/* roulang page: index */
:root {
            --bg-deep: #0A192F;
            --accent: #64FFDA;
            --text-main: #CCD6F6;
            --text-muted: #8892B0;
            --border-line: rgba(100, 255, 218, 0.12);
        }
        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: 'PingFang SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            overflow-x: hidden;
            line-height: 1.75;
        }
        .hero-slant {
            clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-slant {
                clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
            }
        }
        .glow-btn {
            box-shadow: 0 0 15px rgba(100, 255, 218, 0.25);
            transition: all 0.3s ease;
        }
        .glow-btn:hover {
            box-shadow: 0 0 25px rgba(100, 255, 218, 0.5);
            transform: translateY(-2px);
        }
        .glass-card {
            background: rgba(23, 42, 69, 0.65);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-line);
        }
        .glass-card:hover {
            border-color: rgba(100, 255, 218, 0.4);
            transform: translateY(-4px);
        }