.page-faq {
  --faq-pad: clamp(18px, 4vw, 32px);
  background-color: var(--abyss);
  color: var(--ice);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq .breadcrumb {
  padding: 18px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 20px;
  padding: 28px 0 32px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  color: var(--ice);
  text-wrap: balance;
}

.page-faq .faq-hero__aside {
  display: grid;
  gap: 12px;
  color: var(--cool);
  font-size: 15px;
  line-height: 1.78;
  border-left: 2px solid var(--steel);
  padding-left: 16px;
}

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

/* ---------- 横向步骤导航 ---------- */
.page-faq .step-nav {
  position: sticky;
  top: var(--mast-h);
  z-index: 6;
  background-color: rgba(6, 20, 38, 0.94);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(8px, 2vw, 16px);
}

.page-faq .step-nav__list {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 10px var(--faq-pad);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .step-nav__list::-webkit-scrollbar {
  display: none;
}

.page-faq .step-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--cool);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t-fast), color var(--t-fast), background-color var(--t-fast);
}

.page-faq .step-nav__link .num {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .step-nav__link:hover,
.page-faq .step-nav__link:focus-visible {
  border-color: var(--lime);
  color: var(--ice);
  background-color: rgba(59, 240, 166, 0.07);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding: clamp(36px, 6vw, 64px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px 14px;
  align-items: start;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-section__num {
  grid-row: 1;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink);
  background-color: var(--lime);
  padding: 3px 7px;
  align-self: start;
  margin-top: 4px;
}

.page-faq .faq-section__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 4vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .faq-section__note {
  grid-column: 2;
  grid-row: 2;
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
  max-width: 42ch;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--line);
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa__q {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ice);
  transition: color var(--t-fast);
}

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

.page-faq .qa__q:hover {
  color: var(--lime);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-faq .qa__arrow {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 6px;
}

.page-faq .qa__arrow::before,
.page-faq .qa__arrow::after {
  content: "";
  position: absolute;
  top: 6px;
  width: 9px;
  height: 1.5px;
  background-color: var(--lime);
  transition: transform var(--t-mid);
}

.page-faq .qa__arrow::before {
  left: 0;
  transform: rotate(45deg);
}

.page-faq .qa__arrow::after {
  right: 0;
  transform: rotate(-45deg);
}

.page-faq .qa[open] .qa__arrow::before {
  transform: rotate(-45deg);
}

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

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

.page-faq .qa__body {
  padding: 2px 0 22px 30px;
  color: var(--cool);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .qa__body > p {
  margin: 0 0 12px;
}

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

.page-faq .qa[open] .qa__body {
  animation: faqFade var(--t-mid) both;
}

@keyframes faqFade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 步骤序号列 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .steps__item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .steps__num {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  background-color: var(--lime);
  color: var(--ink);
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 700;
}

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

/* ---------- 筛选条件拼图 ---------- */
.page-faq .filter-map {
  display: grid;
  gap: 8px;
  margin: 0 0 24px;
}

.page-faq .filter-map__step {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 13px 15px;
  background-color: var(--deck);
  border: 1px solid var(--line);
}

.page-faq .filter-map__step-num {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .filter-map__step-name {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--ice);
}

.page-faq .filter-map__step-desc {
  font-size: 13px;
  line-height: 1.62;
  color: var(--cool);
}

/* ---------- 排错对照 ---------- */
.page-faq .troubleshoot {
  margin: 4px 0 0;
  border-top: 1px solid var(--line);
}

.page-faq .troubleshoot__head {
  display: none;
}

.page-faq .troubleshoot__row {
  display: grid;
  gap: 5px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .troubleshoot__sym {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ice);
}

.page-faq .troubleshoot__fix {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--cool);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 24px 0 4px;
}

.page-faq .faq-figure--narrow {
  max-width: 360px;
}

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

/* ---------- 结尾通道 ---------- */
.page-faq .faq-next {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(22px, 4vw, 38px);
  background-color: var(--deck);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  display: grid;
  gap: 22px;
}

.page-faq .faq-next h2 {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3.4vw, 27px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .faq-next__body p {
  margin: 0;
  color: var(--cool);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-next__links {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .faq-next__links a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 166, 0.35);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .filter-map {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .filter-map__step::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -18px;
    width: 18px;
    height: 1px;
    background-color: var(--steel);
  }

  .page-faq .filter-map__step:last-child::after {
    display: none;
  }

  .page-faq .troubleshoot__head,
  .page-faq .troubleshoot__row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.45fr);
    gap: 24px;
  }

  .page-faq .troubleshoot__head {
    display: grid;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
    font-family: var(--font-num);
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--steel);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: 56px;
    padding: 56px 0 44px;
  }

  .page-faq .faq-hero__aside {
    padding-left: 20px;
  }

  .page-faq .faq-section__head {
    grid-template-columns: auto minmax(0, 5.5fr) minmax(0, 4.5fr);
    gap: 14px 28px;
  }

  .page-faq .faq-section__note {
    grid-column: 3;
    grid-row: 1;
    margin-top: 6px;
    justify-self: end;
    text-align: right;
  }

  .page-faq .qa__q {
    font-size: 17px;
    padding: 19px 0;
  }

  .page-faq .qa__body {
    padding: 4px 0 26px 30px;
    font-size: 16px;
  }

  .page-faq .faq-next {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
    gap: 48px;
  }
}

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

  .page-faq .qa__arrow::before,
  .page-faq .qa__arrow::after,
  .page-faq .step-nav__link,
  .page-faq .qa__q {
    transition: none;
  }
}
<<<END>>>