.page-faq {
  --faq-rule: rgba(140, 135, 168, .26);
  --faq-line: var(--ink-700);
}

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 4px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(55, 224, 216, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(55, 224, 216, .07) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
  padding-bottom: 22px;
}

.page-faq .breadcrumb {
  margin-bottom: 16px;
}

.page-faq .faq-hero__title {
  margin-top: 8px;
}

.page-faq .faq-hero__lede {
  margin-top: 14px;
  max-width: 56ch;
}

/* 索引面板 */
.page-faq .faq-index {
  border: 1px solid var(--ink-700);
  background: linear-gradient(158deg, rgba(27, 46, 78, .92), rgba(16, 32, 60, .96));
  padding: 16px;
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-index__head {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--paper-100);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 8px;
  align-items: baseline;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  color: var(--paper-100);
  font-size: .875rem;
  line-height: 1.5;
  text-decoration: none;
  transition: background var(--dur-micro) var(--ease), border-color var(--dur-micro) var(--ease);
}

.page-faq .faq-index__link .mono {
  color: var(--slate-500);
  font-size: .75rem;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(55, 224, 216, .08);
  border-left-color: var(--cyan-400);
}

.page-faq .faq-index__link:hover .mono,
.page-faq .faq-index__link:focus-visible .mono {
  color: var(--cyan-400);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--ink-700);
  font-size: .75rem;
  line-height: 1.7;
  color: var(--slate-500);
}

/* 问题区 */
.page-faq .faq-list {
  padding-top: 10px;
}

.page-faq .faq-tools {
  display: grid;
  gap: 6px;
  margin-bottom: 16px;
}

.page-faq .faq-tools__note {
  margin: 0;
  font-size: .8125rem;
}

.page-faq .faq-filter {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .filter-bar__input {
  width: 100%;
}

.page-faq .filter-bar__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--slate-500);
}

.page-faq .faq-items {
  display: grid;
}

.page-faq .faq-item {
  border-top: 1px solid var(--ink-700);
  transition: background var(--dur-enter) var(--ease);
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .faq-item:target {
  background: rgba(55, 224, 216, .05);
}

.page-faq .faq-item.is-hidden {
  display: none;
}

.page-faq .faq-summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: baseline;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur-micro) var(--ease);
}

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

.page-faq .faq-summary::marker {
  content: "";
}

.page-faq .faq-num {
  border-left: 2px solid var(--ink-700);
  padding-left: 10px;
  font-size: .8125rem;
  letter-spacing: .05em;
  color: var(--slate-500);
  transition: border-color var(--dur-micro) var(--ease), color var(--dur-micro) var(--ease);
}

.page-faq .faq-summary:hover .faq-num,
.page-faq .faq-summary:focus-visible .faq-num {
  border-left-color: var(--cyan-400);
  color: var(--cyan-400);
}

.page-faq .faq-details[open] > .faq-summary .faq-num {
  border-left-color: var(--orange-400);
  color: var(--orange-400);
}

.page-faq .faq-q {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--paper-50);
}

.page-faq .faq-summary:hover .faq-q {
  color: var(--cyan-400);
}

.page-faq .faq-arrow {
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--slate-500);
  border-bottom: 2px solid var(--slate-500);
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--dur-enter) var(--ease), border-color var(--dur-micro) var(--ease);
}

.page-faq .faq-details[open] .faq-arrow {
  transform: rotate(-135deg) translateY(-2px);
  border-color: var(--orange-400);
}

.page-faq .faq-answer {
  padding: 0 0 20px;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--paper-100);
}

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

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

.page-faq .faq-steps {
  list-style: none;
  margin: 12px 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  align-items: start;
}

.page-faq .faq-stepnum {
  text-align: center;
  padding: 1px 0;
  border: 1px solid var(--orange-600);
  color: var(--orange-400);
  font-size: .75rem;
  line-height: 1.5;
}

/* 配图 */
.page-faq .faq-figure {
  margin: 4px 0 24px;
}

.page-faq .figure__frame {
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  overflow: hidden;
}

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

.page-faq .figure__caption {
  margin-top: 8px;
  font-size: .75rem;
  line-height: 1.7;
  color: var(--slate-500);
}

.page-faq .filter-empty {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--purple-400);
  background: rgba(140, 135, 168, .1);
  font-size: .875rem;
  color: var(--paper-100);
}

.page-faq .filter-empty.is-hidden {
  display: none;
}

/* 收尾协助区 */
.page-faq .faq-help__inner {
  max-width: 720px;
}

.page-faq .faq-help__label {
  margin: 0 0 8px;
  font-size: .6875rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--orange-600);
}

.page-faq .faq-help__text {
  margin: 12px 0 20px;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  align-items: center;
}

@media (min-width: 768px) {
  .page-faq .faq-filter {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px;
  }

  .page-faq .faq-answer {
    padding-left: 40px;
    max-width: 68ch;
  }

  .page-faq .faq-summary {
    padding: 20px 0;
  }

  .page-faq .faq-figure {
    margin: 4px 0 28px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding-top: 34px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 46px;
    align-items: start;
    padding-bottom: 34px;
  }

  .page-faq .faq-index {
    padding: 20px;
  }

  .page-faq .faq-q {
    font-size: 1.125rem;
  }

  .page-faq .faq-answer {
    padding-left: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-arrow,
  .page-faq .faq-num,
  .page-faq .faq-item {
    transition: none;
  }
}