.page-faq {
  display: block;
  background: var(--k1-bg);
  color: var(--k1-text);
  font-family: var(--k1-body);
  line-height: 1.75;
  padding-bottom: 84px;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq .faq-wrap {
  max-width: var(--k1-shell);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: 26px;
  padding: 34px 0 44px;
  border-bottom: 1px solid var(--k1-line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 300px;
  background: linear-gradient(146deg, rgba(198, 255, 61, 0.11) 0%, rgba(47, 230, 200, 0.06) 44%, rgba(7, 19, 15, 0) 76%);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.page-faq .faq-crumb__link {
  color: var(--k1-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s var(--k1-ease), border-color 0.15s var(--k1-ease);
}

.page-faq .faq-crumb__link:hover {
  color: var(--k1-lime);
  border-bottom-color: var(--k1-lime-30);
}

.page-faq .faq-crumb__sep {
  color: var(--k1-line-strong);
}

.page-faq .faq-crumb__now {
  color: var(--k1-text);
  font-family: var(--k1-mono);
  letter-spacing: 0.1em;
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-family: var(--k1-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--k1-muted);
  text-transform: uppercase;
}

.page-faq .faq-kicker .k1-mono {
  color: var(--k1-lime);
}

.page-faq h1 {
  margin: 0 0 16px;
  font-family: var(--k1-display);
  font-size: clamp(27px, 6.4vw, 50px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 18em;
}

.page-faq .faq-lead {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--k1-muted);
  max-width: 46em;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero__fig {
  margin: 0;
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  background: var(--k1-panel);
  overflow: hidden;
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-faq .faq-hero__cap,
.page-faq .faq-figure__cap {
  padding: 10px 14px;
  font-family: var(--k1-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--k1-muted);
  border-top: 1px solid var(--k1-line);
  background: var(--k1-panel-2);
}

/* ---------- 主体两列 ---------- */
.page-faq .faq-body {
  padding-top: 30px;
}

.page-faq .faq-rail {
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  background: var(--k1-panel);
  padding: 12px;
  margin-bottom: 30px;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--k1-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--k1-lime);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  color: var(--k1-muted);
  font-size: 13px;
  text-decoration: none;
  scroll-snap-align: start;
  transition: color 0.15s var(--k1-ease), border-color 0.15s var(--k1-ease), background 0.15s var(--k1-ease);
}

.page-faq .faq-rail__link:hover {
  color: var(--k1-text);
  background: var(--k1-panel-2);
  border-color: var(--k1-line-strong);
}

.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--k1-lime);
  outline-offset: 2px;
}

.page-faq .faq-rail__num {
  font-family: var(--k1-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--k1-lime);
}

.page-faq .faq-rail__count {
  font-family: var(--k1-mono);
  font-size: 11px;
  color: var(--k1-cyan);
}

.page-faq .faq-rail__note {
  display: none;
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--k1-line-soft);
  font-size: 12px;
  line-height: 1.7;
  color: var(--k1-muted);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-top: 30px;
  scroll-margin-top: 20px;
}

.page-faq .faq-group:first-child {
  padding-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--k1-line);
}

.page-faq .faq-group__index {
  font-family: var(--k1-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--k1-lime);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--k1-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--k1-text);
}

.page-faq .faq-group__tag {
  margin-left: auto;
  font-family: var(--k1-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--k1-muted);
}

/* ---------- 问答卡 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  background: var(--k1-panel);
  transition: border-color 0.18s var(--k1-ease), background 0.18s var(--k1-ease), transform 0.18s var(--k1-ease);
}

.page-faq .faq-item:hover {
  transform: translateY(-2px);
  border-color: var(--k1-line-strong);
}

.page-faq .faq-item[open] {
  background: var(--k1-panel-2);
  border-color: var(--k1-line-strong);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 15px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--k1-lime);
  outline-offset: -2px;
  border-radius: var(--k1-r);
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--k1-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--k1-muted);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--k1-text);
}

.page-faq .faq-item__arrow {
  flex: 0 0 auto;
  margin-top: 5px;
  color: var(--k1-muted);
  transition: transform 0.2s var(--k1-ease), color 0.2s var(--k1-ease);
}

.page-faq .faq-item[open] .faq-item__arrow {
  transform: rotate(180deg);
  color: var(--k1-lime);
}

.page-faq .faq-item__a {
  padding: 12px 15px 16px;
  border-top: 1px solid var(--k1-line-soft);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--k1-muted);
}

/* ---------- 订阅章节配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 14px;
  border: 1px solid var(--k1-line);
  border-radius: var(--k1-r);
  background: var(--k1-panel);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-faq .faq-figure__cap .k1-mono {
  color: var(--k1-orange);
}

/* ---------- 还需要帮助 ---------- */
.page-faq .faq-help {
  border: 1px solid var(--k1-line-strong);
  border-radius: var(--k1-r);
  background:
    linear-gradient(135deg, rgba(198, 255, 61, 0.09) 0%, rgba(198, 255, 61, 0) 62%),
    var(--k1-panel);
  padding: 20px 16px;
}

.page-faq .faq-help__lead {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--k1-text);
}

.page-faq .faq-help__list {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--k1-line-soft);
}

.page-faq .faq-help__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--k1-line-soft);
}

.page-faq .faq-help__key {
  flex: 0 0 62px;
  font-family: var(--k1-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--k1-lime);
  padding-top: 3px;
}

.page-faq .faq-help__val {
  flex: 1 1 200px;
  font-size: 14.5px;
  color: var(--k1-text);
  word-break: break-word;
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-wrap {
    padding: 0 32px;
  }

  .page-faq .faq-hero {
    padding: 48px 0 56px;
    gap: 34px;
  }

  .page-faq .faq-item__q {
    padding: 16px 20px;
    gap: 16px;
  }

  .page-faq .faq-item__a {
    padding: 14px 20px 18px 52px;
  }

  .page-faq .faq-help {
    padding: 26px 24px;
  }

  .page-faq .faq-group {
    padding-top: 42px;
  }

  .page-faq .faq-group__title {
    font-size: 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 44px;
  }

  .page-faq .faq-hero__fig {
    margin-top: -6px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    display: grid;
    grid-template-columns: 258px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 46px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 22px;
    margin-bottom: 0;
    padding: 18px 12px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    scroll-snap-type: none;
  }

  .page-faq .faq-rail__link {
    display: flex;
    width: 100%;
    white-space: normal;
    border-color: transparent;
    border-left: 2px solid var(--k1-line);
    border-radius: 0 var(--k1-r) var(--k1-r) 0;
    padding: 7px 10px;
    line-height: 1.45;
  }

  .page-faq .faq-rail__link:hover {
    border-left-color: var(--k1-lime);
    background: var(--k1-panel-2);
  }

  .page-faq .faq-rail__count {
    margin-left: auto;
  }

  .page-faq .faq-rail__note {
    display: block;
  }

  .page-faq .faq-group {
    padding-top: 52px;
    scroll-margin-top: 28px;
  }

  .page-faq .faq-group:first-child {
    padding-top: 0;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-body {
    gap: 64px;
  }

  .page-faq .faq-item__text {
    font-size: 15.5px;
  }
}