.page-faq {
  --faq-rail: 236px;
  --faq-shadow: 0 24px 60px -34px rgba(0, 0, 0, .92);
  position: relative;
  background:
    radial-gradient(1100px 560px at 84% -12%, rgba(183, 245, 66, .08), transparent 62%),
    radial-gradient(760px 420px at -8% 26%, rgba(55, 214, 196, .055), transparent 66%),
    var(--bb-void);
  color: var(--bb-paper);
  padding: clamp(1.4rem, 4vw, 3rem) 0 clamp(3rem, 8vw, 6rem);
}

.page-faq * {
  box-sizing: border-box;
}

.page-faq .bb-breadcrumb {
  margin: 0 0 clamp(1.4rem, 3vw, 2.2rem);
}

/* ---------- 首屏 ---------- */
.faq-hero {
  position: relative;
  padding-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1rem;
  font-family: var(--bb-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--bb-lime);
}

.faq-hero__kicker::before {
  content: "";
  width: 30px;
  height: 2px;
  border-radius: 2px;
  background: var(--bb-melt);
}

.faq-hero__title {
  margin: 0 0 1.1rem;
  max-width: 21ch;
  font-family: var(--bb-serif);
  font-weight: 900;
  font-size: clamp(1.95rem, 5.6vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--bb-paper);
}

.faq-hero__lead {
  margin: 0 0 1.6rem;
  max-width: 64ch;
  font-size: clamp(.95rem, 1.5vw, 1rem);
  line-height: 1.78;
  color: var(--bb-steel);
}

.faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.2rem);
}

.faq-facts {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-line);
  overflow: hidden;
}

.faq-facts__item {
  display: grid;
  gap: .3rem;
  align-content: start;
  padding: 1rem 1.05rem;
  background: linear-gradient(180deg, var(--bb-carbon), var(--bb-carbon-2));
}

.faq-facts__num {
  font-family: var(--bb-mono);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  letter-spacing: -.02em;
  color: var(--bb-lime);
}

.faq-facts__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--bb-steel);
}

@media (min-width: 700px) {
  .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 主体骨架：目录 + 内容流 ---------- */
.faq-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.4rem);
  margin-top: clamp(2rem, 5vw, 3.2rem);
  align-items: start;
}

.faq-flow {
  min-width: 0;
}

@media (min-width: 1000px) {
  .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }
}

/* ---------- 左侧问题目录 ---------- */
.faq-toc {
  padding: .9rem .85rem 1rem;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-glass);
  box-shadow: var(--faq-shadow);
}

.faq-toc__title {
  margin: 0 0 .55rem;
  font-family: var(--bb-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--bb-steel);
}

.faq-toc__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: .52rem .55rem;
  border-left: 2px solid transparent;
  border-radius: var(--bb-radius-sm);
  color: var(--bb-steel);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.45;
  transition: color var(--bb-dur) ease, background var(--bb-dur) ease, border-color var(--bb-dur) ease;
}

.faq-toc__link:hover,
.faq-toc__link:focus-visible {
  color: var(--bb-paper);
  background: var(--bb-glass-2);
  border-left-color: var(--bb-lime);
}

.faq-toc__link:focus-visible {
  outline: 2px solid var(--bb-lime);
  outline-offset: 2px;
}

.faq-toc__num {
  font-family: var(--bb-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--bb-lime);
}

@media (min-width: 560px) and (max-width: 999px) {
  .faq-toc__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .faq-toc {
    position: sticky;
    top: 104px;
  }
}

/* ---------- 章节通用 ---------- */
.page-faq .bb-section {
  padding: clamp(1.8rem, 4.5vw, 2.8rem) 0;
  border-top: 1px solid var(--bb-line-soft);
}

.page-faq .bb-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .bb-section__head {
  display: grid;
  gap: .55rem;
  margin-bottom: clamp(1.2rem, 3vw, 1.9rem);
}

.page-faq .bb-section__num {
  font-family: var(--bb-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--bb-lime);
}

.page-faq .bb-section__title {
  margin: 0;
  font-family: var(--bb-serif);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--bb-paper);
}

.page-faq .bb-section__lead {
  margin: 0;
  max-width: 64ch;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--bb-steel);
}

/* ---------- 三步上手 ---------- */
.faq-steps-wrap {
  display: grid;
  gap: clamp(1rem, 3vw, 1.6rem);
}

