.page-faq {
  --faq-line: var(--ink-500);
  --faq-line-soft: rgba(36, 64, 90, .68);
  --faq-text: #C9D5DE;
  --faq-card-bg: var(--ink-900);
  --faq-card-bg-hover: var(--ink-700);
}

/* ---------- 锚点定位 ---------- */
.page-faq .faq-terms,
.page-faq .faq-group,
.page-faq .faq-batches,
.page-faq .faq-sla,
.page-faq .faq-check,
.page-faq .faq-qa,
.page-faq .faq-install,
.page-faq .faq-cta {
  scroll-margin-top: calc(var(--header-offset) + 24px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-offset) + clamp(26px, 4.6vw, 54px)) 0 clamp(42px, 6vw, 72px);
  background:
    radial-gradient(110% 82% at 86% 0%, rgba(200, 149, 47, .17), transparent 62%),
    radial-gradient(88% 70% at 6% 100%, rgba(47, 199, 196, .10), transparent 60%),
    var(--ink-900);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(36, 64, 90, .38) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 64, 90, .38) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 82%);
  pointer-events: none;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 36px);
}

.page-faq .faq-hero__grid {
  align-items: start;
  row-gap: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero h1 {
  font-size: clamp(29px, 4.3vw, 54px);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 12px 0 20px;
  color: var(--paper-050);
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  color: var(--faq-text);
}

.page-faq .faq-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 首屏事实条 */
.page-faq .faq-facts {
  margin: 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 2px;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-facts dt {
  font-size: 14px;
  color: var(--stone-400);
}

.page-faq .faq-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .01em;
  color: var(--copper-300);
  text-align: right;
}

/* 编号卡阵 */
.page-faq .faq-cardgrid {
  margin-top: clamp(30px, 5vw, 54px);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-card {
  display: block;
  padding: 18px 18px 20px;
  background: var(--faq-card-bg);
  color: inherit;
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease);
}

.page-faq .faq-card:hover,
.page-faq .faq-card:focus-visible {
  background: var(--faq-card-bg-hover);
}

.page-faq .faq-card:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-card__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--copper-500);
  margin-bottom: 12px;
  transition: color var(--dur-fast) var(--ease);
}

.page-faq .faq-card:hover .faq-card__code,
.page-faq .faq-card:focus-visible .faq-card__code {
  color: var(--copper-300);
}

.page-faq .faq-card__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper-050);
}

.page-faq .faq-card__range {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--stone-400);
}

/* ---------- 通用图注 ---------- */
.page-faq .faq-banner {
  margin: clamp(30px, 4.6vw, 52px) 0 0;
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--faq-line);
  background: var(--ink-700);
  object-fit: cover;
}

.page-faq .faq-banner figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone-400);
}

.page-faq .faq-banner--sla {
  margin: clamp(24px, 3.6vw, 40px) 0 clamp(28px, 4vw, 44px);
}

/* ---------- 条款速查 ---------- */
.page-faq .faq-sechead {
  max-width: 74ch;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-faq .faq-sechead .lede {
  color: var(--faq-text);
  margin-top: 14px;
}

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

.page-faq .faq-group:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur-fast) var(--ease);
}

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

.page-faq .faq-group__head:hover {
  background: rgba(20, 41, 61, .62);
}

.page-faq .faq-group__head:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .faq-group__code {
  flex: 0 0 auto;
  font-size: 20px;
  letter-spacing: .1em;
  color: var(--copper-500);
}

.page-faq .faq-group__name {
  flex: 1 1 auto;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper-050);
}

.page-faq .faq-group__range {
  flex: 0 0 auto;
  font-size: 13px;
  color: var(--stone-400);
}

.page-faq .faq-group__count {
  flex: 0 0 auto;
  font-size: 13px;
  color: var(--copper-300);
}

