.page-faq {
  --faq-cut: 22px;
}

/* ---------- 面包屑 ---------- */
.page-faq .k8-breadcrumb {
  padding: var(--k8-s24) 0 var(--k8-s8);
}

.page-faq .faq-crumb-sep {
  margin: 0 8px;
  color: var(--k8-text-dim);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding-bottom: var(--k8-s32);
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: clamp(24px, 4.4vw, 48px);
  box-shadow: inset 0 0 0 1px var(--k8-border);
  clip-path: polygon(
    0 0,
    calc(100% - var(--faq-cut)) 0,
    100% var(--faq-cut),
    100% 100%,
    var(--faq-cut) 100%,
    0 calc(100% - var(--faq-cut))
  );
  background:
    radial-gradient(120% 130% at 96% 0%, rgba(46, 123, 255, 0.2), transparent 58%),
    linear-gradient(158deg, var(--k8-surface) 0%, var(--k8-bg-alt) 60%, var(--k8-bg) 100%);
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  right: 22px;
  bottom: 16px;
  width: 64px;
  height: 8px;
  opacity: 0.75;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, var(--k8-accent) 0 2px, transparent 2px 8px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--k8-s24);
}

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

.page-faq .faq-hero h1 {
  margin: var(--k8-s16) 0;
  font-family: var(--k8-font-display);
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--k8-text);
}

.page-faq .faq-hero__lead {
  max-width: 64ch;
  font-size: var(--k8-t16);
  line-height: 1.78;
  color: var(--k8-text-dim);
}

.page-faq .faq-hero__stat {
  display: grid;
  gap: var(--k8-s12);
  padding-left: var(--k8-s16);
  border-left: 3px solid var(--k8-accent);
}

.page-faq .faq-hero__statRow {
  display: flex;
  align-items: baseline;
  gap: var(--k8-s8);
}

.page-faq .faq-hero__statNum {
  font-size: var(--k8-t26);
  font-weight: 700;
  line-height: 1;
  color: var(--k8-accent);
}

.page-faq .faq-hero__statLabel {
  font-size: var(--k8-t14);
  color: var(--k8-text-dim);
}

/* ---------- 分类索引条 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: 68px;
  z-index: 30;
  margin: var(--k8-s32) 0;
  padding: var(--k8-s8) 0;
  background: var(--k8-capsule-bg);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--k8-border);
  border-bottom: 1px solid var(--k8-border);
}

.page-faq .faq-index__track {
  display: flex;
  gap: var(--k8-s8);
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-faq .faq-index__link {
  flex: 0 0 auto;
  padding: 8px 16px;
  border: 1px solid var(--k8-border);
  border-radius: var(--k8-radius);
  font-size: var(--k8-t14);
  font-weight: 600;
  white-space: nowrap;
  color: var(--k8-text-dim);
  text-decoration: none;
  transition: color 0.18s var(--k8-ease), border-color 0.18s var(--k8-ease),
    background 0.18s var(--k8-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--k8-text);
  border-color: var(--k8-accent);
  background: var(--k8-hover-wash);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--k8-s48);
  padding-bottom: var(--k8-s72);
}

.page-faq .faq-block {
  position: relative;
  padding-top: var(--k8-s24);
  border-top: 2px solid var(--k8-line);
  scroll-margin-top: 150px;
}

.page-faq .faq-block::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 80px;
  height: 2px;
  background: var(--k8-accent);
}

.page-faq .faq-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--k8-s8) var(--k8-s12);
  margin-bottom: var(--k8-s16);
}

.page-faq .faq-block__no {
  padding: 2px 8px;
  border: 1px solid var(--k8-line);
  border-radius: 3px;
  font-size: var(--k8-t12);
  letter-spacing: 0.12em;
  color: var(--k8-accent);
}

.page-faq .faq-block h2 {
  margin: 0;
  font-family: var(--k8-font-display);
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--k8-text);
}

.page-faq .faq-block__desc {
  flex: 1 1 100%;
  max-width: 62ch;
  font-size: var(--k8-t14);
  line-height: 1.7;
  color: var(--k8-text-dim);
}

