.page-faq {
  --faq-rail: 232px;
  --faq-line: rgba(34, 55, 107, 0.16);
  --faq-line-soft: rgba(233, 237, 245, 0.16);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-faq .breadcrumb {
  padding: 18px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--jade-deep);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  margin-top: 14px;
  padding: 40px 0 48px;
  background: linear-gradient(150deg, var(--ink-900) 0%, var(--indigo-800) 58%, var(--indigo-600) 100%);
  color: var(--paper);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(120deg, rgba(233, 237, 245, 0.06) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--jade);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: clamp(1.85rem, 4.6vw, 3.35rem);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  color: rgba(247, 249, 252, 0.82);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 28px 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-stat-num {
  font-size: 26px;
  font-weight: 500;
  line-height: 1.1;
  color: var(--gold);
}

.page-faq .faq-stat-label {
  font-size: 13px;
  color: rgba(233, 237, 245, 0.7);
}

.page-faq .faq-jump {
  align-self: start;
  padding: 20px 18px 22px;
  background: rgba(15, 27, 61, 0.66);
  border: 1px solid var(--faq-line-soft);
  clip-path: var(--cut-md);
}

.page-faq .faq-jump-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(233, 237, 245, 0.6);
}

.page-faq .faq-jump-link {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 11px 10px 11px 0;
  border-bottom: 1px dashed var(--faq-line-soft);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  position: relative;
  transition: background 180ms var(--ease), padding-left 180ms var(--ease);
}

.page-faq .faq-jump-link:last-child {
  border-bottom: 0;
}

.page-faq .faq-jump-link:hover,
.page-faq .faq-jump-link:focus-visible {
  padding-left: 10px;
  background: rgba(23, 168, 139, 0.14);
}

.page-faq .faq-jump-no {
  font-size: 13px;
  color: var(--jade);
}

.page-faq .faq-jump-count {
  font-size: 12px;
  color: var(--gold-soft);
}

/* ---------- 总览 ---------- */

.page-faq .faq-overview {
  padding: 56px 0 8px;
}

.page-faq .faq-overview .section-title {
  margin: 8px 0 0;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-overview .section-lead {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-overview-grid {
  display: grid;
  gap: 30px;
  margin-top: 30px;
}

.page-faq .faq-index-grid {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

.page-faq .faq-idx > a {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "no name count"
    "no desc desc";
  align-items: baseline;
  gap: 4px 12px;
  padding: 16px 4px 16px 0;
  text-decoration: none;
  color: inherit;
  border-left: 3px solid transparent;
  transition: border-color 180ms var(--ease), background 180ms var(--ease), padding-left 180ms var(--ease);
}

.page-faq .faq-idx > a:hover,
.page-faq .faq-idx > a:focus-visible {
  border-left-color: var(--jade);
  padding-left: 14px;
  background: var(--mist);
}

.page-faq .faq-idx .index-no {
  grid-area: no;
  font-size: 20px;
  color: var(--jade-deep);
  letter-spacing: 0.04em;
}

.page-faq .faq-idx-name {
  grid-area: name;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-idx-count {
  grid-area: count;
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-idx-desc {
  grid-area: desc;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-overview-figure {
  margin: 0;
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: var(--cut-md);
}

.page-faq .faq-overview-figure .media-caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-board {
  padding: 40px 0 60px;
}

.page-faq .faq-board-inner {
  display: grid;
  gap: 28px;
}

.page-faq .faq-rail {
  align-self: start;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding: 14px 16px;
  background: var(--mist);
  border-left: 3px solid var(--jade);
}

.page-faq .faq-rail-title {
  flex-basis: 100%;
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .chapter-rail-link {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .chapter-rail-link:hover,
.page-faq .chapter-rail-link:focus-visible,
.page-faq .chapter-rail-link[aria-current="true"],
.page-faq .chapter-rail-link.is-active {
  color: var(--jade-deep);
  border-bottom-color: var(--jade);
}

.page-faq .faq-cat {
  padding: 0 0 34px;
  scroll-margin-top: 120px;
}

.page-faq .faq-cat-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 16px 18px;
  margin-bottom: 18px;
  background: var(--ink-900);
  color: var(--paper);
  clip-path: var(--cut-md);
}

