/* ==================== 页面基底 ==================== */
.page-faq {
  background: var(--night-black);
  color: var(--text-light);
  overflow-x: clip;
}

/* ==================== 英雄区 ==================== */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 1.5rem 0 3rem;
  background: linear-gradient(150deg, var(--pitch-deep) 0%, var(--night-black) 72%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 84% 16%, rgba(20, 104, 75, 0.6), transparent 55%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: -8%;
  bottom: -14px;
  width: 60%;
  height: 16px;
  background: var(--victory-gold);
  clip-path: polygon(0 0, 100% 0, calc(100% - 24px) 100%, 24px 100%);
  opacity: 0.9;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 1.5rem;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 2rem;
}

.page-faq .faq-hero-copy .section-eyebrow {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: rgba(211, 175, 78, 0.14);
  border-left: 3px solid var(--victory-gold);
  font-family: var(--font-data);
  letter-spacing: 0.18em;
}

.page-faq .faq-hero h1 {
  margin: 1rem 0 0.75rem;
  font-size: clamp(1.9rem, 5vw, 3.2rem);
}

.page-faq .faq-hero-lead {
  max-width: 720px;
  margin: 0;
  color: var(--text-muted);
  font-size: 1rem;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero-stats {
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-hero-stats .stat-card {
  position: relative;
  background: rgba(10, 14, 18, 0.72);
  border: 1px solid rgba(211, 175, 78, 0.16);
  border-left: 4px solid var(--victory-gold);
  padding: 0.9rem 1.1rem;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 50%, calc(100% - 16px) 100%, 0 100%);
}

.page-faq .faq-hero-stats .stat-value {
  display: block;
  font-family: var(--font-data);
  font-size: 1.6rem;
  line-height: 1.1;
  color: var(--gold-light);
}

.page-faq .faq-hero-stats .stat-label {
  display: block;
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 0.2rem;
}

.page-faq .faq-hero-rotated {
  display: none;
}

/* ==================== 常见问题 ==================== */
.page-faq .faq-section {
  padding: 3rem 0 3.5rem;
  background: var(--night-black);
}

.page-faq .faq-layout {
  margin-top: 2rem;
  display: grid;
  gap: 1.5rem;
}

.page-faq .faq-index {
  background: rgba(11, 61, 46, 0.6);
  border: 1px solid rgba(139, 163, 155, 0.18);
  border-left: 4px solid var(--victory-gold);
  align-self: start;
}

.page-faq .faq-index ul {
  list-style: none;
  margin: 0;
  padding: 0.85rem;
  display: grid;
  gap: 0.25rem;
}

.page-faq .faq-index-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.6rem 0.75rem;
  color: var(--text-light);
  text-decoration: none;
  font-weight: 600;
  border-radius: 3px;
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}

.page-faq .faq-index-item::before {
  content: "▸";
  color: var(--victory-gold);
  margin-right: 0.5rem;
  transition: transform 0.25s var(--ease-out);
}

.page-faq .faq-index-item:hover,
.page-faq .faq-index-item:focus-visible {
  color: var(--gold-light);
  background: rgba(211, 175, 78, 0.1);
  transform: translateX(4px);
}

.page-faq .faq-index-item:hover::before,
.page-faq .faq-index-item:focus-visible::before {
  transform: rotate(90deg);
}

.page-faq .faq-index-name {
  flex: 1;
}

.page-faq .faq-index-count {
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(10, 14, 18, 0.55);
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
}

.page-faq .faq-groups {
  display: grid;
  gap: 1.5rem;
  align-content: start;
  min-width: 0;
}

.page-faq .faq-group {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(139, 163, 155, 0.18);
  border-top: 4px solid var(--victory-gold);
  scroll-margin-top: calc(var(--header-height) + 30px);
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.page-faq .faq-group:target {
  border-color: var(--gold-light);
  box-shadow: 0 10px 32px rgba(211, 175, 78, 0.12);
}

.page-faq .faq-group-heading {
  margin: 0;
  padding: 0.85rem 1.15rem;
  background: rgba(20, 104, 75, 0.3);
  border-bottom: 1px solid rgba(139, 163, 155, 0.12);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.page-faq .faq-item {
  border-bottom: 1px solid rgba(139, 163, 155, 0.14);
}

.page-faq .faq-item:last-child {
  border-bottom: none;
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  display: block;
  padding: 1rem 3.25rem 1rem 3.25rem;
  color: var(--text-light);
  font-weight: 600;
  background: rgba(0, 0, 0, 0.18);
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  background: rgba(20, 104, 75, 0.16);
  color: var(--gold-light);
}

.page-faq .faq-item summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--data-blue);
  opacity: 0.45;
}

.page-faq .faq-item[open] summary::before {
  background: var(--victory-gold);
  opacity: 1;
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-data);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--victory-gold);
}

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

.page-faq .faq-item p {
  margin: 0;
  padding: 0.85rem 1.25rem 1.25rem 3.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.page-faq .faq-item[open] p {
  animation: page-faq-fade 0.3s var(--ease-out);
}

