.page-faq {
  --faq-card: #FFFFFF;
  --faq-divider: rgba(11, 42, 56, .14);
  --faq-shadow: 0 1px 0 rgba(11, 42, 56, .06);
}

/* ---------- 封面 ---------- */
.page-faq .faq-cover {
  padding: 34px 0 40px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-cover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--cyan) 42%, transparent 100%);
  opacity: .85;
}

.page-faq .faq-breadcrumb {
  margin-bottom: 26px;
}

.page-faq .faq-breadcrumb .breadcrumb__link {
  color: var(--gray-2);
  text-decoration: none;
}

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

.page-faq .faq-breadcrumb .breadcrumb__current {
  color: var(--gold);
}

.page-faq .faq-cover__grid {
  display: grid;
  gap: 26px;
  margin-bottom: 32px;
}

.page-faq .faq-cover__copy .eyebrow {
  color: var(--cyan);
  letter-spacing: .16em;
  margin-bottom: 14px;
}

.page-faq .faq-cover__copy h1 {
  color: var(--white);
  font-size: clamp(1.65rem, 5.2vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  margin: 0 0 16px;
}

.page-faq .faq-cover__copy .lede {
  color: var(--gray-2);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 46em;
  margin: 0 0 24px;
}

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

.page-faq .faq-cover__figure {
  border: 1px solid var(--line-cyan);
  background: rgba(248, 250, 251, .04);
  margin: 0;
}

.page-faq .faq-cover__figure .media-frame__caption {
  color: var(--gray-2);
  padding: 10px 14px;
  border-top: 1px solid var(--line-cool);
  font-size: .78rem;
  letter-spacing: .04em;
}

/* ---------- 分类标签索引 ---------- */
.page-faq .faq-tags {
  padding: 18px 18px 20px;
  border: 1px solid var(--line-cyan);
  background: rgba(248, 250, 251, .07);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: var(--radius);
}

.page-faq .faq-tags__label {
  color: var(--gold);
  font-size: .72rem;
  letter-spacing: .18em;
  margin: 0 0 14px;
}

.page-faq .faq-tags__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line-cool);
  color: var(--white);
  font-size: .875rem;
  text-decoration: none;
  transition: border-color .16s ease, color .16s ease, background-color .16s ease;
}

.page-faq .faq-tag .mono {
  color: var(--gold);
  font-size: .72rem;
}

.page-faq .faq-tag:hover,
.page-faq .faq-tag:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(37, 240, 224, .07);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  padding: 48px 0 52px;
}

.page-faq .faq-section .section-head {
  margin-bottom: 26px;
}

.page-faq .faq-section .section-head__num {
  color: var(--gold);
  font-size: .8rem;
  letter-spacing: .16em;
}

.page-faq .faq-section .section-head__title {
  margin: 6px 0 8px;
  color: var(--ink-800);
  font-size: clamp(1.3rem, 3.6vw, 1.8rem);
  line-height: 1.2;
}

.page-faq .faq-section .section-head__note {
  margin: 0;
  color: var(--ink-700);
  font-size: .95rem;
  line-height: 1.7;
}

.page-faq .rule {
  border: 0;
  border-top: 1px solid var(--faq-divider);
  margin: 16px 0;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-divider);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-divider);
  background: transparent;
  transition: background-color .16s ease;
}

.page-faq .faq-item[open] {
  background: rgba(11, 42, 56, .035);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 40px 16px 4px;
  position: relative;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink-800);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--gold);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  content: "\2013";
  color: var(--cyan);
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--ink-900);
  outline: none;
}

.page-faq .faq-item__q:focus-visible {
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--gray);
}

.page-faq .faq-item__a {
  padding: 0 40px 20px 4px;
  color: var(--ink-700);
  font-size: .95rem;
  line-height: 1.8;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__a a {
  color: var(--ink-800);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--gold);
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding-left: 12px;
  border-left: 2px solid var(--line-cyan);
}

.page-faq .faq-steps__num {
  color: var(--gold);
  font-size: .78rem;
  letter-spacing: .1em;
  padding-top: 3px;
}

