.page-faq {
  --faq-cut: 26px;
  background: var(--ink);
  color: var(--on-surface);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(84px, 10vw, 104px);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--on-surface-muted);
}

.page-faq .breadcrumb a {
  color: var(--on-surface-muted);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan);
}

.page-faq .breadcrumb span[aria-current] {
  color: var(--cyan);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(24px, 4vw, 40px) clamp(36px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(53, 240, 200, .14), transparent 58%),
    radial-gradient(90% 70% at 94% 6%, rgba(255, 179, 71, .10), transparent 60%),
    var(--ink);
}

.page-faq .faq-hero__top {
  max-width: 68ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 18px;
  font-family: var(--font-sans);
  font-size: clamp(2.1rem, 7vw, 4.4rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -.01em;
  color: var(--mist-bright);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 40px);
}

.page-faq .faq-index {
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-panel);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--sage);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__item a {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 11px 8px;
  border-bottom: 1px dashed rgba(141, 163, 156, .3);
  border-radius: 8px;
  color: var(--on-surface);
  text-decoration: none;
  transition: background .2s ease, transform .2s ease, color .2s ease;
}

.page-faq .faq-index__item:last-child a {
  border-bottom: 0;
}

.page-faq .faq-index__item a:hover,
.page-faq .faq-index__item a:focus-visible {
  background: rgba(53, 240, 200, .08);
  transform: translateX(3px);
  color: var(--cyan);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
}

.page-faq .faq-index__name {
  font-size: 15px;
  font-weight: 600;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sage);
}

.page-faq .faq-index__fig {
  margin: 20px 0 0;
  border-radius: 12px;
  overflow: hidden;
}

.page-faq .faq-index__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

/* ---------- 首屏右侧路径面板 ---------- */
.page-faq .route-panel {
  padding: clamp(20px, 3vw, 34px);
  height: 100%;
}

.page-faq .route-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .route-panel__label {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .route-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .route-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding-block: clamp(16px, 2.4vw, 22px);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .route-step:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .route-step__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  line-height: 1;
  color: rgba(53, 240, 200, .55);
}

.page-faq .route-step__title {
  margin: 0 0 6px;
  font-size: clamp(16px, 2vw, 18px);
  font-weight: 700;
  color: var(--mist-bright);
}

.page-faq .route-step__text {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-surface-muted);
}

.page-faq .route-step__link,
.page-faq .qa__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 200, .4);
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease, gap .2s ease;
}

.page-faq .route-step__link::after,
.page-faq .qa__link::after {
  content: "→";
  font-family: var(--font-mono);
}

.page-faq .route-step__link:hover,
.page-faq .qa__link:hover,
.page-faq .route-step__link:focus-visible,
.page-faq .qa__link:focus-visible {
  color: var(--mist-bright);
  border-color: var(--cyan);
  gap: 12px;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding-block: clamp(34px, 5vw, 68px);
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-group__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 3vw, 36px);
}

.page-faq .faq-group__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 64px);
  font-weight: 700;
  line-height: .9;
  color: rgba(53, 240, 200, .26);
}

.page-faq .faq-group__title {
  margin: 8px 0 10px;
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--mist-bright);
}

.page-faq .faq-group__note {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-surface-muted);
}

.page-faq .qa {
  border-left: 2px solid transparent;
  border-bottom: 1px solid var(--hairline);
  border-radius: 0 12px 12px 0;
  transition: border-color .2s ease, background .2s ease;
}

.page-faq .qa:hover {
  border-left-color: var(--cyan-deep);
}

.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: rgba(53, 240, 200, .045);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 16px 16px 16px 14px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--on-surface);
}

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

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

.page-faq .qa__q::after {
  content: "+";
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 500;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
  color: var(--amber);
}

.page-faq .qa__index {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--sage);
}

.page-faq .qa__a {
  display: grid;
  gap: 12px;
  padding: 0 16px 18px 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-surface-muted);
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 62ch;
}

.page-faq .qa__link {
  justify-self: start;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-tail {
  padding-block: clamp(36px, 6vw, 76px);
  background: linear-gradient(180deg, rgba(7, 26, 23, 0), rgba(14, 43, 38, .92));
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-tail__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 40px);
  align-items: center;
}

.page-faq .faq-tail__fig {
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.page-faq .faq-tail__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 5;
  object-fit: cover;
}

.page-faq .faq-tail__title {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--mist-bright);
}

.page-faq .faq-tail__text {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-surface-muted);
  max-width: 56ch;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-index__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 8px;
  }

  .page-faq .faq-index__item a {
    border-bottom: 1px dashed rgba(141, 163, 156, .3);
  }

  .page-faq .faq-index__fig {
    margin-top: 22px;
  }

  .page-faq .faq-index__fig img {
    aspect-ratio: 16 / 9;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, .42fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-index__fig {
    margin-top: 24px;
  }

  .page-faq .faq-index__fig img {
    aspect-ratio: 4 / 5;
  }

  .page-faq .faq-group__grid {
    grid-template-columns: minmax(0, .34fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-group__meta {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-index {
    padding: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__item a,
  .page-faq .qa,
  .page-faq .route-step__link,
  .page-faq .qa__link {
    transition: none;
  }

  .page-faq .faq-index__item a:hover,
  .page-faq .faq-index__item a:focus-visible {
    transform: none;
  }
}