.page-faq {
  --faq-accent: var(--c-turquoise);
  --faq-hair: rgba(241, 235, 221, .12);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 6vw, 76px) 0 clamp(26px, 4vw, 52px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -26%;
  right: -12%;
  width: min(640px, 74vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 58% 42%, rgba(30, 124, 108, .32), transparent 62%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  top: 12%;
  bottom: 14%;
  width: 3px;
  background: linear-gradient(180deg, var(--c-crimson), var(--c-gold) 42%, var(--c-turquoise) 78%, var(--c-indigo));
  opacity: .75;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: end;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
}

.page-faq .breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-faq .breadcrumb a:hover {
  color: var(--c-bright);
}

.page-faq .faq-hero .eyebrow {
  color: var(--c-gold);
  letter-spacing: .14em;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-size: clamp(2rem, 5.4vw, 3.3rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--ink);
  max-width: 22ch;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-faint);
}

.page-faq .faq-hero__meta .mono {
  margin-right: 5px;
  color: var(--c-gold);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--hair);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-indigo);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 800;
  object-fit: cover;
}

/* ============ 分组跳转栏 ============ */
.page-faq .faq-jump {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  padding: 14px 0;
  border-top: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
  background: linear-gradient(180deg, rgba(19, 30, 58, .92), rgba(12, 14, 19, .86));
  backdrop-filter: blur(8px);
}

.page-faq .faq-jump__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
}

.page-faq .faq-jump__label {
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--ink-faint);
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--hair);
  border-radius: 999px;
  background: rgba(12, 14, 19, .6);
  color: var(--ink-soft);
  font-size: 13.5px;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-chip::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--faq-dot, var(--c-turquoise));
}

.page-faq .faq-chip--register { --faq-dot: var(--c-crimson); }
.page-faq .faq-chip--login { --faq-dot: var(--c-turquoise); }
.page-faq .faq-chip--version { --faq-dot: var(--c-gold); }
.page-faq .faq-chip--feedback { --faq-dot: var(--c-clay); }
.page-faq .faq-chip--help { --faq-dot: var(--c-bright); }

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible,
.page-faq .faq-chip[aria-current] {
  color: var(--ink);
  border-color: var(--c-bright);
  background: rgba(30, 124, 108, .22);
}

.page-faq .faq-chip:focus-visible {
  outline: 2px solid var(--c-bright);
  outline-offset: 2px;
}

/* ============ 问答分组 ============ */
.page-faq .faq-group {
  padding: clamp(34px, 6vw, 74px) 0;
}

.page-faq .faq-group--login { --faq-accent: var(--c-turquoise); }
.page-faq .faq-group--version { --faq-accent: var(--c-gold); }
.page-faq .faq-group--feedback { --faq-accent: var(--c-clay); }
.page-faq .faq-group--help { --faq-accent: var(--c-bright); }

.page-faq .faq-group__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 30px);
  padding-left: 18px;
  border-left: 3px solid var(--faq-accent, var(--c-turquoise));
}

.page-faq .faq-group__no {
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--faq-accent, var(--c-turquoise));
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink);
}

.page-faq .faq-group__desc {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ============ 折叠问答 ============ */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-hair);
}

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

.page-faq .faq-item__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 12px;
  padding: 17px 4px;
  border-radius: var(--r-sm);
  cursor: pointer;
  list-style: none;
  transition: background .2s var(--ease);
}

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

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

.page-faq .faq-item__head:hover {
  background: rgba(19, 30, 58, .5);
}

.page-faq .faq-item__head:focus-visible {
  outline: 2px solid var(--c-bright);
  outline-offset: 2px;
}

.page-faq .faq-item__no {
  padding-top: 4px;
  min-width: 2.2em;
  font-size: 12.5px;
  color: var(--faq-accent, var(--c-turquoise));
}

.page-faq .faq-item__q {
  font-size: clamp(15px, 1.6vw, 16.5px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item__sign {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 6px;
  flex: none;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--faq-accent, var(--c-turquoise));
  border-radius: 2px;
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.page-faq .faq-item__sign::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 2px 4px 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 78ch;
}

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

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

.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  counter-increment: faqstep;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-gold);
}

/* ============ 客服渠道 ============ */
.page-faq .faq-group--help {
  border-top: 1px solid var(--faq-hair);
  background: linear-gradient(180deg, rgba(19, 30, 58, .45), rgba(12, 14, 19, 0));
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-faq .faq-channels {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-channel {
  display: grid;
  gap: 6px;
  padding: 16px 20px;
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
  background: rgba(19, 30, 58, .55);
}

.page-faq .faq-channel__label {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--ink-faint);
}

.page-faq .faq-channel__value {
  font-family: var(--font-mono);
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

.page-faq .faq-help__figure {
  margin: 0;
  border: 1px solid var(--hair);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-indigo);
}

.page-faq .faq-help__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 700;
  object-fit: cover;
}

/* ============ 问答索引 ============ */
.page-faq .faq-index {
  padding: clamp(40px, 6vw, 80px) 0 clamp(52px, 7vw, 92px);
  border-top: 1px solid var(--faq-hair);
  background-color: #0A1428;
  background-image:
    linear-gradient(rgba(241, 235, 221, .034) 1px, transparent 1px),
    linear-gradient(90deg, rgba(241, 235, 221, .034) 1px, transparent 1px);
  background-size: 46px 46px;
}

.page-faq .faq-index__head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-index__head .eyebrow {
  color: var(--c-gold);
  letter-spacing: .14em;
}

.page-faq .faq-index__title {
  margin: 10px 0 0;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink);
}

.page-faq .faq-index__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 34px);
}

.page-faq .faq-index__col {
  padding-top: 14px;
  border-top: 2px solid var(--c-turquoise);
}

.page-faq .faq-index__col--register { border-top-color: var(--c-crimson); }
.page-faq .faq-index__col--login { border-top-color: var(--c-turquoise); }
.page-faq .faq-index__col--version { border-top-color: var(--c-gold); }
.page-faq .faq-index__col--feedback { border-top-color: var(--c-clay); }

.page-faq .faq-index__col-title {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-faq .faq-index__list a {
  display: block;
  padding: 5px 0;
  border-bottom: 1px dashed rgba(241, 235, 221, .09);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--c-bright);
  padding-left: 6px;
}

.page-faq .faq-index__foot {
  margin: clamp(26px, 3vw, 38px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--hair-soft);
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-faint);
}

.page-faq .faq-index__foot a {
  color: var(--c-turquoise);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .2s var(--ease);
}

.page-faq .faq-index__foot a:hover {
  color: var(--c-bright);
}

/* ============ 响应式 ============ */
@media (min-width: 680px) {
  .page-faq .faq-item__body {
    padding-left: calc(2.2em + 14px);
  }

  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-help__grid {
    grid-template-columns: 5fr 4fr;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-hero__figure {
    transform: translateY(12px);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

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