.page-faq {
  --faq-rail-w: 268px;
  --faq-amber: var(--amber-500);
  background: var(--ink-950);
  color: var(--text-dark-bg);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(104px, 18vw, 184px) 0 clamp(40px, 6vw, 72px);
  background: linear-gradient(150deg, var(--ink-900) 0%, var(--ink-950) 62%);
  isolation: isolate;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(52%, 560px);
  height: 100%;
  background: linear-gradient(200deg, var(--ink-800) 0%, rgba(14, 36, 64, 0) 78%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  z-index: -1;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: clamp(64px, 12vw, 180px);
  height: 5px;
  background: var(--amber-500);
}

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

.page-faq .crumbs {
  margin-bottom: clamp(20px, 3vw, 32px);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber-500);
}

.page-faq .t-display {
  margin: 0;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.12;
  letter-spacing: .04em;
  color: var(--text-dark-bg);
}

.page-faq .faq-hero__lead {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--text-dark-mute);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1;
  color: var(--amber-500);
}

.page-faq .faq-stat__label {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-dark-mute);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

/* ---------- 左侧分类 ---------- */
.page-faq .faq-rail {
  padding: 16px 0 8px;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--text-dark-faint);
  text-transform: uppercase;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__item {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line-dark);
  color: var(--text-dark-mute);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber-500);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--text-dark-bg);
  border-color: var(--amber-300);
}

.page-faq .faq-rail__link[data-active="true"] {
  color: var(--ink-950);
  background: var(--amber-500);
  border-color: var(--amber-500);
}

.page-faq .faq-rail__link[data-active="true"] .faq-rail__num {
  color: var(--ink-950);
}

.page-faq .faq-rail__hint {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-dark-faint);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  min-width: 0;
}

.page-faq .faq-sec {
  padding: clamp(26px, 4vw, 44px) clamp(18px, 3.4vw, 40px);
  min-width: 0;
}

.page-faq .faq-sec--paper {
  background: var(--paper-100);
  color: var(--text-paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-sec--dark {
  background: var(--ink-900);
  border: 1px solid var(--line-dark-soft);
  clip-path: polygon(26px 0, 100% 0, 100% 100%, 0 100%, 0 26px);
}

.page-faq .faq-sec__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-sec__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--amber-500);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.3;
  letter-spacing: .04em;
}

.page-faq .faq-sec__desc {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-paper-mute);
}

.page-faq .faq-sec--dark .faq-sec__desc {
  color: var(--text-dark-mute);
}

/* 折叠问答 */
.page-faq .faq-item {
  border-top: 1px solid var(--line-paper);
}

.page-faq .faq-item:last-of-type {
  border-bottom: 1px solid var(--line-paper);
}

.page-faq .faq-sec--dark .faq-item {
  border-top-color: var(--line-dark);
}

.page-faq .faq-sec--dark .faq-item:last-of-type {
  border-bottom-color: var(--line-dark);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) 20px;
  gap: 10px;
  align-items: start;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: .01em;
  transition: color .18s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--amber-500);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 3px;
}

.page-faq .faq-item__id {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.9;
  color: var(--amber-500);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid currentColor;
  color: var(--text-paper-mute);
  transition: transform .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-sec--dark .faq-item__sign {
  color: var(--text-dark-mute);
}

.page-faq .faq-item__sign::before {
  content: "+";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
}

.page-faq .faq-item[open] .faq-item__sign {
  color: var(--celadon-500);
  border-color: var(--celadon-500);
  transform: rotate(180deg);
}

.page-faq .faq-item[open] .faq-item__sign::before {
  content: "\2212";
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--amber-500);
}

.page-faq .faq-item__body {
  margin: 0 0 20px 26px;
  padding: 2px 0 2px 14px;
  border-left: 3px solid var(--line-paper);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-paper-mute);
}

.page-faq .faq-sec--dark .faq-item__body {
  border-left-color: var(--line-dark);
  color: var(--text-dark-mute);
}

.page-faq .faq-item[open] .faq-item__body {
  border-left-color: var(--celadon-500);
}

.page-faq .faq-item__body p {
  margin: 0 0 8px;
}

.page-faq .faq-item__concl {
  font-weight: 600;
  color: var(--text-paper);
}

.page-faq .faq-sec--dark .faq-item__concl {
  color: var(--text-dark-bg);
}

.page-faq .faq-item__rows {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
}

.page-faq .faq-item__row {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-paper);
}

.page-faq .faq-sec--dark .faq-item__row {
  border-bottom-color: var(--line-dark-soft);
}

.page-faq .faq-item__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--amber-500);
}

.page-faq .faq-item__row dd {
  margin: 0;
  font-size: 14px;
}

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

/* 联系方式小表 */
.page-faq .faq-contact {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 12px 14px;
  background: var(--paper-200);
  border-left: 3px solid var(--amber-500);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
}

.page-faq .faq-contact__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--text-paper-mute);
}

.page-faq .faq-contact__v {
  color: var(--black-900);
  word-break: break-word;
}

/* 配图 */
.page-faq .figure {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
}

.page-faq .figure__frame {
  overflow: hidden;
  border: 1px solid var(--line-dark);
  background: var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

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

.page-faq .figure__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-dark-faint);
}

/* CTA 区 */
.page-faq .faq-sec--cta {
  background: linear-gradient(155deg, var(--ink-800) 0%, var(--ink-950) 82%);
}

.page-faq .faq-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-step {
  padding: 14px 16px;
  border-left: 3px solid var(--amber-500);
  background: rgba(245, 238, 223, .05);
}

.page-faq .faq-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--amber-300);
}

.page-faq .faq-step__title {
  margin: 6px 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark-bg);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-dark-mute);
}

.page-faq .faq-cta {
  display: grid;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-cta__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: .02em;
  color: var(--text-dark-mute);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-item__q {
    font-size: 16.5px;
    padding: 17px 0;
  }

  .page-faq .faq-sec__desc {
    font-size: 15px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    padding: 0 0 0 18px;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line-dark);
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail__item + .faq-rail__item {
    margin-top: 0;
  }

  .page-faq .faq-rail__link {
    display: flex;
    width: 100%;
    padding: 10px 0;
    border: 0;
    border-top: 1px solid var(--line-dark-soft);
    font-size: 13.5px;
    white-space: normal;
  }

  .page-faq .faq-rail__link[data-active="true"] {
    background: transparent;
    color: var(--amber-500);
    border-color: var(--line-dark-soft);
  }

  .page-faq .faq-rail__link[data-active="true"] .faq-rail__num {
    color: var(--amber-500);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-color: var(--line-dark-soft);
  }

  .page-faq .t-display {
    max-width: 17em;
  }

  .page-faq .faq-sec {
    padding: clamp(34px, 3.6vw, 52px) clamp(30px, 3.6vw, 52px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__sign,
  .page-faq .faq-item__q,
  .page-faq .faq-rail__link {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__sign {
    transform: none;
  }
}
<<<END>>>