.page-faq {
  --faq-step-line: rgba(51, 80, 122, 0.6);
  --faq-rule-line: rgba(137, 150, 172, 0.28);
  padding-bottom: 88px;
  color: var(--paper-100);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-faq .mono {
  font-family: var(--font-mono);
  color: var(--gold-400);
  letter-spacing: 0.02em;
}

.page-faq .breadcrumbs {
  padding: 20px 0 4px;
}

.page-faq .prose {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate-400);
}

.page-faq .annotation {
  margin: 18px 0 0;
  padding: 10px 14px;
  border-left: 3px solid var(--gold-400);
  background: rgba(137, 150, 172, 0.08);
  font-size: 13px;
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 30px;
  padding: 20px 0 52px;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(34px, 7vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate-400);
}

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

.page-faq .faq-hero__board {
  position: relative;
  padding: 22px 20px 18px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900));
  box-shadow: 5px 7px 0 rgba(11, 18, 32, 0.55);
}

.page-faq .faq-hero__board::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 26px;
  height: 26px;
  background: linear-gradient(225deg, var(--ink-900) 50%, var(--ink-700) 50%);
  border-left: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero__board-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate-400);
}

.page-faq .issue-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-faq .issue-list__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 12px;
  border-top: 1px solid var(--faq-rule-line);
  color: var(--paper-100);
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .issue-list__item:last-child .issue-list__link {
  border-bottom: 1px solid var(--faq-rule-line);
}

.page-faq .issue-list__link:hover {
  background: rgba(215, 164, 69, 0.09);
  padding-left: 18px;
}

.page-faq .issue-list__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--gold-400);
  letter-spacing: 0.04em;
}

.page-faq .issue-list__text {
  flex: 1;
  font-size: 15px;
  line-height: 1.6;
}

.page-faq .issue-list__arrow {
  flex: none;
  font-family: var(--font-mono);
  color: var(--slate-400);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .issue-list__link:hover .issue-list__arrow {
  color: var(--gold-200);
  transform: translateX(3px);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 38px;
  padding-top: 12px;
}

.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-toc {
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
  padding: 16px 16px 12px;
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-400);
}

.page-faq .toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
}

.page-faq .toc-list__item {
  border-top: 1px solid var(--faq-rule-line);
}

.page-faq .toc-link {
  display: block;
  padding: 10px 4px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--slate-400);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .toc-link:hover,
.page-faq .toc-link[aria-current="true"] {
  color: var(--gold-400);
  padding-left: 10px;
}

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  padding-left: 10px;
  border-left: 3px solid var(--line-600);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-faq .faq-main {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 116px;
}

.page-faq .section-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .section-index {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold-400);
}

.page-faq .section-title h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.2;
  color: var(--paper-100);
}

.page-faq .faq-band {
  height: 8px;
  margin: 48px 0;
  background: repeating-linear-gradient(
    90deg,
    var(--clay-500) 0 16px,
    var(--ink-800) 16px 48px,
    var(--gold-400) 48px 56px,
    var(--ink-800) 56px 96px,
    var(--line-600) 96px 102px,
    var(--ink-800) 102px 148px
  );
  opacity: 0.55;
}

/* ---------- 版本判断规则 ---------- */
.page-faq .rule-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
}

.page-faq .rule-list__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 2px;
  border-top: 1px solid var(--faq-rule-line);
}

.page-faq .rule-list__item:last-child {
  border-bottom: 1px solid var(--faq-rule-line);
}

.page-faq .rule-list__item .status-dot {
  margin-top: 9px;
}

.page-faq .rule-list__item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper-100);
}

/* ---------- 登录排查步骤 ---------- */
.page-faq .step-list {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .step-list__item {
  position: relative;
  padding: 0 0 24px 48px;
}

.page-faq .step-list__item::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 34px;
  bottom: -6px;
  width: 1px;
  background: var(--faq-step-line);
}

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

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

.page-faq .step-list__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold-400);
  border-radius: 50%;
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold-400);
  letter-spacing: 0.02em;
}

.page-faq .step-list__title {
  margin: 2px 0 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 20px;
  line-height: 1.3;
  color: var(--paper-100);
}

.page-faq .step-list__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-faq .step-list__check {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--celadon-400);
}

/* ---------- 折叠面板 ---------- */
.page-faq .disclosure {
  margin-top: 26px;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-faq .disclosure summary {
  padding: 14px 16px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--gold-200);
  list-style: none;
}

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

.page-faq .disclosure summary::before {
  content: "+ ";
  color: var(--gold-400);
}

.page-faq .disclosure[open] summary::before {
  content: "− ";
}

.page-faq .disclosure__body {
  padding: 0 16px 18px;
  border-top: 1px solid var(--faq-rule-line);
}

.page-faq .disclosure__body p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-400);
}

/* ---------- 导出两条路径 ---------- */
.page-faq .path-split {
  display: grid;
  gap: 14px;
  margin-bottom: 22px;
}

.page-faq .path-split__col {
  padding: 18px 16px;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
  border-top-width: 3px;
}

.page-faq .path-split__col--legacy {
  border-top-color: var(--clay-500);
}

.page-faq .path-split__col--current {
  border-top-color: var(--gold-400);
}

.page-faq .path-split__tag {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--slate-400);
}

