.page-faq{
  --faq-line: rgba(199, 215, 227, .14);
  --faq-line-strong: rgba(56, 224, 208, .38);
  padding-bottom: 72px;
  overflow-x: clip;
}

.page-faq .breadcrumb{
  margin: 6px 0 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero{
  position: relative;
  display: grid;
  gap: 26px;
  padding: clamp(20px, 4vw, 44px);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(56, 224, 208, .16) 0%, rgba(56, 224, 208, 0) 58%),
    linear-gradient(160deg, var(--ink-900) 0%, var(--ink-950) 74%);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.page-faq .faq-hero::after{
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 260px;
  height: 260px;
  border-radius: 46% 54% 62% 38% / 52% 40% 60% 48%;
  background: rgba(255, 178, 74, .08);
  pointer-events: none;
}

.page-faq .faq-hero__copy{
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1{
  margin: 10px 0 16px;
  font-size: clamp(1.85rem, 5vw, 3.1rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--snow-50);
  text-wrap: balance;
}

.page-faq .faq-hero .lede{
  max-width: 62ch;
  margin: 0;
  color: var(--ice-200);
  font-size: clamp(.97rem, 1.6vw, 1.06rem);
  line-height: 1.82;
}

.page-faq .faq-stats{
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-stats .stat{
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 92px;
}

.page-faq .faq-stats .stat__value{
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 600;
  color: var(--cyan-300);
  letter-spacing: -.01em;
}

.page-faq .faq-stats .stat__label{
  font-size: .78rem;
  color: var(--fog-400);
  letter-spacing: .02em;
}

.page-faq .faq-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-hero__media{
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__media .media-frame{
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-faq img{
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 工作区 ---------- */
.page-faq .faq-workbench{
  display: grid;
  gap: 24px;
  margin-top: 34px;
}

/* 左侧查找栏 */
.page-faq .faq-filter{
  padding: 20px 18px;
  border: 1px solid var(--ink-700);
  border-left: 2px solid var(--cyan-500);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, var(--ink-900), var(--ink-950));
}

.page-faq .faq-filter .kicker{
  display: block;
  margin-bottom: 12px;
}

.page-faq .faq-search{
  display: grid;
  gap: 8px;
}

.page-faq .faq-search__label{
  font-size: .82rem;
  color: var(--fog-400);
  letter-spacing: .04em;
}

.page-faq .faq-search__input{
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  border: 1px solid var(--ink-700);
  border-radius: 10px;
  background: var(--ink-950);
  color: var(--snow-50);
  font-family: var(--font-sans);
  font-size: .95rem;
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-faq .faq-search__input::placeholder{
  color: var(--fog-400);
}

.page-faq .faq-search__input:focus{
  outline: none;
  border-color: var(--cyan-500);
  box-shadow: 0 0 0 3px rgba(56, 224, 208, .22);
}

.page-faq .faq-search__hint{
  margin: 0;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--fog-400);
}

.page-faq .faq-cats{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-cat{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  background: rgba(18, 59, 87, .28);
  color: var(--ice-200);
  font-size: .86rem;
  text-decoration: none;
  transition: border-color var(--dur) ease, color var(--dur) ease, transform var(--dur) ease;
}

.page-faq .faq-cat__idx{
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--cyan-500);
  letter-spacing: .04em;
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible{
  border-color: var(--cyan-500);
  color: var(--snow-50);
  transform: translateY(-2px);
}

.page-faq .faq-filter__foot{
  margin: 16px 0 0;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--amber-300);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-flow{
  display: grid;
  gap: 20px;
  min-width: 0;
}

.page-faq .faq-group{
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, var(--ink-800) 0%, var(--ink-900) 100%);
  box-shadow: var(--shadow-panel);
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

.page-faq .faq-group__head{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 14px;
}

.page-faq .faq-group__num{
  display: inline-block;
  padding: 4px 8px;
  border: 1px solid var(--faq-line-strong);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--cyan-300);
  letter-spacing: .06em;
}

.page-faq .faq-group__title{
  margin: 0 0 8px;
  font-size: clamp(1.16rem, 2.4vw, 1.5rem);
  line-height: 1.34;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--snow-50);
}

.page-faq .faq-group__note{
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--fog-400);
  max-width: 66ch;
}

.page-faq .faq-item{
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-item__q{
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 15px 30px 15px 2px;
  position: relative;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--snow-50);
  transition: color var(--dur) ease;
}

