/* roulang page: index */
:root {
            --primary: #1D63FF;
            --primary-dark: #0E48CC;
            --accent: #FF7A00;
            --bg-base: #FFFFFF;
            --bg-soft: #F5F8FC;
            --text-main: #0F172A;
            --text-sub: #475569;
            --border-line: #E2E8F0;
            --radius-box: 16px;
            --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --shadow-hover: 0 20px 25px -5px rgba(29, 99, 255, 0.1);
        }
        * { box-sizing: border-box; scroll-behavior: smooth; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--text-main); background-color: var(--bg-base); }
        .hero-bg {
            background-image: linear-gradient(rgba(12, 24, 51, 0.85), rgba(12, 24, 51, 0.92)), url('/assets/images/3be41edba446f545.webp');
            background-size: cover;
            background-position: center;
        }
        .card-custom {
            box-shadow: var(--shadow-card);
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }