.page-faq {
  --faq-index-w: 236px;
  --faq-ink-soft: rgba(242, 245, 239, .84);
  --faq-ink-faint: rgba(242, 245, 239, .58);
  --faq-dark-soft: rgba(5, 8, 10, .78);

  background: var(--night-green);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(28px, 4vw, 56px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(230, 255, 59, .10), transparent 62%),
    linear-gradient(180deg, var(--stand-green), var(--night-green) 70%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: .22;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 82%);
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

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

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--fluoro);
}

.page-faq .faq-hero__eyebrow {
  margin: 26px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--data-blue);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  font-size: clamp(30px, 6.2vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  max-width: 17em;
  overflow-wrap: break-word;
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--fluoro);
  box-shadow: inset 0 -0.14em 0 0 rgba(230, 255, 59, .24);
}

.page-faq .faq-hero__foot {
  display: grid;
  gap: 24px;
  margin-top: clamp(24px, 4vw, 44px);
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.page-faq .faq-hero__stats li {
  border-left: 2px solid var(--fluoro);
  padding-left: 12px;
}

.page-faq .faq-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.1;
  color: var(--fluoro);
}

.page-faq .faq-hero__lab {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

.page-faq .faq-hero__tag {
  margin: 28px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--warm);
  opacity: .82;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__foot {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: end;
  }
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-top: clamp(28px, 5vw, 64px);
  padding-bottom: clamp(48px, 8vw, 104px);
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
}

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

/* ---------- 左侧索引 ---------- */

.page-faq .faq-aside {
  border: 1px solid var(--line-soft);
  background: rgba(14, 36, 27, .76);
  padding: 18px 16px;
}

@media (min-width: 1024px) {
  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

.page-faq .faq-aside__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
}

.page-faq .faq-index a {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr) 1.6em;
  gap: 8px;
  align-items: baseline;
  padding: 8px 8px 8px 10px;
  border-left: 2px solid transparent;
  color: var(--paper);
  text-decoration: none;
  transition: background var(--step) linear, border-color var(--step) linear, color var(--step) linear;
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  background: var(--fluoro-ghost);
  border-left-color: var(--fluoro);
  color: var(--fluoro);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--fluoro);
}

.page-faq .faq-index__t {
  font-size: 15px;
  line-height: 1.5;
}

.page-faq .faq-index__c {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--muted);
  text-align: right;
}

@media (max-width: 1023px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-faq .faq-index {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 筛选条 ---------- */

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}

/* ---------- 章节 ---------- */

.page-faq .faq-block {
  padding-top: clamp(36px, 6vw, 76px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-block--tint {
  margin-top: clamp(36px, 6vw, 76px);
  padding: clamp(22px, 4vw, 44px);
  padding-top: clamp(22px, 4vw, 44px);
  border: 1px solid var(--line-hard);
  background: var(--stand-green);
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-hard);
}

.page-faq .faq-block__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--fluoro);
}

.page-faq .faq-block__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-faq .faq-block__sub {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 插图 ---------- */

.page-faq .faq-figure {
  margin: 22px 0 4px;
  border: 1px solid var(--line-soft);
  background: var(--night-green);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 问答条目 ---------- */

.page-faq .qa {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  padding-left: 18px;
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--fluoro);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--step) linear;
}

.page-faq .qa[open]::before {
  transform: scaleY(1);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: 3.4em minmax(0, 1fr) 1.6em;
  gap: 12px;
  align-items: baseline;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(16px, 1.8vw, 18px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
  transition: color var(--step) linear;
}

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

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

.page-faq .qa__summary:hover,
.page-faq .qa__summary:focus-visible {
  color: var(--fluoro);
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--data-blue);
}

.page-faq .qa__q {
  overflow-wrap: break-word;
}

.page-faq .qa__mark {
  position: relative;
  justify-self: end;
  align-self: center;
  width: 12px;
  height: 12px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 12px;
  height: 2px;
  background: var(--fluoro);
  transition: transform var(--step) linear, opacity var(--step) linear;
}

.page-faq .qa__mark::after {
  transform: rotate(90deg);
}

.page-faq .qa[open] .qa__mark::after {
  transform: rotate(0deg);
}

.page-faq .qa__body {
  padding: 2px 0 24px;
  max-width: 44em;
}

.page-faq .qa__a {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
  max-width: 40em;
}

.page-faq .qa__link {
  color: var(--data-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .qa__link:hover,
.page-faq .qa__link:focus-visible {
  color: var(--fluoro);
}

.page-faq .qa__steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  counter-reset: qa-step;
  display: grid;
  gap: 8px;
}

.page-faq .qa__steps li {
  counter-increment: qa-step;
  position: relative;
  padding-left: 2.8em;
  font-size: 15px;
  line-height: 1.65;
  color: var(--faq-ink-faint);
}

.page-faq .qa__steps li::before {
  content: counter(qa-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--fluoro);
}

/* ---------- 收束区块 ---------- */

.page-faq .faq-close {
  margin-top: clamp(40px, 7vw, 88px);
  padding: clamp(24px, 4vw, 52px);
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--paper);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-close h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: 88%;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-close > p {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-dark-soft);
}

.page-faq .faq-close__contact {
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(5, 8, 10, .18);
  border: 1px solid rgba(5, 8, 10, .18);
}

.page-faq .faq-close__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 14px;
  background: var(--paper);
}

@media (min-width: 640px) {
  .page-faq .faq-close__row {
    grid-template-columns: 8em minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

.page-faq .faq-close__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(5, 8, 10, .56);
}

.page-faq .faq-close__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: break-word;
}

.page-faq .faq-close__hint {
  margin: 28px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--faq-dark-soft);
}

.page-faq .faq-close__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-close__list li {
  position: relative;
  padding-left: 1.6em;
  font-size: 15px;
  line-height: 1.65;
  color: var(--faq-dark-soft);
}

.page-faq .faq-close__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 10px;
  height: 2px;
  background: var(--board-orange);
}

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

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa::before,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-index a,
  .page-faq .qa__summary {
    transition: none;
  }

  .page-faq .qa::before {
    transform: scaleY(1);
    opacity: .9;
  }
}