.page-faq {
  --faq-body-ink: #39485a;
  --faq-mute: #5c6f82;
  --faq-card: #ffffff;
  --faq-hair: rgba(11, 27, 42, 0.09);
  --faq-hair-strong: rgba(11, 27, 42, 0.16);
  display: block;
  background: var(--mist);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--frame-top, 68px) + clamp(22px, 4vw, 48px));
  padding-bottom: clamp(56px, 9vw, 104px);
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(22, 224, 200, 0.14), transparent 62%),
    linear-gradient(158deg, #0b1b2a 0%, #08131f 52%, #0f2740 100%);
  border-bottom-left-radius: clamp(26px, 4vw, 44px);
  border-bottom-right-radius: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero__slice {
  position: absolute;
  top: -22%;
  right: -14%;
  width: min(820px, 88%);
  height: 560px;
  border-radius: 56px;
  background: linear-gradient(132deg, rgba(22, 224, 200, 0.2), rgba(122, 92, 255, 0.16) 54%, rgba(11, 27, 42, 0) 82%);
  transform: rotate(-9deg);
  pointer-events: none;
}

.page-faq .faq-hero__glow {
  position: absolute;
  left: -10%;
  bottom: -34%;
  width: min(620px, 72%);
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 179, 61, 0.16), transparent 68%);
  pointer-events: none;
}

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

.page-faq .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 30px);
  color: var(--text-soft);
}

.page-faq .breadcrumbs a {
  color: var(--aqua);
  text-decoration: none;
}

.page-faq .breadcrumbs a:hover {
  text-decoration: underline;
}

.page-faq .faq-hero__pill {
  display: inline-block;
  margin: 0;
}

.page-faq .faq-hero__title {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  color: var(--text);
  max-width: 17ch;
}

.page-faq .faq-hero__lede {
  max-width: 48ch;
  margin-top: clamp(16px, 2vw, 22px);
  color: var(--text-soft);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(20, 48, 74, 0.58);
  color: var(--text-soft);
  font-size: 0.92rem;
  white-space: nowrap;
}

.page-faq .faq-hero__facts .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--aqua);
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-body {
  background: var(--mist);
  padding-block: clamp(34px, 5vw, 62px) clamp(54px, 8vw, 92px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
}

/* ---------- 左侧主题列 ---------- */

.page-faq .faq-nav__label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--faq-mute);
}

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

.page-faq .faq-nav__list::-webkit-scrollbar {
  height: 0;
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 18px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-pill);
  background: var(--faq-card);
  color: var(--graphite);
  font-size: 0.92rem;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: background 0.26s var(--ease), color 0.26s var(--ease),
    border-color 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-faq .faq-nav__link:hover {
  border-color: var(--aqua);
  color: var(--ink);
  transform: translateY(-1px);
}

.page-faq .faq-nav__idx {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--faq-mute);
  transition: color 0.26s var(--ease);
}

.page-faq .faq-body__grid:has(#faq-data:target) .faq-nav__link[href="#faq-data"],
.page-faq .faq-body__grid:has(#faq-season:target) .faq-nav__link[href="#faq-season"],
.page-faq .faq-body__grid:has(#faq-history:target) .faq-nav__link[href="#faq-history"],
.page-faq .faq-body__grid:has(#faq-stands:target) .faq-nav__link[href="#faq-stands"],
.page-faq .faq-body__grid:has(#faq-api:target) .faq-nav__link[href="#faq-api"],
.page-faq .faq-body__grid:has(#faq-device:target) .faq-nav__link[href="#faq-device"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--text);
}

.page-faq .faq-body__grid:has(#faq-data:target) .faq-nav__link[href="#faq-data"] .faq-nav__idx,
.page-faq .faq-body__grid:has(#faq-season:target) .faq-nav__link[href="#faq-season"] .faq-nav__idx,
.page-faq .faq-body__grid:has(#faq-history:target) .faq-nav__link[href="#faq-history"] .faq-nav__idx,
.page-faq .faq-body__grid:has(#faq-stands:target) .faq-nav__link[href="#faq-stands"] .faq-nav__idx,
.page-faq .faq-body__grid:has(#faq-api:target) .faq-nav__link[href="#faq-api"] .faq-nav__idx,
.page-faq .faq-body__grid:has(#faq-device:target) .faq-nav__link[href="#faq-device"] .faq-nav__idx {
  color: var(--aqua);
}

