.page-faq {
  --faq-line: rgba(29, 59, 87, .78);
  --faq-line-soft: rgba(29, 59, 87, .45);
  --faq-glow: rgba(47, 216, 206, .14);
  --faq-panel: rgba(16, 36, 57, .62);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-top {
  position: relative;
  overflow: hidden;
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-top::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 18%, rgba(47, 216, 206, .13), transparent 58%),
    radial-gradient(circle at 10% 86%, rgba(126, 107, 255, .11), transparent 55%);
  pointer-events: none;
}

.page-faq .faq-top .container {
  position: relative;
}

.page-faq .faq-top__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: end;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-top__lede h1 {
  margin: .7rem 0 1.2rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 3.8rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-faq .faq-top__lede .lead {
  max-width: 46ch;
  color: var(--mist);
}

.page-faq .faq-top__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.75rem;
}

.page-faq .faq-top__figure {
  margin: 0;
}

.page-faq .faq-top__figure .figure__frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-top__figure figcaption {
  margin-top: .85rem;
  font-size: .82rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 场景跳转条 ---------- */
.page-faq .faq-jump {
  position: sticky;
  top: calc(var(--header-h) + .5rem);
  z-index: 6;
  margin-top: clamp(1.75rem, 5vw, 2.75rem);
}

.page-faq .faq-jump__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem .6rem;
  padding: .7rem clamp(.9rem, 2.4vw, 1.35rem);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-pill);
  background: rgba(10, 23, 40, .9);
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .3);
}

.page-faq .faq-jump__label {
  color: var(--gold);
  flex: 0 0 auto;
}

.page-faq .faq-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__list a {
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-jump__list a:hover,
.page-faq .faq-jump__list a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--faq-glow);
}

/* ---------- 问答组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 6.5rem);
}

.page-faq .faq-group__head {
  display: grid;
  gap: .45rem;
  padding-bottom: 1rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  border-bottom: 3px double var(--faq-line);
}

.page-faq .faq-group__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 62ch;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 可展开条目 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-line-soft);
}

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

.page-faq .faq-item__h {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-item__btn {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .4rem .95rem;
  align-items: start;
  padding: 1.15rem 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--white);
  font-family: var(--font-display);
  font-size: clamp(.98rem, 1.6vw, 1.08rem);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: -.01em;
  transition: color .2s var(--ease);
}

.page-faq .faq-item__btn:hover,
.page-faq .faq-item__btn:focus-visible {
  color: var(--cyan);
}

.page-faq .expand__code {
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--mist);
  padding-top: .3em;
  min-width: 2.4rem;
}

.page-faq .expand__sign {
  width: 0;
  height: 0;
  margin-top: .62em;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--cyan);
  transition: transform .24s var(--ease);
}

.page-faq .expand__btn[aria-expanded="true"] .expand__sign,
.page-faq .expand[data-open] .expand__sign {
  transform: rotate(180deg);
}

.page-faq .expand__panel-inner {
  padding: 0 0 1.5rem 3.35rem;
  max-width: 68ch;
  font-family: var(--font-body);
  font-size: .95rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .expand__panel-inner p {
  margin: 0 0 .7rem;
}

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

.page-faq .faq-steps {
  margin: .6rem 0 .9rem;
  padding-left: 1.15rem;
  display: grid;
  gap: .45rem;
}

.page-faq .faq-steps li::marker {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .8rem;
}

.page-faq .faq-marks {
  margin: .7rem 0 .4rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .55rem;
}

.page-faq .faq-marks li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}

.page-faq .faq-ref {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  margin-top: .8rem !important;
  padding: .4rem .75rem;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
  background: var(--faq-panel);
  font-family: var(--font-display);
  font-size: .78rem;
  line-height: 1.6;
}

.page-faq .faq-ref a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 216, 206, .38);
}

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

/* ---------- 三步排查 ---------- */
.page-faq .faq-flow {
  scroll-margin-top: calc(var(--header-h) + 6.5rem);
}

.page-faq .faq-flow__head {
  display: grid;
  gap: .55rem;
  max-width: 60ch;
}

.page-faq .faq-flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-faq .faq-flow__note {
  margin: 0;
  font-family: var(--font-body);
  font-size: .95rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-flow__figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

.page-faq .faq-flow__figure .figure__frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-flow__list {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.25rem);
  counter-reset: none;
}

