.page-faq {
  position: relative;
  background:
    radial-gradient(900px 520px at 88% -10%, rgba(124, 77, 255, .16), transparent 62%),
    radial-gradient(720px 420px at 4% 2%, rgba(0, 229, 255, .10), transparent 60%),
    var(--ink-800);
  color: var(--text);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

.page-faq .faq-crumb {
  padding-top: clamp(14px, 2.6vw, 24px);
}

.page-faq .faq-crumb .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .faq-crumb .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-crumb .breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(30px, 5vw, 52px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: -30px 0 auto 0;
  height: 520px;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(70% 80% at 40% 20%, #000 20%, transparent 88%);
  mask-image: radial-gradient(70% 80% at 40% 20%, #000 20%, transparent 88%);
  opacity: .45;
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.4vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -.03em;
}

.page-faq .faq-hero .eyebrow {
  color: var(--cyan);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: #C6DCEA;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 18px;
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 23px);
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-faq .faq-stat__txt {
  display: block;
  margin-top: 5px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 图形容器 ---------- */
.page-faq .faq-figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, rgba(22, 47, 71, .92), rgba(6, 18, 31, .94));
  box-shadow: 0 28px 64px -34px rgba(0, 0, 0, .95), inset 0 0 0 1px rgba(0, 229, 255, .06);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  padding: 0 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter-wrap {
  padding-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: rgba(17, 40, 60, .58);
  backdrop-filter: blur(6px);
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--muted);
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-chip:hover {
  color: var(--text);
  border-color: var(--cyan);
}

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

.page-faq .faq-filter__radio:checked + .faq-chip {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
}

.page-faq .faq-filter__hint {
  margin-left: auto;
  padding-left: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
}

.page-faq:has(#f-entry:checked) .faq-block:not([data-cat="entry"]),
.page-faq:has(#f-download:checked) .faq-block:not([data-cat="download"]),
.page-faq:has(#f-device:checked) .faq-block:not([data-cat="device"]),
.page-faq:has(#f-activity:checked) .faq-block:not([data-cat="activity"]) {
  display: none;
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-faq .faq-side {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: rgba(17, 40, 60, .5);
  padding: 14px;
}

.page-faq .faq-side__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-side__item {
  flex: 0 0 auto;
  width: 218px;
}

.page-faq .faq-side__link {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 3px 8px;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-left: 2px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-side__link:hover {
  background: rgba(0, 229, 255, .07);
  border-left-color: var(--cyan);
}

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

.page-faq .faq-side__no {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-side__name {
  grid-column: 2;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.45;
}

.page-faq .faq-side__hint {
  grid-column: 2;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-side__tag {
  grid-column: 2;
  justify-self: start;
  margin: 4px 0 2px;
  font-size: 10.5px;
}

.page-faq .faq-side__item--current .faq-side__link {
  background: linear-gradient(100deg, rgba(0, 229, 255, .14), rgba(124, 77, 255, .10));
  border-color: rgba(0, 229, 255, .3);
  border-left-color: var(--cyan);
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, .08);
}

.page-faq .faq-side__item--current .faq-side__no {
  color: var(--orange);
}

.page-faq .faq-side__note {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-faq .faq-side__note a {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .45);
}

.page-faq .faq-side__note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: clamp(30px, 4vw, 46px);
  min-width: 0;
}

.page-faq .faq-block {
  padding-top: clamp(22px, 3vw, 30px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 22px);
}

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

.page-faq .faq-block__head {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .faq-block__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.32rem, 3.4vw, 1.85rem);
  line-height: 1.28;
  letter-spacing: -.02em;
}

.page-faq .faq-block__head p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: #B9D1E0;
}

.page-faq .faq-block .label-mono {
  color: var(--cyan);
}

.page-faq .faq-block[data-cat="download"] .label-mono {
  color: var(--violet-soft);
}

