.page-faq {
  --faq-panel: rgba(12, 27, 51, .74);
  --faq-panel-soft: rgba(12, 27, 51, .5);
  --faq-gap: clamp(20px, 3.6vw, 40px);
  color: var(--arc-ice);
}

.page-faq .arc-crumbs {
  margin-top: 26px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 20px;
  padding: clamp(30px, 6vw, 68px) clamp(20px, 4vw, 52px) clamp(26px, 4vw, 46px);
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius-lg);
  background:
    radial-gradient(130% 110% at 100% 0%, rgba(124, 77, 255, .34), rgba(124, 77, 255, 0) 58%),
    radial-gradient(90% 90% at 0% 100%, rgba(52, 241, 211, .14), rgba(52, 241, 211, 0) 62%),
    linear-gradient(152deg, var(--arc-indigo) 0%, var(--arc-abyss) 58%, var(--arc-void) 100%);
  box-shadow: var(--arc-shadow);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(201, 216, 255, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 216, 255, .06) 1px, transparent 1px);
  background-size: 58px 58px;
  mask-image: linear-gradient(160deg, #000 0%, transparent 74%);
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 10px 0 18px;
  font-family: var(--arc-font-head);
  font-weight: 900;
  font-size: clamp(40px, 8.4vw, 96px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--arc-ice);
}

.page-faq .faq-hero__lede {
  max-width: 64ch;
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--arc-mist);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(24px, 4vw, 40px);
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius);
  background: var(--arc-line);
  overflow: hidden;
}

.page-faq .faq-stat {
  padding: 16px 20px;
  background: rgba(6, 12, 27, .8);
}

.page-faq .faq-stat__key {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--arc-mist);
}

.page-faq .faq-stat__val {
  margin: 6px 0 0;
  font-family: var(--arc-font-mono);
  font-size: clamp(20px, 3vw, 28px);
  color: var(--arc-cyan);
  line-height: 1.2;
}

/* ---------- 主题导航 ---------- */
.page-faq .faq-topics__head {
  max-width: 68ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-topics__head .arc-title {
  margin: 8px 0 12px;
}

.page-faq .faq-topics__rail {
  margin-bottom: clamp(22px, 3.4vw, 36px);
}

.page-faq .faq-topics__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(184px, 1fr);
  gap: 12px;
  padding-bottom: 6px;
}

.page-faq .faq-topic {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius);
  background: var(--faq-panel);
  box-shadow: var(--arc-shadow-sm);
  text-decoration: none;
  color: var(--arc-ice);
  transition: transform .18s var(--arc-ease), box-shadow .18s var(--arc-ease), border-color .18s var(--arc-ease);
}

.page-faq .faq-topic:hover,
.page-faq .faq-topic:focus-visible {
  transform: translate(4px, -4px);
  border-color: var(--arc-violet);
  box-shadow: var(--arc-shadow);
}

.page-faq .faq-topic__num {
  font-family: var(--arc-font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--arc-cyan);
}

.page-faq .faq-topic__name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-faq .faq-topic__count {
  font-family: var(--arc-font-mono);
  font-size: 12px;
  color: var(--arc-mist);
}

.page-faq .faq-topics__art {
  margin: 0;
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius-lg);
  background: var(--arc-teal);
  box-shadow: var(--arc-shadow);
  overflow: hidden;
}

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

.page-faq .faq-topics__art figcaption {
  padding: 14px 20px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--arc-mist);
  border-top: 2px solid var(--arc-line);
}

/* ---------- 高频问题 ---------- */
.page-faq .faq-quick__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius-lg);
  background: var(--arc-line);
  overflow: hidden;
}

.page-faq .faq-quick__item {
  position: relative;
  padding: 20px 22px 22px;
  background: var(--arc-abyss);
  transition: background .18s var(--arc-ease);
}

.page-faq .faq-quick__item:hover {
  background: #0F2244;
}

.page-faq .faq-quick__num {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--arc-cyan);
}

.page-faq .faq-quick__q {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--arc-ice);
}

.page-faq .faq-quick__a {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--arc-mist);
}

/* ---------- 双栏布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding-top: clamp(38px, 6vw, 76px);
  padding-bottom: clamp(46px, 7vw, 90px);
}

.page-faq .faq-index {
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius);
  background: var(--faq-panel-soft);
  padding: 18px 16px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--arc-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--arc-cyan);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 12px;
  border-left: 3px solid var(--arc-line);
  border-radius: 4px;
  color: var(--arc-mist);
  font-size: 14.5px;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .18s var(--arc-ease), color .18s var(--arc-ease), background .18s var(--arc-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--arc-cyan);
  background: rgba(52, 241, 211, .08);
  color: var(--arc-ice);
}

.page-faq .faq-index__num {
  font-family: var(--arc-font-mono);
  font-size: 11.5px;
  color: var(--arc-violet);
}

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

.page-faq .faq-index__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--arc-mist);
}

.page-faq .faq-canvas {
  display: grid;
  gap: clamp(32px, 5vw, 58px);
  min-width: 0;
}

