.page-faq{
  --faq-num: clamp(34px, 8vw, 58px);
  --faq-dash: rgba(47,227,200,.32);
  --faq-gap: clamp(16px, 2.4vw, 24px);
  --faq-inner: clamp(18px, 2.6vw, 30px);
  color: var(--text);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-hero{
  max-width: 940px;
  padding-top: clamp(24px, 4.5vw, 52px);
}

.page-faq .faq-hero h1{
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(27px, 5.2vw, 42px);
  line-height: 1.22;
  color: var(--text);
}

.page-faq .faq-hero .lead{
  margin: 18px 0 0;
  max-width: 70ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-hero__facts{
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-hero__facts li{
  background: var(--rail-bg);
  padding: 15px 16px 16px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-faq .faq-hero__facts .mono{
  display: block;
  margin-bottom: 6px;
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -.01em;
}

/* 章节跳转 */
.page-faq .topic-jump{
  position: sticky;
  top: 0;
  z-index: 5;
  margin-top: clamp(26px, 4vw, 42px);
  padding: 10px 0 8px;
  background: linear-gradient(180deg, rgba(7,11,20,.97) 62%, rgba(7,11,20,.78));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.page-faq .jump-list{
  list-style: none;
  margin: 0;
  padding: 0 2px 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .jump-list li{ flex: 0 0 auto; }

.page-faq .jump-list a{
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--text-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color .16s ease, border-color .16s ease, background-color .16s ease;
}

.page-faq .jump-list a:hover,
.page-faq .jump-list a:focus-visible{
  color: var(--text);
  border-color: var(--cyan);
  background: rgba(47,227,200,.06);
}

.page-faq .jump-num{
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--orange);
}

/* 区块骨架 */
.page-faq .guide-block{
  margin-top: clamp(44px, 7vw, 78px);
  scroll-margin-top: 76px;
}

.page-faq .guide-block .section-head__note{
  max-width: 62ch;
}

/* 上手步骤 */
.page-faq .flow-steps{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .flow-step{
  position: relative;
  padding: 18px 20px 18px calc(var(--faq-num) + 26px);
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--rail-bg);
  transition: border-color .18s ease, background-color .18s ease;
}

.page-faq .flow-step:hover,
.page-faq .flow-step:focus-within{
  border-color: rgba(47,227,200,.55);
  background: #101a2c;
}

.page-faq .flow-step:not(:last-child)::after{
  content: "";
  position: absolute;
  top: 100%;
  left: calc(16px + var(--faq-num) / 2);
  height: var(--faq-gap);
  border-left: 1px dashed var(--faq-dash);
}

.page-faq .flow-step__num{
  position: absolute;
  left: 14px;
  top: 12px;
  font-size: var(--faq-num);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -.04em;
  color: var(--cyan);
  opacity: .22;
  pointer-events: none;
}

.page-faq .flow-step__title{
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .flow-step p{
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

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

.page-faq .flow-step .flow-step__edge{
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-mute);
}

.page-faq .flow-step a{ color: var(--cyan); text-decoration: none; border-bottom: 1px solid rgba(47,227,200,.35); }
.page-faq .flow-step a:hover{ border-bottom-color: var(--cyan); }

/* 折叠问答 */
.page-faq .fold-set{
  display: grid;
  gap: 12px;
}

.page-faq .fee-folds{ margin-top: var(--faq-inner); }

.page-faq .faq-fold{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--slab);
  overflow: hidden;
}

.page-faq .faq-fold .fold__summary{
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 15px 18px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color .16s ease, background-color .16s ease;
}

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

.page-faq .faq-fold .fold__summary::before{
  content: "";
  flex: 0 0 auto;
  width: 0;
  height: 0;
  margin-top: 8px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid var(--orange);
  transition: transform .18s ease;
}

.page-faq .faq-fold[open] .fold__summary::before{ transform: rotate(180deg); }

.page-faq .faq-fold .fold__summary:hover{ background: rgba(47,227,200,.05); }

.page-faq .faq-fold[open] .fold__summary{ color: var(--cyan); }

.page-faq .faq-fold .fold__body{
  padding: 0 18px 18px 18px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-fold[open] .fold__body{
  margin-left: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-fold .fold__body p{ margin: 0 0 10px; }
.page-faq .faq-fold .fold__body p:last-child{ margin-bottom: 0; }

