.page-faq {
  --faq-rail: 244px;
  --faq-gap: clamp(20px, 4vw, 44px);
  --faq-line: rgba(34, 211, 238, 0.34);
}

.page-faq img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑与首屏 ---------- */
.page-faq .faq-crumbs {
  padding-top: calc(var(--header-h) + 20px);
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.page-faq .faq-lead {
  padding-top: clamp(20px, 4vw, 44px);
}

.page-faq .faq-lead__grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: center;
}

.page-faq .faq-lead__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.6vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 12px 0 16px;
}

.page-faq .faq-lead .lede {
  color: var(--text);
  font-size: 1.03rem;
  line-height: 1.78;
  max-width: 42em;
}

.page-faq .faq-lead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-lead__figure {
  margin: 0;
  border: 2px solid var(--edge);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

/* ---------- 步骤带 ---------- */
.page-faq .faq-steps {
  margin-top: clamp(38px, 7vw, 76px);
}

.page-faq .faq-head {
  max-width: 46rem;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-head__note {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.72;
  margin: 10px 0 0;
}

.page-faq .step-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .step-rail > li {
  display: flex;
}

.page-faq .step-card {
  display: block;
  flex: 1;
  padding: 20px 20px 22px;
  border: 2px solid var(--edge);
  background: linear-gradient(158deg, rgba(11, 18, 36, 0.96), rgba(5, 7, 15, 0.96));
  box-shadow: var(--shadow-hard);
  color: var(--text);
  text-decoration: none;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-faq .step-card:hover,
.page-faq .step-card:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
  box-shadow: 10px 10px 0 rgba(3, 5, 12, 0.92);
}

.page-faq .step-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 7vw, 3.2rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  background: linear-gradient(118deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-faq .step-card__title {
  margin: 14px 0 8px;
  font-size: 1.08rem;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-faq .step-card__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--text);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  margin-top: clamp(40px, 7vw, 86px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-toc {
  border: 2px solid var(--edge);
  background: var(--panel);
  padding: 18px;
}

.page-faq .faq-toc .toc-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--violet);
}

.page-faq .faq-toc .toc-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-toc .toc-list > li {
  flex: 0 0 auto;
}

.page-faq .faq-toc .toc-link {
  display: block;
  padding: 8px 12px;
  border: 1px solid var(--edge);
  color: var(--text);
  text-decoration: none;
  font-size: 0.88rem;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-toc .toc-link:hover,
.page-faq .faq-toc .toc-link:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
}

.page-faq .faq-toc__hint {
  margin: 14px 0 0;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 问答画板 ---------- */
.page-faq .faq-group {
  padding: clamp(20px, 3.6vw, 34px);
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 10px;
  justify-items: start;
  margin-bottom: 18px;
}

.page-faq .faq-group__head .section-title {
  margin: 0;
}

.page-faq .faq-group__note {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.74;
  max-width: 46em;
}

.page-faq .faq-group__figure {
  margin: 0 0 20px;
  border: 1px solid var(--edge);
  background: var(--void);
}

.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  border: 2px solid var(--edge);
  background: rgba(5, 7, 15, 0.72);
  transition: border-color 0.22s var(--ease);
}

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

.page-faq .faq-q {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 15px 48px 15px 16px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
}

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

.page-faq .faq-q::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-q::after {
  content: "–";
  color: var(--violet);
}

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

.page-faq .faq-a {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--edge);
  color: var(--text);
  font-size: 0.96rem;
  line-height: 1.76;
  animation: page-faq-fade 0.28s var(--ease) both;
}

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

.page-faq .faq-a p + p {
  margin-top: 10px;
}

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

@keyframes page-faq-fade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a {
    animation: none;
  }
  .page-faq .step-card {
    transition: none;
  }
}

/* ---------- 联系信息条 ---------- */
.page-faq .faq-note-bar {
  margin-top: 22px;
  display: grid;
  gap: 14px;
  padding: 18px 20px;
  border: 2px solid var(--amber);
  background: linear-gradient(118deg, rgba(245, 158, 11, 0.16), rgba(34, 211, 238, 0.12));
}

.page-faq .faq-note-bar__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-note-bar__val {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.98rem;
  color: var(--white);
  word-break: break-word;
  overflow-wrap: anywhere;
}

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  margin-top: clamp(42px, 6vw, 78px);
}

.page-faq .faq-next__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-next__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  padding: 18px 20px;
  border: 2px solid var(--edge);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  text-decoration: none;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
}

.page-faq .faq-next__link strong {
  color: var(--white);
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}

.page-faq .faq-next__link span {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-note-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-lead__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .step-rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-faq .faq-toc .toc-list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc .toc-list > li {
    flex: 1 1 auto;
  }

  .page-faq .faq-toc .toc-link {
    padding: 10px 12px;
    border: 0;
    border-left: 2px solid var(--edge);
    white-space: normal;
    font-size: 0.92rem;
  }

  .page-faq .faq-toc .toc-link:hover,
  .page-faq .faq-toc .toc-link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(34, 211, 238, 0.08);
  }
}