/* roulang page: index */
:root {
            --primary: #FF5A1F;
            --primary-hover: #E04810;
            --secondary: #0F172A;
            --mint: #10B981;
            --bg-light: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        body {
            color: var(--text-main);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .hero-bg {
            background-image: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.85)), url('/assets/images/6121134b072512b4.png');
            background-size: cover;
            background-position: center;
        }
        .deep-gradient {
            background: linear-gradient(135deg, #0B1120 0%, #1E293B 100%);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }