.page-faq {
  --faq-sticky-top: calc(var(--bar-h) + 18px);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  padding: 22px 0 34px;
  border-bottom: 2px solid var(--line);
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 5px),
    var(--ink);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: 20px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 7.2vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ash);
}

.page-faq .faq-quick {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-faq .faq-quick__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 12px 14px;
  background: var(--panel);
  color: var(--paper);
  text-decoration: none;
  transition: background 140ms var(--ease), color 140ms var(--ease);
}

.page-faq .faq-quick__item:hover,
.page-faq .faq-quick__item:focus-visible {
  background: var(--lime);
  color: var(--ink);
}

.page-faq .faq-quick__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
  padding-top: 3px;
}

.page-faq .faq-quick__item:hover .faq-quick__idx,
.page-faq .faq-quick__item:focus-visible .faq-quick__idx {
  color: var(--ink);
}

.page-faq .faq-quick__text {
  font-size: 15px;
  line-height: 1.5;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure .figure__media {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border: 2px solid var(--line);
  background: var(--panel-2);
}

.page-faq .faq-hero__figure .figure__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============ 主体两栏 ============ */
.page-faq .faq-layout {
  display: grid;
  gap: 26px;
  padding: 30px 0 40px;
}

.page-faq .faq-index {
  border: 2px solid var(--line);
  background: var(--panel);
  padding: 16px;
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 11px 12px;
  background: var(--panel);
  color: var(--paper);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-color 140ms var(--ease), background 140ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--lime);
  background: var(--panel-2);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ash);
}

.page-faq .faq-index__name {
  font-size: 15px;
  color: var(--paper);
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ash);
}

/* ============ 分组 ============ */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 16px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 38px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(24px, 3.4vw, 32px);
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ash);
}

/* ============ 折叠问答 ============ */
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
  background: transparent;
  transition: box-shadow 160ms var(--ease), background 160ms var(--ease);
}

.page-faq .qa[open] {
  box-shadow: inset 3px 0 0 var(--lime);
  background: linear-gradient(90deg, rgba(198, 255, 61, 0.06), rgba(198, 255, 61, 0) 62%);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 14px 12px 14px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--moss);
  padding-top: 4px;
}

.page-faq .qa[open] .qa__num {
  color: var(--lime);
}

.page-faq .qa__q {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .qa__summary:hover .qa__q,
.page-faq .qa__summary:focus-visible .qa__q {
  text-decoration: underline;
  text-decoration-color: var(--lime);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.page-faq .qa__mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1.5px solid var(--ash);
  border-radius: 2px;
  flex: none;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--ash);
  transition: opacity 140ms var(--ease), transform 140ms var(--ease);
}

.page-faq .qa__mark::before {
  left: 3px;
  right: 3px;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .qa__mark::after {
  top: 3px;
  bottom: 3px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .qa[open] .qa__mark {
  border-color: var(--lime);
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--lime);
}

.page-faq .qa[open] .qa__mark::after {
  background: var(--lime);
  opacity: 0;
  transform: translateX(-50%) scaleY(0);
}

.page-faq .qa__body {
  padding: 2px 14px 20px;
}

.page-faq .qa__body p {
  margin: 0 0 10px;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ash);
}

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

.page-faq .qa__body a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 140, 255, 0.45);
  transition: color 140ms var(--ease), border-color 140ms var(--ease);
}

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

/* ============ 设备示意图 ============ */
.page-faq .faq-figure {
  margin: 20px 0 22px;
  max-width: 620px;
}

.page-faq .faq-figure .figure__media {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 2px solid var(--line);
  background: var(--panel-2);
}

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

.page-faq .faq-figure .figure__caption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ash);
}

/* ============ 自查三步 ============ */
.page-faq .faq-check {
  margin: 34px 0 6px;
  padding: 22px 18px 24px;
  background: var(--bone);
  color: var(--ink);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-check__head {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-check .eyebrow {
  color: var(--moss);
}

.page-faq .faq-check__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(22px, 4.6vw, 32px);
  line-height: 1.2;
  letter-spacing: 0.005em;
  color: var(--ink);
}

.page-faq .faq-check__steps {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .faq-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.page-faq .faq-step__title {
  display: block;
  margin-top: 10px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .faq-step__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--moss);
}

.page-faq .faq-check__tail {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(8, 18, 15, 0.2);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

/* ============ 联系块 ============ */
.page-faq .faq-contact {
  margin: 40px 0 56px;
}

.page-faq .faq-contact__panel {
  border: 2px solid var(--lime);
  background: var(--panel);
  padding: 24px 20px;
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-contact__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 5vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-contact__lead {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ash);
}

.page-faq .faq-contact__list {
  margin: 22px 0 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 11px 12px;
  background: var(--panel-2);
}

.page-faq .faq-contact__row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ash);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__row dd a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.5);
}

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

.page-faq .faq-contact__legal {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.8;
  color: var(--ash);
}

.page-faq .faq-contact__legal a {
  color: var(--ash);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

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

/* ============ 响应式 ============ */
@media (min-width: 480px) {
  .page-faq .faq-index__list {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-quick {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-quick li:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding: 26px 0 44px;
  }

  .page-faq .faq-check {
    padding: 26px 24px 28px;
  }

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

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

  .page-faq .faq-step:first-child {
    padding-left: 0;
  }

  .page-faq .faq-step:last-child {
    padding-right: 0;
  }

  .page-faq .faq-step + .faq-step {
    border-left: 1px solid rgba(8, 18, 15, 0.18);
  }

  .page-faq .faq-contact__panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: 32px;
    align-items: start;
    padding: 30px 28px;
  }

  .page-faq .faq-contact__list {
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 34px;
    align-items: start;
  }

  .page-faq .faq-quick {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-quick li:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
    padding: 38px 0 48px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
  }

  .page-faq .faq-index__list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-check {
    margin: 40px 0 8px;
  }

  .page-faq .qa__summary {
    padding: 16px 16px 16px 18px;
  }

  .page-faq .qa__body {
    padding: 2px 16px 22px 42px;
  }

  .page-faq .qa__q {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-quick__item,
  .page-faq .faq-index__link,
  .page-faq .qa__body a {
    transition: none;
  }
}
<<<END>>>