.page-faq {
  --faq-panel: #101C3A;
  --faq-line: #26375F;
  --faq-text-soft: #C3CDE0;
  --faq-r: 4px;
  --faq-edge: clamp(16px, 3.4vw, 40px);
  --faq-gap: clamp(18px, 3vw, 36px);
}

.page-faq .breadcrumb {
  padding-block: 16px 4px;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .04em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(18px, 3vw, 34px) clamp(34px, 5vw, 64px);
  border-bottom: 2px solid var(--line-600);
  background:
    radial-gradient(115% 88% at 86% 4%, rgba(31, 217, 95, .16), transparent 60%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-700) 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -46px;
  right: -70px;
  width: min(380px, 62vw);
  height: 230px;
  background: repeating-linear-gradient(90deg, var(--grass-700) 0 2px, transparent 2px 13px);
  opacity: .22;
  transform: skewY(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4.5vw, 52px);
  align-items: center;
  min-width: 0;
}

.page-faq .faq-hero__kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding: 5px 11px;
  border: 2px solid var(--neon-500);
  border-radius: var(--faq-r);
  color: var(--neon-500);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 3.7rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white-050);
  max-width: 22ch;
}

.page-faq .faq-hero__text {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.06rem);
  line-height: 1.78;
  color: var(--faq-text-soft);
}

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

/* ---------- 首屏照片 ---------- */
.page-faq .faq-photo {
  position: relative;
  margin: 0;
  border: 2px solid var(--line-600);
  border-radius: var(--faq-r);
  overflow: hidden;
  background: var(--ink-900);
  box-shadow: var(--shadow-hard-ink);
}

.page-faq .faq-photo img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 6;
  object-fit: cover;
  filter: saturate(.9) contrast(1.06);
}

.page-faq .faq-photo__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(0deg, rgba(8, 15, 34, .94), rgba(8, 15, 34, 0));
  color: var(--white-050);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .03em;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
  padding-top: clamp(30px, 5vw, 58px);
  min-width: 0;
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-index {
  border: 2px solid var(--line-600);
  border-radius: var(--faq-r);
  background: var(--faq-panel);
  box-shadow: var(--shadow-hard-ink);
  padding: 16px 14px 14px;
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--steel-400);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 2px solid transparent;
  border-radius: var(--faq-r);
  color: var(--white-050);
  font-weight: 700;
  font-size: .9rem;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-index__link:hover {
  border-color: var(--grass-500);
  background: rgba(31, 217, 95, .1);
  color: var(--grass-500);
}

.page-faq .faq-index__link:focus-visible {
  outline: 3px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .05em;
  color: var(--neon-500);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 2px dashed var(--line-600);
  font-size: .84rem;
  line-height: 1.7;
  color: var(--steel-400);
  overflow-wrap: anywhere;
}

/* ---------- 分组 ---------- */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: clamp(38px, 6vw, 68px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--grass-700);
  position: relative;
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 68px;
  height: 6px;
  background: var(--neon-500);
}

.page-faq .faq-group__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.6vw, 2rem);
  line-height: 1.05;
  color: var(--grass-500);
  letter-spacing: .02em;
}

.page-faq .faq-group__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 3.4vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white-050);
}

.page-faq .faq-group__sub {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--steel-400);
}

/* ---------- 说明图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 2px solid var(--line-600);
  border-radius: var(--faq-r);
  overflow: hidden;
  background: var(--ink-700);
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 2px solid var(--line-600);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .03em;
  color: var(--steel-400);
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-item {
  position: relative;
  margin-bottom: 10px;
  border: 2px solid var(--faq-line);
  border-radius: var(--faq-r);
  background: var(--faq-panel);
  transition: border-color .2s var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: -2px;
  top: -2px;
  bottom: -2px;
  width: 6px;
  background: var(--neon-500);
  border-radius: var(--faq-r) 0 0 var(--faq-r);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .24s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--grass-700);
}

.page-faq .faq-item[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-item:hover {
  border-color: var(--grass-500);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 46px 15px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: .99rem;
  line-height: 1.6;
  color: var(--white-050);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--grass-500);
}

.page-faq .faq-item__q:focus-visible {
  outline: 3px solid var(--cyan-400);
  outline-offset: -3px;
}

.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  right: 19px;
  top: 21px;
  width: 10px;
  height: 10px;
  border-right: 3px solid var(--grass-500);
  border-bottom: 3px solid var(--grass-500);
  transform: rotate(45deg);
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(225deg);
  border-color: var(--neon-500);
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  padding-top: .3em;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .05em;
  color: var(--neon-500);
}

.page-faq .faq-item__a {
  margin: 0 18px 18px;
  padding-top: 13px;
  border-top: 2px dashed var(--line-600);
  font-size: .96rem;
  line-height: 1.8;
  color: var(--faq-text-soft);
}

.page-faq .faq-item__a p {
  margin: 0;
}

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

/* ---------- 出口链接 ---------- */
.page-faq .faq-group__exit {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 0;
}

.page-faq .faq-exit {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border: 2px solid var(--grass-700);
  border-radius: var(--faq-r);
  background: rgba(14, 143, 61, .12);
  color: var(--grass-500);
  font-weight: 700;
  font-size: .88rem;
  text-decoration: none;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-exit::after {
  content: "\2192";
  font-family: var(--font-mono);
}

.page-faq .faq-exit:hover {
  transform: translate(2px, -2px);
  box-shadow: var(--shadow-hard);
  background: rgba(31, 217, 95, .18);
}

.page-faq .faq-exit:focus-visible {
  outline: 3px solid var(--cyan-400);
  outline-offset: 2px;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 719px) {
  .page-faq .faq-hero::after {
    opacity: .14;
  }

  .page-faq .faq-photo img {
    aspect-ratio: 4 / 3;
  }

  .page-faq .faq-item__q {
    font-size: .94rem;
    padding-right: 42px;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(260px, .8fr);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(210px, 240px) minmax(0, 1fr);
    gap: clamp(28px, 3.4vw, 52px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: 4px;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    white-space: normal;
  }

  .page-faq .faq-item__q {
    font-size: 1.02rem;
    padding: 17px 50px 17px 20px;
  }

  .page-faq .faq-item__a {
    margin: 0 20px 20px;
    font-size: 1rem;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-hero__title {
    max-width: 18ch;
  }
}