.page-faq {
  --faq-line: rgba(201, 207, 214, 0.45);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  padding-top: clamp(22px, 4vw, 40px);
  font-family: var(--font-mono);
}

.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .crumbs li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--graphite);
}

.page-faq .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-faq .crumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.faq-hero {
  padding: clamp(26px, 4vw, 44px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--grid);
}

.faq-hero__eyebrow {
  margin: clamp(24px, 4vw, 42px) 0 0;
}

.faq-hero h1 {
  margin: 16px 0 0;
  font-size: clamp(30px, 6.2vw, 60px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  max-width: 16em;
}

.faq-hero__lead {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--mist);
}

.faq-hero__lead strong {
  color: var(--cyan);
  font-weight: 600;
}

.faq-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.faq-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink);
}

.faq-facts__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4.4vw, 42px);
  line-height: 1;
  color: var(--paper);
}

.faq-facts__label {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
}

.faq-jump a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--grid);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.faq-jump a span {
  color: var(--graphite);
  transition: color var(--fast) var(--ease);
}

.faq-jump a:hover {
  color: var(--ink-deep);
  background: var(--cyan);
  border-color: var(--cyan);
}

.faq-jump a:hover span {
  color: rgba(6, 18, 29, 0.55);
}

/* ---------- 问答分组 ---------- */
.faq-groups {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(44px, 6vw, 88px) 0 clamp(44px, 6vw, 80px);
}

.qa-group + .qa-group {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(32px, 4.5vw, 56px);
  border-top: 1px solid var(--mist);
}

.qa-group__head {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.qa-group__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-deep);
}

.qa-group__tag span {
  margin-right: 8px;
  color: var(--graphite);
}

.qa-group__head h2 {
  margin: 10px 0 0;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.34;
  letter-spacing: -0.01em;
  font-weight: 800;
}

.qa-list {
  border-top: 1px solid var(--mist);
}

.qa {
  border-bottom: 1px solid var(--mist);
}

.qa > summary {
  position: relative;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: start;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

.qa > summary::-webkit-details-marker {
  display: none;
}

.qa > summary::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--fast) var(--ease);
}

.qa[open] > summary::before,
.qa > summary:hover::before {
  transform: scaleY(1);
}

.qa__no {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

.qa__q {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  transition: color var(--fast) var(--ease);
}

.qa > summary:hover .qa__q {
  color: var(--cyan-deep);
}

.qa__glyph {
  width: 8px;
  height: 8px;
  margin-top: 7px;
  justify-self: end;
  border-right: 1px solid var(--graphite);
  border-bottom: 1px solid var(--graphite);
  transform: rotate(45deg);
  transition: transform var(--mid) var(--ease), border-color var(--fast) var(--ease);
}

.qa[open] .qa__glyph {
  transform: rotate(-135deg);
  border-color: var(--amber-deep);
}

.qa__body {
  padding: 0 0 20px;
  animation: faqIn var(--mid) var(--ease);
}

.qa__body p {
  margin: 0 0 10px;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--graphite);
}

.qa__body p:last-child {
  margin-bottom: 0;
}

.qa__key {
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  color: var(--ink);
  font-weight: 500;
}

.qa__body a {
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 143, 135, 0.45);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.qa__body a:hover {
  color: var(--ink);
  border-bottom-color: var(--amber-deep);
}

@keyframes faqIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 提问格式 ---------- */
.faq-ask {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(44px, 6vw, 88px) 0;
  border-top: 1px solid var(--grid);
}

.faq-ask__inner {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.faq-ask__eyebrow {
  margin: 0;
}

.faq-ask h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  font-weight: 800;
}

.faq-ask__lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mist);
}

.ask-fields {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--grid);
}

.ask-fields li {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--grid);
}

.ask-fields__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.ask-fields p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.faq-ask__figure {
  margin: 0;
}

.faq-ask .frame {
  border: 1px solid var(--grid);
  background: var(--ink-deep);
}

.faq-ask .frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.faq-ask .frame__cap {
  padding: 12px 14px;
  border-top: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--graphite);
}

/* ---------- 读表速查 ---------- */
.faq-spec {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(44px, 6vw, 88px) 0;
  border-top: 1px solid var(--mist);
}

.faq-spec__eyebrow {
  margin: 0;
}

.faq-spec h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  font-weight: 800;
}

.faq-spec__lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--graphite);
}

.faq-spec__figure {
  margin: clamp(24px, 3.5vw, 40px) 0 0;
}

.faq-spec .frame {
  border: 1px solid var(--mist);
}

.faq-spec .frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.faq-spec .frame__cap {
  padding: 12px 14px;
  border-top: 1px solid var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--graphite);
}

.spec-table {
  margin-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--mist);
}

.spec-row {
  display: grid;
  gap: 10px;
  padding: 20px 0;
  border-bottom: 1px solid var(--mist);
}

.spec-row__no {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--graphite);
}

.spec-row__name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.005em;
}

.spec-row__body p {
  margin: 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--graphite);
}

.spec-row__val {
  justify-self: start;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: rgba(34, 211, 197, 0.14);
  border-left: 2px solid var(--cyan);
}

.spec-row__val--amber {
  background: rgba(255, 154, 46, 0.16);
  border-left-color: var(--amber);
  color: var(--amber-deep);
}

/* ---------- 结尾 ---------- */
.faq-next {
  background: var(--ink-deep);
  color: var(--paper);
  padding: clamp(44px, 6vw, 88px) 0;
  border-top: 1px solid var(--grid);
}

.faq-next__inner {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.faq-next h2 {
  margin: 0;
  max-width: 20em;
  font-size: clamp(26px, 4.4vw, 48px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.faq-next p {
  margin: 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mist);
}

.faq-next__act {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 28px;
}

.faq-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-next__links a {
  color: var(--cyan);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 197, 0.35);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.faq-next__links a:hover {
  color: var(--paper);
  border-bottom-color: var(--amber);
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .ask-fields li {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 4px 18px;
    align-items: baseline;
  }
}

@media (min-width: 640px) {
  .qa > summary {
    grid-template-columns: 58px minmax(0, 1fr) 18px;
    gap: 16px;
    padding: 20px 0;
  }

  .qa__q {
    font-size: 17px;
  }

  .qa__body {
    padding-left: 74px;
    padding-bottom: 24px;
  }
}

@media (min-width: 760px) {
  .spec-row {
    grid-template-columns: 46px minmax(0, 1fr) 230px;
    gap: 24px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .faq-ask__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .qa__body {
    animation: none;
  }

  .qa > summary::before,
  .qa__glyph,
  .faq-jump a {
    transition: none;
  }
}