.page-faq {
  --faq-line: rgba(140, 147, 159, 0.22);
  --faq-line-strong: rgba(140, 147, 159, 0.42);
  background: var(--carbon-black);
  color: var(--cool-gray-200);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-faq .section {
  padding-block: clamp(36px, 5.5vw, 68px);
}

.page-faq .breadcrumbs {
  padding-top: clamp(16px, 2.4vw, 26px);
  font-size: 13px;
  color: var(--cool-gray-400);
}

.page-faq .breadcrumbs a {
  color: var(--cool-gray-200);
  text-decoration: none;
}

.page-faq .breadcrumbs a:hover {
  color: var(--signal-orange);
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  color: var(--paper-white);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0;
}

.page-faq h1 {
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.14;
  margin-top: 16px;
}

.page-faq h2 {
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.2;
}

.page-faq h3 {
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.3;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  border-top: 2px solid var(--signal-orange);
  padding-top: clamp(24px, 3.4vw, 40px);
}

.page-faq .faq-hero__grid {
  gap: clamp(24px, 3.6vw, 48px);
  align-items: start;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--cool-gray-200);
  max-width: 34em;
}

.page-faq .faq-hero__meta {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--signal-orange);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .figure__frame {
  position: relative;
  padding: 10px;
  background: var(--pitch-900);
  border: 1px solid var(--faq-line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-faq .figure__frame::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  height: 2px;
  background: var(--orange-line);
}

.page-faq .figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  background: var(--pitch-800);
}

.page-faq .figure__img--wide {
  aspect-ratio: 2 / 1;
}

.page-faq .figure__img--tall {
  aspect-ratio: 4 / 3;
}

.page-faq .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--cool-gray-400);
}

/* ---------- 通用章节头 ---------- */
.page-faq .faq-head {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-sub {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--cool-gray-400);
  max-width: 46em;
}

.page-faq .faq-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--cool-gray-400);
}

.page-faq .faq-note a,
.page-faq .faq-item__a a,
.page-faq .device-card a,
.page-faq .faq-help__fine a {
  color: var(--signal-orange);
  text-decoration: none;
  border-bottom: 1px solid var(--orange-line);
}

.page-faq .faq-note a:hover,
.page-faq .faq-item__a a:hover,
.page-faq .device-card a:hover,
.page-faq .faq-help__fine a:hover {
  color: var(--ember-deep);
  border-bottom-color: var(--ember-deep);
}

/* ---------- 问答两栏 ---------- */
.page-faq .faq-layout {
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-faq .faq-toc {
  background: var(--pitch-900);
  border: 1px solid var(--faq-line);
  border-top: 2px solid var(--signal-orange);
  padding: 16px 14px;
}

.page-faq .faq-toc .toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cool-gray-400);
}

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

.page-faq .faq-toc .toc__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 8px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--cool-gray-200);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-toc .toc__link:hover,
.page-faq .faq-toc .toc__link:focus-visible {
  color: var(--paper-white);
  background: var(--pitch-800);
  border-left-color: var(--ember-deep);
}

.page-faq .faq-toc .toc__link:focus-visible {
  outline: 2px solid var(--signal-orange);
  outline-offset: 2px;
}

.page-faq .faq-toc .toc__link[aria-current="true"] {
  color: var(--signal-orange);
  background: var(--pitch-800);
  border-left-color: var(--signal-orange);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cool-gray-400);
}

.page-faq .faq-toc .toc__link[aria-current="true"] .faq-toc__num {
  color: var(--signal-orange);
}

.page-faq .faq-list {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-faq .faq-item {
  background: var(--pitch-900);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--ember-deep);
  scroll-margin-top: 96px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-left-color: var(--signal-orange);
}

.page-faq .faq-item:target {
  border-left-color: var(--signal-orange);
  background: var(--pitch-800);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 16px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 1.7vw, 18px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper-white);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  flex: none;
  width: 20px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--signal-orange);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  content: "\2212";
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--signal-orange);
  outline-offset: 2px;
}

.page-faq .faq-item:hover > .faq-item__q {
  color: var(--signal-orange);
}

.page-faq .faq-item__q > span:first-child {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cool-gray-400);
}

