.page-faq {
  --faq-rule: rgba(138, 151, 166, 0.28);
  --faq-rule-soft: rgba(138, 151, 166, 0.16);
  --faq-paper-shadow: 0 18px 40px rgba(10, 22, 34, 0.45);
  --faq-side-w: 236px;
  padding-bottom: clamp(56px, 7vw, 104px);
}

/* 面包屑 */
.page-faq .faq-crumb {
  padding-top: clamp(20px, 3vw, 34px);
  font-size: 13px;
}

/* 首屏 */
.page-faq .faq-hero {
  padding-top: clamp(24px, 3vw, 44px);
  padding-bottom: clamp(28px, 4vw, 56px);
  position: relative;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 clamp(-1px, 0, 0) auto 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-pulse), var(--faq-rule) 32%, transparent 78%);
  opacity: 0.5;
}
.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: end;
}
.page-faq .faq-hero__title {
  margin: 14px 0 18px;
  line-height: 1.02;
  letter-spacing: -0.02em;
}
.page-faq .faq-hero__lede {
  max-width: 46ch;
  color: var(--mist);
  opacity: 0.86;
}
.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 40px);
  margin-top: clamp(24px, 3vw, 36px);
  padding-top: 20px;
  border-top: 1px solid var(--faq-rule);
}
.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 92px;
}
.page-faq .faq-stat__num {
  color: var(--orange-signal);
  font-size: 22px;
  line-height: 1;
}
.page-faq .faq-stat__label {
  font-size: 12.5px;
  color: var(--fog);
  letter-spacing: 0.02em;
}
.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--ink-500);
  background: var(--ink-700);
  position: relative;
}
.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46px;
  height: 46px;
  border-left: 1px solid var(--cyan-pulse);
  border-top: 1px solid var(--cyan-pulse);
  opacity: 0.7;
  pointer-events: none;
}
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* 快捷定位 */
.page-faq .faq-jump {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 14px 0 18px;
  border-top: 1px solid var(--faq-rule);
  border-bottom: 1px solid var(--faq-rule);
  scrollbar-width: thin;
}
.page-faq .faq-jump__label {
  flex: 0 0 auto;
  align-self: center;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--fog);
  text-transform: uppercase;
  padding-right: 6px;
}
.page-faq .faq-jump__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 13px;
  border: 1px solid var(--ink-500);
  color: var(--mist);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color 160ms var(--fh-ease), color 160ms var(--fh-ease), background-color 160ms var(--fh-ease);
}
.page-faq .faq-jump__item .fh-mono {
  font-size: 11.5px;
  color: var(--cyan-pulse);
}
.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  border-color: var(--cyan-pulse);
  background: rgba(53, 229, 210, 0.08);
  outline: none;
}

/* 主体双栏 */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 3vw, 48px);
  padding-top: clamp(30px, 4vw, 52px);
}

/* 侧栏目录 */
.page-faq .faq-side {
  align-self: start;
}
.page-faq .faq-side__caption {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--fog);
  text-transform: uppercase;
  margin: 0 0 14px;
}
.page-faq .faq-toc {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--faq-rule);
}
.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 0 9px 14px;
  color: var(--fog);
  font-size: 13.5px;
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color 160ms var(--fh-ease), border-color 160ms var(--fh-ease), background-color 160ms var(--fh-ease);
}
.page-faq .faq-toc__link .fh-mono {
  font-size: 11.5px;
  opacity: 0.75;
}
.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--mist);
  outline: none;
}
.page-faq .faq-toc__link.is-active {
  color: var(--cyan-pulse);
  border-left-color: var(--cyan-pulse);
  background: rgba(53, 229, 210, 0.06);
}
.page-faq .faq-side__note {
  margin-top: 22px;
  padding: 16px;
  border: 1px solid var(--ink-500);
  background: var(--ink-700);
}
.page-faq .faq-side__note p {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--fog);
}
.page-faq .faq-side__btn {
  width: 100%;
  text-align: center;
  font-size: 13px;
}

/* 答案流 */
.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(40px, 5vw, 72px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 120px;
}
.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 14px;
  align-items: baseline;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 2px solid var(--orange-signal);
}
.page-faq .faq-group__num {
  font-size: 26px;
  line-height: 1;
  color: var(--orange-signal);
}
.page-faq .faq-group__title {
  margin: 0;
  line-height: 1.1;
}
.page-faq .faq-group__desc {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--fog);
  max-width: 52ch;
}

