.page-faq {
  --faq-index-w: 208px;
  --faq-qa-pad: clamp(14px, 1.7vw, 20px);
  --faq-line-soft: rgba(27, 74, 63, .62);
  background: var(--ink);
  color: var(--body);
  overflow-x: clip;
}

/* ---------- 页头 ---------- */
.page-faq .kb-head {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .kb-head__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .kb-head__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: .34;
  filter: saturate(.72) contrast(1.08);
}

.page-faq .kb-head__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 16, 14, .74) 0%, rgba(5, 16, 14, .9) 58%, var(--ink) 100%),
    repeating-linear-gradient(90deg, rgba(0, 229, 192, .05) 0 1px, transparent 1px 96px);
}

.page-faq .kb-head__inner {
  position: relative;
  z-index: 1;
  padding: clamp(34px, 6vw, 78px) 0 clamp(30px, 4.6vw, 54px);
}

.page-faq .kb-head__kicker {
  margin: 22px 0 0;
  color: var(--cyan);
}

.page-faq .kb-head__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(40px, 9.5vw, 84px);
  line-height: .98;
  letter-spacing: -.03em;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .kb-head__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--body);
}

.page-faq .kb-head__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 4vw, 52px);
  margin-top: clamp(24px, 3.4vw, 38px);
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .kb-head__stat {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .04em;
}

.page-faq .kb-head__num {
  font-size: 24px;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-faq .kb-head__slash {
  position: absolute;
  right: -8%;
  bottom: -46px;
  width: 54%;
  height: 84px;
  z-index: 1;
  background: linear-gradient(100deg, rgba(18, 51, 43, 0) 0%, rgba(18, 51, 43, .82) 46%, rgba(0, 229, 192, .16) 100%);
  transform: skewY(-3.2deg);
  pointer-events: none;
}

/* ---------- 分类条 ---------- */
.page-faq .kb-tabs {
  border-bottom: 1px solid var(--line-soft);
  background: var(--ink);
}

.page-faq .kb-tabs__list {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 13px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .kb-tabs__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: none;
  padding: 7px 14px;
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--panel);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .kb-tabs__link:hover,
.page-faq .kb-tabs__link:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .kb-tabs__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .kb-tabs__no {
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: .06em;
}

/* ---------- 主体布局 ---------- */
.page-faq .kb-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  padding-top: clamp(34px, 5.4vw, 68px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .kb-index {
  display: none;
}

.page-faq .kb-body {
  min-width: 0;
}

/* ---------- 左侧索引 ---------- */
.page-faq .kb-index__inner {
  border-left: 1px solid var(--line-soft);
  padding-left: 16px;
}

.page-faq .kb-index__title {
  margin: 0 0 12px;
  color: var(--muted-deep);
}

.page-faq .kb-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .kb-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .kb-index__link:hover,
.page-faq .kb-index__link:focus-visible {
  color: var(--cyan-dim);
  border-bottom-color: var(--line-soft);
  padding-left: 4px;
}

.page-faq .kb-index__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .kb-index__no {
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: .06em;
}

.page-faq .kb-index__foot {
  margin: 18px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted-deep);
}

.page-faq .kb-index__foot a {
  color: var(--cyan-dim);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

/* ---------- 分组 ---------- */
.page-faq .kb-group {
  scroll-margin-top: 20px;
  margin-bottom: clamp(36px, 6vw, 62px);
}

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

.page-faq .kb-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .kb-group__no {
  font-size: clamp(20px, 3vw, 30px);
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-faq .kb-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 30px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .kb-group__rule {
  flex: 1 1 auto;
  height: 1px;
  min-width: 20px;
  background: linear-gradient(90deg, var(--line-soft), transparent);
  transform: translateY(-4px);
}

.page-faq .kb-group__lede {
  margin: 14px 0 20px;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .kb-group__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-faq .kb-group__main {
  min-width: 0;
  order: 2;
}

.page-faq .kb-group__figure {
  margin: 0;
  order: 1;
}

.page-faq .kb-group__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  filter: saturate(.82) contrast(1.05);
}

.page-faq .kb-group__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted-deep);
}

.page-faq .kb-group__more {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .kb-group__more a,
.page-faq .qa__a a {
  color: var(--cyan-dim);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.page-faq .kb-group__more a:hover,
.page-faq .qa__a a:hover {
  text-decoration-color: var(--cyan);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  background: var(--panel);
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
  margin-bottom: 10px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--line);
  transform: translateY(-2px);
}

.page-faq .qa[open] {
  border-color: var(--cyan);
  transform: none;
  background: linear-gradient(180deg, rgba(18, 51, 43, .5) 0%, var(--panel) 62%);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: var(--faq-qa-pad);
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__no {
  flex: none;
  padding-top: 3px;
  font-size: 11.5px;
  color: var(--cyan);
  letter-spacing: .06em;
}

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

.page-faq .qa__mark {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-left: auto;
  margin-top: 5px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .qa__mark::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--cyan);
}

.page-faq .qa[open] .qa__mark::after {
  background: var(--cyan);
  transform: scaleY(0);
}

.page-faq .qa__a {
  padding: 0 var(--faq-qa-pad) calc(var(--faq-qa-pad) + 4px);
  padding-left: calc(var(--faq-qa-pad) + 28px);
  font-size: 15px;
  line-height: 1.78;
  color: var(--body);
  overflow-wrap: break-word;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 42em;
}

.page-faq .qa__a p + p {
  margin-top: 8px;
}

/* ---------- 步骤列表 ---------- */
.page-faq .steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .steps > li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 28px;
  margin-bottom: 12px;
  line-height: 1.7;
}

.page-faq .steps > li:last-child {
  margin-bottom: 0;
}

.page-faq .steps > li::before {
  content: counter(faqstep);
  position: absolute;
  left: 0;
  top: 4px;
  width: 17px;
  height: 17px;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 16px;
  text-align: center;
  color: var(--cyan);
}

.page-faq .steps > li::after {
  content: "";
  position: absolute;
  left: 8.5px;
  top: 23px;
  bottom: -9px;
  width: 1px;
  background: var(--faq-line-soft);
}

.page-faq .steps > li:last-child::after {
  content: none;
}

/* ---------- 焦点与减动效 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .kb-tabs__link,
  .page-faq .kb-index__link {
    transition-duration: 1ms;
  }

  .page-faq .qa:hover,
  .page-faq .kb-tabs__link:hover {
    transform: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-faq .kb-group__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .kb-group--media .kb-group__grid {
    grid-template-columns: minmax(0, 1fr) 240px;
    align-items: start;
    gap: clamp(20px, 3vw, 34px);
  }

  .page-faq .kb-group--media .kb-group__main {
    order: 1;
  }

  .page-faq .kb-group--media .kb-group__figure {
    order: 2;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 920px) {
  .page-faq .kb-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(34px, 4.6vw, 72px);
  }

  .page-faq .kb-index {
    display: block;
  }

  .page-faq .kb-index__inner {
    position: sticky;
    top: 30px;
  }

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

  .page-faq .kb-head__lede {
    font-size: 17px;
  }
}

@media (min-width: 1180px) {
  .page-faq .kb-group--media .kb-group__grid {
    grid-template-columns: minmax(0, 1fr) 268px;
  }
}