
  gap:.45rem;
  padding:.42rem .8rem;
  border:1px solid rgba(185,174,203,.24);
  border-radius:999px;
  font-size:.8438rem;
  color:var(--muted);
  text-decoration:none;
  white-space:nowrap;
  transition:color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}
.page-faq .faq-index__num{
  font-family:var(--mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  color:var(--gold);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible{
  color:var(--ivory);
  border-color:var(--gold);
  background:rgba(232,181,74,.1);
}
.page-faq .faq-index__figure{
  margin:0;
}

.page-faq .faq-stream{
  min-width:0;
}
.page-faq .faq-stream .section__head{
  margin-bottom:1.5rem;
}
.page-faq .faq-stream h2{
  margin:.25rem 0 .5rem;
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(1.35rem,2.6vw,1.9rem);
  line-height:1.3;
  color:var(--ivory);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group + .faq-group{
  margin-top:2.25rem;
}
.page-faq .faq-group__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:.4rem .7rem;
  padding-bottom:.75rem;
  border-bottom:1px solid rgba(232,181,74,.28);
}
.page-faq .faq-group__head .coord-tag{
  font-family:var(--mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  color:var(--gold);
  border:1px solid rgba(232,181,74,.42);
  border-radius:999px;
  padding:.1rem .5rem;
  white-space:nowrap;
}
.page-faq .faq-group__title{
  margin:0;
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(1.15rem,2vw,1.4rem);
  color:var(--ivory);
}
.page-faq .faq-group__desc{
  flex:1 1 100%;
  margin:0;
  font-size:.8125rem;
  line-height:1.65;
  color:var(--muted);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list{
  display:grid;
}
.page-faq .faq-item{
  position:relative;
  min-width:0;
  border-bottom:1px solid rgba(185,174,203,.12);
}
.page-faq .faq-item::before{
  content:"";
  position:absolute;
  left:0;
  top:.9rem;
  bottom:.9rem;
  width:2px;
  border-radius:2px;
  background:var(--green);
  opacity:0;
  transition:opacity 180ms var(--ease);
}
.page-faq .faq-item[open]::before{
  opacity:1;
}
.page-faq .faq-item__q{
  display:flex;
  align-items:flex-start;
  gap:.6rem;
  padding:.95rem .25rem .95rem .9rem;
  font-size:.9375rem;
  font-weight:600;
  line-height:1.62;
  color:var(--ivory);
  cursor:pointer;
  list-style:none;
  transition:color var(--dur) var(--ease);
}
.page-faq .faq-item__q::-webkit-details-marker{
  display:none;
}
.page-faq .faq-item__q::marker{
  content:"";
}
.page-faq .faq-item__q::after{
  content:"";
  flex:0 0 auto;
  width:.5rem;
  height:.5rem;
  margin-top:.45rem;
  margin-left:auto;
  border-right:2px solid var(--gold);
  border-bottom:2px solid var(--gold);
  transform:rotate(45deg);
  transition:transform 180ms var(--ease);
}
.page-faq .faq-item[open] .faq-item__q::after{
  transform:rotate(-135deg);
}
.page-faq .faq-item__q:hover{
  color:var(--gold);
}
.page-faq .faq-item__a{
  padding:0 .25rem 1.15rem 1.1rem;
  animation:faq-reveal 200ms var(--ease);
}
.page-faq .faq-item__lead{
  margin:0 0 .8rem;
  padding:.55rem .75rem;
  border-radius:10px;
  background:rgba(232,181,74,.09);
  font-size:.9063rem;
  line-height:1.72;
  color:var(--ivory);
}
.page-faq .faq-steps{
  display:grid;
  gap:.55rem;
  margin:0;
  padding:0;
  list-style:none;
  counter-reset:faqstep;
}
.page-faq .faq-steps li{
  display:grid;
  grid-template-columns:1.9rem minmax(0,1fr);
  gap:.5rem;
  font-size:.875rem;
  line-height:1.74;
  color:var(--muted);
  counter-increment:faqstep;
}
.page-faq .faq-steps li::before{
  content:"0" counter(faqstep);
  font-family:var(--mono);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--gold);
  text-align:right;
  padding-top:.16rem;
}

@keyframes faq-reveal{
  from{ opacity:0; transform:translateY(-4px); }
  to{ opacity:1; transform:translateY(0); }
}

