.page-faq {
  --kb-line: rgba(10, 27, 46, 0.12);
  --kb-line-soft: rgba(10, 27, 46, 0.08);
  --kb-radius: 6px;
  background: var(--paper);
  color: var(--body-ink);
  font-family: var(--sans);
}

.page-faq :focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .breadcrumbs {
  padding-top: 22px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq .breadcrumbs a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .breadcrumbs a:hover {
  color: var(--ink);
  border-bottom-color: var(--amber);
}

/* ---------- 首屏框景 ---------- */
.page-faq .kb-hero {
  padding: 20px 0 8px;
}

.page-faq .kb-hero__frame {
  position: relative;
  border: 1px solid rgba(10, 27, 46, 0.18);
  border-radius: 10px;
  padding: 28px 20px 24px;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(63, 169, 160, 0.1), transparent 58%),
    linear-gradient(180deg, #ffffff 0%, rgba(255, 255, 255, 0.35) 55%, rgba(245, 242, 236, 0) 100%);
  overflow: hidden;
}

.page-faq .kb-hero__frame::before {
  content: "";
  position: absolute;
  left: 0;
  top: 28px;
  bottom: 28px;
  width: 5px;
  background: repeating-linear-gradient(180deg, var(--amber) 0 1px, transparent 1px 13px);
  opacity: 0.6;
}

.page-faq .kb-hero__frame::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 18px;
  width: 26px;
  height: 26px;
  border-top: 2px solid var(--amber);
  border-right: 2px solid var(--amber);
  border-radius: 0 4px 0 0;
  opacity: 0.85;
}

.page-faq .kb-hero h1 {
  margin: 10px 0 16px;
  max-width: 15em;
  font-size: clamp(28px, 7.2vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .kb-hero .lede {
  max-width: 36em;
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--body-ink);
}

.page-faq .kb-hero__strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--kb-line);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-faq .kb-hero__strip b {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-right: 2px;
}

/* ---------- 分类索引 ---------- */
.page-faq .kb-index {
  margin-top: 44px;
}

.page-faq .kb-index__grid {
  display: grid;
  gap: 26px;
}

.page-faq .kb-index__title {
  margin: 0 0 16px;
  padding-left: 12px;
  border-left: 3px solid var(--amber);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .kb-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .kb-tab {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  border: 1px solid var(--warm-200);
  border-radius: var(--kb-radius);
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-faq .kb-tab:hover,
.page-faq .kb-tab:focus-visible {
  border-color: var(--amber);
  transform: translateX(3px);
  box-shadow: 0 2px 10px rgba(10, 27, 46, 0.06);
}

.page-faq .kb-tab__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
  padding: 2px 6px;
  border: 1px solid rgba(201, 162, 39, 0.32);
  border-radius: 3px;
}

.page-faq .kb-tab__name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-faq .kb-tab__count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--slate);
  letter-spacing: 0.04em;
}

.page-faq .kb-index__media {
  margin: 0;
}

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

/* ---------- 主体双栏 ---------- */
.page-faq .kb-body {
  display: grid;
  gap: 36px;
  margin-top: 52px;
}

.page-faq .kb-main {
  display: grid;
  gap: 44px;
  min-width: 0;
}

.page-faq .kb-cat {
  min-width: 0;
  scroll-margin-top: 78px;
}

.page-faq .kb-cat__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--kb-line);
}

.page-faq .kb-cat__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink);
  background: var(--amber-l);
  padding: 3px 8px;
  border-radius: 3px;
}

.page-faq .kb-cat__head h2 {
  flex: 1 1 100%;
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-faq .kb-cat__meta {
  flex: 1 1 100%;
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* ---------- 折叠条目 ---------- */
.page-faq .kb-details {
  margin-bottom: 10px;
  border: 1px solid var(--warm-200);
  border-radius: var(--kb-radius);
  background: #fff;
  overflow: hidden;
  transition: border-color 0.22s var(--ease);
}

.page-faq .kb-details[open] {
  border-color: rgba(201, 162, 39, 0.5);
}

.page-faq .kb-q {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink);
  transition: background 0.22s var(--ease);
}

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

.page-faq .kb-q:hover {
  background: rgba(245, 242, 236, 0.7);
}

.page-faq .kb-q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 17px;
  line-height: 1;
  color: var(--amber);
}

.page-faq .kb-details[open] .kb-q::after {
  content: "−";
}

.page-faq .kb-q__no {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber);
  background: rgba(201, 162, 39, 0.1);
  border: 1px solid rgba(201, 162, 39, 0.28);
  border-radius: 3px;
  padding: 2px 6px;
  position: relative;
  top: -1px;
}

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

.page-faq .kb-a {
  padding: 14px 16px 18px;
  border-top: 1px dashed var(--kb-line);
  font-size: 15px;
  line-height: 1.85;
  color: var(--body-ink);
}

/* ---------- 步骤列表 ---------- */
.page-faq .kb-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .kb-step {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: start;
}

.page-faq .kb-step__n {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: var(--ink);
  color: var(--amber-l);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
}

.page-faq .kb-step__body {
  min-width: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .kb-step__body strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 版本三问 ---------- */
.page-faq .kb-triage {
  display: grid;
  gap: 10px;
}

