/* ============================================================
   文档中心 /docs/ —— 页面专属样式，全部限定在 .page-faq 作用域内
   ============================================================ */

.page-faq {
  position: relative;
  isolation: isolate;
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 540px;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 100% at 16% 0%, rgba(23, 224, 176, 0.16), transparent 72%),
    radial-gradient(48% 92% at 88% 4%, rgba(123, 91, 255, 0.16), transparent 74%);
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 224, 176, 0.4);
}

.page-faq a:hover,
.page-faq a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 面包屑 ---------- */

.page-faq .crumbs {
  padding-top: clamp(84px, 12vw, 128px);
  padding-bottom: 0;
  font-size: 12.5px;
  color: var(--muted);
}

.page-faq .crumbs a {
  color: var(--muted);
  border-bottom: 0;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--cyan);
}

.page-faq .crumbs span[aria-current="page"] {
  color: var(--text);
}

/* ---------- 首屏封面 ---------- */

.page-faq .faq-hero {
  padding-top: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 40px);
  align-items: end;
}

.page-faq .faq-title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 14px 0 0;
  max-width: 22ch;
}

.page-faq .lead {
  margin: 20px 0 0;
  max-width: 66ch;
  font-size: clamp(15.5px, 1.3vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .hero-panel {
  border: 2px solid var(--line);
  background: var(--card);
  box-shadow: var(--hard);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-faq .hero-panel-title {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--violet);
  text-transform: uppercase;
}

.page-faq .hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 2px solid var(--line);
}

.page-faq .hero-stats li {
  padding: 14px 10px;
  border-right: 1px solid rgba(42, 53, 80, 0.85);
  text-align: center;
}

.page-faq .hero-stats li:last-child {
  border-right: 0;
}

.page-faq .stat-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-faq .stat-lab {
  display: block;
  margin-top: 5px;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--muted);
}

.page-faq .hero-note {
  margin: 16px 0 18px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .hero-panel .btn {
  width: 100%;
  text-align: center;
  border-bottom: 2px solid var(--line);
}

/* ---------- 文档地图 ---------- */

.page-faq .map-section {
  margin-top: clamp(42px, 6vw, 76px);
}

.page-faq .map-intro {
  max-width: 74ch;
}

.page-faq .map-intro h2 {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(23px, 3.3vw, 37px);
  line-height: 1.26;
  color: var(--text);
  margin: 12px 0 12px;
}

.page-faq .map-lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .doc-map {
  margin-top: clamp(24px, 3.4vw, 38px);
  display: grid;
  grid-template-columns: 1fr;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--hard);
}

.page-faq .map-legend {
  padding: clamp(18px, 2.4vw, 26px);
  border-bottom: 2px solid var(--line);
  background: linear-gradient(180deg, rgba(23, 224, 176, 0.07), transparent 78%);
}

.page-faq .legend-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .legend-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .legend-row {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(42, 53, 80, 0.9);
  font-size: 14px;
  color: var(--text);
}

.page-faq .legend-row:last-child {
  border-bottom: 0;
}

.page-faq .legend-swatch {
  width: 12px;
  height: 12px;
  flex: none;
  border: 2px solid var(--line);
}

.page-faq .legend-swatch--cyan {
  background: var(--cyan);
}

.page-faq .legend-swatch--amber {
  background: var(--amber);
}

.page-faq .legend-swatch--violet {
  background: var(--violet);
}

.page-faq .legend-foot {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--muted);
}

.page-faq .map-groups {
  display: grid;
}

.page-faq .map-group {
  border-bottom: 2px solid var(--line);
}

.page-faq .map-group:last-child {
  border-bottom: 0;
}

.page-faq .map-group > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: clamp(16px, 2vw, 22px) clamp(16px, 2.4vw, 28px);
  transition: background 160ms ease;
}

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

.page-faq .map-group > summary:hover,
.page-faq .map-group > summary:focus-visible {
  background: rgba(23, 224, 176, 0.06);
  outline: none;
}

