.page-faq {
  --faq-line: rgba(122, 92, 255, 0.32);
  --faq-line-soft: rgba(233, 236, 248, 0.1);
  --faq-card: rgba(255, 255, 255, 0.045);
  display: block;
  position: relative;
  padding-bottom: clamp(56px, 8vw, 100px);
  color: var(--text);
  font-family: var(--font-body);
  background:
    radial-gradient(1100px 560px at 88% -6%, rgba(122, 92, 255, 0.2), transparent 62%),
    radial-gradient(820px 480px at 2% 14%, rgba(53, 230, 208, 0.11), transparent 66%),
    var(--ink-900);
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq a:hover,
.page-faq a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .eyebrow {
  margin: 0 0 10px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--font-display);
  letter-spacing: 0.04em;
  color: var(--text);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(26px, 5vw, 56px) 0 clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__frame {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 52px) clamp(20px, 4vw, 52px);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background:
    radial-gradient(700px 320px at 100% 0%, rgba(255, 61, 154, 0.14), transparent 66%),
    linear-gradient(152deg, rgba(11, 16, 38, 0.94), rgba(5, 6, 15, 0.72));
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--stroke), transparent);
}

.page-faq .faq-hero__frame::before { top: 14px; }
.page-faq .faq-hero__frame::after { bottom: 14px; }

.page-faq h1 {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(34px, 6.2vw, 68px);
  line-height: 1.1;
  font-weight: 700;
}

.page-faq .faq-hero__lead {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-hero__hint {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 场景索引 ---------- */

.page-faq .faq-index {
  position: relative;
  overflow: hidden;
  margin-top: clamp(24px, 4vw, 48px);
  padding: clamp(30px, 5vw, 58px) 0 clamp(34px, 5vw, 62px);
  border-top: 1px solid var(--faq-line-soft);
  border-bottom: 1px solid var(--faq-line-soft);
  background: var(--ink-800);
}

.page-faq .faq-index__art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
  pointer-events: none;
}

.page-faq .faq-index::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 16, 38, 0.72), rgba(11, 16, 38, 0.94));
  pointer-events: none;
}

.page-faq .faq-index__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-index__head h2 {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.25;
}

.page-faq .faq-index__grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-faq .faq-index__card {
  display: grid;
  gap: 8px;
  padding: 22px 20px 20px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(122, 92, 255, 0.18), rgba(5, 6, 15, 0.86) 62%);
  color: var(--text);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-faq .faq-index__card:nth-child(2) {
  background: linear-gradient(158deg, rgba(255, 61, 154, 0.16), rgba(5, 6, 15, 0.86) 62%);
}

.page-faq .faq-index__card:nth-child(3) {
  background: linear-gradient(158deg, rgba(53, 230, 208, 0.16), rgba(5, 6, 15, 0.86) 62%);
}

.page-faq .faq-index__card:hover,
.page-faq .faq-index__card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--cyan);
  box-shadow: 0 14px 32px rgba(53, 230, 208, 0.12);
  text-decoration: none;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--text-dim);
}

.page-faq .faq-index__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2vw, 23px);
  letter-spacing: 0.04em;
  color: var(--text);
}

.page-faq .faq-index__desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-index__go {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-index__go::after {
  content: " →";
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding: clamp(42px, 7vw, 84px) 0 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 2.4vw, 30px);
  align-items: flex-start;
  margin-bottom: clamp(22px, 3.4vw, 36px);
  padding-bottom: clamp(16px, 2.4vw, 26px);
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-group__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(46px, 7.6vw, 96px);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: 0.02em;
  color: var(--purple);
}

@supports (-webkit-text-stroke: 1px black) {
  .page-faq .faq-group__no {
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(122, 92, 255, 0.75);
  }
}

.page-faq .faq-group__meta {
  flex: 1 1 320px;
  min-width: 0;
}

.page-faq .faq-group__meta h2 {
  margin: 0;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.2;
}

.page-faq .faq-group__lead {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 问答条目 ---------- */

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

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

.page-faq .faq-item__heading {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
}

.page-faq .faq-item__btn {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: start;
  width: 100%;
  padding: 22px 0 22px 0;
  border: 0;
  background: none;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-faq .faq-item__btn::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 20px;
  bottom: 20px;
  width: 2px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

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

.page-faq .faq-item__no {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-item__q {
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.45;
  letter-spacing: 0.03em;
  color: var(--text);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-item__btn .disclosure__icon {
  flex: 0 0 auto;
  margin-top: 2px;
  color: var(--text-dim);
  transition: transform 0.22s var(--ease), color 0.22s var(--ease);
}

.page-faq .faq-item__btn[aria-expanded="true"]::before {
  opacity: 1;
}

.page-faq .faq-item__btn[aria-expanded="true"] .faq-item__no {
  color: var(--cyan);
}

.page-faq .faq-item__btn[aria-expanded="true"] .disclosure__icon {
  transform: rotate(90deg);
  color: var(--cyan);
}

.page-faq .faq-item__body {
  max-width: 68ch;
  padding: 0 0 24px 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

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

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

.page-faq .faq-item:has(.faq-item__btn[aria-expanded="true"]) .faq-item__body {
  padding-left: 16px;
  border-left: 1px solid rgba(53, 230, 208, 0.32);
}

/* ---------- 排查流程 ---------- */

.page-faq .faq-flow {
  display: grid;
  gap: 20px;
  align-items: center;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: var(--glass);
}

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

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

.page-faq .faq-flow__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 24px);
  letter-spacing: 0.04em;
  color: var(--text);
}

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

.page-faq .faq-flow__steps li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-flow__k {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--faq-line);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

/* ---------- 联系 ---------- */

.page-faq .faq-help {
  padding: clamp(46px, 7vw, 86px) 0 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-help__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 50px);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background:
    radial-gradient(620px 320px at 92% 0%, rgba(255, 61, 154, 0.16), transparent 64%),
    radial-gradient(520px 300px at 0% 100%, rgba(53, 230, 208, 0.12), transparent 66%),
    linear-gradient(160deg, rgba(11, 16, 38, 0.96), rgba(5, 6, 15, 0.88));
}

.page-faq .faq-help__panel h2 {
  margin: 0;
  max-width: 26ch;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.22;
}

.page-faq .faq-help__lead {
  margin: 14px 0 clamp(22px, 3vw, 32px);
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

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

.page-faq .faq-help__ch {
  padding: 22px 20px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius-sm);
  background: var(--faq-card);
}

.page-faq .faq-help__ch h3 {
  margin: 0 0 10px;
  font-size: 18px;
  letter-spacing: 0.04em;
}

.page-faq .faq-help__ch p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-help__meta {
  margin-top: 12px !important;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 12.5px !important;
  letter-spacing: 0.04em;
  color: var(--cyan) !important;
}

.page-faq .faq-help__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-flow {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .faq-item__btn {
    gap: 24px;
    padding: 26px 0;
  }

  .page-faq .faq-item__btn::before {
    left: -22px;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-item__btn {
    grid-template-columns: auto 1fr auto;
    gap: 10px;
  }

  .page-faq .faq-item__btn::before {
    left: -8px;
  }

  .page-faq .faq-help__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__card,
  .page-faq .faq-item__btn::before,
  .page-faq .faq-item__q,
  .page-faq .faq-item__no,
  .page-faq .disclosure__icon {
    transition: none;
  }

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