.page-faq {
  --faq-index: 236px;
  --faq-shadow: 8px 8px 0 0 #030C09;
  --faq-open: #122E25;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .faq-shell,
.page-faq .faq-hero__inner,
.page-faq .faq-body {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--data);
  text-transform: uppercase;
}

.page-faq .faq-crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-faq .faq-crumb span[aria-current] {
  color: var(--signal);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 1.5px solid var(--line);
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 72%);
}

.page-faq .faq-hero__inner {
  padding-block: clamp(24px, 4vw, 48px) clamp(22px, 3.6vw, 40px);
}

.page-faq .faq-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-faq .faq-tag::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--signal);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 66px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--signal);
}

.page-faq .faq-hero__lead {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 44px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(21px, 3vw, 27px);
  line-height: 1.1;
  color: var(--signal);
}

.page-faq .faq-num small {
  font-size: .48em;
  margin-left: 2px;
}

.page-faq .faq-hero__facts li > span:last-child {
  font-size: 12.5px;
  color: var(--data);
  letter-spacing: .02em;
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-top: 1.5px solid var(--line);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(160px, 30vw, 340px);
  object-fit: cover;
  object-position: center 60%;
  filter: saturate(.82) contrast(1.08) brightness(.85);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(5, 16, 13, .42) 0 1px, rgba(5, 16, 13, 0) 1px 4px);
  box-shadow: inset 0 0 120px rgba(5, 16, 13, .85);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  padding-block: clamp(26px, 4.5vw, 54px) clamp(48px, 8vw, 96px);
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--data);
}

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

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

.page-faq .faq-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s ease, border-color .18s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--signal);
  border-color: var(--signal);
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--signal);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(18px, 3vw, 28px);
  border-top: 1.5px solid var(--line);
  scroll-margin-top: 24px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(32px, 5vw, 56px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: baseline;
  margin-bottom: 18px;
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1;
  color: var(--signal);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .faq-group__head p {
  grid-column: 2;
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-group__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  background: var(--panel);
  border: 1.5px solid var(--line);
  border-left: 4px solid var(--line);
  box-shadow: var(--faq-shadow);
  transition: border-color .18s ease, background .18s ease;
}

.page-faq .faq-item[open] {
  border-left-color: var(--signal);
  background: var(--faq-open);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary:hover {
  color: var(--signal-2);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .faq-item > summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--signal);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--signal-2);
}

.page-faq .faq-item__a {
  margin: 0 16px;
  padding: 14px 0 16px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 出口链接 ---------- */
.page-faq .faq-group__out {
  margin: 18px 0 0;
}

.page-faq .faq-group__out a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 3px;
  border-bottom: 1px dashed var(--line);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--signal);
  text-decoration: none;
  transition: border-color .18s ease;
}

.page-faq .faq-group__out a::after {
  content: "→";
  font-family: var(--font-mono);
}

.page-faq .faq-group__out a:hover,
.page-faq .faq-group__out a:focus-visible {
  border-bottom-color: var(--signal);
}

.page-faq .faq-group__alt {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--data);
}

.page-faq .faq-group__alt a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__alt a:hover,
.page-faq .faq-group__alt a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 分组配图 ---------- */
.page-faq .faq-group__media {
  margin: 0;
  border: 1.5px solid var(--line);
  background: var(--panel);
  align-self: start;
}

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

.page-faq .faq-group__media figcaption {
  padding: 8px 10px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--data);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-group--media .faq-group__body {
    grid-template-columns: minmax(0, 1fr) 190px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-index) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 60px);
  }

  .page-faq .faq-body::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    width: 12px;
    pointer-events: none;
    background: repeating-linear-gradient(180deg, var(--line) 0 1px, transparent 1px 24px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-index__list a {
    width: 100%;
    padding: 10px 12px;
    border: 0;
    border-left: 2px solid var(--line);
    background: transparent;
    font-size: 13.5px;
    white-space: normal;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-left-color: var(--signal);
    background: rgba(198, 255, 46, .06);
    color: var(--signal);
  }

  .page-faq .faq-item > summary {
    font-size: 15.5px;
    padding: 16px 18px;
  }

  .page-faq .faq-item__a {
    margin: 0 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-index__list a,
  .page-faq .faq-group__out a {
    transition: none;
  }
}