.page-faq {
  --faq-hairline: rgba(246, 233, 210, 0.14);
  --faq-hairline-dark: rgba(27, 20, 16, 0.16);
  --faq-ink-soft: rgba(27, 20, 16, 0.76);
  --faq-cream-soft: rgba(246, 233, 210, 0.76);
  background: var(--c-navy);
  color: var(--c-cream);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq h1,
.page-faq h2 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  line-height: 1.14;
  margin: 0;
}

.page-faq .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ---------- 顶部 ---------- */
.page-faq .faq-top {
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(53, 224, 224, 0.16), transparent 62%),
    radial-gradient(90% 70% at 0% 100%, rgba(255, 162, 58, 0.1), transparent 60%),
    var(--c-navy);
  border-bottom: 1px solid var(--faq-hairline);
  padding: clamp(18px, 4vw, 34px) 0 clamp(36px, 6vw, 68px);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 32px);
  font-size: 13px;
  color: rgba(246, 233, 210, 0.6);
}

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

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  border-bottom-color: var(--c-cyan);
}

.page-faq .faq-top__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
}

.page-faq .faq-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--c-amber);
}

.page-faq .faq-top h1 {
  font-size: clamp(1.9rem, 1.2rem + 3.4vw, 3.15rem);
  font-weight: 800;
  color: var(--c-paper);
  max-width: 20ch;
}

.page-faq .faq-top__intro {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--faq-cream-soft);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 26px 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--faq-hairline);
}

.page-faq .faq-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-stats strong {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--c-amber);
}

.page-faq .faq-stats span {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0;
  color: rgba(246, 233, 210, 0.62);
}

/* ---------- 图片容器 ---------- */
.page-faq .faq-figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--faq-hairline);
  background: linear-gradient(155deg, var(--c-bridge) 0%, var(--c-navy) 100%);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(246, 233, 210, 0.58);
  border-top: 1px solid var(--faq-hairline);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  padding-top: clamp(28px, 5vw, 56px);
}

/* ---------- 侧边索引 ---------- */
.page-faq .faq-rail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-rail__label {
  display: none;
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(246, 233, 210, 0.45);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__list li {
  flex: none;
}

.page-faq .faq-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(246, 233, 210, 0.2);
  color: var(--c-cream);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-rail__list a .mono {
  font-size: 11px;
  color: var(--c-cyan);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.page-faq .faq-rail__up {
  display: none;
  align-self: flex-start;
  margin-top: 6px;
  font-size: 12px;
  color: rgba(246, 233, 210, 0.5);
  text-decoration: none;
}

.page-faq .faq-rail__up:hover,
.page-faq .faq-rail__up:focus-visible {
  color: var(--c-amber);
}

/* ---------- 内容流 ---------- */
.page-faq .faq-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(40px, 6vw, 78px);
  min-width: 0;
}

.page-faq .faq-section {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-section--paper {
  background: var(--c-cream);
  color: var(--c-ink);
  border-radius: var(--radius-l);
  padding: clamp(22px, 4vw, 44px);
}

.page-faq .section-head {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .section-head__eyebrow {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
}

.page-faq .section-head__title {
  font-size: clamp(1.4rem, 1.05rem + 1.7vw, 2.05rem);
  font-weight: 700;
  color: var(--c-paper);
  max-width: 22ch;
}

.page-faq .section-head__note {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-cream-soft);
}

.page-faq .faq-section--paper .section-head__eyebrow {
  color: var(--c-ember);
}

.page-faq .faq-section--paper .section-head__title {
  color: var(--c-ink);
}

.page-faq .faq-section--paper .section-head__note {
  color: var(--faq-ink-soft);
}

/* ---------- 身份分段 ---------- */
.page-faq .faq-tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .faq-tabs .tabs__tab {
  min-height: 44px;
  padding: 9px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(246, 233, 210, 0.24);
  background: transparent;
  color: var(--c-cream);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.4;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-tabs .tabs__tab:hover,
.page-faq .faq-tabs .tabs__tab:focus-visible {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.page-faq .faq-tabs .tabs__tab[aria-selected="true"] {
  background: var(--c-amber);
  border-color: var(--c-amber);
  color: var(--c-navy);
  font-weight: 700;
}

.page-faq .faq-panel:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 6px;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-faq .qa-item {
  border-top: 1px solid var(--faq-hairline);
}

.page-faq .qa-item:last-child {
  border-bottom: 1px solid var(--faq-hairline);
}

.page-faq .qa-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 44px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  color: var(--c-cream);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa-item__summary:hover,
.page-faq .qa-item__summary:focus-visible {
  color: var(--c-cyan);
}

.page-faq .qa-item__id {
  flex: none;
  margin-top: 4px;
  padding-left: 8px;
  border-left: 2px solid var(--c-cyan);
  font-size: 12.5px;
  color: var(--c-cyan);
}

