/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-hover: #1d4ed8;
            --secondary: #0d9488;
            --bg-light: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-light);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            overflow-x: hidden;
        }
        .dock-blur {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .hero-mesh {
            background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(13, 148, 136, 0.06) 0%, transparent 50%);
        }
        .card-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-shadow:hover {
            box-shadow: 0 12px 30px -4px rgba(15, 23, 42, 0.12);
            transform: translateY(-3px);
        }