.page-faq {
  --faq-index-w: 252px;
  --faq-gap: 24px;
}

.page-faq .faq-masthead {
  padding-top: 30px;
  padding-bottom: 26px;
}

.page-faq .faq-crumb-item {
  font-size: 13px;
}

.page-faq .faq-masthead .lede {
  max-width: 60ch;
  margin-top: 14px;
}

.page-faq .faq-jump {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line-hair);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-jump-label {
  flex: 0 0 auto;
  padding-right: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-jump-link {
  flex: 0 0 auto;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-hair);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color 180ms var(--ease-signal), background 180ms var(--ease-signal), border-color 180ms var(--ease-signal);
}

.page-faq .faq-jump-link:hover,
.page-faq .faq-jump-link:focus-visible {
  color: var(--on-cyan);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-bottom: 64px;
}

.page-faq .faq-main {
  min-width: 0;
}

/* 分类索引 */
.page-faq .faq-index {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line-hair);
  border-radius: var(--radius-m);
  background: var(--ink-800);
}

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

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

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

.page-faq .faq-index-item {
  flex: 0 0 auto;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  background: rgba(215, 227, 238, 0.05);
  color: var(--mist);
  font-size: 13px;
  white-space: nowrap;
  transition: transform 180ms var(--ease-signal), background 180ms var(--ease-signal), color 180ms var(--ease-signal), border-color 180ms var(--ease-signal);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--paper);
  background: rgba(46, 216, 198, 0.12);
  border-color: rgba(46, 216, 198, 0.4);
  transform: translateX(4px);
}

.page-faq .faq-index-note {
  margin: 12px 0 0;
  font-size: 12px;
  color: var(--mist);
}

/* 分组 */
.page-faq .faq-group {
  scroll-margin-top: 116px;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line-hair);
}

.page-faq .faq-group-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-group-title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(20px, 3.6vw, 26px);
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-group-count {
  flex: 0 0 auto;
  padding: 3px 9px;
  border: 1px solid var(--line-hair);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .faq-divider {
  height: 1px;
  margin: 30px 0;
  background-image: repeating-linear-gradient(to right, var(--line-hair) 0 16px, transparent 16px 28px);
}

/* 问题条目 */
.page-faq .faq-item {
  margin-top: 12px;
  border: 1px solid var(--line-hair);
  border-radius: var(--radius-m);
  background: var(--ink-800);
  transition: border-color 180ms var(--ease-signal), background 180ms var(--ease-signal);
}

.page-faq .faq-item[open] {
  border-color: rgba(46, 216, 198, 0.38);
  background: linear-gradient(158deg, rgba(46, 216, 198, 0.09), var(--ink-800) 62%);
}

.page-faq .faq-summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 48px;
  padding: 15px 46px 15px 16px;
  list-style: none;
  cursor: pointer;
}

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

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

.page-faq .faq-summary::after {
  content: "";
  position: absolute;
  top: 22px;
  right: 18px;
  width: 13px;
  height: 13px;
  background:
    linear-gradient(var(--cyan), var(--cyan)) center / 100% 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) center / 2px 100% no-repeat;
  transition: transform 220ms var(--ease-signal);
}

.page-faq .faq-item[open] .faq-summary::after {
  transform: rotate(45deg) scale(0.88);
}

.page-faq .faq-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 50%;
  border: 1px solid rgba(46, 216, 198, 0.55);
  background: transparent;
  transition: background 180ms var(--ease-signal), box-shadow 180ms var(--ease-signal);
}

.page-faq .faq-item[open] .faq-dot {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(46, 216, 198, 0.16);
}

.page-faq .faq-q-num {
  flex: 0 0 26px;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .faq-q-text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .faq-answer {
  padding: 0 16px 18px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-answer p {
  margin: 0 0 10px;
}

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

.page-faq .faq-answer a {
  color: var(--cyan-soft);
  border-bottom: 1px solid rgba(138, 243, 230, 0.4);
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* 步骤清单 */
.page-faq .faq-steps {
  margin: 10px 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 9px;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 34px;
  line-height: 1.7;
  counter-increment: faqstep;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(46, 216, 198, 0.35);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

/* 邮件标题示例 */
.page-faq .faq-mail-title {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-s);
  border: 1px dashed rgba(255, 122, 47, 0.55);
  background: rgba(255, 122, 47, 0.13);
  color: var(--signal-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* 图文分栏 */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
}

.page-faq .faq-figure {
  margin: 18px 0 0;
  max-width: 420px;
}

.page-faq .faq-shot {
  aspect-ratio: 9 / 7;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--line-hair);
  background: var(--ink-800);
}

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

.page-faq .faq-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .faq-banner {
  margin: 0 0 18px;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--line-hair);
}

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

/* 尾部入口 */
.page-faq .faq-foot {
  margin-top: 46px;
  padding: 22px;
  border: 1px solid var(--line-hair);
  border-radius: var(--radius-m);
  background: linear-gradient(140deg, rgba(46, 216, 198, 0.1), var(--ink-800) 58%);
}

.page-faq .faq-foot h2 {
  margin: 0 0 8px;
  font-family: var(--font-narrow);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-foot p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 桌面端 */
@media (min-width: 760px) {
  .page-faq .faq-summary {
    padding: 17px 50px 17px 20px;
  }

  .page-faq .faq-answer {
    padding: 0 24px 20px 58px;
    font-size: 15px;
  }

  .page-faq .faq-q-text {
    font-size: 17px;
  }

  .page-faq .faq-group-title {
    font-size: 27px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
    padding-bottom: 84px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    padding: 20px 14px;
  }

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

  .page-faq .faq-index-item {
    flex: 0 1 auto;
  }

  .page-faq .faq-index-link {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-s);
    background: transparent;
    font-size: 14px;
  }

  .page-faq .faq-index-num {
    font-size: 12px;
  }

  .page-faq .faq-divider {
    margin: 38px 0;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-figure {
    margin: 0;
    max-width: none;
  }

  .page-faq .faq-answer {
    padding-left: 74px;
  }
}

/* 索引高亮与滚动条收敛 */
.page-faq .faq-jump-link:focus-visible,
.page-faq .faq-index-link:focus-visible,
.page-faq .faq-summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-jump-link,
.page-faq .faq-index-link,
.page-faq .faq-summary::after {
  will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump-link,
  .page-faq .faq-index-link,
  .page-faq .faq-item,
  .page-faq .faq-dot,
  .page-faq .faq-summary::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}