.page-faq{
  --faq-line: rgba(36,49,79,.72);
  --faq-soft: rgba(243,245,249,.68);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: clip;
  padding-bottom: clamp(48px,8vw,120px);
}

.page-faq .faq-shell{
  width: min(1240px, 94vw);
  margin-inline: auto;
}

.page-faq .faq-bread{
  width: min(1240px, 94vw);
  margin-inline: auto;
  padding-top: clamp(20px,3vw,34px);
  color: var(--muted);
}

.page-faq .faq-bread a{
  color: var(--muted);
  text-decoration: none;
  transition: color .32s var(--ease);
}

.page-faq .faq-bread a:hover{
  color: var(--cyan);
}

/* ---------- 封面 ---------- */

.page-faq .faq-cover{
  padding: clamp(30px,6vw,76px) 0 clamp(40px,6vw,84px);
}

.page-faq .faq-cover-idx{
  margin: 0 0 clamp(18px,2.6vw,30px);
  color: var(--muted);
}

.page-faq .faq-cover-idx .idx-num{
  color: var(--amber);
}

.page-faq .faq-h1{
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(34px,6.4vw,92px);
  line-height: 1.02;
  letter-spacing: -.02em;
  margin: 0 0 clamp(22px,3vw,36px);
  max-width: 16em;
  color: var(--paper);
}

.page-faq .faq-lead{
  margin: 0;
  max-width: 36em;
  font-size: clamp(15px,1.55vw,18px);
  line-height: 1.9;
  color: var(--faq-soft);
}

.page-faq .faq-cover-figure{
  margin: clamp(34px,5vw,68px) 0 0;
  padding: 8px;
  border: 1px solid var(--faq-line);
  position: relative;
}

.page-faq .faq-cover-figure::after{
  content: "";
  position: absolute;
  inset: 8px;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(63,232,200,.16) 0 1px, transparent 1px 100%) 0 0 / 80px 100%,
    linear-gradient(180deg, rgba(122,92,255,.14) 0 1px, transparent 1px 100%) 0 0 / 100% 80px;
  mix-blend-mode: screen;
}

.page-faq .faq-cover-figure img{
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-faq .faq-figcap{
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* ---------- 更新节奏带 ---------- */

.page-faq .faq-beat{
  background: var(--cloud);
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  padding: clamp(34px,5vw,66px) 0;
}

.page-faq .faq-beat-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(24px,3vw,44px);
  grid-template-columns: 1fr;
}

.page-faq .faq-beat-item{
  padding-left: 18px;
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-beat-item:nth-child(2){
  border-left-color: var(--violet);
}

.page-faq .faq-beat-item:nth-child(3){
  border-left-color: var(--amber);
}

.page-faq .faq-beat-num{
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px,3.8vw,46px);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-faq .faq-beat-item:nth-child(2) .faq-beat-num{
  color: var(--violet);
}

.page-faq .faq-beat-item:nth-child(3) .faq-beat-num{
  color: var(--amber);
}

.page-faq .faq-beat-desc{
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-soft);
  max-width: 24em;
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-body{
  padding: clamp(44px,7vw,96px) 0 0;
}

.page-faq .faq-layout{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px,4vw,58px);
  align-items: start;
}

.page-faq .faq-rail{
  display: block;
}

.page-faq .faq-rail-title{
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-faq .faq-filter{
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.page-faq .faq-filter::-webkit-scrollbar{
  display: none;
}

.page-faq .faq-filter .filter-btn{
  appearance: none;
  flex: none;
  background: transparent;
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: .05em;
  line-height: 1.4;
  padding: 9px 14px;
  white-space: nowrap;
  cursor: pointer;
  text-align: left;
  transition: color .32s var(--ease), border-color .32s var(--ease), background .32s var(--ease);
}

.page-faq .faq-filter .filter-btn:hover{
  color: var(--paper);
  border-color: rgba(122,92,255,.66);
}

.page-faq .faq-filter .filter-btn[aria-pressed="true"]{
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.page-faq .faq-rail-hint{
  display: none;
  margin: 18px 0 0;
  font-size: 12px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 22em;
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-group{
  margin-bottom: clamp(40px,5.4vw,76px);
}