.page-faq .qa-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
}

.page-faq .qa-item__toggle {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid rgba(246, 233, 210, 0.34);
  border-radius: 50%;
}

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

.page-faq .qa-item__toggle::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .qa-item__toggle::after {
  width: 1.5px;
  height: 10px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .qa-item[open] .qa-item__toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-faq .qa-item__body {
  padding: 0 0 18px;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--faq-cream-soft);
}

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

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

.page-faq .qa-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-size: 14px;
}

.page-faq .qa-links a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 224, 0.42);
}

.page-faq .qa-links a:hover,
.page-faq .qa-links a:focus-visible {
  border-bottom-color: var(--c-cyan);
}

.page-faq .qa-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 0;
}

.page-faq .qa-tags .tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(246, 233, 210, 0.24);
  font-size: 12px;
  color: rgba(246, 233, 210, 0.72);
}

/* 米白底的问答样式反转 */
.page-faq .faq-section--paper .qa-item {
  border-top-color: var(--faq-hairline-dark);
}

.page-faq .faq-section--paper .qa-item:last-child {
  border-bottom-color: var(--faq-hairline-dark);
}

.page-faq .faq-section--paper .qa-item__summary {
  color: var(--c-ink);
}

.page-faq .faq-section--paper .qa-item__summary:hover,
.page-faq .faq-section--paper .qa-item__summary:focus-visible {
  color: var(--c-ember);
}

.page-faq .faq-section--paper .qa-item__id {
  color: var(--c-ink);
  border-left-color: var(--c-teal);
}

.page-faq .faq-section--paper .qa-item__toggle {
  border-color: rgba(27, 20, 16, 0.34);
}

.page-faq .faq-section--paper .qa-item__body {
  color: var(--faq-ink-soft);
}

.page-faq .faq-section--paper .qa-links a {
  color: var(--c-bridge);
  border-bottom-color: rgba(14, 42, 68, 0.4);
}

.page-faq .faq-section--paper .qa-tags .tag {
  border-color: rgba(27, 20, 16, 0.22);
  color: var(--faq-ink-soft);
}

/* ---------- 设备与下载 ---------- */
.page-faq .faq-device {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 32px);
  align-items: start;
}

.page-faq .faq-device__list {
  min-width: 0;
}

/* ---------- 联系 ---------- */
.page-faq .faq-section--contact {
  background:
    radial-gradient(100% 120% at 100% 0%, rgba(255, 162, 58, 0.14), transparent 60%),
    var(--c-bridge);
  border: 1px solid var(--faq-hairline);
  border-radius: var(--radius-l);
  padding: clamp(22px, 4vw, 44px);
}

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
}

.page-faq .faq-contact__lead {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--faq-cream-soft);
}

.page-faq .faq-contact__note {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(246, 233, 210, 0.6);
}

.page-faq .faq-contact__btn {
  margin-top: 20px;
}

.page-faq .faq-contact__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-hairline);
}

.page-faq .faq-contact__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--faq-hairline);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-cream);
}

.page-faq .faq-contact__label {
  flex: none;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--c-amber);
}

.page-faq .faq-contact__list a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 224, 0.4);
  word-break: break-word;
}

.page-faq .faq-contact__list a:hover,
.page-faq .faq-contact__list a:focus-visible {
  border-bottom-color: var(--c-cyan);
}

.page-faq .faq-contact__list li span:last-child {
  color: var(--faq-cream-soft);
  font-size: 14px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-top__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

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

  .page-faq .faq-contact__list li {
    align-items: flex-start;
  }

  .page-faq .faq-contact__label {
    width: 56px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    gap: 0;
  }

  .page-faq .faq-rail__label {
    display: block;
    margin-bottom: 14px;
  }

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

  .page-faq .faq-rail__list a {
    min-height: 0;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 2px solid rgba(246, 233, 210, 0.18);
    border-radius: 0;
    font-size: 14px;
    transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-left-color: var(--c-cyan);
    background: rgba(53, 224, 224, 0.07);
  }

  .page-faq .faq-rail__up {
    display: inline-block;
  }

  .page-faq .faq-device {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .qa-item__q {
    font-size: 17px;
  }

  .page-faq .qa-item__summary {
    padding: 18px 0;
  }
}

/* ---------- 大屏微调 ---------- */
@media (min-width: 1320px) {
  .page-faq .faq-top h1 {
    max-width: 22ch;
  }

  .page-faq .faq-section--paper {
    padding: 48px 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item__toggle::after,
  .page-faq .faq-rail__list a,
  .page-faq .faq-tabs .tabs__tab,
  .page-faq .qa-item__summary {
    transition: none;
  }
}