.page-faq .faq-group__mark {
  position: relative;
  flex: 0 0 auto;
  align-self: center;
  width: 18px;
  height: 18px;
  margin-left: 4px;
}

.page-faq .faq-group__mark::before,
.page-faq .faq-group__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--copper-500);
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.page-faq .faq-group__mark::before {
  width: 16px;
  height: 1px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-group__mark::after {
  width: 1px;
  height: 16px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-group[open] .faq-group__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-group[open] .faq-group__head {
  background: rgba(20, 41, 61, .45);
}

.page-faq .faq-group__body {
  padding: 6px 4px 28px;
}

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

.page-faq .faq-clause {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 15px 2px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-clause__no {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--copper-500);
}

.page-faq .faq-clause__text {
  flex: 1 1 320px;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-text);
}

/* ---------- 批次时间轴 ---------- */
.page-faq .faq-batches .h2 {
  margin-bottom: 16px;
}

.page-faq .faq-batches .col-5 > p {
  color: var(--stone-400);
  line-height: 1.85;
  margin-bottom: 22px;
}

.page-faq .faq-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-faq .faq-tl::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--faq-line);
}

.page-faq .faq-tl__item {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 0 0 22px 56px;
}

.page-faq .faq-tl__idx {
  position: absolute;
  left: 0;
  top: 0;
  width: 42px;
  height: 30px;
  display: grid;
  place-items: center;
  background: var(--ink-900);
  border: 1px solid var(--faq-line);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--copper-500);
}

.page-faq .faq-tl__body {
  flex: 1 1 300px;
}

.page-faq .faq-tl__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper-050);
}

.page-faq .faq-tl__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--stone-400);
}

.page-faq .faq-tl__item--current .faq-tl__idx {
  border-color: var(--copper-500);
  background: var(--ink-700);
}

.page-faq .faq-tl__item--current .faq-tl__title {
  color: var(--copper-300);
}

/* ---------- 响应时限 ---------- */
.page-faq .faq-sla .lede {
  color: var(--faq-text);
  max-width: 70ch;
}

.page-faq .faq-sla .lede strong {
  color: var(--copper-300);
  font-weight: 700;
}

.page-faq .faq-scale {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-scale__item {
  position: relative;
  padding: 26px 18px 24px;
  background: var(--ink-700);
  transition: background var(--dur-fast) var(--ease);
}

.page-faq .faq-scale__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 5px;
  background: var(--ink-500);
  transition: height var(--dur-fast) var(--ease);
}

.page-faq .faq-scale__item:nth-child(1)::before { background: var(--amber-500); }
.page-faq .faq-scale__item:nth-child(2)::before { background: var(--copper-500); }
.page-faq .faq-scale__item:nth-child(3)::before { background: var(--cyan-600); }
.page-faq .faq-scale__item:nth-child(4)::before { background: var(--stone-400); }

.page-faq .faq-scale__item:hover {
  background: var(--ink-900);
}

.page-faq .faq-scale__item:hover::before {
  height: 8px;
}

.page-faq .faq-scale__num {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0 0 12px;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--copper-300);
}

.page-faq .faq-scale__num span {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--stone-400);
}

.page-faq .faq-scale__name {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper-050);
}

.page-faq .faq-scale__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone-400);
}

.page-faq .faq-sla__note {
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--amber-500);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--stone-400);
}

/* ---------- 机型自检（浅底） ---------- */
.page-faq .section--paper {
  color: var(--graphite-600);
}

.page-faq .section--paper .h2,
.page-faq .section--paper .h3 {
  color: var(--ink-900);
}

.page-faq .section--paper .lede {
  color: var(--graphite-600);
  max-width: 70ch;
}

.page-faq .faq-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: #D6DEE4;
  border-top: 2px solid var(--ink-900);
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-faq .faq-step {
  background: var(--paper-050);
  padding: 24px 20px 26px;
}

.page-faq .faq-step__no {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan-600);
  margin-bottom: 12px;
}

