.page-faq {
  --faq-line: rgba(169, 199, 189, .24);
  --faq-line-strong: rgba(169, 199, 189, .42);
  --faq-gap: clamp(16px, 2.4vw, 28px);
  position: relative;
}

.page-faq [id^="group-"] {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding: clamp(20px, 3vw, 34px) 0 clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background-image: repeating-linear-gradient(90deg, var(--mint) 0 1px, transparent 1px 22px);
  opacity: .32;
  pointer-events: none;
}

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

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 1.12;
  letter-spacing: -.02em;
  max-width: 18ch;
}

.page-faq .faq-hero__intro {
  margin: 18px 0 0;
  color: rgba(242, 239, 230, .82);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 24px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 92px;
}

.page-faq .faq-hero__stat dt {
  font-size: 12px;
  color: var(--mono-gray);
  letter-spacing: .04em;
}

.page-faq .faq-hero__stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__stat dd b {
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--faq-line-strong);
  background: linear-gradient(150deg, rgba(28, 68, 55, .95), rgba(11, 43, 34, .95));
  position: relative;
}

.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  right: -6px;
  bottom: -6px;
  width: 42px;
  height: 42px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  opacity: .55;
  pointer-events: none;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

/* ---------- 索引网格 ---------- */

.page-faq .faq-index {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-top: clamp(22px, 3vw, 36px);
}

.page-faq .faq-index__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 14px 14px 16px;
  border: 1px solid var(--faq-line);
  background: rgba(28, 68, 55, .5);
  color: var(--bone);
  text-decoration: none;
  transition: border-color .18s var(--ease), background-color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-index__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .22s var(--ease);
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  border-color: var(--faq-line-strong);
  background: rgba(28, 68, 55, .8);
  transform: translateY(-2px);
}

.page-faq .faq-index__item:hover::after,
.page-faq .faq-index__item:focus-visible::after {
  transform: scaleY(1);
}

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

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mono-gray);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-index__name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

/* ---------- 筛选 chips ---------- */

.page-faq .faq-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: clamp(20px, 3vw, 32px);
  padding-bottom: 4px;
}

.page-faq .faq-tools .chip[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
}

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

/* ---------- 问题流 ---------- */

.page-faq .faq-stream {
  margin-top: clamp(18px, 2.6vw, 30px);
  row-gap: clamp(22px, 3.4vw, 44px);
}

.page-faq .qa {
  display: block;
  margin-bottom: 10px;
  border: 1px solid var(--faq-line);
  border-left: 2px solid rgba(169, 199, 189, .3);
  background: rgba(11, 43, 34, .55);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .qa:hover {
  border-left-color: var(--mint);
}

.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: rgba(28, 68, 55, .5);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--bone);
  letter-spacing: -.01em;
}

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

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

.page-faq .qa__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--orange);
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
}

.page-faq .qa__a {
  max-width: 62ch;
  padding: 0 16px 16px 42px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 239, 230, .82);
}

.page-faq .qa__a p {
  margin: 0 0 8px;
}

.page-faq .qa__a p:last-child {
  margin-bottom: 0;
}

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

/* ---------- 横向口径带 ---------- */

.page-faq .faq-band {
  position: relative;
  margin: clamp(4px, 1vw, 12px) 0;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  background: linear-gradient(90deg, rgba(28, 68, 55, .9), rgba(11, 43, 34, .92));
  overflow: hidden;
}

.page-faq .faq-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, var(--mint) 0 1px, transparent 1px 18px);
  opacity: .3;
  pointer-events: none;
}

.page-faq .faq-band__track {
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 26px clamp(16px, 3vw, 30px);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-band__item {
  flex: none;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(242, 239, 230, .88);
  white-space: nowrap;
}

.page-faq .faq-band__item .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
}

/* ---------- 图片与面板微调 ---------- */

.page-faq .faq-scope__figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
  border: 1px solid var(--faq-line);
  background: rgba(11, 43, 34, .5);
  padding: 10px;
}

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

.page-faq .panel {
  margin-bottom: 0;
}

.page-faq .panel__body {
  padding-top: 4px;
}

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

/* ---------- 术语表 ---------- */

.page-faq .glossary {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--faq-line);
  background: var(--faq-line);
}

.page-faq .glossary__row {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  background: rgba(11, 43, 34, .88);
}

.page-faq .glossary__row p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 239, 230, .78);
}

.page-faq .gloss {
  position: relative;
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
  cursor: help;
  border-bottom: 1px dashed rgba(53, 224, 200, .45);
  outline: none;
}

.page-faq .gloss:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .gloss__pop {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  z-index: 6;
  width: min(260px, 60vw);
  padding: 10px 12px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.65;
  letter-spacing: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity .16s var(--ease), transform .16s var(--ease), visibility .16s var(--ease);
  pointer-events: none;
}

.page-faq .gloss:hover .gloss__pop,
.page-faq .gloss:focus .gloss__pop,
.page-faq .gloss:focus-visible .gloss__pop {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 联系面板 ---------- */

.page-faq .faq-help {
  border: 1px solid rgba(53, 224, 200, .38);
  background: linear-gradient(135deg, rgba(28, 68, 55, .92), rgba(11, 43, 34, .95));
  padding: clamp(20px, 3.2vw, 36px);
}

.page-faq .faq-help__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--clay);
}

.page-faq .faq-help__title {
  margin: 10px 0 0;
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.25;
  color: var(--bone);
}

.page-faq .faq-help__body > p {
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 239, 230, .84);
}

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

.page-faq .faq-help__list {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--faq-line);
  list-style: none;
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 239, 230, .82);
}

.page-faq .faq-help__list .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  padding-top: 3px;
}

.page-faq .faq-help__note {
  margin-top: 18px;
  font-size: 13px;
  color: var(--mono-gray);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 22px 0 0;
}

.page-faq .faq-top {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 199, 189, .4);
  padding-bottom: 2px;
}

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

.page-faq .faq-top:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .glossary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-help__list li {
    grid-template-columns: 40px minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .55fr);
    align-items: end;
  }

  .page-faq .qa__a {
    padding-left: 46px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }

  .page-faq .faq-index__name {
    font-size: 15px;
  }

  .page-faq .qa__q {
    font-size: 15px;
    padding: 13px 14px;
  }

  .page-faq .qa__a {
    padding: 0 14px 15px 14px;
  }

  .page-faq .faq-top {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__item,
  .page-faq .faq-index__item::after,
  .page-faq .qa,
  .page-faq .gloss__pop {
    transition: none;
  }

  .page-faq .faq-index__item:hover {
    transform: none;
  }

  .page-faq .gloss__pop {
    transform: none;
  }
}