.page-faq {
  --faq-tree-w: 258px;
  --faq-sticky-top: 96px;
  display: block;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  padding-bottom: 48px;
  overflow-x: hidden;
}

.page-faq .breadcrumbs {
  padding-top: 18px;
}

.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  color: var(--slate);
}

.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

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

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: var(--gap-lg);
  padding-top: 20px;
  padding-bottom: 32px;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .faq-hero .index-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--blue);
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -.5px;
  margin: 0 0 16px;
  color: var(--ink);
}

.page-faq .faq-hero .lede {
  font-size: 16px;
  line-height: 1.75;
  color: var(--slate);
  margin: 0 0 22px;
  max-width: 46em;
}

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

.page-faq .faq-hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-faq .faq-hero-stats li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  color: var(--slate);
  line-height: 1.5;
}

.page-faq .stat-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--indigo);
  line-height: 1;
  flex: none;
}

.page-faq .stat-label {
  min-width: 0;
}

.page-faq .faq-hero-figure {
  margin: 0;
}

.page-faq .faq-hero-figure .media-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-hero-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  color: var(--slate);
  font-family: var(--font-mono);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--gap-lg);
  align-items: start;
}

/* ---------- 目录树 ---------- */
.page-faq .faq-tree {
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
}

.page-faq .faq-tree-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 12px;
}

.page-faq .tree,
.page-faq .tree-sub {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .tree > li {
  padding: 2px 0;
}

.page-faq .tree a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 10px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .tree a:hover,
.page-faq .tree a:focus-visible {
  background: var(--paper);
  border-left-color: var(--blue);
  color: var(--blue);
  outline: none;
}

.page-faq .tree a:focus-visible {
  box-shadow: 0 0 0 2px var(--blue);
}

.page-faq .tree-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--blue);
  flex: none;
}

.page-faq .tree-sub {
  margin: 2px 0 6px 20px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.page-faq .tree-sub a {
  font-size: 13px;
  color: var(--slate);
  padding: 5px 8px;
}

.page-faq .faq-tree-foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  color: var(--slate);
  line-height: 1.6;
}

.page-faq .faq-tree-foot a {
  color: var(--blue);
  text-decoration: none;
  font-weight: 600;
}

.page-faq .faq-tree-foot a:hover {
  text-decoration: underline;
}

/* ---------- 正文区 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-section {
  padding-bottom: 34px;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-head {
  margin-bottom: 18px;
}

.page-faq .faq-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 8px;
}

.page-faq .faq-head h2 {
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.25;
  letter-spacing: -.4px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--ink);
}

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

/* ---------- 主题卡 ---------- */
.page-faq .topic-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
}

.page-faq .topic-card {
  position: relative;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 20px;
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .topic-card:hover {
  transform: translateY(-2px);
  border-color: var(--blue);
}

.page-faq .topic-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-faq .topic-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .topic-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
  margin: 0 0 10px !important;
}

.page-faq .topic-card a {
  color: var(--blue);
  font-weight: 600;
  text-decoration: none;
}

.page-faq .topic-card a:hover {
  text-decoration: underline;
}

.page-faq .topic-card--accent {
  background: var(--indigo);
  border-color: var(--indigo);
  color: #fff;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%);
  border-radius: 0 0 var(--radius) var(--radius);
  padding-top: 22px;
}

.page-faq .topic-card--accent h3 {
  color: #fff;
}

.page-faq .topic-card--accent p {
  color: rgba(255, 255, 255, .82);
}

.page-faq .topic-card--accent .topic-num {
  color: var(--amber);
}

.page-faq .topic-card--accent a {
  color: var(--amber);
}

/* ---------- 步骤 ---------- */
.page-faq .steps {
  list-style: none;
  counter-reset: step;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .steps li {
  counter-increment: step;
  position: relative;
  padding-left: 42px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .steps li strong {
  color: var(--ink);
}

.page-faq .steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--orange);
  border: 1px solid var(--orange);
  border-radius: var(--radius-pill);
}

.page-faq .steps--compact {
  gap: 10px;
  margin: 12px 0 0;
}

.page-faq .steps--compact li {
  font-size: 14px;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--blue);
}

