/* roulang page: index */
:root {
            --bg-base: #060A16;
            --primary: #00F0FF;
            --secondary: #3A86FF;
            --text-main: #F8FAFC;
            --text-sub: #94A3B8;
            --text-muted: #64748B;
            --card-border: rgba(0, 240, 255, 0.18);
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: rgba(15, 23, 42, 0.65);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--card-border);
        }
        .glow-btn {
            background: linear-gradient(135deg, #00F0FF, #3A86FF);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glow-btn:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.75);
            transform: translateY(-2px);
        }
        .grid-mask {
            background-image: linear-gradient(to right, rgba(0, 240, 255, 0.05) 1px, transparent 1px),
                              linear-gradient(to bottom, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
            background-size: 32px 32px;
        }