.page-faq {
  --faq-border: 2px solid var(--ink);
  --faq-border-heavy: 3px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: clip;
}

.page-faq a {
  color: inherit;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible,
.page-faq button:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
}

.page-faq .faq-crumbs-row {
  padding-block: 14px 8px;
}

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--deep);
  color: var(--snow);
  border-bottom: var(--faq-border-heavy);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 82% 18%, rgba(169, 211, 230, 0.22) 0 11%, transparent 12%),
    repeating-linear-gradient(115deg, transparent 0 28px, rgba(169, 211, 230, 0.08) 28px 29px);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 5vw, 48px);
  padding-block: clamp(34px, 7vw, 76px) clamp(30px, 5vw, 58px);
}

.page-faq .faq-hero__copy {
  min-width: 0;
}

.page-faq .faq-hero .eyebrow {
  color: var(--frost);
}

.page-faq .faq-hero h1 {
  max-width: 14ch;
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 10vw, 6rem);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.03em;
}

.page-faq .faq-hero .lead {
  max-width: 58ch;
  color: var(--snow);
  font-size: clamp(1rem, 2.2vw, 1.12rem);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-block: 24px 16px;
}

.page-faq .faq-hero .btn--ghost {
  border-color: var(--snow);
  color: var(--snow);
}

.page-faq .faq-hero .btn--ghost:hover {
  background: var(--snow);
  color: var(--ink);
}

.page-faq .faq-hero__note {
  max-width: 56ch;
  margin-bottom: 0;
  color: var(--frost);
  font-size: 0.84rem;
}

.page-faq .faq-index {
  position: relative;
  align-self: start;
  padding: clamp(18px, 4vw, 26px);
  background: var(--paper);
  color: var(--ink);
  border: var(--faq-border-heavy);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-index::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--signal);
  border-bottom: var(--faq-border);
}

.page-faq .faq-index__kicker {
  margin: 8px 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--ice);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--faq-border);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.page-faq .faq-index__link::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--ice);
  transition: transform 180ms var(--ease);
}

.page-faq .faq-index__link:hover {
  background: var(--fog);
}

.page-faq .faq-index__link:hover::after {
  transform: translateX(4px);
  color: var(--signal);
}

.page-faq .faq-index__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

.page-faq .faq-index__foot {
  margin: 10px 0 0;
  font-size: 0.78rem;
  color: var(--ink);
}

.page-faq .faq-figure {
  padding-block: clamp(22px, 4vw, 38px);
}

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

.page-faq .faq-figure__frame {
  overflow: hidden;
  background: var(--fog);
  border: var(--faq-border-heavy);
  box-shadow: var(--shadow-hard);
}

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

.page-faq .faq-figure__caption {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--ink);
}

.page-faq .section {
  padding-block: clamp(42px, 7vw, 84px);
}

.page-faq .faq-rail-section,
.page-faq .faq-questions,
.page-faq .faq-contact {
  scroll-margin-top: 120px;
}

.page-faq .faq-section-head {
  display: grid;
  gap: 12px;
  max-width: 880px;
  margin-bottom: clamp(26px, 5vw, 46px);
}

.page-faq .faq-section-head h2,
.page-faq .faq-new h2,
.page-faq .faq-contact h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-faq .faq-section-head p:last-child,
.page-faq .faq-new__intro p:last-child {
  max-width: 70ch;
  margin-bottom: 0;
}

.page-faq .faq-rail-layout {
  display: grid;
  gap: 28px;
}

.page-faq .faq-rail {
  align-self: start;
  padding: 16px;
  background: var(--paper);
  border: var(--faq-border-heavy);
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--ice);
}

.page-faq .faq-rail__list {
  position: relative;
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__list::before {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 18px;
  z-index: 0;
  width: 2px;
  background: var(--ink);
}

.page-faq .faq-rail__item {
  position: relative;
  z-index: 1;
}

.page-faq .faq-step-check {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.page-faq .faq-rail__node {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 10px;
  padding: 8px;
  background: var(--paper);
  border: var(--faq-border);
  cursor: pointer;
}

.page-faq .faq-rail__num {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--ice);
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}