.page-faq .faq-item[open] {
  border-color: var(--blue);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-item > summary {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  border-left: 3px solid transparent;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item[open] > summary {
  border-left-color: var(--orange);
  background: var(--mist);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.page-faq .item-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--blue);
  flex: none;
  padding-top: 2px;
}

.page-faq .item-body {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--line);
}

.page-faq .item-line {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .item-line--muted {
  color: var(--slate);
  font-size: 13px;
}

.page-faq .item-line a {
  color: var(--blue);
  font-weight: 600;
  text-decoration: none;
}

.page-faq .item-line a:hover {
  text-decoration: underline;
}

.page-faq .item-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--teal);
  background: rgba(14, 75, 69, .1);
  border-radius: var(--radius-pill);
  padding: 2px 8px;
  margin-right: 8px;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
}

.page-faq .faq-figure .media-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--mist);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--slate);
}

.page-faq .faq-aside {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--amber);
  background: var(--mist);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .faq-aside a {
  color: var(--blue);
  font-weight: 600;
  text-decoration: none;
}

.page-faq .faq-aside a:hover {
  text-decoration: underline;
}

/* ---------- 检索 tabs ---------- */
.page-faq .faq-tabs {
  margin-top: 4px;
}

.page-faq .faq-tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  margin-bottom: 16px;
}

.page-faq .faq-tabs .tab-panel h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-faq .faq-tabs .tab-panel p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-tabs .tab-panel p a {
  color: var(--blue);
  font-weight: 600;
  text-decoration: none;
}

.page-faq .faq-tabs .tab-panel p a:hover {
  text-decoration: underline;
}

/* ---------- 版本面板 ---------- */
.page-faq .version-panel {
  background: var(--teal);
  color: #fff;
  border-radius: var(--radius);
  padding: 20px;
  display: grid;
  gap: 16px;
}

.page-faq .version-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .version-list li {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .86);
  padding-left: 14px;
  border-left: 2px solid rgba(255, 255, 255, .22);
}

.page-faq .ver-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--amber);
  margin-bottom: 3px;
}

.page-faq .version-link {
  justify-self: start;
  border-color: rgba(255, 255, 255, .5);
  color: #fff;
  background: transparent;
}

.page-faq .version-link:hover {
  background: var(--paper);
  color: var(--teal);
  border-color: var(--paper);
}

/* ---------- 帮助区 ---------- */
.page-faq .help-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
}

.page-faq .help-card {
  background: var(--indigo);
  color: #fff;
  border-radius: var(--radius);
  padding: 20px;
}

.page-faq .help-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 8px;
}

.page-faq .help-card p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .84);
}

.page-faq .help-card--plain {
  background: var(--mist);
  color: var(--ink);
  border: 1px solid var(--line);
}

.page-faq .help-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .help-list li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--slate);
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

.page-faq .help-list .ver-key {
  color: var(--blue);
}

.page-faq .help-list a {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  word-break: break-all;
}

.page-faq .help-list a:hover {
  color: var(--blue);
  text-decoration: underline;
}

.page-faq .help-card .btn-primary {
  display: inline-block;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-hero-stats li {
    display: block;
  }

  .page-faq .stat-num {
    display: block;
    margin-bottom: 6px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: center;
    gap: 44px;
    padding-top: 34px;
    padding-bottom: 44px;
  }

  .page-faq .topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gap-lg);
  }

  .page-faq .topic-card--accent {
    grid-column: span 2;
  }

  .page-faq .faq-figure .media-frame--tall {
    max-height: 340px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-tree-w) minmax(0, 1fr);
    gap: 48px;
  }

  .page-faq .faq-tree {
    position: sticky;
    top: var(--faq-sticky-top);
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    margin-bottom: 0;
  }

  .page-faq .faq-section {
    padding-bottom: 44px;
    margin-bottom: 44px;
  }

  .page-faq .version-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    padding: 26px 28px;
  }

  .page-faq .version-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic-card,
  .page-faq .tree a,
  .page-faq .faq-item {
    transition: none;
  }

  .page-faq .topic-card:hover {
    transform: none;
  }
}
<<<END>>>