.page-faq {
  --faq-hair: rgba(167, 184, 176, .22);
  --faq-glow: rgba(55, 224, 200, .08);
  --faq-plate: #0C1F1A;
  padding-bottom: 8px;
}

/* 面包屑 */
.page-faq .page-faq__crumbs {
  padding-top: 18px;
  padding-bottom: 6px;
}

/* 首屏框景 */
.page-faq .faq-hero {
  padding: 12px 0 0;
}

.page-faq .faq-hero__frame {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--copper);
  background:
    linear-gradient(148deg, rgba(55, 224, 200, .12) 0%, rgba(55, 224, 200, 0) 46%),
    linear-gradient(0deg, rgba(242, 194, 75, .07), rgba(242, 194, 75, 0) 62%),
    var(--ink-1);
  box-shadow: var(--shadow-hard);
  padding: 26px 20px 24px;
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  top: 0;
  right: -70px;
  width: 210px;
  height: 210px;
  background: repeating-linear-gradient(115deg, rgba(242, 194, 75, .16) 0 2px, transparent 2px 14px);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--cyan) 0 10px, transparent 10px 26px);
  opacity: .55;
}

.page-faq .faq-hero__title {
  position: relative;
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 8vw, 54px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  position: relative;
  max-width: 34em;
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--mute);
}

.page-faq .faq-hero__meters {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-meter {
  display: flex;
  align-items: baseline;
  gap: 8px;
  border: 2px solid var(--ink-2);
  border-left: 3px solid var(--gold);
  background: rgba(6, 18, 15, .55);
  padding: 9px 14px;
}

.page-faq .faq-meter__num {
  font-family: var(--font-data);
  font-size: 21px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}

.page-faq .faq-meter__label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mute);
}

/* 主体：左筛选 + 右问答 */
.page-faq .faq-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 30px;
  padding-bottom: 42px;
}

.page-faq .faq-rail__box {
  border: 2px solid var(--ink-2);
  background: var(--ink-1);
  box-shadow: var(--shadow-soft);
  padding: 16px 14px 14px;
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  color: var(--cyan);
}

.page-faq .faq-filters {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-faq .filter-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 48px;
  padding: 11px 12px;
  border: 2px solid var(--ink-2);
  background: var(--ink-0);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--dur) ease, background var(--dur) ease, color var(--dur) ease, transform var(--dur) ease;
}

.page-faq .filter-btn:hover {
  border-color: var(--copper);
  transform: translateX(2px);
}

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

.page-faq .filter-btn[aria-pressed="true"] {
  border-color: var(--cyan);
  background: var(--ink-2);
  color: var(--cyan);
  box-shadow: inset 4px 0 0 var(--cyan);
}

.page-faq .faq-count {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--gold);
  background: rgba(242, 194, 75, .12);
  border: 1px solid rgba(242, 194, 75, .35);
  padding: 2px 7px;
  line-height: 1.3;
}

.page-faq .filter-btn[aria-pressed="true"] .faq-count {
  color: var(--ink-0);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--faq-hair);
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-rail__media {
  margin: 18px 0 0;
  border: 2px solid var(--ink-2);
  background: var(--ink-1);
}

.page-faq .faq-rail__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-rail__media .media__caption {
  display: block;
  padding: 8px 10px;
  font-family: var(--font-data);
  font-size: 11px;
  line-height: 1.6;
  color: var(--mute);
  border-top: 1px dashed var(--faq-hair);
}

/* 问答分组 */
.page-faq .faq-group {
  margin-bottom: 34px;
}

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

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  border-bottom: 2px solid var(--ink-2);
  padding-bottom: 10px;
  margin-bottom: 14px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 5vw, 28px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-group__title::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 10px;
  background: var(--gold);
  transform: translateY(-2px) rotate(45deg);
}

.page-faq .faq-group__note {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mute);
}

.page-faq .faq-group__figure {
  margin: 0 0 16px;
  border: 2px solid var(--ink-2);
  background: var(--ink-1);
  max-width: 340px;
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-group__figure .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-group__figure .media__caption {
  display: block;
  padding: 8px 10px;
  border-top: 1px dashed var(--faq-hair);
  font-family: var(--font-data);
  font-size: 11px;
  line-height: 1.6;
  color: var(--mute);
}