.page-faq .faq-item__a {
  padding: 0 18px 18px;
  border-top: 1px solid var(--faq-line);
  margin-top: 2px;
  padding-top: 14px;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--cool-gray-200);
  max-width: 58em;
}

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

.page-faq .faq-item__a strong {
  color: var(--paper-white);
}

/* ---------- 导航示意图 ---------- */
.page-faq .faq-navmap-wrap {
  border: 1px solid var(--faq-line);
  background: var(--pitch-900);
  overflow: hidden;
}

.page-faq .faq-navmap {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 节奏章节 ---------- */
.page-faq .faq-band {
  background: var(--pitch-900);
  border-block: 1px solid var(--faq-line);
}

.page-faq .faq-rhythm__grid {
  gap: clamp(22px, 3.4vw, 44px);
  align-items: start;
}

.page-faq .table-wrap {
  overflow-x: auto;
  border: 1px solid var(--faq-line-strong);
  background: var(--carbon-black);
}

.page-faq .data-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
}

.page-faq .data-table th {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  font-weight: 600;
  color: var(--cool-gray-400);
  border-bottom: 1px solid var(--faq-line-strong);
  white-space: nowrap;
}

.page-faq .data-table td {
  padding: 12px 14px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--cool-gray-200);
  border-bottom: 1px solid var(--faq-line);
  vertical-align: top;
}

.page-faq .data-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .data-table td:first-child {
  color: var(--paper-white);
  font-weight: 700;
  white-space: nowrap;
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--signal-orange);
  white-space: nowrap;
}

.page-faq .faq-rhythm__figure {
  margin: 0;
}

/* ---------- 设备区块 ---------- */
.page-faq .device-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-faq .device-card {
  background: var(--pitch-900);
  border: 1px solid var(--faq-line);
  border-top: 3px solid var(--cool-gray-400);
  padding: 18px 16px 20px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .device-card:hover {
  transform: translateY(-3px);
}

.page-faq .device-card--phone {
  border-top-color: var(--signal-orange);
}

.page-faq .device-card--tablet {
  border-top-color: var(--lake-teal);
}

.page-faq .device-card--desktop {
  border-top-color: var(--dusk-purple);
}

.page-faq .device-card__meta {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cool-gray-400);
}

.page-faq .device-card__title {
  margin-bottom: 10px;
}

.page-faq .device-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cool-gray-200);
}

.page-faq .faq-item--plain {
  margin-top: var(--gap);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 20px;
  padding: clamp(20px, 3.2vw, 34px);
  background:
    linear-gradient(104deg, rgba(255, 107, 26, 0.16), rgba(91, 75, 138, 0.18)),
    var(--pitch-900);
  border: 1px solid var(--orange-line);
  border-left: 4px solid var(--signal-orange);
}

.page-faq .faq-help p {
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--cool-gray-200);
  max-width: 46em;
}

.page-faq .faq-help__fine {
  font-size: 13.5px;
  color: var(--cool-gray-400);
}

.page-faq .faq-help__aside {
  display: flex;
  align-items: center;
}

.page-faq .faq-help .btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.page-faq .faq-help .btn--primary {
  background: var(--signal-orange);
  color: var(--carbon-black);
  border: 1px solid var(--ember-deep);
  box-shadow: 4px 4px 0 rgba(209, 74, 0, 0.45);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-help .btn--primary:hover {
  background: var(--ember-deep);
  color: var(--paper-white);
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 rgba(20, 22, 26, 0.6);
}

.page-faq .faq-help .btn--primary:focus-visible {
  outline: 2px solid var(--paper-white);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .device-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .device-card--tablet {
    transform: translateY(-12px);
  }

  .page-faq .device-card--tablet:hover {
    transform: translateY(-15px);
  }

  .page-faq .faq-help {
    grid-template-columns: 1.7fr auto;
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-toc {
    position: sticky;
    top: 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .device-card,
  .page-faq .device-card--tablet,
  .page-faq .device-card--tablet:hover,
  .page-faq .device-card:hover,
  .page-faq .faq-help .btn--primary:hover {
    transform: none;
    transition: none;
  }
}
<<<END>>>