.page-faq .path-split__step {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--paper-100);
}

.page-faq .path-split__meta {
  margin: 6px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--line-600);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ---------- 纸面卡片 ---------- */
.page-faq .paper-card {
  margin-top: 22px;
  padding: 22px 20px;
  border: 1px solid var(--line-hard);
  background: var(--paper-100);
  color: var(--paper-ink);
  box-shadow: 4px 6px 0 rgba(11, 18, 32, 0.6), 8px 12px 0 rgba(11, 18, 32, 0.26);
}

.page-faq .paper-card .card-heading {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 21px;
  line-height: 1.3;
  color: var(--paper-ink);
}

.page-faq .paper-card .card-text {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(20, 26, 38, 0.82);
}

.page-faq .paper-card .card-text:last-child {
  margin-bottom: 0;
}

/* ---------- 对照工具条 ---------- */
.page-faq .compare-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.page-faq .compare-toolbar__hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-faq .version-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-faq .version-switch__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--slate-400);
}

.page-faq .version-switch__btn {
  padding: 5px 13px;
  border: 1px solid var(--line-soft);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper-100);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .version-switch__btn:hover {
  border-color: var(--gold-200);
  color: var(--gold-200);
}

.page-faq .version-switch__btn.is-version-active {
  border-color: var(--gold-400);
  color: var(--gold-400);
  background: rgba(215, 164, 69, 0.1);
}

/* ---------- 对照表 ---------- */
.page-faq .table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
  -webkit-overflow-scrolling: touch;
}

.page-faq .data-table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .data-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--slate-400);
  background: var(--ink-700);
  border-bottom: 1px solid var(--line-600);
}

.page-faq .data-table tbody th {
  padding: 11px 14px;
  text-align: left;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-100);
  border-bottom: 1px solid var(--faq-rule-line);
  white-space: nowrap;
}

.page-faq .data-table td {
  padding: 11px 14px;
  font-size: 14px;
  line-height: 1.7;
  border-bottom: 1px solid var(--faq-rule-line);
  border-left: 1px solid var(--faq-rule-line);
  transition: opacity var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .data-table td[data-version-column="3.4"] {
  color: var(--slate-400);
  opacity: 0.72;
}

.page-faq .data-table td[data-version-column="3.5.1"] {
  color: var(--paper-100);
  opacity: 0.72;
}

.page-faq .data-table td[data-version-column].is-version-active {
  opacity: 1;
  background: rgba(215, 164, 69, 0.1);
  box-shadow: inset 2px 0 0 var(--gold-400);
}

.page-faq .data-table tbody tr:last-child th,
.page-faq .data-table tbody tr:last-child td {
  border-bottom: none;
}

/* ---------- 复制块 ---------- */
.page-faq .copy-block {
  margin-top: 18px;
  border: 1px solid var(--line-hard);
  background: var(--paper-100);
  box-shadow: 4px 6px 0 rgba(11, 18, 32, 0.55);
}

.page-faq .copy-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(20, 26, 38, 0.16);
  background: var(--paper-200);
}

.page-faq .copy-block__title {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--paper-ink);
}

.page-faq .code-path {
  margin: 0;
  padding: 16px 14px;
  background: var(--paper-100);
  color: var(--paper-ink);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.95;
  letter-spacing: 0.01em;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-faq .copy-btn {
  padding: 7px 14px;
  border: 1px solid var(--celadon-700);
  background: var(--celadon-700);
  color: var(--paper-100);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .copy-btn:hover {
  background: var(--celadon-400);
  border-color: var(--celadon-400);
  color: var(--ink-900);
}

.page-faq .copy-btn[data-copied] {
  background: var(--gold-400);
  border-color: var(--gold-400);
  color: var(--ink-900);
}

/* ---------- 提交 ---------- */
.page-faq .check-list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .check-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(20, 26, 38, 0.82);
}

.page-faq .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--celadon-700);
  background: rgba(76, 169, 140, 0.16);
}

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

/* ---------- 图片框 ---------- */
.page-faq .media-frame {
  display: block;
  margin: 22px 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
  overflow: hidden;
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: brightness(0.86) saturate(0.9);
}

.page-faq .media-frame__caption {
  padding: 9px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ---------- 焦点可见 ---------- */
.page-faq a:focus-visible,
.page-faq button:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--celadon-400);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .path-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-hero {
    padding: 28px 0 60px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
    padding-bottom: 72px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail__inner {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-section {
    scroll-margin-top: 128px;
  }

  .page-faq .faq-band {
    margin: 60px 0;
  }
}

@media (min-width: 1200px) {
  .page-faq .copy-block {
    max-width: 780px;
  }

  .page-faq .paper-card {
    padding: 26px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .issue-list__link,
  .page-faq .issue-list__arrow,
  .page-faq .toc-link,
  .page-faq .copy-btn,
  .page-faq .version-switch__btn,
  .page-faq .data-table td {
    transition: none;
  }

  .page-faq .issue-list__link:hover,
  .page-faq .toc-link:hover {
    padding-left: 0;
  }

  .page-faq .issue-list__link:hover .issue-list__arrow {
    transform: none;
  }
}