/* ---------- 升级横幅 ---------- */
.page-faq .faq-upgrade{
  padding:0 0 clamp(2.5rem,5vw,4rem);
}
.page-faq .faq-upgrade__card{
  position:relative;
  overflow:hidden;
  display:grid;
  gap:1.6rem;
  padding:clamp(1.35rem,4vw,2.5rem);
  border:1px solid rgba(232,181,74,.3);
  border-radius:var(--radius-lg);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(232,181,74,.18), transparent 58%),
    linear-gradient(160deg, var(--ink-2) 0%, var(--ink-900) 100%);
}
.page-faq .faq-upgrade__card::after{
  content:"";
  position:absolute;
  right:-90px;
  bottom:-120px;
  width:250px;
  height:250px;
  border-radius:46% 54% 62% 38% / 48% 42% 58% 52%;
  background:linear-gradient(135deg, rgba(63,122,99,.34), rgba(200,106,60,.18));
  pointer-events:none;
}
.page-faq .faq-upgrade__copy,
.page-faq .faq-upgrade__channels{
  position:relative;
  z-index:1;
  min-width:0;
}
.page-faq .faq-upgrade__card h2{
  margin:.2rem 0 .75rem;
  font-family:var(--serif);
  font-weight:700;
  font-size:clamp(1.35rem,2.8vw,1.9rem);
  line-height:1.3;
  color:var(--ivory);
}
.page-faq .faq-upgrade__text{
  margin:0;
  max-width:34em;
  font-size:.9375rem;
  line-height:1.78;
  color:var(--muted);
}
.page-faq .faq-upgrade__list{
  display:grid;
  gap:.35rem;
  margin:1rem 0 0;
  padding:0;
  list-style:none;
}
.page-faq .faq-upgrade__list li{
  display:grid;
  grid-template-columns:1rem minmax(0,1fr);
  gap:.4rem;
  font-size:.875rem;
  line-height:1.72;
  color:var(--muted);
}
.page-faq .faq-upgrade__list li::before{
  content:"—";
  color:var(--gold);
}
.page-faq .faq-upgrade__foot{
  margin:1rem 0 0;
  font-size:.8438rem;
  line-height:1.72;
  color:var(--muted);
}
.page-faq .faq-upgrade__foot a{
  color:var(--gold);
  text-decoration:none;
  border-bottom:1px solid rgba(232,181,74,.4);
}
.page-faq .faq-upgrade__foot a:hover,
.page-faq .faq-upgrade__foot a:focus-visible{
  border-bottom-color:var(--gold);
}

.page-faq .faq-upgrade__channels{
  display:grid;
  gap:.7rem;
}
.page-faq .faq-channel{
  display:grid;
  gap:.2rem;
  padding:.9rem 1rem;
  border:1px solid rgba(185,174,203,.18);
  border-radius:14px;
  background:rgba(21,11,36,.66);
  text-decoration:none;
  transition:border-color 160ms var(--ease), transform 160ms var(--ease), background 160ms var(--ease);
}
.page-faq .faq-channel__k{
  font-family:var(--mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  color:var(--gold);
}
.page-faq .faq-channel__v{
  font-family:var(--mono);
  font-size:.9688rem;
  letter-spacing:.06em;
  color:var(--ivory);
  overflow-wrap:anywhere;
}
.page-faq .faq-channel__n{
  font-size:.8125rem;
  line-height:1.65;
  color:var(--muted);
}
.page-faq .faq-channel:hover,
.page-faq .faq-channel:focus-visible{
  transform:translateY(-2px);
  border-color:rgba(232,181,74,.55);
  background:rgba(36,20,54,.85);
}
.page-faq .faq-upgrade__btn{
  justify-self:start;
  margin-top:.35rem;
}

/* ---------- 设备适配 ---------- */
@media (min-width:640px){
  .page-faq .faq-top__list{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:.75rem;
  }
  .page-faq .faq-upgrade__channels{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-faq .faq-upgrade__btn{
    grid-column:1 / -1;
  }
}

@media (min-width:1024px){
  .page-faq .faq-body__grid{
    grid-template-columns:minmax(180px,216px) minmax(0,1fr);
    gap:clamp(1.75rem,3vw,2.75rem);
    align-items:start;
  }
  .page-faq .faq-index{
    position:sticky;
    top:calc(var(--bar-h) + 1.25rem);
  }
  .page-faq .faq-index__list{
    display:grid;
    gap:0;
    overflow:visible;
    padding:0;
    border-left:1px solid rgba(185,174,203,.22);
  }
  .page-faq .faq-index__link{
    flex:none;
    border:0;
    border-radius:0;
    border-left:2px solid transparent;
    margin-left:-1px;
    padding:.45rem .4rem .45rem .8rem;
    font-size:.875rem;
    white-space:normal;
    background:none;
    transition:color 160ms var(--ease), border-color 160ms var(--ease), transform 160ms var(--ease);
  }
  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible{
    border-left-color:var(--gold);
    transform:translateX(3px);
    background:none;
  }
  .page-faq .faq-index__figure{
    margin-top:.25rem;
  }
  .page-faq .faq-upgrade__card{
    grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
    gap:2.25rem;
    align-items:start;
  }
  .page-faq .faq-upgrade__channels{
    grid-template-columns:1fr;
  }
  .page-faq .faq-upgrade__btn{
    grid-column:auto;
  }
}

@media (min-width:1280px){
  .page-faq .faq-item__q{
    font-size:1rem;
  }
  .page-faq .faq-item__a{
    padding-left:1.35rem;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-faq .faq-item__a{
    animation:none;
  }
  .page-faq .faq-top__link:hover,
  .page-faq .faq-channel:hover,
  .page-faq .faq-index__link:hover{
    transform:none;
  }
}
<<<END>>>