.page-faq {
  --faq-idx-w: 236px;
  --faq-narrow: 40em;
}

/* ---------- 面包屑与首屏 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-hero {
  padding: clamp(40px, 7vw, 104px) 0 clamp(36px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(158, 232, 79, 0.07), transparent 58%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 78%);
}

.page-faq .faq-hero__title {
  margin: 18px 0 0;
  color: var(--title);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__lede {
  margin-top: 26px;
  max-width: 36em;
  color: var(--text);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(201, 214, 206, 0.02);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--text);
  text-decoration: none;
  transition: border-color 160ms var(--ease), color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-jump a:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
  background: rgba(158, 232, 79, 0.07);
}

/* ---------- 页面总布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-top: clamp(36px, 5vw, 68px);
  padding-bottom: clamp(64px, 9vw, 128px);
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }
}

/* ---------- 左侧常驻索引 ---------- */
.page-faq .faq-index {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-faq .faq-index__head {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-index__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-index__list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 160ms var(--ease), color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-index__link:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--top-h) + 28px);
    max-height: calc(100vh - var(--top-h) - 56px);
    overflow-y: auto;
  }

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

  .page-faq .faq-index__list > li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index__link {
    padding: 9px 10px 9px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
    transition: border-color 160ms var(--ease), color 160ms var(--ease), background-color 160ms var(--ease);
  }

  .page-faq .faq-index__link:hover {
    border-left-color: var(--accent-dim);
    background: rgba(158, 232, 79, 0.05);
  }
}

/* ---------- 区块骨架 ---------- */
.page-faq .faq-sec {
  padding-top: clamp(40px, 5vw, 64px);
  margin-top: clamp(40px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-sec__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 22px;
}

.page-faq .faq-sec__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.page-faq .faq-sec__head h2 {
  margin: 0;
  max-width: 24em;
  color: var(--title);
  line-height: 1.25;
}

.page-faq .faq-lede {
  margin: 0 0 26px;
  max-width: var(--faq-narrow);
  color: var(--text);
  line-height: 1.95;
}

.page-faq .faq-note {
  margin: 22px 0 0;
  max-width: var(--faq-narrow);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-note a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-dim);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

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

/* ---------- 图片容器 ---------- */
.page-faq .faq-figure {
  margin: 26px 0 34px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--card);
}

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

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

/* ---------- 四类主题索引 ---------- */
.page-faq .topic-tree {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-faq .topic-node {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 20px 0 20px 22px;
  border-bottom: 1px solid var(--line);
}

.page-faq .topic-node:last-child {
  border-bottom: 0;
}

.page-faq .topic-node::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 30px;
  width: 7px;
  height: 7px;
  box-sizing: border-box;
  border-radius: 50%;
  border: 1px solid var(--accent-dim);
  background: var(--ink);
}

.page-faq .topic-node__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .topic-node__text {
  flex: 1 1 260px;
  min-width: 0;
}

.page-faq .topic-node__title {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--title);
}

.page-faq .topic-node__desc {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .topic-node__count {
  flex: 0 0 auto;
  margin-left: auto;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
  white-space: nowrap;
}

/* ---------- 五步向导 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}

.page-faq .step {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 18px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .step::after {
  content: "";
  position: absolute;
  left: 19px;
  top: 40px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-faq .step:last-child::after {
  display: none;
}

.page-faq .step__num {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.page-faq .step__body {
  min-width: 0;
  max-width: var(--faq-narrow);
}

.page-faq .step__body h3 {
  margin: 6px 0 10px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--title);
}

.page-faq .step__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text);
}

.page-faq .field-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 14px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--ink-2);
}

.page-faq .field-row {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
}

.page-faq .field-name {
  color: var(--muted);
  border-bottom: 1px dashed var(--line);
}

.page-faq .field-val {
  padding: 2px 7px;
  border-radius: 3px;
  color: var(--accent);
  background: rgba(158, 232, 79, 0.09);
}

.page-faq .step__meta {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  border-left: 2px solid var(--line);
  padding-left: 12px;
}

/* ---------- 文档导出 ---------- */
.page-faq .export-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-faq .export-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 44px;
    align-items: start;
  }
}

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

.page-faq .export-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 22px;
}

@media (min-width: 720px) {
  .page-faq .export-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .export-card {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  box-shadow: inset 0 1px 0 rgba(201, 214, 206, 0.05);
}

.page-faq .export-card--pdf {
  border-left: 2px solid var(--accent-dim);
}

.page-faq .export-card--md {
  border-left: 2px solid var(--muted);
}

.page-faq .export-card__tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.page-faq .export-card--md .export-card__tag {
  color: var(--text);
}

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

.page-faq .export-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .export-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--ink-2);
}

.page-faq .export-strip__text {
  flex: 1 1 260px;
  margin: 0;
  min-width: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .export-strip .copy-btn {
  flex: 0 0 auto;
}

/* ---------- 旧版差异对照 ---------- */
.page-faq .diff-wrap {
  margin-top: 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--ink-2);
}

.page-faq .diff-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .diff-table caption {
  caption-side: top;
  padding: 14px 18px 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .diff-table th,
.page-faq .diff-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
}

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

.page-faq .diff-table thead th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: var(--card);
}

.page-faq .diff-table tbody th {
  font-size: 14px;
  font-weight: 600;
  color: var(--title);
}

.page-faq .diff-table tbody td {
  color: var(--text);
  font-size: 14px;
}

.page-faq .diff-table tbody td:last-child {
  background: rgba(226, 166, 75, 0.04);
}

.page-faq .diff-mark {
  color: var(--amber);
  border-bottom: 1px dotted var(--amber);
  padding-bottom: 1px;
}

/* ---------- 订阅与计费问答 ---------- */
.page-faq .qa-list {
  margin-top: 6px;
}

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

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

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--title);
  transition: color 160ms var(--ease);
}

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

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--accent-dim);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
  color: var(--accent);
}

.page-faq .qa__q:hover {
  color: var(--accent);
}

.page-faq .qa__index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .qa__a {
  margin: 0 0 20px;
  padding: 2px 0 2px 30px;
  border-left: 2px solid transparent;
  max-width: var(--faq-narrow);
  transition: border-color 160ms var(--ease);
}

.page-faq .qa[open] .qa__a {
  border-left-color: var(--accent);
  margin-bottom: 26px;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.95;
  color: var(--text);
}

.page-faq .qa__path {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
  word-break: break-word;
}

/* ---------- 联系支持 ---------- */
.page-faq .help-prep {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  max-width: var(--faq-narrow);
}

.page-faq .help-prep li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .help-prep li:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .help-prep__k {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.page-faq .help-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--line);
}

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

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

.page-faq .help-card__key {
  display: block;
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .help-card__val {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--title);
  word-break: break-word;
}

.page-faq .faq-cta {
  margin: 30px 0 0;
}

/* ---------- 窄屏保护与降级 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-sec__head {
    flex-direction: column;
    gap: 8px;
  }

  .page-faq .faq-sec__num {
    font-size: 24px;
  }

  .page-faq .faq-hero__title {
    font-size: clamp(30px, 9vw, 42px);
  }

  .page-faq .topic-node__count {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .faq-index__link,
  .page-faq .faq-note a,
  .page-faq .qa__q,
  .page-faq .qa__a {
    transition-duration: 120ms;
  }
}
<<<END>>>