/* roulang page: index */
:root {
            --bg-base: #0B0E14;
            --bg-card: #121824;
            --bg-hover: #1A2234;
            --text-primary: #FFFFFF;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(0, 242, 254, 0.25);
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-primary);
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .text-glow {
            text-shadow: 0 0 12px rgba(0, 242, 254, 0.5);
        }
        .card-glow {
            border: 1px solid var(--border-subtle);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-glow:hover {
            border-color: var(--border-glow);
            box-shadow: 0 8px 30px rgba(0, 242, 254, 0.12);
            transform: translateY(-2px);
        }
        .btn-gradient {
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            box-shadow: 0 0 20px rgba(0, 242, 254, 0.3);
            transition: all 0.25s ease;
        }
        .btn-gradient:hover {
            opacity: 0.95;
            box-shadow: 0 0 25px rgba(0, 242, 254, 0.5);
            transform: translateY(-1px);
        }