.page-faq {
  --faq-line: rgba(244, 247, 242, 0.14);
  --faq-line-strong: rgba(244, 247, 242, 0.28);
  --faq-panel: rgba(20, 69, 47, 0.5);
  background-color: var(--turf-deep);
  color: var(--cold);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 1.75rem 0 3rem;
  border-bottom: 1px solid var(--faq-line);
  background-image:
    radial-gradient(140% 110% at 94% -12%, rgba(43, 47, 94, 0.9) 0%, rgba(43, 47, 94, 0) 58%),
    linear-gradient(180deg, rgba(11, 42, 30, 1) 0%, rgba(11, 42, 30, 1) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 247, 242, 0.045) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(244, 247, 242, 0.035) 0 1px, transparent 1px 96px);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: 2rem;
}

.page-faq .faq-hero__index {
  margin: 1.25rem 0 0;
  color: var(--lime);
}

.page-faq .faq-hero__title {
  margin: 0.7rem 0 0;
  max-width: 20ch;
  color: var(--cold);
  letter-spacing: -0.015em;
}

.page-faq .faq-hero__lede {
  margin: 1.15rem 0 0;
  max-width: 52ch;
  color: rgba(244, 247, 242, 0.74);
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__media {
  margin: 0;
  padding: 0.5rem;
  border: 1px solid var(--faq-line-strong);
  background-color: rgba(20, 69, 47, 0.55);
}

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

/* ---------- 索引 + 问答主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 2.25rem;
  padding: 2.5rem 0 4rem;
}

.page-faq .faq-index {
  padding-top: 0.85rem;
  border-top: 2px solid var(--lime);
}

.page-faq .faq-index__label {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.5rem;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--faq-line);
  color: var(--cold);
  font-size: 0.875rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-index__link:hover {
  color: var(--lime);
  border-color: var(--lime);
  background-color: rgba(198, 255, 74, 0.07);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--lime);
}

.page-faq .faq-panels {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  min-width: 0;
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 6rem;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding-bottom: 0.9rem;
  margin-bottom: 1.35rem;
  border-bottom: 1px solid var(--faq-line-strong);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 1.5vw + 0.85rem, 1.8rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--cold);
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 1.35rem;
  padding: 0.5rem;
  border: 1px solid var(--faq-line);
  background-color: rgba(20, 69, 47, 0.45);
}

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

.page-faq .faq-figure__caption {
  margin-top: 0.6rem;
  padding: 0 0.2rem 0.1rem;
  font-size: 0.75rem;
  line-height: 1.65;
  color: var(--gray);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  background-image: linear-gradient(180deg, rgba(20, 69, 47, 0.55) 0%, rgba(11, 42, 30, 0.92) 100%);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-faq .faq-item + .faq-item {
  margin-top: 0.65rem;
}

.page-faq .faq-item:hover {
  border-color: rgba(198, 255, 74, 0.45);
}

.page-faq .faq-item[open] {
  border-color: rgba(198, 255, 74, 0.7);
  box-shadow: inset 3px 0 0 var(--lime);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  list-style: none;
  font-size: 0.9875rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--cold);
}

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

.page-faq .faq-item__q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 0.85rem;
  height: 0.85rem;
  margin-top: 0.38rem;
  margin-left: auto;
}

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

.page-faq .faq-item__icon::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-item__icon::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 1.15rem 1.25rem;
  color: rgba(244, 247, 242, 0.8);
  font-size: 0.9375rem;
  line-height: 1.8;
}

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

.page-faq .faq-item__a p + p {
  margin-top: 0.8rem;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover {
  color: var(--lime);
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--lime);
  letter-spacing: -0.01em;
}

/* ---------- 联系信息 ---------- */
.page-faq .faq-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

/* ---------- 全宽数据带 ---------- */
.page-faq .faq-band {
  padding: 1.85rem 1.35rem 2rem;
  border-top: 1px solid rgba(115, 210, 222, 0.4);
  border-bottom: 1px solid rgba(115, 210, 222, 0.4);
  background-image: linear-gradient(102deg, rgba(43, 47, 94, 0.92) 0%, rgba(23, 26, 51, 0.96) 52%, rgba(11, 42, 30, 0.7) 100%);
}

.page-faq .faq-band__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.page-faq .faq-band__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  color: var(--cold);
}

.page-faq .faq-band__meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-band__list {
  display: grid;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-band__step {
  position: relative;
  padding-top: 1.6rem;
  border-top: 1px solid rgba(244, 247, 242, 0.18);
}

.page-faq .faq-band__step::before {
  counter-increment: faqstep;
  content: "0" counter(faqstep);
  position: absolute;
  top: 0.35rem;
  left: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-faq .faq-band__step-title {
  margin: 0 0 0.4rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--cold);
}

.page-faq .faq-band__step-text {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(244, 247, 242, 0.72);
}

/* ---------- 窄屏以上 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: 2.25rem 0 3.5rem;
  }

  .page-faq .faq-item__q {
    padding: 1.1rem 1.35rem;
    font-size: 1.05rem;
  }

  .page-faq .faq-item__a {
    padding: 0 1.35rem 1.4rem;
  }

  .page-faq .faq-band {
    padding: 2.25rem 1.85rem 2.4rem;
  }

  .page-faq .faq-band__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面端：左侧索引 + 右侧问答 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 3.5rem;
    align-items: end;
  }

  .page-faq .faq-body {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: 4rem;
    align-items: start;
    padding: 3.25rem 0 5rem;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 6rem;
    border-top: 0;
    border-left: 1px solid var(--faq-line);
    padding-top: 0;
    padding-left: 1rem;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    width: 100%;
    padding: 0.55rem 0 0.55rem 0.9rem;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1rem;
    font-size: 0.9375rem;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover {
    border-left-color: var(--lime);
    background-color: rgba(198, 255, 74, 0.06);
  }

  .page-faq .faq-band__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-body {
    grid-template-columns: 17rem minmax(0, 1fr);
  }
}

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