/* ---------- 分组与折叠条目 ---------- */
.page-faq .faq-block {
  scroll-margin-top: 120px;
}

.page-faq .faq-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--arc-line);
}

.page-faq .faq-block__num {
  font-family: var(--arc-font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--arc-cyan);
}

.page-faq .faq-block__head .arc-title {
  margin: 0;
}

.page-faq .faq-acc {
  display: grid;
  gap: 12px;
}

.page-faq .faq-acc .arc-acc__item {
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius);
  background: var(--faq-panel);
  overflow: hidden;
  transition: border-color .18s var(--arc-ease), box-shadow .18s var(--arc-ease), background .18s var(--arc-ease);
}

.page-faq .faq-acc .arc-acc__item:hover {
  border-color: var(--arc-line-strong);
}

.page-faq .faq-acc .arc-acc__item[data-open="true"] {
  border-color: var(--arc-violet);
  background: rgba(36, 19, 86, .5);
  box-shadow: var(--arc-shadow-sm);
}

.page-faq .faq-acc .arc-acc__btn {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 17px 20px;
  border: 0;
  background: none;
  color: var(--arc-ice);
  font-family: var(--arc-font-head);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color .18s var(--arc-ease);
}

.page-faq .faq-acc .arc-acc__btn::before {
  content: "";
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin-top: 9px;
  border-radius: 3px;
  background: var(--arc-violet);
  transition: background .18s var(--arc-ease), transform .18s var(--arc-ease);
}

.page-faq .faq-acc .arc-acc__btn:hover::before,
.page-faq .faq-acc .arc-acc__btn:focus-visible::before {
  background: var(--arc-cyan);
}

.page-faq .faq-acc .arc-acc__item[data-open="true"] .arc-acc__btn::before {
  background: var(--arc-cyan);
  transform: rotate(45deg);
}

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

.page-faq .faq-q__num {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--arc-mist);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-acc .arc-acc__panel {
  padding: 0 20px 20px 45px;
  border-top: 1px dashed var(--arc-line);
  margin-top: 2px;
  padding-top: 16px;
}

.page-faq .faq-answer {
  margin: 0 0 12px;
  font-size: 17.5px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--arc-ice);
}

.page-faq .faq-steps {
  margin: 0;
  padding-left: 1.45em;
  list-style: decimal;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--arc-mist);
}

.page-faq .faq-steps li + li {
  margin-top: 6px;
}

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

/* ---------- 流程插图 ---------- */
.page-faq .faq-flow {
  margin: 0;
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius-lg);
  background: linear-gradient(150deg, var(--arc-wine) 0%, var(--arc-abyss) 78%);
  box-shadow: var(--arc-shadow);
  overflow: hidden;
}

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

.page-faq .faq-flow figcaption {
  padding: 14px 20px 16px;
  border-top: 2px solid var(--arc-line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--arc-mist);
}

/* ---------- 结尾行动 ---------- */
.page-faq .faq-cta {
  scroll-margin-top: 120px;
}

.page-faq .faq-cta__panel {
  position: relative;
  padding: clamp(26px, 4.4vw, 48px) clamp(20px, 3.6vw, 44px);
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius-lg);
  background:
    radial-gradient(110% 120% at 0% 0%, rgba(124, 77, 255, .3), rgba(124, 77, 255, 0) 60%),
    linear-gradient(160deg, var(--arc-wine) 0%, var(--arc-abyss) 72%);
  box-shadow: var(--arc-shadow);
  overflow: hidden;
}

.page-faq .faq-cta__panel .arc-title {
  margin: 8px 0 14px;
}

.page-faq .faq-cta__lede {
  max-width: 62ch;
  margin: 0 0 22px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--arc-mist);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.page-faq .faq-cta__meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  border: 2px solid var(--arc-line);
  border-radius: var(--arc-radius);
  background: var(--arc-line);
  overflow: hidden;
}

.page-faq .faq-cta__meta-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 14px 18px;
  background: rgba(6, 12, 27, .74);
}

.page-faq .faq-cta__key {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--arc-mist);
}

.page-faq .faq-cta__val {
  font-size: 16px;
  font-weight: 700;
  color: var(--arc-gold);
}

.page-faq .faq-cta .arc-note {
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-quick__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-faq .faq-topics__track {
    grid-auto-flow: row;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    grid-auto-columns: auto;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-topic {
    padding: 18px 16px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    width: 100%;
    white-space: normal;
    padding: 10px 12px;
  }

  .page-faq .faq-acc .arc-acc__btn {
    font-size: 17.5px;
    padding: 20px 24px;
  }

  .page-faq .faq-acc .arc-acc__panel {
    padding: 18px 24px 24px 49px;
  }

  .page-faq .faq-block__head {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-topics__art {
    max-width: 1200px;
  }

  .page-faq .faq-flow {
    max-width: 1000px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-topic,
  .page-faq .faq-topic:hover,
  .page-faq .faq-index__link,
  .page-faq .faq-acc .arc-acc__btn::before,
  .page-faq .faq-acc .arc-acc__item {
    transform: none;
    transition: color .15s linear, background-color .15s linear, border-color .15s linear;
  }
}