.page-faq {
  --faq-rail-w: 224px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  scroll-margin-top: var(--header-h);
  padding: calc(var(--header-h) + 30px) 0 42px;
  background:
    radial-gradient(120% 130% at 92% -20%, rgba(192, 138, 62, 0.22), transparent 58%),
    radial-gradient(90% 100% at 2% 108%, rgba(63, 154, 158, 0.16), transparent 60%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--hair);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(154, 170, 185, 0.07) 1px, transparent 1px);
  background-size: 72px 100%;
  pointer-events: none;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__index {
  position: absolute;
  top: calc(var(--header-h) + 4px);
  right: 4%;
  z-index: 0;
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(76px, 14vw, 176px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(192, 138, 62, 0.16);
  pointer-events: none;
  user-select: none;
}

.page-faq .breadcrumb {
  margin-bottom: 26px;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--copper-300);
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(38px, 7.6vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-faq .faq-hero__lede {
  max-width: 58ch;
  margin: 0 0 30px;
  font-size: 17px;
  line-height: 1.78;
  color: var(--text-muted);
}

/* ---------- 快速过滤 ---------- */
.page-faq .faq-filter {
  max-width: 640px;
  padding: 16px 18px 14px;
  border: 1px solid rgba(63, 154, 158, 0.55);
  border-left: 3px solid var(--celadon-500);
  border-radius: var(--radius);
  background: rgba(63, 154, 158, 0.08);
}

.page-faq .faq-filter__label {
  display: block;
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--celadon-500);
}

.page-faq .faq-filter__input {
  width: 100%;
  max-width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  background: var(--ink-900);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.page-faq .faq-filter__input::placeholder {
  color: rgba(154, 170, 185, 0.75);
}

.page-faq .faq-filter__input:focus-visible {
  outline: 2px solid var(--focus-500);
  outline-offset: 1px;
  border-color: var(--focus-500);
}

.page-faq .faq-filter__hint {
  margin: 9px 0 0;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

/* ---------- 整体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-top: 34px;
  padding-bottom: 84px;
}

/* ---------- 左栏编号索引 ---------- */
.page-faq .faq-rail {
  border-top: 2px solid var(--copper-500);
  padding-top: 14px;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__item {
  flex: none;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  border-left: 2px solid var(--hair);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  white-space: nowrap;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--text-primary);
  border-left-color: var(--cinnabar-600);
  background: rgba(192, 69, 60, 0.1);
  outline: none;
}

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

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--copper-500);
}

.page-faq .faq-rail__back {
  display: inline-block;
  margin-top: 14px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-decoration: none;
}

.page-faq .faq-rail__back:hover,
.page-faq .faq-rail__back:focus-visible {
  color: var(--copper-300);
  border-bottom-color: var(--copper-300);
  outline: none;
}

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

/* ---------- 分区 ---------- */
.page-faq .faq-sec {
  --sec-accent: var(--copper-500);
  scroll-margin-top: calc(var(--header-h) + 20px);
  margin-bottom: 52px;
}

.page-faq .faq-sec:last-child {
  margin-bottom: 0;
}

.page-faq .faq-sec--cinnabar {
  --sec-accent: var(--cinnabar-600);
}

.page-faq .faq-sec--celadon {
  --sec-accent: var(--celadon-500);
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--hair-strong);
}

.page-faq .faq-sec__num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: 26px;
  letter-spacing: 0.04em;
  color: var(--sec-accent);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-faq .faq-sec__lede {
  max-width: 62ch;
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 24px;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  background: var(--ink-900);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--hair);
  border-left: 3px solid rgba(154, 170, 185, 0.32);
  border-radius: var(--radius);
  background: var(--ink-800);
  transition: border-color 0.16s ease, background-color 0.16s ease, transform 0.16s ease;
}

.page-faq .faq-item:hover {
  border-color: var(--hair-strong);
  transform: translateY(-2px);
}

.page-faq .faq-item[open] {
  background: var(--ink-700);
  border-left-color: var(--sec-accent);
  transform: none;
}

.page-faq .faq-item__q {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

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

.page-faq .faq-item__no {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sec-accent);
}

.page-faq .faq-item__q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.4;
  color: var(--text-muted);
}

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

.page-faq .faq-item__a {
  padding: 0 16px 16px;
}

.page-faq .faq-item__a > p {
  max-width: 68ch;
  margin: 0 0 12px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(234, 240, 246, 0.86);
}

.page-faq .faq-item__a > p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
  max-width: 100%;
}

.page-faq .faq-ref {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--sec-accent);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--sec-accent);
}

.page-faq .faq-ref .link-more,
.page-faq .link-more-wrap .link-more {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .faq-copy {
  padding: 4px 10px;
  border: 1px dashed var(--hair-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--copper-300);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-faq .faq-copy:hover {
  border-color: var(--copper-300);
  color: var(--text-primary);
}

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

.page-faq .faq-copy[data-copy-state="done"] {
  border-style: solid;
  border-color: var(--celadon-500);
  color: var(--celadon-500);
}

/* ---------- 空状态 ---------- */
.page-faq .faq-empty {
  margin: 0 0 24px;
  padding: 20px;
  border: 1px dashed var(--hair-strong);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-contact {
  max-width: 620px;
  margin: 0 0 22px;
}

.page-faq .faq-contact .meta-list__row {
  border-bottom: 1px solid var(--hair);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 60px);
    overflow-y: auto;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 1px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__item {
    flex: none;
  }

  .page-faq .faq-rail__link {
    white-space: normal;
    padding: 10px 12px;
  }

  .page-faq .faq-sec__num {
    font-size: 34px;
  }

  .page-faq .faq-item__q {
    font-size: 17px;
    padding: 17px 20px;
  }

  .page-faq .faq-item__a {
    padding: 0 20px 20px;
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-hero {
    padding-top: calc(var(--header-h) + 22px);
    padding-bottom: 32px;
  }

  .page-faq .faq-hero__index {
    font-size: 92px;
    opacity: 0.7;
  }

  .page-faq .faq-filter {
    padding: 14px 14px 12px;
  }

  .page-faq .faq-layout {
    padding-bottom: 64px;
  }

  .page-faq .faq-sec {
    margin-bottom: 42px;
  }

  .page-faq .faq-item__q {
    gap: 9px;
    padding: 14px 14px;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding: 0 14px 14px;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-rail__link,
  .page-faq .faq-copy {
    transition: none;
  }

  .page-faq .faq-item:hover {
    transform: none;
  }
}
<<<END>>>