.page-faq {
  background: var(--paper);
  color: var(--ink);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background: var(--ink-900);
  color: var(--on-dark-strong);
  padding: calc(var(--header-h) + 36px) 0 clamp(30px, 5vw, 52px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(41, 224, 194, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(41, 224, 194, 0.07) 1px, transparent 1px);
  background-size: 84px 84px;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 132px;
  right: -8%;
  width: 54%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan));
  transform: rotate(-4.5deg);
  opacity: 0.75;
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-crumb .crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  list-style: none;
  margin: 0 0 34px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-faq .faq-crumb .crumb-link {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-crumb .crumb-link:hover,
.page-faq .faq-crumb .crumb-link:focus-visible {
  color: var(--on-dark-strong);
  text-decoration: underline;
}

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

.page-faq .hero-grid {
  display: grid;
  gap: 22px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 16px;
  color: var(--cyan);
}

.page-faq h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(38px, 8vw, 76px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--on-dark-strong);
}

.page-faq .hero-lead {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--on-dark);
}

.page-faq .faq-hero-note {
  color: var(--on-dark);
  margin: 0;
}

/* ---------- 快捷入口 ---------- */
.page-faq .quick-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(30px, 5vw, 52px);
  background: rgba(41, 224, 194, 0.22);
  border-top: 1px solid rgba(41, 224, 194, 0.22);
}

.page-faq .quick-card {
  display: block;
  padding: 22px 20px 24px;
  background: var(--ink-800);
  color: var(--on-dark-strong);
  text-decoration: none;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .quick-card:hover,
.page-faq .quick-card:focus-visible {
  background: var(--ink-700);
}

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

.page-faq .q-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .quick-card h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--on-dark-strong);
}

.page-faq .quick-card p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-dark);
}

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

/* ---------- 步骤 ---------- */
.page-faq .faq-steps {
  padding: clamp(52px, 8vw, 104px) 0;
  background: var(--paper);
}

.page-faq .steps-head {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .section-num {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-faq .section-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.4vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-faq .steps-sub {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .step-wrap {
  display: grid;
  gap: 28px;
}

.page-faq .step-track {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .step {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.page-faq .step-n {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-faq .step-title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .step-note {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .step-warn {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--teal);
  border-left: 2px solid var(--cyan);
  padding-left: 8px;
}

.page-faq .step-fig {
  margin: 0;
}

.page-faq .step-fig .figure-media {
  background: var(--ink-800);
  border: 1px solid var(--line);
}

.page-faq .figure-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
  line-height: 1.6;
}

/* ---------- 问答主区 ---------- */
.page-faq .faq-body {
  padding: 0 0 clamp(52px, 8vw, 104px);
  background: var(--paper);
}

.page-faq .faq-layout {
  display: grid;
  gap: 26px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-side {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-faq .faq-side .annotation {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-faq .side-nav {
  display: grid;
  gap: 2px;
}

.page-faq .side-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 12px;
  min-height: 44px;
  border-left: 2px solid var(--line);
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .side-link:hover,
.page-faq .side-link:focus-visible {
  border-left-color: var(--cyan);
  background: var(--paper-white);
}

.page-faq .side-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.page-faq .side-note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .qa-group {
  margin-bottom: clamp(30px, 5vw, 52px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .qa-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}

.page-faq .group-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--teal);
  border: 1px solid var(--line);
  padding: 2px 7px;
}

.page-faq .group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.2vw, 28px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .group-sum {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .qa-groups > .qa-group:nth-child(1) .group-num { color: var(--teal); border-color: var(--teal); }
.page-faq .faq-groups > .qa-group:nth-child(2) .group-num { color: var(--orange); border-color: var(--orange); }
.page-faq .faq-groups > .qa-group:nth-child(3) .group-num { color: var(--teal); border-color: var(--line); }
.page-faq .faq-groups > .qa-group:nth-child(4) .group-num { color: var(--orange); border-color: var(--line); }
.page-faq .faq-groups > .qa-group:nth-child(5) .group-num { color: var(--teal); border-color: var(--teal); }

.page-faq .qa-group:target .qa-group-head {
  border-bottom-color: var(--cyan);
}

.page-faq .qa {
  background: var(--paper-white);
  border: 1px solid var(--line);
  margin-bottom: 10px;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--ink-700);
}

.page-faq .qa[open] {
  border-color: var(--ink-700);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 16px;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .qa summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--teal);
}

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

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

.page-faq .qa-body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line);
  margin-top: 2px;
  padding-top: 12px;
}

.page-faq .qa-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 术语表 ---------- */
.page-faq .glossary {
  background: var(--ink-800);
  color: var(--on-dark-strong);
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-faq .glossary .section-num {
  color: var(--cyan);
}

.page-faq .glossary .section-title {
  color: var(--on-dark-strong);
  margin-bottom: 0;
}

.page-faq .glossary-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .glossary-grid {
  display: grid;
  gap: 1px;
  margin: 0;
  background: rgba(41, 224, 194, 0.18);
  border: 1px solid rgba(41, 224, 194, 0.18);
}

.page-faq .gl-item {
  background: var(--ink-800);
  padding: 20px 18px;
}

.page-faq .gl-term {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--cyan);
  margin: 0 0 8px;
}

.page-faq .gl-def {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-dark);
}

/* ---------- 联系 ---------- */
.page-faq .faq-contact {
  padding: clamp(52px, 8vw, 100px) 0;
  background: var(--paper);
}

.page-faq .contact-grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-contact .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-faq .contact-lead {
  margin: 0 0 24px;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .contact-rows {
  border-top: 1px solid var(--line);
  margin-bottom: 26px;
}

.page-faq .contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .contact-label {
  flex: 0 0 84px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding-top: 3px;
}

.page-faq .contact-value {
  flex: 1 1 220px;
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .contact-tip {
  margin: 0;
  padding-left: 10px;
  border-left: 2px solid var(--cyan);
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .contact-fig {
  margin: 0;
}

.page-faq .contact-fig .figure-media {
  border: 1px solid var(--line);
  background: var(--ink-900);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-faq .quick-grid {
    grid-template-columns: 1.3fr 1fr 1fr;
  }

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

  .page-faq .contact-row {
    flex-wrap: nowrap;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-faq .hero-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 2fr);
    align-items: end;
    gap: 32px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 44px;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    align-self: start;
    border-top: 0;
    padding-top: 0;
  }

  .page-faq .step-wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 40px;
  }

  .page-faq .step-track {
    display: flex;
    overflow-x: auto;
    gap: 16px;
    padding-bottom: 10px;
  }

  .page-faq .step-track > .step {
    flex: 1 0 180px;
    min-width: 0;
  }

  .page-faq .contact-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 52px;
  }
}

@media (min-width: 1100px) {
  .page-faq .glossary-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-layout {
    grid-template-columns: 276px minmax(0, 1fr);
    gap: 64px;
  }

  .page-faq .step-track > .step {
    flex: 1 0 200px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .quick-card,
  .page-faq .side-link,
  .page-faq .qa {
    transition: none;
  }
}
<<<END>>>