.page-faq {
  --faq-line: rgba(16, 32, 31, .14);
  --faq-line-dark: rgba(232, 220, 192, .18);
  --faq-body: rgba(16, 32, 31, .82);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background:
    radial-gradient(120% 92% at 86% -10%, rgba(185, 242, 39, .16), transparent 58%),
    radial-gradient(90% 70% at 4% 100%, rgba(20, 102, 107, .55), transparent 62%),
    linear-gradient(180deg, var(--night) 0%, var(--deep) 100%);
  color: var(--sand);
  padding: 26px 0 52px;
  border-bottom: 3px solid var(--lime);
}

.page-faq .faq-hero .breadcrumb {
  color: var(--mist);
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--celadon);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.page-faq .faq-hero .breadcrumb a:hover {
  color: var(--lime);
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: 30px;
  align-items: center;
  margin-top: 26px;
}

.page-faq .faq-hero__text {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.6vw, 50px);
  line-height: 1.14;
  letter-spacing: -.02em;
  margin: 16px 0 0;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(232, 220, 192, .84);
}

.page-faq .faq-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--faq-line-dark);
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 9px;
}

.page-faq .faq-hero__facts .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 30px);
  letter-spacing: -.01em;
  color: var(--lime);
}

.page-faq .faq-hero__facts em {
  font-style: normal;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding: 44px 0 76px;
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
  align-self: start;
}

.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 12px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--faq-line);
}

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

.page-faq .faq-index__link {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 9px 8px 9px 14px;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  transition: color .18s var(--ease);
}

.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 50%;
  width: 18px;
  height: 3px;
  background: var(--lime);
  transform: translateY(-50%) scaleX(0);
  transform-origin: left center;
  transition: transform .2s var(--ease);
}

.page-faq .faq-index__link:hover::before,
.page-faq .faq-index__link:focus-visible::before {
  transform: translateY(-50%) scaleX(1);
}

.page-faq .faq-index__link:hover {
  color: var(--steel);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-faq .faq-index__label {
  min-width: 0;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  padding: 0 7px;
  border-radius: 999px;
  background: var(--celadon);
  color: var(--steel);
  opacity: 0;
  transition: opacity .18s var(--ease);
}

.page-faq .faq-index__item:hover .faq-index__count,
.page-faq .faq-index__link:focus-visible .faq-index__count {
  opacity: 1;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  border-top: 1px solid var(--faq-line);
  padding: 26px 0 10px;
  scroll-margin-top: 96px;
}

.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-group__head {
  display: grid;
  gap: 8px;
  margin-bottom: 6px;
}

.page-faq .faq-group__num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--flame);
}

.page-faq .faq-group__num::after {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--lime);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 28px);
  letter-spacing: -.01em;
  line-height: 1.3;
  margin: 0;
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
}

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

.page-faq .faq-q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 16px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--ink);
  transition: color .18s var(--ease);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible {
  color: var(--steel);
}

.page-faq .faq-q::after {
  content: "";
  width: 11px;
  height: 11px;
  margin-top: 7px;
  border-right: 2px solid var(--steel);
  border-bottom: 2px solid var(--steel);
  transform: rotate(45deg);
  transition: transform .22s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-item[open] .faq-q::after {
  transform: rotate(-135deg);
  margin-top: 11px;
  border-color: var(--flame);
}

.page-faq .faq-a {
  padding: 0 2px 20px;
}

.page-faq .faq-item[open] .faq-a {
  animation: faq-open .22s var(--ease) both;
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-body);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-figure {
  margin: 22px 0 4px;
  border-radius: var(--radius-m);
  overflow: hidden;
}

/* ---------- 结尾提示 ---------- */
.page-faq .faq-tail {
  display: grid;
  gap: 14px;
  margin-top: 38px;
  padding: 26px 24px;
  border-radius: var(--radius-l);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(185, 242, 39, .14), transparent 60%),
    linear-gradient(140deg, var(--night), var(--deep));
  color: var(--sand);
}

.page-faq .faq-tail__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.8vw, 24px);
  letter-spacing: -.01em;
  margin: 0;
  color: var(--paper);
}

.page-faq .faq-tail p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(232, 220, 192, .82);
}

.page-faq .faq-tail__actions {
  display: grid;
  gap: 16px;
  justify-items: start;
}

.page-faq .faq-tail__links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0;
  padding: 0;
}

.page-faq .faq-tail__links a {
  font-size: 14px;
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid rgba(203, 231, 222, .34);
  padding-bottom: 2px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-tail__links a:hover,
.page-faq .faq-tail__links a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 899px) {
  .page-faq .faq-index__list {
    display: flex;
    gap: 8px;
    border-left: 0;
    overflow-x: auto;
    padding: 2px 2px 10px;
    scrollbar-width: thin;
  }

  .page-faq .faq-index__item {
    flex: 0 0 auto;
  }

  .page-faq .faq-index__link {
    grid-template-columns: auto auto auto;
    border: 1px solid var(--faq-line);
    border-radius: 999px;
    padding: 7px 14px;
    background: #fff;
    font-size: 14px;
  }

  .page-faq .faq-index__link::before {
    display: none;
  }

  .page-faq .faq-index__count {
    opacity: 1;
  }

  .page-faq .faq-hero {
    padding: 20px 0 42px;
  }
}

/* ---------- 宽屏栅格 ---------- */
@media (min-width: 860px) {
  .page-faq .faq-hero {
    padding: 34px 0 62px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 52px;
    margin-top: 34px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(206px, 3fr) minmax(0, 7fr);
    gap: 60px;
    padding: 62px 0 96px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-group {
    padding: 32px 0 12px;
  }

  .page-faq .faq-tail {
    padding: 32px 34px;
  }

  .page-faq .faq-tail__actions {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-a {
    animation: none;
  }

  .page-faq .faq-index__link::before,
  .page-faq .faq-q::after {
    transition: none;
  }
}