.page-faq {
  --faq-gutter: clamp(18px, 4vw, 40px);
  background: var(--ink-900);
  color: var(--mist-100);
}

.page-faq .breadcrumbs {
  padding-top: clamp(20px, 3vw, 32px);
  font-size: 13px;
  color: var(--sage-400);
}

.page-faq .breadcrumbs a {
  color: var(--sage-400);
  text-decoration: none;
}

.page-faq .breadcrumbs a:hover {
  color: var(--lime-500);
}

.page-faq .breadcrumbs [aria-current="page"] {
  color: var(--mist-100);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(18px, 2.6vw, 32px) clamp(36px, 5vw, 64px);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 48px);
  align-items: center;
  padding: clamp(20px, 3.2vw, 44px);
  border: 1px solid var(--line-700);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(200, 255, 61, 0.08), transparent 58%),
    linear-gradient(160deg, var(--ink-800), var(--ink-900) 70%);
  box-shadow: var(--shadow-island);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5.2vw, 60px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--mist-100);
  margin: 14px 0 18px;
  max-width: 15ch;
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  color: var(--sage-400);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  margin: 0;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.6vw, 28px);
}

.page-faq .faq-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 40px);
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: clamp(16px, 2vw, 22px) 0 0;
  border-top: 1px solid var(--line-700);
}

.page-faq .faq-hero-facts li {
  display: grid;
  gap: 4px;
}

.page-faq .faq-hero-facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.2vw, 24px);
  color: var(--lime-500);
  letter-spacing: -0.01em;
}

.page-faq .faq-hero-facts li > span:last-child {
  font-size: 12.5px;
  color: var(--sage-400);
}

.page-faq .faq-hero-media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line-700);
}

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

/* ---------- 上手四步 ---------- */
.page-faq .faq-steps {
  padding-block: clamp(44px, 6vw, 84px);
  background: var(--ink-800);
  border-block: 1px solid var(--line-700);
}

.page-faq .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-faq .faq-steps h2,
.page-faq .faq-quick h2,
.page-faq .faq-contact h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--mist-100);
  margin: 10px 0 0;
}

.page-faq .steps-note {
  margin: 0;
  max-width: 28ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sage-400);
}

.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-700);
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-faq .step-item {
  background: var(--ink-900);
  padding: clamp(20px, 2.6vw, 30px);
  display: grid;
  align-content: start;
  gap: 10px;
}

.page-faq .step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime-500);
  letter-spacing: 0.08em;
}

.page-faq .step-item h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--mist-100);
  line-height: 1.4;
}

.page-faq .step-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sage-400);
}

/* ---------- 快速定位 ---------- */
.page-faq .faq-quick {
  padding-block: clamp(44px, 6vw, 84px);
}

.page-faq .faq-quick .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-quick-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 1.6vw, 18px);
}

.page-faq .quick-card {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: clamp(18px, 2.2vw, 24px);
  background: var(--ink-800);
  border: 1px solid var(--line-700);
  border-left: 3px solid var(--pitch-500);
  border-radius: var(--radius-sm);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .quick-card:hover {
  transform: translateY(-3px);
  border-left-color: var(--lime-500);
}

.page-faq .quick-q {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--mist-100);
}

.page-faq .quick-a {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sage-400);
}

.page-faq .quick-card .tag {
  justify-self: start;
  margin-top: 2px;
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  padding-block: clamp(44px, 6vw, 88px);
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900));
  border-top: 1px solid var(--line-700);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}

.page-faq .faq-toc {
  display: grid;
  align-content: start;
  gap: 12px;
}

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

.page-faq .chapter-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--sage-400);
  text-decoration: none;
  transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .chapter-link .toc-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--pitch-500);
}

.page-faq .chapter-link:hover {
  color: var(--mist-100);
  background: var(--ink-700);
}

.page-faq .chapter-link[data-active="true"] {
  color: var(--mist-100);
  background: var(--ink-700);
  border-left-color: var(--lime-500);
}

.page-faq .chapter-link[data-active="true"] .toc-num {
  color: var(--lime-500);
}

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

.page-faq .qa-chapter {
  padding-block: clamp(20px, 2.6vw, 32px);
  border-top: 1px solid var(--line-700);
  scroll-margin-top: 104px;
}

.page-faq .qa-chapter:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-faq .qa-chapter-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(10px, 1.6vw, 18px);
}

.page-faq .qa-chapter-head .chapter-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime-500);
  letter-spacing: -0.02em;
}

.page-faq .qa-chapter-head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--mist-100);
}

.page-faq .qa-item {
  border-bottom: 1px solid var(--line-700);
}

.page-faq .qa-item:last-of-type {
  border-bottom: 0;
}

.page-faq .qa-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--mist-100);
  transition: color 0.18s var(--ease);
}

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

.page-faq .qa-item summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--lime-500);
}

.page-faq .qa-item[open] summary {
  color: var(--lime-300);
}

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

.page-faq .qa-answer {
  max-width: 68ch;
  padding-bottom: 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sage-400);
}

.page-faq .qa-answer p {
  margin: 0 0 10px;
}

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

.page-faq .qa-answer a {
  color: var(--lime-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa-answer a:hover {
  color: var(--lime-500);
}

.page-faq .qa-steps {
  counter-reset: qa;
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .qa-steps li {
  counter-increment: qa;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .qa-steps li::before {
  content: counter(qa, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--lime-500);
  padding-top: 4px;
}

.page-faq .qa-figure {
  margin: clamp(18px, 2.4vw, 26px) 0 4px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line-700);
}

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

/* ---------- 联系块 ---------- */
.page-faq .faq-contact {
  padding-block: clamp(36px, 5vw, 72px) clamp(56px, 7vw, 100px);
}

.page-faq .contact-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  padding: clamp(24px, 3.4vw, 46px);
  border: 1px solid var(--line-700);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 80% at 12% 0%, rgba(255, 122, 61, 0.1), transparent 62%),
    linear-gradient(200deg, var(--ink-700), var(--ink-900) 78%);
}

.page-faq .contact-copy h2 {
  margin-top: 10px;
}

.page-faq .contact-copy p {
  margin: 14px 0 0;
  max-width: 44ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sage-400);
}

.page-faq .contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  align-content: start;
  gap: 1px;
  background: var(--line-700);
  border: 1px solid var(--line-700);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-faq .contact-list li {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--ink-900);
}

.page-faq .contact-key {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sage-400);
}

.page-faq .contact-value {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--mist-100);
  word-break: break-word;
}

.page-faq .contact-value.mono {
  font-family: var(--font-mono);
  color: var(--lime-300);
}

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

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

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 1.12fr 0.88fr;
  }

  .page-faq .contact-panel {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 226px minmax(0, 1fr);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
  }

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

@media (min-width: 1180px) {
  .page-faq .step-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .quick-card,
  .page-faq .chapter-link,
  .page-faq .qa-item summary {
    transition: none;
  }

  .page-faq .quick-card:hover {
    transform: none;
  }
}
<<<END>>>