.page-faq {
  --faq-spine-w: 236px;
  --faq-paper-line: rgba(26, 18, 13, .14);
  position: relative;
  padding-bottom: clamp(56px, 8vw, 104px);
  color: var(--text);
  background:
    radial-gradient(760px 420px at 86% -8%, rgba(53, 230, 224, .13), transparent 62%),
    radial-gradient(560px 420px at 2% 26%, rgba(242, 184, 75, .07), transparent 60%);
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--text-dim);
}

.page-faq .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-strong);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(24px, 4vw, 44px) 0 clamp(28px, 5vw, 56px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
  align-items: end;
}

.page-faq .faq-hero__copy {
  position: relative;
  padding: clamp(22px, 4vw, 44px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, rgba(14, 44, 85, .78), rgba(7, 21, 46, .92));
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-hero__copy::before,
.page-faq .faq-hero__copy::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  opacity: .7;
}

.page-faq .faq-hero__copy::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: var(--radius-lg);
}

.page-faq .faq-hero__copy::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
  border-bottom-right-radius: var(--radius-lg);
}

.page-faq .faq-hero .eyebrow {
  color: var(--amber);
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 5.2vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 46ch;
  color: var(--text-dim);
  font-size: clamp(.95rem, 1.4vw, 1.05rem);
  line-height: 1.8;
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 14px;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__facts li {
  padding-top: 10px;
  border-top: 1px solid var(--line-strong);
}

.page-faq .fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 700;
  color: var(--amber);
  line-height: 1.2;
}

.page-faq .fact-label {
  display: block;
  margin-top: 4px;
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--text-dim);
}

.page-faq .faq-hero__figure {
  margin: 0;
  position: relative;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: var(--glow-cyan);
}

.page-faq .faq-hero__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--haze);
}

/* ---------- 三个高频方向 ---------- */
.page-faq .faq-quick {
  padding: clamp(26px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-quick .section-head {
  max-width: 62ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-quick .section-head h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-quick .section-head .lede {
  margin: 10px 0 0;
  color: var(--text-dim);
  font-size: .96rem;
  line-height: 1.8;
}

.page-faq .faq-quick__grid {
  display: grid;
  gap: 14px;
}

.page-faq .quick-card {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(155deg, rgba(14, 44, 85, .9), rgba(7, 21, 46, .76));
  color: var(--text);
  text-decoration: none;
  transition: transform .45s var(--ease), border-color .45s var(--ease), box-shadow .45s var(--ease);
}

.page-faq .quick-card:hover,
.page-faq .quick-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--glow-cyan);
}

.page-faq .quick-card__idx {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-faq .quick-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.02rem, 1.8vw, 1.18rem);
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .quick-card__text {
  font-size: .9rem;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .quick-card__go {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--cyan);
}

/* ---------- 主体：书脊目录 + 问答 ---------- */
.page-faq .faq-body {
  padding-top: clamp(20px, 4vw, 44px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-spine {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(10, 29, 60, .55);
}

.page-faq .faq-spine__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-spine__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-faq .faq-spine__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: .92rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}

.page-faq .faq-spine__link span:first-child {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--amber);
}

.page-faq .faq-spine__link:hover,
.page-faq .faq-spine__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-strong);
}

.page-faq .faq-spine__figure {
  margin: 16px 0 0;
}

.page-faq .faq-spine__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.page-faq .faq-spine__caption {
  margin-top: 8px;
  font-size: .74rem;
  line-height: 1.6;
  color: var(--haze);
}

.page-faq .faq-spine__meta {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(18px, 3vw, 28px);
}

.page-faq .faq-chapter {
  padding-top: clamp(24px, 4vw, 40px);
  margin-top: clamp(24px, 4vw, 40px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--topbar-h) + 20px);
}

.page-faq .faq-list > .faq-chapter:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-chapter__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.24rem, 2.6vw, 1.72rem);
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .faq-chapter__note {
  max-width: 62ch;
  margin: 0 0 18px;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .qa-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  border: 1px solid var(--faq-paper-line);
  border-radius: var(--radius-md);
  background: var(--paper);
  color: var(--brown);
  overflow: hidden;
  transition: border-color .35s var(--ease), box-shadow .35s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(53, 230, 224, .55);
  box-shadow: 0 18px 42px -32px rgba(2, 9, 20, .95);
}

