.page-faq {
  --faq-pad: clamp(14px, 2.4vw, 20px);
  padding-bottom: clamp(44px, 6vw, 88px);
  background:
    radial-gradient(760px 380px at 88% -8%, rgba(86, 224, 210, 0.07), transparent 70%),
    radial-gradient(620px 320px at 4% 30%, rgba(200, 255, 61, 0.04), transparent 72%),
    var(--ink);
}

.page-faq .breadcrumb {
  margin: clamp(14px, 2.4vw, 22px) 0 clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: clamp(18px, 3vw, 34px);
  align-items: center;
  padding: clamp(18px, 3.2vw, 34px);
  border: 1px solid var(--line);
  background:
    linear-gradient(152deg, rgba(14, 42, 35, 0.94), rgba(7, 11, 10, 0.97) 64%);
  box-shadow: 5px 5px 0 rgba(7, 11, 10, 0.65), inset 0 0 0 1px var(--hair);
}

.page-faq .faq-hero::before,
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 1px;
  background: var(--lime);
  opacity: 0.75;
}

.page-faq .faq-hero::before {
  top: -1px;
  left: -1px;
}

.page-faq .faq-hero::after {
  bottom: -1px;
  right: -1px;
}

.page-faq .faq-hero-main {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-lede {
  margin: 14px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .faq-quickstat {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 22px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--hair);
}

.page-faq .faq-quickstat li {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-faq .faq-quickstat-num {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-quickstat-num small {
  margin-left: 2px;
  font-size: 11px;
  color: var(--sage);
}

.page-faq .faq-quickstat-txt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-faq .faq-hero-figure {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 快速索引 ---------- */
.page-faq .faq-index {
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-index-head {
  display: grid;
  gap: 8px;
}

.page-faq .faq-index-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.15;
  color: var(--paper);
}

.page-faq .faq-index-lead {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-text);
}

.page-faq .faq-index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index-card {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  gap: 3px 12px;
  padding: 13px 14px;
  border: 1px solid var(--line-soft);
  background: rgba(23, 28, 26, 0.72);
  color: var(--paper);
  text-decoration: none;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-index-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--lime);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.22s ease;
}

.page-faq .faq-index-card:hover,
.page-faq .faq-index-card:focus-visible {
  border-color: rgba(200, 255, 61, 0.55);
  background: rgba(14, 42, 35, 0.9);
}

.page-faq .faq-index-card:hover::before,
.page-faq .faq-index-card:focus-visible::before {
  transform: scaleY(1);
}

.page-faq .faq-index-card:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-index-num {
  grid-area: num;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .faq-index-name {
  grid-area: name;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.page-faq .faq-index-desc {
  grid-area: desc;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--sage);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(18px, 3vw, 34px);
  margin-top: clamp(24px, 4vw, 44px);
}

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

.page-faq .faq-rail-title {
  display: none;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--sage);
}

.page-faq .faq-rail-nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 2px 0 8px;
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: thin;
}

.page-faq .faq-rail-nav a {
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.4;
  color: var(--body-text);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-rail-nav a span {
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sage);
}

.page-faq .faq-rail-nav a:hover,
.page-faq .faq-rail-nav a:focus-visible {
  color: var(--paper);
  border-color: rgba(200, 255, 61, 0.6);
  background: rgba(200, 255, 61, 0.06);
}

.page-faq .faq-rail-nav a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-columns {
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 3.6vw, 42px);
  min-width: 0;
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 92px;
  min-width: 0;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.15;
  color: var(--paper);
}

.page-faq .faq-group-sub {
  margin: 5px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

.page-faq .faq-group:target .faq-group-head {
  border-bottom-color: rgba(200, 255, 61, 0.6);
}

.page-faq .faq-group:target .panel-index {
  background: var(--lime);
  color: var(--ink);
}

/* ---------- 30 秒刻度条 ---------- */
.page-faq .faq-tick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  margin-bottom: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--orange);
  background: rgba(23, 28, 26, 0.78);
}

.page-faq .faq-tick-svg {
  flex: none;
  width: 168px;
  height: auto;
}

.page-faq .faq-tick p {
  margin: 0;
  flex: 1 1 200px;
  min-width: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--sage);
}

/* ---------- 问答卡 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(23, 28, 26, 0.92), rgba(14, 42, 35, 0.55));
  box-shadow: 3px 3px 0 rgba(7, 11, 10, 0.55);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .faq-item:hover {
  border-color: var(--steel);
  box-shadow: 3px 3px 0 rgba(7, 11, 10, 0.75), inset 0 0 0 1px rgba(236, 231, 218, 0.06);
}

.page-faq .faq-item[open] {
  border-color: rgba(200, 255, 61, 0.5);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: var(--faq-pad);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-q-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sage);
  transition: color 0.18s ease;
}

.page-faq .faq-item:hover .faq-q-num {
  color: var(--orange);
}

.page-faq .faq-item[open] .faq-q-num {
  color: var(--lime);
}

.page-faq .faq-q-body {
  display: block;
  min-width: 0;
}

.page-faq .faq-q-text {
  display: block;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-q-hint {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--sage);
}

.page-faq .faq-item[open] .faq-q-hint {
  display: none;
}

.page-faq .faq-q-mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  border: 1px solid var(--line);
  transition: border-color 0.18s ease;
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  background: var(--sage);
  transition: transform 0.2s ease, background 0.2s ease;
}

.page-faq .faq-q-mark::before {
  top: 3px;
  bottom: 3px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-faq .faq-q-mark::after {
  left: 3px;
  right: 3px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-item[open] .faq-q-mark {
  border-color: var(--lime);
}

.page-faq .faq-item[open] .faq-q-mark::before {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-item[open] .faq-q-mark::after {
  background: var(--lime);
}

.page-faq .faq-a {
  padding: 12px var(--faq-pad) 16px clamp(14px, 4vw, 58px);
  border-top: 1px solid var(--hair);
  background: linear-gradient(180deg, rgba(14, 42, 35, 0.32), transparent);
}

.page-faq .faq-a p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

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

.page-faq .faq-a a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(86, 224, 210, 0.35);
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

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

/* ---------- 设备示意 ---------- */
.page-faq .faq-device-figure {
  margin: 0 0 14px;
}

.page-faq .faq-device-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 底部联系条 ---------- */
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid rgba(200, 255, 61, 0.35);
  background: linear-gradient(120deg, rgba(200, 255, 61, 0.08), rgba(14, 42, 35, 0.65));
}

.page-faq .faq-cta p {
  margin: 0;
  flex: 1 1 260px;
  min-width: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-index-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

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

  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-rail-title {
    display: block;
  }

  .page-faq .faq-rail-nav {
    display: block;
    overflow: visible;
    padding: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-faq .faq-rail-nav a {
    display: block;
    margin-left: -1px;
    padding: 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    white-space: normal;
    font-size: 13.5px;
  }

  .page-faq .faq-rail-nav a:hover,
  .page-faq .faq-rail-nav a:focus-visible {
    background: rgba(200, 255, 61, 0.07);
    border-left-color: var(--lime);
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
  }
}
<<<END>>>
```