/* ============ 页面：问答中心 ============ */
.page-faq {
  --faq-red-tint: #fff5f6;
  --faq-border: #e6e6e6;
  --faq-body-text: #26282c;
  --faq-muted-text: #6b6e74;
  --faq-bg-panel: #ffffff;
}

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

.page-faq .faq-group[id],
.page-faq .faq-contact-card[id] {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.page-faq .faq-hero {
  background: var(--bg-dark);
  padding: 48px 0 56px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 55%;
  background: linear-gradient(160deg, rgba(213, 0, 50, 0.92), rgba(139, 0, 0, 0.88));
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
  opacity: 0.4;
}

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

.page-faq .faq-hero .breadcrumb-item,
.page-faq .faq-hero .breadcrumb-item a {
  color: rgba(255, 255, 255, 0.66);
}

.page-faq .faq-hero .breadcrumb-item[aria-current='page'] {
  color: var(--accent);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 32px;
  margin-top: 28px;
}

.page-faq .faq-hero-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-faq .faq-hero-kicker .text-mono {
  background: rgba(57, 255, 20, 0.1);
  border: 1px solid rgba(57, 255, 20, 0.35);
  padding: 4px 10px;
  font-size: 12px;
}

.page-faq .faq-hero h1 {
  font-size: 34px;
  line-height: 1.16;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin: 0 0 20px;
}

.page-faq .faq-hero h1 em {
  display: block;
  font-style: italic;
  font-weight: 800;
  color: var(--accent);
}

.page-faq .faq-hero-lead {
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
  line-height: 1.7;
  max-width: 46em;
  margin-bottom: 24px;
}

.page-faq .faq-hero-lead .text-mono,
.page-faq .faq-hero-card .text-mono,
.page-faq .faq-hero-note .text-mono {
  color: var(--accent);
  font-weight: 600;
}

.page-faq .faq-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .faq-hero-tags .tag {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.85);
}

.page-faq .faq-hero-tags .tag-accent {
  background: rgba(57, 255, 20, 0.12);
  border-color: rgba(57, 255, 20, 0.4);
  color: var(--accent);
}

.page-faq .faq-hero-tags .tag-gold {
  background: rgba(255, 215, 0, 0.12);
  border-color: rgba(255, 215, 0, 0.4);
  color: var(--gold);
}

.page-faq .faq-hero-note {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.page-faq .faq-hero-note a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-hero-aside {
  align-self: end;
}

.page-faq .faq-hero-card {
  background: rgba(0, 0, 0, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 22px;
}

.page-faq .faq-hero-card .tag-gold {
  background: rgba(255, 215, 0, 0.12);
  border-color: rgba(255, 215, 0, 0.4);
  color: var(--gold);
}

.page-faq .faq-hero-card-label {
  margin: 16px 0 4px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-faq .faq-hero-card-mail {
  display: block;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  word-break: break-all;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  padding-bottom: 12px;
}

.page-faq .faq-hero-card-mail:hover {
  color: var(--accent);
}

.page-faq .faq-hero-card-time {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
}

.page-faq .faq-content {
  background: var(--bg-light);
  padding: 56px 0;
}

.page-faq .faq-content-grid {
  display: grid;
  gap: 36px;
}

.page-faq .faq-sidebar-index {
  font-size: 56px;
  line-height: 1;
  color: var(--primary);
  margin: 0 0 10px;
}

.page-faq .faq-sidebar-slash {
  color: var(--text-secondary);
  font-size: 30px;
  margin-left: 6px;
}

.page-faq .faq-sidebar h2 {
  font-size: 26px;
  line-height: 1.2;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.page-faq .faq-sidebar-desc {
  color: var(--faq-muted-text);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.page-faq .faq-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-sidebar-list a {
  display: block;
  padding: 7px 14px;
  background: var(--faq-bg-panel);
  border: 1px solid #dddddd;
  color: var(--faq-body-text);
  font-size: 13px;
  font-weight: 600;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}

.page-faq .faq-sidebar-list a:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.page-faq .faq-sidebar-list a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page-faq .faq-main {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-faq .faq-group {
  background: var(--faq-bg-panel);
  border-top: 3px solid var(--primary);
  box-shadow: var(--shadow-sm);
  padding: 20px 16px 8px;
}

.page-faq .faq-group-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.page-faq .faq-group-num {
  background: var(--faq-red-tint);
  color: var(--primary);
  font-size: 14px;
  padding: 5px 10px;
  line-height: 1;
}

.page-faq .faq-group-header h3 {
  font-size: 18px;
  margin: 0;
  letter-spacing: -0.01em;
}

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

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
}

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

.page-faq .faq-item summary:hover .faq-item-q {
  color: var(--primary);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.page-faq .faq-item-num {
  color: var(--primary);
  font-size: 12px;
  min-width: 28px;
  font-weight: 600;
}

.page-faq .faq-item-q {
  flex: 1;
  color: var(--faq-body-text);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  transition: color 0.25s;
}

.page-faq .faq-item-toggle {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  position: relative;
}

