/* roulang page: index */
:root {
            --bg-main: #0A0F1D;
            --card-bg: rgba(16, 24, 48, 0.75);
            --border-glow: rgba(56, 189, 248, 0.2);
            --gradient-accent: linear-gradient(135deg, #0066FF 0%, #00D2FF 100%);
        }
        body {
            background-color: var(--bg-main);
            color: #CBD5E1;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .glow-btn {
            background: var(--gradient-accent);
            box-shadow: 0 4px 20px rgba(0, 102, 255, 0.35);
            transition: all 0.3s ease;
        }
        .glow-btn:hover {
            box-shadow: 0 0 25px rgba(0, 210, 255, 0.65);
            transform: translateY(-2px);
        }
        .glass-card {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
        }
        .glass-card:hover {
            border-color: rgba(56, 189, 248, 0.4);
            transform: translateY(-3px);
            box-shadow: 0 15px 35px -10px rgba(0, 102, 255, 0.25);
        }
        .text-glow {
            text-shadow: 0 0 15px rgba(0, 210, 255, 0.5);
        }