.page-faq,
.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .breadcrumb {
  padding: 26px 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .kb-hero {
  display: grid;
  gap: 26px;
  padding: 18px 0 34px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .kb-hero h1 {
  margin: 14px 0 16px;
  font-family: var(--font-cn);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 52px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .kb-hero .lede {
  margin: 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .kb-hero__figure {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 26px 0 0;
}

.page-faq .kb-hero__figure .figure {
  font-family: var(--font-mono);
  font-size: clamp(64px, 13vw, 118px);
  line-height: .88;
  letter-spacing: -.05em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-faq .kb-hero__unit {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .kb-hero__media {
  border-radius: var(--r-xl);
  overflow: hidden;
}

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

/* ---------- 常用检索词 ---------- */
.page-faq .kb-search {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--grid);
}

.page-faq .kb-search__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .kb-search__terms {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .kb-search__terms a {
  display: inline-block;
  padding: 6px 15px;
  border: 1px solid var(--grid);
  border-radius: var(--pill);
  font-size: 14px;
  color: var(--cyan-soft);
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .kb-search__terms a:hover,
.page-faq .kb-search__terms a:focus-visible {
  background: var(--wash);
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---------- 双列骨架 ---------- */
.page-faq .kb-body {
  display: grid;
  gap: 26px;
  padding-top: 30px;
}

/* ---------- 分类索引轨道 ---------- */
.page-faq .kb-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-faq .kb-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .kb-rail__item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-width: 186px;
  padding: 13px 16px 13px 22px;
  border-radius: var(--r-md);
  background: var(--panel);
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .kb-rail__item::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 50%;
  width: 4px;
  height: 0;
  border-radius: 2px;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: height var(--dur) var(--ease);
}

.page-faq .kb-rail__item:hover,
.page-faq .kb-rail__item:focus-visible {
  background: var(--wash);
}

.page-faq .kb-rail__item:hover::before,
.page-faq .kb-rail__item:focus-visible::before,
.page-faq .kb-rail__item[aria-current]::before {
  height: 22px;
}

.page-faq .kb-rail__item[aria-current] {
  background: var(--wash);
  color: var(--cyan-soft);
}

.page-faq .kb-rail__count {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--mist);
}

.page-faq .kb-rail__item[aria-current] .kb-rail__count {
  color: var(--orange);
}

.page-faq .kb-rail__note {
  display: none;
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 章节 ---------- */
.page-faq .kb-section {
  padding: 30px 0 6px;
  border-top: 1px solid var(--grid);
}

.page-faq .kb-section:first-child {
  padding-top: 4px;
  border-top: 0;
}

.page-faq .kb-section__head h2 {
  margin: 10px 0 12px;
  font-family: var(--font-cn);
  font-weight: 900;
  font-size: clamp(22px, 5vw, 30px);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .kb-section__head p {
  margin: 0 0 6px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 字段表 ---------- */
.page-faq .kb-table {
  margin: 22px 0 8px;
  font-size: 14px;
}

.page-faq .kb-table caption {
  padding-bottom: 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-faq .kb-table td,
.page-faq .kb-table th {
  font-variant-numeric: tabular-nums;
}

/* ---------- 图 ---------- */
.page-faq .kb-figure {
  margin: 22px 0 10px;
}

.page-faq .kb-figure .media-frame {
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

.page-faq .kb-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid rgba(42, 74, 64, .7);
  border-radius: var(--r-md);
  background: var(--panel);
  overflow: hidden;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa[open] {
  background: var(--panel-2);
  border-color: var(--cyan);
}

.page-faq .qa__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__head:hover {
  background: var(--wash);
}

.page-faq .qa__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .qa__tag {
  flex: none;
  padding: 3px 11px;
  border: 1px solid var(--grid);
  border-radius: var(--pill);
  font-size: 12px;
  color: var(--mist);
  white-space: nowrap;
}

.page-faq .qa[open] .qa__tag {
  border-color: var(--cyan);
  color: var(--cyan-soft);
  background: var(--wash);
}

.page-faq .qa__body {
  padding: 0 16px 18px;
  border-top: 1px solid var(--grid);
}

.page-faq .qa__body p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .qa__body strong {
  color: var(--cyan-soft);
  font-weight: 600;
}

/* ---------- 段内指引 ---------- */
.page-faq .kb-inline-link {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .kb-inline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 192, .4);
}

.page-faq .kb-inline-link a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 底部指引 ---------- */
.page-faq .kb-next {
  margin-top: 28px;
  padding: 28px 22px;
  border: 1px solid var(--grid);
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, var(--panel-2), var(--ink) 78%);
}

.page-faq .kb-next h2 {
  margin: 0 0 12px;
  font-family: var(--font-cn);
  font-weight: 900;
  font-size: clamp(20px, 4.4vw, 26px);
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .kb-next__lead {
  margin: 0 0 18px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .kb-next__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.page-faq .kb-next__contact .copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border: 1px solid var(--grid);
  border-radius: var(--pill);
  background: var(--wash);
}

.page-faq .kb-next__contact .copy-chip__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-faq .kb-next__contact .copy-chip__val {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .kb-next__links {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .kb-next__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: var(--panel);
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .kb-next__links a:hover,
.page-faq .kb-next__links a:focus-visible {
  background: var(--wash);
  color: var(--cyan-soft);
}

.page-faq .kb-next__arrow {
  font-family: var(--font-mono);
  color: var(--cyan);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-faq .kb-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: end;
    gap: 34px;
    padding-bottom: 44px;
  }

  .page-faq .kb-hero h1 {
    font-size: clamp(38px, 4.6vw, 54px);
  }

  .page-faq .kb-rail__note {
    display: block;
  }

  .page-faq .kb-next {
    padding: 34px 32px;
  }

  .page-faq .kb-next__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .kb-next__links a {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    min-height: 106px;
  }
}

/* ---------- 桌面：左轨道 + 右列表 ---------- */
@media (min-width: 1024px) {
  .page-faq .kb-body {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: 46px;
    padding-top: 40px;
  }

  .page-faq .kb-rail {
    position: sticky;
    top: 34px;
    align-self: start;
  }

  .page-faq .kb-rail__list {
    flex-direction: column;
    gap: 6px;
    padding: 0;
    overflow: visible;
  }

  .page-faq .kb-rail__item {
    min-width: 0;
  }

  .page-faq .kb-table {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .kb-rail__item,
  .page-faq .kb-rail__item::before,
  .page-faq .qa,
  .page-faq .kb-next__links a {
    transition: none;
  }
}