.page-faq {
  --faq-rule: rgba(10, 31, 60, 0.14);
  --faq-rule-strong: rgba(10, 31, 60, 0.3);
  --faq-ink-soft: rgba(10, 31, 60, 0.78);
  --faq-on-dark: rgba(244, 241, 234, 0.78);
  background: var(--ly-paper);
  color: var(--ly-deep);
  overflow-x: hidden;
}

/* ===== 首屏 ===== */
.page-faq .faq-masthead {
  position: relative;
  background: var(--ly-deep);
  color: var(--ly-paper);
  padding: 24px 0 clamp(48px, 7vw, 96px);
  overflow: hidden;
}

.page-faq .faq-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(33, 230, 193, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(33, 230, 193, 0.07) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-masthead::after {
  content: "";
  position: absolute;
  top: -180px;
  right: -140px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255, 107, 74, 0.3), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-breadcrumb,
.page-faq .faq-masthead__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-breadcrumb .ly-breadcrumb__link {
  color: var(--ly-steel);
}

.page-faq .faq-breadcrumb .ly-breadcrumb__link:hover {
  color: var(--ly-cyan);
}

.page-faq .faq-masthead__inner {
  margin-top: clamp(28px, 5vw, 56px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.page-faq .faq-eyebrow {
  margin: 0 0 16px;
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ly-cyan);
}

.page-faq .faq-title {
  margin: 0 0 22px;
  font-size: var(--ly-fs-36);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ly-paper);
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 48ch;
  color: var(--faq-on-dark);
  font-size: var(--ly-fs-17);
  line-height: 1.85;
}

.page-faq .faq-masthead__figure {
  margin: 0;
}

.page-faq .faq-masthead__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--ly-radius-card);
  border: 1px solid rgba(33, 230, 193, 0.32);
  object-fit: cover;
}

/* ===== 主体两栏 ===== */
.page-faq .faq-body {
  background: var(--ly-paper);
  padding: clamp(40px, 6vw, 88px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

/* 左侧索引 */
.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-12);
  letter-spacing: 0.14em;
  color: var(--ly-steel);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--faq-rule-strong);
  border-radius: var(--ly-radius-pill);
  color: var(--ly-deep);
  font-size: var(--ly-fs-15);
  text-decoration: none;
  transition: color 120ms ease, border-color 120ms ease, background-color 120ms ease;
}

.page-faq .faq-index__link:hover {
  color: var(--ly-deep);
  border-color: var(--ly-cyan);
  background: rgba(33, 230, 193, 0.14);
}

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

.page-faq .faq-index__num {
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-12);
  color: var(--ly-steel);
}

.page-faq .faq-index__note {
  margin: 18px 0 0;
  font-size: var(--ly-fs-12);
  line-height: 1.7;
  color: var(--ly-steel);
  max-width: 34ch;
}

/* 右侧问答 */
.page-faq .faq-group {
  margin: 0 0 56px;
  scroll-margin-top: calc(var(--ly-header-h) + 24px);
}

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

.page-faq .faq-group__head {
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ly-deep);
  margin-bottom: 8px;
  transition: border-color 120ms ease;
}

.page-faq .faq-group:target .faq-group__head {
  border-bottom-color: var(--ly-cyan);
}

.page-faq .faq-group__titlebar {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-faq .faq-group__num {
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-12);
  letter-spacing: 0.1em;
  color: var(--ly-coral);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: var(--ly-fs-28);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ly-deep);
}

.page-faq .faq-group__desc {
  margin: 10px 0 0;
  font-size: var(--ly-fs-15);
  line-height: 1.7;
  color: var(--ly-steel);
  max-width: 52ch;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 4px 20px 18px;
  cursor: pointer;
  list-style: none;
  font-size: var(--ly-fs-21);
  font-weight: 600;
  line-height: 1.5;
  color: var(--ly-deep);
  transition: color 120ms ease;
}

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

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: transparent;
  transition: background-color 120ms ease;
}

.page-faq .faq-item[open] > .faq-item__q::before {
  background: var(--ly-cyan);
}

.page-faq .faq-item__q::after {
  content: "+";
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-21);
  line-height: 1;
  color: var(--ly-steel);
  transition: color 120ms ease;
}

.page-faq .faq-item[open] > .faq-item__q::after {
  content: "–";
  color: var(--ly-coral);
}

.page-faq .faq-item__q:hover {
  color: var(--ly-blue);
}

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

.page-faq .faq-item__index {
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-12);
  color: var(--ly-steel);
  flex: none;
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
}

.page-faq .faq-item__a {
  padding: 0 4px 24px 18px;
  max-width: 56ch;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: var(--ly-fs-17);
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-num {
  font-family: var(--ly-font-mono);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ly-blue);
}

.page-faq .faq-figure {
  margin: 28px 0 0;
}

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

.page-faq .faq-figure .ly-media__caption {
  margin-top: 12px;
  font-size: var(--ly-fs-12);
  line-height: 1.7;
  color: var(--ly-steel);
}

/* ===== 联系区 ===== */
.page-faq .faq-contact {
  position: relative;
  background: var(--ly-ink);
  color: var(--ly-paper);
  padding: clamp(48px, 7vw, 96px) 0;
  overflow: hidden;
}

.page-faq .faq-contact::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -140px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(255, 107, 74, 0.26), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-contact__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-faq .faq-contact__title {
  margin: 0 0 18px;
  font-size: var(--ly-fs-36);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ly-paper);
}

.page-faq .faq-contact__lead {
  margin: 0 0 28px;
  max-width: 48ch;
  font-size: var(--ly-fs-17);
  line-height: 1.85;
  color: var(--faq-on-dark);
}

.page-faq .faq-contact__item {
  padding: 16px 0;
  border-top: 1px solid rgba(244, 241, 234, 0.16);
}

.page-faq .faq-contact__item:last-child {
  border-bottom: 1px solid rgba(244, 241, 234, 0.16);
}

.page-faq .faq-contact__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--ly-font-mono);
  font-size: var(--ly-fs-12);
  letter-spacing: 0.12em;
  color: var(--ly-steel);
}

.page-faq .faq-contact__value {
  font-size: var(--ly-fs-17);
  line-height: 1.7;
  color: var(--ly-paper);
  word-break: break-word;
}

/* ===== 响应式 ===== */
@media (min-width: 780px) {
  .page-faq .faq-title {
    font-size: var(--ly-fs-76);
  }

  .page-faq .faq-group__title {
    font-size: var(--ly-fs-36);
  }

  .page-faq .faq-contact__title {
    font-size: var(--ly-fs-52);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-masthead__inner {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
  }

  .page-faq .faq-shell {
    grid-template-columns: 3fr 7fr;
    gap: 56px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--ly-header-h) + 32px);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-index__link {
    display: flex;
    padding: 12px 14px;
    border: 0;
    border-left: 2px solid var(--faq-rule);
    border-radius: 0;
  }

  .page-faq .faq-index__link:hover {
    border-left-color: var(--ly-cyan);
    background: rgba(33, 230, 193, 0.1);
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: 6fr 6fr;
    gap: 64px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item__q,
  .page-faq .faq-group__head {
    transition: none;
  }
}