.page-faq .qa__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 16px clamp(16px, 3vw, 22px);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(.98rem, 1.6vw, 1.06rem);
  line-height: 1.55;
  cursor: pointer;
  list-style: none;
  color: var(--brown);
}

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

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

.page-faq .qa__idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 400;
  color: var(--ember);
}

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

.page-faq .qa__sign {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  flex: none;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--brown);
  border-radius: 2px;
  transition: transform .32s var(--ease), background .32s var(--ease);
}

.page-faq .qa__sign::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 2px;
}

.page-faq .qa__sign::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
}

.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
}

.page-faq .qa[open] .qa__sign::before {
  background: var(--ember);
}

.page-faq .qa[open] > .qa__head {
  border-bottom: 1px dashed rgba(26, 18, 13, .22);
}

.page-faq .qa__body {
  padding: 14px clamp(16px, 3vw, 22px) clamp(16px, 3vw, 22px);
  font-family: var(--font-body);
  font-size: .94rem;
  line-height: 1.8;
  color: #2b201a;
}

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

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

.page-faq .qa__path {
  display: inline-block;
  margin: 2px 0 12px;
  padding: 7px 12px;
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  background: rgba(14, 44, 85, .09);
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .02em;
  color: #0E2C55;
}

.page-faq .qa__steps {
  margin: 6px 0 10px;
  padding-left: 1.2em;
}

.page-faq .qa__steps li {
  margin-bottom: 6px;
}

.page-faq .qa__steps li::marker {
  font-family: var(--font-mono);
  color: var(--ember);
}

.page-faq .qa__note {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid rgba(26, 18, 13, .12);
  font-size: .86rem;
  line-height: 1.75;
  color: #5c4a3c;
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-support {
  margin-top: clamp(40px, 7vw, 84px);
  scroll-margin-top: calc(var(--topbar-h) + 20px);
}

.page-faq .faq-support .wrap {
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(14, 44, 85, .88), rgba(7, 21, 46, .95));
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-support__head {
  max-width: 62ch;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-support__head .eyebrow {
  color: var(--amber);
}

.page-faq .faq-support__head h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.42rem, 3vw, 2.05rem);
  line-height: 1.32;
  color: var(--paper);
}

.page-faq .faq-support__head .lede {
  margin: 10px 0 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-support__grid {
  display: grid;
  gap: 14px;
}

.page-faq .support-card {
  display: grid;
  align-content: start;
  gap: 6px;
  padding: clamp(16px, 3vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(7, 21, 46, .58);
}

.page-faq .support-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .support-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--paper);
}

.page-faq .support-card__value {
  margin: 2px 0 4px;
  font-family: var(--font-mono);
  font-size: .9rem;
  line-height: 1.6;
  color: var(--amber);
  overflow-wrap: anywhere;
}

.page-faq .support-card__text {
  margin: 0 0 6px;
  font-size: .88rem;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .support-card .copy-btn {
  justify-self: start;
  margin-top: 4px;
}

.page-faq .faq-support__meta {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .74rem;
  line-height: 1.9;
  letter-spacing: .04em;
  color: var(--haze);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-quick__grid .quick-card:nth-child(2) {
    margin-top: 16px;
  }

  .page-faq .faq-quick__grid .quick-card:nth-child(3) {
    margin-top: 32px;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-spine-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-spine {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
    align-self: start;
  }
}

@media (max-width: 599px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }

  .page-faq .fact-num {
    font-size: 1.15rem;
  }

  .page-faq .fact-label {
    font-size: .72rem;
  }

  .page-faq .faq-spine {
    padding: 14px;
  }

  .page-faq .qa__body {
    font-size: .9rem;
  }

  .page-faq .qa__path {
    font-size: .74rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation: none !important;
    transition-duration: .01ms !important;
  }

  .page-faq .quick-card:hover,
  .page-faq .quick-card:focus-visible {
    transform: none;
  }
}