/* roulang page: index */
:root {
      --deep-purple: #1E1040;
      --electric-gold: #D4A843;
      --gold-dark: #B8922E;
      --space-black: #0B0B1A;
      --card-bg: rgba(30, 16, 64, 0.6);
      --glass-border: rgba(212, 168, 67, 0.15);
      --text-primary: #F5F5FC;
      --text-secondary: #B0B0C0;
      --text-muted: #8A8A9A;
      --radius-card: 16px;
      --radius-btn: 24px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
      --shadow-gold: 0 0 24px rgba(212, 168, 67, 0.5);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'Inter', 'MiSans', 'PingFang SC', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--space-black);
      color: var(--text-primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    /* 导航 */
    .glass-nav {
      background: rgba(11, 11, 26, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid transparent;
      background-image: linear-gradient(rgba(11,11,26,0.85), rgba(11,11,26,0.85)), linear-gradient(90deg, var(--electric-gold), var(--deep-purple));
      background-origin: border-box;
      background-clip: padding-box, border-box;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      transition: background 0.3s ease;
    }
    .logo-text {
      background: linear-gradient(135deg, #E5C56C 0%, #D4A843 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: 1px;
    }
    .nav-link {
      color: #C0C0D0;
      font-weight: 500;
      transition: color 0.2s, text-shadow 0.2s;
      font-size: 0.95rem;
    }
    .nav-link:hover {
      color: var(--electric-gold);
      text-shadow: 0 0 8px rgba(212,168,67,0.4);
    }
    .btn-gold {
      background: linear-gradient(135deg, #D4A843 0%, #B8922E 100%);
      color: #0B0B1A;
      font-weight: 600;
      border-radius: 24px;
      padding: 0.6rem 1.8rem;
      transition: all 0.25s;
      box-shadow: 0 4px 12px rgba(212,168,67,0.3);
      border: none;
      letter-spacing: 0.3px;
    }
    .btn-gold:hover {
      box-shadow: 0 0 28px rgba(212,168,67,0.6);
      transform: translateY(-1px);
      background: linear-gradient(135deg, #E5C56C, #C9A03A);
    }
    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--electric-gold);
      color: var(--electric-gold);
      font-weight: 600;
      border-radius: 24px;
      padding: 0.6rem 1.8rem;
      transition: all 0.25s;
    }
    .btn-outline-gold:hover {
      background: rgba(212,168,67,0.12);
      border-color: #E5C56C;
      color: #E5C56C;
    }
    /* 卡片玻璃效果 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: var(--radius-card);
      border: 1px solid var(--glass-border);
      box-shadow: var(--shadow-card);
      transition: transform 0.25s ease, box-shadow 0.3s ease;
    }
    .glass-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 48px rgba(212,168,67,0.15);
      border-color: rgba(212,168,67,0.3);
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      color: #FFFFFF;
    }
    .gold-sub {
      color: var(--electric-gold);
      font-size: 1.1rem;
      font-weight: 500;
      letter-spacing: 0.4px;
    }
    .hero-bg {
      background: radial-gradient(circle at 30% 40%, rgba(30,16,64,0.7) 0%, #0B0B1A 85%);
      position: relative;
      overflow: hidden;
    }
    .particle {
      position: absolute;
      background: radial-gradient(circle, rgba(212,168,67,0.8) 0%, transparent 70%);
      border-radius: 50%;
      animation: float 12s infinite alternate ease-in-out;
    }
    @keyframes float {
      0% { transform: translateY(0px) scale(1); opacity: 0.3; }
      100% { transform: translateY(-30px) scale(1.2); opacity: 0.6; }
    }
    input, textarea {
      background: rgba(20,20,40,0.7);
      border: none;
      border-bottom: 1px solid rgba(212,168,67,0.4);
      color: white;
      padding: 0.8rem 0.5rem;
      outline: none;
      transition: border-color 0.2s;
      width: 100%;
      border-radius: 4px 4px 0 0;
    }
    input:focus, textarea:focus {
      border-bottom-color: var(--electric-gold);
      box-shadow: 0 4px 12px rgba(212,168,67,0.2);
    }
    .faq-item {
      border-bottom: 1px solid rgba(212,168,67,0.2);
      padding: 1.2rem 0;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1);
      color: #C0C0D0;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
    }
    footer a {
      color: #B0B0C0;
      transition: color 0.2s;
    }
    footer a:hover {
      color: var(--electric-gold);
    }
    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .section-title { font-size: 1.8rem; }
    }