.page-faq {
  --faq-gap: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(18px, 3vw, 32px) 0 clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(28px, 5.2vw, 46px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  color: var(--c-text-2);
}

.page-faq .faq-hero__facts {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-text-2);
}

.page-faq .faq-hero__facts .mono {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-cyan);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .figure__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--c-plate);
}

.page-faq .figure__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.86) brightness(0.76);
}

.page-faq .figure__corner {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 18px;
  height: 18px;
  border-top: 2px solid var(--c-cyan);
  border-left: 2px solid var(--c-cyan);
}

.page-faq .figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-text-2);
}

.page-faq .faq-hero__figure .figure__frame {
  aspect-ratio: 16 / 10;
}

.page-faq .faq-contact__figure .figure__frame {
  aspect-ratio: 10 / 7;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(26px, 4vw, 52px);
}

/* ---------- 左侧分组目录 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-text-2);
}

.page-faq .faq-index__list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  font: inherit;
  text-align: left;
  cursor: pointer;
  color: var(--c-text-2);
  background: linear-gradient(90deg, rgba(30, 37, 44, 0.7), rgba(30, 37, 44, 0.24));
  border: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  color: var(--c-text);
  border-left-color: var(--c-wine);
}

.page-faq .faq-index__item[aria-selected="true"] {
  color: var(--c-text);
  border-left-color: var(--c-red);
  background: linear-gradient(90deg, rgba(200, 16, 46, 0.22), rgba(30, 37, 44, 0.24));
}

.page-faq .faq-index__num {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-cyan);
}

.page-faq .faq-index__label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-group[hidden] {
  display: none;
}

.page-faq .faq-group + .faq-group {
  margin-top: 36px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: clamp(14px, 2vw, 22px);
  row-gap: 4px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group__num {
  grid-row: 1 / span 2;
  margin: 0;
  font-size: clamp(34px, 6vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-red);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-faq .faq-group__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-text-2);
}

.page-faq .qa-list {
  margin: 0;
  padding: 0;
}

.page-faq .qa {
  position: relative;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: var(--c-cyan);
  opacity: 0;
  transition: opacity 160ms ease;
}

.page-faq .qa__q {
  margin: 0 0 8px;
  padding-left: 14px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-faq .qa__a {
  margin: 0;
  padding-left: 14px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-text-2);
}

.page-faq .qa__a .mono {
  font-size: 15px;
  color: var(--c-text);
}

@media (hover: hover) {
  .page-faq .qa:hover::before {
    opacity: 1;
  }
}

/* ---------- 去处链接 ---------- */
.page-faq .faq-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-text-2);
}

.page-faq .faq-note a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-faq .faq-go {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  text-decoration: none;
  border: 1px solid var(--line-cyan);
  background: linear-gradient(90deg, rgba(47, 243, 217, 0.1), rgba(30, 37, 44, 0.22));
  transition: border-color 160ms ease, background 160ms ease;
}

.page-faq .faq-go:hover,
.page-faq .faq-go:focus-visible {
  border-color: var(--c-cyan);
  background: linear-gradient(90deg, rgba(47, 243, 217, 0.2), rgba(30, 37, 44, 0.32));
}

.page-faq .faq-go__arrow {
  font-size: 16px;
  color: var(--c-cyan);
  transition: transform 160ms ease;
}

.page-faq .faq-go:hover .faq-go__arrow,
.page-faq .faq-go:focus-visible .faq-go__arrow {
  transform: translateX(4px);
}

.page-faq .faq-contact__figure {
  margin: 26px 0 0;
  max-width: 460px;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-contact__figure {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 20px;
    align-items: center;
    max-width: none;
  }

  .page-faq .faq-contact__figure .figure__cap {
    margin-top: 0;
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.8fr);
    align-items: end;
  }

  .page-faq .faq-shell {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-index__list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-index__item {
    padding: 13px 15px;
  }

  .page-faq .faq-index__label {
    font-size: 15px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa::before,
  .page-faq .faq-go__arrow,
  .page-faq .faq-index__item {
    transition: none;
  }

  .page-faq .faq-go:hover .faq-go__arrow,
  .page-faq .faq-go:focus-visible .faq-go__arrow {
    transform: none;
  }
}