/* 问答条目 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}
.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--mist);
  line-height: 1.6;
  transition: color 160ms var(--fh-ease);
}
.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.4;
  color: var(--cyan-pulse);
  transition: transform 200ms var(--fh-ease);
}
.page-faq .faq-item[open] .faq-item__q {
  color: var(--cyan-pulse);
}
.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-pulse);
  outline: none;
}
.page-faq .faq-item__a {
  background: var(--paper);
  color: var(--ink-black);
  padding: clamp(16px, 2vw, 24px) clamp(16px, 2.4vw, 28px);
  margin: 0 0 18px;
  border-left: 3px solid var(--ember);
  box-shadow: var(--faq-paper-shadow);
}
.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
}
.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item__a a {
  color: var(--ember);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--ink-black);
  outline: none;
}
.page-faq .faq-item__a .fh-mono {
  color: var(--ink-black);
  font-size: 14.5px;
  background: rgba(217, 69, 43, 0.1);
  padding: 1px 5px;
}

/* 内嵌示意图 */
.page-faq .faq-inline-figure {
  margin: 20px 0 6px;
  border: 1px solid var(--ink-500);
  background: var(--ink-700);
}
.page-faq .faq-inline-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 5 / 4;
  object-fit: cover;
}
.page-faq .faq-inline-figure__cap {
  display: block;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--fog);
  border-top: 1px solid var(--ink-500);
  letter-spacing: 0.02em;
}

/* 站点信息表 */
.page-faq .faq-facts {
  margin: 0 0 8px;
  display: grid;
  gap: 0;
  border: 1px solid var(--ink-500);
  background: var(--ink-700);
}
.page-faq .faq-facts__row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 14px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--faq-rule-soft);
}
.page-faq .faq-facts__row:last-child {
  border-bottom: 0;
}
.page-faq .faq-facts dt {
  font-size: 12.5px;
  color: var(--fog);
  letter-spacing: 0.04em;
}
.page-faq .faq-facts dd {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
  word-break: break-word;
}
.page-faq .faq-facts dd.fh-mono {
  font-size: 15px;
  color: var(--cyan-pulse);
}

/* 结尾行动区 */
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px 28px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--ink-500);
  background:
    linear-gradient(115deg, rgba(255, 106, 43, 0.14), transparent 58%),
    var(--ink-700);
  position: relative;
}
.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan-pulse);
}
.page-faq .faq-cta__text {
  flex: 1 1 260px;
  min-width: 0;
}
.page-faq .faq-cta__title {
  margin: 10px 0 8px;
  line-height: 1.15;
}
.page-faq .faq-cta__text p {
  margin: 0;
  font-size: 14px;
  color: var(--fog);
}
.page-faq .faq-cta__btn {
  flex: 0 0 auto;
}

@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 7fr 5fr;
  }
}

@media (min-width: 961px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-side {
    position: sticky;
    top: 108px;
  }
  .page-faq .faq-side__note {
    margin-top: 28px;
  }
}

@media (max-width: 960px) {
  .page-faq .faq-side {
    border-bottom: 1px solid var(--faq-rule);
    padding-bottom: 22px;
  }
  .page-faq .faq-side__caption {
    display: none;
  }
  .page-faq .faq-toc {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
    border-left: 0;
  }
  .page-faq .faq-toc__link {
    padding: 7px 12px;
    border: 1px solid var(--ink-500);
    border-left: 1px solid var(--ink-500);
    margin-left: 0;
    font-size: 13px;
  }
  .page-faq .faq-toc__link.is-active {
    border-color: var(--cyan-pulse);
  }
  .page-faq .faq-side__note {
    display: none;
  }
  .page-faq .faq-facts__row {
    grid-template-columns: 76px 1fr;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-jump__label {
    display: none;
  }
  .page-faq .faq-item__a {
    padding: 16px 15px;
  }
  .page-faq .faq-item__q {
    font-size: 14.5px;
    padding: 14px 2px;
  }
  .page-faq .faq-facts__row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .page-faq .faq-cta__btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__item,
  .page-faq .faq-toc__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after {
    transition: none;
  }
}