.page-faq {
  --faq-panel: rgba(16, 54, 92, .62);
  --faq-radius-sm: 10px;
  background-color: var(--deep);
  color: var(--ice);
  overflow-x: hidden;
}

.page-faq .faq-sep {
  margin: 0 8px;
  color: var(--reef);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 56px;
  border-bottom: 1px solid var(--reef);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 78% at 10% 0%, rgba(56, 240, 208, .17), transparent 68%),
    radial-gradient(46% 66% at 94% 12%, rgba(255, 106, 43, .15), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 7.2vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-faq .faq-hero__intro {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .84;
}

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

.page-faq .faq-hero__panel {
  padding: 20px 20px 18px;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
}

.page-faq .faq-hero__panel-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .faq-hero__ver {
  margin: 4px 0 18px;
  font-family: var(--font-mono);
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.page-faq .faq-hero__facts div {
  padding-top: 10px;
  border-top: 1px solid var(--reef);
}

.page-faq .faq-hero__facts dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-faq .faq-hero__facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}

/* ---------- 分栏骨架 ---------- */
.page-faq .faq-body {
  padding: 48px 0 72px;
}

.page-faq .faq-rail {
  margin-bottom: 36px;
}

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

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-faq .faq-scale {
  display: flex;
  gap: 8px;
  margin: 0 0 14px;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}

.page-faq .faq-scale__link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 78px;
  padding: 10px 12px;
  border: 1px solid var(--reef);
  border-radius: var(--faq-radius-sm);
  background: var(--faq-panel);
  text-decoration: none;
  transition: border-color .2s ease, background .2s ease;
}

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

.page-faq .faq-scale__link.is-active {
  border-color: var(--orange);
  background: rgba(255, 106, 43, .12);
}

.page-faq .faq-scale__ver {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  color: var(--ice);
}

.page-faq .faq-scale__link.is-active .faq-scale__ver {
  color: var(--orange);
}

.page-faq .faq-scale__txt {
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-rail__note {
  margin: 0 0 18px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-rail__jump {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--reef);
}

.page-faq .faq-rail__jump a {
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-rail__jump a:hover {
  text-decoration: underline;
}

/* ---------- 区块通用 ---------- */
.page-faq .faq-block {
  margin-bottom: 64px;
}

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

.page-faq .faq-block__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(22px, 4.6vw, 30px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--ice);
}

.page-faq .faq-block__lead {
  margin: 0 0 24px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .78;
}

.page-faq .faq-block a {
  color: var(--cyan);
}

/* ---------- V4 三件事 ---------- */
.page-faq .faq-whats {
  display: grid;
  gap: 14px;
}

.page-faq .faq-what {
  position: relative;
  padding: 22px 18px 20px;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(16, 54, 92, .78), rgba(12, 39, 69, .95));
}

.page-faq .faq-what::before {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  width: 44px;
  height: 2px;
  background: var(--cyan);
}

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

.page-faq .faq-what h3 {
  margin: 10px 0 8px;
  font-size: 18px;
  line-height: 1.35;
  color: var(--ice);
}

.page-faq .faq-what p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-what__foot {
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--orange);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .86;
}

/* ---------- 分类 ---------- */
.page-faq .faq-catshot {
  margin: 0 0 20px;
  border-radius: var(--radius);
  border: 1px solid var(--reef);
  overflow: hidden;
}

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-faq .faq-cat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 16px;
  border: 1px solid var(--reef);
  border-radius: var(--faq-radius-sm);
  background: var(--faq-panel);
  transition: border-color .2s ease, transform .2s ease;
}

.page-faq .faq-cat:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .faq-cat__icon {
  width: 26px;
  height: 26px;
  color: var(--cyan);
}

.page-faq .faq-cat__name {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ice);
}

.page-faq .faq-cat__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--amber);
}

/* ---------- 更新日志 ---------- */
.page-faq .faq-log {
  display: grid;
  gap: 34px;
}

.page-faq .faq-log__entry {
  position: relative;
  padding-left: 26px;
}

.page-faq .faq-log__entry::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: -34px;
  width: 1px;
  background: var(--reef);
}

.page-faq .faq-log__entry:last-child::before {
  bottom: 12px;
}

.page-faq .faq-log__entry::after {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--reef);
  border-radius: 50%;
  background: var(--deep);
}

.page-faq .faq-log__entry.is-active::after {
  border-color: var(--orange);
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 43, .18);
}

.page-faq .faq-log__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin: 0;
}

.page-faq .faq-log__ver {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--ice);
}

.page-faq .faq-log__entry.is-active .faq-log__ver {
  color: var(--orange);
}

.page-faq .faq-log__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ice);
}

.page-faq .faq-log__note {
  margin: 8px 0 14px;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-log__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-log__list li {
  display: flex;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ice);
  opacity: .88;
}

.page-faq .faq-log__list .chip {
  flex: 0 0 auto;
  align-self: flex-start;
  margin-top: 3px;
}

.page-faq .chip--fix {
  color: var(--teal);
  border-color: rgba(14, 124, 107, .6);
  background: rgba(14, 124, 107, .16);
}

/* ---------- 三步操作 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 14px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps__item {
  padding: 20px 18px;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  background: var(--faq-panel);
}

.page-faq .faq-steps__idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
}

.page-faq .faq-steps__item h3 {
  margin: 14px 0 8px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ice);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-stepshot {
  margin: 0;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ---------- 问题自查 ---------- */
.page-faq .faq-qa {
  display: grid;
  gap: 10px;
}

.page-faq .faq-qa details {
  border: 1px solid var(--reef);
  border-radius: var(--faq-radius-sm);
  background: var(--faq-panel);
  transition: border-color .2s ease;
}

.page-faq .faq-qa details[open] {
  border-color: rgba(56, 240, 208, .45);
}

.page-faq .faq-qa summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--ice);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-qa summary::before {
  content: "";
  flex: 0 0 auto;
  width: 0;
  height: 0;
  border-left: 6px solid var(--cyan);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transition: transform .2s ease;
}

.page-faq .faq-qa details[open] summary::before {
  transform: rotate(90deg);
}

.page-faq .faq-qa__body {
  margin: 0;
  padding: 0 18px 18px 36px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .84;
}

/* ---------- 联系帮助 ---------- */
.page-faq .faq-help {
  padding: 26px 20px;
  border: 1px solid var(--reef);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(56, 240, 208, .12), rgba(255, 106, 43, .12));
}

.page-faq .faq-help__txt {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
  opacity: .88;
}

.page-faq .faq-help .cta-row {
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-whats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 44px 0 72px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, .7fr);
    gap: 52px;
    align-items: end;
  }

  .page-faq .faq-body {
    padding: 64px 0 96px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    align-self: start;
    margin-bottom: 0;
  }

  .page-faq .faq-scale {
    flex-direction: column;
    overflow: visible;
  }

  .page-faq .faq-scale__link {
    flex-direction: row;
    align-items: baseline;
    gap: 12px;
    min-width: 0;
  }

  .page-faq .faq-block {
    margin-bottom: 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-scale__link,
  .page-faq .faq-qa summary::before {
    transition: none;
  }

  .page-faq .faq-cat:hover {
    transform: none;
  }
}