/* ---------- 设备管理：图文并排 ---------- */
.page-faq .faq-device {
  display: grid;
  gap: 24px;
}

.page-faq .faq-device__figure {
  margin: 0;
  border: 1px solid var(--faq-divider);
  background: var(--faq-card);
}

.page-faq .faq-device__figure .media-frame__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-divider);
  color: var(--gray);
  font-size: .78rem;
  letter-spacing: .04em;
}

/* ---------- 资料下载：双栏 + 粘性索引 ---------- */
.page-faq .faq-download {
  display: grid;
  gap: 30px;
}

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

.page-faq .faq-sidecard {
  position: sticky;
  top: calc(var(--frame-top) + 20px);
  padding: 20px 18px 22px;
  background: var(--faq-card);
  border: 1px solid var(--faq-divider);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-sidecard__title {
  margin: 0 0 14px;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--gray);
}

.page-faq .faq-sidecard__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-sidecard__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 6px;
  color: var(--ink-800);
  font-size: .9rem;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color .16s ease, color .16s ease, background-color .16s ease;
}

.page-faq .faq-sidecard__link .mono {
  color: var(--gray);
  font-size: .72rem;
}

.page-faq .faq-sidecard__link:hover,
.page-faq .faq-sidecard__link:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(37, 240, 224, .08);
  color: var(--ink-900);
}

.page-faq .faq-sidecard__note {
  margin: 0 0 10px;
  font-size: .76rem;
  letter-spacing: .12em;
  color: var(--gray);
  font-family: var(--font-mono);
}

.page-faq .faq-sidecard__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-sidecard__links a {
  color: var(--ink-700);
  font-size: .88rem;
  line-height: 1.6;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

/* ---------- 联系信息条 ---------- */
.page-faq .faq-contact {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border: 1px solid var(--faq-divider);
  background: var(--faq-card);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--faq-divider);
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-contact__key {
  flex: 0 0 5.5em;
  color: var(--gray);
  font-size: .78rem;
  letter-spacing: .08em;
}

.page-faq .faq-contact__val {
  flex: 1 1 12em;
  min-width: 0;
  word-break: break-all;
  color: var(--ink-800);
  font-size: .88rem;
}

.page-faq .faq-contact .copy-btn {
  flex: 0 0 auto;
  color: var(--ink-800);
  border-color: var(--gray-2);
}

.page-faq .faq-contact .copy-btn:hover,
.page-faq .faq-contact .copy-btn:focus-visible {
  border-color: var(--cyan);
  color: var(--ink-900);
}

/* ---------- 尾注条 ---------- */
.page-faq .faq-tail {
  padding: 40px 0 44px;
}

.page-faq .faq-tail__inner {
  display: grid;
  gap: 22px;
}

.page-faq .faq-tail__copy .eyebrow {
  color: var(--cyan);
  letter-spacing: .16em;
  margin-bottom: 10px;
}

.page-faq .faq-tail__title {
  margin: 0 0 12px;
  color: var(--white);
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  line-height: 1.3;
}

.page-faq .faq-tail__text {
  margin: 0;
  color: var(--gray-2);
  font-size: .95rem;
  line-height: 1.75;
  max-width: 52em;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-cover {
    padding: 48px 0 56px;
  }

  .page-faq .faq-cover__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 42px;
    align-items: center;
    margin-bottom: 40px;
  }

  .page-faq .faq-tags {
    padding: 22px 24px 24px;
  }

  .page-faq .faq-section {
    padding: 62px 0 66px;
  }

  .page-faq .faq-item__q {
    padding: 18px 44px 18px 6px;
    font-size: 1.05rem;
  }

  .page-faq .faq-item__a {
    padding: 0 44px 22px 6px;
  }

  .page-faq .faq-device {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 36px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-download {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 52px;
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-cover__grid {
    gap: 60px;
  }

  .page-faq .faq-section {
    padding: 74px 0 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tag,
  .page-faq .faq-sidecard__link,
  .page-faq .faq-item {
    transition: none;
  }
}