.page-faq {
  --faq-hair: rgba(28, 62, 107, .85);
  --faq-card: var(--bg-mid);
  --faq-console: var(--bg-console);
  background: var(--bg-deep);
  color: var(--ice);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-faq .shell {
  width: var(--shell);
  margin-inline: auto;
  min-width: 0;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: 18px;
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-faq .breadcrumb a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease-out), border-color .2s var(--ease-out);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(26px, 5vw, 54px) 0 clamp(38px, 6vw, 78px);
}

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

.page-faq .faq-hero__kicker {
  color: var(--cyan);
  margin: 0;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(1.95rem, 7.2vw, 4rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--ice);
}

.page-faq .faq-hero__desc {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--edge);
  background: var(--faq-card);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.page-faq .faq-hero__figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--edge);
  color: var(--cyan-dim);
}

/* ---------- 故障分类索引 ---------- */
.page-faq .faq-index {
  padding: 0 0 clamp(34px, 5vw, 62px);
}

.page-faq .faq-index__head {
  display: grid;
  gap: 10px;
  padding-top: clamp(24px, 3vw, 40px);
  border-top: 1px solid var(--edge);
  margin-bottom: 24px;
}

.page-faq .faq-index__title {
  margin: 4px 0 0;
  font-size: clamp(1.4rem, 3.6vw, 2.05rem);
  line-height: 1.2;
  font-weight: 800;
}

.page-faq .faq-index__note {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 4px 0 10px;
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__item {
  flex: 0 0 min(74vw, 244px);
  scroll-snap-align: start;
}

.page-faq .faq-index__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 148px;
  padding: 16px;
  border: 1px solid var(--edge);
  background: var(--faq-card);
  color: var(--ice);
  text-decoration: none;
  transition: border-color .2s var(--ease-out), background .2s var(--ease-out), box-shadow .2s var(--ease-out);
}

.page-faq .faq-index__card:hover,
.page-faq .faq-index__card:focus-visible {
  border-color: var(--cyan);
  background: var(--faq-console);
  box-shadow: inset 0 0 0 1px var(--cyan);
  outline: none;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-faq .faq-index__name {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
}

.page-faq .faq-index__meta {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--steel);
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-block {
  padding: clamp(42px, 6.5vw, 84px) 0;
  border-top: 1px solid var(--edge);
}

.page-faq .faq-block__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 42px);
}

.page-faq .faq-block__aside {
  min-width: 0;
}

.page-faq .faq-block__title {
  margin: 10px 0 0;
  font-size: clamp(1.5rem, 3.8vw, 2.15rem);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-faq .faq-block__intro {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-faq .faq-block__figure {
  margin: 22px 0 0;
  border: 1px solid var(--edge);
  background: var(--faq-card);
}

.page-faq .faq-block__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-block__body {
  min-width: 0;
}

/* ---------- 可折叠问答 ---------- */
.page-faq .qa {
  border: 1px solid var(--edge);
  background: var(--faq-card);
  margin-bottom: 14px;
  transition: border-color .22s var(--ease-out), background .22s var(--ease-out);
}

.page-faq .qa[open] {
  background: var(--faq-console);
  border-color: var(--edge-lit);
}

.page-faq .qa__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__no {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ice);
}

.page-faq .qa__chev {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .22s var(--ease-out), margin-top .22s var(--ease-out);
}

.page-faq .qa[open] .qa__chev {
  transform: rotate(-135deg);
  margin-top: 10px;
}

.page-faq .qa__body {
  padding: 6px 16px 18px;
  border-top: 1px dashed var(--faq-hair);
}

.page-faq .qa__step {
  padding: 12px 0;
  border-bottom: 1px dashed var(--faq-hair);
}

.page-faq .qa__step:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.page-faq .qa__step-key {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan-dim);
}

.page-faq .qa__step-val {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ice);
}

.page-faq .qa__step--switch {
  padding-left: 12px;
  border-left: 2px solid var(--lava);
}

.page-faq .qa__step--switch .qa__step-key {
  color: var(--lava);
}

/* ---------- 人工通道 ---------- */
.page-faq .faq-contact-wrap {
  background: var(--bg-mid);
}

.page-faq .faq-contact__head {
  max-width: 68ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-contact__intro {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 16px;
}

.page-faq .faq-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--edge);
  background: var(--bg-deep);
}

.page-faq .faq-card--accent {
  border-color: var(--lava);
  box-shadow: inset 3px 0 0 var(--lava), var(--shadow-hard);
}

.page-faq .faq-card__label {
  margin: 0;
  color: var(--cyan);
}

.page-faq .faq-card--accent .faq-card__label {
  color: var(--lava);
}

.page-faq .faq-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 16px);
  line-height: 1.6;
  font-weight: 700;
  color: var(--ice);
  word-break: break-word;
}

.page-faq .faq-card__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .faq-contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-index__head {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    align-items: end;
    gap: 8px 34px;
  }

  .page-faq .faq-index__head .label {
    grid-column: 1 / -1;
  }

  .page-faq .faq-index__list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__item {
    flex: initial;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: 40px;
  }

  .page-faq .faq-hero__figure {
    transform: translateY(18px);
  }

  .page-faq .faq-index__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-block__grid {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-faq .faq-block--flip .faq-block__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }

  .page-faq .faq-block--flip .faq-block__aside {
    order: 2;
  }

  .page-faq .faq-block--flip .faq-block__body {
    order: 1;
  }

  .page-faq .faq-block__aside {
    position: sticky;
    top: 92px;
  }

  .page-faq .qa__head {
    padding: 18px 22px;
  }

  .page-faq .qa__body {
    padding: 8px 22px 22px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-hero__title {
    max-width: 15ch;
  }
}