/* roulang page: index */
:root {
      --deep-midnight: #0A0E27;
      --champagne-gold: #C5A059;
      --bright-gold: #D4AF37;
      --glass-border: rgba(197, 160, 89, 0.2);
      --glass-bg: rgba(10, 14, 39, 0.45);
      --text-soft: #E5E7EB;
      --text-muted: #9CA3AF;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
      background-color: #0A0E27;
      color: #E5E7EB;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
      background-image: radial-gradient(circle at 30% 10%, rgba(197, 160, 89, 0.08) 0%, transparent 40%);
    }

    /* 自定义滚动条 */
    ::-webkit-scrollbar {
      width: 6px;
    }
    ::-webkit-scrollbar-track {
      background: #0A0E27;
    }
    ::-webkit-scrollbar-thumb {
      background: #C5A059;
      border-radius: 3px;
    }

    /* 玻璃拟态差异化卡片 */
    .glass-card {
      background: rgba(17, 24, 56, 0.55);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: 1.5rem;
      box-shadow: 0 20px 35px rgba(0,0,0,0.5), 0 0 25px rgba(197,160,89,0.12);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      border-color: rgba(212, 175, 55, 0.5);
      box-shadow: 0 25px 45px rgba(0,0,0,0.6), 0 0 40px rgba(197,160,89,0.25);
      transform: translateY(-5px);
    }

    /* 金色渐变按钮 */
    .btn-gold {
      background: linear-gradient(135deg, #C5A059 0%, #D4AF37 100%);
      color: #0A0E27;
      font-weight: 700;
      border-radius: 9999px;
      padding: 0.9rem 2.2rem;
      letter-spacing: 0.5px;
      box-shadow: 0 8px 18px rgba(212, 175, 55, 0.3);
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-gold:hover {
      filter: brightness(1.15);
      box-shadow: 0 12px 28px rgba(212, 175, 55, 0.55);
      transform: scale(1.02);
    }

    .btn-outline-gold {
      border: 2px solid #C5A059;
      color: #C5A059;
      background: transparent;
      font-weight: 600;
      border-radius: 9999px;
      padding: 0.85rem 2rem;
      transition: all 0.3s ease;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-outline-gold:hover {
      background: rgba(197, 160, 89, 0.12);
      border-color: #D4AF37;
      color: #D4AF37;
      box-shadow: 0 0 18px rgba(197,160,89,0.4);
    }

    /* 导航与移动端 */
    .nav-blur {
      background: rgba(10, 14, 39, 0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .menu-link {
      position: relative;
      color: #E5E7EB;
      font-weight: 500;
      transition: color 0.2s;
    }
    .menu-link:hover {
      color: #D4AF37;
    }
    .menu-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: #D4AF37;
      transition: width 0.3s ease;
    }
    .menu-link:hover::after {
      width: 100%;
    }

    .pulse-badge {
      animation: pulse-gold 2s infinite;
    }
    @keyframes pulse-gold {
      0% { box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(212, 175, 55, 0); }
      100% { box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
    }

    /* 动态粒子背景模拟 */
    .hero-glow {
      background: radial-gradient(circle at 40% 50%, rgba(212,175,55,0.18) 0%, rgba(10,14,39,0.9) 65%);
    }

    /* 手风琴样式 */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .faq-question {
      cursor: pointer;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: rgba(255,255,255,0.03);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s;
      color: #9CA3AF;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 1.2rem;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: #D4AF37;
    }