.page-faq .faq-rail__label {
  min-width: 0;
  font-weight: 600;
}

.page-faq .faq-rail__mark {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 2px solid var(--ink);
  background: var(--snow);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1;
}

.page-faq .faq-step-check:checked + .faq-rail__node {
  background: var(--fog);
}

.page-faq .faq-step-check:checked + .faq-rail__node .faq-rail__num {
  background: var(--pine);
}

.page-faq .faq-step-check:checked + .faq-rail__node .faq-rail__mark {
  background: var(--pine);
  color: var(--snow);
  border-color: var(--pine);
}

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

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

.page-faq .faq-rail__hint {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--ink);
  font-size: 0.78rem;
}

.page-faq .faq-rail__content {
  min-width: 0;
}

.page-faq .faq-step {
  padding-bottom: 26px;
  border-bottom: var(--faq-border);
}

.page-faq .faq-step + .faq-step {
  padding-top: 26px;
}

.page-faq .faq-step:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-step__badge {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--ice);
}

.page-faq .faq-step h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.15;
}

.page-faq .faq-step p {
  max-width: 70ch;
}

.page-faq .faq-checks {
  margin: 14px 0;
  padding: 12px 14px;
  list-style: none;
  background: var(--fog);
  border-left: 4px solid var(--signal);
}

.page-faq .faq-checks li {
  position: relative;
  margin: 6px 0;
  padding-left: 18px;
  font-size: 0.95rem;
}

.page-faq .faq-checks li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--ice);
}

.page-faq .faq-step__links {
  font-size: 0.9rem;
}

.page-faq .faq-step__links a,
.page-faq .faq-contact__copy a,
.page-faq .faq-answer a {
  color: var(--ice);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-new {
  background: var(--fog);
  border-block: var(--faq-border-heavy);
}

.page-faq .faq-new__intro {
  max-width: 780px;
  margin-bottom: clamp(26px, 5vw, 42px);
}

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

.page-faq .faq-path__item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0 22px;
  border-top: var(--faq-border-heavy);
}

.page-faq .faq-path__num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--signal);
}

.page-faq .faq-path__item h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.page-faq .faq-path__item p {
  margin: 0;
  font-size: 0.94rem;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.page-faq .faq-filter__link {
  display: inline-flex;
  padding: 8px 12px;
  background: var(--paper);
  border: var(--faq-border);
  font-size: 0.86rem;
  text-decoration: none;
}

.page-faq .faq-filter__link:hover {
  background: var(--signal);
  border-color: var(--ink);
}

.page-faq .faq-groups {
  display: grid;
  gap: 30px;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 120px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 6px;
  padding-bottom: 10px;
  border-bottom: var(--faq-border-heavy);
}

.page-faq .faq-group__code {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--ice);
}

.page-faq .faq-group__head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.55rem;
  line-height: 1.15;
}

.page-faq .faq-group__head p {
  margin: 2px 0 0;
  font-size: 0.9rem;
}

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

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px;
  align-items: start;
  gap: 10px;
  padding: 14px 0;
  list-style: none;
  font-weight: 600;
  cursor: pointer;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1.2;
  text-align: center;
  color: var(--ice);
}

.page-faq .faq-item[open] {
  padding-left: 12px;
  background: var(--snow);
  border-left: 4px solid var(--signal);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--signal);
}

.page-faq .faq-answer {
  padding: 0 0 18px;
  font-size: 0.96rem;
}

.page-faq .faq-answer__steps {
  margin: 10px 0;
  padding-left: 22px;
}

.page-faq .faq-answer__steps li {
  margin: 4px 0;
}

.page-faq .faq-version-section {
  background: var(--deep);
  color: var(--snow);
  border-block: var(--faq-border-heavy);
}

.page-faq .faq-version {
  display: grid;
  gap: 28px;
  padding-block: clamp(42px, 7vw, 84px) 28px;
}

.page-faq .faq-version .eyebrow {
  color: var(--frost);
}

.page-faq .faq-version h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-faq .faq-version__copy {
  min-width: 0;
}

