/* roulang page: index */
:root {
            --primary: #0EA5E9;
            --primary-dark: #0284C7;
            --secondary: #10B981;
            --bg-main: #F8FAFC;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-line: #E2E8F0;
        }
        body {
            background-color: var(--bg-main);
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            overflow-x: hidden;
        }
        .hero-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(14, 165, 233, 0.88) 100%), url('/assets/images/75e214f5082b3501.png') center/cover no-repeat;
        }
        .dark-engine-bg {
            background: radial-gradient(circle at 80% 20%, rgba(14, 165, 233, 0.15) 0%, transparent 60%), #0F172A;
        }