/* roulang page: index */
:root {
      --bg-deep: #0B0A1A;
      --gold-dust: #D4A853;
      --warm-pink: #E8C9A0;
      --text-white: #F0EDF7;
      --text-silver: #B8B5CC;
      --card-bg: rgba(30, 28, 48, 0.8);
      --border-purple: rgba(180, 160, 210, 0.25);
      --shadow-card: 0 8px 32px rgba(180, 160, 210, 0.12);
      --shadow-hover: 0 16px 48px rgba(212, 168, 83, 0.2);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-white);
      line-height: 1.75;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }
    .font-inter {
      font-family: 'Inter', system-ui, sans-serif;
    }
    .text-gradient {
      background: linear-gradient(135deg, #F0EDF7 0%, #D4A853 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .card-hover {
      transition: all 0.3s ease;
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-purple);
      box-shadow: var(--shadow-card);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(212, 168, 83, 0.4);
    }
    .nav-glow {
      position: relative;
    }
    .nav-glow::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: #D4A853;
      box-shadow: 0 0 8px rgba(212, 168, 83, 0.6);
      transition: width 0.3s ease;
    }
    .nav-glow:hover::after,
    .nav-glow.active::after {
      width: 100%;
    }
    .star-bg {
      background-image: radial-gradient(2px 2px at 20% 30%, rgba(255,255,255,0.8), transparent),
                        radial-gradient(2px 2px at 40% 70%, rgba(255,255,255,0.6), transparent),
                        radial-gradient(1px 1px at 90% 20%, rgba(212,168,83,0.7), transparent),
                        radial-gradient(2px 2px at 10% 80%, rgba(255,255,255,0.5), transparent),
                        radial-gradient(2px 2px at 70% 40%, rgba(232,201,160,0.8), transparent),
                        radial-gradient(1px 1px at 50% 10%, #fff, transparent),
                        radial-gradient(2px 2px at 80% 60%, rgba(212,168,83,0.9), transparent);
      background-size: 200px 200px;
    }
    .glow-line {
      background: linear-gradient(90deg, transparent, rgba(212,168,83,0.3), transparent);
      height: 1px;
      width: 100%;
    }
    @keyframes countUp {
      0% { opacity: 0; transform: translateY(20px); }
      100% { opacity: 1; transform: translateY(0); }
    }
    .count-animate {
      animation: countUp 0.8s ease-out forwards;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-top: 12px;
    }
    @media (max-width: 768px) {
      .card-hover:hover {
        transform: none;
      }
      .mobile-menu {
        display: none;
      }
      .mobile-menu.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: rgba(11,10,26,0.96);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border-purple);
      }
    }