.page-faq {
  --faq-num-col: 2.4em;
  --faq-gap: 12px;
  overflow-wrap: break-word;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 36px 0 30px;
  isolation: isolate;
}

.page-faq .faq-hero__glow {
  position: absolute;
  inset: -30% -10% auto -10%;
  height: 150%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(48% 52% at 10% 20%, rgba(35, 229, 213, .16), transparent 68%),
    radial-gradient(44% 48% at 94% 44%, rgba(255, 107, 44, .13), transparent 70%);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 24px;
}

.page-faq .faq-hero__intro {
  min-width: 0;
}

.page-faq .faq-hero__intro .display-title {
  margin: 12px 0 0;
  line-height: 1.05;
}

.page-faq .faq-hero__intro .lede {
  margin: 18px 0 0;
  max-width: 62ch;
}

/* 速览数据 */
.page-faq .faq-glance {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  align-self: start;
}

.page-faq .faq-glance__cell {
  min-width: 0;
  padding: 16px 14px;
  background: linear-gradient(180deg, rgba(19, 30, 61, .92), rgba(12, 20, 48, .92));
}

.page-faq .faq-glance__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-glance__num--gold { color: var(--gold); }
.page-faq .faq-glance__num--cyan { color: var(--cyan); }

.page-faq .faq-glance__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 问答工作台 ---------- */
.page-faq .faq-desk {
  padding-top: 12px;
}

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

.page-faq .faq-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-tabs .tab {
  flex: 0 0 auto;
  appearance: none;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(12, 20, 48, .72);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: color .22s var(--ease), background .22s var(--ease),
              border-color .22s var(--ease), box-shadow .22s var(--ease);
}

.page-faq .faq-tabs .tab:hover {
  color: var(--white);
  border-color: rgba(35, 229, 213, .5);
}

.page-faq .faq-tabs .tab[aria-selected="true"] {
  color: var(--ink-0);
  background: linear-gradient(135deg, var(--cyan), #7ff3ea);
  border-color: var(--cyan);
  box-shadow: 0 6px 22px rgba(35, 229, 213, .28);
}

.page-faq .faq-tabs > .tabpanel {
  width: 100%;
  min-width: 0;
  margin-top: 22px;
}

.page-faq .faq-tabs > .tabpanel[hidden] {
  display: none;
}

.page-faq .faq-tabs > .tabpanel:not([hidden]) {
  animation: faq-panel .3s var(--ease);
}

@keyframes faq-panel {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-group {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(19, 30, 61, .78), rgba(12, 20, 48, .88));
  overflow: hidden;
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(35, 229, 213, .34);
}

.page-faq .faq-item:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(35, 229, 213, .18);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 18px 20px;
  border: 0;
  background: none;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
}

.page-faq .faq-q__num {
  flex: 0 0 auto;
  min-width: var(--faq-num-col);
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-faq .faq-q__text {
  min-width: 0;
}

.page-faq .faq-q::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--cyan);
  transition: color .22s var(--ease);
}

.page-faq .faq-q[aria-expanded="true"]::after {
  content: "−";
  color: var(--gold);
}

.page-faq .faq-a {
  padding: 0 20px 20px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .faq-a > p {
  margin: 0;
  max-width: 68ch;
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-a[data-open] {
  animation: faq-reveal .26s var(--ease);
}

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

/* ---------- 图figure ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
  box-shadow: var(--shadow);
}

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

.page-faq .faq-figure__cap {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: rgba(12, 20, 48, .72);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 兜底出口 ---------- */
.page-faq .faq-help {
  padding: 56px 0 88px;
}

.page-faq .faq-help__box {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 30px 22px;
  border-radius: var(--radius);
}

.page-faq .faq-help__text .h2 {
  margin: 0;
}

.page-faq .faq-help__text p {
  margin: 14px 0 0;
  max-width: 56ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.78;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.page-faq .faq-help__note {
  flex: 1 1 100%;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(19, 30, 61, .82);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.4;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .copy-chip:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .copy-chip__flag {
  display: inline-block;
  max-width: 0;
  overflow: hidden;
  white-space: nowrap;
  opacity: 0;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--cyan);
  transition: max-width .24s var(--ease), opacity .2s var(--ease);
}

.page-faq .copy-chip[data-copied] .copy-chip__flag {
  max-width: 64px;
  opacity: 1;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-a {
    padding-left: calc(20px + var(--faq-num-col) + 14px);
  }
  .page-faq .faq-figure {
    margin-top: 26px;
  }
}

@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: 52px 0 38px;
  }
  .page-faq .faq-tabs .tab {
    font-size: 15.5px;
    padding: 11px 22px;
  }
  .page-faq .faq-tabs > .tabpanel {
    margin-top: 28px;
  }
  .page-faq .faq-help {
    padding: 72px 0 104px;
  }
  .page-faq .faq-help__box {
    padding: 40px 36px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    gap: 52px;
    align-items: end;
  }
  .page-faq .faq-glance {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-faq .faq-glance__cell {
    padding: 18px 20px;
  }
  .page-faq .faq-glance__num {
    font-size: 28px;
  }
  .page-faq .faq-group {
    gap: 14px;
  }
  .page-faq .faq-help__box {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: center;
    gap: 44px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-tabs > .tabpanel {
    margin-top: 32px;
  }
  .page-faq .faq-a > p {
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tabs > .tabpanel:not([hidden]),
  .page-faq .faq-a[data-open] {
    animation: none;
  }
  .page-faq .faq-tabs .tab,
  .page-faq .faq-item,
  .page-faq .faq-q::after,
  .page-faq .copy-chip,
  .page-faq .copy-chip__flag {
    transition: none;
  }
}