.page-faq {
  --faq-rail: 250px;
  --faq-item-bg: rgba(13, 34, 61, 0.52);
  background-color: var(--ky-night);
  color: var(--ky-white);
  overflow-x: clip;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 5vw, 56px) 0 clamp(30px, 5vw, 64px);
  background:
    radial-gradient(115% 88% at 88% 4%, rgba(255, 107, 26, 0.16), transparent 60%),
    radial-gradient(90% 70% at 6% 92%, rgba(57, 255, 136, 0.06), transparent 62%),
    linear-gradient(165deg, var(--ky-steppe) 0%, var(--ky-night) 68%);
  border-bottom: 1px solid var(--ky-line-soft);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--ky-orange), transparent);
  opacity: 0.5;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .ky-breadcrumb {
  margin: 0 0 18px;
}

.page-faq .faq-hero__text h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 6.2vw, 58px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--ky-white);
}

.page-faq .faq-hero__lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 40ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--ky-mist);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ky-line-faint);
  border: 1px solid var(--ky-line-faint);
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(7, 20, 38, 0.86);
}

.page-faq .faq-fact__k {
  font-family: var(--ky-font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--ky-orange);
  letter-spacing: 0.02em;
}

.page-faq .faq-fact__v {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ky-mist);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--ky-line);
  background: linear-gradient(150deg, var(--ky-ink), var(--ky-night));
}

.page-faq .faq-hero__media .ky-media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* 主体布局 */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(32px, 5vw, 68px);
  padding-bottom: clamp(36px, 6vw, 80px);
}

/* 分类索引 */
.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--ky-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--ky-mist);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--ky-line-soft);
  background: rgba(13, 34, 61, 0.45);
  color: var(--ky-white);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.22s var(--ky-ease), color 0.22s var(--ky-ease),
    background-color 0.22s var(--ky-ease);
}

.page-faq .faq-rail__no {
  font-family: var(--ky-font-mono);
  font-size: 12px;
  color: var(--ky-orange);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--ky-orange);
  color: var(--ky-orange);
  background: rgba(255, 107, 26, 0.08);
}

/* 问答分组 */
.page-faq .faq-group {
  border-top: 1px solid var(--ky-line-soft);
  padding-top: clamp(20px, 3vw, 30px);
  margin-bottom: clamp(34px, 5vw, 58px);
}

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

.page-faq .faq-group__no {
  margin: 0;
  font-family: var(--ky-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--ky-orange);
}

.page-faq .faq-group__head h2 {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ky-white);
}

.page-faq .faq-group__summary {
  margin: 14px 0 clamp(20px, 3vw, 30px);
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ky-mist);
}

.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 3vw, 26px);
  max-width: 460px;
  border: 1px solid var(--ky-line-soft);
  background: linear-gradient(150deg, rgba(18, 58, 94, 0.6), rgba(7, 20, 38, 0.9));
}

.page-faq .faq-figure .ky-media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  opacity: 0.92;
}

/* 手风琴条目 */
.page-faq .faq-item {
  border: 1px solid var(--ky-line-faint);
  border-bottom: none;
  background: var(--faq-item-bg);
  transition: background-color 0.24s var(--ky-ease);
}

.page-faq .faq-item:last-of-type {
  border-bottom: 1px solid var(--ky-line-faint);
}

.page-faq .faq-item[open] {
  background: rgba(18, 58, 94, 0.42);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 18px 17px 21px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ky-white);
}

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

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--ky-line);
  transition: background-color 0.24s var(--ky-ease);
}

.page-faq .faq-item[open] .faq-item__q::before {
  background: var(--ky-orange);
}

.page-faq .faq-item__q:hover {
  color: var(--ky-amber);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 17px;
  height: 17px;
  margin-top: 4px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--ky-amber);
  transition: transform 0.24s var(--ky-ease), background-color 0.24s var(--ky-ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  right: 0;
  top: 8px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 1.5px;
}

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

.page-faq .faq-item__a {
  padding: 0 20px 20px 21px;
  border-top: 1px solid var(--ky-line-faint);
  padding-top: 14px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.88;
  color: var(--ky-mist);
}

.page-faq .faq-item__a a {
  color: var(--ky-amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 162, 77, 0.45);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--ky-orange);
  border-bottom-color: var(--ky-orange);
}

.page-faq .faq-em {
  font-family: var(--ky-font-mono);
  font-weight: 700;
  font-size: 14.5px;
  color: var(--ky-green);
  letter-spacing: 0.01em;
}

/* 收尾引导 */
.page-faq .faq-cta {
  border-top: 1px solid var(--ky-line-soft);
  background:
    linear-gradient(115deg, rgba(255, 107, 26, 0.14), transparent 58%),
    linear-gradient(180deg, var(--ky-ink), var(--ky-night));
  padding: clamp(34px, 6vw, 72px) 0;
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-faq .faq-cta__text h2 {
  margin: 10px 0 0;
  font-size: clamp(22px, 3.6vw, 38px);
  font-weight: 800;
  line-height: 1.14;
  color: var(--ky-white);
}

.page-faq .faq-cta__text p {
  margin: 14px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ky-mist);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-cta__actions .ky-btn {
  text-decoration: none;
}

/* 平板及以上 */
@media (min-width: 700px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 桌面：左索引 + 右问答 */
@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding-top: clamp(40px, 5vw, 72px);
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--ky-header-h) + 24px);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    justify-content: flex-start;
    width: 100%;
    padding: 11px 14px;
    white-space: normal;
  }

  .page-faq .faq-item__q {
    font-size: 16.5px;
    padding: 19px 22px 19px 24px;
  }

  .page-faq .faq-item__a {
    padding: 16px 26px 22px 24px;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}