.page-faq {
  --faq-gap: clamp(16px, 3vw, 28px);
  --faq-track-line: 2px solid var(--line-strong);
  background: var(--bg-deep);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .faq-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 18px 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-strong);
}

.page-faq .breadcrumb__link {
  color: var(--muted);
  text-decoration: none;
}

.page-faq .breadcrumb__link:hover {
  color: var(--cyan);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(16px, 3vw, 28px) clamp(26px, 5vw, 48px);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 2px solid var(--line-strong);
  background:
    linear-gradient(155deg, rgba(12, 58, 46, 0.62) 0%, rgba(4, 23, 19, 0.35) 58%, rgba(11, 15, 14, 0.9) 100%);
  padding: clamp(20px, 4vw, 48px);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.page-faq .faq-hero__frame::before {
  top: -2px;
  left: -2px;
  border-top: 3px solid var(--cyan);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-hero__frame::after {
  right: -2px;
  bottom: -2px;
  border-right: 3px solid var(--orange);
  border-bottom: 3px solid var(--orange);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 54px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: #cfdcd6;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-hero__actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 14px;
  text-decoration: none;
}

.page-faq .faq-stats {
  display: grid;
  gap: 0;
  margin: 0;
  border-left: 2px solid var(--line-strong);
  padding-left: clamp(14px, 2.4vw, 24px);
}

.page-faq .faq-stat {
  padding-block: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-stat:first-child {
  padding-top: 0;
}

.page-faq .faq-stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-stat dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-stat dd {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--ink);
}

.page-faq .faq-stat__num {
  display: inline-block;
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.1;
  color: var(--cyan);
}

/* ---------- 章节标题 ---------- */
.page-faq .faq-track__head {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.page-faq .faq-track__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-track__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 34px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.005em;
}

.page-faq .faq-track__intro,
.page-faq .faq-track__head p:not(.faq-track__label) {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: #c3d2cb;
}

/* ---------- 故障类型卡 ---------- */
.page-faq .faq-topics {
  padding-block: clamp(28px, 5vw, 44px);
  border-top: var(--faq-track-line);
}

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

.page-faq .faq-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: 2px solid var(--line-strong);
  background: var(--bg-charcoal);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .faq-card:hover,
.page-faq .faq-card:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 6px 6px 0 rgba(53, 240, 200, 0.12);
}

.page-faq .faq-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid var(--line-strong);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink);
}

.page-faq .faq-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
}

.page-faq .faq-dot--high {
  background: var(--red);
}

.page-faq .faq-dot--mid {
  background: var(--yellow);
}

.page-faq .faq-dot--low {
  background: var(--cyan);
}

.page-faq .faq-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
}

.page-faq .faq-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #b9c9c2;
}

.page-faq .faq-card__go {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

/* ---------- 左右分栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

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

.page-faq .faq-track {
  padding-block: clamp(26px, 4vw, 42px);
  border-top: var(--faq-track-line);
  scroll-margin-top: calc(var(--nav-height) + 20px);
}

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

.page-faq .faq-track a:hover {
  color: var(--orange);
}

/* ---------- 图片 ---------- */
.page-faq .faq-shot {
  margin: 0 0 20px;
  border: 2px solid var(--line);
  background: var(--bg-charcoal);
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-shot figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 折叠步骤 ---------- */
.page-faq .faq-step {
  border: 1px solid var(--line);
  background: rgba(11, 15, 14, 0.62);
}

.page-faq .faq-step + .faq-step {
  margin-top: 8px;
}

.page-faq .faq-step summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-faq .faq-step__title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-step__chev {
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.18s ease;
}

.page-faq .faq-step[open] .faq-step__chev {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .faq-step__body {
  padding: 0 16px 16px 16px;
  font-size: 14.5px;
  line-height: 1.78;
  color: #c7d6cf;
}

