.page-faq {
  --faq-gap: clamp(28px, 5vw, 48px);
  --faq-rule: rgba(46, 42, 68, .9);
  position: relative;
  color: var(--paper);
  padding-bottom: clamp(64px, 9vw, 112px);
}

.page-faq .visually-hidden-title {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-faq .breadcrumb {
  margin-bottom: clamp(24px, 4vw, 40px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  max-width: 880px;
  padding-bottom: clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-coord {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-coord .numeric {
  color: var(--orange);
  margin-right: 6px;
}

.page-faq .faq-hero .display-title {
  margin: 0 0 20px;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  margin: 0 0 26px;
  max-width: 730px;
  color: var(--muted);
}

.page-faq .hero-pills {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 通用小节头 ---------- */
.page-faq .steps-head {
  margin-bottom: 26px;
}

.page-faq .section-index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--violet);
}

.page-faq .section-title {
  margin: 0;
  color: var(--paper);
}

/* ---------- 三步流程 ---------- */
.page-faq .faq-steps {
  padding-top: clamp(40px, 6vw, 72px);
}

.page-faq .step-flow {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-faq .step {
  position: relative;
  padding: 24px 22px 22px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: background var(--step-fast) var(--ease),
              border-color var(--step-fast) var(--ease);
}

.page-faq .step:hover {
  background: var(--ink-3);
  border-color: rgba(23, 230, 210, .45);
}

.page-faq .step-num {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 13px;
  border-radius: var(--radius-pill);
  background: rgba(23, 230, 210, .12);
  color: var(--cyan);
  font-size: 12px;
}

.page-faq .step-title {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--paper);
}

.page-faq .step-text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .flow-figure {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-faq .flow-figure .media-frame {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .flow-figure .media-caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 双栏问答 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-top: clamp(48px, 7vw, 84px);
}

.page-faq .faq-index-col {
  min-width: 0;
}

.page-faq .index-caption {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-faq .idx-group:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-faq .idx-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: .92rem;
  color: var(--paper);
  transition: color var(--step-fast) var(--ease);
}

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

.page-faq .idx-summary:hover {
  color: var(--cyan);
}

.page-faq .idx-group-label {
  min-width: 0;
}

.page-faq .idx-count {
  margin-left: auto;
  font-size: 11px;
  color: var(--violet);
}

.page-faq .idx-summary::after {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--step-fast) var(--ease);
}

.page-faq .idx-group[open] > .idx-summary::after {
  transform: rotate(-135deg) translate(-1px, -1px);
}

.page-faq .idx-list {
  list-style: none;
  margin: 0;
  padding: 0 0 12px;
  display: grid;
  gap: 2px;
}

.page-faq .idx-link {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-size: .86rem;
  line-height: 1.55;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--step-fast) var(--ease),
              background var(--step-fast) var(--ease),
              border-color var(--step-fast) var(--ease);
}

.page-faq .idx-link:hover,
.page-faq .idx-link:focus-visible {
  color: var(--paper);
  background: var(--ink-2);
  border-left-color: var(--cyan);
}

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

.page-faq .idx-num {
  flex: none;
  font-size: 11px;
  line-height: 1.85;
  color: var(--orange);
}

/* ---------- 答案列 ---------- */
.page-faq .faq-answers {
  min-width: 0;
  display: grid;
  gap: clamp(38px, 5vw, 54px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2px;
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--paper);
}

.page-faq .faq-group-count {
  margin-left: auto;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--violet);
}

.page-faq .faq-item {
  scroll-margin-top: 96px;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  padding: 0;
}

.page-faq .faq-q {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 20px 8px 20px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--paper);
  transition: color var(--step-fast) var(--ease);
}

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

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

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-item[open] > .faq-q {
  color: var(--cyan);
}

.page-faq .faq-q-num {
  flex: none;
  width: 30px;
  font-size: 12px;
  line-height: 1.9;
  color: var(--orange);
}

.page-faq .faq-a {
  padding: 0 8px 24px 44px;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.78;
}

.page-faq .faq-a p {
  margin: 0 0 10px;
}

.page-faq .faq-a p:last-child {
  margin-bottom: 0;
}

/* ---------- 问答列表配图 ---------- */
.page-faq .device-figure {
  margin: 0 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  align-items: end;
}

.page-faq .device-figure .media-frame {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  max-width: 340px;
}

.page-faq .device-figure .media-caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 名词表 ---------- */
.page-faq .glossary {
  padding-top: clamp(52px, 7vw, 88px);
}

.page-faq .glossary-list {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .glossary-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .glossary-term {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1rem;
  color: var(--paper);
}

.page-faq .term-tag {
  display: inline-block;
  margin-left: 10px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: rgba(255, 184, 77, .14);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .1em;
  vertical-align: middle;
}

.page-faq .glossary-def {
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.78;
}

/* ---------- 排查顺序 ---------- */
.page-faq .troubleshoot {
  padding-top: clamp(52px, 7vw, 88px);
}

.page-faq .ts-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .ts-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .ts-num {
  font-size: 13px;
  line-height: 1.9;
  color: var(--cyan);
}

.page-faq .ts-body {
  min-width: 0;
}

.page-faq .ts-title {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: .98rem;
  color: var(--paper);
}

.page-faq .ts-text {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(48px, 7vw, 80px);
  padding: clamp(28px, 4vw, 46px);
  border-radius: var(--radius-lg);
  color: var(--brown);
}

.page-faq .faq-contact h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 2.8vw, 2rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--brown);
}

.page-faq .faq-contact p {
  margin: 0;
  max-width: 760px;
  font-size: .95rem;
  line-height: 1.78;
  color: rgba(42, 29, 22, .82);
}

.page-faq .contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 26px 0 20px;
}

.page-faq .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid rgba(42, 29, 22, .18);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .34);
}

.page-faq .contact-label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .08em;
  color: rgba(42, 29, 22, .62);
}

.page-faq .contact-value {
  margin-right: auto;
  font-size: .92rem;
  color: var(--brown);
  overflow-wrap: anywhere;
}

.page-faq .copy-btn {
  flex: none;
  padding: 5px 15px;
  border: 1px solid rgba(42, 29, 22, .3);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--brown);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--step-fast) var(--ease),
              background var(--step-fast) var(--ease),
              box-shadow var(--step-fast) var(--ease);
}

.page-faq .copy-btn:hover {
  border-color: var(--brown);
  background: rgba(42, 29, 22, .08);
}

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

.page-faq .copy-btn.is-copied {
  border-color: #3f7a12;
  box-shadow: 0 0 0 2px rgba(198, 255, 79, .75);
}

.page-faq .contact-note {
  margin-top: 4px;
  padding-top: 16px;
  border-top: 1px dashed rgba(42, 29, 22, .22);
  font-family: var(--font-display);
  font-size: .88rem;
  line-height: 1.75;
  color: rgba(42, 29, 22, .74);
}

.page-faq .contact-more {
  margin-top: 18px;
  font-size: .9rem;
  line-height: 1.9;
  color: rgba(42, 29, 22, .78);
}

.page-faq .contact-more a {
  color: var(--brown);
  text-decoration: none;
  border-bottom: 1px solid rgba(42, 29, 22, .35);
  transition: border-color var(--step-fast) var(--ease),
              color var(--step-fast) var(--ease);
}

.page-faq .contact-more a:hover {
  color: #b8410f;
  border-bottom-color: #b8410f;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .glossary-row {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

  .page-faq .ts-item {
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 22px;
  }

  .page-faq .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 24px;
  }

  .page-faq .device-figure {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 22px;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .step-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-faq .step + .step::before {
    content: "";
    position: absolute;
    left: -13px;
    top: 44px;
    width: 26px;
    height: 1px;
    background: linear-gradient(90deg, rgba(23, 230, 210, .7), rgba(139, 92, 246, .35));
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 268px) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-index-col {
    position: sticky;
    top: 28px;
    max-height: calc(100vh - 56px);
    overflow-y: auto;
    scrollbar-width: thin;
    padding-right: 6px;
  }

  .page-faq .step-flow {
    gap: 28px;
  }

  .page-faq .step + .step::before {
    left: -15px;
    width: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 1ms !important;
  }
}