.page-faq .faq-version__copy p {
  max-width: 62ch;
  color: var(--snow);
}

.page-faq .faq-version__format {
  margin: 22px 0;
}

.page-faq .faq-version__format div {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.28);
}

.page-faq .faq-version__format dt {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--frost);
}

.page-faq .faq-version__format dd {
  margin: 0;
  color: var(--snow);
}

.page-faq .faq-version__note {
  font-size: 0.86rem;
  color: var(--frost);
}

.page-faq .faq-version__figure {
  margin: 0;
  align-self: end;
}

.page-faq .faq-version__figure .img-frame {
  overflow: hidden;
  background: var(--deep);
  border: 3px solid var(--snow);
  box-shadow: 6px 6px 0 var(--ice);
}

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

.page-faq .faq-version__figure .img-frame__caption {
  color: var(--frost);
}

.page-faq .faq-timeline-wrap {
  padding-bottom: clamp(42px, 7vw, 84px);
}

.page-faq .faq-timeline__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--frost);
}

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

.page-faq .faq-batch {
  padding-top: 12px;
  border-top: 3px solid var(--signal);
}

.page-faq .faq-batch summary {
  display: grid;
  gap: 2px;
  padding-bottom: 12px;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-batch summary::after {
  content: "查看摘要 +";
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--signal);
}

.page-faq .faq-batch[open] summary::after {
  content: "收起摘要 −";
}

.page-faq .faq-batch__id {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--frost);
}

.page-faq .faq-batch__date {
  font-size: 0.75rem;
  color: var(--signal);
}

.page-faq .faq-batch__title {
  font-weight: 600;
  color: var(--snow);
}

.page-faq .faq-batch__body {
  padding: 0 0 16px;
  color: var(--snow);
  font-size: 0.9rem;
}

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

.page-faq .faq-contact__copy {
  min-width: 0;
}

.page-faq .faq-contact__card {
  min-width: 0;
  padding: clamp(18px, 4vw, 28px);
  background: var(--snow);
  border: var(--faq-border-heavy);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-contact__card h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.55rem;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-top: 1px solid rgba(16, 24, 32, 0.24);
}

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--ice);
}

.page-faq .faq-contact__value {
  overflow-wrap: anywhere;
  font-size: 0.98rem;
}

.page-faq .faq-contact__actions {
  margin: 12px 0 4px;
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(16, 24, 32, 0.24);
  font-size: 0.82rem;
}

.page-faq .faq-closing {
  background: var(--signal);
  color: var(--ink);
  border-top: var(--faq-border-heavy);
}

.page-faq .faq-closing__inner {
  display: grid;
  gap: 16px;
  max-width: 920px;
  padding-block: clamp(42px, 7vw, 74px);
}

.page-faq .faq-closing .eyebrow {
  color: var(--ink);
}

.page-faq .faq-closing h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4.2rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
}

.page-faq .faq-closing p {
  max-width: 64ch;
  margin-bottom: 0;
}

.page-faq .faq-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.page-faq [data-reveal].is-in {
  animation: faq-rise 420ms var(--ease) both;
}

@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 640px) {
  .page-faq .faq-contact__row {
    grid-template-columns: 56px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-faq .faq-path__item {
    grid-template-columns: 56px minmax(0, 1fr);
  }
}

@media (min-width: 760px) {
  .page-faq .faq-path {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-path__item {
    display: block;
    padding: 16px 0 20px;
  }

  .page-faq .faq-path__num {
    display: block;
    margin-bottom: 8px;
  }

  .page-faq .faq-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px 32px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(250px, 0.7fr);
    align-items: start;
  }

  .page-faq .faq-index {
    margin-top: 12px;
    transform: rotate(1.4deg);
  }

  .page-faq .faq-rail-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: clamp(30px, 5vw, 56px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 132px;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    align-items: start;
    gap: clamp(30px, 5vw, 56px);
  }

  .page-faq .faq-version {
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    align-items: end;
    gap: clamp(30px, 5vw, 56px);
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.62fr);
  }

  .page-faq .faq-section-head {
    margin-bottom: 50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal].is-in {
    animation: none;
  }

  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}