.page-faq .faq-block[data-cat="device"] .label-mono {
  color: var(--green);
}

.page-faq .faq-block[data-cat="activity"] .label-mono {
  color: var(--orange);
}

.page-faq .faq-block[data-cat="activity"] {
  padding-left: clamp(0px, 2vw, 18px);
  border-left: 1px solid rgba(255, 138, 61, .28);
}

.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: rgba(17, 40, 60, .62);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item:hover {
  border-color: rgba(0, 229, 255, .32);
}

.page-faq .faq-item[open] {
  border-color: rgba(0, 229, 255, .38);
  background: rgba(22, 47, 71, .82);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-item__a {
  display: grid;
  gap: 12px;
  padding: 0 16px 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: #C6DCEA;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .45);
}

.page-faq .faq-steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
}

.page-faq .faq-steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--cyan);
  padding-top: 3px;
}

.page-faq .faq-item__why {
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 排查流程 ---------- */
.page-faq .faq-flow {
  margin-top: clamp(46px, 7vw, 78px);
  padding-top: clamp(30px, 4vw, 46px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-flow__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-faq .faq-flow .label-mono {
  color: var(--violet-soft);
}

.page-faq .faq-flow h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.3rem, 3.4vw, 1.8rem);
  line-height: 1.3;
  letter-spacing: -.02em;
}

.page-faq .faq-flow__steps ol {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-flow__step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: rgba(17, 40, 60, .52);
}

.page-faq .faq-flow__step > span {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-flow__step strong {
  display: block;
  font-size: 14.5px;
  font-weight: 700;
}

.page-faq .faq-flow__step p {
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 联系区 ---------- */
.page-faq .faq-support {
  margin-top: clamp(46px, 7vw, 80px);
  padding: clamp(30px, 5vw, 56px) 0 clamp(6px, 2vw, 16px);
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(124, 77, 255, .12), transparent 72%);
}

.page-faq .faq-support__grid {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

.page-faq .faq-support .label-mono {
  color: var(--orange);
}

.page-faq .faq-support h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  line-height: 1.26;
  letter-spacing: -.02em;
}

.page-faq .faq-support__text > p {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: #C6DCEA;
}

.page-faq .faq-mail {
  margin: 18px 0 0;
  padding: 16px 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: rgba(6, 18, 31, .88);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.95;
  color: #CFE6F2;
  white-space: pre-wrap;
  word-break: break-word;
}

.page-faq .faq-mail code {
  font: inherit;
  color: inherit;
}

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

.page-faq .faq-contact {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(168deg, rgba(22, 47, 71, .96), rgba(11, 27, 43, .96));
  box-shadow: 0 24px 60px -36px rgba(0, 0, 0, .95);
}

.page-faq .faq-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-contact__list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-contact__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-contact__row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
  padding-top: 2px;
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  word-break: break-word;
}

.page-faq .faq-contact__row dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .45);
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-contact__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
}

.page-faq .faq-contact__link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-contact__link:hover {
  color: var(--text);
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-filter {
    border-radius: 999px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }

  .page-faq .faq-hero__text {
    padding-top: 8px;
  }

  .page-faq .faq-figure {
    margin-top: 6px;
  }

  .page-faq .faq-body {
    grid-template-columns: 272px minmax(0, 1fr);
    align-items: start;
    gap: clamp(28px, 3vw, 44px);
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 18px);
    padding: 18px;
  }

  .page-faq .faq-side__list {
    display: grid;
    gap: 8px;
    overflow: visible;
  }

  .page-faq .faq-side__item {
    width: auto;
  }

  .page-faq .faq-flow__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    align-items: center;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-hero__stats {
    gap: 22px;
  }

  .page-faq .faq-item__q {
    font-size: 15.5px;
    padding: 16px 20px;
  }

  .page-faq .faq-item__a {
    padding: 0 20px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .faq-item,
  .page-faq .faq-side__link,
  .page-faq .faq-contact__link {
    transition: none;
  }
}
<<<END>>>