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

/* ---------- 小状况 ---------- */
.page-faq .faq-minor {
  padding: 18px;
  border: 2px solid var(--line);
  background: rgba(12, 58, 46, 0.28);
  scroll-margin-top: calc(var(--nav-height) + 20px);
}

.page-faq .faq-minor + .faq-minor {
  margin-top: var(--faq-gap);
}

.page-faq .faq-minor__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.page-faq .faq-minor__head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}

.page-faq .faq-minor > p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.78;
  color: #c1d0c9;
}

/* ---------- 联系准备 ---------- */
.page-faq .faq-contact-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 0 0 18px;
}

.page-faq .faq-contact-item {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  background: rgba(11, 15, 14, 0.6);
}

.page-faq .faq-contact-item dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-contact-item dd {
  margin: 6px 0 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-prepare__note {
  margin: 0;
  max-width: 42em;
  font-size: 14px;
  line-height: 1.8;
  color: #b9c9c2;
}

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

/* ---------- 相关入口 ---------- */
.page-faq .faq-related {
  padding-block: clamp(26px, 4vw, 42px);
  border-top: var(--faq-track-line);
}

.page-faq .faq-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border: 2px solid var(--line-strong);
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 138, 61, 0.08);
}

.page-faq .faq-link__code {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- 侧边窄栏 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-faq .faq-rail__card {
  padding: 18px;
  border: 2px solid var(--line-strong);
  background: rgba(12, 58, 46, 0.4);
}

.page-faq .faq-rail__card--support {
  border-color: rgba(255, 138, 61, 0.5);
}

.page-faq .faq-rail__kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}

.page-faq .faq-jump {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(242, 247, 244, 0.1);
  color: var(--ink);
  font-size: 13.5px;
  line-height: 1.45;
  text-decoration: none;
}

.page-faq .faq-jump li:last-child .faq-jump__link {
  border-bottom: 0;
}

.page-faq .faq-jump__link:hover {
  color: var(--cyan);
}

.page-faq .faq-jump__code {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ---------- 自检清单 ---------- */
.page-faq .faq-check__meter {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 4px;
  margin-bottom: 12px;
}

.page-faq .faq-check__meter span {
  display: block;
  height: 6px;
  background: rgba(242, 247, 244, 0.16);
  transition: background 0.18s ease;
}

.page-faq .faq-check:has(#faq-c1:checked) .faq-check__meter span:nth-child(1),
.page-faq .faq-check:has(#faq-c2:checked) .faq-check__meter span:nth-child(2),
.page-faq .faq-check:has(#faq-c3:checked) .faq-check__meter span:nth-child(3),
.page-faq .faq-check:has(#faq-c4:checked) .faq-check__meter span:nth-child(4),
.page-faq .faq-check:has(#faq-c5:checked) .faq-check__meter span:nth-child(5) {
  background: var(--cyan);
}

.page-faq .faq-check__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-check__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 7px 0;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink);
  cursor: pointer;
}

.page-faq .faq-check__item input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-check__box {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 2px;
  border: 2px solid var(--muted);
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-check__item input:checked ~ .faq-check__box {
  border-color: var(--cyan);
  background: var(--cyan);
}

.page-faq .faq-check__item input:checked ~ .faq-check__box::after {
  content: "";
  position: absolute;
  top: 0;
  left: 4px;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--bg-deep);
  border-bottom: 2px solid var(--bg-deep);
  transform: rotate(40deg);
}

.page-faq .faq-check__item input:focus-visible ~ .faq-check__box {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-check__item input:checked ~ .faq-check__text {
  color: var(--muted);
}

.page-faq .faq-rail__text {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: #c2d1ca;
}

.page-faq .faq-rail__card .btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 42px;
  font-size: 14px;
  text-decoration: none;
}

.page-faq .faq-rail__note {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-faq .faq-step__body {
    padding-left: 54px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--nav-height) + 20px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-link,
  .page-faq .faq-step__chev,
  .page-faq .faq-check__meter span,
  .page-faq .faq-check__box {
    transition: none;
  }

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