.page-faq {
  --faq-rule: var(--rule);
  --faq-sticky-top: 96px;
}

.page-faq .breadcrumb {
  padding-top: 24px;
}

.page-faq .faq-hero {
  padding-top: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 16em;
  font-size: var(--fs-display);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 24px 0 0;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--fog);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 40px;
}

.page-faq .faq-hero__meta li {
  font-size: var(--fs-small);
  line-height: 1.6;
  color: var(--fog);
}

.page-faq .faq-hero__k {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.2em;
  color: var(--fox);
}

/* ---------- 布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-top: 40px;
  padding-bottom: var(--section-gap);
}

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

/* ---------- 移动端折叠目录 ---------- */

.page-faq .faq-toc-mobile {
  border: 1px solid var(--faq-rule);
  background: var(--ink-2);
}

.page-faq .faq-toc-mobile__summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.page-faq .faq-toc-mobile__summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--fox);
  font-size: 1.125rem;
  line-height: 1;
}

.page-faq .faq-toc-mobile[open] .faq-toc-mobile__summary::after {
  content: "\2212";
}

.page-faq .faq-toc-mobile__summary:focus-visible,
.page-faq .faq-toc-mobile__list a:focus-visible {
  outline: 2px solid var(--fox);
  outline-offset: 2px;
}

.page-faq .faq-toc-mobile__list {
  list-style: none;
  margin: 0;
  padding: 4px 0 12px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-toc-mobile__list li a {
  display: block;
  padding: 12px 18px;
  font-size: var(--fs-small);
  color: var(--fog);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-toc-mobile__list li a:hover {
  color: var(--paper);
  background: var(--hover);
}

/* ---------- 桌面粘性目录 ---------- */

.page-faq .faq-toc {
  display: none;
}

.page-faq .faq-toc__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.24em;
  color: var(--fog);
  text-transform: uppercase;
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-toc__link {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 12px 12px 12px 14px;
  border-left: 1px solid var(--faq-rule);
  border-bottom: 1px solid rgba(58, 65, 77, 0.5);
  font-size: var(--fs-small);
  line-height: 1.5;
  color: var(--fog);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-left-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  color: var(--rule);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--fox);
  background: var(--hover);
}

.page-faq .faq-toc__link:hover .faq-toc__num,
.page-faq .faq-toc__link:focus-visible .faq-toc__num {
  color: var(--fox);
}

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

.page-faq .faq-toc__note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--night);
  font-size: var(--fs-note);
  line-height: 1.8;
  color: var(--fog);
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    column-gap: 64px;
    padding-top: 56px;
  }

  .page-faq .faq-toc-mobile {
    display: none;
  }

  .page-faq .faq-toc {
    display: block;
    position: sticky;
    top: var(--faq-sticky-top);
    align-self: start;
  }
}

/* ---------- 章节 ---------- */

.page-faq .faq-group {
  border-top: 1px solid var(--faq-rule);
  padding-top: 28px;
  margin-top: 56px;
}

.page-faq .faq-group:first-child {
  margin-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 500;
  line-height: 1;
  color: var(--fox);
  font-variant-numeric: tabular-nums;
}

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

.page-faq .faq-group__title {
  margin: 0;
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__lead {
  margin: 12px 0 0;
  max-width: 40em;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--fog);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 0;
  background: var(--fox);
  transition: height var(--dur) var(--ease);
}

.page-faq .faq-item[open]::before {
  height: 100%;
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 18px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-body);
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
  transition: background var(--dur) var(--ease);
}

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

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

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--fog);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
  color: var(--fox);
}

.page-faq .faq-item__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.08em;
  color: var(--rule);
  font-variant-numeric: tabular-nums;
}

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

.page-faq .faq-item__a {
  padding: 4px 18px 26px 46px;
  animation: faq-reveal var(--dur) var(--ease) both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 有序步骤 ---------- */

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

.page-faq .faq-steps li {
  counter-increment: faq-step;
  position: relative;
  padding-left: 42px;
  padding-bottom: 20px;
  font-size: var(--fs-small);
  line-height: 1.85;
  color: var(--fog);
}

.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 28px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fox);
  background: var(--ink);
}

.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 28px;
  bottom: 6px;
  border-left: 1px dotted var(--faq-rule);
}

.page-faq .faq-steps li:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps li:last-child::after {
  display: none;
}

/* ---------- 图文分栏 ---------- */

.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

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

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-rule);
  background: var(--ink-2);
}

.page-faq .faq-figure--phone img {
  max-width: 260px;
  margin: 0 auto;
  border-left: 2px solid var(--steppe);
}

.page-faq .faq-figure--wide {
  margin-bottom: 32px;
}

.page-faq .faq-figure--wide img {
  aspect-ratio: 3 / 2;
  border-left: 2px solid var(--night);
}

.page-faq .faq-figure__caption {
  margin-top: 12px;
  font-size: var(--fs-note);
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--fog);
}

@media (min-width: 860px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-figure--phone img {
    max-width: 100%;
    margin: 0;
  }
}

/* ---------- 联系卡 ---------- */

.page-faq .faq-contact {
  margin-top: 32px;
  padding: 24px 24px 24px 22px;
  border-left: 2px solid var(--fox);
  background: var(--ink-2);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px 32px;
  justify-content: space-between;
}

.page-faq .faq-contact__body {
  min-width: 0;
  flex: 1 1 260px;
}

.page-faq .faq-contact__title {
  margin: 0;
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-contact__text {
  margin: 8px 0 0;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--fog);
}

/* ---------- 术语词典 ---------- */

.page-faq .faq-glossary {
  margin: 0;
  padding: 0;
  columns: 1;
  column-gap: 48px;
}

.page-faq .faq-term {
  break-inside: avoid;
  padding: 18px 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-term dt {
  font-size: var(--fs-body);
  font-weight: 500;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-faq .faq-term dd {
  margin: 8px 0 0;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--fog);
}

@media (min-width: 720px) {
  .page-faq .faq-glossary {
    columns: 2;
  }

  .page-faq .faq-group__head {
    gap: 24px;
  }

  .page-faq .faq-item__q {
    padding: 22px 22px 22px 22px;
  }

  .page-faq .faq-item__a {
    padding: 4px 22px 28px 56px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-group__num {
    font-size: 2.25rem;
  }

  .page-faq .faq-hero {
    padding-top: 56px;
    padding-bottom: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item::before,
  .page-faq .faq-item__q,
  .page-faq .faq-toc__link {
    transition: none;
  }
}
<<<END>>>