.page-faq {
  --faq-bar: 6px;
  --faq-q-col: minmax(0, 330px);
  background: var(--night);
  color: var(--warm);
}

.page-faq .crumb-sep {
  color: var(--edge);
  margin: 0 8px;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(44px, 7vw, 88px) 0 clamp(38px, 6vw, 76px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -46%;
  width: min(560px, 62vw);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(200, 255, 61, 0.16), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero .crumbs {
  position: relative;
  z-index: 1;
}

.page-faq .faq-lede {
  position: relative;
  z-index: 1;
  max-width: 64ch;
  margin: 20px 0 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.75;
  color: var(--warm);
}

.page-faq .faq-h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1.14;
  letter-spacing: 0.04em;
  color: var(--warm);
  margin: 0 0 12px;
}

.page-faq .faq-h3 {
  font-family: var(--font-display);
  font-size: clamp(19px, 2vw, 22px);
  line-height: 1.25;
  letter-spacing: 0.03em;
  color: var(--lime);
  margin: 0 0 10px;
}

.page-faq .faq-note {
  max-width: 54ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* 分类入口 */
.page-faq .faq-index {
  padding: clamp(48px, 8vw, 96px) 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-jump {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-jump-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  column-gap: 16px;
  row-gap: 6px;
  padding: 18px 20px;
  border: 2px solid var(--edge);
  background: transparent;
  color: var(--warm);
  text-decoration: none;
  transition: background-color 0.24s var(--ease), border-color 0.24s var(--ease),
    transform 0.24s var(--ease);
}

.page-faq .faq-jump-card:hover,
.page-faq .faq-jump-card:focus-visible {
  background: var(--night);
  border-color: var(--lime);
  transform: translate(-2px, -2px);
}

.page-faq .faq-jump-num {
  grid-area: num;
  align-self: start;
  font-size: 22px;
  line-height: 1.2;
  color: var(--lime);
  letter-spacing: 0.04em;
}

.page-faq .faq-jump-name {
  grid-area: name;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.25;
  letter-spacing: 0.03em;
}

.page-faq .faq-jump-desc {
  grid-area: desc;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .faq-index-visual .frame {
  margin: 0;
}

/* 问答组 */
.page-faq .faq-group,
.page-faq .faq-terms {
  padding: clamp(48px, 8vw, 96px) 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-group-head {
  max-width: 56ch;
  margin: 0 0 clamp(24px, 3.5vw, 40px);
  padding-left: 16px;
  border-left: 3px solid var(--edge);
  transition: border-color 0.24s var(--ease);
}

.page-faq .faq-group:target .faq-group-head {
  border-left-color: var(--lime);
}

.page-faq .faq-list {
  border-top: 1px solid var(--edge);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--edge);
  transition: border-color 0.24s var(--ease);
}

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

.page-faq .faq-q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 0 20px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.35;
  letter-spacing: 0.03em;
  color: var(--warm);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: var(--faq-bar);
  height: 0;
  background: var(--lime);
  transition: height 0.24s var(--ease);
}

.page-faq .faq-item[open] .faq-q::before,
.page-faq .faq-q:hover::before,
.page-faq .faq-q:focus-visible::before {
  height: 1.1em;
}

.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible {
  color: var(--lime);
}

.page-faq .faq-qnum {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 0.35em;
}

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

.page-faq .faq-a {
  max-width: 74ch;
  padding: 0 0 24px 20px;
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--warm);
}

.page-faq .faq-inline-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 2px solid rgba(200, 255, 61, 0.4);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  border-bottom-color: var(--lime);
  color: var(--warm);
}

/* 术语速查 */
.page-faq .faq-terms-banner {
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-faq .faq-dl {
  margin: 0;
  border-top: 1px solid var(--edge);
}

.page-faq .faq-dl-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 14px;
  border-bottom: 1px solid var(--edge);
  transition: background-color 0.2s var(--ease);
}

.page-faq .faq-dl-row:hover {
  background: var(--night);
}

.page-faq .faq-dt {
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-faq .faq-dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--warm);
}

.page-faq .faq-terms-note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 60ch;
}

/* 反馈与联系 */
.page-faq .faq-channels {
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: clamp(24px, 3.5vw, 40px) clamp(20px, 3vw, 36px);
  border: 2px solid var(--edge);
  box-shadow: var(--shadow-hard);
  background: var(--tunnel);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
}

.page-faq .faq-channels-copy p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--warm);
  max-width: 46ch;
}

.page-faq .faq-channel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-channel-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-channel-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-channel-value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--warm);
  word-break: break-word;
}

/* 响应式 */
@media (min-width: 620px) {
  .page-faq .faq-jump {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-channel-item {
    grid-template-columns: minmax(0, 130px) minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-dl-row {
    grid-template-columns: minmax(0, 210px) minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding: 18px 16px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-item[open] {
    display: grid;
    grid-template-columns: var(--faq-q-col) minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-item[open] .faq-q {
    padding-bottom: 28px;
  }

  .page-faq .faq-item[open] .faq-a {
    padding: 20px 0 28px 28px;
    border-left: 1px solid var(--edge);
    max-width: none;
  }

  .page-faq .faq-index-visual {
    margin-top: 12px;
  }
}