.page-faq {
  --faq-rail-w: 228px;
  --faq-rule: rgba(143, 163, 191, 0.22);
  --faq-cyan-soft: rgba(77, 227, 210, 0.45);
  --faq-violet-soft: rgba(122, 92, 255, 0.28);
}

.page-faq [id] {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .wrap {
  width: 100%;
  max-width: var(--wrap);
}

/* ============ 首屏 ============ */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 34px) 0 clamp(42px, 7vw, 78px);
  background:
    radial-gradient(130% 100% at 8% -10%, rgba(122, 92, 255, 0.24), transparent 60%),
    radial-gradient(90% 80% at 96% 8%, rgba(77, 227, 210, 0.12), transparent 62%),
    linear-gradient(180deg, var(--c-night) 0%, var(--c-ink) 100%);
  border-bottom: 1px solid var(--c-line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -30%;
  left: -12%;
  width: 78%;
  height: 150%;
  background: linear-gradient(118deg, rgba(122, 92, 255, 0.16), rgba(77, 227, 210, 0.06) 46%, transparent 72%);
  transform: rotate(-9deg);
  pointer-events: none;
  animation: faq-drift 40s ease-in-out infinite alternate;
}

@keyframes faq-drift {
  from { transform: rotate(-9deg) translate3d(0, 0, 0); }
  to { transform: rotate(-9deg) translate3d(3%, 2%, 0); }
}

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

.page-faq .faq-hero__crumb {
  margin-bottom: clamp(20px, 4vw, 36px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

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

.page-faq .faq-hero__lead .u-index {
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 13px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--pill);
  color: var(--c-cyan);
  letter-spacing: 0.08em;
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 8vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-faq .faq-hero__lede {
  margin: 0 0 26px;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(243, 233, 218, 0.86);
}

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

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

/* ============ 条目索引区 ============ */

.page-faq .faq-index {
  background: linear-gradient(180deg, var(--c-ink) 0%, var(--c-night) 42%, var(--c-night) 100%);
}

.page-faq .faq-index__layout {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

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

.page-faq .faq-index__railLabel {
  display: block;
  margin: 0 0 12px;
  color: var(--c-mist);
  letter-spacing: 0.14em;
}

.page-faq .faq-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-cats__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--pill);
  background: rgba(10, 23, 48, 0.6);
  color: var(--c-paper);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-faq .faq-cats__num {
  font-family: var(--font-index);
  font-size: 11px;
  color: var(--c-cyan);
  letter-spacing: 0.06em;
}

.page-faq .faq-cats__link:hover,
.page-faq .faq-cats__link:focus-visible {
  border-color: var(--faq-cyan-soft);
  background: rgba(122, 92, 255, 0.18);
  transform: translateY(-2px);
}

.page-faq .faq-index__hint {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-mist);
}

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

.page-faq .faq-index__head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-cat {
  padding-top: clamp(22px, 3vw, 32px);
}

.page-faq .faq-cat + .faq-cat {
  margin-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-cat__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
}

.page-faq .faq-cat__num {
  font-family: var(--font-index);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
  padding: 3px 10px;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--pill);
}

.page-faq .faq-cat__title {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  color: var(--c-paper);
}

/* ---- 折叠条目 ---- */

.page-faq .faq-item {
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-item[open] {
  background: linear-gradient(90deg, rgba(122, 92, 255, 0.12), transparent 68%);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 12px 16px 10px;
  cursor: pointer;
  list-style: none;
  transition: color 0.25s var(--ease);
}

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

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

.page-faq .faq-item__id {
  flex: 0 0 auto;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 500;
  line-height: 1.7;
  color: var(--c-paper);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-item__mark::after {
  left: 50%;
  top: 0;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

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

.page-faq .faq-item__a {
  padding: 0 34px 20px 12px;
  border-left: 1px solid var(--faq-cyan-soft);
  margin-left: 10px;
  padding-left: 18px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(243, 233, 218, 0.84);
}

.page-faq .faq-item__a a {
  color: var(--c-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 139, 61, 0.5);
}

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

/* ============ 苹果端速查 ============ */

.page-faq .faq-apple {
  background:
    radial-gradient(80% 70% at 88% 4%, rgba(77, 227, 210, 0.1), transparent 60%),
    var(--c-ink);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-apple__head {
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-faq .faq-apple__head .u-index {
  display: block;
  margin: 0 0 10px;
  color: var(--c-cyan);
  letter-spacing: 0.14em;
}

.page-faq .faq-apple__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 0 0 24px 48px;
  counter-increment: faqstep;
}

.page-faq .faq-steps__item::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--faq-cyan-soft);
  border-radius: 50%;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
  background: rgba(10, 23, 48, 0.8);
}

.page-faq .faq-steps__item::after {
  content: "";
  position: absolute;
  left: 15px;
  top: 36px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, var(--faq-cyan-soft), transparent);
}

