.page-faq {
  --faq-gap: clamp(18px, 2.4vw, 34px);
  --faq-card-bg: var(--charcoal-800);
  padding-block: clamp(24px, 4vw, 48px) clamp(60px, 9vw, 120px);
  color: var(--paper);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faqHero {
  padding-bottom: clamp(28px, 4vw, 52px);
}

.page-faq .faqHero .eyebrow {
  margin-top: clamp(18px, 3vw, 32px);
}

.page-faq .faqHero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 48px);
  margin-top: clamp(16px, 2.4vw, 28px);
}

.page-faq .faqHero__title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-size: clamp(34px, 6.2vw, 82px);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.page-faq .faqHero__title em {
  font-style: normal;
  color: var(--lime-400);
}

.page-faq .faqHero__intro {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 58ch;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

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

.page-faq .faqHero__meta dl {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 clamp(16px, 3vw, 30px);
  border-top: 1px solid var(--grid-line);
}

.page-faq .faqHero__meta dl > div {
  padding: 14px 0 12px;
  border-bottom: 1px solid var(--grid-line);
}

.page-faq .faqHero__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .faqHero__meta dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(17px, 1.8vw, 22px);
  color: var(--lime-400);
  letter-spacing: -0.01em;
}

.page-faq .faqHero__meta dd small {
  margin-left: 5px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faqHero__visual {
  margin-top: clamp(26px, 4vw, 50px);
}

/* ---------- 主布局 ---------- */
.page-faq .faqLayout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  margin-top: clamp(38px, 5.5vw, 76px);
}

/* ---------- 分类索引 ---------- */
.page-faq .faqIndex {
  min-width: 0;
}

.page-faq .faqIndex__title {
  margin: 0 0 12px;
}

.page-faq .faqIndex__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faqIndex__list li {
  flex: 0 0 auto;
}

.page-faq .faqIndex__link {
  display: block;
  padding: 10px 14px;
  border: 1px solid var(--grid-line);
  background: rgba(20, 23, 26, 0.6);
  color: var(--mist);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease),
    background-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faqIndex__link:hover,
.page-faq .faqIndex__link:focus-visible {
  color: var(--lime-400);
  border-color: var(--lime-400);
  background: rgba(199, 249, 74, 0.07);
  transform: translateY(-2px);
}

/* ---------- 问答分组 ---------- */
.page-faq .faqGroup {
  scroll-margin-top: 104px;
}

.page-faq .faqGroup + .faqGroup {
  margin-top: clamp(44px, 6vw, 80px);
}

.page-faq .faqGroup__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  border-top: 1px solid var(--grid-line);
  padding-top: 16px;
  margin-bottom: 18px;
}

.page-faq .faqGroup__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber-500);
}

.page-faq .faqGroup__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faqGroup__lead {
  grid-column: 2;
  margin: 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问答卡片 ---------- */
.page-faq .qaCard {
  background: var(--faq-card-bg);
  border: 1px solid var(--grid-line);
  border-left: 2px solid var(--grid-line);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease),
    transform 0.2s var(--ease);
}

.page-faq .qaCard + .qaCard {
  margin-top: 10px;
}

.page-faq .qaCard:hover {
  border-color: #3b453d;
  border-left-color: var(--lime-400);
  box-shadow: var(--shadow-float);
  transform: translateY(-2px);
}

.page-faq .qaCard[open] {
  border-left-color: var(--lime-400);
}

.page-faq .qaCard__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}

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

.page-faq .qaCard__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--lime-400);
}

.page-faq .qaCard[open] .qaCard__q::after {
  content: "–";
}

.page-faq .qaCard__q:hover,
.page-faq .qaCard__q:focus-visible {
  color: var(--lime-400);
}

.page-faq .qaCard__index {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber-500);
}

.page-faq .qaCard__a {
  padding: 0 20px 22px 46px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .qaCard__a p {
  margin: 0 0 12px;
  max-width: 64ch;
}

.page-faq .qaCard__a p:last-child {
  margin-bottom: 0;
}

.page-faq .qaCard__a a {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(199, 249, 74, 0.38);
  transition: border-color 0.18s var(--ease);
}

.page-faq .qaCard__a a:hover,
.page-faq .qaCard__a a:focus-visible {
  border-bottom-color: var(--lime-400);
}

/* ---------- 步骤序号 ---------- */
.page-faq .steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
  max-width: 64ch;
}

.page-faq .steps li {
  counter-increment: faqstep;
  position: relative;
  padding: 8px 10px 8px 46px;
  border-bottom: 1px solid rgba(42, 49, 44, 0.65);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .steps li:last-child {
  border-bottom: none;
}

.page-faq .steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 8px;
  width: 32px;
  padding: 2px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-green-900);
  background: var(--lime-400);
}

.page-faq .steps li:hover {
  background: rgba(199, 249, 74, 0.06);
  color: var(--paper);
}

/* ---------- 设备设置配图 ---------- */
.page-faq .faqGroup__figure {
  margin: 16px 0 18px;
}

/* ---------- 联络分组 ---------- */
.page-faq .faqGroup--contact .faqGroup__head {
  border-top-color: var(--amber-500);
}

.page-faq .faqGroup--contact .qaCard {
  background: linear-gradient(180deg, rgba(240, 166, 60, 0.07), rgba(20, 23, 26, 0) 55%),
    var(--faq-card-bg);
}

.page-faq .contactList {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid-line);
  border: 1px solid var(--grid-line);
}

.page-faq .contactList li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 12px 16px;
  background: var(--ink-green-900);
}

.page-faq .contactList__label {
  flex: none;
  min-width: 5.5em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .contactList__value {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--lime-400);
  word-break: break-word;
}

/* ---------- 焦点可见性 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--ice-blue);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .contactList {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1081px) {
  .page-faq .faqHero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-faq .faqHero__meta {
    padding-top: 8px;
  }

  .page-faq .faqLayout {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-faq .faqIndex {
    grid-column: 1 / span 3;
    position: sticky;
    top: 96px;
  }

  .page-faq .faqIndex__list {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 0;
    overflow: visible;
  }

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

  .page-faq .faqBody {
    grid-column: 5 / span 8;
  }
}

@media (max-width: 640px) {
  .page-faq .faqHero__meta dl {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .qaCard__q {
    padding: 14px 16px;
    font-size: 15px;
    gap: 10px;
  }

  .page-faq .qaCard__a {
    padding: 0 16px 18px 16px;
    font-size: 14.5px;
  }

  .page-faq .steps li {
    padding-left: 40px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .qaCard,
  .page-faq .faqIndex__link,
  .page-faq .steps li,
  .page-faq .qaCard__q {
    transition: none;
  }

  .page-faq .qaCard:hover,
  .page-faq .faqIndex__link:hover,
  .page-faq .faqIndex__link:focus-visible {
    transform: none;
  }
}