.page-faq {
  --faq-gap: clamp(1.5rem, 4vw, 3.25rem);
  --faq-radius: var(--r-md);
  background:
    radial-gradient(120% 58% at 88% -6%, rgba(43, 232, 210, .13), transparent 60%),
    radial-gradient(80% 44% at 0% 14%, rgba(255, 106, 43, .08), transparent 62%),
    var(--sky-night);
  color: var(--sky-white);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
  overflow-x: hidden;
}

/* ---------- 封面区 ---------- */
.page-faq .faq-cover {
  padding: clamp(1.5rem, 4.5vw, 3rem) 0 clamp(1.5rem, 4vw, 2.75rem);
  border-bottom: 1px solid var(--sky-line);
}

.page-faq .faq-cover__eyebrow {
  margin: 1.1rem 0 .5rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sky-cyan);
}

.page-faq .faq-cover__title {
  margin: 0 0 1rem;
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(1.85rem, 6.2vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -.015em;
  max-width: 24ch;
  color: var(--sky-white);
}

.page-faq .faq-cover__lead {
  max-width: 62ch;
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--sky-mist);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.35rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chip {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  padding: .45rem .9rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--sky-line);
  background: rgba(22, 36, 63, .62);
  color: var(--sky-mist);
  white-space: nowrap;
}

/* ---------- 主体分屏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(1.5rem, 4vw, 2.75rem);
}

/* ---------- 左侧问题目录 ---------- */
.page-faq .faq-rail__box {
  border: 1px solid var(--sky-line);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, rgba(22, 36, 63, .92), rgba(14, 24, 48, .92));
  padding: 1.1rem;
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-rail__title {
  margin: 0 0 .75rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--sky-mist);
}

.page-faq .faq-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__list a {
  display: block;
  padding: .5rem .7rem;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  font-size: .875rem;
  line-height: 1.5;
  color: var(--sky-mist);
  text-decoration: none;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  background: var(--sky-raise);
  color: var(--sky-white);
  border-left-color: var(--sky-cyan);
}

.page-faq .faq-filter {
  display: block;
  margin-top: 1.15rem;
}

.page-faq .faq-filter__label {
  display: block;
  margin-bottom: .4rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--sky-mist);
}

.page-faq .faq-filter__input {
  width: 100%;
  box-sizing: border-box;
  min-height: 44px;
  padding: .6rem .8rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--sky-line);
  background: var(--sky-night-deep);
  color: var(--sky-white);
  font-family: var(--font-mono);
  font-size: .82rem;
}

.page-faq .faq-filter__input::placeholder {
  color: #5f7396;
  font-family: var(--font-mono);
}

.page-faq .faq-filter__input:focus-visible {
  outline: 2px solid var(--sky-cyan);
  outline-offset: 2px;
  border-color: var(--sky-cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: clamp(2rem, 5vw, 3.25rem);
  border-top: 1px solid var(--sky-line);
}

.page-faq .faq-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .4rem .8rem;
  align-items: baseline;
  margin-bottom: 1.35rem;
}

.page-faq .faq-sec__idx {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--sky-cyan);
  border: 1px solid rgba(43, 232, 210, .38);
  border-radius: var(--r-pill);
  padding: .18rem .6rem;
  align-self: start;
}

.page-faq .faq-sec__head h2 {
  margin: 0;
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: clamp(1.3rem, 4vw, 2rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--sky-white);
}

.page-faq .faq-sec__sub {
  grid-column: 1 / -1;
  margin: .3rem 0 0;
  max-width: 66ch;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--sky-mist);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: .65rem;
}

.page-faq .faq-list--tight {
  margin-top: 1rem;
}

.page-faq .faq-item {
  position: relative;
  border: 1px solid var(--sky-line);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, rgba(22, 36, 63, .74), rgba(14, 24, 48, .74));
  overflow: hidden;
  transition: border-color .22s ease, background-color .22s ease;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--sky-cyan);
  border-radius: 0 3px 3px 0;
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .28s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(43, 232, 210, .42);
}

