.page-faq {
  --faq-band: rgba(16, 31, 63, 0.72);
  --faq-band-soft: rgba(16, 31, 63, 0.42);
  --faq-tint: rgba(53, 224, 255, 0.09);
  display: block;
  background: var(--deep);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.75;
}

/* 面包屑 */
.page-faq .crumbs {
  padding-top: clamp(16px, 2.4vw, 26px);
  padding-bottom: clamp(14px, 2vw, 22px);
}
.page-faq .crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
  color: var(--muted);
}
.page-faq .crumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--silver);
  opacity: 0.5;
}
.page-faq .crumb-list a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .crumb-list a:hover,
.page-faq .crumb-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(158deg, var(--deep) 0%, var(--deep) 44%, var(--indigo) 100%);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -34%;
  width: 46%;
  height: 168%;
  background: linear-gradient(120deg, rgba(53, 224, 255, 0.1), rgba(58, 46, 110, 0.32));
  transform: skewX(-12deg);
  pointer-events: none;
}
.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
  padding-block: clamp(32px, 5.4vw, 74px) clamp(30px, 4.6vw, 64px);
}
.page-faq .faq-hero-copy {
  max-width: 46ch;
}
.page-faq .eyebrow {
  margin: 0 0 12px;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--cyan);
}
.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 6.4vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.06;
  color: var(--mist);
}
.page-faq .faq-lede {
  margin: 0;
  max-width: 42ch;
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
  color: var(--silver);
}
.page-faq .faq-hero-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.page-faq .faq-hero-index span::before {
  content: "◦";
  margin-right: 7px;
  color: var(--orange);
}
.page-faq .faq-hero-art {
  border-radius: 2px 26px 2px 26px;
  overflow: hidden;
  border: 1px solid var(--line-cyan);
}
.page-faq .faq-hero-art img,
.page-faq .faq-device-art img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 主体 */
.page-faq .faq-body {
  padding-top: clamp(40px, 6vw, 78px);
  padding-bottom: clamp(38px, 5vw, 70px);
}
.page-faq .section-head {
  max-width: 58ch;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}
.page-faq .section-title {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.16;
  color: var(--mist);
}
.page-faq .section-lede {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* 标签页 */
.page-faq .faq-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}
.page-faq .faq-tabs .tab {
  flex: 0 0 auto;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.page-faq .faq-tabs .tab:hover {
  color: var(--mist);
  border-color: var(--line-cyan);
}
.page-faq .faq-tabs .tab[aria-selected="true"] {
  color: var(--mist);
  background: var(--faq-tint);
  border-color: var(--line-cyan);
  box-shadow: inset 0 -2px 0 var(--cyan);
}
.page-faq .faq-tabs .tab:focus-visible,
.page-faq .qa-item summary:focus-visible,
.page-faq .faq-help a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* 面板与问题列表 */
.page-faq .faq-panels {
  margin-top: clamp(20px, 2.6vw, 30px);
}
.page-faq .faq-panel {
  background: var(--faq-band);
  border: 1px solid var(--line);
  border-radius: 14px 2px 14px 2px;
  padding: clamp(8px, 1.6vw, 20px) clamp(16px, 2.6vw, 34px);
  background-image: linear-gradient(180deg, rgba(53, 224, 255, 0.04), transparent 30%);
}
.page-faq .faq-panel[hidden] {
  display: none;
}
.page-faq .qa-list {
  display: block;
}
.page-faq .qa-item {
  border-bottom: 1px solid var(--line);
}
.page-faq .qa-item:last-child {
  border-bottom: 0;
}
.page-faq .qa-item summary {
  display: grid;
  grid-template-columns: 2.1em 1fr 1.4em;
  align-items: start;
  gap: 12px;
  padding: clamp(14px, 1.8vw, 20px) 0;
  cursor: pointer;
  list-style: none;
}
.page-faq .qa-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .qa-item summary::after {
  content: "+";
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1.5;
  color: var(--cyan);
}
.page-faq .qa-item[open] summary::after {
  content: "–";
  color: var(--orange);
}
.page-faq .qa-index {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  padding-top: 0.28em;
}
.page-faq .qa-item[open] .qa-index {
  color: var(--cyan);
}
.page-faq .qa-q {
  margin: 0;
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
  font-weight: 700;
  line-height: 1.55;
  color: var(--mist);
}
.page-faq .qa-body {
  padding: 0 0 clamp(16px, 2vw, 24px) calc(2.1em + 12px);
  color: var(--silver);
  font-size: 0.95rem;
}
.page-faq .qa-body p {
  margin: 0 0 12px;
  max-width: 46ch;
}
.page-faq .qa-body p:last-child {
  margin-bottom: 0;
}
.page-faq .qa-steps {
  position: relative;
  list-style: none;
  margin: 14px 0 0;
  padding: 0 0 0 26px;
  display: grid;
  gap: 10px;
}
.page-faq .qa-steps::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.7em;
  bottom: 0.7em;
  width: 1px;
  background: var(--line-cyan);
}
.page-faq .qa-steps li {
  position: relative;
  max-width: 44ch;
}
.page-faq .qa-steps li::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 0.68em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
}
.page-faq .qa-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

/* 设备面板内的图文并置 */
.page-faq .faq-device-layout {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}
.page-faq .faq-device-art {
  border: 1px solid var(--line);
  border-radius: 2px 20px 2px 20px;
  overflow: hidden;
  margin: 0 0 clamp(18px, 2.4vw, 26px);
}

/* 兜底区块 */
.page-faq .faq-help {
  background: linear-gradient(180deg, var(--indigo) 0%, var(--ink) 100%);
  border-top: 1px solid var(--line);
  padding-block: clamp(38px, 5.4vw, 72px);
}
.page-faq .faq-help-grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 48px);
  align-items: start;
}
.page-faq .faq-help-copy {
  max-width: 50ch;
}
.page-faq .faq-help-copy h2 {
  margin: 0 0 16px;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.18;
  color: var(--mist);
}
.page-faq .faq-help-copy p {
  margin: 0 0 14px;
  color: var(--silver);
  font-size: 0.96rem;
  max-width: 46ch;
}
.page-faq .faq-help-copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}
.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px !important;
}
.page-faq .faq-help-card {
  border: 1px solid var(--line);
  border-radius: 2px 18px 2px 18px;
  padding: clamp(18px, 2.6vw, 28px);
  background-color: var(--faq-band-soft);
}
.page-faq .faq-help-card h3 {
  margin: 0 0 14px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber);
}
.page-faq .faq-help-line {
  margin: 0 0 10px;
  font-size: 0.96rem;
  color: var(--mist);
}
.page-faq .faq-help-line .data-num {
  font-family: var(--font-mono);
  font-size: 1.18rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-faq .faq-help-note {
  margin: 0 0 10px;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted);
}
.page-faq .faq-help-note:last-child {
  margin-bottom: 0;
}

/* 平板与桌面 */
@media (min-width: 800px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 1.02fr 0.98fr;
  }
  .page-faq .faq-help-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-device-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
  }
  .page-faq .faq-device-art {
    position: sticky;
    top: 24px;
    margin-bottom: 0;
  }
}

@media (max-width: 560px) {
  .page-faq .qa-item summary {
    grid-template-columns: 1.7em 1fr 1.2em;
    gap: 10px;
  }
  .page-faq .qa-body {
    padding-left: calc(1.7em + 10px);
  }
  .page-faq .faq-hero-index {
    font-size: 0.72rem;
    gap: 6px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tabs .tab {
    transition: none;
  }
}