.page-faq .faq-step .h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--graphite-600);
}

.page-faq .faq-check__act {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: clamp(26px, 3.4vw, 40px);
}

.page-faq .faq-check__hint {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cyan-600);
}

/* ---------- 问答 ---------- */
.page-faq .faq-qa__inner {
  max-width: 860px;
}

.page-faq .faq-qa__inner .h2 {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-qa__item {
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-qa__item:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-qa__q {
  display: block;
  position: relative;
  padding: 20px 44px 20px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper-050);
  transition: color var(--dur-fast) var(--ease);
}

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

.page-faq .faq-qa__q::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--copper-500);
  transition: color var(--dur-fast) var(--ease);
}

.page-faq .faq-qa__item[open] .faq-qa__q::after {
  content: "−";
  color: var(--copper-300);
}

.page-faq .faq-qa__q:hover {
  color: var(--copper-300);
}

.page-faq .faq-qa__q:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .faq-qa__a {
  padding: 0 44px 24px 0;
}

.page-faq .faq-qa__a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--faq-text);
}

/* ---------- 安装核验 ---------- */
.page-faq .faq-install .col-4 > p {
  color: var(--stone-400);
  line-height: 1.85;
  margin-bottom: 22px;
}

.page-faq .faq-install__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-install__item {
  background: var(--ink-700);
  padding: 20px 20px 22px;
  transition: background var(--dur-fast) var(--ease);
}

.page-faq .faq-install__item:hover {
  background: var(--ink-900);
}

.page-faq .faq-install__item .tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-faq .faq-install__item .h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--paper-050);
}

.page-faq .faq-install__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone-400);
}

/* ---------- 收束 ---------- */
.page-faq .faq-cta .h2 {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-cta__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-cta__card {
  display: block;
  padding: 24px 22px 26px;
  background: var(--ink-900);
  color: inherit;
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease);
}

.page-faq .faq-cta__card:hover,
.page-faq .faq-cta__card:focus-visible {
  background: var(--ink-700);
}

.page-faq .faq-cta__card:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-cta__k {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--copper-500);
  margin-bottom: 14px;
}

.page-faq .faq-cta__card .h3 {
  margin: 0 0 10px;
  font-size: 17px;
  color: var(--paper-050);
}

.page-faq .faq-cta__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--stone-400);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .page-faq .faq-cardgrid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-cta__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-cta__card:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .page-faq .faq-steps {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-scale {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .page-faq .faq-install__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-tl__item {
    padding-left: 48px;
  }

  .page-faq .faq-tl::before {
    left: 17px;
  }

  .page-faq .faq-tl__idx {
    width: 36px;
    height: 28px;
  }
}

@media (max-width: 620px) {
  .page-faq .faq-cardgrid,
  .page-faq .faq-cta__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-cta__card:last-child {
    grid-column: auto;
  }

  .page-faq .faq-group__name {
    flex: 1 1 100%;
    order: 2;
  }

  .page-faq .faq-group__code {
    order: 1;
  }

  .page-faq .faq-group__range {
    order: 3;
  }

  .page-faq .faq-group__count {
    order: 4;
  }

  .page-faq .faq-group__mark {
    order: 5;
    margin-left: auto;
  }

  .page-faq .faq-qa__q {
    padding-right: 34px;
  }

  .page-faq .faq-qa__a {
    padding-right: 0;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-scale {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-facts > div {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .page-faq .faq-facts dd {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-group__head,
  .page-faq .faq-group__mark::before,
  .page-faq .faq-group__mark::after,
  .page-faq .faq-scale__item,
  .page-faq .faq-scale__item::before,
  .page-faq .faq-install__item,
  .page-faq .faq-cta__card,
  .page-faq .faq-qa__q,
  .page-faq .faq-qa__q::after {
    transition-duration: .01ms;
  }

  .page-faq .faq-scale__item:hover::before {
    height: 5px;
  }
}