.page-faq {
  --faq-panel: rgba(7, 39, 30, .74);
  --faq-panel-solid: #0C3B2E;
  --faq-hairline: rgba(44, 113, 96, .55);
  --faq-glow: rgba(69, 244, 208, .16);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 6vw, 3rem) 0 clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--faq-hairline);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 65%;
  opacity: .26;
  filter: saturate(.85);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(70% 60% at 18% 10%, rgba(69, 244, 208, .18), transparent 70%),
    linear-gradient(180deg, rgba(4, 26, 20, .55) 0%, rgba(4, 26, 20, .92) 72%, var(--ink-950) 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: var(--step-h1);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--mist);
  max-width: 22ch;
  margin: .9rem 0 0;
}

.page-faq .faq-hero__lead {
  max-width: 62ch;
  margin: 1.1rem 0 0;
  color: var(--mist);
  opacity: .84;
  font-size: var(--step-body);
  line-height: 1.75;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.5rem;
}

.page-faq .faq-index {
  display: flex;
  gap: .5rem;
  margin-top: 1.9rem;
  padding-bottom: .35rem;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .5rem .85rem;
  border: 1px solid var(--faq-hairline);
  border-radius: var(--radius-pill);
  background: rgba(18, 96, 78, .28);
  color: var(--mist);
  font-size: var(--step-caption);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--border-neon);
  background: rgba(69, 244, 208, .14);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  color: var(--neon);
  font-size: .72rem;
  letter-spacing: .06em;
}

/* 通用文本 */
.page-faq .section h2 {
  font-family: var(--font-display);
  font-size: var(--step-h2);
  line-height: 1.14;
  color: var(--mist);
  margin: .5rem 0 0;
}

.page-faq .section h3 {
  font-size: var(--step-h3);
  color: var(--mist);
  margin: 0 0 .5rem;
  line-height: 1.35;
}

.page-faq .section p {
  color: var(--mist);
  opacity: .82;
  line-height: 1.78;
}

.page-faq .faq-aside-text {
  font-size: var(--step-caption);
  max-width: 34ch;
  border-left: 2px solid var(--border-neon);
  padding-left: .85rem;
  margin: .8rem 0 0;
}

.page-faq .faq-early {
  margin: .9rem 0 1.4rem;
  max-width: 62ch;
}

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

/* 诊断台 */
.page-faq .faq-diag {
  display: grid;
  gap: 1rem;
  margin-top: 1.6rem;
}

.page-faq .faq-step-stack {
  display: grid;
  gap: 1rem;
}

.page-faq .faq-step {
  padding: 1.25rem 1.15rem;
  border-radius: var(--radius-md);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 6vw, 2.6rem);
  line-height: 1;
  color: var(--neon);
  margin: 0 0 .6rem;
  letter-spacing: -.02em;
}

.page-faq .faq-step__text {
  margin: 0 0 .85rem;
  font-size: .95rem;
}

.page-faq .faq-step__result {
  margin: .95rem 0 0;
  padding-top: .8rem;
  border-top: 1px dashed var(--faq-hairline);
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--amber);
  opacity: 1;
}

.page-faq .faq-check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}

.page-faq .faq-check-list li {
  position: relative;
  padding-left: 1.65rem;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--mist);
  opacity: .86;
}

.page-faq .faq-check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .38em;
  width: .8rem;
  height: .8rem;
  border-radius: 3px;
  border: 1px solid var(--teal);
  background: linear-gradient(140deg, rgba(69, 244, 208, .3), rgba(69, 244, 208, .04));
}

/* 侧栏 */
.page-faq .faq-side {
  display: grid;
  gap: .8rem;
  align-content: start;
}

.page-faq .faq-side .media-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--faq-hairline);
}

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

.page-faq .faq-side .media-frame__caption {
  font-family: var(--font-mono);
  font-size: .72rem;
  line-height: 1.6;
  color: var(--mist);
  opacity: .6;
  padding: .55rem .75rem .7rem;
  margin: 0;
  background: rgba(4, 26, 20, .6);
}

.page-faq .faq-more {
  border: 1px solid var(--faq-hairline);
  border-radius: var(--radius-md);
  background: var(--faq-panel);
  padding: .8rem .9rem;
}

.page-faq .faq-more summary {
  cursor: pointer;
  font-size: .9rem;
  font-weight: 600;
  color: var(--mist);
  list-style: none;
  display: flex;
  gap: .5rem;
  align-items: flex-start;
}

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

.page-faq .faq-more summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--neon);
  line-height: 1.2;
}

.page-faq .faq-more[open] summary::before {
  content: "–";
}

.page-faq .faq-more p {
  margin: .6rem 0 0;
  font-size: .85rem;
  line-height: 1.72;
  opacity: .78;
}

/* 色带章节 */
.page-faq .faq-band {
  background: linear-gradient(180deg, rgba(12, 59, 46, .55), rgba(7, 39, 30, .3));
  border-top: 1px solid var(--faq-hairline);
  border-bottom: 1px solid var(--faq-hairline);
}

/* 浏览器兼容分栏 */
.page-faq .faq-split {
  display: grid;
  gap: 1.5rem;
  margin-top: .6rem;
}