/* ---------- 分组 ---------- */

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

.page-faq .faq-group {
  scroll-margin-top: calc(var(--frame-top, 68px) + 26px);
  margin-bottom: clamp(34px, 5vw, 58px);
  min-width: 0;
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 20px);
  margin-bottom: clamp(16px, 2.4vw, 22px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-group__no {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.05em;
  color: rgba(11, 27, 42, 0.13);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.32rem, 2.6vw, 1.8rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.24;
  color: var(--ink);
}

.page-faq .faq-group__desc {
  margin: 6px 0 0;
  max-width: 52ch;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--faq-mute);
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--faq-hair);
}

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

.page-faq .faq-figure__cap {
  padding: 12px 18px;
  background: var(--faq-card);
  border-top: 1px solid var(--faq-hair);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--faq-mute);
}

/* ---------- 手风琴条目 ---------- */

.page-faq .faq-item {
  margin-bottom: 12px;
  background: var(--faq-card);
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--faq-hair-strong);
}

.page-faq .faq-item[open] {
  border-color: rgba(22, 224, 200, 0.5);
  box-shadow: 0 16px 34px -22px rgba(11, 27, 42, 0.45);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(15px, 2vw, 19px) clamp(16px, 2.4vw, 22px);
  cursor: pointer;
  list-style: none;
  font-size: clamp(0.98rem, 1.6vw, 1.05rem);
  font-weight: 650;
  line-height: 1.6;
  color: var(--ink);
  transition: color 0.26s var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--ink-deep);
}

.page-faq .faq-item__icon {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--faq-hair-strong);
  border-radius: 50%;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease),
    border-color 0.35s var(--ease);
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  top: 50%;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transform: translateY(-50%);
  transition: transform 0.35s var(--ease), opacity 0.35s var(--ease),
    background 0.35s var(--ease);
}

.page-faq .faq-item__icon::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__icon {
  background: var(--aqua);
  border-color: var(--aqua);
  transform: rotate(180deg);
}

.page-faq .faq-item[open] .faq-item__icon::before,
.page-faq .faq-item[open] .faq-item__icon::after {
  background: var(--ink-deep);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 clamp(16px, 2.4vw, 22px) clamp(16px, 2.2vw, 20px);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--faq-body-ink);
  overflow-wrap: anywhere;
}

.page-faq .faq-item__a a {
  color: #0e7d74;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.24s var(--ease);
}

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

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-reveal 0.4s var(--ease) both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 答案中的关键数字 ---------- */

.page-faq .faq-num {
  display: inline-block;
  padding: 0 6px;
  border-radius: 6px;
  background: rgba(22, 224, 200, 0.18);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--ink-deep);
}

/* ---------- 接口分组的分栏 ---------- */

.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
  align-items: start;
}

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

.page-faq .faq-figure--side {
  margin-bottom: 0;
  background: linear-gradient(150deg, var(--ink) 0%, var(--ink-2) 100%);
}

/* ---------- 尾部行动区 ---------- */

.page-faq .faq-cta {
  position: relative;
  overflow: hidden;
  padding-block: clamp(42px, 6vw, 72px);
  background:
    radial-gradient(110% 130% at 12% 0%, rgba(122, 92, 255, 0.2), transparent 60%),
    linear-gradient(140deg, #0b1b2a, #08131f);
  border-top-left-radius: clamp(26px, 4vw, 44px);
  border-top-right-radius: clamp(26px, 4vw, 44px);
}

.page-faq .faq-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-cta__title {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-cta__text p {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__title {
    max-width: 20ch;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 246px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 60px);
  }

  .page-faq .faq-nav {
    position: sticky;
    top: calc(var(--frame-top, 68px) + 28px);
    align-self: start;
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-nav__link {
    width: 100%;
    justify-content: flex-start;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.92fr);
  }

  .page-faq .faq-split .faq-figure--side {
    position: sticky;
    top: calc(var(--frame-top, 68px) + 28px);
  }
}

@media (max-width: 599px) {
  .page-faq .faq-hero__facts {
    gap: 8px;
  }

  .page-faq .faq-hero__facts li {
    padding: 8px 14px;
    font-size: 0.86rem;
  }

  .page-faq .faq-group__head {
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}