.page-faq .faq-block__list {
  display: grid;
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--k8-line);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: var(--k8-s12);
  padding: var(--k8-s16) 0;
  list-style: none;
  cursor: pointer;
  font-size: var(--k8-t16);
  font-weight: 700;
  line-height: 1.6;
  color: var(--k8-text);
  transition: color 0.18s var(--k8-ease);
}

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

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

.page-faq .faq-item__q:hover,
.page-faq .faq-item[open] .faq-item__q {
  color: var(--k8-accent);
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-size: var(--k8-t12);
  letter-spacing: 0.06em;
  color: var(--k8-text-dim);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  align-self: center;
  width: 16px;
  height: 16px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--k8-accent);
  transition: transform 0.2s var(--k8-ease), opacity 0.2s var(--k8-ease);
}

.page-faq .faq-item__mark::before {
  width: 14px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  width: 2px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  position: relative;
  padding: 0 0 var(--k8-s24) calc(var(--k8-s32) + var(--k8-s8));
  font-size: var(--k8-t16);
  line-height: 1.78;
  color: var(--k8-text-dim);
}

.page-faq .faq-item__a::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 6px;
  bottom: var(--k8-s24);
  width: 2px;
  background: linear-gradient(180deg, var(--k8-accent), transparent);
}

.page-faq .faq-item__a p {
  margin: 0 0 0.75em;
}

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

.page-faq .faq-item__a ol {
  display: grid;
  gap: 6px;
  margin: 0.2em 0 0.75em;
  padding-left: 1.3em;
}

.page-faq .faq-item__a li::marker {
  color: var(--k8-accent);
  font-weight: 700;
}

.page-faq .faq-item__a strong {
  font-weight: 700;
  color: var(--k8-text);
}

.page-faq .faq-item__a a {
  color: var(--k8-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0;
  padding: var(--k8-s8);
  background: var(--k8-surface);
  box-shadow: inset 0 0 0 1px var(--k8-border);
  clip-path: polygon(
    0 0,
    calc(100% - 14px) 0,
    100% 14px,
    100% 100%,
    14px 100%,
    0 calc(100% - 14px)
  );
}

.page-faq .faq-figure--paper {
  background: var(--k8-paper);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.page-faq .faq-figure figcaption {
  margin-top: var(--k8-s8);
  padding: 0 4px 2px;
  font-family: var(--k8-font-mono);
  font-size: var(--k8-t12);
  line-height: 1.55;
  color: var(--k8-text-dim);
}

.page-faq .faq-figure--paper figcaption {
  color: var(--k8-ink);
}

.page-faq .faq-block__media {
  margin-top: var(--k8-s24);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 216px;
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-block--media {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 296px;
    grid-template-areas:
      "head media"
      "list media";
    column-gap: var(--k8-s32);
    align-items: start;
  }

  .page-faq .faq-block--media .faq-block__head {
    grid-area: head;
  }

  .page-faq .faq-block--media .faq-block__list {
    grid-area: list;
  }

  .page-faq .faq-block--media .faq-block__media {
    grid-area: media;
    margin-top: 0;
    position: sticky;
    top: 148px;
  }

  .page-faq .faq-item__q {
    padding-right: var(--k8-s8);
  }
}

/* ---------- 小屏收敛 ---------- */
@media (max-width: 640px) {
  .page-faq {
    --faq-cut: 16px;
  }

  .page-faq .faq-index {
    top: 60px;
    margin: var(--k8-s24) 0;
  }

  .page-faq .faq-hero__frame {
    padding: 24px 18px;
  }

  .page-faq .faq-hero__frame::after {
    display: none;
  }

  .page-faq .faq-item__q {
    gap: var(--k8-s8);
  }

  .page-faq .faq-item__a {
    padding-left: 32px;
  }

  .page-faq .faq-item__a::before {
    left: 8px;
  }

  .page-faq .faq-body {
    gap: var(--k8-s32);
  }
}