.page-faq .kb-triage__item {
  padding: 12px 14px;
  border-left: 3px solid var(--celadon);
  border-radius: 0 var(--kb-radius) var(--kb-radius) 0;
  background: rgba(46, 125, 107, 0.065);
}

.page-faq .kb-triage__q {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-faq .kb-triage__a {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--body-ink);
}

.page-faq .kb-triage__foot {
  margin: 14px 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .kb-triage__foot a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
}

.page-faq .kb-triage__foot a:hover {
  color: var(--celadon);
  border-bottom-color: var(--celadon);
}

/* ---------- 四个排查点 ---------- */
.page-faq .kb-checks {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: kbcheck;
}

.page-faq .kb-check {
  position: relative;
  padding-left: 36px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-ink);
}

.page-faq .kb-check::before {
  counter-increment: kbcheck;
  content: counter(kbcheck);
  position: absolute;
  left: 0;
  top: 3px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 3px;
  background: var(--warm-200);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
}

.page-faq .kb-check strong {
  color: var(--ink);
  font-weight: 700;
}

.page-faq .kb-media {
  margin: 0 auto 22px;
  max-width: 300px;
}

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

/* ---------- 右侧目录 ---------- */
.page-faq .kb-aside {
  display: none;
}

.page-faq .kb-toc {
  border-left: 1px solid var(--kb-line);
  padding-left: 18px;
}

.page-faq .kb-toc__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.page-faq .kb-toc__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .kb-toc__item {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--body-ink);
  text-decoration: none;
}

.page-faq .kb-toc__item::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 50%;
  width: 7px;
  height: 1px;
  background: rgba(10, 27, 46, 0.3);
  transition: width 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .kb-toc__item:hover::before,
.page-faq .kb-toc__item:focus-visible::before {
  width: 12px;
  background: var(--amber);
}

.page-faq .kb-toc__item:hover {
  color: var(--ink);
}

.page-faq .kb-toc__num {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-faq .kb-toc__hint {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 反馈区 ---------- */
.page-faq .kb-ask {
  margin: 56px 0 24px;
  padding: 28px 20px;
  border-radius: 10px;
  background:
    radial-gradient(130% 110% at 0% 0%, rgba(63, 169, 160, 0.16), transparent 55%),
    var(--ink);
  color: #e9eef4;
}

.page-faq .kb-ask__grid {
  display: grid;
  gap: 26px;
}

.page-faq .kb-ask .eyebrow {
  color: var(--amber-l);
}

.page-faq .kb-ask h2 {
  margin: 8px 0 14px;
  font-size: clamp(22px, 5.4vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.page-faq .kb-ask .lede {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(233, 238, 244, 0.82);
}

.page-faq .kb-mono {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--amber-l);
}

.page-faq .kb-ask__contact {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 2;
  color: rgba(233, 238, 244, 0.72);
}

.page-faq .kb-ask__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.page-faq .kb-ask__card {
  padding: 18px;
  border: 1px solid rgba(232, 199, 102, 0.28);
  border-radius: 8px;
  background: var(--navy-700);
}

.page-faq .kb-ask__card-title {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber-l);
}

.page-faq .kb-ask__tpl {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .kb-ask__tpl li {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(233, 238, 244, 0.8);
}

.page-faq .kb-ask__tpl li span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber-l);
}

.page-faq .kb-ask__tpl li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .kb-hero__frame {
    padding: 34px 32px 28px;
  }

  .page-faq .kb-hero .lede {
    font-size: 16px;
  }

  .page-faq .kb-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .kb-cat__head h2 {
    flex: 1 1 auto;
  }

  .page-faq .kb-cat__meta {
    flex: 0 1 auto;
    margin-left: auto;
  }

  .page-faq .kb-media {
    max-width: 380px;
  }
}

@media (min-width: 900px) {
  .page-faq .breadcrumbs {
    padding-top: 30px;
  }

  .page-faq .kb-hero {
    padding: 26px 0 10px;
  }

  .page-faq .kb-hero__frame {
    padding: 48px 48px 40px;
  }

  .page-faq .kb-hero .lede {
    font-size: 17px;
  }

  .page-faq .kb-index {
    margin-top: 56px;
  }

  .page-faq .kb-index__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-faq .kb-body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: 56px;
    margin-top: 64px;
  }

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

  .page-faq .kb-toc {
    position: sticky;
    top: 92px;
  }

  .page-faq .kb-cat__head h2 {
    font-size: 22px;
  }

  .page-faq .kb-media {
    margin-left: 0;
    max-width: 340px;
  }

  .page-faq .kb-ask {
    margin: 72px 0 32px;
    padding: 48px;
  }

  .page-faq .kb-ask__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
    gap: 48px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .kb-tab,
  .page-faq .kb-details,
  .page-faq .kb-toc__item::before {
    transition: none;
  }

  .page-faq .kb-tab:hover,
  .page-faq .kb-tab:focus-visible {
    transform: none;
  }

  .page-faq .kb-toc__item:hover::before,
  .page-faq .kb-toc__item:focus-visible::before {
    width: 7px;
  }
}