@keyframes page-faq-fade {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-mobile-visual {
  margin: 0.9rem 1.25rem 1.25rem 3.5rem;
  display: grid;
  gap: 0.75rem;
  justify-items: start;
}

.page-faq .faq-mobile-frame {
  max-width: 220px;
  border: 2px solid rgba(211, 175, 78, 0.3);
  border-radius: 14px;
  overflow: hidden;
  background: var(--night-black);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.4);
}

.page-faq .faq-mobile-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-mobile-badge {
  margin-top: 0.5rem;
}

.page-faq .faq-mobile-note {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0;
}

/* ==================== 使用指南 ==================== */
.page-faq .guide-section {
  padding: 3.5rem 0;
  background: linear-gradient(165deg, var(--night-black) 0%, var(--pitch-deep) 100%);
}

.page-faq .guide-layout {
  margin-top: 2rem;
  display: grid;
  gap: 1.75rem;
}

.page-faq .guide-steps {
  display: grid;
  gap: 1.25rem;
}

.page-faq .guide-step {
  position: relative;
  background: rgba(10, 14, 18, 0.72);
  border: 1px solid rgba(211, 175, 78, 0.16);
  padding: 1.5rem;
  overflow: hidden;
}

.page-faq .guide-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--victory-gold) 0%, var(--gold-light) 100%);
}

.page-faq .guide-number {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 2rem;
  line-height: 1;
  color: var(--victory-gold);
  margin-bottom: 0.7rem;
}

.page-faq .guide-step h3 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
}

.page-faq .guide-step ol {
  margin: 0;
  padding-left: 1.3rem;
  display: grid;
  gap: 0.5rem;
}

.page-faq .guide-step li {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.page-faq .guide-device {
  display: grid;
  justify-items: center;
  gap: 0.8rem;
  align-content: start;
}

.page-faq .guide-device-frame {
  max-width: 300px;
  border-radius: 20px;
  border: 2px solid rgba(211, 175, 78, 0.32);
  overflow: hidden;
  background: var(--night-black);
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.4);
}

.page-faq .guide-device-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .guide-device-note {
  max-width: 300px;
  margin: 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

/* ==================== 联系支持 ==================== */
.page-faq .contact-section {
  padding: 3.5rem 0;
  background: linear-gradient(180deg, var(--pitch-deep) 0%, var(--night-black) 100%);
}

.page-faq .contact-panel {
  display: grid;
  gap: 1rem;
  background: rgba(10, 14, 18, 0.78);
  border: 1px solid rgba(211, 175, 78, 0.2);
  overflow: hidden;
}

.page-faq .contact-media {
  min-height: 260px;
  background: var(--pitch-mid);
}

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

.page-faq .contact-body {
  padding: 1.5rem;
}

.page-faq .contact-body h2 {
  margin: 0.5rem 0 0.9rem;
  font-size: 1.8rem;
}

.page-faq .contact-body > p {
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.page-faq .contact-list {
  margin: 1.2rem 0 0;
  display: grid;
  gap: 0.7rem;
}

.page-faq .contact-item {
  display: grid;
  gap: 0.15rem;
  padding: 0.7rem 0.9rem;
  background: rgba(255, 255, 255, 0.045);
  border-left: 3px solid var(--victory-gold);
}

.page-faq .contact-item dt {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-faq .contact-item dd {
  margin: 0;
  color: var(--text-light);
  font-weight: 700;
  font-size: 1.02rem;
  word-break: break-all;
}

.page-faq .contact-note {
  margin: 1rem 0 0;
  padding: 0.8rem 1rem;
  background: rgba(74, 144, 166, 0.1);
  border-left: 3px solid var(--data-blue);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.page-faq .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

/* ==================== 响应式 ==================== */
@media (min-width: 640px) {
  .page-faq .faq-hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .contact-panel {
    grid-template-columns: 260px 1fr;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 4rem 0 5rem;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 3rem;
    align-items: end;
  }

  .page-faq .faq-hero-stats {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-hero-stats .stat-card {
    display: flex;
    align-items: baseline;
    gap: 0.8rem;
  }

  .page-faq .faq-hero-stats .stat-label {
    margin: 0;
  }

  .page-faq .faq-hero-rotated {
    display: block;
    position: absolute;
    left: -1.2rem;
    top: 120px;
    writing-mode: vertical-rl;
    font-family: var(--font-data);
    font-size: 0.65rem;
    letter-spacing: 0.35em;
    color: var(--text-muted);
    text-transform: uppercase;
  }

  .page-faq .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-height) + 20px);
  }

  .page-faq .guide-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2rem;
    align-items: start;
  }

  .page-faq .guide-steps {
    gap: 1.5rem;
  }

  .page-faq .contact-panel {
    grid-template-columns: 360px 1fr;
  }

  .page-faq .contact-body {
    padding: 2rem 2.2rem;
  }
}