.page-faq {
  --faq-max: 62em;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding: 22px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-faq .faq-crumb a {
  color: var(--steel);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-crumb [aria-current="page"] {
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: 18px;
  padding: 40px 0 46px;
  background:
    radial-gradient(circle at 86% 14%, rgba(232, 178, 26, 0.16), transparent 46%),
    radial-gradient(circle at 4% 96%, rgba(43, 224, 200, 0.13), transparent 52%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.55;
  -webkit-mask-image: radial-gradient(circle at 50% 42%, #000 0%, transparent 78%);
  mask-image: radial-gradient(circle at 50% 42%, #000 0%, transparent 78%);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
  align-items: end;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 20px;
  max-width: 17em;
  font-family: var(--font-head);
  font-size: clamp(32px, 7.6vw, 70px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  max-width: 40em;
  font-size: clamp(14.5px, 1.3vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

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

.page-faq .faq-hero-aside {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel-soft);
}

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

.page-faq .faq-quick-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-quick-item:first-child {
  padding-top: 2px;
}

.page-faq .faq-quick-item:last-child {
  padding-bottom: 2px;
  border-bottom: 0;
}

.page-faq .faq-quick-num {
  flex: 0 0 auto;
  min-width: 2.2em;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.01em;
  line-height: 1.1;
}

.page-faq .faq-quick-label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  padding-bottom: 64px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 34px;
  padding-top: 38px;
}

/* ---------- 目录 ---------- */
.page-faq .faq-toc {
  border-top: 1px solid var(--line-strong);
  padding-top: 14px;
}

.page-faq .faq-toc-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-faq .faq-toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-toc-list li {
  flex: 0 0 auto;
}

.page-faq .faq-toc-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-toc-link:hover,
.page-faq .faq-toc-link:focus-visible {
  color: var(--white);
  border-color: var(--line-strong);
}

.page-faq .faq-toc-num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-faq .faq-toc-link[aria-current="true"] {
  color: var(--white);
  background: rgba(200, 16, 46, 0.16);
  border-color: rgba(200, 16, 46, 0.55);
}

.page-faq .faq-toc-link[aria-current="true"] .faq-toc-num {
  color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 96px;
  padding-bottom: 56px;
}

.page-faq .faq-section + .faq-section {
  padding-top: 4px;
}

.page-faq .faq-section:target {
  animation: faq-target-flash 1.8s var(--ease);
  border-radius: var(--radius-md);
}

@keyframes faq-target-flash {
  0% {
    background: rgba(43, 224, 200, 0.1);
  }
  100% {
    background: transparent;
  }
}

.page-faq .faq-sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 14px;
  padding-top: 6px;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-sec-index {
  flex: 0 0 auto;
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: clamp(12px, 1.2vw, 14px);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-sec-title {
  margin: 0;
  padding-top: 14px;
  font-family: var(--font-head);
  font-size: clamp(22px, 4.6vw, 37px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-sec-lede {
  max-width: 48em;
  margin: 0 0 26px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-sec-lede a,
.page-faq .faq-step-body a,
.page-faq .faq-fault-cell a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 196, 83, 0.42);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-sec-lede a:hover,
.page-faq .faq-step-body a:hover,
.page-faq .faq-fault-cell a:hover,
.page-faq .faq-sec-lede a:focus-visible,
.page-faq .faq-step-body a:focus-visible,
.page-faq .faq-fault-cell a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 四层教程 ---------- */
.page-faq .faq-levels {
  display: grid;
  gap: 14px;
}

.page-faq .faq-level {
  position: relative;
  padding: 22px 20px 22px 26px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  --faq-accent: var(--steel);
}

.page-faq .faq-level::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 3px;
  border-radius: 3px;
  background: var(--faq-accent);
}

.page-faq .faq-level:nth-child(1) {
  --faq-accent: var(--red);
}

.page-faq .faq-level:nth-child(2) {
  --faq-accent: var(--gold);
}

.page-faq .faq-level:nth-child(3) {
  --faq-accent: var(--cyan);
}

.page-faq .faq-level:nth-child(4) {
  --faq-accent: var(--steel);
}

.page-faq .faq-level-title {
  margin: 12px 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

