.page-faq {
  --faq-num-col: 34px;
  --faq-vgap: clamp(56px, 8vw, 96px);
  background-color: var(--ink-950);
  background-image:
    radial-gradient(120% 58% at 84% 0%, var(--glow-cyan) 0%, transparent 56%),
    linear-gradient(180deg, #071613 0%, #0A1E1A 56%, #071613 100%);
  color: var(--concrete-200);
  overflow-x: hidden;
}

.page-faq .faq-shell {
  padding-top: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(72px, 10vw, 140px);
}

.page-faq .crumbs {
  margin-bottom: clamp(26px, 4vw, 52px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero__annot {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--concrete-500);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 0.98;
  color: var(--paint-050);
}

.page-faq .faq-hero__title::after {
  content: "";
  display: block;
  width: 104px;
  height: 4px;
  margin-top: 20px;
  background: linear-gradient(90deg, var(--signal-500), var(--neon-400));
}

.page-faq .faq-hero__row {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(22px, 3vw, 36px);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 34em;
  color: var(--concrete-200);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-fact {
  display: grid;
  grid-template-columns: minmax(72px, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-fact:last-child {
  border-bottom: 0;
}

.page-faq .faq-fact__num {
  font-family: var(--font-data);
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: 700;
  color: var(--signal-500);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.page-faq .faq-fact__label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--concrete-500);
}

/* ---------- 视觉占位 ---------- */
.page-faq .faq-visual {
  margin: clamp(26px, 4vw, 46px) 0 0;
}

.page-faq .faq-visual--inner {
  margin: clamp(20px, 3vw, 30px) 0 clamp(8px, 1.4vw, 14px);
}

.page-faq .faq-visual .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
}

.page-faq .faq-visual .media-frame__caption {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--concrete-500);
  max-width: 52em;
}

/* ---------- 类别条 ---------- */
.page-faq .faq-cats {
  margin-top: clamp(24px, 3.5vw, 40px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 16px 20px;
  background: linear-gradient(100deg, rgba(18, 53, 42, 0.72), rgba(27, 33, 31, 0.34));
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--turf-700);
}

.page-faq .faq-cats__label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--neon-400);
  white-space: nowrap;
}

.page-faq .faq-cats__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-cats__item {
  padding: 4px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--concrete-200);
  background: rgba(7, 22, 19, 0.55);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  margin-top: var(--faq-vgap);
}

.page-faq .faq-head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 18px;
  padding-bottom: 16px;
}

.page-faq .faq-head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--signal-500) 0,
    var(--signal-500) 64px,
    var(--line-strong) 64px,
    var(--line-strong) 100%
  );
}

.page-faq .faq-head__num {
  font-family: var(--font-data);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--signal-500);
}

.page-faq .faq-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.5vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paint-050);
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  margin-top: 4px;
}

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

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: var(--faq-num-col) minmax(0, 1fr) 20px;
  align-items: center;
  gap: 10px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.55;
  color: var(--paint-050);
  transition: color 0.2s var(--ease);
}

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

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

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

.page-faq .faq-item:hover > .faq-item__q {
  color: var(--neon-400);
}

.page-faq .faq-item__idx {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--concrete-500);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-item[open] > .faq-item__q .faq-item__idx {
  color: var(--signal-500);
}

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

.page-faq .faq-item__mark {
  position: relative;
  justify-self: end;
  width: 16px;
  height: 16px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--neon-400);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-faq .faq-item__mark::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

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

.page-faq .faq-item__a {
  padding: 0 6px 20px 44px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--concrete-200);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 42em;
}

.page-faq .faq-note {
  margin: 22px 0 0;
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--concrete-200);
  background: rgba(18, 53, 42, 0.45);
  border-left: 3px solid var(--amber-400);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-cats {
    padding: 14px 14px;
  }

  .page-faq .faq-cats__label {
    letter-spacing: 0.14em;
  }

  .page-faq .faq-item__q {
    grid-template-columns: 28px minmax(0, 1fr) 18px;
    gap: 8px;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding: 0 4px 18px 36px;
  }

  .page-faq .faq-fact {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 768px) {
  .page-faq {
    --faq-num-col: 52px;
  }

  .page-faq .faq-item__q {
    grid-template-columns: var(--faq-num-col) minmax(0, 1fr) 24px;
    gap: 14px;
    padding: 22px 4px;
    font-size: 19px;
  }

  .page-faq .faq-item__a {
    padding: 0 64px 26px 66px;
    font-size: 16.5px;
  }

  .page-faq .faq-item__mark {
    width: 18px;
    height: 18px;
  }

  .page-faq .faq-item__mark::before {
    top: 8px;
    width: 18px;
  }

  .page-faq .faq-item__mark::after {
    left: 8px;
    height: 18px;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-hero__row {
    grid-template-columns: minmax(0, 7fr) minmax(240px, 3fr);
    gap: clamp(34px, 5vw, 72px);
  }

  .page-faq .faq-hero__facts {
    border-top: 0;
    border-left: 1px solid var(--line-soft);
    padding-left: 4px;
  }

  .page-faq .faq-fact {
    padding-left: 18px;
  }

  .page-faq .faq-chapter {
    padding-left: 8px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-item__a {
    padding-right: 140px;
  }

  .page-faq .faq-visual--inner .media-frame__img {
    max-height: 360px;
  }
}