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

.page-faq .faq-item__q::after{
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--cyan-500);
  border-bottom: 2px solid var(--cyan-500);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--dur) ease;
}

.page-faq .faq-item[open] > .faq-item__q::after{
  transform: translateY(-30%) rotate(-135deg);
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible{
  color: var(--cyan-300);
  outline: none;
}

.page-faq .faq-item__q:focus-visible{
  box-shadow: inset 0 0 0 2px rgba(56, 224, 208, .55);
  border-radius: 6px;
}

.page-faq .faq-item__idx{
  flex: none;
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 500;
  color: var(--amber-300);
  letter-spacing: .04em;
  padding-top: 3px;
}

.page-faq .faq-item__body{
  padding: 0 8px 18px 2px;
  color: var(--ice-200);
  font-size: .95rem;
  line-height: 1.82;
  max-width: 70ch;
}

.page-faq .faq-item__body p{
  margin: 0 0 10px;
}

.page-faq .faq-item__body p:last-of-type{
  margin-bottom: 6px;
}

.page-faq .faq-next{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  color: var(--cyan-500);
  font-size: .88rem;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dashed rgba(56, 224, 208, .45);
  padding-bottom: 2px;
  transition: color var(--dur) ease, transform var(--dur) ease, border-color var(--dur) ease;
}

.page-faq .faq-next:hover,
.page-faq .faq-next:focus-visible{
  color: var(--cyan-300);
  border-color: var(--cyan-300);
  transform: translateX(3px);
  outline: none;
}

.page-faq .faq-figure{
  margin: 20px 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--ink-700);
  background: var(--ink-950);
}

.page-faq .faq-figure .media-frame__caption{
  padding: 10px 14px;
  font-size: .78rem;
  line-height: 1.65;
  color: var(--fog-400);
}

/* ---------- 联系准备 ---------- */
.page-faq .faq-group--contact{
  background:
    radial-gradient(100% 80% at 0% 0%, rgba(255, 178, 74, .1) 0%, rgba(255, 178, 74, 0) 60%),
    linear-gradient(170deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-faq .faq-prep{
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-prep li{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 14px;
  border: 1px solid var(--ink-700);
  border-radius: 10px;
  background: rgba(4, 19, 31, .55);
  font-size: .92rem;
  line-height: 1.72;
  color: var(--ice-200);
}

.page-faq .faq-prep__num{
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--amber-300);
  padding-top: 2px;
}

.page-faq .faq-contact{
  margin-top: 20px;
  padding: 18px;
  border: 1px dashed var(--ink-700);
  border-radius: var(--radius-md);
  background: rgba(4, 19, 31, .6);
}

.page-faq .faq-contact__label{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--cyan-300);
}

.page-faq .faq-contact .copy-btn{
  margin-bottom: 12px;
}

.page-faq .faq-contact__line{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: .9rem;
  color: var(--snow-50);
}

.page-faq .faq-contact__note{
  margin: 0;
  font-size: .84rem;
  line-height: 1.75;
  color: var(--fog-400);
  max-width: 62ch;
}

/* ---------- 回到顶部 ---------- */
.page-faq .faq-back-wrap{
  margin: 0;
  text-align: right;
}

.page-faq .faq-back{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  color: var(--ice-200);
  font-size: .84rem;
  text-decoration: none;
  transition: border-color var(--dur) ease, color var(--dur) ease;
}

.page-faq .faq-back:hover,
.page-faq .faq-back:focus-visible{
  border-color: var(--cyan-500);
  color: var(--cyan-300);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px){
  .page-faq .faq-hero{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
  }

  .page-faq .faq-stats{
    gap: 14px 34px;
  }
}

@media (min-width: 1080px){
  .page-faq .faq-workbench{
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 38px;
    align-items: start;
  }

  .page-faq .faq-filter{
    position: sticky;
    top: calc(var(--bar-h) + 18px);
  }

  .page-faq .faq-cats{
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-cat{
    border-radius: 10px;
    justify-content: flex-start;
  }

  .page-faq .faq-group__head{
    gap: 18px;
    padding-bottom: 16px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-faq .faq-cat,
  .page-faq .faq-next,
  .page-faq .faq-item__q::after,
  .page-faq .faq-search__input{
    transition: none;
  }

  .page-faq .faq-cat:hover,
  .page-faq .faq-next:hover{
    transform: none;
  }
}