.page-faq {
  --faq-gap: clamp(40px, 6vw, 76px);
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .crumbs__sep {
  margin: 0 .5em;
  color: var(--on-dark-faint);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  overflow: hidden;
}

.page-faq .faq-hero__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
}

.page-faq .faq-hero__copy .lede {
  max-width: 56ch;
  margin-top: 18px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* 响应概况面板 */
.page-faq .faq-stats {
  border: 1px solid var(--line-dark);
  border-top: 2px solid var(--gold);
  background: linear-gradient(170deg, var(--ink-2), var(--ink) 70%);
  border-radius: 3px;
  padding: 20px 22px;
}

.page-faq .faq-stats__label {
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--on-dark-faint);
  text-transform: uppercase;
  margin: 0 0 6px;
}

.page-faq .faq-stats__row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-stats__row:first-of-type {
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-stats__num {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--gold);
  white-space: nowrap;
}

.page-faq .faq-stats__txt {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

/* 分类索引条 */
.page-faq .faq-index {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(34px, 5vw, 58px);
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  border-radius: 3px;
  overflow: hidden;
}

.page-faq .faq-index__item {
  display: block;
  padding: 20px 18px;
  background: var(--ink);
  text-decoration: none;
  color: var(--on-dark);
  transition: background var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  background: var(--ink-2);
  box-shadow: inset 0 -2px 0 var(--gold);
}

.page-faq .faq-index__letter {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: .18em;
  padding-bottom: 6px;
  margin-bottom: 10px;
  border-bottom: 1px solid currentColor;
}

.page-faq .faq-index__item:nth-child(1) .faq-index__letter { color: var(--gold); }
.page-faq .faq-index__item:nth-child(2) .faq-index__letter { color: var(--volt-soft); }
.page-faq .faq-index__item:nth-child(3) .faq-index__letter { color: var(--volt); }
.page-faq .faq-index__item:nth-child(4) .faq-index__letter { color: var(--mute); }

.page-faq .faq-index__name {
  display: block;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 4px;
}

.page-faq .faq-index__desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark-faint);
}

/* ---------- 图版 ---------- */
.page-faq .faq-plate {
  margin: 0 auto clamp(38px, 5vw, 66px);
  max-width: 960px;
}

.page-faq .faq-plate img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper);
}

.page-faq .faq-plate__cap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mute);
}

.page-faq .faq-plate--dark img {
  border-color: var(--line-dark-2);
  background: var(--ink);
}

.page-faq .faq-plate--dark .faq-plate__cap {
  color: var(--on-dark-faint);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 78px);
  padding-top: clamp(32px, 4vw, 52px);
  border-top: 1px solid var(--rule);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .faq-group__letter {
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--volt-deep);
}

.page-faq .faq-group__title {
  margin: 0 0 10px;
  transition: color var(--t) var(--ease);
}

.page-faq .faq-group__intro {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

.page-faq .faq-group:target .faq-group__letter,
.page-faq .faq-group:target .faq-group__title {
  color: var(--gold-deep);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--rule);
}

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

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 34px 1fr 18px;
  gap: 10px;
  align-items: start;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  transition: color var(--t) var(--ease);
}

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

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

.page-faq .faq-item__num {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mute);
  padding-top: 5px;
}

.page-faq .faq-item__q {
  display: block;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: -.01em;
  color: var(--ink);
  transition: color var(--t) var(--ease);
}

.page-faq .faq-item:hover .faq-item__q {
  color: var(--volt-deep);
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--ink);
}

.page-faq .faq-item__sign {
  position: relative;
  display: block;
  width: 14px;
  height: 14px;
  margin-top: 6px;
  justify-self: end;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  top: calc(50% - 1px);
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--mute);
  transition: transform var(--t-slow) var(--ease), background var(--t) var(--ease);
}

.page-faq .faq-item__sign::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: rotate(0deg);
}

.page-faq .faq-item:hover .faq-item__sign::before,
.page-faq .faq-item:hover .faq-item__sign::after,
.page-faq .faq-item[open] .faq-item__sign::before,
.page-faq .faq-item[open] .faq-item__sign::after {
  background: var(--gold);
}

