.page-faq {
  --faq-sticky-top: 148px;
  background: var(--ink-900);
  color: var(--cream);
  overflow-x: hidden;
}

.page-faq .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 24px 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.page-faq .crumbs a {
  color: var(--warm);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--hairline-cyan);
}

.page-faq .crumbs [aria-current="page"] {
  color: var(--cyan);
}

.page-faq .crumbs__sep {
  color: var(--moss);
}

/* ---------- 页头 ---------- */
.page-faq .faq-head {
  display: grid;
  gap: var(--gap);
  padding: 8px 0 40px;
  border-bottom: 1px solid var(--hairline-strong);
}

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

.page-faq .faq-head__kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-head h1 {
  margin: 0 0 20px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--cream);
  max-width: 20ch;
}

.page-faq .faq-head__lede {
  margin: 0 0 24px;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.85;
  color: var(--warm);
  max-width: 46em;
}

.page-faq .faq-head__quick {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-faq .faq-head__quick li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  background: var(--ink-800);
  border-left: 2px solid var(--hairline-cyan);
}

.page-faq .faq-head__quick .num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-head__quick em {
  font-family: var(--font-sans);
  font-style: normal;
  font-size: 13px;
  color: var(--warm);
}

.page-faq .faq-head__media {
  border: 1px solid var(--hairline);
  background: var(--ink-800);
}

/* ---------- 主区布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  padding: 32px 0 72px;
}

.page-faq .faq-index {
  border: 1px solid var(--hairline);
  background: var(--ink-800);
  padding: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--rock);
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--warm);
  text-decoration: none;
  border-left: 2px solid transparent;
  background: var(--ink-900);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--rock);
  transition: color var(--dur-fast) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--moss);
}

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

.page-faq .faq-index__link[aria-current],
.page-faq .faq-index__link[data-current] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--moss);
}

.page-faq .faq-index__link[aria-current] .faq-index__num,
.page-faq .faq-index__link[data-current] .faq-index__num {
  color: var(--cyan);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: var(--faq-sticky-top);
  padding-top: 16px;
  margin-bottom: 40px;
  border-top: 1px solid var(--hairline-strong);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--cyan-dim);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(18px, 3.6vw, 24px);
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--cream);
}

.page-faq .faq-group__head--split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.page-faq .faq-group__head--split > div:first-child {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
}

.page-faq .faq-figure {
  width: 100%;
  max-width: 220px;
  border: 1px solid var(--hairline-cyan);
  background: var(--ink-800);
}

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-item__q {
  position: relative;
  display: block;
  padding: 16px 44px 16px 14px;
  font-family: var(--font-sans);
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--cream);
  cursor: pointer;
  list-style: none;
  box-shadow: inset 3px 0 0 transparent;
  transition: color var(--dur-fast) var(--ease), box-shadow var(--dur-mid) var(--ease), background var(--dur-fast) var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] > .faq-item__q {
  box-shadow: inset 3px 0 0 var(--cyan);
  background: var(--ink-800);
  color: var(--cyan);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  content: "−";
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--cyan);
  background: var(--ink-800);
}

.page-faq .faq-item__a {
  padding: 4px 16px 22px 17px;
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--warm);
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed var(--hairline-cyan);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--cream);
}

.page-faq .faq-time {
  font-family: var(--font-mono);
  font-size: 0.96em;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-size: 0.95em;
  color: var(--cream);
  word-break: break-all;
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-group--contact {
  border-top-color: var(--hairline-cyan);
}

.page-faq .faq-contact {
  padding: 20px 16px 24px;
  background: var(--ink-800);
  border: 1px solid var(--hairline-cyan);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-contact__lede {
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--warm);
}

.page-faq .faq-contact__list {
  margin: 0 0 16px;
  padding: 0;
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 10px 0;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-contact__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-contact dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--rock);
}

.page-faq .faq-contact dd {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--cream);
}

.page-faq .faq-contact__note {
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
}

.page-faq .faq-contact__btn {
  display: inline-block;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-head__quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-head {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
    align-items: start;
    padding-bottom: 56px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 48px;
    padding: 40px 0 96px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-index__link {
    width: 100%;
    box-sizing: border-box;
  }

  .page-faq .faq-group {
    padding-top: 20px;
    margin-bottom: 56px;
  }

  .page-faq .faq-group__head--split {
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 32px;
  }

  .page-faq .faq-item__q {
    padding: 18px 48px 18px 18px;
    font-size: 16px;
  }

  .page-faq .faq-item__a {
    padding: 6px 56px 26px 21px;
  }

  .page-faq .faq-item__a p {
    font-size: 16px;
  }

  .page-faq .faq-contact {
    padding: 28px 32px 32px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-head {
    grid-template-columns: minmax(0, 1fr) 360px;
  }

  .page-faq .faq-head h1 {
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .crumbs a,
  .page-faq .faq-index__link,
  .page-faq .faq-index__num,
  .page-faq .faq-item__q,
  .page-faq .faq-item__a a {
    transition-duration: 0ms;
  }
}