.page-faq {
  --faq-num-w: 56px;
  --faq-gap: clamp(12px, 2vw, 20px);
  --faq-accent-w: 3px;
  color: var(--paper);
  background: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  background: var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 36px);
}

.page-faq .faq-hero-copy h1 {
  margin: 12px 0 0;
  font-size: clamp(1.9rem, 5.4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.page-faq .faq-lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 32em;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero-figure {
  margin: 0;
}

.page-faq .faq-media {
  position: relative;
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid var(--line);
  aspect-ratio: 2 / 1;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-media--sync {
  aspect-ratio: 3 / 2;
}

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

.page-faq .faq-hero-figure figcaption,
.page-faq .faq-sync-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 索引 ---------- */
.page-faq .faq-index {
  display: grid;
  gap: 1px;
  margin-top: clamp(30px, 5vw, 54px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-index a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ink-900);
  color: var(--paper);
  font-size: 0.95rem;
  line-height: 1.5;
  text-decoration: none;
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  background: var(--panel-700);
  color: var(--cyan);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-main {
  background: var(--ink-800);
  padding-top: clamp(36px, 6vw, 72px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-faq .faq-list-inner {
  position: relative;
}

.page-faq .faq-item {
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: var(--faq-num-w) minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--faq-gap);
  padding: clamp(18px, 2.6vw, 28px) 0;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary::after {
  content: "+";
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--orange);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq .faq-item:target > summary {
  background: linear-gradient(90deg, rgba(56, 225, 255, 0.12), rgba(56, 225, 255, 0) 70%);
}

.page-faq .faq-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  justify-self: center;
  width: 40px;
  height: 40px;
  background: var(--panel-700);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.page-faq .faq-item[open] .faq-num {
  background: var(--cyan);
  color: var(--ink-900);
}

.page-faq .faq-q {
  margin: 0;
  font-size: clamp(1.02rem, 2.1vw, 1.4rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--paper);
  transition: color 160ms var(--ease);
}

.page-faq .faq-item > summary:hover .faq-q {
  color: var(--cyan);
}

/* 展开内容 */
.page-faq .faq-body {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  padding: 0 0 clamp(24px, 3.4vw, 40px);
  animation: faq-fade 220ms var(--ease) both;
}

@keyframes faq-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

.page-faq .faq-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.14em;
}

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

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

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: faq-step;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 42px;
  counter-increment: faq-step;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--paper);
}

.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  padding: 3px 5px;
  border: 1px solid var(--line);
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .faq-note {
  margin: 0;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--panel-700);
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-sync-figure {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
}

.page-faq .faq-inline-link {
  margin: 14px 0 0;
  font-size: 0.92rem;
}

/* ---------- 联系出口 ---------- */
.page-faq .faq-exit {
  background: var(--void);
  border-top: 1px solid var(--line);
}

.page-faq .faq-exit-inner {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(22px, 3.4vw, 36px) clamp(18px, 3vw, 32px);
  background: var(--ink-900);
  border: 1px solid var(--line);
  border-left: var(--faq-accent-w) solid var(--orange);
}

.page-faq .faq-exit-copy h2 {
  margin: 10px 0 0;
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.015em;
  max-width: 22ch;
}

.page-faq .faq-exit-copy p {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 0.95rem;
  line-height: 1.76;
  color: var(--mist);
}

.page-faq .faq-exit-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  font-size: 0.92rem;
}

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-faq .faq-hero-figure {
    margin-top: clamp(20px, 4vw, 56px);
  }

  .page-faq .faq-list-inner::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(var(--faq-num-w) / 2);
    width: 1px;
    background: linear-gradient(180deg, var(--line), var(--line) 88%, rgba(36, 64, 90, 0));
    pointer-events: none;
  }

  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    padding-left: calc(var(--faq-num-w) + var(--faq-gap));
  }

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

  .page-faq .faq-exit-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-body {
    animation: none;
  }

  .page-faq .faq-index a,
  .page-faq .faq-num,
  .page-faq .faq-q {
    transition: none;
  }
}
<<<END>>>