@media (min-width: 1000px) {
  .faq-steps-wrap {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }
}

.faq-steps {
  display: grid;
  gap: .8rem;
}

.faq-step {
  position: relative;
  padding: 1.15rem 1.2rem 1.2rem 3.6rem;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: linear-gradient(180deg, var(--bb-carbon), var(--bb-carbon-2));
  transition: border-color var(--bb-dur) ease, transform var(--bb-dur) ease;
}

.faq-step:hover {
  border-color: rgba(183, 245, 66, .38);
  transform: translateY(-2px);
}

.faq-step__num {
  position: absolute;
  left: 1.2rem;
  top: 1.12rem;
  font-family: var(--bb-mono);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -.02em;
  color: var(--bb-lime);
}

.faq-step__title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--bb-paper);
}

.faq-step__body {
  margin: .45rem 0 0;
  font-size: .9rem;
  line-height: 1.72;
  color: var(--bb-steel);
}

.faq-step__done {
  margin: .75rem 0 0;
  padding-left: .65rem;
  border-left: 2px solid var(--bb-lime);
  font-size: .84rem;
  line-height: 1.65;
  color: var(--bb-paper);
}

/* ---------- 图片 ---------- */
.faq-shot {
  margin: clamp(1rem, 3vw, 1.6rem) 0 0;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-carbon);
  overflow: hidden;
}

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

.faq-shot__cap {
  padding: .7rem .9rem;
  border-top: 1px solid var(--bb-line);
  font-size: 12px;
  line-height: 1.6;
  color: var(--bb-steel);
}

@media (min-width: 1000px) {
  .faq-steps__media {
    margin-top: 0;
  }
}

.faq-shot--wide {
  max-width: 880px;
}

/* ---------- 刷新节奏 ---------- */
.faq-refresh {
  display: grid;
  gap: .8rem;
}

@media (min-width: 760px) {
  .faq-refresh {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.faq-refresh__card {
  display: grid;
  gap: .35rem;
  align-content: start;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-carbon);
}

.faq-refresh__val {
  font-family: var(--bb-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.6vw, 1.6rem);
  letter-spacing: -.02em;
  color: var(--bb-lime);
}

.faq-refresh__label {
  margin: 0;
  font-size: .96rem;
  font-weight: 800;
  color: var(--bb-paper);
}

.faq-refresh__desc {
  margin: 0;
  font-size: .87rem;
  line-height: 1.68;
  color: var(--bb-steel);
}

.faq-delay {
  display: grid;
  gap: .75rem;
  margin-top: 1rem;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-glass);
}

.faq-delay__title {
  margin: 0;
  font-size: .98rem;
  font-weight: 800;
  color: var(--bb-paper);
}

.faq-delay__list {
  display: grid;
  gap: .55rem;
  margin: 0;
  padding-left: 1.15rem;
  font-size: .89rem;
  line-height: 1.72;
  color: var(--bb-steel);
}

.faq-delay__list li::marker {
  color: var(--bb-lime);
}

/* ---------- 折叠问答 ---------- */
.faq-qa {
  display: grid;
  gap: .6rem;
}

.faq-item {
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-carbon);
  overflow: hidden;
  transition: border-color var(--bb-dur) ease;
}

.faq-item[open] {
  border-color: rgba(183, 245, 66, .42);
}

.faq-item__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  list-style: none;
  font-size: .97rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--bb-paper);
  transition: background var(--bb-dur) ease;
}

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

.faq-item__q:hover {
  background: var(--bb-glass);
}

.faq-item__q:focus-visible {
  outline: 2px solid var(--bb-lime);
  outline-offset: -2px;
}

.faq-item__icon {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.faq-item__icon::before,
.faq-item__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  border-radius: 2px;
  background: var(--bb-lime);
  transform: translateY(-50%);
  transition: transform var(--bb-dur) ease;
}

.faq-item__icon::after {
  transform: translateY(-50%) rotate(90deg);
}

.faq-item[open] .faq-item__icon::after {
  transform: translateY(-50%) rotate(0deg);
}

.faq-item__a {
  padding: 0 1.15rem 1.1rem;
  font-size: .91rem;
  line-height: 1.78;
  color: var(--bb-steel);
}

