.page-faq {
  --faq-line: rgba(35, 240, 230, .16);
  --faq-panel: rgba(20, 29, 48, .72);
  position: relative;
  color: var(--text);
  font-family: var(--font-sans);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 520px;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(138, 151, 173, .05) 0 1px, transparent 1px 46px),
    radial-gradient(900px 340px at 12% -8%, rgba(46, 107, 255, .22), transparent 70%),
    radial-gradient(620px 260px at 92% 4%, rgba(122, 59, 255, .18), transparent 72%);
  z-index: 0;
}

.page-faq > .container {
  position: relative;
  z-index: 1;
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 240, 230, .35);
  padding-bottom: 1px;
}

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

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(20px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  padding-block: clamp(24px, 4vw, 40px) clamp(32px, 5vw, 64px);
  align-items: end;
}

.page-faq .hero-main .display {
  margin: 14px 0 0;
  font-size: clamp(38px, 7.4vw, 84px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: -.01em;
  transform: skewX(-2deg);
  background: linear-gradient(96deg, #E8F1FF 12%, #23F0E6 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-faq .hero-main .display em {
  font-style: normal;
  color: var(--yellow);
  background: none;
  -webkit-text-fill-color: var(--yellow);
}

.page-faq .hero-main .lede {
  margin-top: 18px;
  max-width: 62ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .hero-side {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--faq-panel);
  padding: 22px 22px 20px;
  box-shadow: var(--glow-violet);
}

.page-faq .hero-side-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-faq .hero-side-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text);
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

.page-faq .hero-side-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .side-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: .08em;
  flex: none;
}

.page-faq .hero-figure {
  grid-column: 1 / -1;
  margin: 0;
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  margin-bottom: clamp(24px, 4vw, 40px);
  flex-wrap: wrap;
}

.page-faq .filter-btn {
  font-size: 13px;
}

.page-faq .filter-status:empty {
  display: none;
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 32px);
  align-items: start;
}

.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(11, 18, 32, .66);
  padding: 18px 16px 16px;
}

.page-faq .index-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .index-list::-webkit-scrollbar {
  display: none;
}

.page-faq .index-list li {
  flex: none;
}

.page-faq .index-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  font-size: 13px;
  white-space: nowrap;
  color: var(--muted);
  border-bottom: 1px solid var(--line-strong);
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-faq .index-list a:hover,
.page-faq .index-list a:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
  background: rgba(35, 240, 230, .08);
}

.page-faq .index-tick {
  width: 14px;
  height: 1px;
  background: var(--cyan);
  flex: none;
  opacity: .7;
}

.page-faq .index-note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--line-cyan);
  padding-left: 12px;
}

/* ---------- 分组 ---------- */
.page-faq .faq-answers {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 104px;
}

.page-faq .group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-faq .group-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 84px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-faq .group-mark {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--yellow);
  letter-spacing: .1em;
  flex: none;
  transform: skewX(-8deg);
}

.page-faq .group-title {
  margin: 0;
  font-size: clamp(20px, 3.4vw, 30px);
  font-weight: 800;
  letter-spacing: -.01em;
  flex: 1 1 auto;
}

.page-faq .group-note {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .04em;
  flex: none;
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(20, 29, 48, .5);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color .2s ease, background-color .2s ease, box-shadow .2s ease;
}

.page-faq .qa:hover {
  border-color: rgba(35, 240, 230, .38);
}

.page-faq .qa[open] {
  border-color: rgba(35, 240, 230, .55);
  background: rgba(16, 25, 42, .86);
  box-shadow: 0 24px 54px -40px rgba(35, 240, 230, .9);
}

.page-faq .qa-q {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

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

.page-faq .qa-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: .06em;
  flex: none;
}

.page-faq .qa-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-arrow {
  flex: none;
  width: 20px;
  height: 20px;
  position: relative;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  transition: transform .26s ease, border-color .26s ease, background-color .26s ease;
}

.page-faq .qa-arrow::before,
.page-faq .qa-arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-faq .qa-arrow::before {
  width: 9px;
  height: 1.5px;
}

.page-faq .qa-arrow::after {
  width: 1.5px;
  height: 9px;
  transition: opacity .26s ease;
}

.page-faq .qa[open] .qa-arrow {
  transform: rotate(180deg);
  border-color: var(--cyan);
  background: rgba(35, 240, 230, .12);
}

.page-faq .qa[open] .qa-arrow::after {
  opacity: 0;
}

.page-faq .qa-a {
  padding: 0 16px 20px 16px;
  border-top: 1px dashed var(--line);
  margin-top: 2px;
  padding-top: 16px;
}

.page-faq .qa-a p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

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

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

/* ---------- 步骤 ---------- */
.page-faq .steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .steps li {
  display: flex;
  gap: 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .step-num {
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(35, 240, 230, .9), rgba(122, 59, 255, .85));
  color: #05070C;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 设备图 ---------- */
.page-faq .device-figure {
  max-width: 340px;
  margin: 0 auto 8px;
}

.page-faq .media-caption {
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 16px;
}

/* ---------- 支持区 ---------- */
.page-faq .faq-group--support .group-head::after {
  background: linear-gradient(90deg, var(--yellow), var(--red));
}

.page-faq .support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .support-card {
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r-md);
  background: rgba(20, 29, 48, .62);
  padding: 16px 18px;
}

.page-faq .support-label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .support-value {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--yellow);
  word-break: break-all;
  letter-spacing: .01em;
}

.page-faq .support-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .support-tips {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(180deg, rgba(122, 59, 255, .1), transparent 62%),
    rgba(11, 18, 32, .7);
  padding: 20px 18px;
}

.page-faq .tips-title {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .tips-foot {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}

/* ---------- 筛选隐藏态 ---------- */
.page-faq .qa[data-filtered] {
  display: none;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .qa-q {
    padding: 18px 22px;
    font-size: 16px;
  }

  .page-faq .qa-a {
    padding: 18px 22px 24px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .hero-side {
    align-self: end;
    margin-bottom: 6px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    padding: 22px 20px 20px;
  }

  .page-faq .index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .index-list a {
    width: 100%;
    border: 0;
    border-left: 2px solid var(--line-strong);
    border-radius: 0;
    padding: 9px 12px;
    background: none;
    justify-content: flex-start;
  }

  .page-faq .index-list a:hover,
  .page-faq .index-list a:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(35, 240, 230, .07);
    color: var(--text);
  }

  .page-faq .index-tick {
    width: 10px;
  }

  .page-faq .device-figure {
    max-width: 380px;
    margin-left: 0;
    margin-right: auto;
  }

  .page-faq .media-caption {
    text-align: left;
  }

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

  .page-faq .support-tips {
    padding: 26px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-arrow,
  .page-faq .index-list a,
  .page-faq .qa {
    transition: none;
  }
}