.page-faq {
  --faq-gap: clamp(1rem, 2.2vw, 1.75rem);
  --faq-third: #35f2d0;
  display: block;
}

.page-faq .crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
  font-size: var(--fs-annot);
  color: var(--mist);
}

.page-faq .crumb-item + .crumb-item::before {
  content: "/";
  margin-right: 0.5rem;
  color: rgba(139, 163, 184, 0.6);
}

.page-faq .crumb-link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .crumb-link:hover,
.page-faq .crumb-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-strong);
}

.page-faq .crumb-current {
  color: var(--ice);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(2rem, 5vw, 3.5rem);
  background:
    repeating-linear-gradient(90deg, rgba(53, 242, 208, 0.05) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(53, 242, 208, 0.05) 0 1px, transparent 1px 72px),
    radial-gradient(120% 90% at 85% 0%, rgba(53, 242, 208, 0.16), transparent 62%),
    var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.page-faq .eyebrow {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ice);
  max-width: 20ch;
}

.page-faq .lead {
  margin: 0;
  max-width: 48ch;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(234, 246, 255, 0.82);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero-meta {
  margin: 1.1rem 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-annot);
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .faq-hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--ink-850);
  padding: 0.5rem;
  box-shadow: 0 0 0 1px rgba(6, 24, 38, 0.9), 0 18px 48px rgba(0, 0, 0, 0.45);
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-faq .faq-hero-media figcaption {
  position: absolute;
  right: -0.25rem;
  top: 1.25rem;
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  writing-mode: vertical-rl;
  background: rgba(6, 24, 38, 0.86);
  padding: 0.5rem 0.25rem;
}

/* ---------- 故障分类 ---------- */
.page-faq .faq-board {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
  background: linear-gradient(180deg, var(--ink-900), var(--ink-850));
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-board-head {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .section-title {
  margin: 0 0 0.6rem;
  font-size: var(--fs-h2);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .fault-grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr;
}

.page-faq .fault-tile {
  position: relative;
  display: grid;
  gap: 0.35rem;
  padding: 1.15rem 1.15rem 1.25rem;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-left: 3px solid var(--tone, var(--cyan));
  color: var(--ice);
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .fault-tile::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: var(--tone, var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s ease;
}

.page-faq .fault-tile:hover,
.page-faq .fault-tile:focus-visible {
  transform: translateY(-2px);
  background: var(--ink-700);
  border-color: var(--tone, var(--cyan));
}

.page-faq .fault-tile:hover::after,
.page-faq .fault-tile:focus-visible::after {
  transform: scaleX(1);
}

.page-faq .fault-tile--screen { --tone: var(--orange); }
.page-faq .fault-tile--data { --tone: var(--cyan); }
.page-faq .fault-tile--video { --tone: var(--amber); }
.page-faq .fault-tile--member { --tone: var(--grass); }

.page-faq .fault-tile-index {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  line-height: 1;
  font-weight: 700;
  color: var(--tone, var(--cyan));
  opacity: 0.9;
}

.page-faq .fault-tile .tag {
  justify-self: start;
}

.page-faq .fault-tile-title {
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .fault-tile-text {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .fault-tile-go {
  margin-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.1em;
  color: var(--tone, var(--cyan));
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(3rem, 6vw, 5rem);
}

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

.page-faq .aside-card {
  border: 1px solid var(--line);
  background: var(--ink-850);
  padding: 1.1rem;
}

.page-faq .aside-card--third {
  border-color: var(--line-strong);
  background: linear-gradient(160deg, rgba(53, 242, 208, 0.12), rgba(11, 34, 56, 0.95) 55%);
  box-shadow: inset 0 0 0 1px rgba(53, 242, 208, 0.14);
}

.page-faq .aside-flag {
  margin: 0 0 0.5rem;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.14em;
  color: var(--on-accent);
  background: var(--cyan);
  padding: 0.15rem 0.45rem;
}

.page-faq .aside-title {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ice);
}

.page-faq .aside-text {
  margin: 0 0 0.9rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(234, 246, 255, 0.78);
}

.page-faq .chapter-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
  counter-reset: chap;
}

.page-faq .chapter-list li {
  counter-increment: chap;
}

.page-faq .chapter-link {
  display: block;
  padding: 0.5rem 0.6rem 0.5rem 2.15rem;
  position: relative;
  font-size: 0.9rem;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.page-faq .chapter-link::before {
  content: counter(chap, decimal-leading-zero);
  position: absolute;
  left: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-700);
  color: rgba(139, 163, 184, 0.7);
}

.page-faq .chapter-link:hover,
.page-faq .chapter-link:focus-visible {
  color: var(--ice);
  background: rgba(53, 242, 208, 0.08);
}

.page-faq .chapter-link.is-active,
.page-faq .chapter-link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(53, 242, 208, 0.1);
}

