.page-faq {
  --faq-edge: rgba(255, 248, 238, 0.14);
  --faq-edge-strong: rgba(255, 248, 238, 0.3);
  --faq-answer: rgba(255, 248, 238, 0.78);
}

.page-faq .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 2px solid var(--line-strong);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(620px 280px at 10% -10%, rgba(255, 90, 31, 0.2), transparent 68%),
    radial-gradient(560px 300px at 92% 108%, rgba(22, 224, 210, 0.14), transparent 70%),
    repeating-linear-gradient(90deg, rgba(255, 248, 238, 0.035) 0 1px, transparent 1px 72px);
}

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

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ash);
}

.page-faq .faq-hero__dot {
  width: 7px;
  height: 7px;
  background: var(--brand);
  box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.22);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 8vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.015em;
  color: var(--warm);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--faq-answer);
}

.page-faq .faq-search {
  margin-top: clamp(24px, 3.5vw, 36px);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 18px;
  border: 2px solid var(--faq-edge-strong);
  background: var(--ink-800);
  transition: border-color var(--t), box-shadow var(--t), background var(--t);
}

.page-faq .faq-search:focus-within {
  border-color: var(--brand);
  background: #101418;
  box-shadow: 6px 6px 0 rgba(255, 90, 31, 0.22);
}

.page-faq .faq-search__icon {
  flex: none;
  display: inline-flex;
  color: var(--brand);
}

.page-faq .faq-search__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 17px 0;
  border: 0;
  background: transparent;
  color: var(--warm);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  outline: none;
  appearance: none;
}

.page-faq .faq-search__input::placeholder {
  color: var(--ash);
  letter-spacing: 0.06em;
}

.page-faq .faq-heat {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-top: 18px;
}

.page-faq .faq-heat__key {
  flex: none;
  padding: 4px 9px;
  border: 1px solid var(--brand);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--brand);
}

.page-faq .faq-heat__link {
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  font-size: 13px;
  color: var(--ash);
  text-decoration: none;
  transition: color var(--t), border-color var(--t);
}

.page-faq .faq-heat__link:hover,
.page-faq .faq-heat__link:focus-visible {
  color: var(--warm);
  border-bottom-color: var(--data);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(32px, 5vw, 64px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  border: 2px solid var(--faq-edge-strong);
  background: var(--ink-800);
  padding: 6px;
}

.page-faq .faq-index__title {
  margin: 8px 12px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brand);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  border-left: 3px solid transparent;
  font-size: 14px;
  color: var(--ash);
  text-decoration: none;
  transition: color var(--t), background var(--t), border-color var(--t), padding-left var(--t);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  padding-left: 20px;
  border-left-color: var(--brand);
  background: rgba(255, 90, 31, 0.09);
  color: var(--warm);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--brand);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-cat {
  margin-bottom: clamp(36px, 5vw, 68px);
  scroll-margin-top: 24px;
}

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

.page-faq .faq-cat__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--faq-edge-strong);
}

.page-faq .faq-cat__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--brand);
}

.page-faq .faq-cat__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  line-height: 1.15;
  color: var(--warm);
}

.page-faq .faq-cat__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ash);
}

/* ---------- 快速入口卡片 ---------- */
.page-faq .faq-quick {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-quick__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 2px solid var(--faq-edge);
  background: var(--ink-800);
  color: inherit;
  text-decoration: none;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t), background var(--t);
}

.page-faq .faq-quick__card:hover,
.page-faq .faq-quick__card:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--brand);
  background: #12171b;
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-quick__tag {
  align-self: flex-start;
  padding: 3px 8px;
  border: 1px solid var(--data);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--data);
}

.page-faq .faq-quick__name {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--warm);
}

.page-faq .faq-quick__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ash);
}

.page-faq .faq-quick__go {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--brand);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 2px solid var(--faq-edge-strong);
  background: var(--ink-800);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-bottom: 1px solid var(--faq-edge);
}

.page-faq .faq-figure__cap {
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ash);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  margin-bottom: 12px;
  border: 2px solid var(--faq-edge);
  background: var(--ink-800);
  scroll-margin-top: 24px;
  transition: border-color var(--t), background var(--t);
}

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

.page-faq .faq-item[open] {
  border-color: var(--brand);
  background: #12171b;
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  color: var(--warm);
  font-size: clamp(15px, 1.6vw, 16px);
  font-weight: 600;
  line-height: 1.55;
  transition: color var(--t);
}

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

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

.page-faq .faq-item > summary:hover {
  color: var(--brand-soft);
}

.page-faq .faq-item__num {
  flex: none;
  width: 26px;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--data);
  opacity: 0;
  transition: opacity var(--t);
}

.page-faq .faq-item:hover .faq-item__num,
.page-faq .faq-item[open] .faq-item__num,
.page-faq .faq-item > summary:focus-visible .faq-item__num {
  opacity: 1;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

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

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--brand);
  transition: transform var(--t), opacity var(--t);
}

.page-faq .faq-item__icon::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-item__icon::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__answer {
  padding: 0 18px 20px;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--faq-answer);
}

/* ---------- 设备条 ---------- */
.page-faq .faq-devices {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-faq .faq-devices__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border: 2px solid var(--faq-edge);
  background: var(--ink-800);
  transition: border-color var(--t), transform var(--t);
}

.page-faq .faq-devices__item:hover {
  border-color: var(--data);
  transform: translateY(-2px);
}

.page-faq .faq-devices__icon {
  display: inline-flex;
  color: var(--data);
}

.page-faq .faq-devices__name {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--warm);
}

.page-faq .faq-devices__spec {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ash);
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-help__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 2px solid var(--faq-edge);
  background: var(--ink-800);
}

.page-faq .faq-help__card--accent {
  border-color: var(--brand);
  background: linear-gradient(160deg, rgba(255, 90, 31, 0.16), rgba(255, 90, 31, 0.03) 70%), var(--ink-800);
}

.page-faq .faq-help__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brand);
}

.page-faq .faq-help__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2vw, 19px);
  font-weight: 700;
  letter-spacing: 0.01em;
  word-break: break-word;
  color: var(--warm);
}

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

.page-faq .faq-help__link {
  align-self: flex-start;
  margin-top: 2px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--data);
  font-size: 13px;
  color: var(--data);
  text-decoration: none;
  transition: color var(--t), border-color var(--t);
}

.page-faq .faq-help__link:hover,
.page-faq .faq-help__link:focus-visible {
  color: var(--warm);
  border-color: var(--warm);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-faq .faq-help {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-help__card--accent {
    grid-column: 1 / -1;
  }

  .page-faq .faq-item__answer {
    padding-left: 56px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
  }

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

  .page-faq .faq-help__card--accent {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__card,
  .page-faq .faq-devices__item,
  .page-faq .faq-search,
  .page-faq .faq-item,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-item__num,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .faq-quick__card:hover,
  .page-faq .faq-quick__card:focus-visible,
  .page-faq .faq-devices__item:hover {
    transform: none;
  }
}
<<<END>>>