.page-faq {
  --faq-rule: rgba(159, 183, 173, 0.26);
  --faq-card-accent: var(--cyan);
  background:
    radial-gradient(1000px 460px at 82% -10%, rgba(63, 242, 198, 0.1), transparent 62%),
    linear-gradient(180deg, var(--night) 0%, #081b15 52%, var(--field) 100%);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(1.1rem, 3vw, 2rem) clamp(1.5rem, 4vw, 3rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.page-faq .faq-hero__copy h1 {
  margin: 0.55rem 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 5.4vw, 3.25rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--warm);
  max-width: 18em;
}

.page-faq .faq-hl {
  color: var(--cyan);
  position: relative;
  white-space: nowrap;
}

.page-faq .faq-hl::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 0.32em;
  background: linear-gradient(90deg, rgba(63, 242, 198, 0.34), rgba(63, 242, 198, 0));
  z-index: -1;
}

.page-faq .faq-hero__copy .lede {
  margin: 0 0 0.7rem;
  color: var(--warm);
  max-width: 34em;
}

.page-faq .faq-hero__sub {
  margin: 0;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.85;
  max-width: 36em;
}

/* 数据带 */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1rem;
  margin-top: clamp(1.1rem, 3vw, 1.6rem);
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-stats__item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.page-faq .faq-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-faq .faq-stats__num--orange {
  color: var(--orange);
}

.page-faq .faq-stats__label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* 快速跳转标签 */
.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-top: clamp(1.1rem, 3vw, 1.6rem);
}

.page-faq .faq-jump__label {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--mist);
  margin-right: 0.2rem;
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: 0.36rem 0.72rem;
  font-size: 0.85rem;
  color: var(--warm);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(20, 58, 49, 0.45);
  transition: color var(--fast) var(--ease), background var(--fast) var(--ease),
    border-color var(--fast) var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--night);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* 首屏图 */
.page-faq .faq-hero__media {
  position: relative;
}

.page-faq .faq-hero__media::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 26px;
  width: 2px;
  height: 62%;
  background: linear-gradient(180deg, var(--orange), transparent);
  opacity: 0.7;
}

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

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding-top: clamp(0.75rem, 2vw, 1.5rem);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-items: start;
}

/* 左侧主题索引 */
.page-faq .faq-index {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(13, 43, 34, 0.9), rgba(7, 19, 15, 0.85));
  padding: 1rem 1.1rem 1.05rem;
}

.page-faq .faq-index__label {
  margin: 0 0 0.6rem;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--mist);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-faq .faq-index__list a {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  padding: 0.48rem 0.15rem;
  font-size: 0.92rem;
  color: var(--warm);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-faq .faq-index__list a .num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--mist);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-strong);
}

.page-faq .faq-index__note {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0.85rem 0 0;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.78rem;
  color: var(--mist);
}

/* ---------- 档案卡 ---------- */
.page-faq .faq-card {
  position: relative;
  z-index: 0;
  margin-bottom: clamp(1rem, 2.6vw, 1.75rem);
  padding: clamp(1.05rem, 2.4vw, 1.7rem);
  background: linear-gradient(168deg, rgba(20, 58, 49, 0.95), rgba(13, 43, 34, 0.98) 62%);
  border: 1px solid var(--line);
  border-left: 3px solid var(--faq-card-accent);
  scroll-margin-top: 6rem;
  box-shadow: 0 24px 48px -38px rgba(0, 0, 0, 0.95);
}

.page-faq .faq-card::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 10px 0 -9px 10px;
  border: 1px solid var(--line-soft);
  background: rgba(28, 74, 58, 0.26);
}

.page-faq .faq-card--b {
  --faq-card-accent: var(--orange);
}

.page-faq .faq-card--c {
  --faq-card-accent: var(--amber);
}

.page-faq .faq-card--d {
  --faq-card-accent: var(--mist);
}

.page-faq .faq-card--e {
  --faq-card-accent: var(--cyan);
}

.page-faq .faq-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.75rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px dashed var(--faq-rule);
}

.page-faq .faq-card__no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--faq-card-accent);
  border: 1px solid currentColor;
  padding: 0.1rem 0.4rem;
}

.page-faq .faq-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.12rem, 2.2vw, 1.42rem);
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-faq .faq-card__tag {
  margin-left: auto;
  font-size: 0.67rem;
  letter-spacing: 0.14em;
  color: var(--faq-card-accent);
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0.16rem 0.55rem 0.12rem;
}

.page-faq .faq-card__intro {
  margin: 0.6rem 0 0.35rem;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
  max-width: 40em;
}

/* 手风琴 */
.page-faq .qa {
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa:first-of-type {
  border-top: 0;
}

.page-faq .qa summary {
  position: relative;
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  padding: 0.8rem 1.65rem 0.8rem 0.1rem;
  cursor: pointer;
  list-style: none;
  font-size: clamp(0.95rem, 1.5vw, 1.04rem);
  font-weight: 600;
  line-height: 1.65;
  color: var(--warm);
  transition: color var(--fast) var(--ease);
}

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

.page-faq .qa summary::after {
  content: "+";
  position: absolute;
  right: 0.1rem;
  top: 0.72rem;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa[open] summary {
  color: var(--cyan);
}

.page-faq .qa[open] summary::after {
  content: "–";
}

.page-faq .qa summary:hover {
  color: var(--cyan);
}

.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mist);
  padding-top: 0.22rem;
}

.page-faq .qa__body {
  padding: 0 1.5rem 1rem 1.85rem;
  border-left: 2px solid var(--line-strong);
  margin-left: 0.15rem;
  animation: faq-drop var(--slow) var(--ease);
}

.page-faq .qa__body p {
  margin: 0 0 0.5rem;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--warm);
  max-width: 38em;
}

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

.page-faq .qa__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 242, 198, 0.45);
}

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

.page-faq .qa__tip {
  margin-top: 0.55rem !important;
  padding-left: 0.7rem;
  border-left: 2px solid var(--orange);
  font-size: 0.84rem !important;
  color: var(--mist) !important;
}

@keyframes faq-drop {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 卡片内图 */
.page-faq .faq-figure {
  margin: 1rem 0 0;
}

.page-faq .faq-figure .media-frame {
  max-width: 100%;
}

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

.page-faq .faq-figure figcaption {
  margin-top: 0.5rem;
  font-size: 0.79rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 底部支持条 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: clamp(1.4rem, 3.5vw, 2.25rem);
  padding: clamp(1.2rem, 3vw, 1.9rem);
  border: 1px solid var(--line-strong);
  background: linear-gradient(118deg, rgba(63, 242, 198, 0.12), rgba(255, 122, 61, 0.07) 68%, transparent 100%);
}

.page-faq .faq-help__copy h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  color: var(--warm);
}

.page-faq .faq-help__copy p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--mist);
  max-width: 40em;
}

.page-faq .faq-help__actions {
  display: flex;
  align-items: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.82fr);
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 244px) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: clamp(5rem, 9vh, 6.5rem);
  }

  .page-faq .faq-card__intro {
    margin-bottom: 0.6rem;
  }
}

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

  .page-faq .faq-jump a,
  .page-faq .qa summary {
    transition: none;
  }
}
</