.page-faq {
  --faq-side: 280px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding: 18px 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--grey);
}
.page-faq .breadcrumbs a {
  color: var(--grey);
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--neon);
}
.page-faq .breadcrumbs span[aria-hidden] {
  padding: 0 8px;
  color: var(--grid);
}
.page-faq .breadcrumbs span[aria-current] {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(8px, 2vw, 20px);
  padding-bottom: clamp(32px, 5vw, 60px);
}
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}
.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-faq .faq-hero__lede {
  margin-top: 20px;
  max-width: 60ch;
  color: var(--grey);
}
.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--grey);
}
.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 7px;
}
.page-faq .faq-hero__facts .mono {
  font-size: 16px;
  color: var(--gold);
}
.page-faq .faq-hero__figure {
  width: 100%;
  max-width: 380px;
  justify-self: start;
  margin: 0;
}

/* ---------- 检索 ---------- */
.page-faq .faq-search__box {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--panel);
  border: 1px solid var(--edge);
  border-left: 3px solid var(--neon);
  border-radius: var(--radius);
}
.page-faq .faq-search__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--grey);
  text-transform: uppercase;
}
.page-faq .faq-search__input {
  width: 100%;
  padding: 13px 15px;
  background: var(--ink);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.4;
  transition: border-color 160ms var(--ease);
}
.page-faq .faq-search__input::placeholder {
  color: #6d7688;
}
.page-faq .faq-search__input:hover {
  border-color: var(--edge);
}
.page-faq .faq-search__input:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-color: var(--neon);
}
.page-faq .faq-search__hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--grey);
}

/* ---------- 五组主题 ---------- */
.page-faq .faq-topics__head {
  max-width: 62ch;
}
.page-faq .faq-topics__head .h2 {
  margin: 10px 0 0;
}
.page-faq .faq-topics__head .note-text {
  margin: 12px 0 0;
}
.page-faq .faq-topics__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 3.4vw, 36px);
  background: var(--edge);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-faq .faq-topic {
  position: relative;
  display: grid;
  gap: 5px;
  padding: 20px 18px 22px 20px;
  background: var(--panel);
  border-left: 3px solid transparent;
  color: var(--paper);
  text-decoration: none;
  transition: background 160ms var(--ease), border-color 160ms var(--ease), transform 160ms var(--ease);
}
.page-faq .faq-topic:hover,
.page-faq .faq-topic:focus-visible {
  background: var(--edge);
  border-left-color: var(--brick);
  transform: translateY(-2px);
}
.page-faq .faq-topic:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -3px;
}
.page-faq .faq-topic__no {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
}
.page-faq .faq-topic__name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.page-faq .faq-topic__count {
  font-size: 12px;
  color: var(--neon);
}
.page-faq .faq-topic__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey);
}
.page-faq .faq-topics__figure {
  margin-top: clamp(24px, 3.4vw, 36px);
}

/* ---------- 问答主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
  align-items: start;
}
.page-faq .faq-body {
  min-width: 0;
}
.page-faq .faq-toc {
  min-width: 0;
}

.page-faq .faq-toc .toc {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  padding: 16px 0 12px;
}
.page-faq .faq-toc .toc__head {
  margin: 0 0 10px;
  padding: 0 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--grey);
  text-transform: uppercase;
}
.page-faq .faq-toc ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}
.page-faq .faq-toc .toc__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 10px;
  padding: 10px 16px;
  border-left: 3px solid transparent;
  color: var(--grey);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease);
}
.page-faq .faq-toc .toc__link:hover {
  color: var(--paper);
  background: var(--ink);
}
.page-faq .faq-toc .toc__link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
}
.page-faq .faq-toc .toc__link.is-active {
  color: var(--paper);
  border-left-color: var(--brick);
  background: var(--ink);
}
.page-faq .faq-toc .toc__link .mono:first-child {
  font-size: 12px;
  color: var(--gold);
}
.page-faq .faq-toc__n {
  font-size: 11px;
  color: var(--grey);
}
.page-faq .faq-toc .toc__link.is-active .faq-toc__n {
  color: var(--neon);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 76px);
}
.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--grid);
}
.page-faq .faq-group__no {
  font-family: var(--mono);
  font-size: clamp(34px, 5.2vw, 52px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--brick);
  font-variant-numeric: tabular-nums;
}
.page-faq .faq-group__head .h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 28px);
}
.page-faq .faq-group__head .note-text {
  margin: 6px 0 0;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
}
.page-faq .faq-item {
  border-bottom: 1px solid var(--edge);
}
.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 6px;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color 160ms var(--ease), background 160ms var(--ease);
}
.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__q::marker {
  content: "";
}
.page-faq .faq-item__q:hover {
  color: var(--neon);
  background: rgba(255, 255, 255, .015);
}
.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}
.page-faq .faq-item__mark {
  position: relative;
  display: block;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  transition: transform 200ms var(--ease);
}
.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--brick-light);
  transform: translate(-50%, -50%);
}
.page-faq .faq-item__mark::before {
  width: 14px;
  height: 2px;
}
.page-faq .faq-item__mark::after {
  width: 2px;
  height: 14px;
}
.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(45deg);
}
.page-faq .faq-item[open] .faq-item__q {
  color: var(--paper);
}
.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--gold);
}

.page-faq .faq-item__a {
  padding: 0 6px 24px 36px;
  max-width: 66ch;
}
.page-faq .faq-item__a p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--grey);
}
.page-faq .faq-steps {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 8px;
}
.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey);
}
.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gold);
  padding-top: 3px;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-help__panel {
  padding: clamp(24px, 4vw, 42px);
  background: var(--panel);
  border: 1px solid var(--edge);
  border-left: 4px solid var(--brick);
  border-radius: var(--radius);
  box-shadow: var(--shadow-stack);
}
.page-faq .faq-help__panel .h2 {
  margin: 14px 0 0;
}
.page-faq .faq-help__panel .lede {
  margin-top: 14px;
  color: var(--grey);
}
.page-faq .faq-help__list {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--grey);
}
.page-faq .faq-help__list .mono {
  font-size: 13px;
  color: var(--brick-light);
  padding-top: 3px;
}
.page-faq .faq-help__panel .note-text {
  margin: 24px 0 0;
}
.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 28px);
}
.page-faq .faq-help__links {
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--edge);
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey);
}
.page-faq .faq-help__links a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 214, 208, .35);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.page-faq .faq-help__links a:hover,
.page-faq .faq-help__links a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--gold);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 640px) {
  .page-faq .faq-hero__figure {
    max-width: 100%;
  }
  .page-faq .faq-item__a {
    padding-left: 30px;
  }
  .page-faq .faq-group__head {
    gap: 12px;
  }
  .page-faq .faq-group__no {
    font-size: 30px;
  }
}

/* ---------- 中等屏 ---------- */
@media (min-width: 641px) {
  .page-faq .faq-topics__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr);
  }
  .page-faq .faq-hero__figure {
    justify-self: end;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-topics__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: clamp(36px, 4vw, 56px);
  }
  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-topic,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__q,
  .page-faq .faq-toc .toc__link {
    transition: none;
  }
  .page-faq .faq-topic:hover,
  .page-faq .faq-topic:focus-visible {
    transform: none;
  }
}