.page-faq {
  --faq-index-w: 236px;
  --faq-ink-soft: var(--bm-silver);
  display: block;
  background: var(--bm-base);
  color: var(--bm-paper);
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 16px 64px;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  margin-bottom: 16px;
}

.page-faq .bm-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-faq .bm-crumbs__item {
  display: inline-flex;
  align-items: center;
  color: var(--bm-silver);
}

.page-faq .bm-crumbs__item + .bm-crumbs__item::before {
  content: "/";
  margin: 0 8px;
  color: var(--bm-line-strong);
}

.page-faq .bm-crumbs__link {
  color: var(--bm-silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-faq a.bm-crumbs__link:hover,
.page-faq a.bm-crumbs__link:focus-visible {
  color: var(--bm-lime);
  border-bottom-color: var(--bm-lime);
}

.page-faq span.bm-crumbs__link[aria-current="page"] {
  color: var(--bm-paper);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 6px 0 26px;
  border-bottom: 1px solid var(--bm-line);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--bm-lime);
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  max-width: 22ch;
  font-family: var(--bm-font-title);
  font-weight: 900;
  font-size: clamp(27px, 6.2vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.005em;
  color: var(--bm-paper);
}

.page-faq .faq-hero__lead {
  margin: 0 0 22px;
  max-width: 38ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bm-silver);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--bm-line);
  background: var(--bm-line);
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 16px;
  background: var(--bm-panel);
  font-size: 13px;
  line-height: 1.6;
  color: var(--bm-silver);
}

.page-faq .faq-hero__num {
  font-size: 26px;
  line-height: 1;
  font-weight: 700;
  color: var(--bm-lime);
}

/* ---------- 操作演示条 ---------- */
.page-faq .faq-demo {
  padding: 26px 0 6px;
  border-bottom: 1px solid var(--bm-line);
}

.page-faq .faq-demo__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.page-faq .faq-demo__title {
  margin: 0;
  font-family: var(--bm-font-title);
  font-weight: 800;
  font-size: clamp(18px, 4.2vw, 26px);
  line-height: 1.25;
  color: var(--bm-paper);
}

.page-faq .faq-demo__hint {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--bm-orange);
  white-space: nowrap;
}

.page-faq .faq-demo__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 76%;
  gap: 10px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  padding-bottom: 14px;
  scrollbar-width: thin;
}

.page-faq .faq-demo__track:focus-visible {
  outline: 2px solid var(--bm-blue);
  outline-offset: 3px;
}

.page-faq .faq-demo__track > * {
  scroll-snap-align: start;
}

.page-faq .faq-demo__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  background: var(--bm-panel);
  border: 1px solid var(--bm-line);
}

.page-faq .faq-demo__figure {
  margin: 0;
  width: 100%;
  aspect-ratio: 9 / 10;
  overflow: hidden;
  border: 1px solid var(--bm-line);
  background: var(--bm-raised);
}

.page-faq .faq-demo__figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06) brightness(0.94);
}

.page-faq .faq-demo__figure--odds {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  padding: 18px;
  background:
    linear-gradient(145deg, rgba(200, 255, 77, 0.12), rgba(63, 125, 255, 0.08) 52%, rgba(255, 106, 43, 0.12)),
    var(--bm-raised);
}

.page-faq .faq-odds-chip {
  display: block;
  padding: 10px 12px;
  border: 1px solid var(--bm-line-strong);
  background: rgba(10, 16, 36, 0.72);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--bm-silver);
}

.page-faq .faq-odds-chip--now {
  color: var(--bm-lime);
  border-color: rgba(200, 255, 77, 0.55);
  background: rgba(10, 16, 36, 0.9);
}

.page-faq .faq-demo__step {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--bm-orange);
}

.page-faq .faq-demo__name {
  margin: 0;
  font-family: var(--bm-font-title);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--bm-paper);
}

.page-faq .faq-demo__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--bm-silver);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding-top: 28px;
}

.page-faq .faq-index {
  padding: 14px;
  border: 1px solid var(--bm-line);
  background: var(--bm-panel);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--bm-silver);
}

.page-faq .faq-index__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  color: var(--bm-silver);
  font-size: 13.5px;
  line-height: 1.55;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--bm-paper);
  background: var(--bm-raised);
  outline: none;
}

