.page-faq {
  --faq-accent: var(--mint);
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-faq .faq-shell {
  padding-top: clamp(20px, 3vw, 34px);
}

.page-faq .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

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

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

.page-faq .breadcrumbs__sep {
  color: var(--dim);
}

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

/* 首屏 */
.page-faq .faq-hero {
  margin-top: 18px;
  padding: clamp(22px, 4vw, 40px) clamp(18px, 3vw, 36px) clamp(24px, 4vw, 38px);
  border: 1px solid var(--line);
  background-color: var(--panel);
  background-image:
    repeating-linear-gradient(90deg, rgba(23, 54, 44, 0.55) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(23, 54, 44, 0.55) 0 1px, transparent 1px 72px);
  background-position: 0 0;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.5vw, 54px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

.page-faq .faq-hero__meta {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* 主体骨架 */
.page-faq .faq-body {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

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

.page-faq .faq-index__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  min-height: 44px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--paper);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--mint);
  border-color: var(--mint-deep);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--mint);
}

.page-faq .faq-index__note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--dim);
}

/* 问答组 */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  padding-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--faq-accent);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 56px);
}

.page-faq .faq-group--a { --faq-accent: var(--mint); }
.page-faq .faq-group--b { --faq-accent: var(--ember); }
.page-faq .faq-group--c { --faq-accent: var(--mint-deep); }
.page-faq .faq-group--d { --faq-accent: var(--ember-red); }
.page-faq .faq-group--e { --faq-accent: var(--mint); }

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 44px);
  line-height: 0.9;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__desc {
  margin: 14px 0 6px;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* 图片 */
.page-faq .faq-figure {
  margin: 20px 0 22px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72);
}

.page-faq .faq-figure figcaption {
  padding: 11px 14px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* 折叠条目 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  min-height: 44px;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  transition: color 180ms var(--ease);
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--faq-accent);
}

.page-faq .faq-item summary:focus-visible {
  outline: 1px solid var(--faq-accent);
  outline-offset: 3px;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--faq-accent);
}

.page-faq .faq-item__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
  transition: transform 260ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-answer {
  animation: page-faq-drop 260ms var(--ease) both;
}

@keyframes page-faq-drop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-answer {
  padding: 0 0 22px;
}

.page-faq .faq-answer p {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--paper);
}

.page-faq .faq-answer p + .faq-steps,
.page-faq .faq-steps + p {
  margin-top: 14px;
}

.page-faq .faq-steps {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  max-width: 38em;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: faq-step;
  padding-left: 34px;
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--faq-accent);
}

/* 下一步 */
.page-faq .faq-next {
  margin-top: clamp(40px, 6vw, 66px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--paper);
}

.page-faq .faq-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-next__grid a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 52px;
  padding: 15px 16px;
  background: var(--panel);
  color: var(--paper);
  font-size: 14.5px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 180ms var(--ease), filter 180ms var(--ease);
}

.page-faq .faq-next__grid a::after {
  content: "→";
  flex: none;
  font-family: var(--font-mono);
  color: var(--mint);
}

.page-faq .faq-next__grid a:hover,
.page-faq .faq-next__grid a:focus-visible {
  color: var(--mint);
  filter: brightness(1.3);
}

@media (min-width: 720px) {
  .page-faq .faq-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 0;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
    align-self: start;
    padding-right: 20px;
    border-right: 1px solid var(--line);
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list li {
    flex: none;
  }

  .page-faq .faq-index__link {
    min-height: 0;
    padding: 12px 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    background: transparent;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-bottom-color: var(--mint-deep);
  }

  .page-faq .faq-index__note {
    margin-top: 16px;
  }

  .page-faq .faq-groups {
    padding-left: clamp(24px, 3.5vw, 44px);
  }

  .page-faq .faq-hero__lede,
  .page-faq .faq-answer p,
  .page-faq .faq-steps {
    font-size: 15px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-answer {
    animation: none;
  }

  .page-faq .faq-item__sign::after,
  .page-faq .faq-item summary,
  .page-faq .faq-index__link,
  .page-faq .faq-next__grid a {
    transition: none;
  }
}