.page-faq {
  --faq-gutter: 42px;
  --faq-rail: 244px;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumb {
  padding-top: clamp(18px, 2.6vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 4.6vw, 60px) 0 clamp(26px, 3.6vw, 48px);
  background-image:
    radial-gradient(58% 56% at 86% 4%, rgba(34, 232, 208, 0.13), transparent 62%),
    radial-gradient(48% 52% at 2% 2%, rgba(255, 106, 30, 0.09), transparent 64%);
  background-repeat: no-repeat;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 52px);
}

.page-faq .faq-hero__lead .display {
  margin: 12px 0 0;
  max-width: 20ch;
}

.page-faq .faq-hero__lead .lede {
  margin-top: var(--sp-5);
  max-width: 60ch;
  color: var(--soft);
}

.page-faq .faq-hero__cta {
  margin: var(--sp-6) 0 0;
}

.page-faq .faq-hero__aside {
  align-self: end;
  padding: var(--sp-5);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background:
    linear-gradient(180deg, rgba(22, 32, 58, 0.9), rgba(11, 19, 36, 0.5));
  box-shadow: var(--shadow-paper);
}

.page-faq .faq-hero__aside-label {
  margin: 0 0 var(--sp-4);
  font-size: var(--fs-13);
  letter-spacing: var(--tracking-annot);
  color: var(--muted);
}

.page-faq .faq-hero__aside-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__aside-list a {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  color: var(--soft);
  font-size: var(--fs-16);
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.12s ease, transform 0.12s ease;
}

.page-faq .faq-hero__aside-list li:last-child a {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-hero__aside-list a::before {
  content: "";
  flex: 0 0 auto;
  width: 16px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-hero__aside-list a:hover,
.page-faq .faq-hero__aside-list a:focus-visible {
  color: var(--cyan);
  transform: translateX(4px);
}

/* ---------- 分类导航带 ---------- */
.page-faq .faq-cat {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .faq-cat__list {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin: 0;
  padding: var(--sp-4) 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-cat__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--soft);
  font-size: var(--fs-13);
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.12s ease, color 0.12s ease, background-color 0.12s ease;
}

.page-faq .faq-cat__item:hover,
.page-faq .faq-cat__item:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
  background: var(--cyan-08);
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding-top: clamp(38px, 5vw, 76px);
  padding-bottom: clamp(48px, 6vw, 96px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 64px);
}

.page-faq .faq-body__aside {
  display: none;
}

.page-faq .faq-body__aside-label {
  margin: 0 0 var(--sp-4);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-13);
  letter-spacing: var(--tracking-annot);
  color: var(--muted);
}

.page-faq .faq-body__aside-note {
  margin: var(--sp-6) 0 0;
  color: var(--muted);
  font-size: var(--fs-13);
  line-height: 1.8;
}

/* ---------- 区块 ---------- */
.page-faq .faq-sec {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(56px, 7vw, 104px);
}

.page-faq .faq-sec__head {
  margin-bottom: var(--sp-6);
}

.page-faq .faq-sec__index {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 5.4vw, 58px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  opacity: 0.85;
}

.page-faq .faq-sec__title {
  margin: 10px 0 0;
  font-size: clamp(23px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-sec__intro {
  margin: var(--sp-4) 0 0;
  max-width: 62ch;
  color: var(--soft);
  font-size: var(--fs-16);
  line-height: var(--lh-body);
}

.page-faq .faq-sec__figure {
  margin: 0 0 var(--sp-7);
}

.page-faq .faq-sec__figure .media-frame__cap {
  margin-top: var(--sp-3);
  color: var(--muted);
  font-size: var(--fs-13);
  letter-spacing: 0.02em;
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-acc {
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
  padding: clamp(17px, 2.4vw, 26px) 0;
  list-style: none;
  cursor: pointer;
  color: var(--white);
  font-size: clamp(17px, 1.6vw, 19px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -0.005em;
  transition: color 0.12s ease;
}

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

.page-faq .faq-item__q::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  padding-left: var(--sp-4);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--muted);
  transition: color 0.12s ease;
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
  color: var(--cyan);
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 4px;
  border-radius: var(--r-xs);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  min-width: 26px;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-13);
  letter-spacing: 0.04em;
  color: var(--muted);
  transition: color 0.12s ease;
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--cyan);
}

.page-faq .faq-item__a {
  position: relative;
  padding: 0 0 var(--sp-6) var(--faq-gutter);
  color: var(--soft);
  font-size: var(--fs-16);
  line-height: var(--lh-body);
}

.page-faq .faq-item__a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  bottom: var(--sp-6);
  width: 2px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--cyan), rgba(34, 232, 208, 0));
}

.page-faq .faq-item__a > * + * {
  margin-top: var(--sp-4);
}

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

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

/* ---------- 步骤清单 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: start;
}

.page-faq .faq-steps__num {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: var(--r-pill);
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--fs-12);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-faq .faq-steps__text {
  color: var(--soft);
  font-size: var(--fs-16);
  line-height: 1.75;
}

.page-faq .faq-steps__copy {
  margin-top: var(--sp-2);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-help {
  padding: 0 0 clamp(56px, 7vw, 110px);
}

.page-faq .faq-help__card {
  position: relative;
  padding: clamp(26px, 3.4vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(135deg, rgba(22, 32, 58, 0.95), rgba(5, 7, 14, 0.9)),
    linear-gradient(90deg, rgba(255, 106, 30, 0.14), rgba(34, 232, 208, 0.1));
  background-blend-mode: normal;
  box-shadow: var(--shadow-paper);
  overflow: hidden;
}

.page-faq .faq-help__card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
}

.page-faq .faq-help__index {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-24);
  color: var(--orange);
  letter-spacing: 0.02em;
}

.page-faq .faq-help__title {
  margin: var(--sp-3) 0 0;
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-help__text {
  margin: var(--sp-4) 0 0;
  max-width: 66ch;
  color: var(--soft);
  font-size: var(--fs-16);
  line-height: var(--lh-body);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 0;
  margin: var(--sp-6) 0 0;
  padding: 0;
  list-style: none;
  max-width: 620px;
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__list li:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__k {
  flex: 0 0 auto;
  min-width: 84px;
  color: var(--muted);
  font-size: var(--fs-13);
  letter-spacing: var(--tracking-annot);
}

.page-faq .faq-help__v {
  color: var(--white);
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin: var(--sp-7) 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq {
    --faq-gutter: 48px;
  }

  .page-faq .faq-cat__list {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(32px, 4vw, 72px);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-body__aside {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__aside-list a,
  .page-faq .faq-cat__item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__num {
    transition: none;
  }

  .page-faq .faq-hero__aside-list a:hover,
  .page-faq .faq-hero__aside-list a:focus-visible {
    transform: none;
  }
}