.page-faq {
  --faq-index-w: 244px;
  --faq-pad-x: clamp(14px, 3vw, 24px);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-top: 18px;
  padding-bottom: 6px;
}
.page-faq .faq-crumbs .breadcrumbs {
  font-size: var(--fs-micro);
  color: var(--c-muted);
}
.page-faq .faq-crumbs .breadcrumbs a {
  color: var(--c-muted);
  text-decoration: none;
  transition: color var(--t-fast);
}
.page-faq .faq-crumbs .breadcrumbs a:hover,
.page-faq .faq-crumbs .breadcrumbs a:focus-visible {
  color: var(--c-cyan);
}
.page-faq .faq-crumbs [aria-current="page"] {
  color: var(--c-text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(780px 400px at 88% 4%, var(--purple-glow), transparent 62%),
    radial-gradient(560px 320px at 2% 98%, var(--cyan-glow), transparent 68%),
    var(--c-void);
  overflow: hidden;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px),
    linear-gradient(180deg, var(--line-soft) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: .45;
  mask-image: linear-gradient(140deg, #000 0%, transparent 62%);
  -webkit-mask-image: linear-gradient(140deg, #000 0%, transparent 62%);
}
.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
  padding: clamp(26px, 5vw, 48px) 0 clamp(30px, 6vw, 60px);
}
.page-faq .faq-hero__copy .eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 12px;
  border: 1px solid var(--c-purple);
  color: var(--c-purple);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .08em;
  background: rgba(139, 92, 246, .1);
}
.page-faq .faq-hero__copy h1 {
  margin: 0 0 16px;
  color: var(--c-text);
  line-height: 1.1;
  letter-spacing: -.01em;
}
.page-faq .faq-hero__copy .lede {
  margin: 0;
  max-width: 60ch;
  color: var(--c-muted);
  font-size: var(--fs-body);
  line-height: 1.85;
}
.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}
.page-faq .faq-metachip {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  color: var(--c-muted);
  font-size: var(--fs-micro);
}
.page-faq .faq-metachip .mono {
  color: var(--c-cyan);
  font-size: 1rem;
  letter-spacing: -.01em;
}
.page-faq .faq-hero__visual {
  margin: 0;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  position: relative;
}
.page-faq .faq-hero__visual::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 18px;
  width: 2px;
  height: 46px;
  background: var(--c-orange);
}
.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  padding-top: clamp(30px, 5vw, 54px);
  padding-bottom: clamp(56px, 9vw, 108px);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--c-line);
  background: linear-gradient(180deg, var(--c-panel) 0%, var(--c-void) 100%);
  padding: 16px 14px 14px;
}
.page-faq .faq-index__tag {
  display: block;
  padding-bottom: 11px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-cyan);
  font-size: var(--fs-micro);
  letter-spacing: .16em;
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--c-muted);
  font-size: var(--fs-small);
  text-decoration: none;
  transition: color var(--t-fast), background var(--t-fast), border-color var(--t-fast);
}
.page-faq .faq-index__list a .mono {
  color: var(--c-purple);
  font-size: var(--fs-micro);
  letter-spacing: .04em;
}
.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--c-text);
  background: rgba(139, 92, 246, .12);
  border-left-color: var(--c-purple);
}
.page-faq .faq-index__note {
  margin: 14px 4px 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  color: var(--c-muted);
  font-size: var(--fs-micro);
  line-height: 1.75;
}

/* ---------- 分类区块 ---------- */
.page-faq .faq-cat {
  padding-top: clamp(34px, 5vw, 62px);
}
.page-faq .faq-cat:first-child {
  padding-top: 0;
}
.page-faq .faq-cat__head {
  position: relative;
  padding-left: 46px;
  padding-bottom: 15px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--c-line);
}
.page-faq .faq-cat__num {
  position: absolute;
  left: 0;
  top: 4px;
  color: var(--c-purple);
  font-size: var(--fs-small);
  letter-spacing: .08em;
  transition: color var(--t-med);
}
.page-faq .faq-cat.is-active .faq-cat__num {
  color: var(--c-orange);
}
.page-faq .faq-cat__head .section-title {
  margin: 0;
  color: var(--c-text);
  font-size: var(--fs-h2);
  line-height: 1.2;
  letter-spacing: -.01em;
}
.page-faq .faq-cat__desc {
  margin: 10px 0 0;
  max-width: 66ch;
  color: var(--c-muted);
  font-size: var(--fs-small);
  line-height: 1.8;
}