.page-faq .faq-split__main p + p {
  margin-top: .85rem;
}

.page-faq .faq-callout {
  margin-top: 1.4rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--ember);
}

.page-faq .faq-callout p:last-child {
  margin: .35rem 0 0;
  font-size: .9rem;
  opacity: .9;
}

.page-faq .faq-panel-solid {
  background: var(--faq-panel-solid);
  border: 1px solid var(--faq-hairline);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.1rem;
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-numbered {
  list-style: none;
  counter-reset: faqstep;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .7rem;
}

.page-faq .faq-numbered li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 2rem;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--mist);
  opacity: .86;
}

.page-faq .faq-numbered li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .12em;
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--amber);
  border: 1px solid var(--faq-hairline);
  border-radius: 5px;
  padding: .12rem .3rem;
}

.page-faq .faq-panel-solid__note {
  margin: 1rem 0 1.1rem;
  font-size: .8rem;
  line-height: 1.7;
  opacity: .7;
}

/* 换机 */
.page-faq .faq-device {
  display: grid;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.page-faq .faq-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .9rem;
  position: relative;
}

.page-faq .faq-flow__item {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: .85rem;
  padding: .9rem 0;
  border-bottom: 1px solid var(--faq-hairline);
}

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

.page-faq .faq-flow__num {
  font-family: var(--font-mono);
  font-size: .95rem;
  color: var(--ink-950);
  background: var(--neon);
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.page-faq .faq-flow__item p {
  margin: 0;
  font-size: .92rem;
}

.page-faq .faq-device__note {
  border-radius: var(--radius-md);
  padding: 1.1rem;
  border: 1px solid var(--faq-hairline);
}

.page-faq .faq-device__note p {
  font-size: .9rem;
}

.page-faq .faq-device__note .btn {
  margin-top: .9rem;
}

/* 标签页区 */
.page-faq .faq-tabs {
  margin-top: .3rem;
}

.page-faq .faq-tabs .tablist {
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--faq-hairline);
}

.page-faq .faq-tabs .tab {
  flex: 0 0 auto;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  color: var(--mist);
  opacity: .7;
  font-family: var(--font-body);
  font-size: .88rem;
  padding: .5rem .95rem;
  cursor: pointer;
  transition: opacity var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-tabs .tab[aria-selected="true"] {
  opacity: 1;
  border-color: var(--border-neon);
  background: rgba(69, 244, 208, .14);
  color: var(--neon);
}

.page-faq .faq-tabs .tab-panel {
  padding: 1.2rem 0 0;
}

.page-faq .faq-tabs .tab-panel h3 {
  margin-bottom: .6rem;
}

.page-faq .faq-tabs .tab-panel p {
  font-size: .93rem;
  margin: 0 0 .9rem;
}

/* 联系准备 */
.page-faq .faq-contact {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-faq .faq-contact__check {
  border-radius: var(--radius-md);
  padding: 1.2rem 1.1rem;
}

.page-faq .faq-contact__info {
  border-radius: var(--radius-md);
  padding: 1.2rem 1.1rem;
  background: var(--ink-900);
  border: 1px solid var(--faq-hairline);
}

.page-faq .faq-contact__list {
  margin: 0;
  display: grid;
  gap: .7rem;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: .1rem;
  padding-bottom: .6rem;
  border-bottom: 1px dashed rgba(44, 113, 96, .4);
}

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

.page-faq .faq-contact__row dt {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--teal);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: .92rem;
  line-height: 1.65;
  color: var(--mist);
  word-break: break-word;
}

.page-faq .faq-contact__row dd a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(69, 244, 208, .35);
}

.page-faq .faq-contact__note {
  margin: .95rem 0 0;
  font-size: .78rem;
  line-height: 1.7;
  opacity: .68;
}

/* 继续了解 */
.page-faq .faq-next {
  padding-bottom: clamp(2.5rem, 7vw, 4rem);
}

.page-faq .faq-next__grid {
  display: grid;
  gap: .8rem;
}

.page-faq .faq-next__card {
  display: block;
  padding: 1.1rem 1.05rem;
  border: 1px solid var(--faq-hairline);
  border-radius: var(--radius-md);
  background: var(--faq-panel);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-next__card:hover,
.page-faq .faq-next__card:focus-visible {
  border-color: var(--border-neon);
  transform: translateY(-2px);
}

.page-faq .faq-next__card h3 {
  margin: .35rem 0 .3rem;
}

.page-faq .faq-next__card p {
  margin: 0;
  font-size: .85rem;
  opacity: .72;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-faq .faq-step {
    padding: 1.5rem 1.4rem;
  }

  .page-faq .faq-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-diag {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .86fr);
    gap: 1.4rem;
    align-items: start;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .9fr);
    gap: 2rem;
    align-items: start;
  }

  .page-faq .faq-device {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .75fr);
    gap: 1.8rem;
    align-items: start;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1.4rem;
  }

  .page-faq .faq-index {
    overflow-x: visible;
    flex-wrap: wrap;
  }

  .page-faq .faq-tabs .tablist {
    overflow-x: visible;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero h1 {
    max-width: 24ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-next__card,
  .page-faq .faq-index__link,
  .page-faq .faq-tabs .tab {
    transition: none;
  }

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