.page-faq {
  color: var(--ink);
  background: var(--bg);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 40px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  left: -25%;
  right: -25%;
  height: 78%;
  background: linear-gradient(118deg, rgba(122, 92, 255, .30), rgba(43, 227, 198, .14) 52%, rgba(7, 11, 20, 0) 78%);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__copy .eyebrow {
  margin: 18px 0 0;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(32px, 8vw, 62px);
  line-height: 1.08;
  letter-spacing: -.03em;
  font-weight: 900;
}

.page-faq .faq-hero .lead {
  margin: 20px 0 0;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-figures {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 36px;
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-faq .faq-figures li {
  display: grid;
  gap: 4px;
}

.page-faq .faq-figures b {
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-faq .faq-figures span {
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}

/* ---------- 分组索引条 ---------- */

.page-faq .faq-index {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  overflow-x: auto;
  background: rgba(7, 11, 20, .95);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.page-faq .faq-index__track {
  display: flex;
  gap: 10px;
  padding: 12px var(--gut);
  min-width: max-content;
}

.page-faq .faq-index__track a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-index__track a .mono {
  font-size: 12px;
  color: var(--dim);
  transition: color .2s var(--ease);
}

.page-faq .faq-index__track a:hover,
.page-faq .faq-index__track a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(198, 255, 61, .08);
}

.page-faq .faq-index__track a:hover .mono,
.page-faq .faq-index__track a:focus-visible .mono {
  color: var(--lime);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  border-top: 1px solid var(--line);
  scroll-margin-top: 76px;
}

.page-faq .faq-group:first-of-type {
  border-top: 0;
}

.page-faq .faq-group__grid {
  display: grid;
  gap: 22px;
  padding: 40px 0 48px;
}

.page-faq .faq-group__head .num {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-group__head h2 {
  margin: 0 0 10px;
  font-size: 26px;
  line-height: 1.2;
  letter-spacing: -.02em;
}

.page-faq .faq-group__head p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 单条问答 ---------- */

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

.page-faq .qa:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .qa summary {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 18px 16px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
  transition: color .2s var(--ease);
}

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

.page-faq .qa summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 2px;
  height: calc(100% - 22px);
  border-radius: 2px;
  background: var(--lime);
  transform: translateY(-50%) scaleY(0);
  transition: transform .25s var(--ease);
}

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

.page-faq .qa[open] summary {
  color: var(--lime);
}

.page-faq .qa[open] summary::before {
  transform: translateY(-50%) scaleY(1);
}

.page-faq .qa__arrow {
  flex: none;
  width: 11px;
  height: 11px;
  margin-top: -4px;
  border-right: 2px solid var(--dim);
  border-bottom: 2px solid var(--dim);
  transform: rotate(45deg);
  transition: transform .25s var(--ease), border-color .2s var(--ease);
}

.page-faq .qa[open] .qa__arrow {
  margin-top: 4px;
  border-color: var(--lime);
  transform: rotate(225deg);
}

.page-faq .qa__a {
  padding: 0 0 20px 16px;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  opacity: .82;
}

/* ---------- 数字强调 ---------- */

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 34px;
  margin: 24px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-faq .faq-facts li {
  display: grid;
  gap: 4px;
}

.page-faq .faq-facts b {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--lime);
}

.page-faq .faq-facts span {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 内链 ---------- */

.page-faq .qa-link {
  display: inline-block;
  margin-top: 22px;
  padding-bottom: 3px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .35);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .qa-link:hover,
.page-faq .qa-link:focus-visible {
  color: var(--fog);
  border-color: var(--orange);
}

/* ---------- 版本切换 ---------- */

.page-faq .faq-versions {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-versions__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .faq-versions .switch__btn {
  cursor: pointer;
}

.page-faq .faq-versions .switch__btn[aria-pressed="true"] {
  border-color: var(--lime);
  color: var(--lime);
}

.page-faq .faq-versions__panels {
  display: grid;
  gap: 20px;
}

.page-faq .faq-versions[data-value="base"] .faq-vpanel--plus,
.page-faq .faq-versions[data-value="plus"] .faq-vpanel--base {
  display: none;
}

.page-faq .faq-vpanel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
}

.page-faq .faq-vpanel h3 {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.4;
  letter-spacing: -.01em;
}

.page-faq .faq-vpanel--plus h3 {
  color: var(--violet);
}

.page-faq .faq-vpanel--base h3 {
  color: var(--cyan);
}

.page-faq .faq-vpanel ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-vpanel li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-vpanel li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--dim);
}

.page-faq .faq-vpanel--plus li::before {
  background: var(--violet);
}

.page-faq .faq-vpanel--base li::before {
  background: var(--cyan);
}

/* ---------- 服务步骤 ---------- */

.page-faq .faq-steps {
  display: grid;
  gap: 24px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-steps ol {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-steps li .mono {
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-faq .faq-steps .media {
  margin: 0;
}

.page-faq .faq-steps .media__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-index__track {
    padding-left: max(var(--gut), calc((100% - var(--maxw)) / 2));
    padding-right: max(var(--gut), calc((100% - var(--maxw)) / 2));
  }

  .page-faq .faq-versions__panels {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .page-faq .faq-steps {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 56px 0 64px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
  }

  .page-faq .faq-group__grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 56px;
    padding: 56px 0 64px;
  }

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

  .page-faq .qa summary {
    font-size: 17px;
    padding: 20px 0 20px 18px;
  }

  .page-faq .qa__a {
    padding-left: 18px;
  }

  .page-faq .faq-facts b {
    font-size: 26px;
  }
}