.page-faq {
  --faq-card: #FFFFFF;
  --faq-rule: rgba(10, 12, 18, .12);
  --faq-text: #3D4557;
  --faq-muted: #6A7285;
  --faq-radius-xl: 22px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 8vw, 108px);
}

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

.page-faq .breadcrumb {
  padding-block: clamp(16px, 2.4vw, 26px) 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
  padding-block: clamp(22px, 3.4vw, 40px) clamp(30px, 4.4vw, 52px);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -.012em;
}

.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.82;
  color: var(--faq-text);
}

.page-faq .faq-figures {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3.6vw, 46px);
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--faq-rule);
  list-style: none;
}

.page-faq .faq-figure {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 96px;
}

.page-faq .faq-figure-num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.1vw, 1.75rem);
  font-weight: 700;
  line-height: 1;
  color: var(--navy);
}

.page-faq .faq-figure-unit {
  font-size: .68em;
  color: var(--orange);
  margin-left: 2px;
}

.page-faq .faq-figure-label {
  font-size: .8rem;
  color: var(--faq-muted);
}

.page-faq .faq-visual {
  margin: 0;
  border-radius: var(--faq-radius-xl);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--navy);
}

.page-faq .faq-visual .media-frame {
  display: block;
  border: 0;
  border-radius: 0;
}

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

.page-faq .faq-visual .media-frame-caption {
  padding: 12px 16px;
  color: #C9CED8;
  font-size: .8rem;
  line-height: 1.6;
  background: var(--night);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 38px);
  padding-top: clamp(30px, 4.4vw, 54px);
}

.page-faq .faq-index {
  min-width: 0;
  background: var(--night);
  border-radius: var(--radius);
  padding: 20px 18px;
  color: #C9CED8;
}

.page-faq .faq-index .chapter-toc-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index-list > li {
  flex: none;
}

.page-faq .faq-index .chapter-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 13px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: #C9CED8;
  font-size: .9rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color .22s var(--ease), background .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .faq-index .chapter-link:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, .07);
}

.page-faq .faq-index .chapter-link.is-active {
  color: #FFFFFF;
  border-left-color: var(--orange);
  background: rgba(255, 107, 26, .14);
}

.page-faq .faq-index-idx {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--orange);
  letter-spacing: .06em;
}

.page-faq .faq-index-help {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(201, 206, 216, .18);
}

.page-faq .faq-index-help p {
  margin: 0;
  font-size: .84rem;
  color: #98A1B2;
}

.page-faq .faq-index-cta {
  color: var(--lime);
  font-size: .84rem;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(198, 255, 46, .42);
}

.page-faq .faq-index-cta:hover {
  color: #FFFFFF;
  border-bottom-color: #FFFFFF;
}

/* ---------- 问答面板 ---------- */
.page-faq .faq-panels {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2.4vw, 26px);
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  min-width: 0;
  background: var(--faq-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(18px, 2.6vw, 30px);
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(18px, 2.6vw, 30px);
  bottom: clamp(18px, 2.6vw, 30px);
  width: 2px;
  border-radius: 0 2px 2px 0;
  background: linear-gradient(180deg, var(--orange), var(--blue));
}

.js .page-faq .faq-group[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
}

.js .page-faq .faq-group[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-group-idx {
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .1em;
  color: #FFFFFF;
  background: var(--navy);
  padding: 6px 9px;
  border-radius: 7px;
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.9vw, 1.45rem);
  line-height: 1.32;
}

.page-faq .faq-group-note {
  margin: 7px 0 0;
  font-size: .88rem;
  line-height: 1.65;
  color: var(--faq-muted);
}

.page-faq .faq-list {
  margin: 0;
}

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

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
  font-size: .97rem;
  font-weight: 600;
  line-height: 1.62;
  color: var(--ink);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item > summary:hover {
  color: var(--blue);
}

.page-faq .faq-item[open] > summary {
  color: var(--navy);
}

.page-faq .faq-mark {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  margin-top: 1px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  transition: background .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--ink);
  transition: transform .28s var(--ease), background .25s var(--ease);
}

.page-faq .faq-mark::before {
  width: 11px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-mark::after {
  width: 2px;
  height: 11px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-mark {
  background: var(--orange);
  border-color: var(--orange);
}

.page-faq .faq-item[open] .faq-mark::before,
.page-faq .faq-item[open] .faq-mark::after {
  background: #FFFFFF;
}

.page-faq .faq-item[open] .faq-mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

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

.page-faq .faq-answer p {
  margin: 0;
  max-width: 64ch;
  font-size: .93rem;
  line-height: 1.82;
  color: var(--faq-text);
}

.page-faq .faq-answer p + p {
  margin-top: 10px;
}

.page-faq .faq-answer a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-answer a:hover {
  color: var(--orange);
}

/* ---------- 纠错示意图 ---------- */
.page-faq .faq-figure-media {
  margin: 20px 0 0;
  padding-top: 20px;
  border-top: 1px dashed var(--line-strong);
}

.page-faq .faq-figure-media .media-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--mist);
}

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

.page-faq .faq-figure-media .media-frame-caption {
  margin-top: 10px;
  font-size: .82rem;
  line-height: 1.62;
  color: var(--faq-muted);
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-contact-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact-list .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--mist);
}

.page-faq .faq-contact-list .contact-label {
  flex: none;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--navy);
}

.page-faq .faq-contact-list .contact-value {
  flex: 1 1 180px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: .9rem;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .faq-contact-list .copy-btn {
  flex: none;
  margin-left: auto;
}

.page-faq .faq-contact-note {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .faq-contact-note a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-contact-note a:hover {
  color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-index {
    padding: 22px 20px;
  }

  .page-faq .faq-index-list {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-masthead {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 252px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-index-list > li {
    flex: 0 0 auto;
  }

  .page-faq .faq-index .chapter-link {
    white-space: normal;
  }
}

@media (max-width: 519px) {
  .page-faq .faq-group-idx {
    padding: 5px 7px;
    font-size: .68rem;
  }

  .page-faq .faq-item > summary {
    font-size: .93rem;
  }

  .page-faq .faq-contact-list .contact-value {
    flex-basis: 100%;
    order: 3;
  }

  .page-faq .faq-contact-list .copy-btn {
    margin-left: 0;
  }
}