/* roulang page: index */
:root {
      --bg-deep: #0A0E17;
      --bg-panel: #1A1F2E;
      --gold: #C8A951;
      --energy-purple: #A855F7;
      --text-primary: #F1F5F9;
      --text-secondary: #94A3B8;
      --text-muted: #64748B;
      --success: #10B981;
      --warning: #F59E0B;
      --glass-border: rgba(200,169,81,0.15);
      --glass-bg: rgba(26,31,46,0.6);
      --radius-card: 1.5rem;
      --radius-btn: 9999px;
      --shadow-glow: 0 0 30px rgba(168,85,247,0.15);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-primary);
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.05);
      border-radius: var(--radius-card);
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    }
    .glass-card:hover {
      border-color: rgba(200,169,81,0.3);
      box-shadow: var(--shadow-glow), 0 20px 40px rgba(0,0,0,0.5);
      transform: translateY(-4px);
      transition: all 0.3s ease;
    }
    .gold-gradient-text {
      background: linear-gradient(135deg, #C8A951 0%, #F5D77A 50%, #A855F7 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .btn-primary {
      background: linear-gradient(135deg, #C8A951, #A855F7);
      color: #0A0E17;
      font-weight: 700;
      border-radius: 9999px;
      padding: 0.875rem 2.5rem;
      box-shadow: 0 8px 20px rgba(168,85,247,0.3);
      transition: all 0.2s ease;
      border: none;
      cursor: pointer;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      box-shadow: 0 0 40px rgba(168,85,247,0.6);
      transform: scale(1.02);
    }
    .btn-outline-gold {
      border: 2px solid #C8A951;
      color: #C8A951;
      font-weight: 600;
      border-radius: 9999px;
      padding: 0.75rem 2.2rem;
      background: transparent;
      transition: all 0.2s;
      cursor: pointer;
      display: inline-block;
      text-align: center;
    }
    .btn-outline-gold:hover {
      background: rgba(200,169,81,0.1);
      border-color: #A855F7;
      color: #A855F7;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 2.5rem;
    }
    .section-title::before {
      content: '';
      display: block;
      width: 3rem;
      height: 0.25rem;
      background: #C8A951;
      border-radius: 4px;
    }
    /* 粒子背景 */
    #particle-canvas {
      position: absolute;
      top:0; left:0; width:100%; height:100%;
      pointer-events: none;
    }
    .hero-glow {
      position: absolute;
      width: 600px; height: 600px;
      background: radial-gradient(circle, rgba(168,85,247,0.25) 0%, transparent 70%);
      top: 50%; left: 50%;
      transform: translate(-50%, -50%);
      filter: blur(60px);
    }
    /* 手风琴动画 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
      padding: 0 1rem;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 1rem;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: #C8A951;
    }
    /* 移动端导航 */
    @media (max-width: 768px) {
      .mobile-menu {
        display: none;
        position: fixed; top:0; left:0; width:100%; height:100%;
        background: rgba(10,14,23,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        z-index: 100;
      }
      .mobile-menu.open {
        display: flex;
      }
    }
    .nav-link {
      position: relative;
      color: #94A3B8;
      font-weight: 500;
      transition: color 0.2s;
    }
    .nav-link:hover, .nav-link.active {
      color: #C8A951;
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -6px; left:0; width:100%; height:2px;
      background: #C8A951;
    }