.page-faq .faq-cat--alt .faq-cat-head {
  background: var(--indigo-600);
}

.page-faq .faq-cat-no {
  font-size: 24px;
  line-height: 1;
  color: var(--jade);
  letter-spacing: 0.04em;
}

.page-faq .faq-cat-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-cat-desc {
  flex-basis: 100%;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(233, 237, 245, 0.74);
}

.page-faq .faq-item {
  margin-bottom: 10px;
  background: var(--paper);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--indigo-600);
  clip-path: var(--cut-sm);
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-item:hover {
  border-left-color: var(--jade);
}

.page-faq .faq-item[open] {
  border-left-color: var(--jade);
  background: var(--mist);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--jade);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 3px;
}

.page-faq .faq-no {
  flex: none;
  padding: 2px 6px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--jade-deep);
  background: rgba(23, 168, 139, 0.12);
}

.page-faq .faq-a {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

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

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

.page-faq .faq-steps li {
  position: relative;
  margin-bottom: 9px;
  padding-left: 36px;
}

.page-faq .faq-steps li::before {
  counter-increment: faq-step;
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--jade-deep);
  background: rgba(23, 168, 139, 0.14);
}

.page-faq .faq-note {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--jade);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-flow {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  margin: 10px 0 0;
}

/* ---------- 尚未解决 ---------- */

.page-faq .faq-next {
  margin-top: 6px;
  padding: 28px 22px 30px;
  background: var(--ink-900);
  color: var(--paper);
  clip-path: var(--cut-lg);
  scroll-margin-top: 120px;
}

.page-faq .faq-next-title {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-next-lead {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(233, 237, 245, 0.8);
}

.page-faq .faq-prepare {
  display: grid;
  gap: 0;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-prepare li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-prepare-key {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .faq-prepare-text {
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(233, 237, 245, 0.86);
}

.page-faq .faq-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-next .btn-line,
.page-faq .faq-next .btn-ghost {
  color: var(--paper);
  border-color: rgba(233, 237, 245, 0.42);
}

.page-faq .faq-next .btn-line:hover,
.page-faq .faq-next .btn-ghost:hover,
.page-faq .faq-next .btn-line:focus-visible,
.page-faq .faq-next .btn-ghost:focus-visible {
  color: var(--paper);
  border-color: var(--jade);
}

.page-faq .faq-next-meta {
  margin-top: 22px;
  display: grid;
  gap: 8px;
}

.page-faq .faq-next-meta p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(233, 237, 245, 0.68);
}

/* ---------- 收口带 ---------- */

.page-faq .faq-out {
  background: var(--indigo-800);
  color: var(--paper);
  padding: 44px 0;
}

.page-faq .faq-out-inner {
  display: grid;
  gap: 22px;
}

.page-faq .faq-out-title {
  margin: 0;
  font-size: clamp(1.3rem, 2.6vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-out-text {
  margin: 10px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(233, 237, 245, 0.76);
}

.page-faq .faq-out-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-out .btn-line,
.page-faq .faq-out .btn-ghost {
  color: var(--paper);
  border-color: rgba(233, 237, 245, 0.42);
}

.page-faq .faq-out .btn-line:hover,
.page-faq .faq-out .btn-ghost:hover,
.page-faq .faq-out .btn-line:focus-visible,
.page-faq .faq-out .btn-ghost:focus-visible {
  color: var(--paper);
  border-color: var(--jade);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 56px 0 64px;
  }

  .page-faq .faq-hero .lede {
    font-size: 17px;
  }

  .page-faq .faq-overview {
    padding-top: 72px;
  }

  .page-faq .faq-prepare li {
    grid-template-columns: 72px 1fr;
    align-items: baseline;
    gap: 14px;
  }

  .page-faq .faq-out-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.78fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-overview-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-board-inner {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 124px;
    display: block;
    padding: 20px 18px 22px;
  }

  .page-faq .faq-rail-title {
    margin-bottom: 12px;
  }

  .page-faq .chapter-rail-link {
    display: block;
    padding: 9px 0;
  }
}

@media (min-width: 1100px) {
  .page-faq {
    --faq-rail: 258px;
  }

  .page-faq .faq-next {
    padding: 38px 34px 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump-link,
  .page-faq .faq-idx > a,
  .page-faq .faq-item,
  .page-faq .chapter-rail-link {
    transition: none;
  }
}