/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --bg-base: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            overflow-x: hidden;
        }
        .text-balance {
            text-wrap: balance;
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -10px rgba(37, 99, 235, 0.15), 0 4px 6px -2px rgba(15, 23, 42, 0.05);
        }
        details > summary::-webkit-details-marker {
            display: none;
        }