.page-faq {
  --faq-side-w: 232px;
  --faq-card-gap: 12px;
  padding-bottom: clamp(48px, 7vw, 88px);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 54px) 0 clamp(22px, 3.5vw, 38px);
  border-bottom: 1px solid var(--c-line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -46%;
  right: -14%;
  width: min(600px, 68%);
  height: 300px;
  background: radial-gradient(closest-side, rgba(0, 229, 208, 0.16), rgba(0, 229, 208, 0));
  pointer-events: none;
}

.page-faq .breadcrumb {
  position: relative;
  margin-bottom: clamp(16px, 2.6vw, 26px);
}

.page-faq .faq-hero .eyebrow {
  position: relative;
}

.page-faq .faq-hero__title {
  position: relative;
  margin: 10px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(27px, 5.2vw, 52px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--c-ink);
}

.page-faq .faq-hero__lede {
  position: relative;
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--c-mute);
}

/* ---------- 分栏骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 38px);
  padding-top: clamp(24px, 4vw, 46px);
}

.page-faq .faq-side,
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-side__cap {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-mute);
}

.page-faq .faq-side__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-side__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  color: var(--c-ink);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-side__item:hover,
.page-faq .faq-side__item:focus-visible {
  border-color: var(--c-cyan);
  background: var(--c-panel-hi);
  color: var(--c-cyan-soft);
}

.page-faq .faq-side__num {
  font-size: 11.5px;
  color: var(--c-cyan);
}

.page-faq .faq-side__count {
  font-size: 11.5px;
  color: var(--c-mute);
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-faq .faq-side {
    position: sticky;
    top: 112px;
    align-self: start;
  }

  .page-faq .faq-side__nav {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-side__item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 10px;
    width: 100%;
    padding: 13px 12px 13px 14px;
    border: 0;
    border-top: 1px solid var(--c-line);
    border-left: 2px solid transparent;
    background: transparent;
    white-space: normal;
  }

  .page-faq .faq-side__item:last-child {
    border-bottom: 1px solid var(--c-line);
  }

  .page-faq .faq-side__item:hover,
  .page-faq .faq-side__item:focus-visible {
    border-left-color: var(--c-cyan);
    background: var(--c-panel);
    color: var(--c-ink);
  }
}

/* ---------- 分组 ---------- */

.page-faq .qa-group {
  scroll-margin-top: 118px;
}

.page-faq .qa-group + .qa-group {
  margin-top: clamp(34px, 5vw, 66px);
}

.page-faq .qa-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .qa-group__num {
  grid-row: 1 / span 2;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-faq .qa-group__title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--c-ink);
}

.page-faq .qa-group__intro {
  grid-column: 2;
  margin: 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mute);
}

/* ---------- 问答卡片 ---------- */

.page-faq .qa-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-card-gap);
}

.page-faq .qa {
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .qa:hover,
.page-faq .qa:focus-within {
  border-color: var(--c-cyan);
  background: var(--c-panel-hi);
}

.page-faq .qa[open] {
  background: var(--c-panel-hi);
  box-shadow: inset 2px 0 0 var(--c-cyan);
}

.page-faq .qa__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 15px 16px 15px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__idx {
  padding-top: 2px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
  transition: color 0.2s var(--ease);
}

.page-faq .qa[open] .qa__idx {
  color: var(--c-flame);
}

.page-faq .qa__q {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-faq .qa__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  flex: none;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--c-flame);
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
}

.page-faq .qa__body {
  padding: 0 16px 17px;
}

.page-faq .qa[open] .qa__body {
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
}

.page-faq .qa__body p {
  margin: 0;
  max-width: 48ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-mute);
}

.page-faq .qa__body a {
  color: var(--c-cyan);
  text-decoration-color: rgba(0, 229, 208, 0.4);
  text-underline-offset: 3px;
}

.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  color: var(--c-cyan-soft);
  text-decoration-color: var(--c-cyan-soft);
}

/* ---------- 图 ---------- */

.page-faq .qa-visual {
  margin: 0;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  overflow: hidden;
}

.page-faq .qa-visual__frame {
  position: relative;
  aspect-ratio: 12 / 7;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(0, 229, 208, 0.12), rgba(5, 11, 28, 0) 62%),
    var(--c-panel-hi);
}

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

.page-faq .qa-visual .media__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--c-mute);
}

@media (min-width: 720px) {
  .page-faq .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-faq .qa-grid > .qa-visual {
    grid-column: 1 / -1;
  }
}

/* ---------- 底部 ---------- */

.page-faq .faq-cta {
  display: grid;
  gap: 20px;
  margin-top: clamp(44px, 7vw, 88px);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--c-line);
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(255, 90, 43, 0.18), rgba(255, 90, 43, 0) 58%),
    var(--c-panel);
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--c-ink);
}

.page-faq .faq-cta__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-mute);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 780px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1.5fr) auto;
    align-items: center;
    gap: 32px;
  }

  .page-faq .faq-cta__actions {
    flex-wrap: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .qa__idx,
  .page-faq .faq-side__item {
    transition: none;
  }
}