.page-faq {
  --faq-gap: clamp(22px, 3.4vw, 40px);
  --faq-pad-y: clamp(30px, 5vw, 64px);
  background: var(--ink-950);
  color: var(--paper);
  padding-bottom: clamp(52px, 7vw, 104px);
}

/* 面包屑 */
.page-faq .crumbs {
  padding: clamp(14px, 2.4vw, 22px) 0 0;
}
.page-faq .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--con-400);
}
.page-faq .crumbs__link {
  color: var(--con-100);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}
.page-faq .crumbs__link:hover,
.page-faq .crumbs__link:focus-visible {
  color: var(--lime-400);
  border-color: var(--lime-400);
}
.page-faq .crumbs__sep {
  color: var(--con-700);
}

/* 顶部横幅 */
.page-faq .faq-banner {
  margin-top: clamp(16px, 2.6vw, 28px);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-banner__grid {
  display: grid;
  gap: var(--faq-gap);
  padding: var(--faq-pad-y) 0;
}
.page-faq .kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--con-400);
}
.page-faq .kicker__key {
  color: var(--lime-400);
  letter-spacing: .08em;
}
.page-faq .faq-banner h1 {
  margin: 0 0 18px;
  font-size: clamp(32px, 7.4vw, 66px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 20em;
}
.page-faq .faq-banner .lead {
  margin: 0;
  max-width: 34em;
  color: var(--con-100);
  font-size: clamp(15.5px, 1.6vw, 18px);
  line-height: 1.75;
}
.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}
.page-faq .stat__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(19px, 2.6vw, 28px);
  letter-spacing: .04em;
  color: var(--lime-400);
}
.page-faq .stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--con-400);
}

/* 图片容器 */
.page-faq .media {
  margin: 0;
}
.page-faq .faq-banner__media .media__frame {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.page-faq .faq-index__media .media__frame {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.page-faq .media__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .media__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--con-400);
}
.page-faq .media__cap-key {
  font-family: var(--mono);
  letter-spacing: .06em;
  color: var(--rust-300);
  margin-right: 8px;
}

/* 主体布局：左侧问答、右侧组别索引 */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-top: var(--faq-pad-y);
}
.page-faq .faq-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.page-faq .faq-index__cap {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--con-400);
  text-transform: uppercase;
}
.page-faq .faq-index__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}
.page-faq .faq-index__item {
  flex: 0 0 auto;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--con-100);
  text-decoration: none;
  font-size: 13.5px;
  white-space: nowrap;
  transition: border-color .25s var(--ease), color .25s var(--ease), background-color .25s var(--ease);
}
.page-faq .faq-index__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--lime-400);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--lime-400);
  background: rgba(200, 255, 61, .07);
  color: var(--lime-400);
}
.page-faq .faq-index__media {
  display: none;
  margin: 22px 0 0;
}

/* 问答分组 */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(34px, 5vw, 58px);
}
.page-faq .faq-group {
  border-top: 1px solid var(--line);
  padding-top: clamp(18px, 2.4vw, 26px);
  scroll-margin-top: calc(var(--bar) + 24px);
}
.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 10px;
  font-size: clamp(20px, 2.8vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.page-faq .faq-group__num {
  flex: none;
  padding: 3px 7px;
  border: 1px solid rgba(200, 255, 61, .45);
  border-radius: 2px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--lime-400);
}
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.55;
  transition: color .25s var(--ease);
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q:hover {
  color: var(--lime-400);
}
.page-faq .qa__num {
  flex: none;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--con-700);
}
.page-faq .qa__text {
  flex: 1 1 auto;
}
.page-faq .qa__sign {
  position: relative;
  flex: none;
  align-self: center;
  width: 13px;
  height: 13px;
  margin-left: auto;
  transition: transform .25s var(--ease);
}
.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--lime-400);
}
.page-faq .qa__sign::before {
  left: 0;
  top: 6px;
  width: 13px;
  height: 1.5px;
}
.page-faq .qa__sign::after {
  top: 0;
  left: 6px;
  width: 1.5px;
  height: 13px;
}
.page-faq .qa[open] .qa__sign {
  transform: rotate(45deg);
}
.page-faq .qa[open] .qa__q {
  color: var(--lime-400);
}
.page-faq .qa__a {
  max-width: 60ch;
  padding: 0 0 18px 32px;
  color: var(--con-400);
  font-size: 15.5px;
  line-height: 1.75;
}
.page-faq .qa__a p {
  margin: 0;
}
.page-faq .qa__a .u-link {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, .45);
  transition: border-color .25s var(--ease);
}
.page-faq .qa__a .u-link:hover,
.page-faq .qa__a .u-link:focus-visible {
  border-color: var(--lime-400);
}

/* 收尾：联系与延伸入口 */
.page-faq .faq-contact {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  margin-top: clamp(44px, 6vw, 76px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line);
}
.page-faq .faq-contact__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1.3;
}
.page-faq .faq-contact__text {
  margin: 0 0 20px;
  max-width: 46ch;
  color: var(--con-400);
  font-size: 15.5px;
  line-height: 1.75;
}
.page-faq .contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}
.page-faq .contact-list__item {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .contact-list__key {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--con-700);
}
.page-faq .contact-list__val {
  color: var(--paper);
  font-size: 15px;
  word-break: break-word;
}
.page-faq .contact-list__note {
  grid-column: 2;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--con-400);
}
.page-faq .faq-links {
  align-self: start;
  border-left: 2px solid var(--rust-500);
  padding-left: clamp(14px, 2vw, 20px);
}
.page-faq .faq-links .faq-index__cap {
  color: var(--rust-300);
}
.page-faq .index-strip {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .index-strip__item a {
  display: inline-block;
  padding: 6px 0;
  color: var(--con-100);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  transition: color .25s var(--ease), border-color .25s var(--ease), padding-left .25s var(--ease);
}
.page-faq .index-strip__item a:hover,
.page-faq .index-strip__item a:focus-visible {
  color: var(--lime-400);
  border-color: var(--lime-400);
  padding-left: 6px;
}

/* 平板及以上 */
@media (min-width: 760px) {
  .page-faq .faq-banner__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
  }
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }
}

/* 桌面：右侧纵向组别索引 */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 250px;
    align-items: start;
  }
  .page-faq .faq-groups {
    order: 1;
  }
  .page-faq .faq-index {
    order: 2;
    position: sticky;
    top: calc(var(--bar) + 24px);
    border-top: 0;
    padding-top: 0;
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--line);
  }
  .page-faq .faq-index__item {
    flex: 0 0 auto;
  }
  .page-faq .faq-index__link {
    position: relative;
    border-color: transparent;
    border-radius: 0;
    padding: 10px 0 10px 14px;
    background: transparent;
  }
  .page-faq .faq-index__link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: transparent;
    transition: background-color .25s var(--ease);
  }
  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: transparent;
  }
  .page-faq .faq-index__link:hover::before,
  .page-faq .faq-index__link:focus-visible::before {
    background: var(--lime-400);
  }
  .page-faq .faq-index__media {
    display: block;
  }
}

/* 减弱动效 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__sign,
  .page-faq .qa__q,
  .page-faq .faq-index__link,
  .page-faq .faq-index__link::before,
  .page-faq .index-strip__item a,
  .page-faq .crumbs__link {
    transition: none;
  }
}