.page-faq .faq-item__a {
  padding: 0 0 24px;
  max-width: 76ch;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mute);
}

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

.page-faq .faq-path {
  font-family: var(--font-mono);
  font-size: .86em;
  letter-spacing: .02em;
  color: var(--volt-deep);
  background: rgba(45, 99, 245, .07);
  border: 1px solid rgba(45, 99, 245, .22);
  border-radius: 2px;
  padding: 1px 6px;
  overflow-wrap: anywhere;
}

/* ---------- 排查路线 ---------- */
.page-faq .faq-route__head {
  max-width: 62ch;
  margin-bottom: clamp(30px, 4vw, 50px);
}

.page-faq .faq-route__head .prose {
  margin-top: 14px;
  color: var(--on-dark-soft);
}

.page-faq .route {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-faq .route__node {
  background: var(--ink);
  border: 1px solid var(--line-dark);
  border-radius: 3px;
  padding: 22px 20px;
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-faq .route__node:hover,
.page-faq .route__node:focus-within {
  border-color: var(--gold-deep);
  box-shadow: var(--sh-2);
}

.page-faq .route__step {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
  padding-bottom: 8px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line-dark-2);
}

.page-faq .route__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--on-dark);
}

.page-faq .route__lede {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

.page-faq .route__hint {
  list-style: none;
  margin: 14px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--line-dark-2);
  display: grid;
  gap: 7px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-faint);
}

.page-faq .route__hint li {
  padding-left: 14px;
  position: relative;
}

.page-faq .route__hint li::before {
  content: "";
  position: absolute;
  top: .68em;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--volt);
}

.page-faq .faq-route__foot {
  margin-top: clamp(28px, 4vw, 44px);
  max-width: 70ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-dark-faint);
}

.page-faq .faq-route__foot a {
  color: var(--volt-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--t) var(--ease);
}

.page-faq .faq-route__foot a:hover {
  color: var(--gold);
}

/* ---------- 转人工 ---------- */
.page-faq .faq-handoff__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4vw, 56px);
  align-items: start;
}

.page-faq .faq-handoff__lead .prose {
  margin-top: 16px;
  color: var(--on-dark-soft);
  max-width: 56ch;
}

.page-faq .faq-handoff__tips {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-handoff__tips li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

.page-faq .faq-handoff__tips .mono {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
  padding-top: 3px;
}

.page-faq .faq-handoff__note {
  margin-top: 24px;
  font-size: 13.5px;
  color: var(--on-dark-faint);
}

.page-faq .faq-handoff__note a {
  color: var(--volt-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--t) var(--ease);
}

.page-faq .faq-handoff__note a:hover {
  color: var(--gold);
}

.page-faq .faq-channel {
  padding: 24px 22px 26px;
  border-top: 2px solid var(--gold);
  background: linear-gradient(180deg, var(--ink-2), var(--ink) 78%);
}

.page-faq .faq-channel__list {
  margin: 16px 0 22px;
}

.page-faq .faq-channel__list dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--gold);
  margin-bottom: 4px;
}

.page-faq .faq-channel__list dd {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--on-dark);
  overflow-wrap: anywhere;
}

.page-faq .faq-channel__list dd:last-child {
  margin-bottom: 0;
}

.page-faq .faq-channel .btn {
  width: 100%;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq .faq-item__a {
    padding-left: 44px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__split {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }

  .page-faq .faq-group__head {
    grid-template-columns: 84px 1fr;
    gap: 26px;
  }

  .page-faq .faq-group__letter {
    padding-top: 8px;
    border-top: 2px solid var(--gold);
    border-bottom: 0;
  }

  .page-faq .route {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .page-faq .route__node {
    position: relative;
  }

  .page-faq .route__node:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 36px;
    right: -28px;
    width: 28px;
    border-top: 1px dashed var(--line-dark-2);
  }

  .page-faq .faq-handoff__grid {
    grid-template-columns: 1fr 380px;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(4, 1fr);
  }
}