.page-faq {
  padding-block: clamp(1rem, 2.5vw, 1.75rem) clamp(2rem, 5vw, 3.5rem);
  color: var(--ink);
}

.page-faq .faq-wrap {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-faq .faq-crumb {
  margin-bottom: clamp(0.75rem, 1.5vw, 1.1rem);
}

.page-faq .faq-crumb .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

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

.page-faq .faq-crumb .breadcrumb a:hover {
  color: var(--blue);
}

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

/* ---------- 首屏框景 ---------- */
.page-faq .hero-frame {
  position: relative;
  padding: clamp(1.1rem, 2.5vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background-color: var(--panel);
  background-image:
    linear-gradient(rgba(30, 42, 54, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 54, 0.55) 1px, transparent 1px);
  background-size: 56px 56px;
  overflow: hidden;
}

.page-faq .hero-frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(1.1rem, 2.5vw, 2rem);
  right: 35%;
  height: 1px;
  background: linear-gradient(90deg, var(--green), transparent);
}

.page-faq .hero-grid {
  display: grid;
  gap: 1.5rem;
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
}

.page-faq h1 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: 0.005em;
}

.page-faq .lede {
  margin-top: 0.9rem;
  max-width: 40rem;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

.page-faq .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.3rem;
}

.page-faq .cat-index {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.4rem 0 0;
  padding: 0;
}

.page-faq .cat-index a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(7, 11, 16, 0.55);
  color: var(--ink);
  font-size: 0.82rem;
  text-decoration: none;
  transition: border-color var(--dur), background var(--dur), color var(--dur);
}

.page-faq .cat-index a:hover,
.page-faq .cat-index a:focus-visible {
  border-color: var(--green);
  background: var(--green-deep);
  color: var(--green);
}

.page-faq .cat-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--green);
}

.page-faq .hero-figure .figure {
  display: block;
  margin: 0;
}

.page-faq .figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  object-fit: cover;
}

.page-faq .hero-figure img {
  max-height: 460px;
  object-position: top center;
}

.page-faq .figure-caption {
  margin: 0.6rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 四步迁移清单 ---------- */
.page-faq .migrate {
  display: grid;
  gap: 1.4rem;
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
  padding: clamp(1.1rem, 2.5vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel-2);
}

.page-faq .migrate-intro h2 {
  margin: 0.55rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: var(--step-h2);
  font-weight: 600;
  line-height: 1.15;
}

.page-faq .migrate-intro p {
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.page-faq .migrate-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.82rem;
}

.page-faq .step-list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.page-faq .step {
  position: relative;
}

.page-faq .step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -0.6rem;
  width: 2px;
  height: 0.6rem;
  border-radius: 2px;
  background: var(--line);
}

.page-faq .step-check {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .step-label {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.7rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  cursor: pointer;
  transition: border-color var(--dur), background var(--dur), transform var(--dur);
}

.page-faq .step-label:hover {
  border-color: rgba(182, 255, 60, 0.45);
}

.page-faq .step-check:focus-visible + .step-label {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.page-faq .step-check:checked + .step-label {
  border-color: var(--green);
  background: var(--green-deep);
}

.page-faq .step-num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--green);
  padding-top: 0.15rem;
}

.page-faq .step-body strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.page-faq .step-desc {
  display: block;
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.65;
}

.page-faq .step-check:checked + .step-label .step-desc {
  color: rgba(242, 246, 248, 0.78);
}

.page-faq .step-mark {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 0.1rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--bg);
  font-size: 0.7rem;
  line-height: 1;
  transition: background var(--dur), border-color var(--dur);
}

.page-faq .step-check:checked + .step-label .step-mark {
  background: var(--green);
  border-color: var(--green);
}

.page-faq .step-check:checked + .step-label .step-mark::after {
  content: "✓";
}

/* ---------- 问答区 ---------- */
.page-faq .qa-board {
  margin-top: clamp(2rem, 4vw, 3rem);
}

