.page-faq {
  --faq-body-text: #c6dcd4;
  --faq-card-bg: var(--ink-700);
  --faq-flow-gap: clamp(20px, 3vw, 40px);
  background: var(--ink-900);
  color: var(--mist-100);
  overflow-x: clip;
}

.page-faq :focus-visible {
  outline: 2px solid var(--orange-500);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(78px, 12vw, 150px) 0 clamp(36px, 5vw, 60px);
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(22px, 3.4vw, 34px);
}

.page-faq .hero-frame {
  position: relative;
  border: 2px solid var(--line-mid);
  box-shadow: var(--shadow-hard);
  padding: clamp(26px, 4.2vw, 54px);
  background:
    radial-gradient(120% 90% at 92% 6%, rgba(79, 227, 193, 0.14), transparent 58%),
    linear-gradient(158deg, rgba(20, 83, 68, 0.72), rgba(6, 35, 28, 0.34) 72%);
  overflow: hidden;
}

.page-faq .hero-frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 12px;
  background-image: repeating-linear-gradient(90deg, var(--cyan-200) 0 1px, transparent 1px 32px);
  opacity: 0.42;
  pointer-events: none;
}

.page-faq .hero-frame::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -78px;
  width: 232px;
  height: 232px;
  border: 2px solid rgba(255, 138, 61, 0.5);
  border-radius: 50%;
  border-left-color: transparent;
  border-bottom-color: transparent;
  transform: rotate(-18deg);
  pointer-events: none;
}

.page-faq .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-faq .hero-copy .label {
  margin: 0;
  color: var(--orange-200);
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 5.1vw, 56px);
  line-height: 1.09;
  letter-spacing: -0.02em;
  color: var(--mist-100);
}

.page-faq .faq-hero .lede {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  max-width: 34em;
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  line-height: 1.78;
  color: var(--faq-body-text);
}

.page-faq .hero-media {
  margin: 0;
  aspect-ratio: 10 / 7;
  border: 1.5px solid var(--line-mid);
  box-shadow: var(--shadow-hard-sm);
}

.page-faq .topic-nav {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(28px, 4vw, 42px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .topic-chip {
  display: inline-flex;
  align-items: center;
  padding: 11px 18px;
  border: 1.5px solid rgba(79, 227, 193, 0.6);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--cyan-200);
  background: transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .topic-chip:hover,
.page-faq .topic-chip:focus-visible {
  background: var(--ink-500);
  border-color: var(--cyan-400);
  color: var(--mist-100);
  transform: translateY(-2px);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  padding: clamp(46px, 6.5vw, 92px) 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-head {
  margin-bottom: clamp(28px, 3.8vw, 46px);
  max-width: 52em;
}

.page-faq .faq-head .index-mark {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--orange-500);
}

.page-faq .faq-head .section-title {
  margin: 10px 0 0;
  font-weight: 900;
  font-size: clamp(22px, 3.1vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--mist-100);
}

.page-faq .faq-head p {
  margin: 12px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--slate-400);
}

/* ---------- 问答卡片 ---------- */
.page-faq .qa-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-faq .qa-grid--flow {
  margin-top: clamp(30px, 4vw, 46px);
}

.page-faq .qa-card {
  position: relative;
  background: var(--faq-card-bg);
  border: 1.5px solid var(--line-mid);
  box-shadow: var(--shadow-hard-sm);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa-card:hover,
.page-faq .qa-card:focus-within {
  border-color: var(--cyan-400);
}

.page-faq .qa-card[open] {
  border-color: var(--cyan-400);
  background: var(--ink-500);
}

.page-faq .qa-card > summary {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 30px 20px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.52;
  color: var(--mist-100);
}

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

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

.page-faq .qa-tag {
  position: absolute;
  top: -13px;
  left: 16px;
  z-index: 2;
  padding: 5px 9px 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-200);
  background: var(--ink-900);
  border: 1px solid var(--cyan-400);
}

.page-faq .qa-toggle {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  flex: none;
}

.page-faq .qa-toggle::before,
.page-faq .qa-toggle::after {
  content: "";
  position: absolute;
  background: var(--cyan-400);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .qa-toggle::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .qa-toggle::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .qa-card[open] .qa-toggle::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa-body {
  padding: 0 20px 22px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--faq-body-text);
  animation: faq-card-in 180ms var(--ease);
}

.page-faq .qa-body p {
  margin: 0;
}

.page-faq .qa-body a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 227, 193, 0.45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .qa-body a:hover {
  color: var(--cyan-200);
  border-bottom-color: var(--cyan-200);
}

@keyframes faq-card-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 纠错流程 ---------- */
.page-faq .fix-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-faq .fix-step {
  position: relative;
}

.page-faq .fix-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--orange-500);
  background: var(--ink-900);
  color: var(--orange-200);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  position: relative;
  z-index: 1;
}

.page-faq .fix-title {
  margin: 18px 0 0;
  font-size: 17px;
  font-weight: 900;
  line-height: 1.4;
  color: var(--mist-100);
}

.page-faq .fix-text {
  margin: 10px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-body-text);
}

.page-faq .fix-media {
  margin: clamp(32px, 4.5vw, 52px) 0 0;
  aspect-ratio: 2 / 1;
  border: 1.5px solid var(--line-mid);
  box-shadow: var(--shadow-hard-sm);
}

/* ---------- 结尾 ---------- */
.page-faq .faq-outro {
  padding: clamp(50px, 7vw, 100px) 0 clamp(60px, 8vw, 120px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .outro-panel {
  position: relative;
  display: grid;
  gap: 18px;
  max-width: 68em;
  padding: clamp(28px, 4vw, 52px);
  border: 2px solid var(--orange-500);
  box-shadow: var(--shadow-hard);
  background: linear-gradient(140deg, rgba(255, 138, 61, 0.14), rgba(6, 35, 28, 0.4) 72%);
}

.page-faq .outro-panel .label {
  margin: 0;
  color: var(--orange-200);
}

.page-faq .outro-panel h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--mist-100);
}

.page-faq .outro-text {
  margin: 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-body-text);
}

.page-faq .outro-panel .btn {
  justify-self: start;
  margin-top: 6px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 760px) {
  .page-faq .fix-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--faq-flow-gap);
  }

  .page-faq .fix-step::before {
    content: "";
    position: absolute;
    top: 18px;
    left: 0;
    right: calc(-1 * var(--faq-flow-gap));
    height: 1px;
    background: var(--line-mid);
  }

  .page-faq .fix-step:last-child::before {
    display: none;
  }
}

@media (min-width: 900px) {
  .page-faq .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

@media (min-width: 1120px) {
  .page-faq .qa-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .qa-card:nth-child(3n + 2) {
    margin-top: 22px;
  }

  .page-faq .qa-card:nth-child(3n) {
    margin-top: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}
<<<END>>>