.page-faq {
  --faq-ink-soft: rgba(23, 28, 38, 0.72);
  --faq-step-rule: rgba(23, 28, 38, 0.16);
  --faq-index-w: 236px;
  background: var(--indigo-950);
  color: var(--cool-white);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq .faq-crumb {
  padding-top: 14px;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .breadcrumb__link {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 5vw, 50px) 0 clamp(28px, 5vw, 60px);
  background: linear-gradient(180deg, var(--indigo-950) 0%, var(--indigo-800) 100%);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-faq .faq-h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 64px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--cool-white);
  max-width: 16em;
}

.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-facts {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
  align-self: start;
}

.page-faq .faq-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(7, 19, 38, 0.82);
}

.page-faq .faq-facts__n {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-facts__l {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* 主体两栏 */
.page-faq .faq-body {
  display: grid;
  gap: 20px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(20px, 4vw, 44px) var(--edge) clamp(48px, 7vw, 88px);
}

.page-faq .faq-index {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-index__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  min-width: 0;
  overflow-x: auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  white-space: nowrap;
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  color: var(--cool-white);
  border: 1px solid var(--line-strong);
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--indigo-950);
}

.page-faq .faq-index__link:hover .faq-index__n,
.page-faq .faq-index__link:focus-visible .faq-index__n {
  color: var(--indigo-950);
}

.page-faq .faq-index__n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--celadon);
}

.page-faq .faq-index__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* 问答画布 */
.page-faq .faq-canvas {
  display: grid;
  gap: 20px;
  min-width: 0;
}

.page-faq .faq-block {
  padding: clamp(20px, 3.4vw, 36px);
  border: 2px solid transparent;
  min-width: 0;
  scroll-margin-top: 24px;
}

.page-faq .faq-block--paper {
  background: var(--paper);
  color: var(--charcoal);
  border-color: var(--charcoal);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-block--cool {
  background: var(--cool-white);
  color: var(--indigo-950);
  border-color: var(--indigo-800);
}

.page-faq .faq-block--warm {
  background: var(--warm-gray);
  color: var(--charcoal);
  border-color: var(--charcoal);
}

.page-faq .faq-block--dark {
  background: var(--indigo-800);
  color: var(--cool-white);
  border-color: var(--line-strong);
  --faq-step-rule: var(--line);
  --faq-ink-soft: var(--muted);
}

.page-faq .faq-block:target,
.page-faq .faq-device:target {
  outline: 4px solid var(--amber);
  outline-offset: 3px;
}

.page-faq .faq-block__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--celadon-deep);
}

.page-faq .faq-block--dark .faq-block__kicker {
  color: var(--amber);
}

.page-faq .faq-h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 32px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-faq .faq-sub {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-back {
  margin: 18px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-block a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 0.16s ease;
}

.page-faq .faq-block a:hover,
.page-faq .faq-block a:focus-visible {
  color: var(--celadon-deep);
}

.page-faq .faq-block--dark a:hover,
.page-faq .faq-block--dark a:focus-visible {
  color: var(--amber);
}

/* 步骤 */
.page-faq .faq-steps {
  list-style: none;
  display: grid;
  gap: 0;
  margin: 18px 0 0;
  padding: 0;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--faq-step-rule);
}

.page-faq .faq-steps--compact li {
  padding: 10px 0;
  grid-template-columns: 30px minmax(0, 1fr);
}

.page-faq .faq-steps__n {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--celadon-deep);
}

.page-faq .faq-block--dark .faq-steps__n {
  color: var(--celadon);
}

.page-faq .faq-steps__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .faq-steps--compact .faq-steps__body p {
  font-size: 13.8px;
}

.page-faq .faq-dev {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  line-height: 1.5;
  color: var(--celadon-deep);
  border: 1px solid var(--celadon-deep);
}

.page-faq .faq-block--dark .faq-dev {
  color: var(--celadon);
  border-color: var(--celadon);
}

/* 图 */
.page-faq .faq-figure {
  margin: 20px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--charcoal);
  background: var(--cool-white);
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

/* 双栏对照 */
.page-faq .faq-split {
  display: grid;
  margin: 20px 0 0;
  border: 2px solid var(--indigo-800);
}

.page-faq .faq-split__col {
  padding: 16px 18px;
}

.page-faq .faq-split__col--dark {
  background: var(--indigo-800);
  color: var(--cool-white);
}

.page-faq .faq-split__col--light {
  background: var(--cool-white);
  color: var(--indigo-950);
}

.page-faq .faq-split__col h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-faq .faq-split__col p {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.75;
}

/* 设备筛选与分组 */
.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
}

.page-faq .faq-chip {
  padding: 7px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--charcoal);
  background: transparent;
  border: 2px solid var(--charcoal);
  transition: background 0.16s ease, color 0.16s ease;
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  background: var(--charcoal);
  color: var(--warm-gray);
}

.page-faq .faq-devices {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-faq .faq-device {
  padding: 16px;
  border: 2px solid var(--charcoal);
  background: rgba(251, 247, 238, 0.55);
  scroll-margin-top: 24px;
}

.page-faq .faq-device h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-faq .faq-device .faq-steps {
  margin-top: 10px;
}

/* 反馈分类 */
.page-faq .faq-feedback {
  display: grid;
  gap: 1px;
  margin: 18px 0 0;
  padding: 1px;
  background: var(--charcoal);
  border: 2px solid var(--charcoal);
}

.page-faq .faq-feedback__item {
  padding: 14px 16px;
  background: var(--paper);
}

.page-faq .faq-feedback__k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--celadon-deep);
}

.page-faq .faq-feedback__item p {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.7;
  color: var(--faq-ink-soft);
}

/* 标题模板 */
.page-faq .faq-template {
  margin: 18px 0 0;
  padding: 16px;
  background: var(--cool-white);
  border: 2px dashed var(--charcoal);
}

.page-faq .faq-template__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--celadon-deep);
}

.page-faq .faq-template__body {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.6vw, 15px);
  line-height: 1.6;
  color: var(--indigo-950);
  word-break: break-word;
}

.page-faq .faq-template__eg {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--faq-ink-soft);
  word-break: break-word;
}

/* 追问折叠 */
.page-faq .faq-qa {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--faq-step-rule);
}

.page-faq .faq-qa summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.6;
}

.page-faq .faq-qa summary::marker {
  color: var(--celadon-deep);
}

.page-faq .faq-qa summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-faq .faq-qa p {
  margin: 10px 0 0;
  font-size: 13.8px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

/* 联络引导 */
.page-faq .faq-ask {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
}

.page-faq .faq-ask li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--cool-white);
}

.page-faq .faq-ask__n {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  color: var(--amber);
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-faq .faq-devices {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1fr) 268px;
    align-items: start;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index__link {
    border: 0;
    border-left: 2px solid var(--line);
    padding: 9px 0 9px 12px;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: rgba(242, 179, 61, 0.1);
    border-left-color: var(--amber);
    color: var(--cool-white);
  }

  .page-faq .faq-index__link:hover .faq-index__n,
  .page-faq .faq-index__link:focus-visible .faq-index__n {
    color: var(--amber);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-chip,
  .page-faq .faq-block a,
  .page-faq .breadcrumb__link {
    transition: none;
  }
}
<<<END>>>