.page-faq {
  --faq-ink: rgba(241, 243, 236, 0.8);
  --faq-ink-soft: rgba(241, 243, 236, 0.62);
  --faq-panel: rgba(16, 38, 58, 0.6);
  --faq-open: rgba(18, 63, 51, 0.46);
  position: relative;
  background:
    radial-gradient(920px 460px at 84% -6%, rgba(53, 225, 232, 0.12), transparent 60%),
    radial-gradient(700px 520px at 4% 14%, rgba(18, 208, 124, 0.08), transparent 66%),
    linear-gradient(180deg, #0A1826 0%, #0B1D2E 44%, #0E2436 100%);
  color: var(--c-paper);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 9vw, 120px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: clamp(14px, 2.4vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  border-bottom: 1px solid var(--c-line);
  padding: clamp(26px, 4.6vw, 56px) 0 clamp(30px, 4.6vw, 58px);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: center;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 7.2vw, 66px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--c-paper);
  max-width: 15ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-ink);
}

.page-faq .faq-hero__chips {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--c-line-strong);
  border-radius: 999px;
  background: var(--faq-panel);
  font-size: 13px;
  line-height: 1.4;
  color: var(--faq-ink);
}

.page-faq .faq-chip__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--c-amber);
}

.page-faq .faq-hero__art {
  position: relative;
  width: min(100%, 380px);
  margin-inline: auto;
}

.page-faq .faq-hero__art::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(10, 24, 38, 0.1), rgba(10, 24, 38, 0.72));
  pointer-events: none;
}

.page-faq .faq-hero__art img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--c-line);
  opacity: 0.62;
  filter: saturate(0.85) contrast(1.05);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: clamp(40px, 5vw, 76px);
  }
  .page-faq .faq-hero__art {
    width: 100%;
    margin-inline: 0;
  }
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(24px, 3.6vw, 40px);
  padding-top: clamp(30px, 4.6vw, 62px);
}

/* 分类索引 */
.page-faq .faq-index {
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 12px;
}

.page-faq .faq-index__label {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  height: 3px;
}

.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--c-line-strong);
  border-radius: 3px;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--faq-ink-soft);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color 200ms var(--ease), background-color 200ms var(--ease),
    border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-faq .faq-index__i {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
  transition: color 200ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-paper);
  background: rgba(255, 255, 255, 0.06);
  border-left-color: var(--c-green);
  outline: none;
}

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

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
    gap: clamp(38px, 5vw, 76px);
  }
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    border-bottom: 0;
    padding-bottom: 0;
    border-right: 1px solid var(--c-line);
    padding-right: 20px;
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-index__link {
    width: 100%;
  }
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-panels {
  min-width: 0;
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 84px);
  padding-top: clamp(30px, 4vw, 52px);
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: clamp(12px, 2vw, 20px);
}

.page-faq .faq-group__icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-sm);
  background: var(--faq-panel);
  color: var(--c-green);
}

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

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-faq .faq-group__meta {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-mist);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--c-line);
  transition: border-color 220ms var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  inset: -1px -8px;
  border-radius: var(--radius);
  background: var(--faq-open);
  opacity: 0;
  transition: opacity 260ms var(--ease);
  pointer-events: none;
}

.page-faq .faq-item[open]::before {
  opacity: 1;
}

.page-faq .faq-item[open] {
  border-bottom-color: transparent;
}

.page-faq .faq-item__q {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 17px 34px 17px 6px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-paper);
  transition: color 200ms var(--ease);
}

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

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

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

.page-faq .faq-item__num {
  flex: none;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
  padding-top: 3px;
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--c-green);
}

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

.page-faq .faq-item__mark {
  position: absolute;
  right: 8px;
  top: 22px;
  width: 15px;
  height: 15px;
  pointer-events: none;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-cyan);
  transform: translate(-50%, -50%);
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.page-faq .faq-item__mark::before {
  width: 13px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  width: 2px;
  height: 13px;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  position: relative;
  z-index: 1;
  margin-left: 30px;
  padding: 0 30px 22px 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-ink);
}

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

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

.page-faq .faq-item__a a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 200ms var(--ease);
}

.page-faq .faq-item__a a:hover {
  color: var(--c-green);
}

/* ---------- 答案内嵌数据小卡 ---------- */
.page-faq .faq-facts {
  list-style: none;
  margin: 14px 0 14px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-fact {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 13px;
  border: 1px solid var(--c-line-strong);
  border-left: 2px solid var(--c-amber);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.035);
  font-size: 13px;
  line-height: 1.55;
  color: var(--faq-ink);
}

.page-faq .faq-fact__k {
  flex: none;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-amber);
}

/* ---------- 设备示意图 ---------- */
.page-faq .faq-shot {
  margin: 18px 0 0;
  max-width: 520px;
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

/* ---------- 联系方式块 ---------- */
.page-faq .faq-contact {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius);
  background: rgba(10, 24, 38, 0.55);
  display: grid;
  gap: 8px;
}

.page-faq .faq-contact__row {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--faq-ink);
}

.page-faq .faq-contact__k {
  flex: none;
  width: 40px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-mist);
}

.page-faq .faq-contact__row a {
  color: var(--c-paper);
  text-decoration: none;
  border-bottom: 1px solid var(--c-line-strong);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

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

/* ---------- 组尾引导 ---------- */
.page-faq .faq-group__fallback {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-line-strong);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-faq .faq-group__fallback a {
  color: var(--c-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 208, 124, 0.4);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

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

/* ---------- CTA 行 ---------- */
.page-faq .faq-item__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px !important;
}

.page-faq .faq-group--last .faq-item:last-of-type {
  border-bottom-color: transparent;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-item__q {
    font-size: 17px;
    padding-left: 8px;
  }
  .page-faq .faq-item__a {
    margin-left: 34px;
    font-size: 16px;
  }
  .page-faq .faq-contact__k {
    width: 48px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-item__q {
    padding: 20px 40px 20px 8px;
    font-size: 18px;
  }
  .page-faq .faq-item__mark {
    right: 12px;
    top: 27px;
  }
  .page-faq .faq-item__a {
    margin-left: 34px;
    padding: 2px 48px 26px 0;
  }
  .page-faq .faq-group__icon {
    width: 40px;
    height: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item::before,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}