.page-faq {
  --faq-radius: 2px;
  --faq-sticky-top: calc(var(--bar-h) + 20px);
  padding: calc(var(--bar-h) + 28px) 0 clamp(56px, 8vw, 96px);
  color: var(--ink);
  background:
    radial-gradient(120% 55% at 88% -8%, rgba(76, 123, 255, .18), transparent 62%),
    radial-gradient(90% 45% at -5% 18%, rgba(255, 61, 190, .10), transparent 66%);
}

.page-faq .container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: end;
  margin-bottom: clamp(36px, 6vw, 72px);
}

.page-faq .faq-hero-copy {
  max-width: 720px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
}

.page-faq h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 5.4vw, 4.1rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-shadow: 0 0 26px rgba(43, 245, 224, .28);
}

.page-faq .faq-lead {
  margin: 0 0 12px;
  max-width: 640px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-lead--sub {
  color: var(--ink);
  padding-left: 12px;
  border-left: 2px solid var(--orange);
}

.page-faq .hero-media {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 0 0 1px rgba(43, 245, 224, .08), 0 18px 46px rgba(0, 0, 0, .45);
}

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

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(24px, 3vw, 44px);
  align-items: start;
}

/* ---------- 索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line-soft);
  background: var(--glass);
  padding: 16px 14px;
  backdrop-filter: blur(4px);
}

.page-faq .index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  font-size: .95rem;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .faq-index-link .mono {
  color: var(--yellow);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--ink);
  border-left-color: var(--cyan);
  background: rgba(43, 245, 224, .07);
}

.page-faq .faq-index-link:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ---------- 分组 ---------- */
.page-faq .qa-group {
  border-top: 1px solid var(--line);
  padding-top: clamp(20px, 3vw, 30px);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-faq .qa-group + .qa-group {
  margin-top: clamp(36px, 5vw, 72px);
}

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

.page-faq .group-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--yellow);
}

.page-faq .group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.3rem, 2.6vw, 1.95rem);
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .group-note {
  margin: 0 0 8px;
  max-width: 68ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .group-media {
  margin: 18px 0 6px;
  border: 1px solid var(--line-soft);
  background: var(--jade);
}

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

.page-faq .qa[open] {
  background: linear-gradient(90deg, rgba(43, 245, 224, .055), transparent 62%);
}

.page-faq .qa-summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 4px;
  cursor: pointer;
  list-style: none;
  transition: color 200ms var(--ease);
}

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

.page-faq .qa-summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-faq .qa-num {
  flex: none;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .qa-q {
  font-size: clamp(1rem, 1.5vw, 1.08rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .qa-summary:hover .qa-q {
  color: var(--cyan);
}

.page-faq .qa-mark {
  flex: none;
  margin-left: auto;
  width: 24px;
  height: 24px;
  border: 1px solid var(--line);
  border-radius: 50%;
  position: relative;
  transition: transform 240ms var(--ease), border-color 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}

.page-faq .qa-mark::before {
  inset: 50% 6px auto;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .qa-mark::after {
  inset: 6px 50% 6px auto;
  width: 1px;
  transform: translateX(50%);
  transition: transform 240ms var(--ease);
}

.page-faq .qa[open] .qa-mark {
  transform: rotate(180deg);
  border-color: var(--cyan);
  box-shadow: 0 0 14px rgba(43, 245, 224, .38);
}

.page-faq .qa[open] .qa-mark::after {
  transform: translateX(50%) scaleY(0);
}

.page-faq .qa-body {
  padding: 0 4px 22px 40px;
  max-width: 72ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

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

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

.page-faq .qa-body a:hover {
  color: var(--orange);
}

.page-faq .qa-lead {
  color: var(--ink);
}

.page-faq .qa-lead strong {
  color: var(--cyan);
  font-weight: 600;
}

.page-faq .qa-data {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--yellow);
  letter-spacing: .02em;
  word-break: break-word;
}

.page-faq .qa-steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 6px 0 6px 14px;
  border-left: 2px solid var(--magenta);
  display: grid;
  gap: 7px;
  font-size: .95rem;
  color: var(--ink);
}

.page-faq .qa-steps li {
  display: flex;
  gap: 10px;
  line-height: 1.7;
}

.page-faq .qa-steps li::before {
  content: "›";
  flex: none;
  font-family: var(--font-mono);
  color: var(--magenta);
}

/* ---------- 维护时间条 ---------- */
.page-faq .timebar {
  margin-top: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(26, 16, 48, .9), rgba(11, 6, 22, .9));
}

.page-faq .tb-track {
  display: flex;
  gap: 1px;
  height: 36px;
}

.page-faq .tb-seg {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .04em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .tb-seg--normal {
  background: rgba(76, 123, 255, .16);
}

.page-faq .tb-seg--maint {
  flex: 1 1 0;
  background: linear-gradient(180deg, rgba(255, 61, 190, .42), rgba(255, 61, 190, .14));
  border-inline: 1px solid rgba(255, 61, 190, .55);
  color: var(--ink);
  cursor: help;
  overflow: visible;
}

.page-faq .tb-seg--maint:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-faq .tb-tip {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  width: min(240px, 70vw);
  padding: 9px 11px;
  transform: translateX(-50%) translateY(4px);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(0, 0, 0, .5);
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: 0;
  white-space: normal;
  color: var(--ink);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

.page-faq .tb-seg--maint:hover .tb-tip,
.page-faq .tb-seg--maint:focus-visible .tb-tip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.page-faq .tb-axis {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(44px, 6vw, 78px);
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(58, 14, 36, .8), rgba(26, 16, 48, .9));
  display: grid;
  gap: 18px;
}

.page-faq .faq-cta .eyebrow {
  margin: 0 0 10px;
}

.page-faq .cta-title {
  margin: 0 0 8px;
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .cta-note {
  margin: 0;
  max-width: 60ch;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
    align-self: start;
  }

  .page-faq .qa-body {
    padding-left: 46px;
  }
}

@media (min-width: 1440px) {
  .page-faq .faq-body {
    grid-template-columns: 280px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-mark,
  .page-faq .qa-mark::after,
  .page-faq .faq-index-link,
  .page-faq .tb-tip {
    transition: none;
  }
}