.page-faq {
  --faq-rail-w: 244px;
  --faq-card: var(--surface);
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(96px, 13vw, 150px) var(--gutter) clamp(44px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 100% at 84% 0%, rgba(201, 255, 61, 0.12), rgba(201, 255, 61, 0) 58%),
    linear-gradient(180deg, #0A0D0C 0%, #101E19 100%);
}

.page-faq .hero-inner {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  max-width: 1200px;
  margin: 0 auto;
}

.page-faq .breadcrumb ol,
.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-faq .breadcrumb-list li {
  color: var(--steel-dim);
}

.page-faq .breadcrumb-list a {
  color: var(--steel);
  text-decoration: none;
}

.page-faq .breadcrumb-list a:hover {
  color: var(--lime);
}

.page-faq h1 {
  margin: 18px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(32px, 5.4vw, 58px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .hero-lead {
  max-width: 56ch;
  margin: 18px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 32px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--ink);
}

.page-faq .fact-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-faq .fact-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--steel-dim);
}

.page-faq .hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--surface);
}

.page-faq .hero-media::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 42px;
  background: linear-gradient(180deg, rgba(10, 13, 12, 0), rgba(10, 13, 12, 0.85));
  pointer-events: none;
}

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

/* ---------- 版式骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 40px);
  padding-top: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-rail-card {
  border: 1px solid var(--line);
  background: var(--faq-card);
  padding: 20px 18px;
}

.page-faq .faq-rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel-dim);
}

.page-faq .faq-rail-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail-list li + li {
  border-top: 1px solid var(--line);
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 0;
  font-size: 14px;
  color: var(--steel);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-faq .faq-rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--steel-dim);
  transition: color 0.18s ease;
}

.page-faq .faq-rail-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--lime);
  opacity: 0.35;
  transition: opacity 0.18s ease;
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--paper);
}

.page-faq .faq-rail-link:hover .faq-rail-num,
.page-faq .faq-rail-link:focus-visible .faq-rail-num {
  color: var(--lime);
}

.page-faq .faq-rail-link:hover .faq-rail-dot,
.page-faq .faq-rail-link:focus-visible .faq-rail-dot {
  opacity: 1;
}

.page-faq .faq-rail-cta {
  margin-top: 18px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding-bottom: clamp(34px, 5vw, 54px);
}

.page-faq .faq-section + .faq-section {
  padding-top: clamp(32px, 4vw, 48px);
  border-top: 1px solid var(--line);
}

.page-faq .sec-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.page-faq .sec-num {
  flex: 0 0 auto;
  padding: 7px 8px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .sec-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .sec-lead {
  max-width: 64ch;
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 三步流程 ---------- */
.page-faq .steps {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .steps > li {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: var(--ink);
}

.page-faq .step-num {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  color: var(--lime);
}

.page-faq .step-body h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .qa-group {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

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

.page-faq .qa > summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-faq .qa-q {
  flex: 1 1 auto;
  margin: 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--mist);
  transition: color 0.18s ease;
}

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

.page-faq .q-mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  margin-left: auto;
}

.page-faq .q-mark::before,
.page-faq .q-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--lime);
  transform-origin: center;
}

.page-faq .q-mark::after {
  transform: rotate(90deg);
  transition: transform 0.2s ease;
}

.page-faq .qa[open] .q-mark::after {
  transform: rotate(0deg);
}

.page-faq .qa-a {
  max-width: 66ch;
  padding: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .qa-a p {
  margin: 0 0 12px;
}

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

.page-faq .qa-a strong {
  font-weight: 600;
  color: var(--paper);
}

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

.page-faq .qa-steps li {
  display: flex;
  gap: 10px;
}

.page-faq .qa-steps .n {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
}

/* ---------- 资料区块图文 ---------- */
.page-faq .teams-grid {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}

.page-faq .teams-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--surface);
}

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

/* ---------- 联系信息 ---------- */
.page-faq .contact-grid {
  display: grid;
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .contact-item {
  padding: 16px 18px;
  background: var(--surface);
}

.page-faq .contact-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-dim);
}

.page-faq .contact-value {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  text-decoration: none;
  word-break: break-word;
  border-bottom: 1px solid transparent;
}

.page-faq a.contact-value:hover,
.page-faq a.contact-value:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .contact-value--text {
  font-family: var(--font-body);
  color: var(--mist);
}

/* ---------- 结尾指引 ---------- */
.page-faq .faq-outro {
  margin-top: clamp(36px, 5vw, 56px);
  padding: 24px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  background: var(--surface-2);
}

.page-faq .faq-outro h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-outro p {
  max-width: 62ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .outro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 16px;
}

.page-faq .inline-link {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 255, 61, 0.4);
  padding-bottom: 2px;
}

.page-faq .inline-link:hover,
.page-faq .inline-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-faq .hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-faq .teams-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
    gap: 56px;
  }

  .page-faq .faq-rail-card {
    position: sticky;
    top: 88px;
  }
}

@media (max-width: 479px) {
  .page-faq .sec-head {
    gap: 10px;
  }

  .page-faq .steps > li {
    padding: 16px;
    gap: 12px;
  }

  .page-faq .qa > summary {
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-q,
  .page-faq .faq-rail-link,
  .page-faq .faq-rail-num,
  .page-faq .faq-rail-dot,
  .page-faq .q-mark::after {
    transition: none;
  }
}