/* 官网多页导航 + 演示页布局（与 index 主题一致） */
:root {
  --bg: #1a1515;
  --surface: #252020;
  --primary: #8b2942;
  --primary-dark: #5c1a2b;
  --accent: #c9a227;
  --text: #f5e6d3;
  --text-muted: #b8a898;
}
.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.35rem 0.5rem;
  padding: 0.65rem 0.75rem;
  margin: 0 -0.5rem 1rem;
  background: rgba(37, 32, 32, 0.95);
  border: 1px solid rgba(201, 162, 39, 0.28);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}
.main-nav a {
  color: var(--text-muted, #B8A898);
  text-decoration: none;
  font-size: 0.82rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  white-space: nowrap;
}
.main-nav a:hover {
  color: var(--accent, #C9A227);
  background: rgba(201, 162, 39, 0.1);
}
.main-nav a.nav-here {
  color: var(--accent, #C9A227);
  border: 1px solid rgba(201, 162, 39, 0.45);
  font-weight: 600;
}
.main-nav .nav-sep {
  color: rgba(201, 162, 39, 0.35);
  font-size: 0.7rem;
  user-select: none;
}
@media (max-width: 520px) {
  .main-nav {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
}
.page-simple {
  text-align: left;
  padding: 0.5rem 0 2rem;
}
.page-simple h2 {
  font-size: 1.15rem;
  color: var(--accent, #C9A227);
  margin-bottom: 0.75rem;
}
.page-simple p {
  color: var(--text-muted, #B8A898);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 1rem;
}
.page-simple .btn-chat {
  display: inline-block;
  margin-top: 0.25rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  padding: 0.65rem 1.25rem;
  background: linear-gradient(135deg, var(--primary, #8B2942), var(--primary-dark, #5C1A2B));
  color: var(--text, #F5E6D3) !important;
  border: 1px solid var(--accent, #C9A227);
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  font-family: inherit;
}
.page-simple .btn-chat.secondary {
  background: transparent;
  color: var(--accent, #C9A227) !important;
}
#app-loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: var(--bg, #1A1515);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  text-align: center;
}
#app-loading-overlay.show {
  display: flex;
}
#app-loading-overlay .spinner {
  width: 42px;
  height: 42px;
  border: 3px solid rgba(201, 162, 39, 0.2);
  border-top-color: var(--accent, #C9A227);
  border-radius: 50%;
  animation: yj-spin 0.85s linear infinite;
  margin-bottom: 1rem;
}
@keyframes yj-spin {
  to {
    transform: rotate(360deg);
  }
}
#app-loading-overlay .msg {
  font-size: 0.95rem;
  color: var(--text, #F5E6D3);
  max-width: 280px;
}
#app-loading-overlay .sub {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted, #B8A898);
  max-width: 280px;
}