.page-faq .faq-fold .fold__body a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47,227,200,.35);
}

.page-faq .faq-fold .fold__body a:hover{ border-bottom-color: var(--cyan); }

/* DApp 导航 */
.page-faq .dapp-layout{
  display: grid;
  gap: var(--faq-inner);
  align-items: start;
}

.page-faq .dapp-copy{
  margin: var(--faq-inner) 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .dapp-paths{
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .dapp-paths li{
  padding: 3px 0 3px 16px;
  border-left: 2px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
  transition: border-color .16s ease;
}

.page-faq .dapp-paths li:hover{ border-left-color: var(--cyan); }

.page-faq .dapp-paths strong{ color: var(--text); font-weight: 700; }

.page-faq .dapp-side .paper a{
  color: var(--paper-ink);
  text-decoration: underline;
  text-decoration-style: dotted;
}

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

.page-faq .media__caption{
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-mute);
}

/* 备份 */
.page-faq .backup-media{ margin: 0 0 var(--faq-inner); }

.page-faq .backup-pair{
  display: grid;
  gap: 16px;
}

.page-faq .backup-card{
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--slab), var(--rail-bg));
  transition: border-color .18s ease;
}

.page-faq .backup-card:hover{ border-color: rgba(162,75,240,.55); }

.page-faq .backup-card__step{
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-faq .backup-card h3{
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .backup-card p{
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .backup-card .backup-card__edge{
  margin-bottom: 0;
  padding-left: 12px;
  border-left: 2px solid var(--errata);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-mute);
}

/* 手续费 */
.page-faq .fee-grid{
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-radius: 8px;
  overflow: hidden;
}

.page-faq .fee-cell{
  padding: 18px;
  background: var(--void);
}

.page-faq .fee-cell__value{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-faq .fee-cell__label{
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* 排错清单 */
.page-faq .trouble-list{
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line-soft);
  overflow: hidden;
}

.page-faq .trouble-row{
  display: grid;
  background: var(--rail-bg);
  transition: background-color .16s ease;
}

.page-faq .trouble-row:hover{ background: #101a2c; }

.page-faq .trouble-row__sym{
  margin: 0;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-editorial);
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  transition: color .16s ease;
}

.page-faq .trouble-row:hover .trouble-row__sym{ color: var(--cyan); }

.page-faq .trouble-row__fix{
  padding: 14px 18px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .trouble-row__fix p{ margin: 0; }

.page-faq .trouble-row__fix .mono{
  margin-right: 4px;
  color: var(--orange);
}

.page-faq .trouble-row__fix a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47,227,200,.35);
}

.page-faq .trouble-row__fix a:hover{ border-bottom-color: var(--cyan); }

/* 边界 */
.page-faq .limits-callout{
  margin-bottom: var(--faq-inner);
}

.page-faq .limits-grid{
  display: grid;
  gap: var(--faq-inner);
}

.page-faq .limits-col h3{
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .limits-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .limits-list li{
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .limits-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--violet);
}

.page-faq .limits-list a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47,227,200,.35);
}

.page-faq .limits-list a:hover{ border-bottom-color: var(--cyan); }

/* 平板与桌面 */
@media (min-width: 720px){
  .page-faq .backup-pair{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .fee-grid{ grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-faq .limits-grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .page-faq .trouble-row{ grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); }

  .page-faq .trouble-row__sym{
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
    padding: 16px 20px;
  }

  .page-faq .trouble-row__fix{ padding: 16px 20px; }
}

@media (min-width: 980px){
  .page-faq .dapp-layout{
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
  }

  .page-faq .flow-step{
    padding: 22px 26px 22px calc(var(--faq-num) + 34px);
  }

  .page-faq .flow-step__num{ left: 20px; top: 16px; }

  .page-faq .flow-step:not(:last-child)::after{
    left: calc(20px + var(--faq-num) / 2);
  }
}

@media (prefers-reduced-motion: reduce){
  .page-faq .jump-list a,
  .page-faq .flow-step,
  .page-faq .faq-fold .fold__summary::before,
  .page-faq .trouble-row,
  .page-faq .dapp-paths li,
  .page-faq .backup-card{
    transition: none;
  }
}