/* 折叠条目 */
.page-faq .faq-item {
  position: relative;
  margin-bottom: 10px;
  border: 2px solid var(--ink-2);
  border-left: 4px solid var(--copper);
  background: var(--faq-plate);
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}

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

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 10px;
  min-height: 56px;
  padding: 15px 14px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item__no {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold);
  padding-top: 4px;
}

.page-faq .faq-item__q {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--cyan);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 2px solid var(--mute);
  flex: none;
  transition: border-color var(--dur) ease, transform var(--dur) ease;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--mute);
  transition: opacity var(--dur) ease, background var(--dur) ease;
}

.page-faq .faq-item__sign::before {
  left: 2px;
  top: 5px;
  width: 8px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  left: 5px;
  top: 2px;
  width: 2px;
  height: 8px;
}

.page-faq .faq-item[open] .faq-item__sign {
  border-color: var(--cyan);
  transform: rotate(180deg);
}

.page-faq .faq-item[open] .faq-item__sign::before,
.page-faq .faq-item[open] .faq-item__sign::after {
  background: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 0 16px 16px 16px;
  border-top: 1px dashed var(--faq-hair);
  background: linear-gradient(180deg, var(--faq-glow), rgba(55, 224, 200, 0) 72%);
}

.page-faq .faq-item__lead {
  position: relative;
  margin: 14px 0 8px;
  padding-left: 12px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-item__lead::before {
  content: "";
  position: absolute;
  left: 0;
  top: .5em;
  width: 3px;
  height: 1em;
  background: var(--cyan);
}

.page-faq .faq-item__body p {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--mute);
  max-width: 38em;
}

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

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

.page-faq .faq-item__more a {
  color: var(--cyan);
  font-family: var(--font-data);
  font-size: 13px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__more a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* 联系引导 */
.page-faq .faq-help {
  padding: 6px 0 48px;
}

.page-faq .faq-help__card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  border: 2px solid var(--gold);
  background:
    linear-gradient(200deg, rgba(242, 194, 75, .1), rgba(242, 194, 75, 0) 58%),
    var(--ink-1);
  box-shadow: var(--shadow-hard);
  padding: 24px 20px;
}

.page-faq .faq-help__title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(22px, 5.4vw, 32px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-help__copy p {
  margin: 0 0 10px;
  max-width: 40em;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--mute);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-faq .faq-help__mail {
  border: 2px solid var(--ink-2);
  border-left: 4px solid var(--cyan);
  background: var(--ink-0);
  padding: 14px 16px;
}

.page-faq .faq-help__mail .data-label {
  margin: 0;
  color: var(--mute);
}

.page-faq .faq-help__mailaddr {
  margin: 4px 0 12px;
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1.6;
  color: var(--gold);
  word-break: break-all;
}

.page-faq .faq-help__mailaddr--addr {
  margin-bottom: 0;
  font-size: 13px;
  color: var(--paper);
  word-break: break-word;
}

/* 平板及以上 */
@media (min-width: 620px) {
  .page-faq .faq-hero__frame {
    padding: 34px 30px 30px;
  }

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

  .page-faq .faq-item__summary {
    padding: 16px 18px;
    gap: 14px;
  }

  .page-faq .faq-item__body {
    padding: 0 20px 18px 20px;
  }

  .page-faq .faq-help__card {
    padding: 30px 28px;
  }
}

/* 桌面：左侧轨道式筛选 + 右侧长列表 */
@media (min-width: 900px) {
  .page-faq .faq-hero__frame {
    padding: 44px 46px 38px;
  }

  .page-faq .faq-stage {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
    margin-top: 40px;
  }

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

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

  .page-faq .faq-group__figure {
    float: right;
    margin: 0 0 14px 18px;
    max-width: 300px;
  }

  .page-faq .faq-help__card {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
    gap: 32px;
    padding: 38px 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .filter-btn,
  .page-faq .faq-item,
  .page-faq .faq-item__sign,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }

  .page-faq .filter-btn:hover {
    transform: none;
  }
}
<<<END>>>