.page-faq .map-group > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 19px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .map-group[open] > summary::after {
  content: "—";
  font-size: 15px;
}

.page-faq .group-square {
  width: 10px;
  height: 10px;
  flex: none;
  border: 2px solid var(--line);
}

.page-faq .group-square--cyan {
  background: var(--cyan);
}

.page-faq .group-square--amber {
  background: var(--amber);
}

.page-faq .group-square--violet {
  background: var(--violet);
}

.page-faq .group-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--text);
}

.page-faq .group-meta {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.page-faq .entry-list {
  list-style: none;
  margin: 0;
  padding: 0 clamp(16px, 2.4vw, 28px) clamp(14px, 2vw, 20px);
}

.page-faq .entry {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 10px 0;
  border-top: 1px dashed rgba(42, 53, 80, 0.75);
}

.page-faq .entry-no {
  flex: none;
  min-width: 3.6em;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--violet);
}

.page-faq .entry-title {
  flex: 1 1 210px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text);
}

/* ---------- 正文骨架 ---------- */

.page-faq .faq-body {
  margin-top: clamp(40px, 6vw, 78px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-faq .doc-section {
  padding: clamp(32px, 4.4vw, 52px) 0;
  border-top: 2px solid var(--line);
  scroll-margin-top: 104px;
}

.page-faq .faq-main > .doc-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .doc-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-bottom: 16px;
}

.page-faq .doc-head .sec-num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--violet);
  border: 2px solid var(--line);
  padding: 4px 8px;
  background: var(--card);
}

.page-faq .doc-head h2 {
  flex: 1 1 260px;
  margin: 0;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.32;
  color: var(--text);
}

.page-faq .doc-section p {
  max-width: 70ch;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-faq .doc-section strong {
  color: var(--text);
  font-weight: 700;
}

.page-faq .section-tail {
  margin-top: 20px !important;
  padding-top: 16px;
  border-top: 1px dashed rgba(42, 53, 80, 0.85);
  font-size: 14.5px !important;
}

/* ---------- 项目符号列表 ---------- */

.page-faq .dot-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .dot-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.74;
  color: var(--muted);
}

.page-faq .dot-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--cyan);
}

/* ---------- 步骤序列 ---------- */

.page-faq .steps {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border: 2px solid var(--line);
  background: var(--card);
}

.page-faq .step {
  display: grid;
  grid-template-columns: 3.4em 1fr;
  border-bottom: 1px solid rgba(42, 53, 80, 0.85);
}

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

.page-faq .step-no {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.06em;
  padding: 18px 8px;
  text-align: center;
  border-right: 1px solid rgba(42, 53, 80, 0.85);
}

.page-faq .step-body {
  padding: 16px 18px 18px;
}

.page-faq .step-body h3 {
  margin: 0 0 7px;
  font-family: var(--sans);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .step-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--muted);
}

.page-faq .step-path {
  display: inline-block;
  margin-top: 10px;
  padding: 5px 10px;
  border: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--cyan);
  word-break: break-all;
}

/* ---------- 提示条 ---------- */

.page-faq .callout {
  margin: 22px 0 0;
  padding: 15px 18px;
  border: 2px solid var(--line);
  border-left-width: 6px;
  background: var(--card);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 74ch;
}

.page-faq .callout--amber {
  border-left-color: var(--amber);
}

.page-faq .callout--danger {
  border-left-color: var(--danger);
}

/* ---------- 版本列表 ---------- */

.page-faq .version-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border: 2px solid var(--line);
}

.page-faq .version-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 15px 18px;
  background: var(--card);
  border-bottom: 1px solid rgba(42, 53, 80, 0.85);
}

.page-faq .version-row:last-child {
  border-bottom: 0;
}

.page-faq .ver-tag {
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.03em;
  min-width: 5.6em;
}

.page-faq .ver-desc {
  flex: 1 1 220px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 私钥双栏 ---------- */

.page-faq .key-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-faq .key-card {
  border: 2px solid var(--line);
  background: var(--card);
  padding: 18px 20px 20px;
  box-shadow: var(--hard);
}

