.page-faq {
  --toc-w: 250px;
  --faq-gap: 48px;
  padding-bottom: 96px;
}

/* ---------- 首屏区 ---------- */
.page-faq .faq-intro {
  padding-top: 28px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-intro__title {
  margin: 14px 0 0;
  max-width: 20em;
  font-size: clamp(1.7rem, 1.15rem + 2.6vw, 2.9rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-faq .faq-intro__lead {
  margin: 18px 0 0;
  max-width: 44em;
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.8;
}

.page-faq .faq-intro__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--dim);
}

.page-faq .faq-intro__meta li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-intro__meta li::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--grass);
}

/* ---------- 主体双栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-top: 36px;
}

.page-faq .faq-toc__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .toc-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.page-faq .toc-link__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--grass);
}

.page-faq .toc-link:hover {
  color: var(--fg);
  border-color: var(--line);
  border-left-color: var(--dim);
}

.page-faq:has(#guide-start.is-current) .toc-link[href="#guide-start"],
.page-faq:has(#guide-screen.is-current) .toc-link[href="#guide-screen"],
.page-faq:has(#guide-read.is-current) .toc-link[href="#guide-read"],
.page-faq:has(#guide-search.is-current) .toc-link[href="#guide-search"],
.page-faq:has(#guide-version.is-current) .toc-link[href="#guide-version"],
.page-faq:has(#guide-fix.is-current) .toc-link[href="#guide-fix"],
.page-faq:has(#guide-more.is-current) .toc-link[href="#guide-more"] {
  color: var(--fg);
  background: var(--board);
  border-color: var(--grass);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

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

.page-faq .section__index {
  font-family: var(--font-mono);
  color: var(--grass);
}

.page-faq .section__title {
  font-size: clamp(1.35rem, 1.1rem + 1.2vw, 1.95rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-faq .faq-sec a {
  color: var(--grass);
  text-decoration: none;
  border-bottom: 1px solid var(--grass-deep);
}

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

/* ---------- 三步上手 ---------- */
.page-faq .start-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-faq .step-card {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-faq .step-card:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .step-card__num {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  background: var(--board);
  color: var(--grass);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
}

.page-faq .step-card__title {
  margin: 2px 0 8px;
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .step-card__text {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.75;
}

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

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  object-fit: cover;
  background: var(--steel);
}

.page-faq .faq-shot figcaption {
  margin-top: 10px;
  color: var(--dim);
  font-size: 13.5px;
  line-height: 1.65;
}

/* ---------- 设备连接 ---------- */
.page-faq .device-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .device-card {
  padding: 22px 20px 24px;
  background: var(--board);
}

.page-faq .device-card__title {
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-faq .device-list {
  margin: 0;
}

.page-faq .device-list dt {
  margin-top: 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--grass);
}

.page-faq .device-list dd {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 字段释义 ---------- */
.page-faq .table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--board);
}

.page-faq .field-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-faq .field-table th,
.page-faq .field-table td {
  padding: 13px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.page-faq .field-table thead th {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--muted);
  background: var(--steel);
}

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

.page-faq .field-table td:first-child {
  font-family: var(--font-mono);
  color: var(--fg);
  white-space: nowrap;
}

.page-faq .field-table td:nth-child(2) {
  color: var(--muted);
  line-height: 1.7;
}

.page-faq .field-table .is-num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--signal);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-faq .read-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 30px;
}

.page-faq .read-notes p {
  margin: 0 0 14px;
  max-width: 40em;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.8;
}

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

/* ---------- 检索路径 ---------- */
.page-faq .path-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .path-item {
  padding: 24px 20px 26px;
  background: var(--bg);
  transition: background-color 180ms ease;
}

.page-faq .path-item:hover {
  background: var(--board);
}

.page-faq .path-item__title {
  margin: 0 0 10px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
}

.page-faq .path-item__text {
  margin: 0;
  max-width: 42em;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .query-block {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--grass);
  background: var(--steel);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  white-space: pre;
  overflow-x: auto;
}

.page-faq .query-block code {
  font-family: inherit;
}

.page-faq .path-foot {
  margin: 26px 0 0;
}

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

.page-faq .qa-list--tight {
  margin-top: 30px;
}

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

.page-faq .qa__q {
  position: relative;
  display: block;
  padding: 17px 40px 17px 14px;
  border-left: 2px solid transparent;
  color: var(--fg);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  cursor: pointer;
  list-style: none;
  transition: color 160ms ease, border-color 160ms ease;
}

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

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--grass);
  border-left-color: var(--grass);
}

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--grass);
  transition: transform 160ms ease;
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .qa[open] .qa__q {
  color: var(--fg);
  border-left-color: var(--grass-deep);
}

.page-faq .qa__a {
  padding: 0 40px 20px 16px;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 42em;
}

/* ---------- 纠错 ---------- */
.page-faq .fix-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .fix-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .fix-item__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-faq .fix-item__title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
}

.page-faq .fix-item__text {
  margin: 0;
  max-width: 42em;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .fix-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
  padding: 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--signal);
  background: var(--board);
}

.page-faq .fix-contact__mail {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--fg);
  word-break: break-all;
}

.page-faq .fix-contact__note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
}

/* ---------- 收尾 ---------- */
.page-faq .more-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .more-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 24px 20px 26px;
  background: var(--board);
}

.page-faq .more-card__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
}

.page-faq .more-card__text {
  margin: 0;
  flex: 1 1 auto;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 768px) {
  .page-faq .device-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .path-item {
    padding: 26px 28px 28px;
  }

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

@media (min-width: 1024px) {
  .page-faq {
    padding-bottom: 120px;
  }

  .page-faq .faq-intro {
    padding-top: 36px;
    padding-bottom: 52px;
  }

  .page-faq .faq-shell {
    grid-template-columns: var(--toc-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    padding-top: 44px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 32px;
    align-self: start;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .page-faq .toc-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .toc-item {
    flex: none;
  }

  .page-faq .toc-link {
    margin-left: -1px;
    padding: 10px 14px;
    border: 0;
    border-left: 2px solid transparent;
    white-space: normal;
    font-size: 14px;
  }

  .page-faq .toc-link:hover {
    border-left-color: var(--dim);
  }

  .page-faq:has(#guide-start.is-current) .toc-link[href="#guide-start"],
  .page-faq:has(#guide-screen.is-current) .toc-link[href="#guide-screen"],
  .page-faq:has(#guide-read.is-current) .toc-link[href="#guide-read"],
  .page-faq:has(#guide-search.is-current) .toc-link[href="#guide-search"],
  .page-faq:has(#guide-version.is-current) .toc-link[href="#guide-version"],
  .page-faq:has(#guide-fix.is-current) .toc-link[href="#guide-fix"],
  .page-faq:has(#guide-more.is-current) .toc-link[href="#guide-more"] {
    border-color: transparent;
    border-left-color: var(--grass);
    background: var(--board);
  }

  .page-faq .faq-sec {
    padding: 56px 0;
  }

  .page-faq .start-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .read-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-shot--small {
    margin-top: 4px;
  }

  .page-faq .path-item {
    padding: 28px 32px 30px;
  }
}
<<<END>>>