/* roulang page: index */
:root {
      --bg-dark: #070a12;
      --bg-midnight: #0b1120;
      --bg-card: rgba(15, 23, 42, 0.75);
      --border-glow: rgba(56, 189, 248, 0.2);
      --border-hover: rgba(0, 242, 254, 0.6);
      --cyan-bright: #00f2fe;
      --blue-electric: #4facfe;
      --live-red: #ff5e62;
      --gold-rate: #f59e0b;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }

    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glow);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .glass-card:hover {
      border-color: var(--border-hover);
      box-shadow: 0 10px 30px -10px rgba(0, 242, 254, 0.25);
      transform: translateY(-3px);
    }

    .btn-gradient {
      background: linear-gradient(135deg, var(--cyan-bright) 0%, var(--blue-electric) 100%);
      box-shadow: 0 4px 20px rgba(0, 242, 254, 0.35);
      transition: all 0.25s ease;
    }

    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 26px rgba(0, 242, 254, 0.55);
    }

    .pulse-live {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--live-red);
      box-shadow: 0 0 0 rgba(255, 94, 98, 0.7);
      animation: pulse 1.6s infinite;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255, 94, 98, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(255, 94, 98, 0); }
      100% { box-shadow: 0 0 0 0 rgba(255, 94, 98, 0); }
    }

    .radar-grid {
      background-size: 30px 30px;
      background-image: 
        linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    }

    .text-glow {
      text-shadow: 0 0 16px rgba(0, 242, 254, 0.5);
    }