.page-faq {
  --faq-rail-w: 208px;
  --faq-ink: var(--ink-950);
  --faq-dim: var(--slate-500);
  background-color: var(--paper-50);
  color: var(--slate-700);
  padding-bottom: clamp(64px, 10vw, 120px);
  font-family: var(--font-body);
}

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

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 26px 0 6px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--faq-dim);
}

.page-faq .faq-crumbs a {
  color: var(--moss-700);
  text-decoration: none;
  border-bottom: 1px solid var(--moss-200);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-crumbs a:hover {
  color: var(--ink-950);
  border-bottom-color: var(--gold-500);
}

.page-faq .faq-crumbs .is-current {
  color: var(--ink-950);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 18px 0 0;
}

.page-faq .faq-hero .eyebrow {
  display: inline-block;
  margin: 0;
  padding-bottom: 6px;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--moss-700);
  border-bottom: 1px solid var(--gold-500);
}

.page-faq .faq-hero h1 {
  margin: 22px 0 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.3rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--faq-ink);
}

.page-faq .faq-hero .lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--slate-700);
}

.page-faq .faq-hero__marks {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__marks li {
  padding-left: 14px;
  border-left: 2px solid var(--gold-500);
  font-size: 13px;
  line-height: 1.6;
  color: var(--faq-dim);
}

.page-faq .faq-hero__marks .num {
  margin-right: 5px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-banner {
  position: relative;
  margin: 32px 0 0;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--moss-200);
  border-radius: var(--radius-soft);
  background-color: var(--ink-950);
  overflow: hidden;
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
}

/* ---------- 分类卡 ---------- */
.page-faq .faq-cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 44px 0 0;
}

.page-faq .faq-cat {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-card);
  background-color: var(--moss-200);
  color: var(--ink-950);
  text-decoration: none;
  overflow: hidden;
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-cat::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -46px;
  width: 118px;
  height: 118px;
  border-radius: var(--blob);
  background-color: var(--moss-500);
  opacity: .2;
  pointer-events: none;
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translateY(-2px);
  border-color: var(--gold-500);
  box-shadow: 0 14px 28px rgba(11, 21, 18, .12);
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--moss-700);
}

.page-faq .faq-cat__title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-950);
}

.page-faq .faq-cat__desc {
  position: relative;
  z-index: 1;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate-700);
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin: 56px 0 0;
  align-items: start;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold-500);
}

.page-faq .faq-rail nav {
  display: flex;
  gap: 8px;
  padding-bottom: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail .rail-link {
  flex: 0 0 auto;
  padding: 9px 15px;
  border: 1px solid var(--moss-200);
  border-radius: 999px;
  background-color: var(--paper-200);
  color: var(--slate-700);
  font-size: 13.5px;
  line-height: 1.5;
  white-space: nowrap;
  text-decoration: none;
  transition: color .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-rail .rail-link:hover {
  border-color: var(--moss-500);
  color: var(--ink-950);
}

.page-faq .faq-rail .rail-link.is-current {
  border-color: var(--moss-700);
  background-color: var(--moss-700);
  color: var(--paper-50);
  font-weight: 600;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 92px;
}

.page-faq .faq-body > .faq-group:not(:first-child) {
  margin-top: 52px;
  padding-top: 46px;
  border-top: 1px solid var(--gold-500);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 8px;
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold-500);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--ink-950);
}

.page-faq .faq-group__note {
  margin: 0 0 6px;
  max-width: 58ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--faq-dim);
}

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-list {
  margin-top: 18px;
  border-top: 1px solid var(--moss-200);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--moss-200);
  box-shadow: inset 0 0 0 0 rgba(200, 162, 43, 0);
  transition: box-shadow .24s var(--ease);
}

.page-faq .faq-item[open] {
  box-shadow: inset 3px 0 0 0 var(--gold-500);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 17px 0 17px 16px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-950);
  cursor: pointer;
  list-style: none;
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--moss-500);
  transition: color .24s var(--ease);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
  color: var(--gold-500);
}

.page-faq .faq-item summary:hover {
  color: var(--moss-700);
}

.page-faq .faq-item__body {
  padding: 0 0 20px 16px;
  max-width: 64ch;
}

.page-faq .faq-item__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--slate-700);
}

