.page-faq {
  --faq-rail-w: 262px;
  --faq-soft-line: rgba(199,194,180,.14);
  color: var(--board);
  background: var(--ink);
}

/* ---------- 首屏横幅 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px,3.4vw,40px) 0 clamp(36px,5vw,68px);
  background:
    radial-gradient(760px 420px at 86% -20%, rgba(240,78,35,.3), transparent 62%),
    radial-gradient(560px 360px at 6% 118%, rgba(111,227,210,.14), transparent 66%),
    linear-gradient(178deg, var(--ink) 0%, var(--turf) 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(168,180,154,.06) 0 1px, transparent 1px 46px);
  mask-image: linear-gradient(180deg, transparent, #000 60%, transparent);
  opacity: .7;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px,3vw,36px);
  align-items: end;
}

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

.page-faq .faq-hero .nt-crumbs {
  margin-bottom: clamp(16px,2.6vw,26px);
}

.page-faq .faq-hero__title {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(30px,6.2vw,58px);
  line-height: 1.1;
  letter-spacing: -.022em;
  color: var(--board);
  max-width: 16em;
}

.page-faq .faq-hero__lede {
  margin: 0 0 clamp(18px,2.6vw,26px);
  max-width: 40ch;
  font-size: clamp(14px,1.6vw,16px);
  line-height: 1.8;
  color: var(--stone);
}

.page-faq .faq-hero__jump {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
}

.page-faq .faq-hero__visual {
  margin: 0;
  position: relative;
}

.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  height: clamp(180px, 30vw, 320px);
  object-fit: cover;
  border-radius: var(--r-xl);
  border: 1px solid rgba(240,78,35,.26);
  box-shadow: var(--glow-lava);
  filter: saturate(.94) contrast(1.04);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(34px,5vw,72px) 0 clamp(52px,8vw,104px);
  background: linear-gradient(180deg, var(--ink) 0%, var(--turf) 46%, var(--ink) 100%);
}

.page-faq .faq-shell {
  display: grid;
  gap: clamp(22px,3vw,40px);
  min-width: 0;
}

/* ---------- 分类导航 ---------- */
.page-faq .faq-rail {
  min-width: 0;
  padding: 16px 16px 18px;
  border-radius: var(--r-lg);
  background: linear-gradient(170deg, rgba(28,43,36,.92), rgba(16,32,26,.92));
  border: 1px solid var(--line);
}

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

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__item {
  flex: none;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  color: var(--stone);
  font-size: 13.5px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: color .22s ease, border-color .22s ease, background-color .22s ease;
}

.page-faq .faq-rail__no {
  font-family: var(--font-data);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--lava);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--board);
  border-color: rgba(240,78,35,.68);
  background: rgba(240,78,35,.12);
  outline: none;
}

.page-faq .faq-rail__link:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan);
}

.page-faq .faq-rail__note {
  display: none;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-soft-line);
  color: var(--stone);
  font-size: 13px;
  line-height: 1.75;
}

.page-faq .faq-rail__note p {
  margin: 0;
}

.page-faq .faq-rail__note .nt-note__title {
  margin-bottom: 6px;
  color: var(--board);
  font-weight: 600;
  font-size: 13.5px;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(22px,3vw,38px);
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  min-width: 0;
  padding: clamp(20px,3.4vw,40px) clamp(18px,3vw,38px) clamp(12px,2vw,22px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(16,32,26,.94), rgba(28,43,36,.78));
  overflow: hidden;
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--lava), transparent 62%);
  opacity: .5;
}

.page-faq .faq-group--help {
  border-color: rgba(240,78,35,.34);
  background:
    radial-gradient(520px 300px at 92% 0%, rgba(240,78,35,.2), transparent 64%),
    linear-gradient(158deg, rgba(16,32,26,.96), rgba(11,20,16,.96));
}

.page-faq .faq-group__head {
  position: relative;
  padding-bottom: 16px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--faq-soft-line);
}

.page-faq .faq-group__num {
  position: absolute;
  top: -2px;
  right: -2px;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: clamp(44px,8vw,84px);
  line-height: .82;
  color: var(--lava);
  opacity: .18;
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-group__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px,2.6vw,27px);
  line-height: 1.2;
  letter-spacing: -.012em;
  color: var(--board);
  padding-right: 60px;
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 44ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  min-width: 0;
}

.page-faq .nt-qa {
  border-bottom: 1px solid var(--faq-soft-line);
}

.page-faq .nt-qa:last-child {
  border-bottom: 0;
}

.page-faq .nt-qa__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 17px 0;
  margin: 0;
  border: 0;
  background: none;
  color: var(--board);
  font-family: var(--font-body);
  font-size: clamp(14.5px,1.5vw,16.5px);
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color .2s ease;
}