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

.page-faq .faq-flow__num {
  display: block;
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: transparent;
  -webkit-text-stroke: 1px var(--cyan);
  margin-bottom: .7rem;
}

.page-faq .faq-flow__item h3 {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.8vw, 1.12rem);
  line-height: 1.45;
  color: var(--white);
}

.page-faq .faq-flow__item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 提问准备 ---------- */
.page-faq .faq-ask {
  scroll-margin-top: calc(var(--header-h) + 6.5rem);
}

.page-faq .faq-ask__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3rem);
  align-items: start;
}

.page-faq .faq-ask__title {
  margin: .55rem 0 .7rem;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-faq .faq-ask__desc {
  margin: 0 0 1.5rem;
  max-width: 54ch;
  font-family: var(--font-body);
  font-size: .95rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-prep__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--faq-line-soft);
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-faq .faq-prep__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .9rem;
  padding: 1rem 1.1rem;
  background: var(--ink-900);
}

.page-faq .faq-prep__k {
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--gold);
  padding-top: .25em;
}

.page-faq .faq-prep__item h3 {
  margin: 0 0 .3rem;
  font-family: var(--font-display);
  font-size: .98rem;
  line-height: 1.45;
  color: var(--white);
}

.page-faq .faq-prep__item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-ask__card {
  position: relative;
  border: 1px solid var(--gold);
  border-radius: var(--radius-md);
}

.page-faq .faq-ask__card .card__code {
  color: var(--gold);
  letter-spacing: .16em;
  font-size: .72rem;
}

.page-faq .faq-ask__pre {
  margin: 1rem 0 1.25rem;
  padding: .9rem 1rem;
  font-size: .82rem;
  line-height: 2;
  color: var(--white);
  background: rgba(10, 23, 40, .72);
  border: 1px dashed var(--faq-line);
  border-radius: var(--radius-sm);
  white-space: pre-wrap;
  overflow-x: auto;
}

.page-faq .faq-ask__copy {
  width: 100%;
}

.page-faq .faq-ask__copy.is-copied {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .faq-ask__card .card__foot {
  margin-top: .85rem;
  font-size: .8rem;
  color: var(--mist);
}

/* ---------- 联系 ---------- */
.page-faq .faq-reach {
  scroll-margin-top: calc(var(--header-h) + 6.5rem);
}

.page-faq .faq-reach__title {
  margin: .55rem 0 .8rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-faq .faq-reach__desc {
  margin: 0 0 1.85rem;
  max-width: 66ch;
  font-family: var(--font-body);
  font-size: .98rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-reach__list {
  max-width: 640px;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  padding: .35rem 0;
}

.page-faq .faq-reach__list .contact-list__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .85rem;
  padding: .75rem 0;
}

.page-faq .faq-reach__list .contact-list__key {
  flex: 0 0 auto;
  min-width: 5.5rem;
  font-family: var(--font-display);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-faq .faq-reach__list .contact-list__value {
  font-family: var(--font-mono);
  font-size: .9rem;
  color: var(--white);
  word-break: break-all;
}

.page-faq .faq-reach__list .contact-list__copy {
  cursor: pointer;
  margin-left: auto;
}

.page-faq .faq-reach__more {
  margin: 1.75rem 0 0;
  font-family: var(--font-body);
  font-size: .9rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-reach__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 216, 206, .38);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-top__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-ask__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

  .page-faq .faq-flow__item:nth-child(2) {
    margin-top: 1.5rem;
  }

  .page-faq .faq-flow__item:nth-child(3) {
    margin-top: 3rem;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-jump {
    position: static;
  }

  .page-faq .faq-jump__inner {
    border-radius: var(--radius-md);
    padding: .75rem .85rem;
  }

  .page-faq .faq-jump__list {
    gap: .4rem;
  }

  .page-faq .faq-jump__list a {
    white-space: normal;
  }

  .page-faq .faq-item__btn {
    grid-template-columns: auto 1fr auto;
    gap: .3rem .7rem;
  }

  .page-faq .expand__code {
    min-width: 2rem;
    font-size: .72rem;
  }

  .page-faq .expand__panel-inner {
    padding-left: 0;
  }

  .page-faq .faq-reach__list .contact-list__key {
    min-width: 100%;
  }

  .page-faq .faq-reach__list .contact-list__copy {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__btn,
  .page-faq .expand__sign,
  .page-faq .faq-jump__list a {
    transition: none;
  }
}