.page-faq .faq-item-toggle::before,
.page-faq .faq-item-toggle::after {
  content: '';
  position: absolute;
  background: var(--primary);
  transition: transform 0.3s var(--ease);
}

.page-faq .faq-item-toggle::before {
  top: 50%;
  left: 3px;
  right: 3px;
  height: 2px;
  margin-top: -1px;
}

.page-faq .faq-item-toggle::after {
  left: 50%;
  top: 3px;
  bottom: 3px;
  width: 2px;
  margin-left: -1px;
}

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

.page-faq .faq-item-body {
  padding: 0 6px 18px 40px;
  color: var(--faq-muted-text);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .faq-item-body p {
  margin: 0;
  max-width: 58em;
}

.page-faq .faq-item-body .text-mono {
  color: var(--primary);
  font-weight: 600;
}

.page-faq .faq-item-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-guide {
  background: var(--surface-dark);
  padding: 56px 0 64px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-guide::before {
  content: '';
  position: absolute;
  left: -100px;
  bottom: -100px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(213, 0, 50, 0.4) 0%, transparent 70%);
  z-index: 0;
}

.page-faq .faq-guide > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-guide-index {
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-faq .faq-guide-header h2 {
  color: var(--text-primary);
  font-size: 30px;
  line-height: 1.2;
  margin: 8px 0 12px;
}

.page-faq .faq-guide-desc {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.page-faq .faq-guide-layout {
  display: grid;
  gap: 32px;
}

.page-faq .faq-guide-steps {
  display: grid;
  gap: 14px;
}

.page-faq .guide-step {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  padding: 22px 20px;
}

.page-faq .guide-step-num {
  color: var(--primary);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-faq .guide-step h3 {
  color: var(--text-primary);
  font-size: 17px;
  margin: 8px 0 14px;
}

.page-faq .guide-step ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-faq .guide-step li {
  position: relative;
  padding-left: 22px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 8px;
}

.page-faq .guide-step li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  top: 1px;
}

.page-faq .guide-step .text-mono {
  color: var(--accent);
  font-weight: 600;
}

.page-faq .faq-guide-figure {
  margin: 0;
  padding: 10px 10px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
}

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

.page-faq .faq-guide-figure figcaption {
  text-align: center;
  padding-top: 12px;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-faq .faq-guide-more {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  margin: 32px 0 0;
}

.page-faq .faq-guide-more a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-contact {
  background: var(--bg-dark);
  padding: 56px 0 64px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-contact-visual {
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 280px;
  height: 280px;
  opacity: 0.22;
  z-index: 0;
}

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

.page-faq .faq-contact > .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact-card {
  max-width: 620px;
  background: linear-gradient(135deg, #8B0000 0%, #D50032 100%);
  border: 1px solid rgba(255, 215, 0, 0.45);
  box-shadow: var(--shadow-md);
  padding: 28px 24px;
}

.page-faq .faq-contact-index {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.page-faq .faq-contact-card .text-mono {
  color: var(--gold);
  font-weight: 600;
}

.page-faq .faq-contact-card h2 {
  color: var(--text-primary);
  font-size: 28px;
  margin: 8px 0 12px;
}

.page-faq .faq-contact-desc {
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 22px;
}

.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.page-faq .faq-contact-link {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}

.page-faq .faq-contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(57, 255, 20, 0.06);
}

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

.page-faq .faq-contact-list li {
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding: 12px 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  line-height: 1.5;
}

.page-faq .faq-contact-list li > span {
  width: 76px;
  flex-shrink: 0;
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  padding-top: 1px;
}

.page-faq .faq-contact-list a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  word-break: break-all;
}

.page-faq .faq-contact-addr {
  flex: 1;
  min-width: 180px;
}

@media (min-width: 768px) {
  .page-faq .faq-hero h1 {
    font-size: 42px;
  }

  .page-faq .faq-content {
    padding: 72px 0;
  }

  .page-faq .faq-guide {
    padding: 72px 0;
  }

  .page-faq .faq-guide-steps {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-contact {
    padding: 72px 0;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 56px 0 72px;
  }

  .page-faq .faq-hero::before {
    opacity: 1;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: 1fr 320px;
    gap: 48px;
    align-items: end;
  }

  .page-faq .faq-hero h1 {
    font-size: 52px;
  }

  .page-faq .faq-content-grid {
    grid-template-columns: 260px 1fr;
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 24px);
  }

  .page-faq .faq-sidebar-list {
    flex-direction: column;
    gap: 0;
  }

  .page-faq .faq-sidebar-list a {
    background: transparent;
    border: 0;
    border-bottom: 1px solid #e4e4e4;
    padding: 10px 0;
  }

  .page-faq .faq-sidebar-list a:hover {
    padding-left: 8px;
  }

  .page-faq .faq-guide-layout {
    grid-template-columns: 1fr 260px;
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-guide-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }

  .page-faq .faq-contact-card {
    padding: 36px 32px;
  }

  .page-faq .faq-contact-visual {
    width: 360px;
    height: 360px;
  }
}