/* roulang page: index */
:root {
      --primary: #3A36DB;
      --primary-light: #6366F1;
      --accent-gold: #D97706;
      --accent-gold-light: #F59E0B;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-subtle: #E2E8F0;
      --bg-slate: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .brand-gradient-text {
      background: linear-gradient(135deg, #3A36DB 0%, #6366F1 50%, #9333EA 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .gold-gradient-text {
      background: linear-gradient(135deg, #D97706 0%, #F59E0B 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .brand-gradient-bg {
      background: linear-gradient(135deg, #3A36DB 0%, #6366F1 100%);
    }
    .brand-card-glow {
      box-shadow: 0 10px 30px -10px rgba(58, 54, 219, 0.15);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .brand-card-glow:hover {
      box-shadow: 0 20px 40px -10px rgba(58, 54, 219, 0.28);
      transform: translateY(-4px);
    }
    .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10B981;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse-ring 2s infinite;
    }
    @keyframes pulse-ring {
      0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }