.page-faq {
  --faq-line: rgba(167, 198, 221, .42);
  --faq-line-soft: rgba(167, 198, 221, .22);
  --faq-wash: rgba(44, 106, 151, .07);
  --faq-wash-deep: rgba(44, 106, 151, .05);
  --faq-side-w: 236px;
  color: var(--ink);
  padding-bottom: 0;
}

/* ---------- 面包屑 ---------- */

.page-faq .breadcrumb {
  padding-block: 18px 0;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--snowline);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--rime);
}

.page-faq .breadcrumb a {
  color: var(--snowline);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  margin-top: 20px;
  color: var(--snow);
  background:
    radial-gradient(120% 90% at 88% 12%, rgba(111, 211, 232, .16) 0%, rgba(111, 211, 232, 0) 58%),
    linear-gradient(158deg, var(--night) 0%, var(--ice) 58%, #12405f 100%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, rgba(167, 198, 221, .10) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(167, 198, 221, .055) 0 1px, transparent 1px 88px);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(48px, 7vw, 104px) clamp(40px, 5.5vw, 80px);
}

.page-faq .faq-hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-faq .faq-hero-title {
  margin: 18px 0 0;
  max-width: 17ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(33px, 5.2vw, 74px);
  line-height: 1.07;
  letter-spacing: -.015em;
}

.page-faq .faq-hero-lede {
  max-width: 58ch;
  margin: 26px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: rgba(245, 249, 252, .78);
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 52px;
  margin: 42px 0 0;
  padding-top: 24px;
  border-top: 1px solid rgba(167, 198, 221, .24);
}

.page-faq .faq-hero-meta > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-hero-meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(167, 198, 221, .88);
}

.page-faq .faq-hero-meta dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--snow);
}

/* ---------- 主布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-block: clamp(48px, 6vw, 88px) clamp(56px, 7vw, 104px);
}

/* ---------- 左侧分组 ---------- */

.page-faq .faq-side-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--snowline);
  margin: 0 0 14px;
}

.page-faq .faq-side-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-side-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  padding: 9px 15px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.3;
  color: var(--ice);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease),
              background-color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-side-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--snowline);
  transition: color .18s var(--ease);
}

.page-faq .faq-side-link:hover,
.page-faq .faq-side-link:focus-visible {
  border-color: var(--cyan);
  background: rgba(111, 211, 232, .14);
  color: var(--night);
  transform: translateX(4px);
}

.page-faq .faq-side-link:hover .faq-side-idx,
.page-faq .faq-side-link:focus-visible .faq-side-idx {
  color: var(--orange);
}

.page-faq .faq-side-figure {
  margin: 26px 0 0;
  max-height: 300px;
  border-radius: 3px;
  overflow: hidden;
}

.page-faq .faq-side-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: 28px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(52px, 6vw, 88px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 16px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group-idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--snowline);
  flex: 0 0 auto;
}

.page-faq .faq-group-head .title-md {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 2.4vw, 30px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--night);
}

/* ---------- 手风琴 ---------- */

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

.page-faq .qa:last-of-type {
  border-bottom-color: var(--faq-line);
}

.page-faq .qa-head {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 22px 4px 22px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.6;
  color: var(--night);
  transition: color .18s var(--ease);
}

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

.page-faq .qa-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 25px;
  width: 3px;
  height: 18px;
  background: transparent;
  transform: scaleY(.35);
  transform-origin: top center;
  transition: background-color .2s var(--ease), transform .2s var(--ease);
}

.page-faq .qa[open] > .qa-head::before {
  background: var(--orange);
  transform: scaleY(1);
}

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

.page-faq .qa-head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .qa-title {
  flex: 1 1 auto;
}

.page-faq .qa-arrow {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 9px;
  border-right: 2px solid var(--snowline);
  border-bottom: 2px solid var(--snowline);
  transform: rotate(45deg);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .qa[open] > .qa-head .qa-arrow {
  transform: rotate(-45deg);
  border-color: var(--orange);
}

.page-faq .qa-body {
  padding: 6px 20px 26px 18px;
  background: linear-gradient(100deg, var(--faq-wash) 0%, var(--faq-wash-deep) 72%, transparent 100%);
  border-left: 3px solid rgba(111, 211, 232, .5);
}

.page-faq .qa-body p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(12, 20, 28, .82);
}

.page-faq .qa-body p + p {
  margin-top: 14px;
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: 1.05em;
  letter-spacing: .02em;
  color: var(--snowline);
}

.page-faq .qa-template {
  display: inline-block;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--night);
  background: rgba(255, 255, 255, .78);
  border: 1px dashed rgba(44, 106, 151, .45);
  border-radius: 3px;
}

/* ---------- 图 ---------- */

.page-faq .faq-figure {
  margin: 0 0 30px;
  max-width: 100%;
  border-radius: 3px;
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 相关问题胶囊 ---------- */

.page-faq .qa-related {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
}

.page-faq .qa-related-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--snowline);
  margin-right: 2px;
}

.page-faq .qa-pill {
  display: inline-block;
  padding: 7px 15px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.3;
  color: var(--ice);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease),
              background-color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .qa-pill:hover,
.page-faq .qa-pill:focus-visible {
  border-color: var(--cyan);
  background: rgba(111, 211, 232, .16);
  color: var(--night);
  transform: translateX(4px);
}

/* ---------- 底部联系 ---------- */

.page-faq .faq-cta {
  border-top: 1px solid rgba(167, 198, 221, .3);
  background:
    radial-gradient(90% 120% at 8% 0%, rgba(111, 211, 232, .14) 0%, rgba(111, 211, 232, 0) 62%),
    linear-gradient(180deg, var(--night) 0%, #0a2138 100%);
  color: var(--snow);
}

.page-faq .faq-cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-block: clamp(48px, 6vw, 88px);
}

.page-faq .faq-cta .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
  margin: 0;
}

.page-faq .faq-cta .title-lg {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.2vw, 44px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--snow);
}

.page-faq .faq-cta-text {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(245, 249, 252, .78);
  word-break: break-word;
}

.page-faq .faq-cta-note {
  margin: 12px 0 0;
  max-width: 60ch;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: .02em;
  color: rgba(167, 198, 221, .9);
}

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

.page-faq .faq-cta-actions .btn--ghost {
  border-color: rgba(167, 198, 221, .5);
  color: var(--snow);
}

.page-faq .faq-cta-actions .btn--ghost:hover,
.page-faq .faq-cta-actions .btn--ghost:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-figure {
    max-width: 300px;
    margin-left: auto;
    margin-right: 0;
  }

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

  .page-faq .faq-cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: clamp(44px, 5vw, 84px);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 28px;
    max-height: calc(100vh - 56px);
    overflow-y: auto;
    padding-right: 6px;
  }

  .page-faq .faq-side-nav {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--faq-line-soft);
  }

  .page-faq .faq-side-link {
    border: 0;
    border-radius: 0;
    padding: 9px 12px;
    background: transparent;
    white-space: normal;
    color: var(--ice);
  }

  .page-faq .faq-side-link:hover,
  .page-faq .faq-side-link:focus-visible {
    background: rgba(111, 211, 232, .12);
    transform: translateX(4px);
  }

  .page-faq .faq-side-figure {
    max-height: 340px;
  }

  .page-faq .qa-head {
    padding-right: 20px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-figure {
    max-width: 340px;
  }

  .page-faq .faq-group-head .title-md {
    font-size: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-head::before,
  .page-faq .qa-arrow,
  .page-faq .qa-pill,
  .page-faq .faq-side-link,
  .page-faq .breadcrumb a {
    transition-property: color, background-color, border-color, opacity;
    transition-duration: .18s;
  }

  .page-faq .qa-pill:hover,
  .page-faq .qa-pill:focus-visible,
  .page-faq .faq-side-link:hover,
  .page-faq .faq-side-link:focus-visible {
    transform: none;
  }

  .page-faq .qa-arrow,
  .page-faq .qa[open] > .qa-head .qa-arrow {
    transform: none;
  }
}