.page-faq .faq-aside .btn--sm {
  width: 100%;
  text-align: center;
}

.page-faq .copy-btn {
  margin-top: 0.6rem;
  width: 100%;
  padding: 0.45rem 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.08em;
  color: var(--cyan);
  background: transparent;
  border: 1px dashed rgba(53, 242, 208, 0.5);
  cursor: pointer;
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  background: rgba(53, 242, 208, 0.12);
}

.page-faq .copy-status {
  display: block;
  min-height: 1rem;
  margin-top: 0.4rem;
  font-size: 0.72rem;
  color: var(--grass);
}

/* ---------- 章节 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: clamp(2rem, 5vw, 3.25rem);
  min-width: 0;
}

.page-faq .faq-section {
  padding-top: 0.25rem;
  border-top: 1px solid var(--line);
  scroll-margin-top: 6rem;
}

.page-faq .faq-section .section-head {
  margin-bottom: 1.25rem;
}

.page-faq .faq-section .lead {
  max-width: 56ch;
}

.page-faq .faq-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  counter-reset: none;
}

.page-faq .flow-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  padding: 0.95rem 1rem;
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-left: 2px solid var(--ink-700);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .flow-step:hover {
  border-left-color: var(--cyan);
  background: var(--ink-800);
}

.page-faq .flow-num {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--amber);
  letter-spacing: 0.04em;
}

.page-faq .flow-body {
  min-width: 0;
}

.page-faq .flow-title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ice);
}

.page-faq .flow-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: rgba(234, 246, 255, 0.76);
}

.page-faq .faq-note {
  margin: 1.1rem 0 0;
  padding: 0.8rem 1rem;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mist);
  background: rgba(18, 52, 74, 0.5);
  border-left: 2px solid var(--orange);
}

.page-faq .faq-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

/* ---------- 第三项 ---------- */
.page-faq .faq-section--third {
  border-top: 2px solid var(--cyan);
  background: linear-gradient(180deg, rgba(53, 242, 208, 0.07), transparent 38%);
  padding-bottom: 0.5rem;
}

.page-faq .third-grid {
  display: grid;
  gap: 1.25rem;
}

.page-faq .third-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--ink-800);
  padding: 0.4rem;
}

.page-faq .third-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .third-figure figcaption {
  padding: 0.55rem 0.4rem 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-flow--compact .flow-step {
  border-left-color: rgba(53, 242, 208, 0.45);
}

/* ---------- 卡片组 ---------- */
.page-faq .faq-card-grid {
  gap: 0.85rem;
}

.page-faq .faq-card {
  padding: 1rem;
  background: var(--ink-850);
  border: 1px solid var(--line);
}

.page-faq .faq-card .tag {
  display: inline-block;
  margin-bottom: 0.55rem;
}

.page-faq .faq-card .card-title {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ice);
}

.page-faq .faq-card .card-meta {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-card .card-meta a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

/* ---------- 折叠清单 ---------- */
.page-faq .faq-accordion {
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-qa {
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-qa[open] {
  background: var(--ink-800);
  border-color: var(--line-strong);
}

.page-faq .faq-qa-q {
  position: relative;
  padding: 0.9rem 2.4rem 0.9rem 1rem;
  font-size: 0.96rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ice);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-qa-q::after {
  content: "+";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--cyan);
}

.page-faq .faq-qa[open] .faq-qa-q::after {
  content: "−";
}

.page-faq .faq-qa-q:hover,
.page-faq .faq-qa-q:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-qa-a {
  padding: 0 1rem 1rem;
  color: rgba(234, 246, 255, 0.78);
  font-size: 0.92rem;
  line-height: 1.75;
}

.page-faq .faq-qa-a p {
  margin: 0 0 0.6rem;
}

.page-faq .faq-qa-a p:last-child {
  margin-bottom: 0;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  background:
    repeating-linear-gradient(135deg, rgba(53, 242, 208, 0.06) 0 2px, transparent 2px 14px),
    var(--ink-800);
  border: 1px solid var(--line-strong);
}

.page-faq .faq-cta-title {
  margin: 0 0 0.35rem;
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--ice);
}

.page-faq .faq-cta-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 34rem) {
  .page-faq .fault-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-hero-actions .btn {
    min-width: 12rem;
    text-align: center;
  }
}

@media (min-width: 48rem) {
  .page-faq .faq-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 64rem) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-faq .fault-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-shell {
    grid-template-columns: 17rem minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--console-h) + var(--bar-h) + 1.25rem);
  }

  .page-faq .third-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (max-width: 63.99rem) {
  .page-faq .chapter-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fault-tile,
  .page-faq .flow-step,
  .page-faq .chapter-link,
  .page-faq .fault-tile::after {
    transition: none;
  }

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