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

.page-faq .faq-level-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-light);
  text-decoration: none;
  transition: transform 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-level-link::after {
  content: " →";
}

.page-faq .faq-level-link:hover,
.page-faq .faq-level-link:focus-visible {
  color: var(--white);
  transform: translateX(3px);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 30px 0 0;
}

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

.page-faq .faq-figure .figure-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--steel);
}

/* ---------- 步骤 ---------- */
.page-faq .faq-toolsbar {
  display: flex;
  justify-content: flex-end;
  margin: 0 0 8px;
}

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

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-step-num {
  padding-top: 2px;
  font-size: clamp(19px, 5.6vw, 28px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-faq .faq-step-title {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-faq .faq-step-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 大屏 / 移动端 ---------- */
.page-faq .faq-devices {
  display: grid;
  gap: 14px;
}

.page-faq .faq-device {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(22, 50, 79, 0.7), rgba(14, 23, 38, 0.5));
}

.page-faq .faq-device--mobile {
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(43, 224, 200, 0.09), rgba(14, 23, 38, 0.55));
  border-color: rgba(43, 224, 200, 0.24);
}

.page-faq .faq-device-title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-faq .faq-device-note {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .faq-device-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 11px;
}

.page-faq .faq-device-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-device-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

.page-faq .faq-device--mobile .faq-device-list li::before {
  background: var(--cyan);
}

/* ---------- 故障速查 ---------- */
.page-faq .faq-faults {
  border-top: 1px solid var(--line-strong);
}

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

.page-faq .faq-fault-q {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-fault-q:hover,
.page-faq .faq-fault-q:focus-visible {
  color: var(--gold-light);
}

.page-faq .faq-fault-mark {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 0.28em;
}

.page-faq .faq-fault-mark::before,
.page-faq .faq-fault-mark::after {
  content: "";
  position: absolute;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-faq .faq-fault-mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-fault-mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-fault[open] .faq-fault-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-fault-body {
  padding: 0 2px 20px 27px;
}

.page-faq .faq-fault-grid {
  display: grid;
  gap: 14px;
}

.page-faq .faq-fault-key {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-fault-cell p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  padding: 34px 22px 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 92% 8%, rgba(200, 16, 46, 0.22), transparent 52%),
    var(--panel-soft);
}

.page-faq .faq-cta-title {
  margin: 12px 0 12px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-cta-text {
  max-width: 46em;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-levels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-devices {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-step {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 20px;
  }

  .page-faq .faq-fault-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 26px;
  }

  .page-faq .faq-fault-body {
    padding-left: 27px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero {
    padding: 58px 0 58px;
  }

  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.72fr) minmax(0, 0.92fr);
    gap: 52px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 54px;
    padding-top: 46px;
  }

  .page-faq .faq-toc-wrap {
    position: sticky;
    top: calc(var(--header-h, 72px) + 26px);
  }

  .page-faq .faq-toc {
    border-top: 0;
    padding-top: 0;
  }

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

  .page-faq .faq-toc-list li {
    flex: 1 1 auto;
  }

  .page-faq .faq-toc-link {
    padding: 10px 12px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0 10px 10px 0;
    white-space: normal;
    font-size: 13.5px;
    line-height: 1.5;
  }

  .page-faq .faq-toc-link[aria-current="true"] {
    background: rgba(232, 178, 26, 0.1);
    border-left-color: var(--gold);
    box-shadow: inset 0 0 0 1px rgba(232, 178, 26, 0.2);
  }

  .page-faq .faq-levels {
    gap: 18px;
  }

  .page-faq .faq-section {
    padding-bottom: 72px;
  }

  .page-faq .faq-cta {
    padding: 44px 46px 46px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-section:target {
    animation: none;
  }

  .page-faq .faq-level-link:hover,
  .page-faq .faq-level-link:focus-visible {
    transform: none;
  }
}
<<<END>>>