.page-faq {
  --faq-answer: #C9E3DA;
  --faq-rule-gap: 18px;
  display: block;
  color: var(--text);
  padding-bottom: 64px;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 0;
  max-width: var(--shell);
  margin: 0 auto;
  padding-left: var(--gut);
  padding-right: var(--gut);
  font-family: var(--mono);
  font-size: 12px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: 22px;
}

.page-faq .faq-hero__box {
  position: relative;
  border: 2px solid var(--line);
  background:
    radial-gradient(900px 380px at 86% -18%, rgba(0, 240, 200, 0.16), transparent 64%),
    linear-gradient(158deg, var(--panel) 0%, var(--ink) 100%);
  box-shadow: var(--shadow-hard);
  padding: 26px 18px 22px;
}

.page-faq .faq-hero__box::before {
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  top: -2px;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan) 0 64px, var(--violet) 64px 108px, transparent 108px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 22px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 14px;
  font-size: clamp(33px, 8vw, 70px);
  line-height: 1.03;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 34em;
}

.page-faq .faq-hero__aside {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-hero__aside a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid rgba(0, 240, 200, 0.42);
  padding-bottom: 1px;
}

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

.page-faq .faq-hero__fig {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink);
}

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

.page-faq .faq-hero__fig .media__cap,
.page-faq .faq-device .media__cap {
  display: block;
  border-top: 1px solid var(--line);
  background: var(--panel);
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 关键数字 ---------- */
.page-faq .faq-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-stats li {
  background: var(--ink);
  padding: 13px 13px 11px;
}

.page-faq .faq-stats b {
  display: block;
  font-family: var(--mono);
  font-size: 25px;
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-stats span {
  display: block;
  margin-top: 6px;
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 30px;
  margin-top: 38px;
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-nav__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--line);
}

.page-faq .faq-nav__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  border-left: 3px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  border-left-color: var(--cyan);
  background: var(--raise);
  color: var(--cyan-soft);
  outline: none;
}

.page-faq .faq-nav__no {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

.page-faq .faq-nav__link:hover .faq-nav__no,
.page-faq .faq-nav__link:focus-visible .faq-nav__no {
  color: var(--cyan);
}

.page-faq .faq-nav__note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-top: 48px;
  scroll-margin-top: 92px;
}

.page-faq .faq-group:first-child {
  margin-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
}

.page-faq .faq-group__no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink);
  background: var(--cyan);
  padding: 3px 7px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 5vw, 31px);
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.page-faq .faq-group:target .faq-group__title {
  color: var(--cyan);
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
}

.page-faq .faq-group__rule {
  position: relative;
  height: 2px;
  margin-bottom: 6px;
  background: linear-gradient(90deg, var(--cyan) 0 92px, var(--line) 92px 100%);
}

.page-faq .faq-group__rule::after {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  width: 100%;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 24px);
}

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

.page-faq .faq-item {
  border-left: 3px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  transition: border-color 0.2s ease, background 0.2s ease;
}

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

.page-faq .faq-item__head {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 10px;
  padding: 14px 14px;
  background: transparent;
  border: 0;
  color: var(--text);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}

.page-faq .faq-item__head:hover {
  background: rgba(0, 240, 200, 0.07);
}

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

.page-faq .faq-item__no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .faq-item__q {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
}

.page-faq .faq-item__state {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-item[data-open] .faq-item__state {
  color: var(--cyan);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan-soft);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.page-faq .faq-item__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[data-open] .faq-item__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  display: none;
  overflow: hidden;
}

.page-faq .faq-item[data-open] .faq-item__body {
  display: block;
}

.page-faq .faq-item__content {
  padding: 0 16px 18px 16px;
}

.page-faq .faq-item__content p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-answer);
}

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

.page-faq .faq-item__content a:hover,
.page-faq .faq-item__content a:focus-visible {
  color: var(--cyan-soft);
}

.page-faq .faq-num {
  font-family: var(--mono);
  font-size: 1.04em;
  color: var(--orange);
  border-bottom: 2px solid rgba(255, 122, 47, 0.44);
  padding: 0 1px;
}

/* ---------- 平板配图 ---------- */
.page-faq .faq-device {
  margin: 18px 0 20px;
  border: 2px solid var(--line);
  background: var(--ink);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-tail {
  padding-top: 52px;
}

.page-faq .faq-tail__box {
  display: grid;
  gap: 20px;
  border: 2px solid var(--line);
  border-top: 4px solid var(--cyan);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  padding: 24px 20px;
}

.page-faq .faq-tail__title {
  margin: 0 0 8px;
  font-size: clamp(20px, 4.6vw, 28px);
  line-height: 1.25;
}

.page-faq .faq-tail__desc {
  margin: 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-hero__box {
    padding: 34px 30px 28px;
  }

  .page-faq .faq-item__head {
    gap: 16px;
    padding: 16px 18px;
  }

  .page-faq .faq-item__content {
    padding: 0 22px 20px 60px;
  }

  .page-faq .faq-tail__box {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 30px 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 6.1fr) minmax(0, 4.6fr);
    gap: 34px;
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: 288px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
    margin-top: 52px;
  }

  .page-faq .faq-nav {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-group {
    margin-top: 58px;
  }

  .page-faq .faq-device {
    margin: 22px 0 24px;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-hero__box {
    padding: 44px 42px 34px;
  }

  .page-faq .faq-body {
    grid-template-columns: 308px minmax(0, 1fr);
    gap: 56px;
  }
}