.page-faq {
  --faq-index-w: 264px;
  --faq-item-pad: 16px;
  display: block;
  background-color: var(--abyss);
  color: var(--text);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(40px, 7vw, 76px) 0 clamp(24px, 4vw, 36px);
  background-image:
    radial-gradient(110% 80% at 88% -20%, rgba(61, 240, 208, 0.16), transparent 60%),
    radial-gradient(80% 70% at -10% 8%, rgba(255, 162, 75, 0.1), transparent 62%);
  background-repeat: no-repeat;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--mint);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--text);
}

.page-faq .faq-hero__frame {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background-image: linear-gradient(155deg, rgba(11, 44, 59, 0.94), rgba(6, 23, 38, 0.6) 58%, rgba(27, 22, 56, 0.62));
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(30, 60, 82, 0.9) 0 1px, transparent 1px 72px);
  opacity: 0.5;
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background-image: repeating-linear-gradient(90deg, var(--cyan) 0 2px, transparent 2px 20px);
  opacity: 0.5;
}

.page-faq .faq-hero__frame > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero .display-title {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(31px, 5.6vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-faq .faq-hero .lede {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-statbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-statbar li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background-color: rgba(6, 23, 38, 0.62);
}

.page-faq .faq-statbar__num {
  font-size: 17px;
  font-weight: 600;
  color: var(--amber);
}

.page-faq .faq-statbar__label {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: clamp(28px, 5vw, 44px) 0 clamp(64px, 9vw, 118px);
}

@media (min-width: 920px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 56px;
  }
}

/* ---------- 侧边索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background-color: rgba(11, 44, 59, 0.55);
  padding: 20px 18px;
}

@media (min-width: 920px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--head-h) + 26px);
    background-color: rgba(11, 44, 59, 0.42);
  }
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  padding-left: 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px 9px 14px;
  border-left: 2px solid var(--line);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--mint);
  border-left-color: var(--cyan);
  background-color: rgba(61, 240, 208, 0.08);
  outline: none;
}

.page-faq .faq-index__num {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

/* ---------- 内容列 ---------- */
.page-faq .faq-content {
  display: grid;
  gap: clamp(22px, 3.5vw, 34px);
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  padding: clamp(20px, 3.6vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background-color: var(--teal);
  scroll-margin-top: calc(var(--head-h) + 26px);
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .faq-group--indigo {
  background-color: var(--indigo);
}

.page-faq .faq-group--wine {
  background-color: var(--wine);
}

.page-faq .faq-group:target {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(61, 240, 208, 0.35), 0 22px 54px -32px rgba(61, 240, 208, 0.7);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  margin: 0;
  font-size: clamp(30px, 5vw, 40px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
  opacity: 0.85;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 25px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  max-width: 48ch;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 8px;
  margin-top: 18px;
}

.page-faq .faq-item {
  border: 1px solid rgba(30, 60, 82, 0.92);
  border-radius: var(--r-sm);
  background-color: rgba(6, 23, 38, 0.46);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(61, 240, 208, 0.4);
}

.page-faq .faq-item[open] {
  border-color: rgba(61, 240, 208, 0.52);
  background-color: rgba(6, 23, 38, 0.74);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: var(--faq-item-pad);
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.7vw, 16.5px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--r-sm);
}

.page-faq .faq-item__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-top: 1px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--cyan);
  font-size: 15px;
  line-height: 1;
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .faq-item__mark::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(135deg);
  border-color: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 0 var(--faq-item-pad) 16px 52px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-item__a p + p {
  margin-top: 8px;
}

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

.page-faq .faq-item__a a:hover {
  color: var(--mint);
}

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 4px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 提示条 ---------- */
.page-faq .faq-callout {
  padding: 16px 18px;
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background-color: rgba(255, 162, 75, 0.1);
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-faq .faq-callout p {
  margin: 0;
}

.page-faq .faq-callout a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-faq .faq-group .faq-callout {
  margin-top: 20px;
}

/* ---------- 回到顶部 ---------- */
.page-faq .faq-top {
  position: fixed;
  right: max(16px, env(safe-area-inset-right, 0px));
  bottom: 20px;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 1px solid rgba(61, 240, 208, 0.45);
  border-radius: var(--r-pill);
  background-color: rgba(6, 23, 38, 0.92);
  color: var(--mint);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  backdrop-filter: blur(10px);
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-faq .faq-top:hover,
.page-faq .faq-top:focus-visible {
  background-color: rgba(11, 44, 59, 0.98);
  border-color: var(--cyan);
  color: var(--text);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 559px) {
  .page-faq {
    --faq-item-pad: 14px;
  }

  .page-faq .faq-item__a {
    padding-left: 14px;
  }

  .page-faq .faq-group__head {
    gap: 12px;
  }

  .page-faq .faq-group__num {
    font-size: 28px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero .display-title {
    max-width: 24ch;
  }

  .page-faq .faq-group__note {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-faq .faq-item[open] .faq-item__mark {
    transform: none;
  }
}