.page-faq .nt-qa__q:hover,
.page-faq .nt-qa__q:focus-visible {
  color: var(--lava-soft);
}

.page-faq .nt-qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: var(--r-md);
}

.page-faq .nt-qa__sign {
  position: relative;
  flex: none;
  width: 32px;
  height: 32px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(111,227,210,.42);
  background: rgba(111,227,210,.06);
  transition: background-color .28s ease, border-color .28s ease;
}

.page-faq .nt-qa__sign::before,
.page-faq .nt-qa__sign::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
  transform: translate(-50%,-50%);
  transition: transform .28s ease, opacity .28s ease;
}

.page-faq .nt-qa__sign::before {
  width: 11px;
  height: 1.5px;
}

.page-faq .nt-qa__sign::after {
  width: 1.5px;
  height: 11px;
}

.page-faq .nt-qa[data-open="true"] .nt-qa__sign {
  background: rgba(240,78,35,.18);
  border-color: var(--lava);
}

.page-faq .nt-qa[data-open="true"] .nt-qa__sign::before {
  background: var(--lava-soft);
}

.page-faq .nt-qa[data-open="true"] .nt-qa__sign::after {
  opacity: 0;
  transform: translate(-50%,-50%) scaleY(0);
}

.page-faq .nt-qa__a {
  padding: 0 0 18px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--stone);
}

.page-faq .nt-qa[data-open="true"] .nt-qa__a {
  color: var(--stone);
}

.page-faq .faq-num {
  font-family: var(--font-data);
  font-weight: 600;
  font-size: .94em;
  letter-spacing: .01em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .nt-link {
  color: var(--lava-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,122,69,.42);
  transition: color .2s ease, border-color .2s ease;
}

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

/* ---------- 设备章节配图 ---------- */
.page-faq .faq-group__figure {
  margin: 18px 0 10px;
}

.page-faq .faq-group__figure img {
  display: block;
  width: 100%;
  height: clamp(180px,30vw,280px);
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  filter: saturate(.92) contrast(1.05);
}

.page-faq .faq-group__figure figcaption {
  margin-top: 10px;
  color: var(--moss);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-help__cols {
  display: grid;
  gap: clamp(18px,2.6vw,30px);
  padding-top: 6px;
}

.page-faq .faq-help__card {
  align-self: start;
  padding: clamp(18px,2.6vw,26px);
  border-radius: var(--r-lg);
  border: 1px solid rgba(111,227,210,.26);
  background: linear-gradient(165deg, rgba(28,43,36,.96), rgba(11,20,16,.96));
  box-shadow: var(--glow-cyan);
}

.page-faq .faq-help__card .nt-index {
  display: block;
  margin: 0 0 10px;
  color: var(--cyan);
}

.page-faq .faq-help__mail,
.page-faq .faq-help__tel {
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: clamp(14px,1.7vw,17px);
  letter-spacing: .01em;
  color: var(--board);
  word-break: break-all;
}

.page-faq .faq-help__tel {
  color: var(--lava-soft);
}

.page-faq .faq-help__rows {
  margin: 14px 0 18px;
  padding: 0;
}

.page-faq .faq-help__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-top: 1px solid var(--faq-soft-line);
}

.page-faq .faq-help__row dt {
  font-size: 12.5px;
  color: var(--moss);
}

.page-faq .faq-help__row dd {
  margin: 0;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: 12.5px;
  color: var(--stone);
}

.page-faq .faq-help__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 42px;
}

.page-faq .faq-help__tip {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0,1.02fr) minmax(0,.92fr);
    align-items: center;
  }

  .page-faq .faq-group__figure {
    margin-top: 22px;
  }

  .page-faq .faq-help__cols {
    grid-template-columns: minmax(0,1fr) minmax(0,.78fr);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0,1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    padding: 20px 18px 22px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    display: flex;
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--r-md);
    white-space: normal;
    font-size: 13.5px;
  }

  .page-faq .faq-rail__note {
    display: block;
  }

  .page-faq .faq-group__title {
    padding-right: 96px;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-hero__visual img {
    height: clamp(260px, 24vw, 340px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .nt-qa__q,
  .page-faq .nt-qa__sign,
  .page-faq .nt-qa__sign::before,
  .page-faq .nt-qa__sign::after,
  .page-faq .nt-link {
    transition: none;
  }
}
<<<END>>>