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: 0 0 18px;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}
.page-faq .faq-figure .media-caption {
  padding: 10px 15px;
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: var(--fs-micro);
  line-height: 1.6;
}

.page-faq .faq-legends {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
}
.page-faq .faq-legend {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 14px;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  color: var(--c-muted);
  font-size: var(--fs-small);
}
.page-faq .faq-legend .mono {
  font-size: 1.15rem;
  color: var(--c-text);
  letter-spacing: -.02em;
}
.page-faq .faq-legend--live {
  border-left: 2px solid var(--c-green);
}
.page-faq .faq-legend--live .mono {
  color: var(--c-green);
}
.page-faq .faq-legend--delay {
  border-left: 2px solid var(--c-amber);
}
.page-faq .faq-legend--delay .mono {
  color: var(--c-amber);
}

/* ---------- 手风琴 ---------- */
.page-faq .accordion {
  border-top: 1px solid var(--c-line);
}
.page-faq .accordion-item {
  border-bottom: 1px solid var(--c-line);
  background: var(--c-panel);
  transition: background var(--t-med), box-shadow var(--t-med);
}
.page-faq .accordion-item:hover {
  background: var(--c-panel-2);
}
.page-faq .accordion-item:has(.accordion-trigger[aria-expanded="true"]) {
  background: var(--c-panel-2);
  box-shadow: inset 2px 0 0 var(--c-purple);
}
.page-faq .accordion-item h3 {
  margin: 0;
}
.page-faq .accordion-trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px 14px;
  align-items: start;
  width: 100%;
  margin: 0;
  padding: 17px var(--faq-pad-x);
  background: none;
  border: 0;
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.65;
  text-align: left;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}
.page-faq .accordion-trigger:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
}
.page-faq .faq-num {
  padding-top: 3px;
  color: var(--c-purple);
  font-size: var(--fs-micro);
  letter-spacing: .05em;
  white-space: nowrap;
}
.page-faq .accordion-trigger[aria-expanded="true"] .faq-num {
  color: var(--c-orange);
}
.page-faq .faq-mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 6px;
  flex: none;
}
.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
  transition: transform var(--t-med), opacity var(--t-med), background var(--t-med);
}
.page-faq .faq-mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}
.page-faq .faq-mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}
.page-faq .accordion-trigger[aria-expanded="true"] .faq-mark::after {
  transform: scaleY(0);
}
.page-faq .accordion-trigger[aria-expanded="true"] .faq-mark::before {
  background: var(--c-orange);
}

.page-faq .accordion-panel {
  margin: 0 var(--faq-pad-x) 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--c-line);
  color: var(--c-muted);
  font-size: var(--fs-small);
  line-height: 1.85;
}
.page-faq .accordion-panel p {
  margin: 0;
}
.page-faq .accordion-panel p + p {
  margin-top: 10px;
}
.page-faq .accordion-panel a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-glow);
  transition: color var(--t-fast), border-color var(--t-fast);
}
.page-faq .accordion-panel a:hover,
.page-faq .accordion-panel a:focus-visible {
  color: var(--c-text);
  border-bottom-color: var(--c-orange);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-cta {
  display: grid;
  gap: 16px;
  margin-top: 22px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--c-line);
  background:
    linear-gradient(135deg, rgba(139, 92, 246, .18) 0%, rgba(34, 211, 238, .08) 58%, transparent 100%),
    var(--c-panel);
}
.page-faq .faq-cta p {
  margin: 0;
  color: var(--c-muted);
  font-size: var(--fs-small);
  line-height: 1.8;
}
.page-faq .faq-cta strong {
  color: var(--c-text);
  font-weight: 600;
}
.page-faq .faq-cta .btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__visual::before {
    top: 24px;
    height: 58px;
  }
  .page-faq .accordion-panel {
    padding-left: 52px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    padding: clamp(44px, 6vw, 80px) 0 clamp(44px, 6vw, 72px);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(34px, 4vw, 64px);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
  }
  .page-faq .faq-cta .btn {
    justify-self: end;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-cat__head {
    padding-left: 38px;
  }
  .page-faq .accordion-trigger {
    gap: 10px 11px;
  }
  .page-faq .faq-index__list a {
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion-item,
  .page-faq .accordion-trigger,
  .page-faq .faq-mark::before,
  .page-faq .faq-mark::after,
  .page-faq .faq-index__list a,
  .page-faq .faq-cat__num {
    transition: none;
  }
}