.page-faq {
  --faq-line: rgba(31, 58, 77, 0.16);
  --faq-line-strong: rgba(31, 58, 77, 0.28);
  --faq-ink-soft: rgba(23, 32, 38, 0.82);
  display: block;
  background: var(--sand-light);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(168deg, var(--sand-light) 0%, var(--sand-light) 58%, var(--sand-mid) 100%);
  padding: 28px 0 44px;
}

.page-faq .faq-hero-shape {
  position: absolute;
  right: -8%;
  bottom: -34%;
  width: 64%;
  height: 86%;
  background: var(--mist-wash);
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.72;
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero-copy .crumbs {
  font-size: 0.8125rem;
  color: var(--mist-mid);
}

.page-faq .faq-hero-copy .crumbs a {
  color: var(--mist-mid);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-line-strong);
  padding-bottom: 1px;
}

.page-faq .faq-hero-copy .crumbs a:hover {
  color: var(--signal);
  border-color: var(--signal);
}

.page-faq .crumb-sep {
  margin: 0 8px;
  color: var(--mist-light);
}

.page-faq .crumb-current {
  color: var(--mist-deep);
  font-weight: 600;
}

.page-faq .faq-hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--signal);
  margin: 22px 0 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 5.4vw, 3rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--mist-deep);
  margin: 12px 0 0;
  max-width: 22ch;
}

.page-faq .faq-hero-lede {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.9;
  color: var(--faq-ink-soft);
  margin: 18px 0 0;
  max-width: 46ch;
}

.page-faq .faq-hero-note {
  background: var(--paper);
  border: 2px solid var(--mist-deep);
  box-shadow: var(--shadow-hard);
  padding: 18px 20px 20px;
}

.page-faq .faq-note-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--mist-mid);
  margin: 0;
}

.page-faq .faq-note-list {
  list-style: none;
  counter-reset: faqnote;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .faq-note-list li {
  counter-increment: faqnote;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-note-list li:first-child {
  border-top: 0;
}

.page-faq .faq-note-list a {
  display: flex;
  gap: 10px;
  padding: 11px 0;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--mist-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-note-list a::before {
  content: "0" counter(faqnote);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--signal);
  padding-top: 4px;
}

.page-faq .faq-note-list a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 30px;
  padding: 40px 0 68px;
}

/* ---------- 索引 ---------- */
.page-faq .faq-index-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--mist-mid);
  margin: 0 0 10px;
}

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

.page-faq .faq-index-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
  padding: 9px 15px;
  border: 1px solid var(--faq-line-strong);
  border-radius: 999px;
  background: var(--paper);
  color: var(--mist-deep);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--mist-light);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  background: var(--mist-deep);
  border-color: var(--mist-deep);
  color: var(--paper);
}

.page-faq .faq-index-link:hover .faq-index-num,
.page-faq .faq-index-link:focus-visible .faq-index-num {
  color: var(--signal);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-top: 42px;
  padding-top: 32px;
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

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

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--signal);
  flex: none;
}

.page-faq .faq-group-title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3.6vw, 1.7rem);
  font-weight: 700;
  line-height: 1.28;
  color: var(--mist-deep);
  margin: 0;
}

.page-faq .faq-group-lede {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--sand-deep);
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--faq-ink-soft);
  max-width: 62ch;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 24px 0 4px;
}

.page-faq .faq-figure .figure-frame {
  border: 2px solid var(--mist-deep);
  box-shadow: var(--shadow-sand);
  background: var(--mist-wash);
  overflow: hidden;
}

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

.page-faq .faq-figure .figure-cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mist-mid);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-items {
  margin-top: 22px;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 17px 12px 17px 6px;
  cursor: pointer;
  list-style: none;
  transition: background 0.2s var(--ease);
}

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

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

.page-faq .faq-item-q:hover {
  background: rgba(201, 221, 228, 0.42);
}

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

.page-faq .faq-item-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--mist-light);
  min-width: 2.4em;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-item-text {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--mist-deep);
  word-break: break-word;
}

.page-faq .faq-item-mark {
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
}

.page-faq .faq-item-mark::before,
.page-faq .faq-item-mark::after {
  content: "";
  position: absolute;
  background: var(--mist-mid);
  transition: transform 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .faq-item-mark::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-faq .faq-item-mark::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
}

.page-faq .faq-item[open] > .faq-item-q {
  background: rgba(228, 207, 168, 0.34);
}

.page-faq .faq-item[open] > .faq-item-q .faq-item-num {
  color: var(--signal);
}

.page-faq .faq-item[open] > .faq-item-q .faq-item-mark::before {
  background: var(--signal);
}

.page-faq .faq-item[open] > .faq-item-q .faq-item-mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item-a {
  margin: 0 12px 22px 40px;
  padding-left: 16px;
  border-left: 2px solid var(--sand-deep);
}

.page-faq .faq-item-a p {
  margin: 0 0 10px;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--faq-ink-soft);
  max-width: 66ch;
}

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

.page-faq .faq-item-a a {
  color: var(--mist-mid);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--mist-light);
}

.page-faq .faq-item-a a:hover {
  color: var(--signal);
  text-decoration-color: var(--signal);
}

/* ---------- 联系行 ---------- */
.page-faq .faq-contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}

.page-faq .faq-contact-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--mist-mid);
}

.page-faq .faq-copy {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--mist-deep);
  background: var(--paper);
  border: 2px solid var(--mist-deep);
  padding: 7px 13px;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--sand-mid);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-copy:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--sand-mid);
}

.page-faq .faq-copy:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--sand-mid);
}

.page-faq .faq-copy.is-copied {
  background: var(--archive);
  border-color: var(--archive);
  color: var(--paper);
}

.page-faq .faq-copy-status {
  font-size: 0.8125rem;
  color: var(--archive);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-hero {
    padding: 22px 0 36px;
  }

  .page-faq .faq-hero-shape {
    right: -22%;
    bottom: -22%;
    width: 86%;
    height: 62%;
    opacity: 0.55;
  }

  .page-faq .faq-body {
    padding: 32px 0 56px;
  }

  .page-faq .faq-item-q {
    gap: 10px;
    padding: 15px 8px 15px 4px;
  }

  .page-faq .faq-item-num {
    min-width: 2em;
    font-size: 0.75rem;
  }

  .page-faq .faq-item-text {
    font-size: 1rem;
  }

  .page-faq .faq-item-a {
    margin: 0 8px 20px 26px;
    padding-left: 12px;
  }

  .page-faq .faq-copy {
    font-size: 0.8125rem;
    padding: 6px 10px;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 940px) {
  .page-faq .faq-hero {
    padding: 40px 0 60px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(250px, 0.88fr);
    align-items: end;
    gap: 46px;
  }

  .page-faq .faq-hero-note {
    padding: 22px 24px 24px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding: 52px 0 84px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
    padding-bottom: 0;
  }

  .page-faq .faq-index-link {
    border-radius: 0;
    border-left: 3px solid transparent;
    padding: 10px 12px;
    background: transparent;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    background: var(--mist-deep);
    border-left-color: var(--signal);
  }

  .page-faq .faq-figure {
    margin: 26px 0 4px;
    max-width: 760px;
  }
}