.page-faq .qa-head h2 {
  margin: 0.55rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: var(--step-h2);
  font-weight: 600;
  line-height: 1.15;
}

.page-faq .qa-head p {
  max-width: 46rem;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.page-faq .faq-board {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.4rem;
}

.page-faq .filter-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-faq .filter-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color var(--dur), background var(--dur), color var(--dur);
}

.page-faq .filter-pill:hover {
  border-color: var(--blue);
  color: var(--ink);
}

.page-faq .filter-input:checked + .filter-pill {
  border-color: var(--green);
  background: var(--green);
  color: #070B10;
  font-weight: 600;
}

.page-faq .filter-input:focus-visible + .filter-pill {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.page-faq .faq-groups {
  flex: 1 0 100%;
  display: grid;
  gap: 1rem;
  margin-top: 0.9rem;
}

.page-faq #f-account:checked ~ .faq-groups .faq-group:not([data-cat="account"]),
.page-faq #f-lineup:checked ~ .faq-groups .faq-group:not([data-cat="lineup"]),
.page-faq #f-table:checked ~ .faq-groups .faq-group:not([data-cat="table"]),
.page-faq #f-nav:checked ~ .faq-groups .faq-group:not([data-cat="nav"]),
.page-faq #f-fix:checked ~ .faq-groups .faq-group:not([data-cat="fix"]),
.page-faq #f-prep:checked ~ .faq-groups .faq-group:not([data-cat="prep"]) {
  display: none;
}

.page-faq .faq-group {
  padding: clamp(1rem, 2vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
}

.page-faq .group-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.page-faq .group-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--green);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 0.1rem 0.5rem;
}

.page-faq .qa-group-body {
  display: grid;
  gap: 1.2rem;
}

.page-faq .qa-list {
  min-width: 0;
}

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

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.9rem;
  padding: 0.85rem 0;
  font-size: 0.94rem;
  font-weight: 500;
  line-height: 1.55;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa summary:hover {
  color: var(--green);
}

.page-faq .qa-mark {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 0.3rem;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  border-radius: 2px;
  background: var(--blue);
}

.page-faq .qa-mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .qa-mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
  transition: transform var(--dur);
}

.page-faq .qa[open] .qa-mark::after {
  transform: scaleY(0);
}

.page-faq .qa[open] summary {
  color: var(--ink);
}

.page-faq .qa-body {
  padding-bottom: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.75;
}

.page-faq .qa-body p + p {
  margin-top: 0.55rem;
}

.page-faq .qa-body a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(39, 199, 255, 0.4);
}

.page-faq .qa-body a:hover {
  color: var(--green);
  border-bottom-color: var(--green);
}

.page-faq .qa-body .tag {
  vertical-align: middle;
}

.page-faq .group-figure {
  display: block;
  margin: 0.4rem 0 0;
}

/* ---------- 底部行动 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(2rem, 4vw, 3.2rem);
}

.page-faq .cta-inner {
  display: grid;
  gap: 1.1rem;
  padding: clamp(1.2rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: var(--radius-lg);
  background: var(--panel-2);
}

.page-faq .cta-copy h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: var(--step-h2);
  font-weight: 600;
  line-height: 1.15;
}

.page-faq .cta-copy p {
  max-width: 42rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-faq .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-content: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 2.2rem;
    align-items: start;
  }

  .page-faq .hero-figure img {
    max-height: 520px;
  }

  .page-faq .migrate {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: 2rem;
    align-items: start;
  }

  .page-faq .qa-group-body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 1.6rem;
    align-items: start;
  }

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

  .page-faq .cta-actions {
    justify-content: flex-end;
    max-width: 22rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-groups {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .step-label {
    padding: 1rem 1.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .cat-index a,
  .page-faq .step-label,
  .page-faq .step-mark,
  .page-faq .filter-pill,
  .page-faq .qa-mark::after {
    transition: none;
  }
}