.page-faq .faq-steps__item:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps__item:last-child::after {
  display: none;
}

.page-faq .faq-steps__title {
  margin: 4px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-faq .faq-steps__item p {
  margin: 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(243, 233, 218, 0.8);
}

.page-faq .faq-apple__media {
  margin: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-float);
}

.page-faq .faq-apple__notes {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-faq .faq-note {
  padding: clamp(20px, 3vw, 28px);
}

.page-faq .faq-note__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-brown);
}

.page-faq .faq-note__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(26, 20, 16, 0.82);
}

/* ============ 高频直答 ============ */

.page-faq .faq-quick {
  background: var(--c-night);
}

.page-faq .faq-quick__head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-quick__grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.page-faq .faq-quick__card {
  position: relative;
  padding: 26px 22px 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(122, 92, 255, 0.14), rgba(10, 23, 48, 0.9) 58%);
  overflow: hidden;
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-faq .faq-quick__card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--c-cyan), transparent 78%);
}

.page-faq .faq-quick__card:nth-child(2)::before {
  background: linear-gradient(180deg, var(--c-violet), transparent 78%);
}

.page-faq .faq-quick__card:nth-child(3)::before {
  background: linear-gradient(180deg, var(--c-orange), transparent 78%);
}

.page-faq .faq-quick__card:nth-child(4)::before {
  background: linear-gradient(180deg, var(--c-bind), transparent 78%);
}

.page-faq .faq-quick__card:hover {
  transform: translateY(-3px);
  border-color: var(--faq-cyan-soft);
}

.page-faq .faq-quick__card .u-index {
  display: block;
  margin-bottom: 12px;
  color: var(--c-cyan);
  letter-spacing: 0.12em;
}

.page-faq .faq-quick__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-paper);
}

.page-faq .faq-quick__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(243, 233, 218, 0.78);
}

/* ============ 更新记录 ============ */

.page-faq .faq-update {
  background: linear-gradient(180deg, var(--c-night), var(--c-ink));
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-update__strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(26px, 4vw, 44px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-line);
}

.page-faq .faq-update__strip .data-strip__cell {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 20px 18px;
  background: rgba(5, 12, 26, 0.9);
}

.page-faq .faq-update__strip .data-strip__value {
  font-family: var(--font-index);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-cyan);
}

.page-faq .faq-update__strip .data-strip__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-mist);
}

.page-faq .faq-update__grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

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

.page-faq .faq-update__title {
  margin: 0 0 14px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--c-paper);
}

.page-faq .faq-update__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(243, 233, 218, 0.82);
}

.page-faq .faq-update__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-faq .faq-update__item {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: rgba(20, 38, 74, 0.5);
}

.page-faq .faq-update__marker {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--c-orange);
  box-shadow: 0 0 0 4px rgba(255, 139, 61, 0.14);
}

.page-faq .faq-update__item h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-faq .faq-update__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(243, 233, 218, 0.76);
}

.page-faq .faq-update__item a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(77, 227, 210, 0.45);
}

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

/* ============ 兜底求助 ============ */

.page-faq .faq-help {
  background: var(--c-ink);
  border-top: 1px solid var(--c-line);
  padding-bottom: clamp(48px, 7vw, 84px);
}

.page-faq .faq-help__head {
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 16px;
}

.page-faq .faq-help__card {
  padding: clamp(22px, 3vw, 30px);
}

.page-faq .faq-help__card .u-index {
  display: block;
  margin-bottom: 12px;
  color: var(--c-bind);
  letter-spacing: 0.12em;
}

.page-faq .faq-help__cardTitle {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-brown);
}

.page-faq .faq-help__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(26, 20, 16, 0.82);
  word-break: break-word;
}

.page-faq .faq-help__more {
  margin: clamp(26px, 4vw, 40px) 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.95;
  color: rgba(243, 233, 218, 0.8);
}

.page-faq .faq-help__more a {
  color: var(--c-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 139, 61, 0.5);
}

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

/* ============ 响应式 ============ */

@media (min-width: 700px) {
  .page-faq .faq-apple__notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-faq .faq-update__strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  }

  .page-faq .faq-index__layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }

  .page-faq .faq-index__rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-cats {
    flex-direction: column;
    flex-wrap: nowrap;
  }

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

  .page-faq .faq-apple__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.88fr);
  }

  .page-faq .faq-update__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-hero__media {
    transform: translateY(-6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero::after {
    animation: none;
  }

  .page-faq .faq-cats__link,
  .page-faq .faq-quick__card,
  .page-faq .faq-item__mark::after {
    transition: none;
  }

  .page-faq .faq-cats__link:hover,
  .page-faq .faq-quick__card:hover {
    transform: none;
  }
}