.page-faq .faq-group:last-child{
  margin-bottom: 0;
}

.page-faq .faq-group[hidden]{
  display: none;
}

.page-faq .faq-group-head{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--faq-line);
  margin-bottom: 6px;
}

.page-faq .faq-group-idx{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber);
  flex: none;
}

.page-faq .faq-group-title{
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(21px,2.5vw,30px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-group-sub{
  flex: 1 1 100%;
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-faq .faq-q{
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(18px,2.4vw,26px) 0;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  transition: color .32s var(--ease);
}

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

.page-faq .faq-q:hover{
  color: var(--cyan);
}

.page-faq .faq-q:focus-visible{
  outline: 2px solid var(--violet);
  outline-offset: 4px;
}

.page-faq .faq-q-num{
  flex: none;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--violet);
}

.page-faq .faq-q-text{
  flex: 1 1 auto;
  font-size: clamp(16px,1.7vw,19px);
  font-weight: 600;
  line-height: 1.7;
}

.page-faq .faq-q-mark{
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 9px;
  color: var(--muted);
}

.page-faq .faq-q:hover .faq-q-mark{
  color: var(--violet);
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after{
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform .32s var(--ease), opacity .32s var(--ease);
}

.page-faq .faq-q-mark::before{
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-q-mark::after{
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-q-mark::after{
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-a{
  margin: 0 0 clamp(18px,2.2vw,26px);
  padding: clamp(20px,2.6vw,32px) clamp(20px,3vw,38px);
  background: var(--paper);
  color: var(--black);
  border-left: 3px solid var(--amber);
  box-shadow: 8px 8px 0 rgba(63,232,200,.07);
}

.page-faq .faq-a p{
  margin: 0 0 .9em;
  font-family: var(--font-serif);
  font-size: clamp(15px,1.6vw,18px);
  line-height: 1.95;
}

.page-faq .faq-a p:last-child{
  margin-bottom: 0;
}

.page-faq .faq-a a{
  color: var(--amber-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-a a:hover{
  color: var(--violet);
}

/* ---------- 口径对照表 ---------- */

.page-faq .faq-table-wrap{
  overflow-x: auto;
  margin: 6px 0 2px;
}

.page-faq .faq-table{
  width: 100%;
  min-width: 320px;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 14px;
}

.page-faq .faq-table caption{
  text-align: left;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--amber-ink);
}

.page-faq .faq-table th,
.page-faq .faq-table td{
  padding: 11px 8px;
  border-bottom: 1px solid rgba(10,12,18,.14);
  text-align: left;
  vertical-align: baseline;
}

.page-faq .faq-table th{
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: #5B6379;
}

.page-faq .faq-table td.faq-td-num{
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  text-align: right;
}

/* ---------- 组内配图 ---------- */

.page-faq .faq-figure{
  margin: clamp(26px,3.4vw,44px) 0 0;
  padding: 8px;
  border: 1px solid var(--faq-line);
}

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

.page-faq .faq-figure--square{
  max-width: 520px;
}

/* ---------- 响应式 ---------- */

@media (max-width: 559px){
  .page-faq .faq-h1{
    font-size: clamp(30px,9vw,42px);
  }

  .page-faq .faq-a{
    box-shadow: none;
  }
}

@media (min-width: 720px){
  .page-faq .faq-beat-list{
    grid-template-columns: repeat(3, minmax(0,1fr));
  }
}

@media (min-width: 960px){
  .page-faq .faq-layout{
    grid-template-columns: minmax(210px, 236px) minmax(0, 1fr);
  }

  .page-faq .faq-rail{
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-filter{
    flex-wrap: wrap;
    flex-direction: column;
    align-items: stretch;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-filter .filter-btn{
    white-space: normal;
  }

  .page-faq .faq-rail-hint{
    display: block;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-faq .faq-q,
  .page-faq .faq-q-mark::before,
  .page-faq .faq-q-mark::after,
  .page-faq .faq-filter .filter-btn,
  .page-faq .faq-bread a{
    transition: none !important;
  }
}