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

.page-faq .faq-index__link.is-active {
  color: var(--bm-lime);
  border-left-color: var(--bm-lime);
  background: var(--bm-raised);
}

.page-faq .faq-index__num {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--bm-line-strong);
}

.page-faq .faq-index__link.is-active .faq-index__num {
  color: var(--bm-lime);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-answers {
  display: grid;
  gap: 30px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--bm-topbar-h) + 26px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--bm-line);
}

.page-faq .faq-group__num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--bm-orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--bm-font-title);
  font-size: clamp(20px, 4.4vw, 28px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--bm-paper);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--bm-silver);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-group__items {
  display: grid;
  gap: 1px;
  border: 1px solid var(--bm-line);
  background: var(--bm-line);
}

.page-faq .faq-item {
  background: var(--bm-panel);
  transition: background-color 0.18s ease;
}

.page-faq .faq-item[open] {
  background: var(--bm-raised);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px;
  padding: 16px;
  cursor: pointer;
  list-style: none;
  color: var(--bm-paper);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  transition: background-color 0.18s ease;
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover {
  background: rgba(30, 42, 82, 0.55);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--bm-silver);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-item__mark::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background: var(--bm-lime);
  transform: rotate(0deg);
}

.page-faq .faq-item__a {
  padding: 14px 16px 20px;
  border-top: 1px solid var(--bm-line);
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.9;
  color: var(--bm-silver);
}

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

.page-faq .faq-item__a a {
  color: var(--bm-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.18s ease;
}

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

.page-faq .faq-key {
  font-weight: 700;
  color: var(--bm-lime);
  border-bottom: 2px solid rgba(200, 255, 77, 0.44);
  padding-bottom: 1px;
}

/* ---------- 尾部联系块 ---------- */
.page-faq .faq-tail {
  display: grid;
  gap: 16px;
  margin-top: 38px;
  padding: 22px 18px;
  border: 1px solid var(--bm-line);
  background:
    linear-gradient(135deg, rgba(200, 255, 77, 0.09), rgba(63, 125, 255, 0.08) 50%, rgba(255, 106, 43, 0.11)),
    var(--bm-panel);
}

.page-faq .faq-tail__kicker {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--bm-orange);
}

.page-faq .faq-tail__title {
  margin: 0 0 10px;
  font-family: var(--bm-font-title);
  font-size: clamp(19px, 4.4vw, 26px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--bm-paper);
}

.page-faq .faq-tail__text {
  margin: 0;
  max-width: 44ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--bm-silver);
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-wrap {
    padding: 20px 24px 78px;
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-demo__track {
    grid-auto-columns: 54%;
  }

  .page-faq .faq-demo__item {
    padding: 14px;
  }
}

/* ---------- 桌面：双栏 + 固定索引 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-wrap {
    padding: 28px 32px 96px;
  }

  .page-faq .faq-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    column-gap: 40px;
    align-items: end;
    padding-bottom: 30px;
  }

  .page-faq .faq-hero__kicker,
  .page-faq .faq-hero__title {
    grid-column: 1;
  }

  .page-faq .faq-hero__lead {
    grid-column: 1;
  }

  .page-faq .faq-hero__facts {
    grid-column: 2;
    grid-row: 1 / span 4;
    align-self: end;
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-demo__track {
    grid-auto-flow: row;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-demo__hint {
    display: none;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 42px;
    padding-top: 34px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bm-topbar-h) + 18px);
    max-height: calc(100vh - var(--bm-topbar-h) - 40px);
    overflow-y: auto;
    padding: 16px;
  }

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

  .page-faq .faq-tail {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 26px 28px;
  }

  .page-faq .faq-tail__actions {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1240px) {
  .page-faq {
    --faq-index-w: 260px;
  }

  .page-faq .faq-wrap {
    padding: 32px 40px 112px;
  }

  .page-faq .faq-hero {
    column-gap: 56px;
  }

  .page-faq .faq-body {
    gap: 56px;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 420px) {
  .page-faq .faq-index__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-demo__track {
    grid-auto-columns: 84%;
  }

  .page-faq .faq-item > summary {
    font-size: 14.5px;
  }

  .page-faq .faq-tail__actions .bm-btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item > summary {
    transition: none;
  }
}
<<<END>>>