.page-faq {
  --faq-line: rgba(62, 92, 82, 0.55);
  --faq-line-soft: rgba(62, 92, 82, 0.3);
  display: block;
}

/* ---------- 面包屑以下的首屏 ---------- */
.page-faq .breadcrumb {
  padding-top: 24px;
}

.page-faq .lede {
  display: grid;
  gap: 32px;
  padding: 32px 0 40px;
  align-items: center;
}

.page-faq .lede-copy {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-faq .lede-copy h1 {
  font-family: var(--font-head);
  font-size: var(--step-40);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0;
  max-width: 20ch;
}

.page-faq .lede-copy .prose {
  color: var(--muted);
  max-width: 60ch;
}

.page-faq .lede-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-faq .lede-media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--faq-line-soft);
}

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

@media (min-width: 960px) {
  .page-faq .lede {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 56px;
    padding: 48px 0 64px;
  }
  .page-faq .lede-media {
    grid-column: 1;
    grid-row: 1;
    order: -1;
  }
  .page-faq .lede-copy {
    grid-column: 2;
    grid-row: 1;
  }
}

/* ---------- 场景筛选 ---------- */
.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 0 24px;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .filter-btn {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* ---------- 侧栏 + 问答流 ---------- */
.page-faq .stage {
  display: grid;
  gap: 40px;
  padding: 32px 0 72px;
  align-items: start;
}

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

.page-faq .rail-title {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin: 0 0 12px;
}

.page-faq .rail-list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .rail-list::-webkit-scrollbar {
  display: none;
}

.page-faq .rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius);
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-faq .rail-link:hover,
.page-faq .rail-link:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan);
}

.page-faq .rail-num {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .rail-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .rail-status .status-dot {
  flex: none;
}

.page-faq .rail-status-text {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

@media (min-width: 1000px) {
  .page-faq .stage {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
    padding: 40px 0 96px;
  }
  .page-faq .anchor-rail {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }
  .page-faq .rail-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .rail-link {
    width: 100%;
    border-color: transparent;
    border-left: 2px solid var(--faq-line-soft);
    border-radius: 0;
    padding: 10px 8px 10px 14px;
  }
  .page-faq .rail-link:hover,
  .page-faq .rail-link:focus-visible {
    border-left-color: var(--cyan);
    background-color: rgba(43, 227, 192, 0.05);
  }
}

/* ---------- 问答分组 ---------- */
.page-faq .qa-stream {
  min-width: 0;
}

.page-faq .qa-group {
  position: relative;
  padding: 32px 0 8px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .qa-group::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(43, 227, 192, 0));
  transform: skewX(-32deg);
  transform-origin: left center;
}

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

.page-faq .qa-group:first-child::before {
  display: none;
}

.page-faq .group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 10px;
}

.page-faq .group-index {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .group-title {
  font-family: var(--font-head);
  font-size: var(--step-28);
  line-height: 1.3;
  color: var(--paper);
  margin: 0;
  letter-spacing: -0.005em;
}

.page-faq .group-note {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.7;
  max-width: 56ch;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: 0;
}

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

.page-faq .qa summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 16px 38px 16px 0;
  color: var(--paper);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-weight: 500;
  transition: color 0.25s var(--ease);
}

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

.page-faq .qa summary::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.3s var(--ease);
}

.page-faq .qa[open] summary::after {
  transform: translateY(-30%) rotate(225deg);
}

.page-faq .qa summary:hover,
.page-faq .qa summary:focus-visible {
  color: var(--cyan-soft);
}

.page-faq .qa[open] {
  border-bottom-color: var(--line);
}

.page-faq .qa-body {
  position: relative;
  padding: 2px 0 20px 20px;
  color: var(--paper);
  font-size: 1rem;
  line-height: 1.78;
  max-width: 68ch;
}

.page-faq .qa-body::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 22px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(43, 227, 192, 0.05));
}

.page-faq .qa-body p {
  margin: 0 0 10px;
}

.page-faq .qa-body p:last-child {
  margin-bottom: 0;
}

.page-faq .qa-body .mono-data {
  color: var(--cyan-soft);
}

.page-faq .inline-link {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .inline-link:hover,
.page-faq .inline-link:focus-visible {
  color: var(--cyan-soft);
}

.page-faq .step-list {
  counter-reset: step;
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .step-list li {
  position: relative;
  counter-increment: step;
  padding-left: 34px;
}

.page-faq .step-list li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 反馈章节 ---------- */
.page-faq .qa-group--support {
  padding-bottom: 8px;
}

.page-faq .support-layout {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-faq .support-body {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-faq .support-body .prose {
  color: var(--muted);
  margin: 0;
}

.page-faq .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 14px 16px;
  background-color: var(--ink-800);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-faq .copy-label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-faq .copy-value {
  font-size: 0.9375rem;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .copy-btn {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-900);
  background-color: var(--cyan);
  border: 0;
  border-radius: var(--radius);
  padding: 7px 14px;
  cursor: pointer;
  transition: background-color 0.25s var(--ease);
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  background-color: var(--cyan-soft);
}

.page-faq .copy-status {
  margin: 0;
  min-height: 1.2em;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-faq .support-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-faq .support-media {
  margin: 0;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--faq-line-soft);
}

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

.page-faq .support-media .media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 16px 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--paper);
  background: linear-gradient(180deg, rgba(6, 19, 15, 0), rgba(6, 19, 15, 0.92));
}

@media (min-width: 860px) {
  .page-faq .support-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
  }
}

/* ---------- 筛选隐藏态 ---------- */
.page-faq .qa.is-filtered-out {
  display: none;
}

/* ---------- 极窄屏兜底 ---------- */
@media (max-width: 480px) {
  .page-faq .lede-copy h1 {
    max-width: none;
  }
  .page-faq .qa summary {
    padding-right: 30px;
    font-size: 1rem;
  }
  .page-faq .qa-body {
    padding-left: 16px;
  }
  .page-faq .filter-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .page-faq .filter-bar::-webkit-scrollbar {
    display: none;
  }
  .page-faq .filter-btn {
    white-space: nowrap;
  }
  .page-faq .copy-btn {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa summary::after,
  .page-faq .qa summary,
  .page-faq .rail-link,
  .page-faq .copy-btn {
    transition: none;
  }
}