.page-faq {
  --faq-pad: clamp(18px, 2.6vw, 32px);
  --faq-gap: clamp(18px, 3vw, 34px);
  --faq-dash: rgba(147, 167, 184, 0.36);
  scroll-behavior: smooth;
  padding-bottom: clamp(40px, 6vw, 88px);
}

/* 顶部主题声明 */
.page-faq .faq-intro {
  max-width: 44rem;
  padding: clamp(26px, 4.6vw, 60px) 0 clamp(22px, 3.4vw, 44px);
}

.page-faq .faq-intro .display {
  margin: 0.32em 0 0.55em;
}

.page-faq .faq-intro .lede {
  color: var(--text);
  max-width: 38em;
}

/* 通栏路径图 */
.page-faq .faq-flow {
  margin: 0 0 clamp(34px, 5.4vw, 68px);
}

.page-faq .faq-flow .figure__media {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

/* 快速处置卡片 */
.page-faq .fix-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .fix-card {
  position: relative;
  padding: var(--faq-pad);
  border: 1px solid var(--line);
  border-top: 2px solid var(--signal);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(19, 41, 75, 0.7), rgba(11, 27, 51, 0.28));
  box-shadow: var(--shadow);
  transition: border-color var(--t) ease, box-shadow var(--t) ease;
  scroll-margin-top: 88px;
}

.page-faq .fix-card:nth-child(2) {
  border-top-color: var(--alert);
}

.page-faq .fix-card:nth-child(3) {
  border-top-color: var(--ochre);
}

.page-faq .fix-card:hover,
.page-faq .fix-card:focus-within {
  border-color: var(--line-signal);
  box-shadow: 0 0 0 1px rgba(0, 229, 199, 0.32), var(--shadow);
}

.page-faq .fix-card__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  padding: 4px 9px;
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--signal);
}

.page-faq .fix-card:nth-child(2) .fix-card__no {
  background: var(--alert);
}

.page-faq .fix-card:nth-child(3) .fix-card__no {
  background: var(--ochre);
}

.page-faq .fix-card__title {
  margin: 18px 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.3vw, 1.55rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-faq .fix-card__link {
  color: var(--hi);
  text-decoration: none;
  background-image: linear-gradient(var(--signal), var(--signal));
  background-repeat: no-repeat;
  background-size: 0% 1px;
  background-position: 0 100%;
  transition: background-size var(--t) ease, color var(--t) ease;
}

.page-faq .fix-card__link:hover,
.page-faq .fix-card__link:focus-visible {
  background-size: 100% 1px;
  color: #ffffff;
}

.page-faq .fix-card__cue {
  margin: 0 0 20px;
  padding-left: 12px;
  border-left: 2px solid var(--alert);
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .fix-card:nth-child(3) .fix-card__cue {
  border-left-color: var(--ochre);
}

/* 有序步骤 */
.page-faq .steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .steps li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text);
}

.page-faq .steps__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--signal);
  padding-top: 5px;
}

/* 主题分组 */
.page-faq .topic {
  margin-top: clamp(34px, 5vw, 64px);
  scroll-margin-top: 88px;
}

.page-faq .topic__head {
  position: relative;
  margin: 0 0 20px;
  padding: 4px 0 4px 16px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(1.04rem, 1.9vw, 1.28rem);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--hi);
  border-left: 2px solid var(--alert);
}

.page-faq .topic:target .topic__head::after {
  content: "";
  position: absolute;
  inset: -6px -10px;
  background: rgba(255, 122, 69, 0.2);
  border-radius: var(--radius);
  z-index: -1;
  animation: faq-flash 2s ease forwards;
}

@keyframes faq-flash {
  0%, 30% { opacity: 1; }
  100% { opacity: 0; }
}

.page-faq .topic--split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-faq .topic__aside {
  margin: 0;
}

.page-faq .topic__aside .figure__media {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

/* 折叠问答 */
.page-faq .qa {
  border-top: 1px dashed var(--faq-dash);
}

.page-faq .fold {
  border-bottom: 1px dashed var(--faq-dash);
}

.page-faq .fold__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.01rem;
  line-height: 1.62;
  color: var(--text);
  transition: color var(--t) ease, padding-left var(--t) ease;
}

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

.page-faq .fold__head::marker {
  content: "";
}

.page-faq .fold__head:hover,
.page-faq .fold__head:focus-visible {
  color: var(--hi);
  padding-left: 6px;
}

.page-faq .fold__head:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .fold__mark {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: 9px;
  border-radius: 1px;
  background: var(--alert);
  transition: transform var(--t) ease, background var(--t) ease;
}

.page-faq .fold[open] .fold__mark {
  transform: rotate(45deg);
  background: var(--signal);
}

.page-faq .fold__body {
  max-width: 40rem;
  padding: 0 0 22px;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .fold__body p {
  margin: 0 0 12px;
}

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

.page-faq .fold__body .steps {
  margin-bottom: 14px;
}

/* 版本复制条 */
.page-faq .version-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin: 16px 0 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--signal);
  border-radius: var(--radius);
  background: rgba(19, 41, 75, 0.55);
}

.page-faq .version-row__label,
.page-faq .version-row__hint {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .version-chip {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 5px 13px;
  border: 1px solid var(--signal);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--signal);
  cursor: pointer;
  transition: background var(--t) ease, color var(--t) ease, border-color var(--t) ease;
}

.page-faq .version-chip:hover,
.page-faq .version-chip:focus-visible {
  background: var(--signal-deep);
  border-color: var(--signal-deep);
  color: var(--hi);
}

.page-faq .version-chip:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* 联系提示面板 */
.page-faq .help-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.6vw, 46px);
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(140deg, rgba(0, 229, 199, 0.08), rgba(11, 27, 51, 0) 46%),
    linear-gradient(180deg, var(--ink-2), var(--ink) 72%);
  box-shadow: var(--shadow);
}

.page-faq .help-panel__main .h2 {
  margin: 0.4em 0 0.6em;
}

.page-faq .help-panel__lead {
  margin: 0 0 16px;
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--hi);
}

.page-faq .help-panel__aside {
  padding-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--line);
}

.page-faq .help-panel__note {
  margin: 16px 0 14px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

/* 底部相关栏目 */
.page-faq .faq-foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 18px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

/* 移动端优先 → 平板与桌面 */
@media (min-width: 720px) {
  .page-faq .fix-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .fix-card:nth-child(2) {
    padding-top: calc(var(--faq-pad) + 22px);
  }

  .page-faq .fix-card:nth-child(3) {
    padding-top: calc(var(--faq-pad) + 44px);
  }
}

@media (min-width: 900px) {
  .page-faq .topic--split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

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

  .page-faq .help-panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .help-panel__aside {
    padding-top: 0;
    padding-left: clamp(20px, 3vw, 40px);
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq,
  .page-faq * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}