.page-faq {
  background:
    radial-gradient(120% 55% at 84% 0%, rgba(216, 242, 74, 0.07), transparent 62%),
    radial-gradient(80% 45% at 6% 38%, rgba(255, 106, 43, 0.05), transparent 70%),
    linear-gradient(180deg, var(--bo-ink) 0%, var(--bo-coal) 46%, var(--bo-coal) 100%);
  color: var(--bo-white);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

.page-faq .bo-breadcrumb {
  padding: clamp(20px, 3vw, 32px) 0 0;
}

/* 首屏 */
.page-faq .fa-hero {
  padding: clamp(24px, 5vw, 56px) 0 clamp(28px, 4vw, 44px);
  border-bottom: 1px solid var(--bo-line);
}

.page-faq .fa-hero .bo-title {
  margin: 10px 0 0;
}

.page-faq .fa-hero .bo-lede {
  max-width: 62ch;
  margin-top: 18px;
  color: var(--bo-white);
  opacity: 0.84;
}

.page-faq .fa-meta {
  display: grid;
  gap: 18px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 720px) {
  .page-faq .fa-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .page-faq .fa-meta__item + .fa-meta__item {
    border-left: 1px solid var(--bo-line);
    padding-left: 22px;
  }
  .page-faq .fa-meta__item:not(:last-child) {
    padding-right: 22px;
  }
}

.page-faq .fa-meta__figure {
  margin: 0;
  font-family: var(--bo-font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1.1;
  color: var(--bo-orange);
}

.page-faq .fa-meta__label {
  margin: 8px 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--bo-muted);
}

/* 主体布局：移动端单列，桌面端左问答右目录 */
.page-faq .fa-layout {
  display: grid;
  gap: 36px;
  margin-top: clamp(28px, 4vw, 48px);
}

@media (min-width: 980px) {
  .page-faq .fa-layout {
    grid-template-columns: minmax(0, 7fr) minmax(210px, 3fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
  .page-faq .fa-main {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }
  .page-faq .fa-aside {
    grid-column: 2;
    grid-row: 1;
    min-width: 0;
  }
}

.page-faq .fa-figure {
  margin: 0 0 clamp(32px, 5vw, 52px);
}

.page-faq .fa-figure .bo-figure__img,
.page-faq .fa-slow__fig .bo-figure__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 分组 */
.page-faq .fa-group {
  padding-top: clamp(30px, 5vw, 52px);
  margin-top: clamp(30px, 5vw, 52px);
  border-top: 1px solid var(--bo-line);
}

.page-faq .fa-group:first-of-type {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.page-faq .fa-group__title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-family: var(--bo-font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  font-size: clamp(1.25rem, 3.4vw, 1.625rem);
  line-height: 1.3;
  color: var(--bo-white);
}

.page-faq .fa-group__num {
  flex: none;
  font-size: 0.8125rem;
  color: var(--bo-lime);
  letter-spacing: 0.06em;
}

/* 问答卡片 */
.page-faq .fa-q {
  position: relative;
  border: 1px solid var(--bo-line);
  background: rgba(18, 53, 43, 0.34);
  margin-bottom: 12px;
  transition: background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-faq .fa-q:hover {
  border-color: rgba(154, 170, 162, 0.6);
}

.page-faq .fa-q[open] {
  background: rgba(18, 53, 43, 0.6);
  border-color: rgba(216, 242, 74, 0.34);
  box-shadow: 5px 5px 0 rgba(239, 231, 214, 0.14);
}

.page-faq .fa-q > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--bo-font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(1rem, 2.4vw, 1.0625rem);
  line-height: 1.5;
  color: var(--bo-white);
}

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

.page-faq .fa-q > summary::after {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin: 7px 2px 0 auto;
  border-right: 2px solid var(--bo-orange);
  border-bottom: 2px solid var(--bo-orange);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.page-faq .fa-q[open] > summary::after {
  transform: rotate(-135deg);
}

.page-faq .fa-q__idx {
  flex: none;
  padding-top: 2px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--bo-muted);
}

.page-faq .fa-q[open] .fa-q__idx {
  color: var(--bo-orange);
}

.page-faq .fa-q__body {
  padding: 0 18px 20px;
  border-top: 1px solid var(--bo-line);
}

@media (min-width: 720px) {
  .page-faq .fa-q > summary {
    padding: 18px 24px;
  }
  .page-faq .fa-q__body {
    padding: 0 24px 24px;
  }
}

.page-faq .fa-q__conclusion {
  margin: 20px 0 16px;
  font-family: var(--bo-font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.1875rem, 3.2vw, 1.625rem);
  line-height: 1.3;
  color: var(--bo-lime);
}

.page-faq .fa-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: fa-step;
}

.page-faq .fa-steps > li {
  position: relative;
  counter-increment: fa-step;
  padding-left: 36px;
  margin-bottom: 10px;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--bo-white);
  opacity: 0.88;
}

.page-faq .fa-steps > li:last-child {
  margin-bottom: 0;
}

.page-faq .fa-steps > li::before {
  content: counter(fa-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--bo-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--bo-orange);
}

.page-faq .fa-steps a {
  color: var(--bo-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 加载排查区：问答配图 */
.page-faq .fa-slow {
  display: grid;
  gap: 24px;
}

@media (min-width: 760px) {
  .page-faq .fa-slow {
    grid-template-columns: minmax(0, 1fr) minmax(200px, 260px);
    gap: 28px;
    align-items: start;
  }
}

.page-faq .fa-slow__fig {
  margin: 0;
}

/* 右侧粘性目录 */
.page-faq .fa-toc {
  border-top: 1px solid var(--bo-line);
  padding-top: 20px;
}

@media (min-width: 980px) {
  .page-faq .fa-aside {
    position: sticky;
    top: calc(var(--bo-topbar-h) + 28px);
  }
  .page-faq .fa-toc {
    border-top: 0;
    padding-top: 0;
  }
}

.page-faq .fa-toc__title {
  margin: 0 0 14px;
  font-family: var(--bo-font-display);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bo-muted);
}

.page-faq .fa-toc__list {
  margin: 0;
  padding: 0 0 0 16px;
  list-style: none;
  border-left: 1px solid var(--bo-line);
}

.page-faq .fa-toc__list li {
  margin-bottom: 12px;
}

.page-faq .fa-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--bo-white);
  opacity: 0.8;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.page-faq .fa-toc__list a:hover,
.page-faq .fa-toc__list a:focus-visible {
  color: var(--bo-lime);
  opacity: 1;
}

.page-faq .fa-toc__num {
  flex: none;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--bo-orange);
}

.page-faq .fa-toc__note {
  margin-top: 24px;
  padding: 18px 16px;
  border: 1px solid var(--bo-line);
  background: rgba(14, 20, 18, 0.55);
}

.page-faq .fa-toc__note p {
  margin: 0 0 14px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--bo-muted);
}

.page-faq .fa-toc__note .bo-btn {
  width: 100%;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fa-q,
  .page-faq .fa-q > summary::after,
  .page-faq .fa-toc__list a {
    transition: none;
  }
}