.page-faq .key-card--warn {
  border-left-width: 6px;
  border-left-color: var(--amber);
}

.page-faq .key-label {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .key-card--warn .key-label {
  color: var(--amber);
}

.page-faq .key-card .dot-list {
  margin-top: 0;
}

.page-faq .key-card .dot-list li {
  font-size: 14.5px;
}

.page-faq .key-card--warn .dot-list li::before {
  background: var(--amber);
}

/* ---------- 字段表 ---------- */

.page-faq .table-scroll {
  margin-top: 22px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .field-table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  border: 2px solid var(--line);
  background: var(--panel);
}

.page-faq .field-table th {
  text-align: left;
  padding: 12px 14px;
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan);
  background: rgba(23, 224, 176, 0.08);
  border-bottom: 2px solid var(--line);
  white-space: nowrap;
}

.page-faq .field-table td {
  padding: 12px 14px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--muted);
  border-bottom: 1px solid rgba(42, 53, 80, 0.85);
  vertical-align: top;
}

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

.page-faq .field-table td:first-child {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
}

/* ---------- 图片容器 ---------- */

.page-faq .media-frame {
  margin: 26px 0 0;
  border: 2px solid var(--line);
  background: var(--panel);
  padding: 10px;
  box-shadow: var(--hard);
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(42, 53, 80, 0.9);
}

.page-faq .media-frame figcaption {
  padding: 10px 2px 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 侧栏 ---------- */

.page-faq .faq-aside {
  display: grid;
  gap: 18px;
}

.page-faq .mini-toc {
  border: 2px solid var(--line);
  background: var(--card);
  box-shadow: var(--hard);
}

.page-faq .mini-toc-title {
  margin: 0;
  padding: 14px 16px;
  border-bottom: 2px solid var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .mini-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .mini-toc a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 11px 16px;
  border-bottom: 1px solid rgba(42, 53, 80, 0.75);
  font-size: 14px;
  color: var(--muted);
  border-left: 3px solid transparent;
  transition: color 160ms ease, background 160ms ease, border-left-color 160ms ease;
}

.page-faq .mini-toc li:last-child a {
  border-bottom: 0;
}

.page-faq .mini-toc a .mono {
  font-size: 12px;
  color: var(--violet);
  letter-spacing: 0.06em;
}

.page-faq .mini-toc a:hover,
.page-faq .mini-toc a:focus-visible {
  color: var(--text);
  background: rgba(23, 224, 176, 0.08);
  border-left-color: var(--cyan);
  outline: none;
}

.page-faq .aside-card {
  border: 2px solid var(--line);
  background: var(--panel);
  padding: 18px;
}

.page-faq .aside-card-title {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-faq .aside-card p {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .aside-links {
  display: grid;
  gap: 8px;
}

.page-faq .aside-links .btn {
  width: 100%;
  text-align: center;
  border-bottom: 2px solid var(--line);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .key-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .entry-title {
    flex-basis: 0;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }

  .page-faq .doc-map {
    grid-template-columns: minmax(228px, 1fr) minmax(0, 3fr);
  }

  .page-faq .map-legend {
    border-bottom: 0;
    border-right: 2px solid var(--line);
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 96px;
  }

  .page-faq .lead {
    font-size: 17px;
  }
}

@media (max-width: 560px) {
  .page-faq .hero-stats {
    grid-template-columns: 1fr;
  }

  .page-faq .hero-stats li {
    border-right: 0;
    border-bottom: 1px solid rgba(42, 53, 80, 0.85);
  }

  .page-faq .hero-stats li:last-child {
    border-bottom: 0;
  }

  .page-faq .step {
    grid-template-columns: 2.9em 1fr;
  }

  .page-faq .step-no {
    font-size: 12px;
    padding: 16px 4px;
  }

  .page-faq .step-body {
    padding: 14px 14px 16px;
  }

  .page-faq .entry-no {
    min-width: 3.2em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .mini-toc a,
  .page-faq .map-group > summary {
    transition: none;
  }
}