.page-faq {
  --faq-pad: clamp(14px, 2.2vw, 22px);
  background: var(--bg);
  color: var(--bone);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 30px) 0 clamp(30px, 5vw, 54px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(90% 130% at 94% -20%, rgba(100, 245, 178, 0.11), transparent 62%),
    var(--bg);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: -8%;
  bottom: -140px;
  width: 64%;
  height: 260px;
  border-top: 1px solid var(--line);
  transform: rotate(-7deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: 42%;
  width: 40%;
  height: 200px;
  border-left: 1px solid rgba(100, 245, 178, 0.16);
  transform: rotate(24deg);
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 40px);
  align-items: start;
  margin-top: clamp(18px, 3vw, 30px);
}

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

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.15rem, 6.4vw, 4.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--bone);
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  margin: 16px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 设备面板 ---------- */
.page-faq .faq-hero-panel {
  min-width: 0;
  padding: var(--faq-pad);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(23, 42, 36, 0.92), rgba(10, 20, 17, 0.94));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-hero-panel-title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .device-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .device-tab {
  display: flex;
  flex-direction: column;
  gap: 5px;
  height: 100%;
  padding: 12px 11px;
  border: 1px solid var(--line);
  background: rgba(10, 20, 17, 0.6);
  color: var(--mist);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .device-tab:hover,
.page-faq .device-tab:focus-visible {
  border-color: var(--accent);
  background: rgba(100, 245, 178, 0.09);
  color: var(--bone);
}

.page-faq .device-icon {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-linecap: round;
}

.page-faq .device-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.02em;
  line-height: 1.2;
  color: inherit;
}

.page-faq .device-note {
  font-size: 11.5px;
  line-height: 1.4;
  color: var(--dim);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.5vw, 44px);
  padding: clamp(28px, 4.5vw, 56px) 0 clamp(44px, 6vw, 76px);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--dim);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index-list li {
  flex: none;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--mist);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--bone);
  border-color: var(--accent);
  background: rgba(100, 245, 178, 0.07);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim);
}

.page-faq .faq-index-link:hover .faq-index-num,
.page-faq .faq-index-link:focus-visible .faq-index-num {
  color: var(--accent);
}

.page-faq .faq-index-tip {
  display: none;
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--dim);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  min-width: 0;
  scroll-margin-top: 88px;
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(34px, 5vw, 58px);
}

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

.page-faq .faq-sec-num {
  flex: none;
  margin-top: 4px;
  padding: 6px 7px;
  border: 1px solid rgba(100, 245, 178, 0.35);
  background: rgba(100, 245, 178, 0.06);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  color: var(--accent);
}

.page-faq .faq-section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-faq .faq-section-desc {
  max-width: 52ch;
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 0;
  border: 1px solid var(--line);
  background: var(--bg-deep);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-serif);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--dim);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  margin-top: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--dim);
}

.page-faq .faq-item[open] {
  border-color: rgba(100, 245, 178, 0.45);
  background: var(--bg-deep);
}

.page-faq .faq-q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 46px 14px 16px;
  list-style: none;
  cursor: pointer;
  color: var(--bone);
  font-size: 15.5px;
  line-height: 1.6;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--accent);
}

.page-faq .faq-item[open] .faq-q::after {
  content: "−";
}

.page-faq .faq-q-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--dim);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-a {
  margin: 0 16px;
  padding: 14px 0 18px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .faq-a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item[open] > .faq-a {
  animation: faq-answer-in 0.3s var(--ease) both;
}

@keyframes faq-answer-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.page-faq .faq-steps {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .faq-step-num {
  padding: 2px 0;
  border: 1px solid rgba(100, 245, 178, 0.3);
  font-family: var(--font-mono);
  font-size: 11px;
  text-align: center;
  color: var(--accent);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-help-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.page-faq .faq-help-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-help-label {
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--dim);
}

.page-faq .faq-help-value {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  color: var(--accent);
  word-break: break-word;
}

.page-faq .faq-help-hint {
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-more {
  margin: 20px 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: rgba(100, 245, 178, 0.06);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--bone);
}

.page-faq .device-tab:focus-visible,
.page-faq .faq-index-link:focus-visible,
.page-faq .faq-q:focus-visible,
.page-faq .faq-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-faq .device-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(32px, 5vw, 64px);
  }

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

  .page-faq .faq-q {
    font-size: 16px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
    align-self: start;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-link {
    border: 0;
    border-left: 2px solid transparent;
    padding: 8px 10px;
    white-space: normal;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    border-left-color: var(--accent);
  }

  .page-faq .faq-index-tip {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] > .faq-a {
    animation: none;
  }

  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .device-tab,
  .page-faq .faq-index-link,
  .page-faq .faq-link {
    transition: none;
  }
}
<<<END>>>