.page-faq {
  --faq-hair: rgba(91, 107, 124, .18);
  --faq-hair-strong: rgba(91, 107, 124, .34);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--faq-hair);
  padding: clamp(26px, 5vw, 58px) 0 clamp(30px, 5vw, 60px);
  background: linear-gradient(180deg, rgba(201, 162, 39, .08) 0%, rgba(247, 245, 240, 0) 62%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 88px 88px;
  pointer-events: none;
}

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

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 22ch;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(29px, 5.2vw, 50px);
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 58ch;
  color: var(--text-body);
}

.page-faq .faq-facts {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-facts li {
  background: var(--porcelain);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .faq-facts__num {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--cinnabar);
}

.page-faq .faq-facts__key {
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-muted);
}

@media (min-width: 720px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding-top: clamp(28px, 5vw, 52px);
  padding-bottom: clamp(10px, 2vw, 22px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  border-bottom: 1px solid var(--faq-hair);
  padding-bottom: 22px;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--text-muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.4;
  color: var(--text-body);
  text-decoration: none;
  transition: color .22s var(--ease), border-color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 12px;
  color: var(--slate);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
  background: rgba(200, 64, 47, .06);
  outline: none;
}

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

.page-faq .faq-index__figure {
  display: none;
  margin: 28px 0 0;
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 100px;
    border-bottom: 0;
    border-right: 1px solid var(--faq-hair);
    padding: 0 24px 0 0;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-faq .faq-index__link {
    display: flex;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 9px 0 9px 14px;
  }

  .page-faq .faq-index__figure {
    display: block;
  }
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(30px, 4.5vw, 54px);
  padding-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: baseline;
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cinnabar);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.3;
  letter-spacing: -.005em;
  color: var(--ink);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 8px 0 0;
  max-width: 48ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-faq .faq-group__figure {
  margin: 20px 0 22px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-item {
  position: relative;
  border-top: 1px solid var(--faq-hair);
  background: transparent;
}

.page-faq .faq-item[open] {
  background: linear-gradient(90deg, rgba(63, 122, 106, .06), rgba(63, 122, 106, 0) 64%);
}

.page-faq .faq-item[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--celadon);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 6px 15px 15px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary::after {
  content: "＋";
  margin-left: auto;
  flex: 0 0 auto;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--cinnabar);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: -2px;
}

.page-faq .faq-item__body {
  padding: 0 6px 18px 15px;
}

.page-faq .faq-item[open] .faq-item__body {
  animation: faq-body-in .26s var(--ease) both;
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-body);
}

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

.page-faq .faq-item__body a {
  color: var(--cinnabar-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(142, 43, 32, .35);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-item__body a:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-faq .faq-item__body mark {
  background: linear-gradient(transparent 58%, var(--gold-light) 58%);
  color: inherit;
  padding: 0 1px;
}

.page-faq .faq-item__body .mono {
  color: var(--ink);
  font-weight: 600;
}

@keyframes faq-body-in {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 底部引导 ---------- */
.page-faq .faq-cta {
  padding: clamp(34px, 5vw, 60px) 0 clamp(40px, 6vw, 76px);
}

.page-faq .faq-cta__card {
  padding: clamp(22px, 4vw, 40px);
}

.page-faq .faq-cta__card h2 {
  margin: 8px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.32;
  color: var(--ink);
}

.page-faq .faq-cta__card > p {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-body);
}

.page-faq .faq-cta__contact {
  list-style: none;
  margin: 22px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--faq-hair);
  display: grid;
  gap: 10px;
}

.page-faq .faq-cta__contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .faq-cta__contact .k {
  flex: 0 0 auto;
  min-width: 4.5em;
  font-size: 13px;
  color: var(--text-muted);
}

.page-faq .faq-cta__contact .v {
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-cta__contact li:nth-child(1) .v,
.page-faq .faq-cta__contact li:nth-child(2) .v {
  font-family: var(--font-mono);
  font-size: 13.5px;
}

@media (min-width: 640px) {
  .page-faq .faq-cta__contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }
}

.page-faq .faq-cta__actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-cta__status {
  margin: 20px 0 0;
  flex-wrap: wrap;
}

.page-faq .faq-cta__status .mono {
  font-weight: 600;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__body {
    animation: none;
  }

  .page-faq .faq-item summary,
  .page-faq .faq-item summary::after,
  .page-faq .faq-index__link,
  .page-faq .faq-item__body a {
    transition: none;
  }
}