.page-faq .faq-item[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-item summary {
  position: relative;
  display: block;
  padding: 1rem 3rem 1rem 1.15rem;
  min-height: 44px;
  box-sizing: border-box;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--sky-white);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item summary::after {
  content: "";
  position: absolute;
  right: 1.15rem;
  top: calc(50% - 7px);
  width: 14px;
  height: 14px;
  background:
    linear-gradient(var(--sky-cyan), var(--sky-cyan)) center / 14px 2px no-repeat,
    linear-gradient(var(--sky-cyan), var(--sky-cyan)) center / 2px 14px no-repeat;
  transition: transform .28s ease;
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(45deg);
}

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

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

.page-faq .faq-item__body {
  padding: 0 1.25rem 1.15rem;
  max-width: 68ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--sky-mist);
}

.page-faq .faq-item__body strong {
  color: var(--sky-cyan);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-item__body a {
  color: var(--sky-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  color: var(--sky-cyan-soft);
}

/* ---------- 图片容器 ---------- */
.page-faq .faq-figure {
  margin: 0 0 1.35rem;
  border: 1px solid var(--sky-line);
  border-radius: var(--r-lg);
  background: var(--sky-panel);
  overflow: hidden;
  box-shadow: var(--shadow-panel);
}

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

.page-faq .faq-figure figcaption {
  padding: .7rem 1.1rem;
  border-top: 1px solid var(--sky-line);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--sky-mist);
}

.page-faq .faq-figure--tall {
  margin-bottom: 0;
}

/* ---------- 订阅区并排布局 ---------- */
.page-faq .faq-duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.35rem;
}

/* ---------- 提醒节点大号数字 ---------- */
.page-faq .faq-metric {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin-top: 1.35rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--sky-line);
  border-radius: var(--faq-radius);
  background: rgba(14, 24, 48, .7);
}

.page-faq .faq-metric__row {
  display: flex;
  align-items: baseline;
  gap: .6rem;
}

.page-faq .faq-metric__num {
  font-family: var(--font-cond);
  font-size: clamp(2.2rem, 8vw, 3.4rem);
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--sky-yellow);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-metric__unit {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .07em;
  color: var(--sky-mist);
}

/* ---------- 数据脉冲条 ---------- */
.page-faq .faq-pulse {
  margin-bottom: 1.35rem;
  padding: .9rem 1.1rem .7rem;
  border: 1px solid var(--sky-line);
  border-radius: var(--faq-radius);
  background: rgba(14, 24, 48, .68);
}

.page-faq .faq-pulse svg {
  display: block;
  width: 100%;
  height: 52px;
}

.page-faq .faq-pulse polyline {
  animation: faq-glow 2.6s ease-in-out infinite;
}

@keyframes faq-glow {
  0%, 100% { opacity: .5; }
  50% { opacity: 1; }
}

.page-faq .faq-pulse__cap {
  margin: .5rem 0 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .07em;
  color: var(--sky-cyan);
}

/* ---------- 联系方式 ---------- */
.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .75rem;
}

.page-faq .faq-contact__item {
  border: 1px solid var(--sky-line);
  border-radius: var(--faq-radius);
  padding: .9rem 1.05rem;
  background: rgba(22, 36, 63, .58);
}

.page-faq .faq-contact__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--sky-mist);
}

.page-faq .faq-contact__value {
  margin: .35rem 0 0;
  font-size: .98rem;
  line-height: 1.6;
  color: var(--sky-white);
  word-break: break-word;
}

/* ---------- 规则入口链接卡 ---------- */
.page-faq .faq-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .85rem;
}

.page-faq .faq-link {
  display: block;
  padding: 1.05rem 1.15rem;
  border: 1px solid var(--sky-line);
  border-radius: var(--faq-radius);
  background: rgba(14, 24, 48, .72);
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--sky-cyan);
  background: rgba(22, 36, 63, .85);
}

.page-faq .faq-link__title {
  display: block;
  font-family: var(--font-cond);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--sky-white);
}

.page-faq .faq-link__text {
  display: block;
  margin-top: .4rem;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--sky-mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-contact,
  .page-faq .faq-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-duo {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(210px, 264px) minmax(0, 1fr);
  }

  .page-faq .faq-rail__box {
    position: sticky;
    top: calc(var(--head-h) + .75rem);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: .1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-pulse polyline {
    animation: none;
    opacity: .85;
  }

  .page-faq .faq-item::before,
  .page-faq .faq-item summary::after,
  .page-faq .faq-link {
    transition: none;
  }

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