.page-faq {
  --faq-index-w: 240px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 4vw, 2.5rem) 0 clamp(1.5rem, 4vw, 2.75rem);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 52px 52px;
  opacity: .38;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .55), transparent 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .55), transparent 72%);
}

.page-faq .faq-hero .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__head {
  margin-top: clamp(1rem, 3vw, 1.75rem);
}

.page-faq .faq-hero__title {
  margin: .55rem 0 0;
  font-size: clamp(1.85rem, 5.2vw, 3.3rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--blue-900);
}

.page-faq .faq-hero__title::after {
  content: "";
  display: block;
  width: 68px;
  height: 6px;
  margin-top: 1.1rem;
  border-radius: 3px;
  background: var(--gold);
}

.page-faq .faq-hero__lede {
  margin: 1.15rem 0 0;
  color: var(--gray);
}

.page-faq .faq-hero__meta {
  margin: 1.35rem 0 0;
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--blue-600);
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  padding-bottom: var(--section-y);
}

.page-faq .faq-layout > * {
  min-width: 0;
}

/* ---------- 主题索引：窄屏横向滑动 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 .5rem;
  font-size: .74rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-faq .faq-index__list {
  display: flex;
  gap: .5rem;
  margin: 0;
  padding: 0 0 .4rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 4px;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: .45rem;
  flex: 0 0 auto;
  padding: .58rem .95rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--blue-800);
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-index__num {
  font-size: .72rem;
  color: var(--gold);
  letter-spacing: .08em;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--blue-800);
  background: var(--blue-800);
  color: var(--white);
}

.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link:focus-visible .faq-index__num {
  color: var(--gold-soft);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--sand);
}

.page-faq .faq-figure .media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-figure .media__caption {
  padding: .7rem 1rem;
  border-top: 1px solid var(--line);
  background: var(--white);
  font-size: .84rem;
  color: var(--gray);
}

/* ---------- 问题组 ---------- */
.page-faq .faq-group {
  padding: clamp(1.5rem, 4vw, 2.5rem) 0;
  scroll-margin-top: 6.5rem;
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
}

.page-faq .faq-group__title {
  margin: .35rem 0 .6rem;
  font-size: clamp(1.3rem, 2.8vw, 1.9rem);
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--blue-900);
}

.page-faq .faq-group__note {
  margin: 0;
  padding-left: .8rem;
  border-left: 3px solid var(--gold);
  font-size: .95rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .faq-group__note a {
  color: var(--blue-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-group__note a:hover {
  color: var(--gold);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: .7rem;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
  transition: border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--line-strong);
}

.page-faq .faq-item[open] {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: 1rem 1rem 1rem 1.15rem;
  cursor: pointer;
  list-style: none;
  font-weight: 800;
  line-height: 1.55;
  color: var(--ink);
}

.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(--gold);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::before {
  transform: scaleY(1);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  padding-top: .22rem;
  font-size: .76rem;
  letter-spacing: .07em;
  color: var(--blue-600);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: .12rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: background-color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--blue-800);
  transform: translate(-50%, -50%);
  transition: opacity 160ms var(--ease), transform 200ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__mark {
  background: var(--gold);
  border-color: var(--gold);
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--blue-900);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(90deg) scaleX(.2);
}

.page-faq .faq-item__a {
  padding: 0 1.15rem 1.15rem 1.15rem;
  border-top: 1px solid var(--line);
  margin-top: .1rem;
  padding-top: .95rem;
  color: var(--gray);
  animation: faq-answer-in 220ms var(--ease);
}

.page-faq .faq-item__a p {
  margin: 0;
  line-height: 1.85;
}

.page-faq .faq-item__a p + p {
  margin-top: .7rem;
}

.page-faq .faq-item__a a {
  color: var(--blue-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover {
  color: var(--gold);
}

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

/* ---------- 联系渠道面板 ---------- */
.page-faq .faq-channels {
  display: grid;
  gap: 1px;
  margin-top: clamp(1.5rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line);
}

.page-faq .faq-channel {
  padding: 1.1rem 1.15rem;
  background: var(--white);
}

.page-faq .faq-channel__label {
  margin: 0 0 .45rem;
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-faq .faq-channel__value {
  margin: 0 0 .35rem;
  font-weight: 800;
  font-size: 1rem;
  color: var(--blue-800);
  word-break: break-all;
}

.page-faq .faq-channel__value a {
  color: var(--blue-800);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-channel__value a:hover {
  color: var(--gold);
}

.page-faq .faq-channel__note {
  margin: 0;
  font-size: .85rem;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-item__q {
    padding: 1.15rem 1.25rem 1.15rem 1.35rem;
  }

  .page-faq .faq-item__a {
    padding-left: 1.35rem;
    padding-right: 1.35rem;
  }
}

/* ---------- 桌面：左栏索引常驻 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero__head {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(1.75rem, 4vw, 3.5rem);
    align-items: end;
    margin-top: clamp(1.5rem, 4vw, 2.75rem);
  }

  .page-faq .faq-hero__title {
    margin-top: .6rem;
  }

  .page-faq .faq-hero__lede {
    margin-top: 0;
    padding-bottom: .4rem;
  }

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

  .page-faq .faq-index {
    position: sticky;
    top: 6.5rem;
    padding: 1.1rem 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: var(--shadow-1);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: .2rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    width: 100%;
    justify-content: flex-start;
    padding: .6rem .7rem;
    border: 0;
    border-radius: 10px;
    background: transparent;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: var(--sand);
    color: var(--blue-900);
  }

  .page-faq .faq-index__link:hover .faq-index__num,
  .page-faq .faq-index__link:focus-visible .faq-index__num {
    color: var(--gold);
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1200px) {
  .page-faq .faq-group__head {
    display: grid;
    grid-template-columns: minmax(0, .42fr) minmax(0, .58fr);
    gap: clamp(1rem, 3vw, 2.5rem);
    align-items: start;
  }

  .page-faq .faq-group__head .eyebrow {
    grid-column: 1;
  }

  .page-faq .faq-group__title {
    grid-column: 1;
    margin: 0;
  }

  .page-faq .faq-group__note {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
    margin: 0;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__q::before,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}