.page-faq {
  --faq-radius: 3px;
  --faq-glow: rgba(53, 255, 208, .42);
  padding-bottom: 80px;
}

/* ---------- 面包屑与首屏 ---------- */
.page-faq .faq-crumb {
  margin: 0 0 22px;
}
.page-faq .faq-hero .eyebrow {
  margin: 0 0 12px;
}
.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.78rem, 6vw, 3rem);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--paper);
  max-width: 22ch;
}
.page-faq .faq-hero .lead {
  max-width: 64ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: .86;
}

.page-faq .faq-facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  overflow: hidden;
}
.page-faq .faq-facts li {
  background: var(--ink-800);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-faq .faq-fact-num {
  font-size: 1.72rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}
.page-faq .faq-fact-label {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--muted);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  margin-top: 14px;
}
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

/* ---------- 左栏索引 ---------- */
.page-faq .faq-search {
  position: relative;
  border: 1px solid var(--line);
  background: var(--ink-850);
  border-radius: var(--faq-radius);
  padding: 16px 14px 10px 18px;
}
.page-faq .faq-search::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), rgba(53, 255, 208, 0));
}
.page-faq .faq-search-label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}
.page-faq .faq-search-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-search-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 2px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px dashed var(--line-2);
  transition: color .2s var(--ease);
}
.page-faq .faq-search-list li:last-child .faq-search-link {
  border-bottom: 0;
}
.page-faq .faq-search-link::after {
  content: "";
  flex: 1 1 auto;
  min-width: 16px;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 8px);
}
.page-faq .faq-search-link:hover,
.page-faq .faq-search-link:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-legend {
  margin-top: 16px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  border-radius: var(--faq-radius);
  padding: 14px 16px 16px;
}
.page-faq .faq-legend .eyebrow {
  margin: 0 0 12px;
}
.page-faq .faq-legend ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .faq-legend li {
  display: grid;
  gap: 5px;
}
.page-faq .faq-legend-text {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 右栏条目流 ---------- */
.page-faq .faq-stream {
  display: grid;
  gap: 44px;
  min-width: 0;
}
.page-faq .faq-topic {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}
.page-faq .faq-topic-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-topic-num {
  flex: none;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
  border: 1px solid var(--faq-glow);
  border-radius: var(--faq-radius);
  padding: 3px 8px;
}
.page-faq .faq-topic-head h2 {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.16rem, 4vw, 1.5rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-faq .faq-topic-head .tag {
  margin-left: auto;
}
.page-faq .faq-topic-intro {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  position: relative;
  margin-top: 12px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color .22s var(--ease), background-color .22s var(--ease);
}
.page-faq .faq-item:hover {
  border-color: var(--faq-glow);
}
.page-faq .faq-item[open] {
  border-color: var(--faq-glow);
  background: var(--ink-750);
}
.page-faq .faq-item[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
}
.page-faq .faq-item > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}
.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item > summary::before {
  content: "+";
  flex: none;
  width: 20px;
  height: 20px;
  line-height: 18px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  border: 1px solid var(--faq-glow);
  border-radius: 2px;
}
.page-faq .faq-item[open] > summary::before {
  content: "–";
  background: var(--cyan);
  color: var(--ink-900);
  border-color: var(--cyan);
}

.page-faq .faq-answer {
  padding: 16px 18px 20px;
  border-top: 1px dashed var(--line-2);
}
.page-faq .faq-answer > p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
  opacity: .9;
}
.page-faq .faq-answer > p:last-child {
  margin-bottom: 0;
}

/* ---------- 排查步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 40px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper);
  opacity: .92;
}
.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 28px;
  padding: 2px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 28px;
  bottom: -13px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(30, 58, 51, 0));
}
.page-faq .faq-steps li:last-child::after {
  content: none;
}

.page-faq .faq-relate {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-2);
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: .02em;
  color: var(--muted);
}
.page-faq .faq-relate a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(124, 246, 224, .4);
}
.page-faq .faq-relate a:hover,
.page-faq .faq-relate a:focus-visible {
  color: var(--cyan);
}

/* ---------- 配图 ---------- */
.page-faq .faq-shot {
  margin: 22px 0 0;
}
.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--ink-850);
}
.page-faq .faq-shot .figure-cap {
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--muted);
}

/* ---------- 工单准备清单 ---------- */
.page-faq .faq-checklist {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.page-faq .faq-checklist li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper);
  opacity: .92;
}
.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 11px;
  height: 2px;
  background: var(--amber);
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-contact {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  background: var(--ink-800);
  border-radius: var(--faq-radius);
  padding: 18px 18px 20px;
}
.page-faq .faq-contact-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--paper);
}
.page-faq .faq-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-faq .faq-contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-2);
}
.page-faq .faq-contact-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-faq .faq-contact-key {
  flex: none;
  min-width: 70px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}
.page-faq .faq-contact-val {
  font-size: 14.5px;
  color: var(--paper);
  word-break: break-all;
}
.page-faq .faq-contact-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 链接卡 ---------- */
.page-faq .faq-links {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.page-faq .faq-link-card {
  display: grid;
  gap: 6px;
  padding: 15px 16px;
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--ink-850);
  border-radius: var(--faq-radius);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}
.page-faq .faq-link-card:hover,
.page-faq .faq-link-card:focus-visible {
  border-color: var(--faq-glow);
}
.page-faq .faq-link-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  color: var(--cyan);
}
.page-faq .faq-link-desc {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-faq .faq-answer {
    padding: 18px 24px 22px 50px;
  }
  .page-faq .faq-links {
    grid-template-columns: 1fr 1fr;
  }
  .page-faq .faq-item > summary {
    padding: 17px 22px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: 262px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
  }
  .page-faq .faq-stream {
    gap: 56px;
  }
  .page-faq .faq-topic-intro {
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-link-card,
  .page-faq .faq-search-link {
    transition: none;
  }
  .page-faq .faq-link-card:hover {
    transform: none;
  }
}