/* roulang page: index */
:root {
            --bg-base: #0A0F1D;
            --bg-card: rgba(15, 23, 42, 0.65);
            --border-glow: rgba(59, 130, 246, 0.25);
            --primary-glow: rgba(37, 99, 235, 0.5);
            --cyan-glow: rgba(6, 182, 212, 0.5);
        }
        body {
            background-color: var(--bg-base);
            color: #94A3B8;
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
            transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glass-panel:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: 0 16px 40px -8px rgba(37, 99, 235, 0.3);
        }
        .btn-glow {
            background: linear-gradient(135deg, #06B6D4 0%, #2563EB 100%);
            box-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
            transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.7);
            transform: scale(1.02);
        }
        .btn-outline {
            border: 1px solid rgba(59, 130, 246, 0.4);
            background: rgba(15, 23, 42, 0.4);
            transition: all 250ms ease;
        }
        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.15);
            border-color: #3B82F6;
            color: #FFFFFF;
        }
        .text-glow {
            text-shadow: 0 0 24px rgba(6, 182, 212, 0.45);
        }