.faq-item__a p {
  margin: 0 0 .7rem;
}

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

.faq-item__a strong {
  color: var(--bb-lime);
  font-weight: 700;
}

/* ---------- 终端与账号 ---------- */
.faq-devices {
  display: grid;
  gap: .85rem;
}

@media (min-width: 820px) {
  .faq-devices {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.faq-device {
  display: grid;
  gap: .8rem;
  align-content: start;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-carbon);
}

.faq-device--accent {
  border-color: rgba(183, 245, 66, .4);
  background:
    linear-gradient(180deg, rgba(183, 245, 66, .09), transparent 58%),
    var(--bb-carbon);
}

.faq-device__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
}

.faq-device__name {
  margin: 0;
  font-size: .99rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--bb-paper);
}

.faq-device__specs {
  display: grid;
  gap: .55rem;
  margin: 0;
}

.faq-device__specs div {
  display: grid;
  grid-template-columns: 5.2rem minmax(0, 1fr);
  gap: .6rem;
  align-items: baseline;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--bb-line);
}

.faq-device__specs div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.faq-device__specs dt {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--bb-steel);
}

.faq-device__specs dd {
  margin: 0;
  font-size: .87rem;
  line-height: 1.62;
  color: var(--bb-paper);
}

.faq-device__specs dd.bb-mono {
  font-family: var(--bb-mono);
  font-weight: 700;
  color: var(--bb-cyan);
}

/* ---------- 故障自查 ---------- */
.faq-fix {
  display: grid;
  gap: .8rem;
}

@media (min-width: 760px) {
  .faq-fix {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.faq-fix__card {
  display: grid;
  gap: .65rem;
  align-content: start;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-glass);
}

.faq-fix__title {
  margin: 0;
  font-size: .98rem;
  font-weight: 800;
  color: var(--bb-paper);
}

.faq-fix__list {
  display: grid;
  gap: .5rem;
  margin: 0;
  padding-left: 1.15rem;
  font-size: .87rem;
  line-height: 1.7;
  color: var(--bb-steel);
}

.faq-fix__list li::marker {
  font-family: var(--bb-mono);
  color: var(--bb-score);
}

.faq-support {
  display: grid;
  gap: .9rem;
  margin-top: 1rem;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-carbon-2);
}

.faq-support__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--bb-steel);
}

.faq-support .bb-btn {
  justify-self: start;
}

@media (min-width: 760px) {
  .faq-support {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

/* ---------- 相关页面 ---------- */
.faq-next {
  display: grid;
  gap: .7rem;
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
  padding-top: clamp(1.4rem, 3vw, 2rem);
  border-top: 1px solid var(--bb-line-soft);
}

@media (min-width: 760px) {
  .faq-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.faq-next__link {
  display: grid;
  gap: .3rem;
  align-content: start;
  padding: 1rem 1.1rem;
  border: 1px solid var(--bb-line);
  border-radius: var(--bb-radius);
  background: var(--bb-carbon);
  color: var(--bb-paper);
  text-decoration: none;
  transition: border-color var(--bb-dur) ease, transform var(--bb-dur) ease;
}

.faq-next__link:hover,
.faq-next__link:focus-visible {
  border-color: var(--bb-lime);
  transform: translateY(-2px);
}

.faq-next__link:focus-visible {
  outline: 2px solid var(--bb-lime);
  outline-offset: 2px;
}

.faq-next__label {
  font-family: var(--bb-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--bb-lime);
}

.faq-next__title {
  font-size: .95rem;
  font-weight: 700;
}

.faq-next__desc {
  font-size: .84rem;
  line-height: 1.62;
  color: var(--bb-steel);
}

/* ---------- 滚动显现 ---------- */
.page-faq [data-reveal] {
  opacity: 1;
  transform: none;
  transition: opacity var(--bb-dur) ease, transform var(--bb-dur) ease;
  transition-delay: var(--bb-delay, 0ms);
}

.page-faq [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal],
  .faq-step,
  .faq-item,
  .faq-item__q,
  .faq-toc__link,
  .faq-next__link,
  .faq-item__icon::before,
  .faq-item__icon::after {
    transition: none !important;
  }

  .faq-step:hover,
  .faq-next__link:hover,
  .faq-next__link:focus-visible {
    transform: none;
  }
}

@media (min-width: 1280px) {
  .faq-hero__title {
    font-size: 3.5rem;
  }
}
<<<END>>>

.page-faq {
  --bb-delay: 0.3s;
}