.page-faq {
  --faq-gap: clamp(18px, 2.6vw, 30px);
  --faq-pad: clamp(20px, 3.4vw, 42px);
  --faq-line-soft: rgba(143, 163, 184, 0.22);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq [id] {
  scroll-margin-top: 92px;
}

.page-faq .breadcrumb {
  margin: 0 0 clamp(10px, 2vw, 20px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(8px, 2vw, 20px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-faq .faq-hero__copy .display {
  margin: 10px 0 18px;
  line-height: 1.06;
}

.page-faq .faq-hero__copy .lede {
  max-width: 34em;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: clamp(16px, 2.4vw, 22px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-hero__facts .mono {
  font-size: 1.22rem;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__facts span:last-child {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-faq .faq-hero__visual {
  position: relative;
  min-width: 0;
}

.page-faq .faq-hero__visual::before {
  content: "";
  position: absolute;
  inset: 12% -6% -14% 10%;
  background: radial-gradient(58% 58% at 42% 42%, rgba(34, 211, 238, 0.22), transparent 72%);
  z-index: 0;
  pointer-events: none;
}

.page-faq .faq-hero__visual .window {
  position: relative;
  z-index: 1;
}

.page-faq .faq-index {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-faq .faq-index__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 10px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-sm);
  background: rgba(34, 211, 238, 0.06);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--gray);
}

.page-faq .faq-index__no {
  font-size: 13px;
  color: var(--cyan);
}

/* ---------- 区块标题 ---------- */
.page-faq .faq-head {
  max-width: 62ch;
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-head h2 {
  margin: 10px 0 12px;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.16;
}

.page-faq .faq-head__note {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--gray);
}

/* ---------- 分类目录 ---------- */
.page-faq .faq-catmap {
  margin: 0 0 var(--faq-gap);
  border-radius: var(--r-md);
  overflow: hidden;
}

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

.page-faq .faq-cat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 18px;
  background: var(--ink-2);
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-md);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-faq .faq-cat__no {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-faq .faq-cat h3 {
  margin: 0;
  font-size: 1.14rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-faq .faq-cat__count {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-cat p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .faq-cat__doc {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--faq-line-soft);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--gray);
}

/* ---------- 标签切换（通用） ---------- */
.page-faq .tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .tabs__btn {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  padding: 9px 15px;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

/* ---------- 高频问题 ---------- */
.page-faq .faq-questions {
  background: var(--cream);
  color: var(--brown);
  border-radius: var(--r-lg);
  padding: var(--faq-pad);
  box-shadow: var(--shadow);
}

.page-faq .faq-questions .tabs {
  margin-bottom: 22px;
}

.page-faq .faq-questions .tabs__btn {
  border: 1px solid rgba(36, 28, 21, 0.28);
  color: #4a392c;
}

.page-faq .faq-questions .tabs__btn[aria-selected="true"] {
  background: var(--ink);
  color: var(--cyan);
  border-color: var(--ink);
}

.page-faq .faq-questions__sub {
  margin: 0 0 14px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #5b4633;
}

.page-faq .accordion {
  border-top: 1px solid rgba(36, 28, 21, 0.18);
}

.page-faq .accordion__item {
  border-bottom: 1px solid rgba(36, 28, 21, 0.18);
}

.page-faq .accordion__trigger {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 2px;
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  color: var(--brown);
  cursor: pointer;
}

.page-faq .accordion__trigger:hover {
  color: var(--ink);
}

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

.page-faq .faq-q__no {
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--cyan-deep);
  padding-top: 4px;
}

.page-faq .faq-q__text {
  font-size: 1.02rem;
  line-height: 1.6;
  font-weight: 500;
}

.page-faq .accordion__arrow {
  margin-left: auto;
  flex: 0 0 auto;
  padding-top: 2px;
  color: var(--cyan-deep);
  transition: transform 0.18s var(--ease);
}

.page-faq .accordion__trigger[aria-expanded="false"] .accordion__arrow {
  transform: rotate(-90deg);
}

.page-faq .accordion__trigger[aria-expanded="false"] + .accordion__panel {
  display: none;
}

.page-faq .accordion__inner {
  padding: 0 6px 18px 40px;
  color: #3b2e24;
}

.page-faq .accordion__inner p {
  margin: 0 0 10px;
  font-size: 0.97rem;
  line-height: 1.85;
}

.page-faq .faq-q__ref {
  font-family: var(--mono);
  font-size: 12px;
  color: #7a6650;
  letter-spacing: 0.02em;
}

/* ---------- 故障排查 ---------- */
.page-faq .faq-trouble__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

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

.page-faq .faq-step {
  position: relative;
  padding: 0 0 26px 44px;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 30px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.45), rgba(143, 163, 184, 0.12));
}

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

.page-faq .faq-step:last-child::before {
  display: none;
}

.page-faq .faq-step__no {
  position: absolute;
  left: 0;
  top: 0;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--cyan);
  color: var(--ink);
  font-size: 11px;
  letter-spacing: 0;
}

.page-faq .faq-step__body h3 {
  margin: 4px 0 8px;
  font-size: 1.06rem;
  font-weight: 600;
}

.page-faq .faq-step__body p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .faq-trouble__fig {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
}

/* ---------- 编号与检索 ---------- */
.page-faq .faq-anatomy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 16px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  background: rgba(34, 211, 238, 0.05);
}

.page-faq .faq-anatomy__part {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .faq-anatomy__part b {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-faq .faq-anatomy__part span {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--gray);
}

.page-faq .faq-anatomy__sep {
  color: var(--gray);
}

.page-faq .faq-lookup {
  margin-top: clamp(26px, 4vw, 42px);
}

.page-faq .faq-lookup .tabs__btn {
  border: 1px solid var(--faq-line-soft);
  color: var(--gray);
}

.page-faq .faq-lookup .tabs__btn[aria-selected="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.page-faq .faq-lookup__panel {
  margin-top: 20px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-md);
  background: var(--ink-2);
}

.page-faq .faq-lookup__range {
  margin: 0 0 10px;
  font-size: 0.85rem;
  color: var(--orange-soft);
  letter-spacing: 0.02em;
}

.page-faq .faq-lookup__desc {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .faq-lookup__terms {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

.page-faq .faq-lookup__tip {
  margin: 20px 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--gray);
  max-width: 66ch;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support__panel {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  padding: var(--faq-pad);
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--r-lg);
  background:
    linear-gradient(140deg, rgba(249, 115, 22, 0.16), rgba(34, 211, 238, 0.08) 55%, rgba(14, 26, 43, 0) 100%),
    var(--ink-2);
}

.page-faq .faq-support__copy h2 {
  margin: 10px 0 14px;
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-faq .faq-support__copy p {
  margin: 0 0 14px;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--gray);
  max-width: 46ch;
}

.page-faq .faq-support__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.35);
}

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

.page-faq .faq-support__copy .btn {
  margin-top: 8px;
}

.page-faq .faq-support__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-support__list li {
  display: grid;
  gap: 5px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--faq-line-soft);
}

.page-faq .faq-support__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-support__key {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--gray);
}

.page-faq .faq-support__val {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--cream);
  overflow-wrap: anywhere;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-index {
    gap: 12px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-trouble__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  }

  .page-faq .faq-support__panel {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-cat:nth-child(3n + 2) {
    margin-top: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .tabs__btn,
  .page-faq .accordion__arrow {
    transition: none;
  }

  .page-faq .faq-cat:hover,
  .page-faq .faq-cat:focus-within {
    transform: none;
  }
}