.page-faq .faq-item__body a {
  color: var(--volt-600);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .faq-item__body a:hover {
  color: var(--moss-700);
}

/* ---------- 章节内插图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 24px;
  border: 1px solid var(--moss-200);
  border-radius: var(--radius-card);
  background-color: var(--ink-950);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--moss-200);
  background-color: var(--paper-200);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--faq-dim);
}

/* ---------- 中段提示块 ---------- */
.page-faq .faq-prompt {
  position: relative;
  margin: 48px 0;
  padding: 30px 24px 32px;
  border-radius: var(--radius-soft);
  background-image: linear-gradient(135deg, var(--ink-800), var(--ink-950) 64%);
  color: var(--paper-50);
  overflow: hidden;
}

.page-faq .faq-prompt::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(102deg, rgba(200, 162, 43, .16) 0 1px, transparent 1px 9px);
  pointer-events: none;
}

.page-faq .faq-prompt__kicker {
  position: relative;
  margin: 0;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold-500);
}

.page-faq .faq-prompt__title {
  position: relative;
  margin: 14px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--paper-50);
}

.page-faq .faq-prompt__text {
  position: relative;
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--moss-200);
}

.page-faq .faq-prompt__links {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin-top: 24px;
}

.page-faq .faq-prompt__link {
  display: inline-block;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--gold-500);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--gold-200);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-prompt__link:hover {
  color: var(--paper-50);
  border-bottom-color: var(--paper-50);
}

/* ---------- 联系区 ---------- */
.page-faq .faq-contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 20px;
  border: 1px solid var(--moss-200);
  border-radius: var(--radius-card);
  background-color: var(--paper-200);
  overflow: hidden;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--moss-200);
}

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

.page-faq .faq-contact__key {
  flex: 0 0 108px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--faq-dim);
}

.page-faq .faq-contact__val {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-950);
  word-break: break-word;
}

.page-faq .faq-contact__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

/* ---------- 交互与动效 ---------- */
.page-faq :focus-visible {
  outline: 3px solid var(--gold-500);
  outline-offset: 2px;
}

.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .26s var(--ease), transform .26s var(--ease);
}

.page-faq [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-faq .faq-cat,
  .page-faq .faq-item,
  .page-faq .faq-rail .rail-link {
    transition: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-banner {
    aspect-ratio: 12 / 5;
  }

  .page-faq .faq-prompt {
    padding: 36px 34px 38px;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact__row {
    border-bottom: 0;
    border-right: 1px solid var(--moss-200);
  }

  .page-faq .faq-contact__row:nth-child(2n) {
    border-right: 0;
  }

  .page-faq .faq-contact__row:nth-child(-n + 2) {
    border-bottom: 1px solid var(--moss-200);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding-top: 26px;
  }

  .page-faq .faq-hero .lede {
    max-width: 54ch;
  }

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

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 58px;
    margin-top: 68px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-rail nav {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail .rail-link {
    display: block;
    padding: 8px 0 8px 16px;
    border: 0;
    border-left: 2px solid var(--moss-200);
    border-radius: 0;
    background-color: transparent;
    font-size: 14px;
    white-space: normal;
  }

  .page-faq .faq-rail .rail-link:hover {
    border-left-color: var(--moss-500);
    background-color: transparent;
  }

  .page-faq .faq-rail .rail-link.is-current {
    border-left-color: var(--gold-500);
    background-color: transparent;
    color: var(--ink-950);
    font-weight: 700;
  }

  .page-faq .faq-item summary {
    padding: 19px 0 19px 18px;
    font-size: 16.5px;
  }

  .page-faq .faq-item__body {
    padding: 0 0 22px 18px;
  }

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

  .page-faq .faq-contact__row {
    display: block;
    border-right: 1px solid var(--moss-200);
    border-bottom: 0;
  }

  .page-faq .faq-contact__row:nth-child(2n) {
    border-right: 1px solid var(--moss-200);
  }

  .page-faq .faq-contact__row:nth-child(-n + 2) {
    border-bottom: 0;
  }

  .page-faq .faq-contact__row:last-child {
    border-right: 0;
  }

  .page-faq .faq-contact__key {
    display: block;
    flex: none;
    margin-bottom: 8px;
  }
}